JP3484045B2 - Inspection device for gas leak alarm - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak alarm device for inspecting a gas leak alarm device for detecting a gas leak and issuing an alarm, and more particularly to a gas leak alarm device before installation. Alternatively, the present invention relates to an inspection device for a gas leak alarm that inspects its function after installation.

[0002]

2. Description of the Related Art Generally, a gas leak alarm device has a gas detection part which is detachably mounted on condition that it is replaced at regular intervals, and the magnitude of a detection signal output from the gas detection part is an alarm level. An alarm determination unit that determines that the
Consists of an alarm sound generation unit that emits a gas leak alarm sound based on the judgment of the alarm judgment unit, a signal output unit that outputs an alarm signal to the outside, and an alarm unit such as a display unit that displays various instructions and alarms. Has been done. In the case of this type of safety equipment, not only when installing the gas leak alarm, so that the alarm can be surely issued when an alarm is needed,
Even after installation, it is required to check its function regularly or as needed.

Therefore, conventionally, the gas detection unit and the alarm determination unit are checked by injecting the inspection gas from the injection port provided in the case of the gas leak alarm and confirming the operation with respect to the simulated gas leak state. The inspection method for inspecting the operations of the alarm sound generating section, the signal output section, and the display section of the alarm section has been generally adopted.

[0004]

By the way, as described above, the gas detecting section is replaced at regular intervals, and it is guaranteed that the gas detecting section functions reliably during the period. The function of the alarm judgment unit, which mainly processes signals, is not substantially impaired, and it is not necessary to re-inspect at the time of installation or periodic inspection. The target also included the gas detector.

Therefore, in the case of city gas, since the gas is lighter than air, the installation location of the gas leak alarm A is the ceiling B as shown in FIG. When inspecting the gas leak alarm device, the worker D uses the stepping stool, chair C, etc., to inspect the gas to be inspected at the time of installation or at the time of periodic inspection at the user's request, for example, once a year. The inspection work had to be carried out because the inspection work of injecting into the detection section had to be performed.

In particular, recently, there has been a demand for a ceiling-type gas leak alarm for city gas having an incomplete combustion detection function. In such a case, the city (C
Since it was necessary to simultaneously inspect two kinds of gas, H ₄ ) gas and CO gas, the inspection work became more and more difficult.

Therefore, in view of the above-mentioned situation, the present invention provides an inspection device for a gas leak alarm device, which can simplify the inspection of the gas leak alarm device by omitting the inspection of the gas detection part and the alarm determination part. The task is to do.

[0008]

In order to solve the above-mentioned problems, the inspection device for a gas leak alarm according to the present invention, which is made according to the present invention, has a fixed period as shown in the basic configuration diagram of FIG.
It is detachably mounted on the condition that it is replaced with
A detection signal with a magnitude that corresponds to the concentration of the elephant gas
The gas detecting means 11 for outputting and the gas detecting means for outputting
It is determined that the magnitude of the detected signal exceeds the alarm level.
By the alarm determination means 121-1 for determining
Alarm sound generating means 13 for sounding an alarm based on the judgment of
And an alarm means 20 having at least
Select the type of alarm sound to be used from among multiple prepared in advance
Manual operation means 14 and the alarm sound generation means 13
Is based on the judgment by the warning judgment means 121-1
When the alarm sound is emitted, it is selected by the manual operation means 14.
The gas leak alarm that produces the selected alarm sound.
Based on the judgment by the warning judgment means 121-1
If the alarm sound generating means 13 is not in a state of generating an alarm sound
Operation detecting hand for detecting the operation of the manual operation means 14.
Step 121-3 and detection by the operation detecting means 121-3
According to the selection by the manual operation means 14
An alarm sound of the obtained type is output by the alarm determination means 121-1.
The same operation as the alarm sound generating means 13 emits depending on the judgment.
Point to generate a signal to cause the alarm means 20 to perform the same operation
The detection signal generating means 121-2 is provided .

With the above structure, the gas detection means 11 is detachably mounted on condition that it is replaced at regular intervals.
Outputs a detection signal having a magnitude corresponding to the concentration of the gas to be detected, and the alarm determination means 121-1 determines that the magnitude of this detection signal exceeds the alarm level. The alarm sound generation means 13 generates an alarm sound selected by the manual operation means 14 when emitting an alarm sound based on the determination by the alarm determination means 121-1. Therefore, the gas leak alarm device can emit an alarm sound in a distinguishable manner according to the detection of a plurality of types of detection target gas having a predetermined concentration or higher.

