JP3551970B2 - Divers information processing apparatus, divers information processing apparatus control method, control program, and recording medium - Google Patents

Description

The present invention relates to an information processing apparatus for divers, a control method, a control program, and a recording medium, and more particularly to an information processing apparatus for divers used for performing deep diving, a control method thereof, a control program, and a recording medium.

It is known that inert gas such as nitrogen in the respiratory gas dissolved in a body by diving becomes bubbles in the body and causes decompression sickness.
In addition, in air diving using ordinary air as a breathing gas, there is a difference depending on the constitution and skill level, but when diving at a water depth of about 30 meters or more, the possibility of causing nitrogen poisoning increases.

In order to solve such problems, as a diver's information processing device called a dive computer, information necessary to ensure the safety of the diver with a certain algorithm when diving, such as the current water depth value and excess in the body It is known that a time required for discharging the inert gas accumulated in the apparatus and a safe floating speed are obtained, and the obtained information is displayed on a display unit such as a liquid crystal display panel. Such an information processing device for divers is disclosed in, for example, Patent Document 1.
Further, when diving deeper, a mixed gas dive using a mixed gas of oxygen and nitrogen with an increased oxygen concentration is used.
However, even in the above-described conventional mixed gas diving, when the water depth exceeds about 40 meters, the possibility of causing oxygen poisoning increases.
Further, when a plurality of cylinders having different mixing ratios of the diving gas are used, incorrect switching may lead to oxygen deficiency.
JP-A-11-20787

By the way, in work diving and the like, diving (high-depth diving) that dives deeper than 40 meters is very common.
Accordingly, an object of the present invention is to provide an information processing apparatus for divers capable of providing information for preventing the occurrence of decompression sickness, nitrogen poisoning, oxygen poisoning or oxygen deficiency in deep diving, a control method thereof, and a control program And a recording medium.

In order to solve the above problems, a divers information processing apparatus used for diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases is an oxygen An oxygen partial pressure calculation / monitoring unit for calculating and monitoring the partial pressure is provided, and when the operator selects any one of the cylinders to switch to a cylinder having a different mixing ratio of the diving gas, the selected cylinder becomes an oxygen. When it is determined that there is a risk of deficiency or oxygen poisoning, processing is performed to prohibit switching to the selected cylinder.
According to the above configuration, the oxygen partial pressure calculating / monitoring unit calculates and monitors the oxygen partial pressure.
Thereby, when the operator selects any cylinder to switch to a cylinder with a different mixing ratio of the diving gas, when it is determined that the selected cylinder is likely to be oxygen deficient or oxygen poisoning, Processing is performed to prohibit switching to the selected cylinder.

In this case, the cylinder may contain oxygen as the diving gas.
Further, the oxygen partial pressure calculating / monitoring unit notifies an oxygen partial pressure violation determining unit that determines whether there is a possibility of oxygen poisoning or oxygen deficiency, and notifies the user when there is a possibility of oxygen poisoning or oxygen deficiency. And a notifying unit.
Further, the operator has selected to switch to the same or different cylinder with the same mixing ratio of the diving gas, and selected when the oxygen partial pressure value of the selected cylinder is determined to be free from oxygen deficiency or oxygen poisoning. Processing may be performed to permit switching to a cylinder.
Furthermore, the notification unit may display whether or not the cylinder can be switched, by using a display, an alarm sound, an EL backlight, or the like.
Further, a timer for measuring the elapsed time of the dive, a depth measuring unit for detecting the depth of the water, and a depth measuring unit for detecting the depth of the water corresponding to the elapsed time of the predetermined dive, and the detected depth of the water. A dive information storage unit for storing the dive elapsed time.

Further, an information processing apparatus for divers used to perform diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gas is provided in each of the cylinders during diving. A switching condition storage unit for storing the switching condition for each cylinder, a switching destination cylinder selecting unit for allowing an operator to select the switching destination cylinder, and oxygen poisoning or oxygen deficiency when it is assumed that the cylinder has been switched. A safety determination unit that determines whether or not there is a risk of, and a warning unit that warns when the determination result of the safety determination unit determines that there is a risk of oxygen poisoning or oxygen deficiency, It is characterized by having.
According to the configuration, the switching condition storage unit stores the switching condition of each of the cylinders during the dive for each of the cylinders.
The switching destination cylinder selection unit allows the operator to select the switching destination cylinder.
As a result, the safety determination determines whether there is a risk of oxygen poisoning or oxygen deficiency when the cylinder is switched, and the warning unit determines that the determination result of the safety determination unit is oxygen poisoning or oxygen depletion. If it is determined that there is a risk of deficiency, a warning is given.

In this case, a cylinder information presentation unit that presents information about the selected switching destination cylinder may be provided.
Further, the cylinder information presentation unit may present, as information about the switching destination cylinder, the mixing ratio of the diving gas of the switching destination cylinder and diving state information when the cylinder is switched. Good.
Further, the cylinder information presentation unit may present, as the diving state information, a non-decompression diving time or a decompression diving instruction and an oxygen partial pressure.

In addition, a control method of a diver's information processing apparatus used for performing diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases includes an oxygen partial pressure. The oxygen partial pressure calculation / monitoring process for calculating and monitoring the pressure, and when the operator selects any cylinder to switch to the same or different cylinder with the same mixing ratio of the diving gas, the selected cylinder becomes oxygen deficient. Or a switching prohibition step of performing a process to prohibit switching to the selected cylinder when it is determined that there is a possibility of oxygen poisoning.
In this case, the oxygen partial pressure calculating / monitoring process includes an oxygen partial pressure violation determining process of determining whether there is a possibility of oxygen poisoning or oxygen deficiency, and an oxygen partial pressure or oxygen deficiency determining process. And a notifying step of notifying.
Further, the operator has selected to switch to the same or different cylinder with the same mixing ratio of the diving gas, and selected when the oxygen partial pressure value of the selected cylinder is determined to be free from oxygen deficiency or oxygen poisoning. Processing may be performed to permit switching to a cylinder.

Further, in the notification step, whether or not the cylinder can be switched may be displayed, an alarm sound, an EL backlight, or the like.
Furthermore, a timing process for measuring the elapsed time of the dive, a depth measurement process for detecting the depth of the water, a depth value corresponding to a predetermined elapsed time of the dive, and the detected depth value and the elapsed time of the dive are detected. And a diving information storing step of storing the diving information.
The control method of the information processing apparatus for divers used for diving using a cylinder includes a switching condition storing step of storing a switching condition of each of the cylinders during diving for each of the cylinders, and operating the cylinder to be switched to. A switching destination cylinder selection step for allowing the user to select, a safety determination step of determining whether there is a risk of oxygen poisoning or oxygen deficiency when the cylinder is switched, and a determination in the safety determination step And a warning process for warning that the result indicates that there is a risk of oxygen poisoning or oxygen deficiency.

In this case, a cylinder information presenting step of presenting information about the selected switching destination cylinder may be provided.
Further, the cylinder information presenting step may present, as the information on the switching destination cylinder, the mixing ratio of the diving gas of the switching destination cylinder and the diving state information on the assumption that the cylinder has been switched. Good.
Further, in the cylinder information presenting step, non-decompression diving possible time or decompression diving instruction and oxygen partial pressure may be presented as the diving state information.
Also, a control for controlling by computer a divers information processing device used for diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases. The program causes the calculation and monitoring of the oxygen partial pressure to be performed, and when the operator selects any one of the cylinders to switch to the same or different cylinder having the same mixing ratio of the diving gas, the selected cylinder is oxygen deficient or It is characterized in that it is determined whether or not there is a risk of oxygen poisoning, and if it is determined that there is a risk, a process is performed to prohibit switching to the selected cylinder.

In this case, whether or not there is a possibility of oxygen poisoning or oxygen deficiency may be determined based on the oxygen partial pressure, and if there is a possibility of oxygen poisoning or oxygen deficiency, the fact may be notified.
Further, the operator has selected to switch to the same or different cylinder with the same mixing ratio of the diving gas, and selected when the oxygen partial pressure value of the selected cylinder is determined to be free from oxygen deficiency or oxygen poisoning. Processing may be performed to permit switching to a cylinder.
Further, whether or not the cylinder can be switched may be displayed, an alarm sound, an EL backlight, or the like may be notified.
Furthermore, the dive elapsed time is measured, the water depth value is detected, the water depth value is detected corresponding to a predetermined dive elapsed time, and the detected water depth value and the dive elapsed time are stored. May be.
Also, a control for controlling by computer a divers information processing device used for diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases. The program stores the switching condition of each of the cylinders during diving for each of the cylinders, prompts the operator to select the cylinder to be switched to, and may cause oxygen poisoning or oxygen deficiency when the cylinder is switched. Or not, and when it is determined that there is a risk of oxygen poisoning or oxygen deficiency, a warning is given to that effect.

In this case, information about the selected switching destination cylinder may be presented.
Further, as the information on the switching destination cylinder, the mixing ratio of the diving gas of the switching destination cylinder and the diving state information when the cylinder is switched may be presented.
Further, as the diving state information, a non-decompression diving possible time or a decompression diving instruction and an oxygen partial pressure may be presented.
Further, each of the control programs can be recorded on a computer-readable recording medium.

