JP6449630B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device, and more particularly to an alarm device including a gas detection unit capable of detecting a plurality of gases.

  Conventionally, an alarm device including a gas detection unit capable of detecting a plurality of gases is known (for example, see Patent Document 1).

  Patent Document 1 discloses a portable gas alarm device including four gas sensors, a display unit on which detection results of the four gas sensors are simultaneously displayed, and a gas detection notification mechanism for notifying a user of gas detection. It is disclosed. In this portable gas alarm device, the detection results of the four gas sensors are simultaneously displayed in a display area having substantially the same size on the display unit.

JP 2009-281982 A

  However, in the portable gas alarm device described in Patent Document 1, the detection results of the four gas sensors are simultaneously displayed in the display area having substantially the same size. For example, the concentration of a predetermined gas is not problematic. Even in an environment where the necessity of recognizing the concentration is clearly low, the detection result of the predetermined gas is also displayed on the display unit. For this reason, it is considered that there is a problem that it is difficult for the user to recognize the gas detection result that is highly necessary to recognize the concentration.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to make it easy for a user to recognize a detection result of a display target gas that is highly necessary to make the user recognize the concentration. Is to provide an alarm that can.

An alarm device according to a first aspect of the present invention includes a gas detector that can detect a plurality of gases, and a display that can be displayed in a first display state that simultaneously displays detection results of the plurality of gases. comprising a part of the gas of the plurality of gases, the concentration of the predetermined gas, Oite the case exceeds the first range is a range not to exceed the alarm threshold, the detection result of the predetermined gas Is configured to be switched to a second display state in which the detection result of the display target gas other than the predetermined gas is displayed on the display unit without being displayed on the display unit.

In the alarm device according to the first aspect of the present invention, as described above, when the concentration of the predetermined gas exceeds the first range, the detection result of the predetermined gas is not displayed on the display unit but other than the predetermined gas. The detection result of the display target gas is switched to a second display state in which the display result is enlarged and displayed on the display unit. As a result, if the concentration of the predetermined gas exceeds the first range and it is less necessary for the user to recognize the concentration by indicating the detection result of the predetermined gas, the predetermined gas is not displayed. Since the detection result of the target gas can be enlarged and displayed on the display unit, it is possible to easily recognize the detection result of the display target gas that is highly necessary for the user to recognize the concentration .

An alarm device according to a second aspect of the present invention includes: a gas detector that can detect a plurality of gases; and a display that can be displayed in a first display state that simultaneously displays detection results of the plurality of gases. And at least one of the case where the concentration of the predetermined gas, which is a part of the plurality of gases, exceeds the first range, and the case where the user selects a gas other than the predetermined gas as the display target gas In this case, the detection result of the predetermined gas is not displayed on the display unit, and the detection result of the display target gas other than the predetermined gas is switched to the second display state enlarged and displayed on the display unit. When the gas concentration in the second range falls within the second range, the detection result of the predetermined gas in addition to the detection result of the display target gas is returned to the first display state displayed on the display unit. ing.
In the alarm device according to the second aspect of the present invention, as described above, when the concentration of the predetermined gas exceeds the first range, the detection result of the predetermined gas is not displayed on the display unit, but other than the predetermined gas. The detection result of the display target gas is switched to a second display state in which the display result is enlarged and displayed on the display unit. As a result, if the concentration of the predetermined gas exceeds the first range and it is less necessary for the user to recognize the concentration by indicating the detection result of the predetermined gas, the predetermined gas is not displayed. Since the detection result of the target gas can be enlarged and displayed on the display unit, it is possible to easily recognize the detection result of the display target gas that is highly necessary for the user to recognize the concentration. Further, when the user selects a gas other than the predetermined gas as the display target gas, the display target gas is determined to have a high necessity for the user to recognize the concentration by switching to the second display state. It is possible to make the user easily recognize the detection result. In addition, when the concentration of the predetermined gas not displayed on the display unit is increased to such a level that the user needs to recognize it within the second range, the detection result of the predetermined gas is displayed on the display unit. Therefore, it is possible to recognize a detection result of a predetermined gas whose necessity for causing the user to recognize the concentration has increased to some extent.
An alarm device according to a third aspect of the present invention includes a gas detector that can detect a plurality of gases, and a display that can be displayed in a first display state that simultaneously displays detection results of the plurality of gases. And at least one of the case where the concentration of the predetermined gas, which is a part of the plurality of gases, exceeds the first range, and the case where the user selects a gas other than the predetermined gas as the display target gas In this case, the detection result of the predetermined gas is not displayed on the display unit, and the detection result of the display target gas other than the predetermined gas is switched to the second display state in which the detection result is enlarged and displayed on the display unit. The unit is composed of a plurality of segments, includes a plurality of display areas for displaying the detection results of each of the plurality of gases, and the number of display target gases can be enlarged and displayed by combining the plurality of segments in the display areas. In the case of the following, when the display state is switched to the second display state and the second display state is maintained, the number of display target gases exceeds the number that can be enlarged by combining a plurality of segments in the display region. Is configured to switch to the second display state only during the second time period.
In the alarm device according to the third aspect of the present invention, as described above, when the concentration of the predetermined gas exceeds the first range, the detection result of the predetermined gas is not displayed on the display unit but other than the predetermined gas. The detection result of the display target gas is switched to a second display state in which the display result is enlarged and displayed on the display unit. As a result, if the concentration of the predetermined gas exceeds the first range and it is less necessary for the user to recognize the concentration by indicating the detection result of the predetermined gas, the predetermined gas is not displayed. Since the detection result of the target gas can be enlarged and displayed on the display unit, it is possible to easily recognize the detection result of the display target gas that is highly necessary for the user to recognize the concentration. Further, when the user selects a gas other than the predetermined gas as the display target gas, the display target gas is determined to have a high necessity for the user to recognize the concentration by switching to the second display state. It is possible to make the user easily recognize the detection result. In addition, when the detection result of the display target gas can be enlarged and displayed at the same time, it is highly necessary to make the user recognize the concentration by magnifying the detection result of the display target gas and maintaining the enlarged display. The detection result of the target gas can be easily recognized. Further, when the detection result of the display target gas cannot be enlarged and displayed at the same time, the detection result of the display target gas is enlarged and displayed for the period of the second time so that the user can easily recognize the detection result of the display target gas. On the other hand, after the period of the second time has elapsed, the detection results of all the gases to be displayed can be simultaneously recognized by the user by simultaneously displaying the detection results of all the gases including the display target gas on the display unit.

