JP2626847B2 - Alarm device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device provided with an operation switch for an alarm test.

[0002]

2. Description of the Related Art In a fire or gas leak alarm device, it is required to provide a display test device according to the provisions of the Fire Service Law. The switch for performing this test is operated by a qualified person, has a structure that is intentionally difficult to operate so that ordinary people can not easily touch it, and can be operated only with a special jig, for example. Is common. In the test of the fire alarm function, it is only necessary to operate the test switch and confirm whether or not the alarm can be obtained immediately. However, when the alarm of the detector continues for a certain period of time, the alarm is issued. For example, in the case of a gas leak alarm function or the like, it is necessary to check the delay operation time over the time period. Therefore, it is necessary to keep operating the test switch for a predetermined time, for example, 30 to 40 seconds during the test operation. Must.

[0003]

This operation is troublesome due to the intentional difficulty of operating the test switch, and hinders the efficiency of the test operation. To eliminate such inconvenience in the test operation, an alarm device in which the test switch is of a lock type is also known. In this case, a means for indicating that the test switch is in a locked state is provided. Is required,
This is one of the reasons for increasing the cost of the alarm device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a test switch which can be constituted by a non-lock type operation switch which does not need to provide a lock state display means. It is an object of the present invention to provide an alarm device capable of automatically performing a test operation sequence including a timed operation after operation once without having to continue operation.

[0005]

In order to achieve the above-mentioned object, an alarm device according to the present invention includes a fire detector and a gas leak detector, and detects and issues a physical change in a monitoring area to issue an alarm. Detecting means, a receiving circuit including a fire receiving circuit and a gas leak receiving circuit for receiving an alarm signal from the detecting means, and an output when the output of the receiving circuit continues for a predetermined time period Delay means, an alarm circuit for receiving an output from the delay means to generate an alarm, an operating means comprising a non-locking type automatic return switch for generating a test operation signal, and when the test operation signal is generated. A test circuit for giving a false alarm signal to the receiving circuit to test an alarm operation, and when the test operation signal is generated, the test operation signal is sent to the test circuit for a longer time than the predetermined time limit. At the test time And a control means for continuously give me.

[0006]

In the alarm device according to the present invention, when the detecting means detects a physical change in the monitoring area and issues an alarm, the alarm signal is received by the receiving circuit, and the receiving circuit generates an output.
The output of the receiving circuit is provided to the delay means, which produces an output when it continues for a predetermined time period.

[0007] The detecting means includes a fire detector and a gas leak detector. In the case of a gas leak detector, the delay means produces an output when the output of the receiving circuit continues, for example, for 40 seconds. When the delay means produces an output, the display provides a display as needed and the alarm circuit issues an alert, for example, by a voice message.

The operating means is a non-locking type automatic return switch, so that once operated, a test operation signal is generated and the operation can be immediately resumed. When the test circuit receives the test operation signal, it supplies a false alarm signal to the receiving circuit, whereby the delay means and the alarm circuit perform an alarm operation as in the actual alarm. At this time, the control means sets the test operation signal to the test circuit for a predetermined test time, that is, the delay means, regardless of whether the operation means is restored when the test operation signal is generated. Time (for example, 50 seconds)
(Seconds).

Therefore, it is sufficient to operate the operating means only once for the test operation, and the timed operation required for the test is internally processed by the delay means, and it is not necessary to keep operating the operating means during that time. Further, since the operating means can be returned immediately after the operation, there is no need to use a lock-type test switch, and therefore, there is no need for a means for displaying the locked state. The control means extinguishes the test activation signal after a lapse of a time (for example, 50 seconds) longer than the time limit of the delay means, during which time the time operation of the delay means is confirmed.
When the test operation signal disappears, the alarm device automatically returns from the test state to the monitoring state.

Therefore, in the alarm device of the present invention, it is possible to reliably and easily perform a test on the timed operation of all the receiving circuits of the fire detector and the gas leak detector, and also the timed operation of the delay means.

