JPH113483A - Fire alarm and test equipment with remote test function - Google Patents

Abstract

(57) [Summary] [Problem] Even if there is an abnormality in a fire detector on the way, the test can be performed to the end and the abnormality detector can be identified on the test device side. A tester (18) sends out a test signal to a repeater (10) during a test and sends a test signal to a test signal line to test the fire detectors (12a to 12n). The test alert signal from the fire detector is taken into the tester 18 via the repeater 10, and the number of test alerts is counted and stored. If the test alarm signal from the next fire sensor is not received within a specified time after receiving the test alarm signal from the fire sensor, it is determined that the fire sensor under test is abnormal. The test signal is controlled to supply the test signal to the next sensor. Further, if there is an abnormality in the fire detector at the end of the test, the number of the fire detector is displayed based on the stored value of the counter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a test signal line to a plurality of sensors connected in parallel between a pair of lines drawn from a repeater and connecting the tester to the repeater. The present invention relates to a fire alarm system with a remote test function for remotely performing a test of a sensor and a tester.

[0002]

2. Description of the Related Art Conventionally, in a fire alarm system installed in an apartment house or the like, a fire detector is installed in each dwelling unit, and is installed in a fire receiver and a control room in the dwelling unit by detecting a fire of the fire detector. It sends out a fire detection signal to the receiver in the living building to warn of abnormalities. In order to test the fire detectors in each dwelling unit, a person usually enters each dwelling unit and operates one by one using a fire detector tester, for example, a smoke tester or a heating tester. I have confirmed.

[0003] However, in such a test method, it is necessary to enter each dwelling unit to perform the test, and the resident may be away or may not be allowed to enter the dwelling unit due to privacy or other problems. Therefore, in recent years, it has been considered that the fire detector is remotely tested from outside the house without entering the house. Such a system is disclosed in JP-A-8-30.
No. 5977.

In this system, in addition to a pair of lines for connecting a fire detector in parallel from a repeater or a receiver, a test signal line for supplying a test power supply to the fire detector is connected in series. I have. When conducting the test, connect an inspection device to the repeater or receiver, switch the pair of lines connected to the fire detector to the inspection device side, and enable the receiver to perform an alarm operation with the detection signal from the inspection device .

[0005] Then, a test power supply is supplied from the checker to the test signal line, and a test power supply is supplied to the fire detector connected first to perform an alarm operation. If the fire detector is normal, the fire detector issues an alarm and the test power is supplied to the next fire detector. In this way, fire detectors are sequentially fired, and if all of the fire detectors are normal, it is determined that all of the fire detectors have normally operated due to the current that can flow through the terminating resistor connected to the end of the test signal line. to decide.

[0006] When it is determined that everything is normal, the result of the test can be determined by operating the receiver as an alarm. Thus, all the fire detectors remotely connected to the detector line can be tested.

[0007]

However, in such a conventional system, when one of a plurality of fire detectors is abnormal, the test power supply is stopped at the abnormal fire detector. The fire detector is not supplied to the next fire detector and the fire detectors after the abnormal fire detector cannot be tested. In addition, it is not possible to specify which of the plurality of fire sensors is abnormal, and it takes time to deal with the problem after the test.

The present invention has been made in view of such conventional problems, and even if there is an abnormality in a fire detector on the way, the test can be performed to the end and the abnormality detector can be identified on the tester side. It is an object of the present invention to provide a fire alarm system and a test device with a remote test function.

[0009]

The present invention that achieves this object has the following configuration. First, the present invention connects a plurality of fire detectors in parallel between a pair of lines drawn through a repeater from a dwelling unit receiver installed in a dwelling unit, and further a test signal line drawn from the repeater. A remote test function that connects multiple fire detectors to the tester, connects the tester to the repeater during the test, sends test signals from the tester to the test signal line, and remotely tests multiple fire detectors Fire alarm equipment.

In such a fire alarm system with a remote test function according to the present invention, the fire detector operates according to the test signal input from the input test signal line, and outputs the test signal when the test is issued. A switching circuit for outputting to the test signal line is provided, and a terminator is connected to a terminal of the fire detector connected in series with the test signal line. The repeater further includes a repeater circuit unit that receives a signal during the test from the tester during the test and switches and connects the pair of lines to which the fire detector is connected from the dwelling unit receiver to the tester side.