In the alarm device according to the first, second, or third aspect, preferably, when the concentration of the detected predetermined gas exceeds the first range for the first time or when the predetermined number of detections continues, The display state is switched to 2. With this configuration, it is possible to switch to the second display state after sufficiently confirming that the user is not required to recognize the concentration of the predetermined gas. Thus, it is possible to prevent the detection result of the gas having a high necessity of recognizing the concentration from being displayed on the display unit.

  According to the present invention, as described above, it is possible to easily recognize the detection result of the display target gas that is highly necessary for the user to recognize the concentration.

It is the perspective view which showed the alarm device by one Embodiment of this invention. It is the block diagram which showed the structure of the alarm device by one Embodiment of this invention. It is the figure which showed the state which turned on all the segments in the display part of the alarm device by one Embodiment of this invention. It is the figure which showed the 1st display state in the display part of the alarm device by one Embodiment of this invention. It is the figure which showed the 2nd display state by which the detection result of 1 type of gas in the display part of the alarm device by one Embodiment of this invention is expandedly displayed. It is the figure which showed the 2nd display state by which the detection result of two types of gas in the display part of the alarm device by one Embodiment of this invention is expanded and displayed simultaneously. It is the figure which showed the 2nd display state by which the detection result of two types of gas in the display part of the alarm device by one Embodiment of this invention is expanded and displayed simultaneously. It is the figure which showed the alarm display state in the display part of the alarm device by one Embodiment of this invention. It is the figure which showed the display control processing flow in the alarm device by one Embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  First, with reference to FIG. 1 and FIG. 2, the whole structure of the alarm device 100 by one Embodiment of this invention is demonstrated.

The alarm device 100 according to an embodiment of the present invention includes four types of gases (combustible gas (COMB), oxygen (O ₂ ), hydrogen sulfide (H ₂ S), and carbon monoxide (CO)). It is a gas alarm that can detect This alarm device 100 is portable and is driven by a battery (not shown).

  As shown in FIG. 1, the alarm device 100 includes a portable alarm device body 1, a sensor unit 2 provided on the lower side (Z2 side) of the alarm device body 1, and the front surface of the alarm device body 1. The display part 3, the LED part 4, the alarm lamp part 5, and the operation part 6 provided in the side (X1 side) are provided. Further, as shown in FIG. 2, a buzzer unit 7, a control unit 8, and a storage unit 9 are arranged inside the alarm device main body 1. The sensor unit 2 is an example of the “gas detection unit” in the present invention.

The alarm device main body 1 has a rectangular parallelepiped external shape as shown in FIG. The sensor unit 2 includes a contact combustion type combustible gas sensor 21 that detects combustible gas, a constant potential electrolytic CO sensor 22 that detects carbon monoxide, and a constant potential electrolytic type H sensor that detects hydrogen sulfide. and ₂ S sensor 23, and an _{O 2} sensor 24 galvanic cell type for detecting oxygen. As a result, the sensor unit 2 is configured to be able to detect a plurality (four types) of gases. The four sensors 21 to 24 are respectively disposed inside four gas detection ports 2a provided on the lower side (Z2 side) of the alarm device body 1 so as to be arranged in the Y direction.

  Here, among the four kinds of gases, the combustible gas, hydrogen sulfide, and carbon monoxide have a greater risk as the concentration increases, while oxygen has a concentration lower than a predetermined concentration. Therefore, the danger increases.

  The display unit 3 has a rectangular shape that is long in the horizontal direction (Y direction) when viewed from the X1 side. The display unit 3 is provided with a backlight 3a (see FIG. 2) for enabling the display on the display unit 3 to be confirmed even in a dark place.

The LED unit 4 is provided below the display unit 3 (Z2 side). In this LED unit 4, LEDs 41 to 44 having four different colors are arranged in the Y direction. Specifically, in the LED unit 4, from the Y1 side toward the Y2 side, the flammable gas LED 41 corresponding to the flammable gas, the CO LED 42 corresponding to the carbon monoxide, and the H ₂ S corresponding to hydrogen sulfide. The LED 43 and the O ₂ LED 44 corresponding to oxygen are arranged in this order. In addition, LED of the color corresponding to combustible gas, oxygen, hydrogen sulfide, and carbon monoxide is used for these four LEDs 41-44, respectively. The LED unit 4 has a function of facilitating the user to recognize that the gas corresponding to the LED is in some state by turning on or blinking the LED corresponding to the gas.

  The alarm lamp portions 5 are provided at both end portions in the Y direction. The alarm lamp unit 5 includes a red LED (not shown), and has a function of notifying the user of an alarm by turning on or blinking the red LED at the time of alarm.

  The operation unit 6 is provided between the display unit 3 and the LED unit 4. The operation unit 6 includes a pair of button units 61. The user can give various instructions to the alarm device 100 by operating the button unit 61. In particular, the alarm device 100 is configured such that when the user operates the operation unit 6, a gas (display target gas) that displays a detection result on the display unit 3 among the four types of gases can be selected. At this time, the user is configured to select a display target gas from a menu screen (not shown) displayed on the display unit 3.