Moreover, when the alarm sound generating means 13 is not in a state of emitting an alarm sound based on the judgment by the alarm judging means 121-1, the operation detecting means 121-3 is one of the manual operation means 14 provided for another purpose. When the operation is detected, the inspection signal is a signal that causes the alarm sound of the type selected and switched by the manual operation means to perform the same operation as the operation of the alarm sound generation means 13 of the alarm means 20 according to the determination of the alarm determination means 121-1. Since the generating means 121-2 is generated and the alarm sound generating means 13 is operated, the operation of the alarm means 20 having the alarm sound generating means 13 can be checked by observing this operation. .

[0011] Inspection device for a gas leak alarm device according to claim 2 Symbol mounting, as shown in the basic diagram of Fig. 1, the inspection device for a gas leak alarm device according to claim 1 Symbol placement, the alarm means, wherein An alarm display means 15 for emitting an alarm by light based on the judgment by the alarm judgment means, and a signal output means 16 for outputting an alarm signal to the outside based on the judgment by the warning judgment means.
The inspection signal generation means further generates a signal for causing the alarm display means and the signal output means to perform the same operation as the operation performed by the alarm display means and the signal output means. Is characterized by.

With the above structure, when the alarm determination means 121-1 determines that the magnitude of the detection signal output by the gas detection means 11 exceeds the alarm level, the alarm sound generation means 13 sounds an alarm, The alarm display means 15 emits an alarm by light, and the signal output means 16 outputs an alarm signal to the outside. The alarm sound generating means 13 is the alarm determining means 121-1.
When the alarm sound is emitted based on the judgment by the above, the alarm sound selected by the manual operation means 14 is generated. Therefore,
The gas leak alarm device can issue various alarms in a distinguishable manner according to the detection of a gas to be detected having a predetermined concentration or higher.

Moreover, when the alarm sound generating means 13 is not in a state of emitting an alarm sound based on the judgment by the alarm judging means 121-1, the operation detecting means 121-3 is one of the manual operation means 14 provided for another purpose. When the operation is detected, the inspection signal is a signal that causes the alarm sound of the type selected and switched by the manual operation means to perform the same operation as the operation of the alarm sound generation means 13 of the alarm means 20 according to the determination of the alarm determination means 121-1. Since the generating means 121-2 generates the alarm sound generating means 13, the alarm display means 15, and the signal output means 16, the alarm sound generating means in the alarm means 20 is observed by observing these operations. It is possible to check the operations of 13, the alarm display means 15, and the signal output means 16.

[0014] Inspection device for a gas leak alarm device according to claim 3 Symbol mounting, as shown in the basic diagram of Fig. 1, detachably mounted on the condition to be exchanged at regular intervals, a detection target The gas detection means 11 for outputting detection signals of respective magnitudes corresponding to the concentrations of a plurality of kinds of gases, and it is judged that the magnitude of each detection signal output by the gas detection means exceeds the alarm level. Alarm determination means 121-1
And other alarms based on each judgment made by the alarm judgment means .
Alarm sound generating means 13 for emitting a sound distinguishable from a gas alarm
And alarm means 20 for at least having, Hassu is said alarm means
That I the type of alarm sound of a plurality of previously prepared for each gas
And a manual operating means 14 for take selection, the alarm sound generating means, when generating an alarm sound based on each determination by the alarm determination means, for generating an alarm sound that is selected by said manual operation means gas In the leak alarm device, when the alarm sound generating means is not in a state of emitting an alarm sound based on each judgment by the alarm judging means, an operation detecting means 121-3 for detecting an operation of the manual operating means, and the operation detecting means 121-3. In response to the detection by the means, an alarm sound of the type selected and switched by the manual operation means is continuously operated by the alarm sound generation means by the same judgment operation as the alarm sound generation means. And a check signal generating means 121-2 for generating a signal to be executed.

With the above structure, the gas detecting means 11 is detachably mounted on condition that it is replaced at regular intervals.
Outputs a detection signal having a magnitude corresponding to the concentrations of a plurality of types of gas to be detected. The alarm determination unit 121-1 determines that the magnitude of the detection signal output by the gas detection unit 11 exceeds the alarm level, and based on each determination, the alarm sound generation unit 13 issues an alarm. The alarm display means 15 emits an alarm by light, and the signal output means 16 outputs an alarm signal to the outside. Therefore, the gas leak alarm device can issue various alarms corresponding to the detection of the plurality of types of detection target gases having a predetermined concentration or higher.