Further, the tester transmits a test signal to the repeater during the test and also transmits a test signal to the test signal line to test the fire detector, and transmits a test report signal from the fire detector to the repeater. Counts and stores the number of test issuances via the device, and keeps the test alert signal from the next fire detector even if a predetermined time has passed after receiving the test alert signal from the fire detector. If the fire detector is not received, the fire detector under test is determined to be abnormal and the test signal is controlled so as to supply a test signal to the next detector. A tester circuit is provided to indicate which fire detector is abnormal based on the value.

For this reason, even if there is an abnormality in the fire detector on the way and the test is not issued, the test signal can be transmitted to the next fire detector to perform the test to the end. In addition, the number of the fire detector in which an abnormality has occurred is obtained as a test result, which makes it easy to deal with after the test. The test circuit unit of the tester includes a test voltage control circuit that reduces the voltage of the test signal to a predetermined value when it determines that the fire detector under test is abnormal. Corresponding to this, the switching circuit of the fire detector detects a drop in the test voltage, with the first switching unit for sending the test signal to the next stage fire detector based on the fire alarm test report by the test signal. And a second switching unit for forcibly transmitting a test signal to the next-stage fire detector even when the fire alarm is not in the test alert state.

[0013] The fire detector switches an alarm current flowing between a pair of lines by an alarm operation when a test signal is received, by flowing the alarm current through a fire indicator lamp of the fire detector and then by flowing the current through a switching circuit. An operation is performed so that even when an alarm indicator light is abnormal, the tester can determine that an abnormality has occurred without causing the fire detector to issue a test alarm. The test circuit section of the tester detects the signal level when the test signal flows to the terminator connected to the end of the test signal line, judges that the test signal has been supplied to all fire detectors, and performs the test. A termination signal detection circuit for terminating is provided.

Further, the test circuit section of the tester determines that the fire alarm has been issued by an actual fire and performs the actual fire processing when the test alarm signal from the fire detector continues for a predetermined time or more. A fire signal detection circuit is provided. In this actual fire process, the test is stopped, the repeater is returned to the normal monitoring state, a fire alarm is issued, and the test device itself displays the fire alarm. The test circuit section of the tester performs the normal test mode in which the fire alarm test is issued to the last fire sensor and ends, and the test is performed again without ending after the fire alarm test is issued to the end. It has a function of switching to a repetitive test mode for transmitting a signal to repeat a test operation. In the repetitive test mode, the alarm indicator light of the fire detector blinks upon repetition of the test operation, so that it can be used for checking the alarm indicator lamp and searching for a fire detector determined to be abnormal in a dwelling unit.

The test circuit section of the tester further has a test mode switching function capable of testing the alarm function of the dwelling unit receiver in the dwelling unit. Further, the present invention also connects a plurality of fire detectors in parallel between a pair of lines pulled out from a dwelling unit receiver installed in a dwelling unit via a repeater, and furthermore, a test signal line drawn from the repeater. Connect multiple fire detectors to
Provided is a tester that is connected to a repeater at the time of a test, transmits a test signal to a test signal line, and remotely tests a plurality of fire detectors.

The test circuit section of the tester transmits a signal under test to the repeater at the time of the test and also transmits a test signal to the test signal line to test the fire detector, and a test alert signal from the fire detector Is received via the repeater, the number of test alerts is counted and stored, and even if a predetermined time has passed since the test alert signal was received from the fire detector, the next fire detector received If the test alert signal is not received, the fire sensor under test is judged to be abnormal and the test signal is controlled so that the test signal is supplied to the next sensor. If there is an abnormality, the number of the fire detector is displayed based on the stored value of the counter. Other points are the same as those of the fire alarm tester.

Further, the tester of the present invention has a test terminal for directly connecting a sensor connection jig provided with a terminator to the tester main body, and a sensor is connected to the sensor connection jig connected to the test terminal. The test can be performed with the fire detector alone with the main body attached.

[0018]

FIG. 1 is a block diagram of a fire alarm system with a remote test function according to the present invention. First, the fire alarm system is, for example, in a single dwelling unit, the repeater 10, the fire detectors 12a to 12n, the dwelling unit receiver 14, and the outdoor display 16
It consists of. When testing the fire detectors 12a to 12n in the dwelling unit, an external tester 18 can be connected to the repeater 10 installed outside the dwelling unit as shown in the drawing to perform the test.