[0011]

FIG. 1 shows the configuration of an alarm device according to an embodiment of the present invention. This device is an alarm device in which a fire detector 1 and a gas leak detector 2 installed in a monitoring area are connected. The receiver 3 is configured. The alarm receiver 3 includes a fire receiving circuit 4 that receives an alarm signal from the fire detector 1, a fire indicator light 5 that lights when the fire receiving circuit 4 generates a reception output, and a gas leak detector 2. A gas leak receiving circuit 6, a microcomputer 7, a test circuit 8, a test switch 9 including a non-locking type automatic return switch, a voice synthesis circuit 10, an amplifier 11,
It includes a speaker 12 and a gas leak indicator light 13.

The microcomputer 6 has a delay circuit 71 for generating an output when the output of the gas leak receiving circuit 5 is continuously received for a time period of 40 seconds, and a microcomputer for generating an output when the delay circuit 71 generates an output. A display output unit 72 for turning on the gas leak indicator light 13, an alarm generation unit 73 that receives a reception output of the fire reception circuit 4 and an output of the delay circuit unit 71 and outputs a corresponding voice synthesis control signal. A level change detecting section 7 for detecting a voltage level change occurring when the test switch 9 is closed by an operation as a test operation signal.
4, a timer unit 75 for starting a timed operation when the detection unit 74 generates a detection output, and an input level of the test circuit 8 which is controlled by the output of the timer unit 75 during the timed operation. And a switching unit 76 for holding the level.

The voice synthesizing circuit 10 responds to the content of the voice synthesizing control signal given from the alarm generating section 73 of the microcomputer 7 by, for example, "fire has occurred" or "gas leak has occurred". A voice message signal is output, and the voice message signal is output as a voice from the speaker 12 via the amplifier 11.

In this embodiment, the test circuit 8 is configured to generate a false alarm signal by a transistor switching circuit. That is, the input transistor 8
1 indicates that the base potential is "L" due to the closing of the test switch 9.
When the level falls to the level, the transistor conducts, and the other transistors 82 and 83 also conduct. The transistor 82 connects the input terminal of the fire receiving circuit 4 to the pseudo resistor 8 by its conduction.
4, which provides a low impedance to the input of the fire receiving circuit 4 as low as when the fire detector 1 gives an alarm. Further, the transistor 83 transmits the potential of the 12 V power supply terminal to the input terminal of the gas leak receiving circuit 6 due to the conduction, and thereby a high potential equivalent to that when the gas leak detector 2 generates an alarm is applied to the input of the gas leak receiving circuit 6. give.

Now, the test operation by the closing operation of the test switch 9 will be described with reference to the operation sequence of FIG. 2. The sequence starts when the test switch 9 is closed by the operation of the operator. The base potential of the input transistor 81 of the test circuit 8 drops to the ground level "L". As a result, all of the transistors 81, 82 and 83 are turned on, and a false alarm signal is given to the fire receiving circuit 4 and the gas leak receiving circuit 6, respectively. At this time, the microcomputer 7
It is determined whether a reception output is generated from the fire receiving circuit 4 (step 101), whether a reception output is generated from the gas leak receiving circuit 6 (step 102), and whether the test switch 9 is closed. The determination as to whether the base potential of the input transistor 81 of the test circuit 8 has dropped to the ground level "L" (step 103) is performed simultaneously and in parallel.

When it is determined in step 101 that the fire receiving circuit 4 has generated a reception output based on the false alarm signal from the test circuit 8, the microcomputer 7 executes step 104 in FIG. The corresponding speech synthesis control signal is immediately supplied from the section 73 to the speech synthesis circuit 10. As a result, for example, a voice message "fire has occurred" is output from the speaker 12, so that the worker can confirm at that time that the fire alarm function is normal.

