JPH0718936B2 - Electronic watch with pressure sensor - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic timepiece with a pressure sensor to which functions as an altimeter and a depth gauge are added.

[Conventional example and its problems] Conventionally, a wristwatch having a function of measuring atmospheric pressure or water pressure with a pressure sensor, obtaining the altitude or water depth from the measurement result, and displaying the altitude or water depth has been proposed.

However, this type of display is not limited to displaying altitude or water depth at the measurement point, and is an average ascending or descending speed (hereinafter referred to as average ascending / descending speed) important for pace allocation during mountain climbing, hang gliding, and skin diving. )
Is displayed, and the user knows it by
After examining the altitude difference and the time required to obtain it,
It is necessary for both parties to calculate by themselves, but the work during mountain climbing was extremely troublesome.

[Object of the Invention] The present invention has been made in view of the above circumstances, and is an electronic device with a pressure sensor that can obtain the average lifting speed by only performing an extremely simple operation without requiring the above-mentioned mental calculation. The purpose is to provide a clock.

[Points of the Invention] Using a pressure sensor, the vertical distance from the first point to the second point is obtained, and the time required for the movement between the two points is measured. The gist is that the average ascending / descending speed when automatically moving between the two points is calculated and displayed.

[Embodiment] The present invention will be specifically described below based on an embodiment shown in the drawings. The present embodiment is an application of the present invention to a so-called analog / digital electronic wristwatch (time can be digitally displayed in addition to indicating hands).

Structure FIG. 2 is an external view of this embodiment. Reference numeral 1 in the figure is a watch case, and a pressure sensor 2 is provided in the watch case 1. In this case, a circular opening is formed in the lower portion of the upper surface of the watch case 1, and the circular opening is attached to the upper surface of the pressure sensor 2 so as to be exposed. A display unit 3 having hands and a liquid crystal display device 4 is arranged on the front surface of the watch case 1, and the liquid crystal display device 4 displays time, altitude, water depth, the average ascending / descending speed, and the like. In addition, in this embodiment,
In addition to the crown switch S ₅ , pushbutton switches S ₁ to S ₄ are provided.

FIG. 1 is a block circuit diagram of this embodiment. In the figure, reference numeral 6 is an oscillator circuit, and this output is frequency-divided by a frequency divider circuit 7 into a 1P / S signal, and then applied to an AND gate 14, a time counting circuit 8 and a step motor drive circuit 9. The step motor drive circuit 9 receives the 1P / S signal and drives the step motor 10,
The rotating force of the step motor 10 is applied to the pointer 12 via the train wheel mechanism 11.
To move the needle. The time counting circuit 8 has a second, minute, and hour counter, counts the 1P / S signal, and supplies time information to the CPU 21.

The CPU 21 is a circuit that executes various processes according to a microprogram stored in advance based on a switch input signal from the switch unit 17, and when switching from the time display mode to the pressure gauge mode (this embodiment is a liquid crystal display). Display device 4
It has two modes: a time display mode for displaying time data on the display and a pressure gauge mode that functions as a pressure gauge. ), Sends the signal a to the RS flip-flop 13,
By setting this, the AND gate 14 is opened,
The 1P / S signal from the frequency dividing circuit 7 is introduced as a timing signal for pressure measurement, and conversely, when switching from the pressure gauge mode to the clock mode, the signal b is sent to the RS flip-flop 13 and this is sent. AND Gate 14 by resetting
Closed to prohibit the input of the above 1P / S signal. Also, CPU2
1 is a pressure sensor 2 and an analog-digital conversion circuit for the operation command signal c in synchronization with the introduced 1P / S signal.
The pressure sensor 2 detects the pressure (atmospheric pressure or water pressure) at the point where the device is placed, and the analog / digital conversion circuit 15 detects the detected pressure in kg / kg. It is sent to the CPU 21 after it has been converted into a digital amount in cm ² . In this embodiment, when the digital amount is 1.033 kg / cm ² (1 atm) or less, it automatically functions as an altimeter, and when it is 1.033 kg / cm ² or more, it automatically functions as a water pressure meter. To do.

The RAM 20 is for writing / reading data under the control of the CPU 21, and has various registers described later. The buzzer circuit 19 is a circuit that emits a buzzer sound under the control of the CPU 21 when a preset altitude difference or water depth difference is detected. The liquid crystal display device 4 is a device for displaying the data sent from the CPU 21, and displays the current time in the time display mode, the altitude, the water depth or the average ascending / descending speed in the pressure gauge mode.