Moreover, when the alarm sound generating means 13 is not in a state of emitting an alarm sound based on the judgment by the alarm judging means 121-1, the operation detecting means 121-3 is one of the manual operation means 14 provided for another purpose. When an operation is detected, an alarm sound of the type selected and switched by the manual operation means is output by each of the alarm determination means 121-1.
Since the inspection signal generating means 121-2 generates a signal for continuously performing the same operation as the operation generated by each of 3 and the alarm sound generating means 13 is continuously operated, this operation is observed. As a result, the operation of the alarm sound generating means 13 for a plurality of types of detection target gas can be inspected.

The inspection device for a gas leak alarm device according to claim 4 Symbol mounting, as shown in the basic diagram of Fig. 1, the inspection device for a gas leak alarm device according to claim 7, wherein the alarm means, said alarm Based on each judgment made by the judgment means, an alarm display means 15 for emitting an alarm with light that can be distinguished from the other, and an alarm signal distinguishable from the other based on each judgment made by the alarm judgment means are output to the outside. Signal output means 16
The inspection signal generating means generates a signal for causing the alarm display means and the signal output means to continuously perform the same operation as that performed by the alarm display means and the signal output means. It is characterized by doing.

With the above configuration, when the alarm determination means 121-1 determines that the magnitude of the detection signal output by the gas detection means 11 exceeds the alarm level, the alarm sound generation means 13 distinguishes the alarm from others. The alarm display means 15 emits an alarm with a light that can be distinguished from the other,
The signal output means 16 outputs an alarm signal that can be distinguished from the others to the outside. Therefore, the gas leak alarm device can issue various alarms corresponding to the detection of the plurality of types of detection target gases having a predetermined concentration or higher.

Moreover, when the alarm sound generating means 13 is not in a state of emitting an alarm sound based on the judgment by the alarm judging means 121-1, the operation detecting means 121-3 is provided for another purpose and the inspection start operation means 14 is provided. When the operation of is detected, the alarm sound of the type selected and switched by the manual operation means is caused to continuously perform the same operation as the operation of the alarm sound generation means 13 of the alarm means 20 by the determination of the alarm determination means 121-1. The inspection signal generating means 121-2 generates a signal,
Since the alarm sound generating means 13, the alarm display means 15, and the signal output means 16 are continuously operated, the alarm sound generating means 13 for a plurality of types of gas to be detected can be observed by observing this operation. The operation of the alarm display means 15 and the signal output means 16 can be checked.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a circuit configuration diagram showing a gas leak alarm device incorporating the inspection device according to the present invention. In the figure, the gas leak alarm is a detection target city (CH
₄ ) CH ₄ gas detector 11a that detects a gas and outputs a detection signal having a magnitude corresponding to the gas concentration, CO that detects a CO gas to be detected and outputs a detection signal having a magnitude corresponding to the gas concentration It has a gas detection unit 11 as a gas detection unit composed of the gas detection unit 11b, and a microcomputer (μCOM) 12 for inputting each detection signal from these gas detection units 11 to input ports I ₁ and I ₂ .

The μCOM 12 is a central processing unit (CPU) 1 that performs a predetermined process according to a predetermined program.
21, a read-only memory (ROM) 122 that stores fixed data necessary for a program and processing that defines the processing performed by the CPU 121, and a data area that stores data generated during the processing performed by the CPU 121 and a processing step It has a built-in memory (RAM) 123 which has a work area used in the above and is freely read and written. μCOM1
The CPU 121 of No. 2 performs analog / digital (A / D) conversion of each detection signal input from the gas detection unit 11 according to the program stored in the ROM 122, inputs the signals, and outputs CH ₄ gas and CO gas based on the conversion result. Is determined to be equal to or higher than a predetermined alarm level.

When the CPU 121 determines on the basis of each detection signal input from the gas detector 11 that the gas is a CH ₄ gas or a CO gas having an alarm level or higher, the μCOM 12 outputs two kinds of audible alarms. A speaker 13 as an alarm sound generating means to be emitted is connected to the output port O _1, and an alarm sound selection switch for selecting whether the alarm sound to be generated by the speaker 13 is generated by voice or buzzer sound. 14 is connected to the input port I ₃ . When the alarm sound selection switch 14 is turned on, for example, when the μCOM 12 determines that the CH ₄ gas is at the alarm level or higher, “Pippi-pi-pi-pi-pi gas is leaking?” When it is determined that the gas is CO gas, the speaker 13 outputs a voice saying, "Pippopipopoppi the air is dirty and dangerous. Open the window for ventilation." On the other hand, when the alarm sound selection switch 14 is turned off, for example, the μCOM 12 determines that the CH ₄ gas is the CH ₄ gas having the alarm level or higher, and that the CO gas is the CO gas having the alarm level or higher. When it is determined that "beep beep", the speaker 13 is caused to generate a buzzer sound to give an alarm. The alarm sound selection switch 14 is also used as an inspection start operation means or a manual operation means.