From the repeater 10, a pair of lines L and C and a test signal line QA are drawn out. Fire detectors 12a to 12n are connected in parallel between the pair of lines L and C. Fire detectors 12a to 12n are connected in series to test signal line QA. The fire detectors 12a to 12n have a pair of lines L and C on the side thereof, a disconnection monitoring terminating resistor 22 as a terminator.
Are connected, while the test signal line QA and the common side line C are connected.
Is connected to a test terminating resistor 20. The terminating resistors 20 and 22 have different resistance values. For example, the disconnection monitoring terminating resistor 22 has a resistance of about 1 to 1.2 kΩ, and the test terminating resistor 19 has a resistance of about 3 to 4.7 kΩ. The terminator may be not only a resistor but also a combination of a resistor and a capacitor.

The dwelling unit receiver 14 has the fire detectors 12a to 12n connected between the pair of lines L and C via the repeater 10. That is, a pair of tracks S from the dwelling unit receiver 14
L and SC are switched between a pair of lines L and C on the fire detector side in the repeater 10. For this switching connection, the relay 10 is provided with a switching relay 28, and the line SL of the receiver 14 for dwelling units and the line L on the fire detector side are connected by the switching relay contact ry1. Also, the common side line S
C and C are connected in series.

In the normal monitoring state, the switching relay 28 is inactive and the relay contact ry1 is switched to the side b, whereby the fire detectors 12a to 12c are connected between the pair of lines SL and SC from the dwelling unit receiver 14. 12n is connected. The switching relay 28 provided in the repeater 10 is connected to the external tester 1
Activated by the under test signal from 8 and the switching relay contact r
The y1 is switched to the a side to disconnect the fire detectors 12a to 12n from the dwelling unit receiver 14, and is connected to the external tester 18 via the repeater 10.

When the switching relay 28 is actuated, the under test lamp 26 connected in parallel lights up, indicating that the test is being performed by the external tester 18 in the repeater 10. Further, a relay contact ry2 of the switching relay 28 is provided. The relay contact ry2 is connected to the dwelling unit receiver 14 by the signal lines ST and STC during the test, and the relay contact ry2 is closed by the operation of the switching relay 28 at the time of the test. It informs the receiver 10 that the test is being performed by the external tester 18.

A pair of tracks S from the dwelling unit receiver 14
A confirmation alarm circuit 25 including a transistor 24 is provided between the signal lines connected to L and SC. The external tester 18 disconnects the fire detectors 12a to 12n from the dwelling unit receiver 14. In response to the fire confirmation signal, the transistor 24 is turned on, whereby the pair of lines SL and SC is short-circuited in a simulated manner, so that the same reception state as that issued by the fire detector side can be created on the dwelling unit receiver 14 side. I have to.

The dwelling unit receiver 14 includes a control unit 30, a reception circuit 32, a fire display unit 34, and an operation message output unit 3.
6. Fire message output unit 38 and fire confirmation output unit 40
Is provided. The outdoor display 16 provided near the entrance door connected to the dwelling unit receiver 14 has a fire display 42 and a fire message output unit 4 using speakers or the like.
4 are provided.

The control unit 30 of the dwelling unit receiver 14 starts the timer 31 of the control unit 30 upon receiving the fire alarm from the receiving circuit 32 in the regular monitoring state, and sets the timer within the range of 2 to 5 minutes. The receiving circuit 32 continues for the set time of the timer 30.
When the alarm is received in the above, the fire display unit 34 displays a fire and the fire confirmation output unit 44 outputs a fire confirmation output to the receiver of the living room in the management room, and a fire message output unit 38.
Message output unit 4 in outdoor indicator 16
4 to output a fire message and a fire indicator 42 to display a fire. The operation message output unit 36 is activated when the control unit 30 receives a sensor alarm from the reception circuit 32, and performs an alarm display before a fire is determined.

Next, the external tester 18 will be described. First, a power supply circuit section 48 is provided. The power supply circuit section 48 includes a battery 50, a charging circuit 52, a charging lamp 54, a voltage monitoring circuit 5,
6, a charging lamp 58, a power switch 60 and a power lamp 62 are provided. For example, a lithium battery or the like is used as the battery 50, and the battery 50 can be charged by connecting an appropriate charger such as an AC adapter to the charging circuit 52.