  As shown in FIG. 2, the buzzer unit 7 has a function of notifying the user of an alarm by generating a buzzer sound at the time of alarm. The control unit 8 includes a CPU (not shown) and the like, and is configured to control the entire alarm device 100 including control related to an enlarged display (second display state) described later. Further, the control unit 8 acquires the detection results of the four types of gas from the sensor unit 2 every predetermined time (for example, 1 minute), and displays the acquired detection results of the gas on the display unit 3. It is configured. A specific display of the detection result on the display unit 3 will be described later. The storage unit 9 includes a ROM and a RAM (not shown), and stores various data and programs used in the control of the control unit 8.

  Next, with reference to FIG. 3, the detail of the display content of the display part 3 is demonstrated.

  As shown in FIG. 3, the display unit 3 is composed of a plurality of segments 3b arranged at predetermined positions. The segment 3b has various shapes such as a line shape, a dot shape, a character shape, and an icon shape. Further, the segment 3b has a liquid crystal (not shown) and is configured such that a corresponding shape (corresponding to a black portion in FIGS. 3 to 8) is displayed on the display unit 3 by switching the liquid crystal. Has been. In addition, since the display part 3 is comprised from the some segment 3b, since a drive voltage can be made low compared with the general display part by which several fine pixels are arrange | positioned at matrix form, for example easily It can be explosion-proof.

The display unit 3 includes four display areas 31 to 34 in which detection results of four types of gas are respectively displayed, and an icon display area 35 in which icons corresponding to information such as a battery (power supply) state are displayed. And an information display area 36 on which other information is displayed. Specifically, as the four display areas 31 to 34, a flammable gas display area 31 in which a flammable gas detection result is displayed, an O ₂ display area 32 in which an oxygen detection result is displayed, and a hydrogen sulfide detection result There H _{2 S} display area 33 is displayed and,, CO display region 34 a detection result of carbon monoxide is displayed is provided in the display unit 3. The combustible gas display area 31, the O ₂ display area 32, the H ₂ S display area 33, and the CO display area 34 are examples of the “display area” in the present invention.

  The combustible gas display region 31 is provided on the Y1 side of the display unit 3 and on the Z1 side. The combustible gas display area 31 includes a result display area 31a on the Z2 side and a character display area 31b on the Z1 side. The result display area 31a is configured such that seven segments 3b are combined to display four seven segments having the shape of the Arabic numeral “8” and a pair of dots arranged between the seven segments. Yes. The four 7 segments are arranged side by side in the Y direction.

  Further, by controlling the liquid crystal of the seven segments 3b, the four seven segments of the result display area 31a are configured to display Arabic numerals and alphabets from 0 to 9, respectively. Thereby, in the result display area 31a, it is possible to display numbers from the third decimal point (for example, 0.000) to the fourth digit (for example, 9999) by using the four segments and the dots. Yes, as a result, the result display area 31a is configured to display a numerical value (0 to 100 (% LEL)) of the detection result (concentration) of the combustible gas.

  The character display area 31b displays “COMB” meaning flammable gas and the detected concentration (% LEL) of the flammable gas exceeds the first alarm threshold set for the flammable gas (in the first stage). "AL1" that is turned on in the case of an alarm), "AL2" that is turned on when the second alarm threshold value that is larger than the first alarm threshold value is exceeded (in the case of a second-stage alarm), and flammable gas The unit “% LEL” can be displayed. Note that the second-stage alarm is set to be more easily recognized by the user than the first-stage alarm, such as changing the buzzer period or volume, for example, shortening the buzzer period or increasing the volume. Yes.

The O ₂ display area 32 is provided on the Y1 side of the display unit 3 and on the Z2 side. The O ₂ display area 32 includes a result display area 32a on the Z1 side and a character display area 32b on the Z2 side. The result display area 32a has substantially the same configuration as the result display area 31a. As a result, the result display area 32a has a numerical value (00.0 to 50.0 (vol%) of the oxygen detection result (concentration). )) Can be displayed. The character display area 32b is turned on when “O2” meaning oxygen and the detected oxygen concentration (vol%) are below the first alarm threshold set for oxygen (in the case of the first-stage alarm). “AL1”, “AL2” which is turned on when the second alarm threshold value is smaller than the first alarm threshold value (in the case of the second stage alarm), and the unit “vol%” of oxygen are displayed. It is configured to be possible.

The H ₂ S display area 33 is provided on the Y2 side of the display unit 3 and on the Z1 side. The H ₂ S display area 33 includes a result display area 33a on the Z2 side and a character display area 33b on the Z1 side. The result display area 33a has substantially the same configuration as the result display area 31a. As a result, the result display area 33a is a numerical value (00.0 to 150.0 (ppm) of the detection result (concentration) of hydrogen sulfide. )) Can be displayed. The character display area 33b is “H2S” meaning hydrogen sulfide and when the detected hydrogen sulfide concentration (ppm) exceeds the first alarm threshold set for hydrogen sulfide (in the case of the first stage alarm). “AL1” that is turned on, “AL2” that is turned on when the second alarm threshold value that is larger than the first alarm threshold value is exceeded (in the case of the second-stage alarm), and the unit of hydrogen sulfide “ppm” Is configured to be displayable.

  The CO display area 34 is provided on the Y2 side of the display unit 3 and on the Z2 side. The CO display area 34 includes a result display area 34a on the Z1 side and a character display area 34b on the Z2 side. The result display area 34a has substantially the same configuration as the result display area 31a. As a result, the result display area 34a displays the numerical value (0000 to 2000 (ppm)) of the detection result (concentration) of carbon monoxide. It is configured to be displayable. The character display area 34b displays “CO” meaning carbon monoxide and a case where the detected carbon monoxide concentration (ppm) exceeds the first alarm threshold set for the carbon monoxide concentration (first-stage alarm). "AL1" that is turned on in the case of (2), and "AL2" that is turned on when the second warning threshold value that is larger than the first warning threshold value is exceeded (in the case of a second-stage warning), and carbon monoxide The unit “ppm” can be displayed. In addition, in the character display area 34b, in addition to the unit of carbon monoxide (unit of hydrogen sulfide, ppm), a unit of combustible gas (% LEL) and a unit of oxygen (vol%) can be displayed. .