  According to the present invention, even when performing diving using a plurality of cylinders each containing a plurality of mixed gases having different mixing ratios of a plurality of types of diving gas, it is also possible to reduce the possibility of oxygen poisoning or oxygen deficiency. Switching can be prevented or a notification (warning) can be made, so that diving can be performed safely.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
[1] Overall Configuration In the present embodiment, an information processing apparatus for divers, which is a so-called dive computer, is provided with a floating-sink management function.
First, the overall configuration will be described.
FIG. 1 is a schematic configuration block diagram of a dive computer.
The dive computer 100 is roughly divided into a power supply PW, an MPU 1, a display unit 2, a timing unit 3, a pressure sensor 4, an analog / digital converter (hereinafter, A / D converter) 5, a ROM 6, And a RAM 7.
The power supply PW supplies electric energy to the entire dive computer.
The MPU 1 controls the entire dive computer based on a control program stored in the ROM 6.
The display unit 2 is configured by a liquid crystal display or the like, and displays various information under the control of the MPU 1.

The timer section 3 measures the dive time, determines the calculation timing in the dive computer, and measures the elapsed time of the dive for acquiring necessary data such as rest time and storage and display of the dive time.
The pressure sensor 4 operates when the power switch is turned on, detects the surrounding pressure, converts it to a corresponding voltage, and outputs it as a pressure detection signal.
The A / D converter 5 converts the pressure detection signal of the pressure sensor 4 from analog to digital and outputs it to the MPU 1 as pressure data.
The ROM 6 is a nonvolatile read-only memory that stores various control programs and the like in advance. The ROM 6 stores in advance various data necessary for calculation such as body division, half time, maximum allowable nitrogen partial pressure, and the like, which are used for planning a no-decompression diving.
The RAM 7 is a volatile memory that temporarily stores various information. For example, diving data and calculation result data of the MPU 1 are stored.

FIG. 2 is a detailed configuration block diagram of the dive computer.
The dive computer is roughly divided into a display unit 2, a timer unit 3, a notification unit 8, a control / calculation unit 9, a water pressure / water depth measurement unit 10, a switch operation unit 11, a diving operation monitoring switch 12, , A water temperature measuring unit 26.
The display unit 2 includes a liquid crystal display panel 16 that displays information in each mode, and a liquid crystal driver 15 that performs display driving of the liquid crystal display panel 16.
The timer section 3 counts the clock in units of one second by counting the oscillation circuit 20 that outputs the reference clock signal, the frequency divider circuit 19 that divides the reference clock signal, and the frequency-divided clock signal of the frequency divider circuit 19. And a time counter 18 for performing the measurement, and outputs a time measurement result to the control / calculation unit 9.
The notification unit 8 includes a notification device 13 for notifying various types of notification information to a diver via sound, light, and the like, and a vibration generating device 14 for notifying various types of notification information to a diver by vibration.
The control / arithmetic unit 9 includes an MPU 1, a ROM 6, a RAM 7, and a control circuit 17 for performing various controls under the control of the MPU 1.

The water pressure / depth measuring unit 10 is a pressure sensor 4, an amplification circuit 21 for amplifying an output signal of the pressure sensor 4, and an analog / digital conversion of an output signal of the amplification circuit 21, and outputs to the control / calculation unit 9 / D converter 5 for measuring the water pressure and the water depth.
The switch operation unit 11 includes an operator, and a diver performs various operations.
The diving operation monitoring switch 12 detects whether or not the dive computer is underwater in order to detect whether or not the dive computer has shifted to a diving state.
The water temperature measurement unit 26 includes a water temperature measurement sensor 26A, an amplification circuit 26B that amplifies an output signal of the water temperature measurement sensor 26A, and an analog / digital conversion of an output signal of the amplification circuit 26B and outputs the signal to the control / calculation unit 9. / D converter 26C, and measures the water temperature.

[2] Ascent Rate Monitoring Function FIG. 3 is a functional block diagram for realizing the ascent rate monitoring function.
The dive computer is configured to monitor the diver's ascent speed during the dive mode, and this function is implemented as the following configuration using the functions of the MPU 1, the ROM 6, the RAM 7, and the like.
In the dive computer, as shown in FIG. 3, a rising speed measuring unit 22 that measures a rising speed when ascending based on the timing result of the timing unit 3 and the measurement result of the water depth measuring unit 10, and a measurement result of the rising speed measuring unit 22. And a flying speed violation determining unit 24 that compares the flying speed reference data 23 set in advance with the floating speed reference data 23 and issues a flying speed violation warning if the current floating speed is higher than the floating reference speed corresponding to the floating speed reference data 23. A diving result storage unit 25 that stores various diving data such as diving history, a water temperature measuring unit 26 that has a water temperature measuring sensor 26A, and measures the water temperature at predetermined measurement timings, and calculates the oxygen partial pressure in the respiratory air. An oxygen partial pressure calculating / monitoring unit 27 for monitoring, and an oxygen partial pressure violation determining unit for determining whether or not the calculated oxygen partial pressure is likely to cause oxygen poisoning or oxygen deficiency. 8, a notification unit 29 for notifying the various warnings, and a warning display unit 30 for displaying various warnings, the.

Specifically, in the present embodiment, the ascent rate determining unit 24 compares the ascent rate for each water depth range stored in the ROM 6 as the ascent rate reference data 23 with the current ascent rate. If the ascent speed is higher than the ascent reference speed at the current depth, the ascent speed is violated by a method such as generation of an alarm sound from the notification device 13 and blinking of the display, and transmission of vibration from the vibration generation device 14 to the diver. When the ascent speed becomes equal to or lower than the ascent reference speed, the ascent speed warning is stopped.
In the present embodiment, the following values are set as the rising speed reference data 23 as examples of each water depth range.
Water depth range Ascent rate less than 1.8m No warning 1.8m-5.9m 8m / min (about 0.8m / 6 seconds)
6.0m-17.9m 12m / min (approximately 1.2m / 6 seconds)
18m or more 16m / min (about 1.6m / 6s)

The reason why the ascent rate reference value is set to be larger at deeper water depths is that the water pressure ratio before and after ascent per unit time at deeper water depths even at the same ascent rate Is small, so that decompression sickness can be sufficiently prevented even if a relatively large ascent speed is allowed. On the other hand, in a place where the water depth is shallow, the water pressure ratio before and after ascent per unit time is large even when ascending at the same ascent speed, so that only a relatively small ascent speed is allowed.
In the present embodiment, the ascent rate value per 6 seconds is stored in the ROM 6 as the ascent rate reference data 23, even if the water depth is measured every second, the movement of the arm to which the dive computer is attached is determined. This is to prevent the calculated flying speed from being affected. That is, the ascent speed measurement is also performed every 6 seconds for the same reason. Therefore, the difference between the current depth value measured this time and the previous depth value measured 6 seconds ago is calculated, and this difference corresponds to the ascent speed reference data 23. And compare it with the ascending reference speed.
In addition, the dive result storage unit 25 of the dive computer indicates that the water depth value measured by the water depth measurement unit 10 becomes shallower than 1.5 m again from the point in time when the dive was deeper than 1.5 m (dive start determination water depth value). The dive result data (dive date / time data, dive control number data, dive time data, maximum dive depth data, water temperature data at the maximum dive depth, etc.) is stored and held in the RAM 7 up to the time point as one dive operation. . The diving result storage unit 25 is also realized as the functions of the MPU 1, ROM 6, and RAM 7 shown in FIG.

Here, the dive result storage unit 25 indicates that the ascent rate violation has occurred when the ascent rate violation determination unit 24 has issued a plurality of warnings continuously for one dive, for example, two or more warnings in succession. Is stored as a diving result.
The dive result storage unit 25 stores the dive time of the timer unit 3 until the water depth value measured by the water depth measurement unit 10 becomes deeper than 1.5 m (new water for diving start determination) and then becomes shallower than 1.5 m again. The dive time is measured based on the measurement result. If the dive time is less than 3 minutes, the dive during this time is not treated as one dive, and the dive result during that time is not recorded. This is because there is a possibility that important diving records may be updated due to the storage capacity when attempting to memorize all the data up to a short dive such as diving.
As described above, the dive computer of the embodiment determines that a new dive has been started when the water depth is 1.5 m or less and the dive time is 3 minutes or more. When it is less than 5 m, it is treated as a water depth of 0 m. As a result, when the water depth is slightly deeper than 1.5 m, a dive warning is issued even though the dive computer only keeps the ascent speed when the water depth is less than 1.5 m by raising the arm. May occur.
Therefore, in this case, in such a case, the flying speed violation warning is not issued, and the reliability of the flying speed violation warning is improved.

[3] Oxygen partial pressure calculating method The oxygen partial pressure PO2 is expressed by the following equation, where Pw is the current water pressure, Pa is the atmospheric pressure, and FO2 is the oxygen mixing ratio in the respiratory gas.
PO2 = (Pw + Pa) × FO2
For example, if the current water depth is 16 m, the corresponding current water pressure Pw = 1.6 bar. At this time, it is assumed that the atmospheric pressure Pa 酸 素 1 bar and the oxygen mixture ratio FO2 = 36%.
PO2 = (1.6 + 1) .times.0.36
≒ 0.9 bar
It becomes.
Here, in the dive computer of the present embodiment, the oxygen partial pressure maximum allowable value PO2 max is set to 1.6 bar from the viewpoint of preventing oxygen poisoning (oxygen sickness).