FIG. 3 shows the main structure of the RAM 20. The register P is a register that stores the pressure (atmospheric pressure or water pressure) at the local point measured at each measurement timing in the pressure gauge mode, and the register P ₀ is a point serving as a reference of altitude or water depth. It is a register that stores the pressure at (hereinafter referred to as a reference point). The register P _H is a register that stores the relative altitude (hereinafter, referred to as a relative altitude) of the local point with respect to the reference point every moment, and the register P _W
Is a register that keeps track of the relative water depth of the local point with respect to the reference point (hereinafter referred to as the relative water depth). Then, the memory AL sets a constant altitude or water depth (hereinafter referred to as an up / down alarm distance) so that a buzzer sounds when a constant altitude or water depth change occurs. The register P ′ _H is a register that stores the relative altitude at that point each time there is a change in altitude only by the above-mentioned elevation alarm distance. On the other hand, the register P ′ _W is at the water depth. It is a register that stores the relative water depth at that point each time there is only a change in the elevation alarm distance. Also, memory H _MAX and memory H
_MIN is a memory for storing the maximum and minimum relative altitude, respectively, and memory W _MAX and memory W _MIN are memory for storing the maximum and minimum relative water depth, respectively. Memory TM
Is a memory that stores the elapsed time from the time when the measurement of altitude and the like is started, every moment. The value set in the above memory or register is kg / c when it is pressure.
The unit is m ² or m for distance. The mode flag M is set in the pressure gauge mode,
It is a flag that is unloaded in the time display mode.
F _P is a flag that is set when the present embodiment functions as a depth gauge in the pressure gauge mode and is lowered when it functions as a altimeter. State counter N is 3
When the value is 0 on the advance counter, the measurement state for displaying data such as atmospheric pressure and water pressure on the liquid crystal display device 4 is designated,
When 1, the memo display state for displaying the maximum or minimum relative altitude and the like is designated, and when 2, the set state for setting the elevation alarm distance is designated. Further, the display counter A is
In the measurement state (that is, when the state counter N is 0), the measurement data type to be displayed is designated, and in the memo display state (that is, when the state counter N is 1), the display data type is designated. To do.

Operation Next, the operation of this embodiment will be described. FIG. 4 is a general flow chart showing the outline of the operation. That is,
It is determined whether or not there is a switch input from the switch unit 17 or a 1P / S signal which is a timing signal for pressure measurement (step S1). If neither is present, display processing for displaying time on the liquid crystal display device 4 (step S3). ) Is executed, and the process returns to step S1. However, if the switch input is detected in step S1, the corresponding switch processing (step S2) is executed, and if the 1P / S signal is detected,
Measurement process for measuring atmospheric pressure or water pressure (step S4)
Is executed, and then a display process (step S3) for displaying the measurement data and the like on the liquid crystal display device 4 is performed.
Return to S1.

FIGS. 5, 6, and 7 are flowcharts showing the above switch processing (step S2), measurement processing (step S4), and display processing (step S3) in detail, and FIG. 7 shows a transition of display on the liquid crystal display device 4 accompanying a switch operation. The operation when each switch is operated will be described below.

(1) Operation at the time of initial operation It is assumed that the liquid crystal display device 4 is in the time display mode as shown in FIG. 8A and the current time (10:58:59) is displayed. Here, when operating the push button switch S _3, and detects that a switch input in step S1 of FIG. 4, enters the flow chart of the switch processing i.e. FIG. 5 step S2, its switch input in step S10 detects that is due to the push button switch S _3, make sure that it is still time display mode (step
S11), and then the mode flag M is set to switch to the pressure gauge mode (step S12). Then, the operation command signal c is sent to the pressure sensor 2 and the analog-digital conversion circuit 15, the pressure at the site point is measured, and this is set in the register P ₀ as the initial pressure, that is, the pressure at the reference point (step S13). In addition, the signal a is emitted and RS flip
It is a pressure measurement timing signal with flop 13 set.
The introduction of the 1P / S signal is started (step S14). Further, the state counter N is set to 0 to specify the measurement state, and the display counter A is set to 0 to specify the relative altitude display state (the state displaying the relative altitude or the relative water depth) (step.
S15). That is, when the time display mode is switched to the pressure gauge mode, the relative altitude display state of the measurement state is automatically designated. Then step S16, S17 in the register _{P 'H, P' W,} memory _{H MAX, H MIN, W MAX} , W
Initialization of _MIN and memory TM is performed.