The μCOM 12 also has a green light emitting diode (GLED) 15a that is constantly turned on during operation, a red light emitting diode (RLED) 15b that is turned on when it is determined that the CH ₄ gas is above the alarm level, and an alarm. An indicator 15 as an alarm display means including a yellow light emitting diode (YLED) 15c that is turned on when it is determined that the CO gas is at a level or higher is output port O _2.
It is connected to ~ O _4, the output circuit 16 as a signal output means for outputting a voltage signal to the outside is connected to the output ports O ₅ and O _6. CPU 121 of μCOM12
When the output circuit 16 which constantly outputs the voltage signal of 6V to the output OUT is judged to be CH ₄ gas or CO gas of the alarm level or higher, the voltage signal of 12V, 18V
The respective voltage signals of are output.

The μCOM 12 is further connected to the input port I ₄ at the interconnection point of the resistor R3 and the thermistor TH, and to the input port I ₅ at the interconnection point of the resistors R1 and R2. Based on the voltage input to the input port I ₄ and the temperature correction data stored in the ROM 122, the ROM 122 of the μCOM 12 performs the temperature correction operation of the voltage input to the input port I ₅ as the reference voltage of the alarm determination unit. To do. Reference numeral 17 is a power supply circuit that receives an AC commercial power supply via an outlet 18 and supplies operating power to the gas detection unit 11, the μCOM 12, the indicator 15, the output circuit 16, and the like.

In the above configuration, C above the alarm level
When the μCOM 12 inputs the detection signal output from the CH ₄ gas detection unit 11a in response to the detection of H ₄ gas to the input port I ₁ , the CPU 121 raises the output port O ₃ to which the RLED 15b is connected from H level to L level. Lowering, whereby the RLED 15b is turned on. CPU121
Also reads the state of the alarm sound selection switch 14 connected to the input port I ₃ , and outputs the alarm sound selection switch 14
When is turned on, a signal is output to the output port O ₁ and the speaker 13 is made to generate a sound such as “Pippipipping gas is leaking?”, And when the alarm sound selection switch 14 is turned off. A signal is output to the output port O ₁ to cause the speaker 13 to generate a “beep beep” buzzer sound. Further, the CPU 121 raises the output port O ₅ from the L level to the H level and causes the output OUT of the output circuit 16 which constantly outputs the voltage signal of 6 V to output the voltage signal of 12 V.

On the other hand, the detection signal output from the CO gas detector 11b in response to the detection of the CO gas above the alarm level is expressed in μC.
When the OM 12 inputs to the input port I ₂ , the CPU 121
Outputs the output port O ₄ to which the YLED 15c is connected to H
From the level to the L level, the YLED
15c is turned on. The CPU 121 also reads the state of the alarm sound selection switch 14 connected to the input port I ₃ , and when the alarm sound selection switch 14 is turned on, outputs a signal to the output port O ₁ to output the speaker 13.
"When the air is dirty, it is dangerous to open the air. Please open the window to ventilate." When the alarm sound selection switch 14 is off, output port O ₁
Output a signal to the speaker 13 and "pippoppipopp"
Generates a buzzer sound with. The CPU 121 further raises the output port O ₆ from the L level to the H level and outputs 18 V to the output OUT of the output circuit 16 which constantly outputs the voltage signal of 6 V.
The voltage signal of is output.

As described above, the alarm sound selection switch 14 is
It is for selecting whether the alarm sound to be generated by the speaker 13 is to be generated by voice or buzzer sound, and the on / off state thereof may be read by the CPU 121 when gas above the alarm level is detected. The on / off state of the alarm sound selection switch 14 is read and constantly monitored even when gas above the alarm level is not detected.

Then, when there is a change in the on / off state of the alarm sound selection switch 14 read when no gas above the alarm level is detected, that is, when there is a switching operation of the alarm sound selection switch 14, CPU1
Numeral 21 judges that there is a signal input for starting the simple inspection of the alarm sound generating function, the alarm lighting function and the alarm output function, and automatically signals the output ports O ₁ , O _{3 to} O ₆ at a predetermined timing. Is output. This output port O ₁ , O ₃ ~
An alarm sound is generated in the speaker 13 by the signal automatically output from O _6, and the RLED 15b of the indicator 15 is generated.
The YLED 15c is turned on and the output circuit 16 is caused to output a voltage signal so that the alarm sound generation function, the alarm lighting function and the alarm output function can be automatically inspected.