Therefore, a diver performing diving according to the simulation result is a proper diving if the oxygen partial pressure PO2 is equal to or less than the maximum oxygen partial pressure allowable value PO2max, and can protect himself from oxygen poisoning (oxygen sickness).
In the dive computer of the present embodiment, the minimum allowable oxygen partial pressure PO2 min is set to 0.16 bar from the viewpoint of preventing oxygen deficiency.
As described above, in the dive computer of this embodiment, the maximum allowable oxygen partial pressure PO2 max is set to 1.6 bar and the minimum allowable oxygen partial pressure PO2 min is set to 0.16 bar. For example, in order to make the diver who is the user aware of the danger, for example, a warning is issued at the maximum allowable oxygen partial pressure value PO2max = 1.3 to 1.4 bar, and switching of the gas cylinder is prohibited. The software can be set on the safe side by software using a control program. Similarly, the setting of the minimum allowable oxygen partial pressure value PO2 min can be changed to a safe side.
In this embodiment, the oxygen partial pressure PO2 indicating the degree of danger of oxygen poisoning or oxygen deficiency during the dive is calculated by the oxygen partial pressure calculation / monitoring calculation unit 27, and whether the oxygen partial pressure PO2 is within an appropriate range is determined. The judgment is made by the pressure violation judging unit 28, and if necessary, the alarm is notified by various warning displays, alarm sounds, and the like via the notifying unit.
The calculated value of the oxygen partial pressure PO2 is displayed on the liquid crystal display panel 16.

[4] Functional Configuration of Dive Computer when Calculating Inert Gas FIG. 4 is a functional configuration block diagram for realizing a function of calculating the amount of inert gas in the body of the dive computer.
Next, a functional configuration for calculating the amount of inert gas accumulated in the diver in the dive computer will be described with reference to the block diagram of FIG. In this case, the inert gases in the body are nitrogen and helium, and the amounts of nitrogen (nitrogen partial pressure) and helium (helium partial pressure) are calculated.
As shown in FIG. 4, the dive computer includes a respiratory gas inert gas partial pressure calculating unit 31, a respiratory gas inert gas partial pressure storage unit 32, a comparing unit, in addition to the above-described timer unit 3 and water pressure / depth measuring unit 10. 33, a half-saturation time selection unit 34, an in-vivo inert gas partial pressure calculation unit 35, an in-vivo inert gas partial pressure storage unit 36, an in-vivo inert gas partial pressure discharge time derivation unit 37, and a dive available time derivation unit 38. I have. These can be realized by the components shown in FIG. 2 and software executed by the MPU 1, the ROM 6, and the RAM 7. However, the present invention is not limited to this, and it is also possible to realize by combining only a logic circuit which is hardware, or a combination of a logic circuit, a processing circuit including an MPU, and software.

The respiratory gas inert gas partial pressure measuring unit 31 calculates a respiratory gas inert gas partial pressure PIN2 (t) to be described later based on the water pressure P (t) at the current time t, which is the measurement result of the water pressure / water depth measuring unit 10. I do.
Accordingly, the respiratory gas inert gas partial pressure storage unit 32 stores the respiratory gas inert gas partial pressure PIN2 (t) calculated by the respiratory gas inert gas partial pressure calculation unit 31.
On the other hand, the half-saturation time selection unit 34 outputs the half-saturation time TH used for calculating the in-vivo inert gas partial pressure to the in-vivo inert gas partial pressure calculation 35. The in-vivo inert gas partial pressure calculation unit 35 calculates an in-vivo inert gas partial pressure PGT (t), which will be described later, for each tissue site having a different rate of inert gas absorption / extraction. The in-vivo inert gas partial pressure storage unit 36 stores the in-vivo inert gas partial pressure PGT (t) calculated by the in-vivo inert gas partial pressure calculation unit 35.
As a result, the comparing unit 33 compares the respiratory gas inert gas partial pressure PIN2 (t) and the body inert gas partial pressure PGT (t), and varies the half-saturation time TH based on the comparison result.

[4] Method for calculating partial pressure of inert gas in the body Next, a specific method for calculating the partial pressure of inert gas in the body will be described. The calculation method of the inert gas partial pressure in the body performed by the dive computer 1 of the present embodiment is described in, for example, “DIVE COMPUTERS A CONSUMER'S GUIDE TO HISTORY, THEORY &” by KEN LOYST et al.
PERFORMANCE ", Watersport Publishing Inc. (1991)," Decompression-Decompression Sickness "by AA Buhlmann (especially page 14), and Springer, Berlin (1984). Note that the calculation method of the inert gas partial pressure in the body shown here is merely an example, and various other methods can be used.
First, the water pressure / water depth measuring unit 10 outputs a water pressure P (t) corresponding to time t. Here, P (t) means the absolute pressure including the atmospheric pressure.
The respiratory gas inert gas partial pressure calculator 31 calculates the respiratory gas inert gas partial pressure corresponding to the air in which the diver is breathing, based on the water pressure P (t) output from the water pressure / water depth measuring unit 10. Calculate and output PIN2 (t). Here, the respiratory gas inert gas partial pressure PIN2 (t) is calculated by the following equation using the water pressure P (t).
PIN2 (t) = (inert gas mixture ratio) × P (t) [bar] (1)

The respiratory gas inert gas partial pressure storage unit 32 stores the value of the respiratory gas inert gas partial pressure PIN2 (t) calculated by the respiratory gas inert gas partial pressure calculation unit 31 as in equation (1).
The in-vivo inert gas partial pressure calculation unit 64 calculates the in-vivo inert gas partial pressure for each in-vivo tissue having a different inert gas absorption / extraction rate.
For example, taking one tissue as an example, the in-vivo inert gas partial pressure PGT (tE) absorbed / exhausted during the dive time t = t0 to tE is the in-vivo inert gas content at the start of calculation (= t0 time). The pressure PGT (t0) is calculated by the following equation.
PGT (tE) = PGT (t0)
+ {PIN2 (t0) -PGT (t0)}
× {1-exp (-K (tE-t0) / HT)} (2)

Here, K is a constant experimentally obtained, and HT is a time (hereinafter, referred to as a half-saturation time) from when an inert gas is dissolved in each tissue to reach half of a saturated state, and varies depending on each tissue. It is a numerical value. The half-saturation time HT is variable according to the magnitude of PGT (t0) and PIN2 (t0), as described later. The measurement of time, such as time t0 or time tE, is managed by the timer 68 shown in FIG.
The in-vivo inert gas amount calculation unit 60 repeatedly executes the calculation of the in-vivo inert gas partial pressure PGT (t) at a predetermined sampling cycle tE. At this time, the in-vivo inert gas partial pressure PGT (tE) calculated for each sampling cycle by the formula is supplied to the in-vivo inert gas discharge time deriving unit 37 and the dive possible time deriving unit 38, and also to the comparing unit 33. It is supplied to the in-vivo inert gas partial pressure discharge time deriving unit 37 as PGT (t0). This means that the PGT (tE) at the previous sampling is used as the PGT (t0) in the equation.
By the way, prior to the above calculation, the comparing unit 33 reads the respiratory-gas inert gas partial pressure PIN2 (t0) stored in the respiratory-gas inert gas partial pressure storage unit 32 and the in-vivo inert-gas partial pressure storage unit 36. The supplied PGT (t0) is compared, and the comparison result is output to the half-saturation time selection unit 74. The half-saturation time selection unit 74 stores two types of half-saturation times HT (half-saturation times HT1 and HT2 to be described later) to be used by the in-vivo inert gas partial pressure calculation unit 35 for calculating the partial pressure. The half-saturation time HT1 or HT2 is selected according to the comparison result, and output to the in-vivo inert gas partial pressure calculation unit 35.

The in-vivo inert gas partial pressure calculation unit 35 lowers the in-vivo inert gas partial pressure PGT (tE) at time t = tE using the half-saturation time HT1 or HT2 selected by the half-saturation time selection unit 34. It is calculated by the formula.
(A) When PGT (t0)> PIN2 (t0) PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)}
× {1-exp (-K (tE-t0) / HT1)} (3)
(B) When PGT (t0) <PIN2 (t0) PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)}
× {1-exp (-K (tE-t0) / HT2)} (3 ')
In the above equations (3) and (3 ′), HT2 <HT1. When PGT (t0) = PIN2 (t0), it is preferable to determine the half-saturation time HT as in the following equation.
HT = (HT1 + HT2) / 2 (4)

Here, the reason why the half-saturation time HT is different between PGT (t0)> PIN2 (t0) and PGT (t0) <PIN2 (t0) will be described.
First, when PGT (t0)> PIN2 (t0), the inert gas is discharged from the body. Conversely, when PGT (t0) <PIN2 (t0), the inert gas is absorbed into the body. This is the case. That is, since the discharge of the inert gas takes a longer time than the absorption of the inert gas, the half-saturation time HT1 when the inert gas is discharged is longer than the half-saturation time HT2 when the inert gas is absorbed. Set it. By using different half-saturation times HT at the time of discharge and at the time of absorption, it is possible to more strictly simulate the amount of inert gas in the body. Therefore, based on the inert gas partial pressure obtained by the virtual inert gas calculating unit 80, even more accurate values can be obtained when calculating the non-decompression diving time and the inert gas discharge time in the body as described later. Can be calculated. The in-vivo inert gas amount calculation unit 60 obtains the latest in-vivo inert gas partial pressure of the diver who is diving by calculating the in-vivo inert gas partial pressure PGT (t) as described above. Becomes possible.