After the above switch processing (step S2 in FIG. 4), the display processing (step S3 in FIG. 4, that is, the flowchart in FIG. 7) is started, and it is confirmed that the pressure gauge mode is already set (step D1). Then, it is confirmed that the measurement state is designated (step D3), and further that the relative altitude display state is designated (step D4), and the process proceeds to step D5. In this step, now how the device is used as a depth gauge, to determine that used as an altimeter, lest i.e. relative altitude or relative register P _H or P _W corresponding according to the determination result The water depth is displayed on the liquid crystal display device 4 (steps D6 and D8). But,
In this case, since the initial operation is in progress at the reference point, there is still no difference in altitude or water depth, and the relative altitude is 0. After that, the process proceeds to step D7 or D9, and a process of blinking a triangular mark on the right end portion of the display panel of the liquid crystal display device 4 is performed to display that the measurement state is set.

After the above process, the elevator alarm setting state is set in order to set the elevator alarm distance described above. In this case, the 8th alarm is set.
The push button switch S ₂ is operated as shown in the figure. At this time, the operation is detected in step S32 in FIG. 5, the state counter N is set to 2 (step S33), and the up / down alarm is set. Then, the display process is started. Step D6
After step 1, in step D62 the above-mentioned triangle mark lights up and SET
Is displayed.

Here, the lift alarm distance is set by the set-and-select method in which the pushbutton switches S ₁ and S ₄ are operated. In this case, the process goes to step S52 and the lift alarm set process is executed to write the set value to the memory AL. To be done. Then, after that, the display processing is started, and the set up / down alarm distance and the like are displayed (steps D61, D62).

After the above initial setting is completed, the set state is returned to the measurement state. In this case, the push button switch S ₂ is operated as shown in FIG. At this time, the operation is detected in step S50, the process proceeds to step S51, and the state counter N is set to 0 to set the measurement state. After that, enter the display process, and confirm that it is already in the measurement state in step D3,
After steps D4 and D5, the process proceeds to step D6 or step D8 to blink the above-mentioned triangular mark and return to the display state before switching to the set state.

With the above initial operations, the setting of basic data required for the subsequent processing is completed, and the device can be used as an altimeter or a depth gauge.

(2) Measurement operation When the transfer of the measurement point is started in the above-mentioned state, that is, when the device is carried and the mountain climbing or the skin diving is started, the measurement process is executed every one second (step S4). And the following operation is performed in the display process (step S3). That is, first, the operation command signal c is sent to the pressure sensor 2 and the analog-digital conversion circuit 15,
These operations are performed, and the momentary pressure (atmospheric pressure or water pressure) is measured, and the measurement result, that is, the pressure at the site point is set in the register P (step M1).
And the pressure set in this register P is 1.033 kg / cm ²
It is determined whether the pressure is lower or higher than (1 atm), and it is determined whether this device is currently used as an altimeter or a water depth meter (step M2). When the value of the register P is 1.033 or less and it is determined that the register P is used as an altimeter, the flag F _P is lowered (step M3) and the process proceeds to step M4. This step M4
Then, the value of the register P and the atmospheric pressure of the reference point previously set in the register P ₀ are read out, the calculation according to the following formula is executed, and the height from the reference point to the local point is calculated. , That is, the relative altitude is obtained and stored in the register P _H.

Relative altitude (m) = 18410.0 × (log1013.25-logP ′) where P ′ = 9.80665 × 10 ² × (A + 1.033-B) A = Atmospheric pressure at the local point (kg / cm ² ) B = Atmospheric pressure at the reference point (Kg / cm ² ) On the other hand, if it is determined in step M2 that the water meter is used as a depth gauge, a flag F _P is set (step M11), and the process proceeds to step M12. In this step M12, the value of the register P and the value of the register P ₀ are read out, the calculation according to the following formula is executed to obtain the depth from the reference point to the local point, that is, the relative water depth, and this is registered in the register. The process of storing in P _W is performed.