During the charging, the charging lamp 54 is turned on. The voltage of the battery 50 is monitored by a voltage monitoring circuit 56.
Lights up. When the fire detector is tested by the external tester 18, the power switch 60 is first turned on. When the power switch 60 is turned on, the power lamp 62 is turned on. A control circuit 46 is provided as a test circuit unit of the external tester 18. Further, for the control circuit 46, a test signal sending circuit 64, a test signal voltage control circuit 66, a termination signal detection circuit 6
8, DC / DC converter 70, fire signal detection circuit 7
2. Test fire signal detection circuit 74, confirmation signal transmission circuit 7
6. A signal transmission circuit 78 during the test is provided.

As a control function of the control circuit 46, a test timer 100 having a set time T1, an abnormality judging timer 102 having a set time T2, and a fire having a set time T3 for monitoring various times required for a test. Judgment timer 104
Is provided. As an operation display unit for the control circuit 46, a test start switch 82, a test end switch 84,
A mode changeover switch 86, a test lamp 88, a test result display lamp 90, a fire lamp 94, and a buzzer 95 are provided.

Further, a sensor connection jack 65 is provided on the connection terminal side of the pair of lines L and C and the test signal line QA from the repeater 10, and a sensor base is connected to the sensor connection jack 65 by a plug. By attaching the sensor body to the sensor base, it is possible to test the fire sensor alone. This test of the fire detector alone is not limited to the detector base,
A detector connection jig for directly connecting a fire detector with an alligator clip is also good.

FIG. 2 is an explanatory view of the external tester 18 shown in FIG. 1. A power switch 60 is provided on the right side of the lower operation panel.
Is provided. When the power switch 60 is turned to the ON position, the power lamp 62 is turned on, and the test operation becomes possible. A test start switch 82 is provided on the right side of the power switch 60, that is, at the center.
And a test end switch 84. When the test start switch 82 is operated, the under test lamp 88 is turned on.

When the test end switch 84 is pressed during the test, the test can be ended. A mode switch 86 is provided above the power switch 60. The mode changeover switch 86 can select three modes: a normal test mode, a repetitive test mode, and a dwelling unit receiver test mode. The normal test mode is a “localized” switching position at the center of the mode switch 86, and performs the first to last test operations of the fire detectors 12a to 12n in FIG.

The repetition test mode is a switching position of the "repetition test" in which the mode changeover switch 86 is switched upward, and when the test of the fire detectors 12a to 12n of FIG. . Further, the dwelling unit receiver test mode is the “GP3 test” below the mode switch 86. In this dwelling unit receiver test mode, the dwelling unit receiver 14 shown in FIG. Confirmation of the transfer operation and the alarm operation of the outdoor display 16 can be performed by the external tester 18.

A test result indicator lamp 90 is provided on the left side of the mode change switch. The test result indicator light 90 flashes green if it is normal, and flashes red if it is abnormal. Below the test result indicator 90, a failure sensor number indicator 80 is provided.
Is provided. The failure detector number display 80 uses a two-digit seven-segment display, and displays the number of the fire detector for which an abnormality was determined during the test.

Further, the operation panel is provided with a charging light 58 and a fire light 94. The fire lamp 94 switches to a lighting state when an actual fire is determined during the test. FIG. 3 is FIG.
It is a circuit diagram of the fire detectors 12a to 12n. In FIG. 3, following terminals L and C to which a pair of lines from the repeater 10 are connected, a noise removal and reverse connection prevention circuit including capacitors C18 and C19 and a diode D1 are provided, and then a zener diode ZD1 is provided. And a circuit section for stabilizing the power supply voltage by the capacitor C1.

Subsequently, a transistor Q1 is provided. When the transistor Q1 is turned on, an alarm current flows between the terminals L and C, and an alarm current for outputting a fire signal flows to the repeater 10 side. An alarm indicator 112 is connected to the collector of the transistor Q1. A switching transistor Q2 is provided on the base side of the transistor Q1, and the base of the transistor Q2 is connected to the thermistor T via a resistor R5.
It is connected to a sensing circuit 114 using H. Sensing circuit 11
Numeral 4 is supplied with power from a constant voltage circuit including a transistor Q3, differentially connects the transistors Q7A and Q7B, and connects a thermistor TH, which changes in resistance value by receiving heat from a fire, to the base of the transistor Q7B. doing.