Specifically, when the alarm sound selection switch 14 is switched while the gas above the alarm level is not detected, the CPU 121 of the μCOM 12 causes the RLED 15b and the YLE of the indicator 15 to operate as shown in FIG.
CH to D15c, speaker 13, and output circuit 16
₄ Simulate the automatic operation when detecting gas and CO gas, and check easily whether it operates normally.

That is, the CPU 121 performs an output operation at the time of detecting CH ₄ gas during the first fixed time, and μCOM1
2 output port O ₃ is changed to H-L-H level and RL
The ED 15b is turned on, and at the same time, a signal having a pattern as shown in FIG. 4 is output to the output port O ₁ to generate a sound “Pippipippipgas is leaking?” In the speaker 13, and after that, The buzzer sound is generated in the speaker 13 and the output port O ₅ is LHL.
It changes to the level and causes the output circuit 16 to output a voltage signal of 12V.

After the above-mentioned fixed time ends, the CPU 121 performs an output operation at the time of detecting CO gas, changes the output port O _{4 of the} μCOM 12 to the H-L-H level, and changes the YLED15.
Turn on c, and at the same time, output a signal with a pattern as shown in Fig. 5 to the output port O ₁ and output a sound "Pippoppippoppi the air is dirty and dangerous to open the window to ventilate" to the speaker 13. After that, a buzzer sound is generated in the speaker 13 and the output port O ₆
Is changed to the LHL level and the output circuit 16 is caused to output a voltage signal of 18V.

The details of the operation of the gas leak alarm device incorporating the above-described inspection device will be described below with reference to the flowcharts of FIGS. 6 to 9 showing the processing performed by the CPU 121 in accordance with a predetermined program.

The CPU 121 starts the operation of the flow chart shown in FIG. 6 when the power is turned on, initializes it in the first step S1, and in the subsequent step S2, detects the detection signal input to the input port I ₁ by A / D. It is converted and read, and stored in a predetermined area M1 of the RAM 123. Next, in step S3, the detection signal input to the input port I ₂ is A / D converted and read, and the RAM
It is stored in another predetermined area M2 of 123. After that, the process proceeds to step S4, the state of the input port I ₃ is read and stored in the predetermined area M3 of the RAM 123 as the current state, and the previous state stored in this predetermined area is RA.
The data is stored in another predetermined area M4 of M123.

Next, in step S5, it is determined whether the value I1 stored in the predetermined area M1 is larger than the predetermined value I1k. The determination in step S5 is YES
If so, the process proceeds to step S6 to set the flag F1 and then to step S7, where the CH ₄ gas alarm process is performed, and then the process returns to step S2. Step S above
When the determination in step 5 is NO, the process proceeds to step S8 to determine whether or not the flag F1 is set.
If it is O, the process proceeds to step S9, and if the determination is YES, the process proceeds to step S10 to reset the flag F1 and then proceeds to step S9.

In step S9, it is determined whether the value I2 stored in the predetermined area M2 is larger than the predetermined value I2k. If the determination in step S9 is Y
In the case of ES, the process proceeds to step S11 to set the flag F2 and then to step S12, where the CO gas alarm process is performed and then the process returns to step S2. If the determination in step S9 is NO, the process proceeds to step S13 to determine whether or not the flag F2 is set. If the determination is NO, the process proceeds to step S14 and the determination is Y.
If ES, the process proceeds to step S15 to reset the flag F2, and then proceeds to step S14.

In the step S14, the predetermined areas M3 and M of the RAM 123 in the step S4.
It is determined whether or not the alarm sound selection switch 14 is switched by comparing the current and previous states of the input port I ₃ stored in 4 respectively. If this determination is NO, the process returns to step S2 and the above-described operation is performed. repeat. On the other hand, when the determination in step S14 is YES, it is determined that the start of the simple inspection operation is instructed, the process proceeds to step S16, the simple inspection process is performed, and the process returns to step S2 in response to the end.