However, A = water pressure at the local point (kg / cm ² ) B = water pressure at the reference point (kg / cm ² ) When used as either an altimeter or a water depth gauge, the above-mentioned relative altitude or relative water depth memory processing After (step M4 or M12), the elevator alarm process described below (steps M5 to M1 when used as an altimeter)
0, steps M13 to M1 when used as a depth gauge
8) Enter. That is, when it is used as an altimeter, it is first checked whether or not there was an ascent / descent alarm distance (buzzer sound) before climbing or descending for the ascent / descent alarm distance (step M5). If so, determine whether it is an uphill or a downhill (step
M6). For climbing, the previous register P to update the contents of the 'value obtained by adding the lift alarm distance on the content of _H (i.e., relative altitude at the time) in the register P' _H (step M7), a buzzer circuit 19 allowed to generate the a sound is (step M8), in case of the downlink, the register P _'H so far
The value obtained by subtracting the lifting alarm distance from the contents of (i.e., relative altitude at the time) to update the contents of the register P _'H (step M9), allowed to generate B sound to the buzzer circuit 19 (step M10). Also, when used as a water depth gauge, substantially the same operation is performed. That is, it is further checked whether there is diving or ascent of the ascent / descent alarm distance (step M13), and if there is any, it is checked whether it is diving or ascent (step M14), and the update processing corresponding to each is performed. performed to the register P _'W (step M15, M17), then (when diving) a sound buzzer circuit 19 or B tone (when flying) allowed to generate (step M16, M18).

After the lifting alarm processing described above, it is recorded in the memory TM that one more second has elapsed from the previous measurement timing regardless of whether or not there is a movement of the lifting alarm distance (that is, regardless of whether or not there is a sound alarm) (step M21). ), And the next maximum and minimum storage process (steps M22 to M30) is entered. In the maximum / minimum storage processing, first, it is determined whether the altimeter or the depth gauge is currently used (step M2).
2). In the former case, the maximum relative altitude in the stroke after the start of measurement is compared with the relative altitude at the local point, and if the relative altitude at the local point is higher, the contents of memory H _MAX are updated with that value (step M23 , M24), and then compares the minimum relative altitude in the stroke after the start of measurement with the relative altitude at the local point, and if the relative altitude at the local point is lower, updates the contents of memory H _MIN with that value. (Steps M25, M26). On the other hand, in the latter case, that is, when it is used as a depth gauge,
Similarly, the maximum relative water depth and the minimum relative water depth are stored in the memory W _MAX and the memory W _MIN , respectively (steps M27 to M30).

After the above processing, the display processing is started, and the process proceeds to Step D5 through Steps D3 and 4, and it is judged whether it is currently used as an altimeter or a water depth gauge, and based on the result, the local point is determined. Is displayed on the liquid crystal display device 4 (step D6 or D8), and the process of blinking the triangular mark is performed (step D7 or
D9). FIG. 8B is a display example at this time.

(3) In the condition of displaying altitude display changes in measurement condition relative, when operating the push button switch S _4, as shown in FIG. 8, the absolute height is displayed.

At this time, the above-described operation is detected in step S22, and the increment processing for incrementing the display counter A by 1 is executed (step S23), and the value is set to 1. Then, after confirming that the value of the display counter A is 1 in step S24, it is determined in step S25 whether or not this device is currently used as a depth gauge. When it is used as an altimeter instead of as a water depth gauge, it is confirmed in step S27 that the value of the display counter A has not reached 4, and the display processing is started. Further, in step S25, when it is used as a depth gauge, the value of the display counter A is set to 0.
Therefore, forcibly set to 2 and avoid setting to 1. That is, when used as a depth gauge, the absolute depth is not displayed.

It is judged that it is used as an altimeter, and the display counter A
When the display process is started by keeping the value of 1 at 1, it is detected at step D4, and the process goes to step D11 to calculate the absolute altitude (above sea level) from the atmospheric pressure at the local point stored in the register P. Then, the calculation result is displayed on the liquid crystal display device 4 (step D12), and the above-mentioned blinking process of the triangular mark is performed (step D13). For example, the sea level at the local point is 168
When it is 1 meter, the display is as shown in Fig. 8 (c).