[5] Method of calculating non-decompression diving time and in-vivo inert gas discharge time Calculated by the in-vivo inert gas partial pressure PGT (tE) obtained as described above and the respiratory-air inactive gas partial pressure calculation unit 62. Based on the respiratory gas inert gas partial pressure PIN2 (tE) at t = tE, the non-decompression diving possible time and the in-vivo inert gas discharge time are calculated as follows. The no-decompression diving time is calculated by calculating (tE-t0) when PGT (tE) calculated in the formula is Ptol indicating the permissible supersaturated inert gas amount of each tissue. At this time, since the present time is considered to be t0, the internal inert gas partial pressure PGT (tE) obtained by the internal inert gas amount calculation unit 60 is used as PGT (t0) in the equation, and PIN2 (t0) is used as PGT (t0). The respiratory gas inert gas partial pressure PIN2 (tE) calculated by the respiratory gas inert gas partial pressure calculation unit 62 is used. That is,
tE−t0 = −HT × (ln (1-f)) / K (5)
However,
f = (Ptol-PGT (tE)) / (PIN2 (tE) -PGT (tE)). With this formula, all of the no-decompression diving time in each tissue is calculated, and the smallest value among them is the no-decompression diving possible time to be obtained. The no-decompression diving possible time calculated in this way is displayed in a diving mode as described later.

Next, a method of calculating the in-vivo inert gas discharge time until the in-vivo inert gas is discharged after ascending the water surface will be described.
In order to calculate the inert gas discharge time in the body, PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)} described above.
× {1-exp (-K (tE-t0) / HT)} (6)
In the above, when the surface of the water floats, t0
PGT (tE) = 0
TE that satisfies is obtained. However, in the exponential function as in the above equation, unless tE becomes infinite, PGT (tE) = 0 does not hold. Therefore, the inactive body gas exhaust time tZ for each tissue is conveniently calculated using the following equation. Calculated.
tZ = −HT × ln (1-f) / K (7)

here,
f = (Pde-PIN2) / (0.79-PIN2)
It is. Here, HT is the above-mentioned half-saturation time, and Pde is an inert gas partial pressure (hereinafter, referred to as an allowable inert gas partial pressure) regarded as residual inert gas discharge for each tissue, all of which are known. Is the value of PIN2 is a partial pressure of the inert gas in each tissue at the time of floating on the surface of the water, and is a value calculated by the inert gas amount calculation unit 60 in the body. According to the above formula, tZ is calculated for each tissue, and the largest value among them is the inert gas discharge time in the body. The in-vivo inert gas discharge time calculated in this way is displayed in a surface mode as described later.

FIG. 5 is a diagram illustrating a use mode of the diving equipment when the information processing apparatus for divers of the embodiment is used. FIG. 6 is a schematic configuration explanatory view of the diving equipment of the embodiment.
The diving equipment 200 is roughly divided into a cylinder unit 201 having a plurality of cylinders A to D, a switching valve regulator 202, a water depth / residual pressure gauge 203, and a dive computer 100.
The cylinders A to D constituting the cylinder unit 201 are each filled with a mixed gas obtained by mixing two or three types of diving gases, and the mixing ratios thereof are different from each other.
FIG. 7 is an explanatory diagram of an example of the mixing ratio of the diving gas. In the following description, a case will be described where three kinds of oxygen O2, nitrogen N2 and helium He are used as the diving gas.
In the cylinder A, the mixing ratio of oxygen O2 is FO2 = 21%, the mixing ratio of nitrogen N2 is FN2 = 79%, and the mixing ratio of helium He is FHe = 0%, which is the same mixing ratio as ordinary air. . The mixed gas having this mixing ratio can be used up to a depth of about 30 m during dive.

The cylinder B has a mixture ratio of oxygen O2 of FO2 = 15%, a mixture ratio of nitrogen N2 of FN2 = 45%, and a mixture ratio of helium He of FHe = 40%. Used in areas. The mixed gas having this mixing ratio is mainly intended to prevent oxygen poisoning.
The cylinder C has a mixture ratio of oxygen O2 FO2 = 50%, a mixture ratio of nitrogen N2 FN2 = 0%, and a mixture ratio of helium He FHe = 50%. Used in the depth range up to relatively low depths. The mixed gas of this mixing ratio is mainly aimed at preventing nitrogen poisoning.
The cylinder D has a mixing ratio of oxygen O2 FO2 = 70%, a mixing ratio of nitrogen N2 FN2 = 10%, and a mixing ratio of helium He FHe = 20%, and is used during decompression diving. That is, the mixed gas having this mixing ratio is mainly intended to prevent decompression sickness.

The switching valve / regulator 2 switches the mixed gas supplied from the cylinders A to D and sets the pressure of the mixed gas to a predetermined pressure, and a second stage connected to the first stage 202A via a regulator hose 202B. And a stage 202C.
The water depth / residual pressure gauge 203 measures and displays the water depth during diving and the residual pressure (remaining amount) of the cylinder currently used among the cylinders A to D.
FIG. 8 is an external front view of the dive computer 100.
The dive computer 100 of the present embodiment has the following functions.
(1) Calculate and display the diver's depth and dive time while diving.
(2) The amount of inert gas accumulated in the body during diving is measured, and from this measurement result, the time until the accumulated nitrogen in the body is exhausted after rising from the water after diving is displayed.
(3) Based on a preset diving pattern set in advance and an actual diving pattern up to the present, a switching instruction of the switching valve / regulator 2 and a diving pattern after the present to prevent decompression sickness and the like are issued.

Next, the configuration of the dive computer 100 will be described.
As shown in FIG. 5 or FIG. 6, in the dive computer 100, an arm band 100B is connected to a substantially elliptical device main body 100A in the vertical direction in the drawing, and the arm band 100B is used to connect the user's arm similarly to a wristwatch. It is designed to be attached to and used.
The apparatus main body 100A has an upper case and a lower case fixed in a completely watertight state by screws or the like, and incorporates various electronic components (not shown). A display unit 10 (see FIG. 4) having a liquid crystal display panel 16 is provided on the front side of the apparatus main body 100A in the drawing.
Further, an operation section 5 for selecting / switching various operation modes in the dive computer 100 is formed on the lower side of the drawing of the apparatus main body 100A, and the operation section 5 has two push button type switches 105A and 105B. ing. A diving operation monitoring switch 30 using a continuity sensor used to determine whether or not diving has started is configured on the left side of the apparatus main body 100A in the drawing. The diving operation monitoring switch 30 has electrodes 30A and 30B provided on the front side of the apparatus main body 100A in the drawing, and the electrodes 30A and 30B are brought into conduction by seawater or the like, so that the resistance between the electrodes 30A and 30B is reduced. When the value becomes smaller, it is determined that water has entered. However, the diving operation monitoring switch 30 is used only to detect that water has entered and to shift the operation mode of the dive computer 10 to the diving mode, and to detect that diving has actually started. It is not used for That is, in some cases, the arm of the user wearing the dive computer 100 may simply be immersed in seawater, and it is not preferable to determine that diving has started in such a state.

Next, the configuration of the display unit will be described in detail with reference to FIG.
The display surface of the liquid crystal display panel 16 constituting the display unit 2 has seven display areas. In the present embodiment, an example in which the display surface of the liquid crystal display panel 16 has a rectangular shape has been described. However, the present invention is not limited to the rectangular shape, and other shapes such as a circular shape, an elliptical shape, a track shape, and a polygonal shape other than a rectangle may be used. It may be a shape.
On the display surface of the liquid crystal display panel 16, the first display area 111 located on the upper left side of the drawing is the largest among the display areas, and includes a diving mode, a surface mode (time display mode), and a planning mode described later. In the log mode, the current water depth, the current month and day, the water depth rank, and the dive month and day (log number) are displayed, respectively.
The second display area 112 is located on the right side of the first display area 111 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the dive time and the oxygen saturation, the current time, The no-decompression dive time and dive start time (dive time) are displayed.
The third display area 113 is located below the first display area 111 in the drawing, and has a maximum water depth, a body nitrogen discharge time, a diving mode, a surface mode (time display mode), a planning mode, and a log mode, respectively. The safety level and the maximum water depth (average water depth) are displayed.

The fourth display area 114 is located on the right side of the third display area 113 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the no-decompression diving time, the water surface rest time, Temperature and dive end time (maximum water temperature at depth) are displayed.
The fifth display area 115 is located below the third display area 113 in the drawing, and is a power-out-of-capacity warning display section 115A for displaying power-out capacity, and an altitude rank for displaying the altitude rank to which the current altitude of the user belongs. A display unit 115B is provided.
The sixth display area 116 is located on the lower left side of the drawing, and displays the amount of nitrogen in the body (the amount of inert gas in the body) and the amount of oxygen in the body in a bar graph (up to nine lights).
The seventh display area 117 is located on the right side of the sixth display area 116 in the drawing, and indicates whether nitrogen gas (inert gas) tends to be absorbed or discharged when the decompression diving state is reached in the diving mode. An area indicating whether there is an object (indicated by an up-down arrow in the figure), an area displaying “SLOW” for instructing deceleration as one of the ascent rate violation warnings when the ascent rate is too high, and a dive. And a region for displaying "DECO" for warning that decompression diving must be performed.

[6] Operation Next, the operation of the dive computer 1 having the above configuration will be described. FIG. 9 is a diagram schematically illustrating transition of a display screen in various operation modes of the dive computer.
As shown in FIG. 9, the operation modes of the dive computer 1 include a time mode ST1, a surface mode ST2, a planning mode ST3, a setting mode ST4, a diving mode ST5, a log mode ST6, and a cylinder switching condition setting mode ST7.
Hereinafter, various operation modes will be described. The processing in these various operation modes is executed by the control / calculation unit 9 as described above.