In the steady monitoring state, the sensing circuit 114
The transistor Q7B is turned on and the transistor Q7A is turned off. However, when the temperature exceeds a predetermined fire detection temperature, the resistance value of the thermistor TH decreases and the transistor Q7B turns off. Conversely, the transistor Q7A turns on and the transistor Q7A turns on. Q2 is turned on, and the transistor Q
By turning on 1, an alarm current flows between the pair of terminals L and C.

A switching circuit 110 is provided for the input test signal line terminal QA and the output test signal line terminal QB provided for testing the fire detector. Switching circuit 110 includes transistors Q4, Q5, Q41
Is provided. During the test, the repeater 10 is connected to the input test signal line terminal QA from the tester 18 of FIG.
, A test signal of 12 volts is applied. This test signal is supplied via resistors R9 and R11 to the base of the transistor Q provided on the transistor Q7A side of the sensing circuit 114 via resistors R15 and R16 to turn on the transistor Q6. For this reason, the transistor Q7A is forcibly turned on, and an alarm current flows between the terminals L and C when the transistors Q2 and Q1 are turned on.

In the switching circuit 110,
When 12 volts is applied to the input test signal line terminal QA, the transistor Q1 turns on, and the base of the transistor Q4 connecting the input test signal line terminal QA and the output test signal line terminal QB is biased to the off state. Accordingly, the off state of the transistor Q4 is maintained. Transistor Q
When the fire alarm is fired by turning on 1, the resistor R 13,
A base current is supplied to the transistor Q5 of the switching circuit 110 via R14, and the transistor Q5 turns on. When the transistor Q5 turns on, the transistor Q5
4 is pulled in through the resistor R11, the transistor Q4 is turned on, and 12 volts of the test signal for the input test signal line terminal QA is output from the test signal line terminal QB for output through the transistor Q4. Output a 12 volt test signal. A circuit including the transistors Q4 and Q5 serves as a first switching circuit of the switching circuit 110.

On the other hand, when there is an abnormality such as a disconnection of the thermistor TH in the fire detector 12, even if 12 volts is applied as a test signal to the input test signal line terminal QA or the transistor Q6 is turned on. Transistor Q7A
Is in an off state, and a test report cannot be issued by turning on the transistors Q2 and Q1. Therefore, the transistor Q4 cannot be turned on when the transistor Q5 is turned on by the alarm current flowing when the transistor Q1 is turned on, and a 12-volt test signal cannot be transmitted to the next fire detector.

In response to such an abnormality with respect to the test signal of the fire detector 12, the test device 18 of FIG. 1 issues a test report even after the set time T2 of the abnormality determination timer 102 of the control circuit 46 has elapsed. Is not detected, the test signal voltage control circuit 66 controls the test signal voltage control circuit 66 to reduce the voltage of the test signal from 12 volts to 8 volts. As described above, when the abnormality of the fire detector is determined and the voltage of the test signal for the input test signal line terminal QA drops from 12 volts to 8 volts, the base bias of the transistor Q41 which has been turned on at 12 volts is lowered and turned off. The bias is applied, and the transistor Q41 is turned off. Therefore, when the transistor Q41 is turned off, the cutoff of the transistor Q4 is released, the transistor Q4 is turned on, and a test signal can be transmitted to the next fire detector. When the transistor Q4 is turned on, the test signal returns from 8 volts to 12 volts again, and once the transistor Q4 is turned on once, the test signal of 12 volts is abnormal to the next fire detector to maintain the on state even if the transistor Q4 returns to 12 volts. Can be supplied even if the fire detector that caused the fire is on the way. A circuit including the transistor Q41 becomes a second switching circuit of the switching circuit 110.

Next, the external tester 1 in the embodiment of FIG.
8 will be described in detail together with the function of each circuit section. First, in preparation for testing the fire detectors 12a to 12n,
The external tester 18 shown in FIG. 2 is connected to the repeater 10 and the external tester 18 as shown in FIG. 1 using an attached cable. Subsequently, the power switch 60 of the external tester 18 is turned on.