Next, the operation of displaying the local pressure on the liquid crystal display device 4 will be described. At this time, as shown in FIG. 8, the push button switch S ₄ is further operated in the display state of the absolute altitude. In this case, the operation is performed in step S22.
In step S23, the display counter A is incremented by 1 (step S23).
After that, the process proceeds to step S27. Further, as described above, when used as a water depth gauge, the value of the display counter A does not become 1 but the display counter A is 0, and the push button switch S ₄ is operated once while the relative water depth is being displayed. Only by doing so, the display counter A becomes 2 and the process goes to step S27. As described above, when the display counter A is set to 2 and the process reaches step S27, the display process is started in any case, and the process proceeds from step D4 to step D15. Then, in this step D15, it is judged whether it is used as an altimeter or a water depth meter, and when it is used as an altimeter, the pressure at the local point set in the register P is set in millibar (mb). The processing for converting to atmospheric pressure is performed, the result is displayed on the liquid crystal display device 4 (steps D16 and D17), and further the processing for blinking the above-mentioned triangular mark on the right end of the liquid crystal display device 4 is executed ( Step
D18). FIG. 8 (d) shows a display example at this time. On the other hand, when it is used as a water depth gauge, the water pressure (kg / cm ² ) set in the register P is displayed on the liquid crystal display device 4 (step D20), and the triangular mark blinks (step D21). .

When the push button switch S ₄ is operated in the pressure display state as described above, the average lifting speed is displayed on the liquid crystal display device 4, as shown in FIG. In this case, the switch operation is detected in step S22, the display counter A is set to 3 (step S23), and the display processing is started via steps S24 to S27. And in the display process, steps
After confirming that the value of the display counter A is 3 at D4, the process proceeds to step D25. Then, in step D25, altimeter, to determine that used either as a depth gauge, when used as an altimeter, local points set in the register P _H relative altitude, memory TM The average ascending / descending speed is calculated by dividing by the elapsed time from the start of pressure measurement set in (that is, the time from the time of departure from the reference point) (step D26), and the calculation result is displayed and the triangle mark A blinking display is performed (steps D27, D28). When used as a water depth meter, the relative water depth at the local point set in the register P _W is divided by the time set in the memory TM to calculate the average ascent / descent speed (step D30), The calculation result is displayed and the triangular mark is displayed in blinking (steps D31, D3).
2). FIG. 8 (e) is a display example in this case.

When the push button switch S ₄ is operated in the state of displaying the average ascending / descending speed as described above, the display state such as the relative altitude is returned to as shown in FIG. In this case, pushbutton switch
The operation of S ₄ is detected in step S 22 and + is displayed on the display counter A.
The increment processing of 1 is executed, the value of the display counter A is set to 4 (step S23), and the process proceeds to step S28 through steps S24 and S27 to set the value of the display counter A to 0. After that, the display processing is started, and the process proceeds to steps D4 and D5 to display the relative altitude and the blinking of the triangular mark (steps D6, D7, D8 and D9).

As described above, in the measurement state, each time the push button switch S ₄ is operated, the measurement data and the like at the local point are sequentially and cyclically displayed on the liquid crystal display device 4.

(4) Switching to memo display state The memo display state in which the record after the start of measurement is displayed can be switched only from the above-mentioned measurement state. This switching can be performed by pressing the push button switch S ₁ as shown in FIG. This is done by operating. In this case, the operation is detected in step S30, the state counter N is set to 1 (step S31), and then the process proceeds to the display process. Then, in step D35, after confirming that the value of the state counter N has already become 1, the process proceeds to step D36 and is distributed to various processes according to the value of the display counter B. If the display counter B is set to 0, the measurement time memo display state is set. That is, proceed to step D37,
After the start of measurement, that is, the elapsed time after the start of mountain climbing or the like is read from the memory TM, displayed on the liquid crystal display device 4 (step D37), and the triangular mark is lit (step D3
8). FIG. 8F is a display example in this measurement time memo display state.

(5) When operating the push button switch S ₄ in the display state of the display change described in the memo display state, as shown in FIG. 8, the maximum measured value to display the maximum relative altitude or maximum relative depth in the liquid crystal display device 4 The memo is displayed. In this case, the operation is detected in step S41, the value of the display counter B is set to 1 (step S42), it is confirmed in step D36, and the process proceeds to step D40. In this step, it is judged whether it is used as an altimeter or a water depth meter, and when it is used as an altimeter, the maximum relative altitude of the register H _MAX and the triangular mark are lit (step D41). , D42). On the other hand, when it is used as a water depth meter, the maximum relative water depth of the register W _MAX and the lighting of the triangle mark are displayed (step
D45, D46). Note that FIG. 8 (g) is a display example in this case.