[6.1] Time Mode The time mode ST1 is an operation mode in which the switch is not operated, the nitrogen partial pressure in the body is in an equilibrium state, and the mobile terminal is carried on land. In this time mode, the liquid crystal display panel 11 displays the current month, day, current time, and altitude rank, as shown in FIG. 9 (see reference numeral ST1). If the altitude rank = 0, the altitude rank is not displayed. Specifically, in FIG. 9, the current date is December 5, and the current time is 10:06. Particularly, the current time is indicated by a blinking colon (:). Informs the user that the current time is displayed.
When the switch 105A is pressed in the time mode ST1, the mode shifts to the planning mode ST3 as shown in FIG. When the switch 105B is pressed, the mode shifts to the log mode ST6. Further, if the switch 105B is kept pressed for a predetermined time (for example, 5 seconds) while the switch 105A is kept pressed, the mode shifts to the setting mode ST4.

[6.2] Surface mode The surface mode ST2 is a mode in which the user carries the vehicle on land until 48 hours have passed since the last dive, and the dive computer 1 is in a conductive state during the dive after the end of the previous dive. When the diving operation monitoring switch 30 is insulated, the mode automatically shifts to the surface mode ST2. In the surface mode ST2, in addition to the current month and day, the current time, and the altitude rank displayed in the time mode ST1, the internal nitrogen discharge time is displayed as a countdown. However, when the time to be displayed as the body nitrogen discharge time reaches 0 hour and 00 minutes, the display is not displayed thereafter. In the surface mode ST2, the elapsed time after the end of the diving is displayed as the water surface suspension time. In the diving mode to be described later, the surface stop time 202 is set to a non-display state when the next point at which the water depth becomes shallower than 1.5 m is set as the end of the diving and 48 hours after the end of the diving. Become. Therefore, the dive computer 1 enters the surface mode ST2 on land until 48 hours after the dive ends, and thereafter shifts to the time mode ST1.

Specifically, in the surface mode ST2 shown in FIG. 9, it is displayed that the water surface rest time is 1 hour and 13 minutes, that is, 1 hour and 13 minutes have elapsed after the end of the dive. In addition, it is displayed that the amount of nitrogen absorbed in the body by diving so far corresponds to the four marks in the body nitrogen graph, and from this state until the excess nitrogen in the body is exhausted and the equilibrium state is reached. The time, that is, the nitrogen excretion time in the body is 10 hours and 55 minutes.
When the switch 105A is pressed in the surface mode ST2, the mode shifts to the planning mode ST3 as shown in FIG. When the switch 105B is pressed, the mode shifts to the log mode ST6. Further, if the switch 105B is kept pressed for a predetermined time (for example, 5 seconds) while the switch 105A is kept pressed, the mode shifts to the setting mode ST4.

[6.3] Planning Mode The planning mode ST3 is an operation mode in which a guide for the maximum water depth and dive time for the next dive can be input before the dive. In the planning mode ST3, a water depth rank, a non-decompression diving possible time, a water surface pause time, and a graph of nitrogen in the body are displayed. The display of the rank of the water depth rank is sequentially changed every predetermined time. Each depth rank 301 has, for example, each rank of 9 m, 12 m, 15 m, 18 m, 21 m, 24 m, 27 m, 30 m, 33 m, 36 m, 39 m, 42 m, 45 m, and 48 m, and the display is switched every 5 seconds. Has been. In this case, if the mode has shifted from the time mode ST1 to the planning mode ST3, since there is no excessive nitrogen accumulation in the body due to past diving, that is, the initial diving is planned, the display mark of the in-vivo nitrogen graph 3 is When the water depth is 15 m, as shown in FIG. 9 (reference sign ST4), the non-decompression diving time is displayed as 66 minutes. This indicates that no-decompression diving is possible at a water depth of 12 m or more and 15 m or less and less than 66 minutes.

  On the other hand, if the mode has shifted from the surface mode ST2 to the planning mode ST3, as shown in FIG. 9, since it is a repetitive diving plan in which excess nitrogen accumulates in the body due to past diving, the in-vivo nitrogen graph 203 , Four marks are displayed. For example, when the water depth is 15 m, the non-decompression diving time is displayed as 45 minutes. This means that no-decompression diving is possible at a water depth of 12 m or more and 15 m or less and less than 45 minutes. In this planning mode ST3, when the switch 105A is kept pressed for 2 seconds or more while the water depth rank 301 is sequentially displayed from 9 m to 48 m, the mode shifts to the surface mode ST2 as shown in FIG. After the depth rank 301 is displayed as 48 m, the mode automatically shifts to the time mode ST1 or the surface mode ST2. As described above, when there is no switch operation for a predetermined period, the mode automatically shifts to the surface mode ST2 or the time mode ST1, so that the switch operation does not have to be performed each time, which is convenient for the diver. When the switch 105B is pressed, the mode shifts to the log mode ST6.

[6.4] Setting Mode The setting mode ST4 is an operation mode for setting ON / OFF of a warning alarm and setting of a safety level in addition to setting of the current month and day and the current time. In this setting mode ST4, a safety level (not shown), an alarm on / off (not shown), and an altitude rank (not shown) are displayed in addition to the current month, day, current year, and current time. . Of these display items, the safety level can be selected from two levels: a level at which normal decompression calculation is performed and a level at which decompression calculation is performed on the premise that the user moves to a higher rank after dive. It is possible. If there is excessive nitrogen accumulation in the body due to past diving, a nitrogen graph in the body is also displayed. The on / off of the alarm is a function for setting whether or not to sound various warning alarms from the notification device 13. If the alarm is set to off, the alarm does not sound. This is because, in a device such as a diver's information processing device that needs to keep the battery dead as much as possible, power can be consumed for an alarm to prevent the battery from running out inadvertently, which is convenient. The alarm may be turned on when the ascent speed is violated or when the decompression diving is performed.

  In the setting mode ST4, every time the switch 105A is pressed, the setting items are switched in the order of hour, second, minute, year, month, date, safety level, and alarm on / off, and the display of the setting target portion flashes. At this time, when the switch 105B is pressed, the numerical value or character of the setting item changes, and when the switch 105B is kept pressed, the numerical value or character of the setting item changes quickly. Further, if the switch 105A is pressed while the on / off state of the alarm is blinking, the mode returns to the surface mode ST2 or the time mode ST1. When the switches 105A and 105B are simultaneously pressed while the alarm ON / OFF is blinking, the mode shifts to the cylinder switching condition setting mode ST7. If neither of the switches 105A and 105B is operated for a predetermined period (for example, 1 to 2 minutes), the mode automatically returns to the surface mode ST2 or the time mode ST1.

[6.5] Diving Mode The diving mode ST5 is an operation mode during diving, and includes a no-decompression diving mode ST51, a current time display mode ST52, a decompression diving display mode ST53, and a cylinder switching management mode ST54.
In the no-decompression diving mode ST51, information necessary for diving such as the current water depth, dive time, maximum water depth, no-decompression diving time, an inert gas graph in the body, and an altitude rank are displayed.

In the case of the above example, in the non-decompression diving mode ST51 shown in FIG. 9, 12 minutes have elapsed since the start of the diving, and the diver is currently located at a depth of 15.0 m. It indicates that the non-decompression diving can be continued for another 42 minutes. In addition, it is displayed that the maximum water depth up to the present is 20.0 m, and that the current amount of the inert gas in the body is the level at which four marks in the inert gas graph 203 are lit. ing.

  In the diving mode ST5, the rapid ascent causes decompression sickness, so that the ascent speed monitoring means operates. That is, the present ascent rate is calculated every predetermined time (for example, every 6 seconds), and the calculated ascent rate is compared with the ascent rate corresponding to the current water depth. If the speed is higher than that, the alarm device 13 emits an alarm sound (floating speed violation warning alarm) at a frequency of 4 [kHz] for 3 seconds and displays "SLOW" on the liquid crystal display panel 16 so as to reduce the rising speed. And a display of the current water depth are alternately displayed at a predetermined cycle (for example, a one-second cycle) to issue a rising speed violation warning. Further, the vibration generator 38 warns the diver by vibration that the flying speed is violated. Then, when the ascent speed is reduced to a normal level, the ascent speed warning is stopped.

  Further, in the diving mode ST5, when the switch 105A is pressed, the mode shifts to the current time display mode ST52 only while the switch 105A is kept pressed, and the current time and the current water temperature are displayed. Specifically, in the current time display mode ST52 shown in FIG. 9, it is displayed that the current time is 10:18 and the current water temperature is 23 [° C.]. As described above, when the switch operation is performed in the diving mode ST5, the current time and the current water temperature are displayed only for a predetermined period, so that only data necessary for diving is normally displayed on a small display screen. Even if it is configured, it is convenient because the current time and the like can be displayed as needed. Moreover, even in the diving mode ST5, the switch operation is used to switch the display, so that the information desired by the diver can be displayed at an appropriate timing.