In the CH ₄ gas alarm processing in step S7, as shown in the flowchart of FIG. 7, the output port O ₃ is changed from H to L in the first step S7a.
The level is set, and this causes the RLED 15b to light up. Next, in step S7b, the output port O _{5 is set} to L.
From the H level to 1 level in the output circuit 16
Output a voltage signal of 2V. Then the current state of the input port I ₃ stored in a predetermined area M3 of RAM123 proceeds to step S7c, the alarm sound selection switch 14 determines whether the on state, this determination is YE
In the case of S, the process proceeds to step S7d, and the voice alarm signal for generating the voice "Pippipipping gas is leaking?" Is output to the output port O ₁ and then the process returns to step S2 of the original flowchart. . When the determination in step S7c is NO, the process proceeds to step S7e to output a buzzer alarm signal for causing the speaker 13 to generate a "beep beep" buzzer sound to the output port O ₁ , and then returns to step S2 of the original flowchart.

In the CO gas alarm processing in step S12, as shown in the flowchart of FIG. 8, the output port O ₄ is changed from H level to L level in the first step S12a, and thereby the YLED 15c is turned on. Next, in step S12b, the output port O ₆
From the L level to the H level, whereby the output circuit 16
To output a voltage signal of 18V. Then step S1
2c, depending on the current state of the input port I ₃ stored in the predetermined area M3 of the RAM 123, it is determined whether or not the alarm sound selection switch 14 is on. If this determination is YES, the process proceeds to step S12d. Then, the speaker 13 outputs a voice alarm signal to the output port O ₁ to generate a voice saying “Pippopipoppo the air is dirty and dangerous, please open the window for ventilation.” Then, the process returns to step S2 of the original flowchart. The determination in step S12c is N
When it is O, the process proceeds to step S12e to output a buzzer alarm signal for causing the speaker 13 to generate a beeping buzzer sound to the output port O ₁ , and then returns to step S2 of the original flowchart.

In the simple inspection process of step S16, as shown in the flowchart of FIG. 9, in the first step S16a, the output port O _{3 is set} to the L level, the output port O _{4 is set} to the H level, and the RLED 15b is turned on. The YLED 15c is turned off. Then step S
Proceeding to 16b, the output port O _{5 is set} to H level, which causes the output circuit 16 to output a voltage signal of 12V. Next, in step S16c, the T1 timer having a fixed time of, for example, 5 seconds is started, and then step S16d.
Then, a signal is output to the output port O ₁ and the buzzer sound for the CH ₄ gas is output to the speaker 13 “pippipipipipipip”.
Is started, and in the next step S16e, the generation of the buzzer sound is awaited.

When the generation of the buzzer sound started in step S16d ends, the determination in step S16e is YES.
When S, the process proceeds to step S16f and the output port O ₁
And it outputs the signal to start the occurrence of the "Do not leak gas" voice for the CH ₄ gas to the speaker 13, wait for the CH ₄ generation the end of the voice of gas for in the next step S16g to. When the generation of sound for CH ₄ gas ends and the determination in step S16g becomes YES, step S16h
The process proceeds to step S16i, and waits for the T1 timer started in step S16c to time out before proceeding to step S16i. In step S16i, it is determined whether or not the occurrence of "pippippippiga gas leaking" for two phrases has ended, and if the determination is NO, the process returns to step S16c and the above step S1.
6c to S16i are repeated, and if the determination is YES, the process proceeds to step S16j.

In step S16j, for example, the T2 timer for a fixed time of 20 seconds is started, and then the process proceeds to step S16k, where a signal is output to the output port O ₁ and the speaker 13 outputs a buzzer sound for CH ₄ gas. The generation of "beep beep" is started, and the next step S16
Wait for the end of the buzzer sound at m. Step S above
When the generation of the buzzer sound started in 16k ends and the determination in step S16m becomes YES, step S16
n, it is determined whether or not the T2 timer started in step S16j has timed out. If the determination in step S16n is NO, the process returns to step S16k to return to steps S16k to S16.
Repeat n.

When the determination in step S16n is YES, the process proceeds to step S16A to set the output port O ₃ to the H level and the output port O ₄ to the L level to make the RLED 15b.
Is turned off and the YLED 15c is turned on. Then the output port O ₆ proceeds to step S16B to H level, thereby outputting a voltage signal of 18V to the output circuit 16 by this. Next, in step S16C, the T3 timer having a fixed time of 8 seconds is started, and then step S16.
Proceed to D, where a signal is output to the output port O ₁ and the buzzer sound for CO gas is output to the speaker 13
Generation is started, and in the next step S16E, the generation of the buzzer sound is awaited.