Further, as shown in FIG. 3, the result display areas 31 a to 34 a are all provided on the center side of the display unit 3. Thereby, the result display area 31a of the combustible gas display area 31 is adjacent to the result display area 32a of the O ₂ display area 32 on the Z2 side, and adjacent to the result display area 33a of the H ₂ S display area 33 on the Y2 side. doing. The result display area 32a of the O ₂ display area 32 is adjacent to the result display area 34a of the CO display area 34 on the Y2 side. The result display area 33a of the H ₂ S display area 33 is adjacent to the result display area 34a of the CO display area 34 on the Z2 side.

  The icon display area 35 is provided in the vicinity of the Y1 side end of the display unit 3. Further, in the icon display area 35, a mode in which only the battery icon indicating the remaining battery level and the maximum detection result value among the gas detection results are displayed in order from the Z1 side to the Z2 side is selected by the user. A PEAK icon that is displayed when the user selects a mode that reduces power consumption, an mute icon that is displayed when a user selects a mode that does not generate a buzzer sound, and A communication icon indicating that a wireless communication state using a wireless unit (not shown) is displayed can be displayed.

  The information display area 36 is provided in the vicinity of the side end portion on the Z2 side of the display unit 3. Further, the information display area 36 is configured to be able to display eight 16 segments obtained by combining the 16 segments 3b and point portions arranged between the 16 segments. The eight 16 segments are arranged side by side in the Y direction. As a result, by controlling the presence or absence of lighting of the 16 segments 3b, the eight 16 segments of the information display area 36 can each display Arabic numerals and alphabets from 0 to 9 more precisely than the seven segments. It is configured as follows. As shown in FIG. 4, the information display area 36 can display the date and temperature, the type of display target gas or alarm target gas (see FIGS. 5 and 8) that is enlarged and described later, and the like. It is configured.

  In addition, a round display unit 37 is provided on the Y2 side of the information display area 36. The round shape display unit 37 is configured so that when a retrofitting function is added to the alarm device 100, the user can recognize whether or not the added function is operating depending on the presence or absence of the round shape display unit 37. Has been.

  As a result, as shown in FIG. 4, in the alarm device 100 (see FIG. 1), the display unit 3 displays the detection results of the four kinds of gases in the first display state simultaneously displayed on the display unit 3. It is configured to be able to. In the first display state, the corresponding gas detection results are displayed as numerical values in each of the four result display areas 31a to 34a. The information display area 36 displays the date and temperature, and the character display areas 31b to 34b display the corresponding gas type and unit, respectively.

  Here, the display unit 3 is configured to be able to display the gas detection result in an enlarged manner as compared with the display in the first display state by combining the plurality of segments 3b of the result display areas 31a to 34a. . Specifically, in the second display state in which only the detection result of one type of gas (for example, oxygen) is displayed in an enlarged manner, as shown in FIG. By combining, the numerical value (20.0 (vol%)) of the detection result (concentration) of gas (oxygen) is enlarged and displayed. At this time, the type (O2) of the enlarged display target gas (oxygen) is displayed in the information display area 36, and the unit of the enlarged display target gas is displayed in the character display area 34b.

  In the second display state in which the detection results of two kinds of gases (for example, combustible gas and hydrogen sulfide) are enlarged and displayed in the vertical direction (Z direction), as shown in FIG. The detection results are enlarged and displayed side by side in the Y direction. Specifically, the detection result (9 (% LEL)) of one display target gas (flammable gas) is Z by combining the seven segments and the dot portions of the result display areas 31a and 32a adjacent in the Z direction. The display result of the other display target gas (hydrogen sulfide) (4.0 ppm) is obtained by combining the seven segments and the dot portions of the result display areas 33a and 34a adjacent to each other in the Z direction. ) Is enlarged and displayed in the Z direction. At this time, date and temperature are displayed in the information display area 36, and two character display areas (character display areas 34a and 34c) respectively corresponding to two kinds of display target gases (combustible gas and hydrogen sulfide) are displayed. The corresponding display target gas units are respectively displayed.

  Further, in the second display state in which the detection results of two types of gases (for example, hydrogen sulfide and carbon monoxide) are enlarged and displayed in the left-right direction (Y direction), as shown in FIG. The detection results are enlarged and displayed side by side in the Z direction. Specifically, the detection result (9.5 (ppm)) of one display target gas (hydrogen sulfide) is Y by combining the seven segments and the dot portions of the result display areas 31a and 33a adjacent in the Y direction. The other display target gas (carbon monoxide) detection result (37 (ppm)) by combining the seven segments and the dot portions of the result display areas 32a and 34a adjacent to each other in the Y direction while being enlarged and displayed in the direction. Is enlarged and displayed in the Y direction. The contents displayed in the information display area 36 and the two character display areas are the same as in FIG.

  As a result, in the display unit 3, the number of gas detection results that can be enlarged and displayed by combining the plurality of segments 3 b in the result display areas 31 a to 34 a (the number that can be enlarged) is two or less. Note that when the display unit 3 performs an enlarged display, the LEDs 41 to 44 of the LED unit 4 corresponding to the enlarged gas may be turned on or blinked. This makes it possible for the user to reliably recognize the type of gas displayed in an enlarged manner.