At this time, the mode selector switch 86 is
Confirm that the camera is in the “localization” mode, which is the normal test mode, as shown in. Subsequently, when the test start switch 82 is pressed, the test lamp 88 is turned on, and the test is started. That is, when the test start switch 82 is pressed, the control circuit 46 causes the under test signal transmission circuit 7 to operate.
8 and the repeater 1 is connected by the signal lines ST and STC during the test.
A signal under test is output for 0, the lamp 26 under test provided in the repeater 10 is turned on, and the switching relay 28 is operated.

When the switching relay 28 is actuated, the switching relay contact ry1 switches to the side a shown in the figure, whereby the dwelling unit receiver 14 is disconnected from the fire detectors 12a to 12n and connected to the external tester 18 side. Also relay contact ry
When 2 is closed, a signal indicating that the test is being performed by the external tester 18 is output to the control unit 30 of the dwelling unit receiver 14 via the signal lines ST and STC during the test.

When the transmission processing of the under test signal is completed, the control circuit 46 activates the test signal transmission circuit 64, and performs a test between the test signal line QA and the common line C via the test signal voltage control circuit 66. Output a signal. The voltage of the test signal at this time is controlled to 12 volts DC from the DC / DC converter 70. The 12-volt test signal transmitted from the test signal transmission circuit 64 of the external tester 18 is first supplied to the fire detector 12a via the repeater 10.

As shown in the detector circuit of FIG. 3, the fire detector 12a includes resistors R9 and R9 of the switching circuit 110.
The transistor Q6 of the sensing circuit 114 is turned on via 11, R15 and R16, and the transistor Q7A is turned on to turn on the transistors Q2 and Q1. If the fire detector is normal, a test alert is issued. Referring again to FIG. 1, when the fire detector 12a issues a test report by a test signal, a report current flows between the pair of lines L and C, and the test fire signal detection circuit 74 of the external tester 18 causes the test report. To detect
The detection result is output to the control circuit 46. The control circuit 46 has a counter 106 for counting the number of test alerts of the fire detector.
When the detection output of the test fire signal detection circuit 74 is received, the counter 106 counts up by one.

In the fire detector 12a, when a test alert is issued, the transistor Q4 of the switching circuit 110 in FIG. 3 is turned on to turn on the transistor Q4 to send a test signal to the next fire detector. Next fire detector 12
A test signal is sent by sending a 12 volt test signal to b. In the same manner, when a test alert is issued to the last fire detector 12n, a test signal is finally output to the test terminating resistor 20, and the line current determined by the resistance value of the test terminating resistor 20 Is detected by the termination signal detection circuit 68 of the external tester 18, and the control circuit 46 recognizes the end of the test in response to the detection signal of the termination signal detection circuit 68. In this case, since there is no abnormal fire detector, the test result indicator 90 is lit green indicating normal.

At the same time, the control circuit 46 sends the confirmation signal sending circuit 7
6 and activate the repeater 10 via the confirmation signal signal line OK.
Output a confirmation signal to Upon receiving this confirmation signal, the transistor 24 of the repeater confirmation alarm circuit 25 is turned on, and an alarm current flows between the pair of lines SL and SC from the dwelling unit receiver 14, and the reception circuit 32 receives the alarm signal. Based on the control unit 30,
The lighting of the fire indicator 42 provided on the outdoor indicator 16 and the output of the fire message by the fire message output unit 44 are performed.

At this time, since the control unit 30 receives the test-in-progress signal when the relay contact ry2 of the repeater 10 is turned on, the control unit 30 knows that the test report has been received. The fixed output is prohibited and the fire message is not output in the dwelling unit. Note that the control unit 30 uses the fire determination output unit 40 to
The fire determination output is performed to the living building receiver 14. For this reason, it can be tested whether or not the transfer operation of the receiver 14 for a residential building is normal.

When the display of the test result and the transmission of the confirmation signal are completed in the external tester 18, the test operation is completed and the initial operation is completed when a set time T1, for example, T1 = 90 seconds, of the test timer 100 provided in the control circuit 46 has elapsed. Reset to state.
The stop of the test operation can be ended by operating the test end switch 84 within the set time T1 of the test timer 100.