When the generation of the buzzer sound started in step S16D ends, the determination in step S16E is YE.
When S is reached, the process proceeds to step S16F to output port O ₁
A signal is output to the speaker 13 to cause the speaker 13 to generate a sound for CO gas "The air is dirty and dangerous, please open the window to ventilate.", And the sound for CO gas is generated in the next step S16G. Wait for the end. When the generation of the sound for CO gas ends and the determination in step S16G becomes YES,
The process proceeds to step S16H, waits for the T3 timer started in step S16C to time out, and then proceeds to step S16J. In step S16J, it is determined whether or not the occurrence of the two phrases "Pippoppippoppo is dirty and dangerous, please open the window to ventilate." If the judgment is NO, return to step S16C. The above steps S16C to 16J are repeated, and when the determination is YES, the process proceeds to step S16K.

In step S16K, for example, the T4 timer for a fixed time of 14 seconds is started, and then the process proceeds to step S16L, where a signal is output to the output port O ₁ and the speaker 13 emits a buzzer sound for CO gas. "Pippippipp" is started and the next step S16M
Wait until the buzzer sound is generated. Step S1
When the generation of the buzzer sound started in 6L ends and the determination in step S16M becomes YES, step S16N
And started at step S16K above.
4 Determine whether the timer is over,
When the determination in step S16N is NO, the process returns to step S16L and steps S16L to S16N are repeated.

If the determination in step S16N is YES, the process proceeds to step S16P to output ports O ₃ and O _3.
Set both ₄ to H level and RLED15b and YLED
Turn off 15c. Then, in step S16Q, the output ports O ₅ and O ₆ are both set to the L level, which causes the output circuit 16 to output the voltage signal of 6 V to end the series of simple inspection processing. Return to.

As is clear from the description given with reference to the flow charts of FIGS. 6 to 9, the CPU 121 issues an alarm for determining that the magnitude of the detection signal output by the gas detector 11 exceeds the alarm level. According to the manual operation of the judgment means 121-1 and the alarm sound changeover switch 14 as the inspection start operation means, the speaker 13 as the alarm sound generation means, the indicator 15 as the alarm display means, and the output circuit as the signal output means are judged by the judgment. When the inspection signal generating means 121-2 for generating a signal for continuously performing the same operation as 16 respectively, and the speaker 13 as an alarm sound generating means based on the determination are not in a state of emitting an alarm sound. , Respectively as the operation detecting means 121-3 for detecting the operation of the alarm sound changeover switch 14 as the manual operating means. .

In the above-described embodiment, the alarm sound changeover switch 14 for selecting whether to generate the alarm sound by voice or the buzzer sound is also used as the inspection start operation means or the manual operation means. so, may not be separately provided the operation means for the, that has become a cost, space-effective configuration.

Further, in the above-mentioned embodiment, the gas detection section 11 is adapted to detect CH ₄ gas and CO gas, but the present invention is also applied to those which detect other plural kinds of gases. be able to.

Further, in the above-mentioned embodiment, the gas leak alarm device outputs the alarm based on the alarm determination.
As an example, a speaker 13 as an alarm sound generating means, an indicator 15 as an alarm display means, and an output circuit 16 as a signal output means are provided, but the present invention is also effective for an apparatus having at least one of these. Can be applied to.

[0050]

As described above, according to the first aspect of the invention, the alarm is provided on condition that the alarm sound is not emitted.
To select from among a plurality of pre-prepared types of alert sounds
When the operation of the operating means provided on the
The same operation as when the alarm sound is generated, assuming that
The alarm sound is generated automatically.
Because you can observe the work, no special operation means
Without provision, it is possible to control the operation of the means related to the alarm sound generation.
Check briefly before .

[0051] According to claim 2 Symbol placing of the invention, the operation of the means associated to the alarm can be checked easily in advance,
In addition to the operation of generating an alarm sound, at least one operation of alarm display and alarm signal output is provided, and by observing these operations, it is possible that these become inactive when an alarm is required. Can be prevented.

[0052] According to the invention of claim 3 Symbol mounting, on condition that there is no state for issuing an alarm sound, a type of alarm sound in the gas
On the other hand, when the operation of the operation means provided to select from a plurality of prepared in advance is detected, it is considered that there is an instruction to start inspection, and the operation at the time of alarm for multiple types of gas to be detected The same as the alarm sound generation operation, which can be automatically and continuously performed and the operation can be observed, so it is not necessary to provide any special operation means and is related to alarms for multiple types of gas to be detected. Check the operation of the measures taken in advance simply.

[0053] According to claim 4 Symbol placing of the invention, the operation of the means associated to the alarm can be checked easily in advance,
In addition to the operation of generating an alarm sound, at least one operation of displaying an alarm and outputting an alarm signal is performed. By observing these operations, when an alarm is required for a plurality of types of gas to be detected, these operations are performed. Can be prevented from becoming inactive.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a gas leak alarm inspection device according to the present invention.