  In addition, when the concentration of a predetermined gas excluding oxygen exceeds the corresponding first alarm threshold among the four types of gases, or when the concentration of oxygen falls below the corresponding first alarm threshold (at alarm) In other words, the alarm device 100 is configured to switch to an alarm display state as shown in FIG. In the alarm display state, the enlarged display state in which only the detection result (94.0 (ppm)) of the gas to be alarmed (for example, hydrogen sulfide) is enlarged and displayed on the display unit 3 and the first display state are predetermined. It is configured to switch every time (for example, 1 second).

  When the number of alarm target gases is two (less than the maximum displayable number), the enlarged display state and the first display state in which the detection results of the two types of alarm target gases are enlarged and displayed on the display unit 3 simultaneously. Are switched every predetermined time. Further, when the number of alarm target gases exceeds the number that can be enlarged (three or more), the enlarged display state is set for a predetermined period, and the first display state is switched after the predetermined period has elapsed. Yes. In the enlarged display state in a predetermined period, the state in which the detection result of one type of alarm target gas is enlarged is switched for each alarm target gas.

  Here, in the present embodiment, when the user selects a gas other than the predetermined gas as the display target gas, the alarm device 100 controls the predetermined gas (shown in FIGS. FIG. 4 shows a second display state in which the detection result of the non-display target gas is not displayed on the display unit 3 and the detection result of the display target gas other than the non-display target gas is displayed on the display unit 3 in an enlarged manner. It is comprised so that it may switch from the 1st display state which displays each detection result of seed | species gas simultaneously. Note that the second display state includes all cases where the gas detection result is displayed in an enlarged manner than the gas detection result in the first display state.

  Further, the alarm device 100 determines that the state in which the concentration of the predetermined gas out of the four types of gases exceeds the display range corresponding to the predetermined gas and the state in which the concentration of the predetermined gas exceeds the display range is not displayed. When the time (for example, 40 hours) continues, the control unit 8 controls to switch from the first display state to the second display state. Note that the display range is set to a range from 0 to the display threshold in a predetermined gas excluding oxygen among the four types of gases. Here, the display threshold value of each of the predetermined gases excluding oxygen is set to a value smaller than the first alarm threshold value of each of the predetermined gases excluding oxygen. In oxygen, the display range is set to a range from the display threshold value to a predetermined upper limit value (for example, 50.0 (vol%)). Note that the oxygen display threshold is set to a value larger than the first alarm threshold. The display range is an example of “first range” and “second range” in the present invention, and the non-display determination time is an example of “first time” in the present invention.

  In other words, in the predetermined gas excluding oxygen among the four gases, the concentration of the predetermined gas exceeds the display threshold corresponding to the predetermined gas, and the concentration of the predetermined gas exceeds the display threshold Is configured to switch to the second display state when the non-display determination time continues. Further, in the case of oxygen, when the oxygen concentration is lower than the display threshold corresponding to oxygen, and when the state where the oxygen concentration is lower than the display threshold continues for the non-display determination time, the second display state is switched. It is configured.

  Here, when there is one kind of display target gas, as shown in FIG. 5, a second display state in which only the detection result of one type of display target gas is displayed in an enlarged manner. In addition, when there are two types of display target gases, as shown in FIG. 6 or FIG. 7, a second display state in which the detection results of the two types of display target gases are simultaneously enlarged and displayed. In addition, when the display target gas is three or four types, the second display state in which the detection result of one type of display target gas as shown in FIG. 5 is enlarged for each display target gas. become.

  Next, with reference to FIG. 9, the display control process of the display part 3 in the alarm device 100 of this embodiment is demonstrated concretely. This control process is performed by the control unit 8.

  First, in step S1, it is determined whether or not a predetermined time has elapsed since the acquisition of the previous gas detection result, and this determination is continued until a predetermined time has elapsed. When it is determined that a predetermined time has elapsed, in step S2, as a gas detection process, detection results of four types of gas are acquired from the sensor unit 2, and threshold values (first values) corresponding to the respective gases are obtained. 1 (second) alarm threshold and display threshold) are read from the storage unit 9.

  Then, in step S3, it is determined whether or not the concentration of each of the four gases excluding oxygen exceeds the corresponding first alarm threshold value, and the concentration of oxygen in the first gas corresponding to the first concentration is determined. By determining whether or not the alarm threshold value is below, it is determined whether or not there is an alarm target gas. If it is determined that there is an alarm target gas, an alarm process is performed in step S4. In the alarm device 100, as the alarm processing, among the LEDs 41 to 44 of the LED unit 4, the LED corresponding to the alarm target gas is lit or blinked, the red LED of the alarm lamp unit 5 is lit or blinked, and The buzzer unit 7 generates a buzzer sound.

  Thereafter, in step S5, the detection result of the alarm target gas is enlarged and displayed on the display unit 3 in the alarm display state shown in FIG. 8, and the process returns to step S1. Note that the alarm display state is continued until the alarm state is canceled. That is, in the alarm display state, even when the display target gas is selected by the user or when there is a display target gas that exceeds the display range, the display result of the detection target gas is expanded on the display unit 3. The alarm display state is maintained.

  When it is determined in step S3 that there is no alarm target gas, display control processing is performed in steps S6 to S15 to determine whether or not to display the detection target gas detection result in an enlarged manner.

  Specifically, first, in step S6, it is determined whether or not a new display target gas has been selected by the user. If it is determined that a new display target gas has not been selected by the user, the process proceeds to step S8. When it is determined that a new display target gas has been selected by the user, the display target gas and the non-display target gas are changed by the user's selection. In step S7, the changed number of display target gases is recorded in the storage unit 9. Then, the process proceeds to step S8. Thereby, in step S6 and S7, display object gas and non-display object gas are defined based on a user's selection.