  Further, in the state of the diving mode ST5, when the water surface rises to a place where the water depth is shallower than 1.5 m, it is considered that the diving has been completed, and the dive operation monitoring switch 30 is in an insulated state by the dive operation. At this point, the mode automatically shifts to the surface mode ST2. In addition, from the time when the water depth becomes 1.5 m or more to the time when the water depth becomes less than 1.5 m again, as one dive operation, the diving results during this period (date of diving, dive time, maximum water depth, etc.) Are stored in the RAM 54. At the same time, if the ascent speed violation warning described above is given two or more times consecutively during this dive, that fact is also recorded in the diving result.

The dive computer of the present embodiment is configured on the premise of non-decompression diving, but when it is necessary to perform decompression diving, turns on an alarm to that effect, notifies the diver, and sets the operation mode. The process proceeds to the decompression diving display mode ST53.
In the decompression diving display mode ST53, the current water depth, dive time, inert gas graph in the body, altitude rank, decompression stop depth, decompression stop time, and total ascent time are displayed. Specifically, in the decompression diving display mode ST53 shown in FIG. 9, it is displayed that 24 minutes have elapsed since the start of diving and the water depth is 29.5 m. In addition, since the amount of inert gas in the body exceeds the maximum allowable value and is dangerous, an instruction is displayed to ascend to a depth of 3 m while maintaining a safe ascent speed, and stop decompression for 1 minute there. I have. The diver will float after stopping the decompression based on the display content as described above, but during this decompression, a downward arrow indicates that the amount of inert gas in the body tends to decrease. You.

The operation shifts to the cylinder switching management mode ST54 by pressing the switch 105B in the non-decompression diving mode ST51.
The cylinder switching management mode ST54 determines whether or not safety can be ensured when switching from the current diving state (including the mixed gas ratio of the used cylinder) to a new cylinder having a different mixed gas ratio. This is a mode for notifying the diver not to switch if it is determined that safety cannot be ensured when switching to a new cylinder.
FIG. 10 is an explanatory diagram of an example of the display screen in the cylinder switching management mode (when switching is possible).
As shown in FIG. 10A, in the initial state, the current diving state and the gas mixture ratio of the cylinder currently in use are displayed.
Specifically, water depth = 21 m, dive time = 20 minutes, (no decompression) dive time = 20 minutes, oxygen partial pressure = 0.6, gas mixture ratio in the cylinder currently in use (oxygen 21%, helium 50%, 29% nitrogen).

In this state, the switch 105B is repeatedly pressed until the information of the desired switching destination cylinder is displayed, whereby the dive time, the oxygen partial pressure, and the gas mixture ratio in the switching destination cylinder are displayed.
Specifically, as shown in FIG. 10 (B), water depth = 21 m, dive time = 20 minutes, dive time (no decompression) = 21 minutes, oxygen partial pressure = 0.9, gas mixing in the cylinder at the switching destination The ratio (oxygen 21%, helium 50%, nitrogen 29%) will be displayed.
In this state, the diver confirms the contents, and if there is no problem, presses the switch 105A, and the dive computer 4 confirms the safety of using the cylinder at the switching destination, determines that there is no problem, and switches the cylinder. The management mode ST54 ends, and the display shifts to the decompression diving mode ST51.
The dive computer 4 performs an operation based on the information corresponding to the cylinder after switching.
Pressing B shifts.

FIG. 11 is an explanatory diagram of an example of the display screen in the cylinder switching management mode (when switching is not possible).
As shown in FIG. 11A, in the initial state, the current diving state and the gas mixture ratio of the currently used cylinder are displayed.
Specifically, water depth = 10 m, dive time = 35 minutes, decompression diving instruction = 3 m, standby for 15 minutes, oxygen partial pressure = 0.6, gas mixture ratio in the cylinder currently used (oxygen 32%, helium 0 %, Nitrogen 68%).
In this state, the switch 105B is repeatedly pressed until the information of the desired switching destination cylinder is displayed, whereby the dive time, the oxygen partial pressure, and the gas mixture ratio in the switching destination cylinder are displayed.
Specifically, as shown in FIG. 11 (B), the water depth = 10 m, dive time = 35 minutes, decompression diving instruction = 3 m, waiting for 2 minutes, oxygen partial pressure = 1.9, gas mixture ratio in the switching destination cylinder (Oxygen 21%, helium 50%, nitrogen 29%) will be displayed.

In this state, the diver checks the contents, and if there is no problem, presses the switch 105A. In this case, the dive computer 4 checks the safety by using the cylinder at the switching destination. It is determined that there is a risk of oxygen poisoning due to the high oxygen partial pressure, and the operation of the switch 105A is invalidated. Further, an alarm sound is generated by the sound notification device 37, an alarm vibration is generated by the vibration generation device 38, or a warning to that effect is displayed on the liquid crystal display panel.
Further, as shown in FIG. 11C, the dive computer 4 again displays the current diving state and the gas mixture ratio of the currently used cylinder.
The above description has been made in the case where there is a risk of oxygen poisoning. However, if the oxygen mixture ratio is low, the dive computer 4 may be in an oxygen deficiency. The alarm device 37 generates an alarm sound, the vibration generating device 38 generates an alarm vibration, or a warning is displayed on the liquid crystal display panel to prevent the cylinder from being switched.

[6.6] Log Mode The log mode ST6 is a function for storing and displaying various data when diving for more than 3 minutes deeper than 1.5m in the diving mode ST5. Such diving data is sequentially stored as log data for each dive, and a predetermined number (for example, 10 times) of diving log data is stored and held. Here, when diving is performed for more than the maximum number of stored data, the oldest data is deleted and the latest log data is always stored. Note that, even when diving with the maximum number of storages or more is performed, a part of the log data can be retained without being deleted by setting in advance.

  It is possible to shift to the log mode ST6 by pressing the switch 105B in the time mode ST1 or the surface mode ST2. In the log mode ST6, the log data has two mode screens that are switched every predetermined time (for example, 4 seconds). As shown in FIG. 9, in the first log mode ST61, a dive month, an average depth, a dive start time, a dive end time, an altitude rank, and a graph of an inert gas in the body at the time when the dive is ended are displayed. In the second log mode ST62, the log number indicating the number of diving on the day of diving, the maximum water depth, the dive time, the water temperature at the maximum water depth, the altitude rank, the inactivity in the body when the dive is completed The gas graph is displayed. Specifically, as shown in FIG. 9 (refer to symbol ST6), in the state of altitude rank = 0, in the second dive on December 5, diving starts at 10:07 and starts at 10:45. Is displayed, indicating that the dive was for 38 minutes. In the diving at this time, the average water depth is 14.6 m, the maximum water depth is 26.0 m, the water temperature at the maximum water depth = 23 [° C], and after the dive is completed, four marks in the inert gas graph in the body correspond to lighting. This indicates that the generated inert gas has been absorbed into the body.

As described above, in the log mode ST6 of the present embodiment, various information is displayed while automatically switching between the two mode screens, so that the amount of information that can be displayed substantially can be increased even if the display screen is small. , Visibility is not reduced.
Further, in the log mode ST6, every time the switch 105B is pressed, the display is sequentially switched from the new data to the old data, and after the oldest log data is displayed, the mode shifts to the time mode ST1 or the surface mode ST2. Even when a part of the log data among all the log data has been displayed, the switch to the time mode ST1 or the surface mode ST2 can be made by pressing the switch 105B for more than 2 seconds. Further, even when neither of the switches 105A and 105B is operated for a predetermined time (1-2 minutes), the operation mode automatically returns to the surface mode ST2 or the time mode ST1. Therefore, the diver does not need to perform the switch operation, and the usability is improved. When the switch 105A is pressed, the mode shifts to the planning mode ST3.

[6.7] Cylinder switching condition setting mode In the cylinder switching condition setting mode ST7, various settings of cylinder switching timing can be performed.
When performing deep diving or long-time diving, the dive computer 4 stores in advance which of the plurality of cylinders A to D is to be used at which timing in order to perform safe diving. Need to be kept. Therefore, the user of the dive computer 4 selects an item that causes the cylinder switching in the cylinder switching condition setting mode ST7, and inputs the switching condition of the item to the dive computer 4.
FIG. 12 is an explanatory diagram of an example of the switching condition setting table.
As shown in FIG. 12, the following five types of items can be cited as items that cause the cylinder switching.
(1) Diving time (2) Oxygen content in the body (3) Inert gas content in the body (4) Dive time (5) Water depth

In this case, in the present embodiment, ten types of switching conditions corresponding to the setting codes 1 to 10 can be set as the switching conditions corresponding to the item “dive time”. Specifically, there are ten types of diving time 0 to 10 minutes (setting code 1), diving time 11 to 20 minutes (setting code 2), ..., diving time 91 to 100 minutes (setting code 10). I have.
Further, as the switching condition corresponding to the item “intracorporeal oxygen amount”, four types of switching conditions corresponding to the setting codes 11 to 14 can be set. Specifically, one or two bar graphs indicating the oxygen content in the body are turned on (setting code 11), three or four are turned on (setting code 12),..., Seven or eight are turned on (setting code 11). 14).
In addition, as the switching condition corresponding to the item “the amount of inert gas in the body”, five types of switching conditions corresponding to the setting codes 16 to 20 can be set. Specifically, one or two bar graphs indicating the amount of inert gas in the body are turned on (setting code 16), three or four are turned on (setting code 17),..., Seven or eight are turned on ( There are five types: setting code 19) and nine lightings (setting code 20).