When the push button switch S ₄ is further operated in the above display state, as shown in FIG. 8, a minimum measured value memo display state is displayed in which the minimum relative altitude or the minimum relative water depth is displayed on the liquid crystal display device 4. In this case, the operation is detected in step S41, the value of the display counter B is set to 2 (step S42),
Display processing is started via step S43, and it is detected in step D36 that the value of the display counter B has already become 2.
Go to step D50. In this step, now we have an altimeter,
When it is used as an altimeter, the minimum relative altitude of the memory H _MIN and the triangular mark are lit (steps D51, D52), while the water depth is being used. When it is used as a meter, the minimum relative water depth of the memory W _MIN and the lighting of the triangular mark are displayed (steps D55, D56). FIG. 8 (h) is a display example at this time, and shows that the minimum relative altitude is -5 meters. The minus in this case indicates that the altitude is lower than the altitude of the reference point.

When the push button switch S ₄ is further operated in the above display state, the display returns to the display of the measurement time as shown in FIG. In this case, the operation is detected in step S41, and the value of the display counter B is set to 3 (step S42).
After confirming this in 3), the value of the display counter B is set to 0 (step S44), and the display process is started to display the measurement time (steps D36, D37, D38).

As described above, in the memo display state, pushbutton switch S ₄
Each time the is operated, the measurement time, the maximum measurement value, and the minimum measurement value at that time are sequentially and cyclically displayed on the liquid crystal display device 4.

(6) Switching from the memo display state to the measurement state By operating the push button switch S ₁ as shown in FIG. At this time, in step S45, the operation is detected, the state counter N is set to 0 (step S46), then the display process is started, and the process is divided into various processes according to the value of the display counter A through steps D3 and D4. The result is displayed on the liquid crystal display device 4.

(7) Switching to time display mode As shown in FIG. 8, the push button switch S ₃ is operated after the measurement state or the memo display state is set. In this case, in step S10, the operation is detected, it is confirmed in step S11 that the time display mode is not yet set, and further, it is confirmed that it is not in the set state, that is, in the measurement state or the memo display state ( In step S60), 0 is set in step M to set the time display mode (step S61). And RS
A process for sending the signal b to the flip-flop 13 and resetting it is performed (step S62), and thereafter, a display process is started and a process for displaying the current time from the time counting circuit 8 on the liquid crystal display device 4 is executed. (Step D2).

When the switch operation is performed after switching to the time display mode, the corresponding process is performed in step S58, and the time after the process is displayed in step D2.

The present invention is not limited to the above embodiments, and various modifications can be applied without departing from the present invention.

[Effects of the Invention] As described in detail above, the present invention uses the pressure sensor to obtain the vertical distance from the first point to the second point, and at the same time, the movement between the two points is required. By measuring time and automatically calculating and displaying the average ascent / descent speed when moving between the above two points from these data, the above-mentioned average ascent / descent speed can be obtained by performing a very simple operation. It is possible to provide an electronic timepiece with a pressure sensor that can be known by.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is a block circuit diagram of this embodiment, FIG. 2 is an external view of this embodiment, and FIG. FIG. 4 is a diagram showing a partial configuration of RAM, FIG. 4 is a general flow chart showing an outline of the operation, FIG. 5 is a flow chart showing the switch process of FIG. 4 in detail, and FIG. 6 is a measurement process of FIG. 4 in detail. The flowchart shown in FIG. 7, FIG. 7 is a flowchart showing the display process of FIG. 4 in detail, and FIG. 8 is a view showing the transition of the display accompanying the switch operation. 1 ... watch case, 2 ... pressure sensor, 3 ... display part,
4 ... Liquid crystal display device, 6 ... Oscillation circuit, 7 ... Dividing circuit, 8 ... Time counting circuit, 13 ... RS flip-flop, 14 ... AND gate, 15 ... Analog-digital conversion circuit, 17 ... Switch, 19 ... Buzzer circuit, 20 ...
... RAM, 21 ... CPU, N ... Status counter, A, B, C ...
… Display counter.

Claims (1)

[Claims] 1. A pressure sensor, a vertical distance calculating means for calculating a vertical distance from a first point to a second point based on a pressure detected by the pressure sensor, and a second distance from the first point.
Measurement means for measuring the time to reach the point, and calculation means for calculating an average ascent or descent speed from the vertical distance calculated by the vertical distance calculation means and the measurement time of the measuring means. An electronic watch with a pressure sensor characterized by.