  Next, in step S8, it is determined whether or not the concentration of the gas that is the non-display target gas is within the corresponding display range. When there are a plurality of non-display target gases, it is determined whether each is within the corresponding display range. If it is determined that the concentration of the non-display target gas exceeds the display range, it is determined in step S9 whether the concentration of the gas that is the display target gas exceeds the corresponding display range. If it is determined that the concentration of the display target gas exceeds the display range, it is determined in step S10 whether or not the state where the concentration of the display target gas exceeds the display range continues for the non-display determination time. When it is determined that the state in which the concentration of the display target gas exceeds the display range continues for the non-display determination time, it is determined that the display target gas has become the non-display target gas. When there are a plurality of display target gases, it is determined whether or not each display target gas has become a non-display target gas. In step S11, the storage unit 9 records that the number of display target gases has decreased. Thereafter, the process proceeds to step S12. Thereby, in step S8-S10, display object gas and non-display object gas are defined based on the density | concentration of gas.

  When it is determined in step S9 that the concentration of the display target gas is within the display range, or in step S10, the state where the concentration of the display target gas exceeds the display range does not continue for the non-display determination time. If it is determined, the process proceeds to step S12 as it is.

  In step S12, it is determined whether or not the display target gas number recorded in the storage unit 9 exceeds the maximum enlarged display number (two). When it is determined that the number of display target gases is less than or equal to the maximum enlarged display number (when it is the number of display target gases that can be enlarged and displayed on the display unit 3), in step S13, the display unit 3 detects the display target gas. The result is displayed in the second display state (see FIG. 5 or 6) in which the result is displayed in an enlarged manner, and the second display state is maintained until the display target gas number exceeds the maximum enlarged display number. And it returns to step S1 and this control processing is repeated.

  Further, when it is determined in step S12 that the number of display target gases exceeds the maximum enlarged display number (when the number of display target gases that can be enlarged and displayed on the display unit 3 is exceeded), in step S14, the display target gas is displayed. When the number exceeds the maximum enlarged display number, it is determined whether or not an enlarged display time (for example, 1 minute) has elapsed since the new determination. If it is determined that the enlarged display time has not elapsed, the display unit 3 displays the second display state (see FIG. 5) in step S13. If it is determined in step S14 that the enlarged display time has elapsed, the image is displayed in the first display state (see FIG. 4). As a result, when the number of display target gases that can be enlarged and displayed on the display unit 3 is exceeded, the detection result of the display target gas is switched to the second display state that is enlarged and displayed on the display unit 3 for the enlarged display time. After the enlargement display time elapses, the detection results of the four gases are returned to the first display state in which the display unit 3 is displayed at the same time. And it returns to step S1 and this control processing is repeated. The enlarged display time is an example of the “second time” in the present invention.

  If it is determined in step S8 that the concentration of the non-display target gas is within the display range, it is determined that the non-display target gas has become the display target gas. In step S16, the increase in the number of display target gases is recorded in the storage unit 9. Thereafter, in step S17, as in step S12, it is determined whether or not the number of display target gases recorded in the storage unit 9 exceeds the maximum enlarged display number. When it is determined that the display target gas number exceeds the maximum enlarged display number, the detection results of the four types of gases are displayed in the first display state displayed on the display unit 3 at the same time. As a result, in the second display state, when the concentration of the non-display target gas falls within the display range, the display returns to the first display state. The detection result of the non-display target gas that is within the display range is also displayed on the display unit 3. And it returns to step S1 and this control processing is repeated.

  If it is determined in step S17 that the number of display target gases is equal to or less than the maximum enlarged display number, the process proceeds to step S13 and is displayed in the second display state. And it returns to step S1 and this control processing is repeated.

  In the present embodiment, the following effects can be obtained.

  In the present embodiment, as described above, when the concentration of the predetermined gas exceeds the display range, the detection result of the predetermined gas (non-display target gas) is not displayed on the display unit 3 but other than the non-display target gas. The detection result of the display target gas is configured to be switched to the second display state in which the display unit 3 is enlarged and displayed. As a result, when the concentration of the non-display target gas exceeds the display range and it is less necessary for the user to recognize the concentration by indicating the detection result of the non-display target gas, the non-display target gas is not displayed. Since the detection result of the display target gas can be enlarged and displayed on the display unit 3, it is possible to easily recognize the detection result of the display target gas that is highly necessary for the user to recognize the concentration.

  Moreover, in this embodiment, when the display target gas is selected by the user, the display target gas is determined to have a high necessity for the user to recognize the concentration by switching to the second display state. It is possible to make the user easily recognize the detection result.

  In the present embodiment, in the second display state, when the concentration of a predetermined gas (non-display target gas) falls within the display range, in addition to the detection result of the display target gas, the non-display target gas The detection result of the predetermined gas, which is the above, is configured to return to the first display state displayed on the display unit 3. As a result, when the concentration of the non-display target gas that is not displayed on the display unit 3 is increased to the extent that the user needs to be recognized within the display range, the detection result of the predetermined gas is displayed on the display unit 3. Since it can return to the 1st display state displayed, it can be made to recognize the detection result of the predetermined gas to which the necessity of making a user recognize density | concentration became high to some extent.

  Further, the present embodiment is configured to switch to the second display state when the concentration of the detected predetermined gas exceeds the display range when the non-display determination time continues. As a result, since it is possible to switch to the second display state after sufficiently confirming that the user need not recognize the concentration of the predetermined gas, the concentration can be reduced due to temporary concentration fluctuations. It can suppress that the detection result of the gas which needs to be recognized is no longer displayed on the display unit 3.