Further, as the switching condition corresponding to the item “diveable time”, four types of switching conditions corresponding to the setting codes 21 to 24 can be set. Specifically, there are four types of diving time 200 to 151 minutes (setting code 21), diving time 150 to 101 minutes (setting code 22), ..., diving time 50 to 0 minutes (setting code 24). ing.
Nine types of switching conditions corresponding to the setting codes 25 to 33 can be set as the switching conditions corresponding to the item “water depth”. Specifically, nine types of water depths 10 m to 20 m (setting code 25), water depths 20 to 30 m (setting code 26), ..., water depths 80 to 90 m (setting code 32), and water depths 90 to 100 m (setting code 33) It has become.

FIG. 13 is an explanatory diagram of a setting example of the switching timing.
Next, a specific setting of the switched mining will be described.
As shown in FIG. 13, the cylinder A is used as a cylinder (initial use cylinder) used at the start of diving.
FIG. 14 is an example of a switching timing setting screen for the cylinder A, which corresponds to the item “dive time”.
In the initial state, "initial use" is displayed in the condition display area. Therefore, it is determined that the cylinder A is to be used as the initially used cylinder by simultaneously pressing the switch 105A and the switch 105B.
As a result, the switching timing setting screen for the cylinder B, the cylinder C, and the cylinder D is sequentially displayed on the liquid crystal display panel 16, but all of them are the same. Therefore, the cylinder C will be specifically described as an example. .

The cylinder C satisfies the condition of setting code = 3, satisfies the condition of setting code = 12, satisfies the condition of setting code = 20, and satisfies the condition of setting code = 29, as shown in FIG. Switching is performed when the conditions are satisfied. That is, dive time = 21 to 30 minutes, three or four bar graphs indicating the amount of oxygen in the body are lit, nine bar graphs indicating the amount of inert gas in the body are lit, and a depth of 50 to 50 It can be switched at 60 m.
FIG. 15 is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “dive time”.
In the initial state, "initial use" is displayed in the condition display area, but "21 minutes to 30 minutes" is displayed in the condition display area by pressing switch 105B three times (or switch 105A eight times). You. By simultaneously pressing the switch 105A and the switch 105B in this state, the diving time = 21 to 30 minutes is set as the switching condition in the item “dive time” of the cylinder C.

FIG. 16 is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “in-body oxygen amount”.
In the initial state, “1-2 lights up” is displayed in the condition display area, but “3-4 lights up” is displayed in the condition display area by pressing switch 105B once (or switch 105A four times). Is displayed. By simultaneously pressing the switch 105A and the switch 105B in this state, a state is set in which three or four bar graphs indicating the amount of oxygen in the body are turned on as the switching condition in the item “intracorporeal oxygen amount” of the cylinder C.
FIG. 17 is an example of a switching timing setting screen for the cylinder C, which corresponds to the item “intra-body inert gas amount”.
In the initial state, “1-2 lights up” is displayed in the condition display area, but “9 lights up” is displayed in the condition display area by pressing switch 105A once (or switch 105B four times). Is done. In this state, by simultaneously pressing the switch 105A and the switch 105B, a state is set in which nine bar graphs indicating the amount of inert gas in the body are turned on as the switching condition in the item "amount of inert gas in the body" of the cylinder C. .

FIG. 18 is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “water depth”.
In the initial state, “10-20 m” is displayed in the condition display area, but “50-60 m” is displayed in the condition display area by pressing the switch 105A four times (or the switch 105B four times). . By simultaneously pressing the switch 105A and the switch 105B in this state, the water depth of 50 to 60 m is set as the switching condition in the item “water depth” of the cylinder C.
As described above, in the cylinder switching condition setting mode ST7, the setting can be reliably performed by a simple operation.

Next, a case where an actual diving is performed will be described.
At the time of diving, the dive computer 4 does not dive at exactly the same water depth as the previous simulation, and does not directly notify the dive computer 4 even when it is time to switch the cylinder based on the simulation result.
That is, in order to determine whether or not it is safe to dive at the mixing ratio of the dive gas in the cylinder to be switched next, oxygen partial pressure, no decompression possible time, decompression stop time in the decompression state, The actual decompression stop depth is calculated and displayed on the liquid crystal display panel 16.
Then, based on the information displayed on the liquid crystal display panel 16, the user appropriately selects and switches the mixing ratio of the cylinders.

Next, specific processing of the dive computer at the time of diving will be described.
FIG. 19 is a processing flowchart of the dive computer at the time of diving.
First, the CPU 51 of the dive computer 4 measures the elapsed time from the dive start time based on its own timer (step S31).
Subsequently, water depth measurement is performed (step S32).
Thereby, the CPU 51 calculates the mixing ratio of the diving gas to be used at present (step S33).
Next, the CPU 51 calculates the oxygen partial pressure FO2 (step S34).
Subsequently, the CPU 51 calculates the amount of inert gas in the body (step S35), and calculates the amount of oxygen in the body (step S36).

Subsequently, the CPU 51 determines whether or not the vehicle is in the decompression diving state based on the diving pattern up to the present (step S37).
In the determination of step S37, if the current dive pattern is in the decompression diving state (step S37; Yes), the CPU 51 calculates the decompression stop depth, the decompression stop time, and the total ascent time (step S39), and performs the processing. Move to step S40.
In the determination of step S37, if the current diving pattern is not in the decompression diving state (step S37; No), the CPU 51 calculates the no-decompression possible time (step S38).
As a result, the CPU 51 displays one of the decompression stop depth, the decompression stop time, the total floating time, and the no-decompression possible time on the liquid crystal display panel 16 of the display unit 10 (step S40).

As described above, according to the present embodiment, the mixing ratio of the diving gas of a plurality of cylinders is set according to the diving pattern, and the use timing of each cylinder is simulated before diving. Then, based on the simulation result, the switching timing is set in the dive computer, and in the actual dive, the dive computer notifies the diver of the use timing of the cylinder in consideration of the actual diving pattern, thereby improving the dive safety. It becomes possible.
In addition, during decompression diving, the time and depth required for decompression stop can be simulated in advance for non-decompression diving time with respect to the mixing ratio of each diving gas. The determination can be made reliably.

Furthermore, even during actual diving, the time required for decompression diving with respect to the mixing ratio of the diving gas at the switching destination and the time and depth required for decompression stop at the time of decompression diving are calculated. Can be reliably determined.
In the above description, oxygen, nitrogen, and helium are used as diving gases, but various known diving gases, such as a combination of oxygen, nitrogen, and hydrogen, can be used depending on the diving condition.
Further, in the above description, a case has been described in which three types of diving gas are used, but it is also possible to use four or more types of diving gas.
Furthermore, in the above description, switching of each cylinder is performed by a diver, but it is also possible to configure so as to automatically switch after waiting for a diver's instruction. Needless to say, in this case, it is preferable that a manual switching can be performed in consideration of an emergency. If there is a danger of oxygen poisoning or a possibility of oxygen deficiency, the dive computer will generate an alarm sound by the sound generator, an alarm vibration by the vibration generator, or the LCD panel to indicate that. It is necessary to display a warning and prohibit automatic cylinder switching.

  In the above description, it has been assumed that programs for performing the various operations described above are stored in the ROM 6 in advance. However, the present invention is not limited to this, and a dive computer is connected to a personal computer or a server computer (not shown) via a communication cable or a network, and the program is downloaded from the personal computer or the server computer to the dive computer. Is also good. In this case, the program is stored in a rewritable nonvolatile memory (not shown) in the dive computer. Then, the MPU 1 may read the program from the nonvolatile memory and execute the program.

1 is an overall configuration diagram of a dive computer according to an embodiment of the present invention. It is a detailed block diagram of a dive computer. It is a functional block diagram for realizing the ascent speed monitoring function. It is a functional block diagram for realizing the inert gas amount calculation function of a dive computer. It is a use aspect figure of the diving implement of an embodiment. It is a schematic structure explanatory view of a diving implement of an embodiment. It is explanatory drawing of an example of the mixing ratio of the diving gas filled in each cylinder. FIG. 2 is an external front view of the dive computer 4. It is a figure which shows typically the transition of the display screen in various operation modes of a dive computer. It is explanatory drawing of an example (when switching is possible) of the display screen of a cylinder switching management mode. It is explanatory drawing of an example (when switching is impossible) of the display screen of a cylinder switching management mode. FIG. 9 is an explanatory diagram of an example of a switching condition setting table. FIG. 9 is an explanatory diagram of a setting example of a switching timing. It is an example of a switching timing setting screen for the cylinder A, and corresponds to the item "dive time". This is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “dive time”. This is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “in-vivo oxygen amount”. It is an example of a switching timing setting screen for the cylinder C, and corresponds to the item "internal gas volume". This is an example of a switching timing setting screen for the cylinder C, and corresponds to the item “water depth”. It is a processing flowchart of a dive computer at the time of diving.