If it is determined in step 102 that the gas leak receiving circuit 6 has generated a reception output based on the pseudo alarm signal from the test circuit 8, the microcomputer 7 executes step 105 in FIG. Delay circuit section 71
Then, it is confirmed whether or not the reception output continues for 40 seconds. When the continuation of the reception output is confirmed, step 1
Proceeding to step 06, the display output unit 72 is caused to light the gas leak indicator lamp 13, and further, step 107 is executed, and the corresponding speech synthesis control signal is immediately supplied from the alarm generation unit 73 to the speech synthesis circuit 10. As a result, for example, a voice message “Gas leak is occurring”
The operator can then confirm that the gas leak alarm function is normal.

Further, at step 103, it is determined whether or not the input potential of the test circuit 8 has dropped to the ground level "L". This is performed by the level change detecting unit 74 in the embodiment of FIG. That is, once the test switch 9 is closed by the operation of the operator, the base potential of the transistor 81 drops to the ground level “L”. The level change detecting section 74 detects this decrease in the voltage level change as a test operation signal, and immediately turns on the switching section 76 via the timer section 75 to change the input potential of the test circuit 8 to the ground level “L”. And the timed operation of the timer unit 75 is started (step 10).
8). Thereby, the microcomputer 7 performs step 1
In step 09, the system is kept in the test operation mode for a time period of, for example, 50 seconds longer than the set time period of the delay circuit unit 71, and the test circuit is held for a predetermined test operation time period (50 seconds). The test operation signal is continuously provided by maintaining the input potential of the signal 8 at the ground level “L”.

Step 101 and Step 102
Is automatically executed by the microcomputer 7 during this test time period. When the elapse of the test time period is confirmed in step 109, the timer unit 75 returns the switching unit 76 to the cut-off state in step 110. Then, the input potential of the test circuit 8 is returned to the high level “H”. At this time, the test switch 9 has already been opened, so that the test operation signal to the test circuit is unlatched, the test operation automatically ends, and the system returns to the monitoring state.

[0020]

As described above, according to the present invention,
It is sufficient to operate the operating means only once during the test work,
The timed operation required for the test is internally processed by the delay means, and there is no need to keep operating the operating means during that time. Further, since the operating means can be returned immediately after the operation, there is no need to use a lock-type test switch, and therefore, there is no need for a means for displaying the locked state. The control means cancels the test operation signal when the time longer than the time limit of the delay means elapses, so that it is possible to confirm the timed operation of the delay means during that time. Automatically returns to the monitoring state from the state.

As described above, according to the present invention, the test switch can be constituted by a non-lock type operation switch which does not require the provision of a lock state display means, and the test switch, which is intentionally difficult to operate, is operated in a timed manner. There is provided an alarm device capable of automatically performing a test operation sequence including a timed operation after being operated once without having to continuously operate for a test.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an alarm device according to one embodiment of the present invention.

FIG. 2 is a flowchart showing a flow of a test operation sequence.

[Explanation of symbols]

 1: Fire detector 2: Gas leak detector 3: Alarm receiver 4: Fire receiver circuit 5: Fire indicator light 6: Gas leak receiver circuit 7: Microcomputer 8: Test circuit 9: Test switch 10: Voice synthesis circuit 11 : Amplifier 12: Speaker 13: Gas leak indicator light 71: Delay circuit section 72: Display output section 73: Alarm generation section 74: Level change detection section 75: Timer section 76: Switching section 81: Transistor 82: Transistor 83: Transistor 84 ： Pseudo resistance

Claims (1)

(57) [Claims] 1. A detecting means including a fire detector and a gas leak detector, detecting a physical change in a monitoring area and issuing an alarm, a fire receiving circuit receiving an alarm signal from the detecting means, and a gas leak. A receiving circuit including a receiving circuit; a delay unit that generates an output when the output of the receiving circuit continues for a predetermined time period; and an alarm circuit that receives an output from the delay unit and generates an alarm. Operating means comprising a non-locking type automatic recovery switch for generating a test operation signal; and a test circuit for giving a false alarm signal to the receiving circuit when the test operation signal is generated to test an alarm operation. And control means for continuously applying the test operation signal to the test circuit when the test operation signal is generated over a test time longer than the predetermined time limit. Alarm device.