  In the present embodiment, the display unit 3 displays the plurality of segments 3b in the result display areas 31a to 34a when the number of display target gases is equal to or less than the number that can be enlarged and displayed by combining a plurality of segments in the display area. When the number of gas detection results that can be enlarged and displayed (the number that can be enlarged and displayed) is exceeded, the display state is switched to the second display state only during the enlarged display time period. With this configuration, when the detection result of the display target gas can be enlarged and displayed at the same time, the detection result of the display target gas is enlarged and maintained, and the user is made to recognize the concentration. It is possible to easily recognize the detection result of the display target gas that is highly necessary. In addition, when the detection result of the display target gas cannot be enlarged and displayed at the same time, the detection result of the display target gas is enlarged for the enlarged display time so that the user can easily recognize the detection result of the display target gas. After the enlargement display time has elapsed, the detection results of all the gases including the display target gas are displayed on the display unit 3 at the same time, so that the detection results of all the display target gases can be recognized simultaneously by the user.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the display unit 3 can be displayed in a first display state in which the detection results of four types of gas are simultaneously displayed and a second display state in which the detection results of the display target gas are enlarged. However, the present invention is not limited to this. In the present invention, for example, the display unit can be displayed in a first display state and a second display state in which detection results of a plurality of types of gases other than four types (for example, six types of gases) are simultaneously displayed. You may comprise.

  In the above embodiment, in the alarm device 100, when the user selects a gas other than the predetermined gas as the display target gas, the alarm device 100 switches to the second display state, and the predetermined gas of the four types of gases is changed. Although the example which switches to a 2nd display state when the density | concentration exceeds the display range corresponding to predetermined | prescribed gas was shown, this invention is not limited to this. In this invention, you may comprise so that it may switch to a 2nd display state, only when gas other than predetermined gas is selected as display object gas by the user. Moreover, you may comprise so that it may switch to a 2nd display state, only when the density | concentration of the predetermined gas of 4 types of gas exceeds the display range corresponding to a predetermined gas.

  In the above-described embodiment, the example in which the state is switched to the second display state when the state in which the concentration of the predetermined gas of the four types of gases exceeds the display range continues for the non-display determination time has been described. Is not limited to this. In the present invention, when the state in which the concentration of the predetermined gas exceeds the display range continues for a predetermined number of detection times (for example, 2400 times when performing the gas detection processing every minute), the second display state You may comprise so that it may switch to. In addition, when it is determined that the predetermined gas concentration exceeds the display range, the second display state may be immediately switched to. Thereby, it is possible to make the user recognize the detection result of the display target gas having a high necessity of recognizing the concentration more quickly.

  Moreover, in the said embodiment, although the display part 3 showed the example comprised from the some segment 3b each arrange | positioned at the predetermined position, this invention is not limited to this. In the present invention, the display unit may be configured from other than a segment. For example, a general display unit in which a plurality of fine pixels are arranged in a matrix may be used. Thereby, it is possible to easily display the detection result of the alarm target gas or the calibration target gas and the information of the abnormality in an enlarged manner.

  Further, in the above embodiment, the “first range”, which is a criterion for determining the concentration of the predetermined gas when the first display state is switched to the second display state, and the first display from the second display state. Although an example in which the “second range”, which is a criterion for determining the concentration of a predetermined gas when switching to a state, is set to the same range (display range) is shown, the present invention is not limited to this. In the present invention, the first range and the second range may be different. For example, in the case of a gas whose danger increases as the concentration increases, the upper limit value of the second range may be set to a value smaller than the upper limit value of the first range. At this time, the upper limit value of the first range needs to be equal to or lower than the first alarm threshold value. In the case of a gas whose danger increases as the concentration decreases, the lower limit value of the second range may be set to a value larger than the lower limit value of the first range. At this time, the lower limit value of the first range needs to be equal to or greater than the first alarm threshold value.

  In the above embodiment, when it is determined that the concentration of the non-display target gas exceeds the display range, the display target gas is displayed in the first display state when the display target gas number exceeds the maximum enlarged display number. Although an example in which the number is displayed in the second display state when the number is equal to or less than the maximum enlarged display number is shown, the present invention is not limited to this. In the present invention, when it is determined that the concentration of the non-display target gas exceeds the display range, the display may be performed in the first display state without considering the maximum number of enlarged displays.

  Further, in the above-described embodiment, in the second display state, when there are two types of display target gases, the example in which the detection results of the two types of display target gases are enlarged and displayed simultaneously is shown. Not limited to. In the present invention, even if there are two types of display target gases, the detection result of one type of display target gas is displayed in an enlarged manner in the second display state, as in the case of three or four display target gases. You may comprise so that the state performed may be switched for every display object gas.

  In the above embodiment, the alarm unit 100 includes the sensor unit 2 including the four sensors 21 to 24 corresponding to the four types of gas, and the display unit 3 capable of simultaneously displaying the detection results of the four types of gas. Although the example provided is shown, this invention is not limited to this. In the present invention, the display unit can simultaneously display the detection results of four types of gas, while when the sensor unit can detect only two or less types of gas, the sensor unit detects by the user's selection. The detection result of the gas that cannot be detected may not be displayed, and only the detection result of the gas that can be detected may be displayed in an enlarged manner.

  Further, in the above embodiment, when the predetermined gas becomes the non-display target gas because the predetermined gas concentration exceeds the display range, the user is notified that the predetermined gas becomes the non-display target gas. You may comprise. At this time, notification can be made by displaying on the display unit that a predetermined gas becomes a non-display target gas, or by blinking an LED corresponding to the non-display target gas in the LED unit.

  Moreover, in the said embodiment, although the LED 41-44 of the LED part 4 corresponding to the enlarged display gas was turned on or blinked in the 2nd display state in which the detection result of the display object gas is enlarged displayed, it showed the example. The present invention is not limited to this. In the present invention, in the second display state, the LED corresponding to the non-display target gas of the LED unit is flashed or the backlight is flashed to notify that the non-display target gas exists. You may comprise.