Explanation of reference numerals

100: dive computer (divers information processing device), 105A, 105B: switch, 200: diving equipment, 201: cylinder unit, 202: switching valve / regulator, 203: water depth / residual pressure gauge, 1: MPU, 2: display unit , 3 timing unit, 4 pressure sensor, 5 analog / digital converter, 6 ROM, 7 RAM, 8 notification unit, 9 control / calculation unit (flying speed calculating unit, floating speed storage unit, safety Sex determination unit), 10: water pressure / water depth measurement unit, 11: switch operation unit, 12: diving operation monitoring switch, 13: notification device, 14: vibration generator, 15: liquid crystal driver, 16: liquid crystal display panel, 17 ... Control circuit, 18 time counter, 19 frequency divider, 20 oscillation circuit, 21 amplifier circuit, 22 floating speed measurement unit, 23 floating speed reference data, 24 floating Degree violation violation determination unit, 25: diving result storage unit, 26: water temperature measurement unit, 26A: water temperature measurement sensor (temperature measurement sensor), 26B: amplification circuit, 26C: A / D converter, 28: information display unit, 29 ... Notifying section (warning section), 30 warning display section, 31 respiratory gas inert gas partial pressure calculation section, 32 respiratory gas inert gas partial pressure storage section, 33 comparison section, 34 half-saturation time selection section, 35: Intra-body inert gas partial pressure calculation unit, 36: In-vivo inert gas partial pressure storage unit, 37: In-vivo inert gas partial pressure discharge time derivation unit, 38: Diving time derivation unit, PW: Power supply unit, A to D ... cylinder.

Claims (29)

A divers information processing apparatus used to perform diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases,
An oxygen partial pressure calculation / monitoring unit for calculating and monitoring the oxygen partial pressure is provided, and when the operator selects any cylinder to switch to a cylinder having a different mixing ratio of the diving gas, the selected cylinder is An information processing apparatus for divers, wherein when it is determined that there is a possibility of oxygen deficiency or oxygen poisoning, processing is performed to prohibit switching to the selected cylinder. The information processing apparatus for divers according to claim 1,
An information processing apparatus for divers, wherein the cylinder contains oxygen as the diving gas. The information processing apparatus for divers according to claim 1 or 2,
The oxygen partial pressure calculation / monitoring unit is an oxygen partial pressure violation determining unit that determines whether there is a possibility of oxygen poisoning or oxygen deficiency,
When there is a risk of oxygen poisoning or oxygen deficiency, a notification unit that reports that fact,
An information processing device for divers, comprising: The information processing apparatus for divers according to any one of claims 1 to 3,
The operator selects to switch to the same or different cylinder with the same mixing ratio of the diving gas, and if it is determined that the oxygen partial pressure value of the selected cylinder is not likely to cause oxygen deficiency or oxygen poisoning, the selected cylinder is switched to the selected cylinder. An information processing device for divers, which performs a process to permit switching of a diver. The information processing apparatus for divers according to claim 3,
The information processing apparatus for divers, wherein the notification unit displays whether switching of the cylinder is possible, an alarm sound, an EL backlight, or the like. The information processing apparatus for divers according to any one of claims 1 to 5,
A timing section that measures the elapsed time of diving,
A water depth measuring unit for detecting a water depth value,
A diving information storage unit that detects a water depth value by a water depth measurement unit corresponding to a predetermined dive elapsed time, and stores the detected water depth value and the dive elapsed time;
An information processing device for divers, comprising: A divers information processing apparatus used to perform diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases,
A switching condition storage unit for storing a switching condition of each of the cylinders during diving for each of the cylinders;
A switching destination cylinder selecting unit for allowing an operator to select the switching destination cylinder;
A safety determination unit that determines whether there is a risk of oxygen poisoning or oxygen deficiency when it is assumed that the cylinder has been switched,
When the determination result of the safety determination unit is determined that there is a risk of oxygen poisoning or oxygen deficiency, a warning unit that warns that,
An information processing device for divers, comprising: The information processing apparatus for divers according to claim 7,
An information processing apparatus for divers, comprising: a cylinder information presenting section for presenting information on the selected switching destination cylinder. The information processing apparatus for divers according to claim 8,
The divers, wherein the cylinder information presenting unit presents, as information about the switching destination cylinder, a mixing ratio of the diving gas of the switching destination cylinder and diving state information when the cylinder is switched. Information processing device. The information processing apparatus for divers according to claim 9,
The information processing apparatus for divers, wherein the cylinder information presenting unit presents, as the diving status information, a no-decompression diving time or a decompression diving instruction and an oxygen partial pressure. A mixing method of a plurality of types of diving gas is a control method of a divers information processing apparatus used to perform diving using a plurality of cylinders each containing a plurality of mixed gases the same or different,
An oxygen partial pressure calculation / monitoring process for calculating and monitoring the oxygen partial pressure,
When the operator selects any cylinder to switch to the same or different cylinder of the mixing ratio of the diving gas, when it is determined that the selected cylinder is likely to be oxygen deficient or oxygen poisoning, A switching prohibition process of performing processing to prohibit switching to the selected cylinder;
A method for controlling an information processing apparatus for divers, comprising: The control method for a diver's information processing apparatus according to claim 11,
The oxygen partial pressure calculation / monitoring step is an oxygen partial pressure violation determining step of determining whether there is a possibility of oxygen poisoning or oxygen deficiency,
A notification process for notifying that there is a risk of oxygen poisoning or oxygen deficiency,
A method for controlling an information processing apparatus for divers, comprising: The control method for a divers information processing apparatus according to claim 11 or 12,
The operator selects to switch to the cylinder having a different mixing ratio of the diving gas, and switches to the selected cylinder when it is determined that the oxygen partial pressure value of the selected cylinder is not likely to cause oxygen deficiency or oxygen poisoning. A method for controlling an information processing apparatus for divers, characterized in that a process is performed to permit a diver. The control method for a divers information processing apparatus according to claim 12,
The control method of a divers information processing apparatus, wherein the notification step includes displaying whether or not the cylinder can be switched, by displaying an alarm sound, an EL backlight, or the like. A control method for a divers information processing apparatus according to any one of claims 11 to 14,
A timing process to measure the elapsed time of diving,
A depth measurement process for detecting the depth value,
A diving information storage step of detecting a water depth value corresponding to a predetermined dive elapsed time and storing the detected water depth value and the dive elapsed time;
A method for controlling a diver's information processing apparatus, comprising: A mixing method of a plurality of types of diving gas is a control method of a divers information processing apparatus used to perform diving using a plurality of cylinders each containing a plurality of mixed gases the same or different,
A switching condition storing step of storing a switching condition of each of the cylinders during diving for each of the cylinders;
A switching destination cylinder selecting step for allowing the operator to select the switching destination cylinder;
A safety determination step of determining whether there is a risk of oxygen poisoning or oxygen deficiency when assuming that the cylinder has been switched,
When the determination result in the safety determination process is determined to be a possibility of oxygen poisoning or oxygen deficiency, a warning process to warn the user,
A method for controlling an information processing apparatus for divers, comprising: The control method for a divers information processing apparatus according to claim 16,
A method for controlling a diver's information processing apparatus, comprising a cylinder information presenting step of presenting information on the selected switching destination cylinder. The control method for a diver's information processing device according to claim 17,
The divers information presenting step includes presenting, as information on the switching destination cylinder, a mixing ratio of the diving gas of the switching destination cylinder and diving state information when the cylinder is switched. For controlling an information processing apparatus for use. The control method for a divers information processing apparatus according to claim 18,
The method for controlling a diver's information processing apparatus, wherein the cylinder information presenting step presents, as the diving state information, a non-decompression diving time or a decompression diving instruction and an oxygen partial pressure. A control program for controlling, by a computer, a diver's information processing device used to perform diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases. So,
Calculate and monitor oxygen partial pressure,
When the operator selects any cylinder to switch to the same or different cylinders of the mixing ratio of the diving gas, it is determined whether or not the selected cylinder is at risk of oxygen deficiency or oxygen poisoning,
If it is determined that there is a possibility, a process is performed to prohibit switching to the selected cylinder.
A control program characterized by the above-mentioned. The control program according to claim 20, wherein
Determine whether there is a risk of oxygen poisoning or oxygen deficiency based on the oxygen partial pressure,
If there is a risk of oxygen poisoning or oxygen deficiency, let them know.
A control program characterized by the above-mentioned. The control program according to claim 20 or 21,
The operator selects to switch to the same or different cylinder with the same mixing ratio of the diving gas, and if it is determined that the oxygen partial pressure value of the selected cylinder is not likely to cause oxygen deficiency or oxygen poisoning, the selected cylinder is switched to the selected cylinder. A control program for causing a process to be performed so as to permit switching of the control program. The control program according to claim 21,
A control program for notifying whether or not the cylinder can be switched, by displaying an alarm sound, an EL backlight, or the like. In the control program according to any one of claims 20 to 23,
Let me measure the elapsed dive time,
Detect the water depth value,
By detecting a water depth value corresponding to a predetermined dive elapsed time, storing the detected water depth value and the dive elapsed time,
A control program characterized by the above-mentioned. A control program for controlling, by a computer, a diver's information processing device used to perform diving using a plurality of cylinders each containing a plurality of mixed gases having the same or different mixing ratios of a plurality of types of diving gases. So,
Switching conditions of each cylinder during diving are stored for each cylinder,
Let the operator select the cylinder to switch to,
Let it be determined whether there is a risk of oxygen poisoning or oxygen deficiency when assuming that the cylinder has been switched,
If it is determined that there is a risk of oxygen poisoning or oxygen deficiency, a warning will be given.
A control program characterized by the above-mentioned. The control program according to claim 25,
A control program for presenting information on the selected switching destination cylinder. The control program according to claim 26,
A control program for presenting, as information on a cylinder to be switched to, a mixture ratio of diving gas of the cylinder to be switched to and diving state information when the cylinder is switched. The control program according to claim 27,
A control program for causing a non-decompression diving time or a decompression diving instruction and an oxygen partial pressure to be presented as the diving state information. A computer-readable recording medium on which the control program according to any one of claims 20 to 28 is recorded.

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