FIG. 2 is a block diagram showing a simplified configuration of an overall configuration of a gas leakage alarm device incorporating the inspection device according to the present invention.

FIG. 3 is an explanatory diagram showing a procedure of a simple inspection.

FIG. 4 is a diagram showing a voice pattern when a CH ₄ gas alarm is issued.

FIG. 5 is a diagram showing a voice pattern when a CO gas alarm is issued.

FIG. 6 is a flowchart showing main processing performed by a CPU of μCOM in FIG.

FIG. 7 is a flowchart showing details of CH ₄ gas alarm processing in FIG.

FIG. 8 is a flowchart showing details of CO gas alarm processing in FIG.

9 is a flowchart showing details of the simple inspection process in FIG.

FIG. 10 is a diagram for explaining how to inspect a conventional gas leak alarm.

[Explanation of symbols]

11 Gas Detection Means (Gas Detection Section) 121-1 Alarm Judgment Means (CPU) 121-2 Inspection Signal Generation Means (CPU) 121-3 Operation Detection Means (CPU) 13 Warning Sound Generation Means (Speaker) 14 Inspection Start Operation Means Manual operation means (alarm sound selection switch) 15 Alarm display means (indicator) 16 Signal output means (output circuit) 20 Alarm means

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Claims (4)

(57) [Claims] 1. A gas detection means, which is detachably mounted on condition that it is replaced at regular intervals, and which outputs a detection signal of a magnitude corresponding to the concentration of the gas to be detected, and the gas detection means. Alarm determination means for determining that the magnitude of the detection signal output by the means exceeds the alarm level, alarm means having at least alarm sound generation means for issuing an alarm based on the determination by the alarm determination means, and the alarm A manual operation means for selecting the kind of the alarm sound emitted from the means from a plurality of prepared in advance , when the alarm sound generating means emits an alarm sound based on the judgment by the alarm judging means, in inspection device for a gas leak alarm to inspect the gas leakage alarm for generating an alarm sound that is selected by said manual operation means, said alarm sound generating means based on a determination by the alarm determination means Is not in a state of emitting an alarm sound, an operation detection means for detecting an operation of the manual operation means, and an alarm sound of a type selected and switched by the manual operation means according to the detection by the operation detection means. An inspection device for a gas leak alarm, comprising inspection signal generating means for generating a signal for causing the alarm means to perform the same operation as the operation generated by the alarm sound generating means according to the judgment of the alarm judging means. 2. The alarm means includes an alarm display means for emitting an alarm by light based on the judgment by the alarm judging means, and a signal output means for outputting an alarm signal to the outside based on the judgment by the alarm judging means. The inspection signal generating means further includes at least one, and the inspection signal generating means further generates a signal for causing the alarm display means and the signal output means to perform the same operation as the operation performed by the alarm display means and the signal output means. claim 1 Symbol placement of gas leakage alarm inspection apparatus characterized. 3. Gas detection means, which is detachably mounted on condition that it is replaced at regular intervals, and which outputs detection signals of respective magnitudes according to the concentrations of a plurality of types of gases to be detected. An alarm determination unit that determines that the magnitude of each detection signal output by the gas detection unit exceeds an alarm level, and an alarm is distinguished from an alarm of another gas based on each determination by the alarm determination unit. Alarming means having at least an alarming sound generating means for emitting a possible sound, and the alarming hand
The types of alarm sounds emitted by the dan were prepared in advance for each gas.
And a manual operating means for selecting from among a plurality, the alarm sound generating means, when generating an alarm sound based on each determination by the alarm determination means, for generating an alarm sound that is selected by said manual actuating means In a gas leak alarm inspection device for inspecting a gas leak alarm, the operation of the manual operation means is detected when the alarm sound generating means is not in a state of emitting an alarm sound based on each judgment made by the alarm judging means. an operation detection unit, in response to detection by the manipulation detecting means, the same operations as emitted by the warning sound generating means by each determine the constant of the alarm determining means alarming sound kind switched selected by the manual operation means And a check signal generating means for generating a signal for causing the alarm means to continuously perform. 4. The alarm means is an alarm display means for emitting an alarm with light that can be distinguished from the other based on each judgment made by the alarm judging means, and the other can be distinguished from each other based on each judgment made by the alarm judging means. The system further includes at least one of signal output means for outputting an alarm signal to the outside, and the inspection signal generating means performs the same operation as the alarm display means, the signal output means, the alarm display means, inspection device for a gas leak alarm device according to claim 3 Symbol mounting characterized by generating a signal for continuously performed to the signal output means.