  Moreover, in the said embodiment, when the number of alarm object gas exceeds the number which can be enlarged and displayed, it will be in an enlarged display state only for a predetermined period, and the example comprised so that it may switch to a 1st display state after progress for a predetermined period. However, the present invention is not limited to this. The present invention may be configured to immediately switch to the first display state when the number of alarm target gases exceeds the displayable number.

  Moreover, in the said embodiment, the gas (display object gas) which displays a detection result on the display part 3 is selected from four types of gas by operating the operation part 6 in which a user can perform various instructions. Although an example configured as possible is shown, the present invention is not limited to this. In this invention, you may provide the operation part (button part) for exclusive use for selecting display object gas. When two types of display target gases are selected, the detection results of the two types of display target gases are enlarged and displayed simultaneously (see FIGS. 6 and 7), or the detection result of one type of display target gas is displayed. It may be possible to select whether to alternately enlarge and display (see FIG. 5).

  Moreover, in the said embodiment, when it is judged that the number of display object gas exceeds the maximum expansion display number, the 2nd display state by which the detection result of display object gas is expanded-displayed by the display part 3 only for expansion display time In addition, the example in which the detection results of the four gases are returned to the first display state displayed on the display unit 3 at the same time after the enlarged display time has elapsed has been shown, but the present invention is not limited to this. . In the present invention, once switched to the second display state, it may be configured such that after returning to the first display state, the switch to the second display state cannot be made unless a predetermined time elapses. Furthermore, in the present invention, when it is determined that the display target gas number exceeds the maximum enlarged display number, the first display state may be maintained without switching to the second display state.

  In the above embodiment, in the alarm display state, even when the display target gas is selected by the user or when the display target gas exceeds the display range, the display on the display unit 3 is the alarm target. Although the example in which the gas detection result is maintained in the alarm display state in which the gas detection result is enlarged is shown, the present invention is not limited to this. In the present invention, even in the alarm display state, when the display target gas is selected by the user or when the display target gas exceeds the display range, the display on the display unit is changed from the alarm display state to the first display. The state may be switched to a second display state in which two types of gas are displayed simultaneously. In this case, when there are three or more display target gases including the alarm target gas, it is preferable to switch to the first display state in which the detection results of the four gases are simultaneously displayed on the display unit. When the display target gas to be included is two types, it is preferable to switch to the second display state in which the detection results of the two types of gas are displayed simultaneously. In the above case, it may be configured to switch to the first display state for a predetermined time and to return to the alarm display state after the predetermined time has elapsed. Furthermore, once switched to the first display state, it may be configured so that it cannot be switched to the first display state unless a predetermined time has elapsed after returning to the alarm display state.

  Moreover, in the said embodiment, combustible gas, oxygen, hydrogen sulfide, and carbon monoxide were shown as four types of gas which the alarm device 100 can detect, However, This invention is not limited to this. In the present invention, the alarm device may be configured to detect other gases such as ozone and ammonia. At this time, in the case of a gas whose danger increases as the concentration increases, the first (second) alarm threshold value and the display threshold value are the upper limit of the concentration as in the case of the flammable gas, hydrogen sulfide and carbon monoxide. Set as a value. Further, in the case of a gas whose danger increases as the concentration decreases, the first (second) alarm threshold value and the display threshold value are set as the lower limit value of the concentration, similarly to oxygen.

2 Sensor unit (gas detection unit)
3 Display section 3b Segment 31 Combustible gas display area (display area)
32 O ₂ display area (display area)
33 H ₂ S display area (display area)
34 CO display area (display area)
100 alarm

Claims (4)

A gas detector capable of detecting a plurality of gases;
A display unit capable of displaying in a first display state for simultaneously displaying detection results of each of the plurality of gases,
Is a part of the gas of the plurality of gas, the concentration of the predetermined gas, Oite the case exceeds the first range is a range not to exceed the alarm threshold, the detection result of the predetermined gas It said predetermined detection result of Viewing target gas other than the gas is configured to switch the second display state is enlarged and displayed on the display unit, the alarm device without being displayed on the display unit. A gas detector capable of detecting a plurality of gases;
A display unit capable of displaying in a first display state for simultaneously displaying detection results of each of the plurality of gases,
At least one of the case where the concentration of the predetermined gas, which is a part of the plurality of gases, exceeds the first range, and the case where the user selects a gas other than the predetermined gas as the display target gas In this case, the detection result of the predetermined gas is not displayed on the display unit, but the detection result of the display target gas other than the predetermined gas is switched to the second display state in which the display result is enlarged and displayed on the display unit. Composed of
In the second display state, when the concentration of the predetermined gas falls within the second range, the detection result of the predetermined gas is displayed on the display unit in addition to the detection result of the display target gas. is configured to return to the first display state is, alarm device. A gas detector capable of detecting a plurality of gases;
A display unit capable of displaying in a first display state for simultaneously displaying detection results of each of the plurality of gases,
At least one of the case where the concentration of the predetermined gas, which is a part of the plurality of gases, exceeds the first range, and the case where the user selects a gas other than the predetermined gas as the display target gas In this case, the detection result of the predetermined gas is not displayed on the display unit, but the detection result of the display target gas other than the predetermined gas is switched to the second display state in which the display result is enlarged and displayed on the display unit. Composed of
The display unit is composed of a plurality of segments, and includes a plurality of display areas for displaying the detection results of each of the plurality of gases,
When the number of the display target gases is equal to or smaller than the number that can be enlarged and displayed by combining the plurality of segments in the display area, the second display state is maintained while switching to the second display state. When the number of the display target gases exceeds the number that can be enlarged and displayed by combining the plurality of segments in the display area, the display state gas is switched to the second display state only for a second time period. , Alarm. The case where the concentration of the predetermined gas to be detected exceeds the first range is configured to switch to the second display state when the first time or the predetermined number of detections continues. The alarm device of any one of -3.

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