FIGS. 4A to 4I are timing charts of the test operation by the external tester 18 when the fire detectors 12a to 12n in FIG. 1 are normal. First, when the power is turned on by the power switch 60 in FIG. 4A and the test start switch 82 in FIG. 4B is operated, the in-test signal E1 is output as shown in FIG. 4C. Subsequently, the test signal E2 shown in FIG. 4D is output, and a test operation is performed. In response to this, as shown in FIG. Test fire signal E3 from number 1
As shown in FIG.

When the test issuance of all the fire detectors is completed, the termination signal E is detected by the termination signal detection circuit 68 as shown in FIG.
4 is obtained, and based on this, the confirmation signal E5 of FIG.
A fire display for confirmation in 6 is performed. In addition, the test result indicator flashes, for example, green a plurality of times, as shown in FIG. In this case, the test is ended by pressing the test end switch 84 in FIG.

Next, a description will be given of a test operation when an abnormality such as a thermistor disconnection occurs in any of the fire detectors 12a to 12n. The test procedure in the external tester 18 is the same. Even if a test signal is supplied to the fire detector having an abnormality based on the test report of the preceding fire detector, the test report is performed abnormally. Absent. That is, in the fire detector 12 of FIG. 3, for example, when the thermistor TH is disconnected or the alarm indicator 112 is cut off, the transistors Q6, Q7A, Q2,
No test alert is issued when Q1 is turned on.

The control circuit 46 of the external test device 18 shown in FIG.
Is determined based on the set time T2 of the abnormality determination timer 102 provided in the first timer. That is, when the test fire signal detection circuit 74 receives a test fire signal based on a test notification of a normal fire detector at the preceding stage, the abnormality determination timer 102 is started, and the set time T2, for example, T2 = about 0.15 seconds. If the test fire signal from the next test report is not obtained even after elapse, it is judged that the fire detector under test is abnormal.

When the abnormality of the fire detector is determined in this way, the control circuit 46 flashes the test result display lamp 90 in red to indicate the abnormality, and simultaneously sounds the buzzer 95 to notify the abnormality of the detector. Based on the count value of the counter 106 at the time, the faulty sensor number is displayed on the fault sensor number display 8
0 is displayed, and the number of the fire detector causing an abnormality is displayed.

Further, the control circuit 46 controls the test signal voltage control circuit 66 based on the detection of the abnormality of the fire detector to lower the test signal from 12 volts to 8 volts. When the test signal drops from 12 volts to 8 volts,
The switching circuit 110 provided in the sensor circuit of FIG. 3 in which the abnormality is occurring turns on the transistor Q4 when the transistor Q41 is turned off, and turns on the transistor Q4 even if no test alert is issued, so that the next fire detector is turned on. A test signal.

The control circuit 46 returns the test signal to the original 12 volts after the forced switching on the side of the fire detector in which the abnormality has occurred. For this reason, the test alert from the next normal fire detector is performed again. If an abnormality of the fire detector is determined during the test, the confirmation signal transmission circuit 76 does not transmit the confirmation signal to the repeater 10 based on the detection of the termination signal by the termination signal detection circuit 68.

FIGS. 4 (J) to 4 (M) are timing charts in the case where the sixth fire detector is determined to be abnormal in the fire detector test by the external tester 18. FIG. That is, FIG.
Looking at the fire signal E3 in (J), a test signal was issued normally up to the fifth, but no signal was issued within the set time T2 of the abnormality determination timer 102 at the sixth fire sensor. At this point, it is determined that there is an abnormality, and the test result display lamp shown in FIG. 4 (K) blinks in red to indicate the abnormality and the buzzer 94 shown in FIG. 4 (L) outputs an alarm sound.

Further, as shown in FIG. 4 (M), by controlling the test signal voltage from 12 volts to 8 volts for a predetermined time by the operation of the test signal voltage control circuit 66, the switching circuit 110 of the abnormal fire detector is activated. It is forcibly turned on to send a test signal to the next fire detector. FIG.
In the operation at the time of abnormality of the fire detector of (J) to (M), when the abnormality of the fire detector is determined, the test result indicator 90 flashes red and the abnormality of the detector number indicator 80 occurs. The sensor number is displayed, but at this point the results of the abnormality judgment are stored and retained, and the test results are displayed and the fault is detected at the timing when the end of the test issuance of all fire detectors and the end signal is obtained. The device number may be displayed.

However, even if there are 10 fire detectors, the time required for the test operation from the beginning to the end is only a very short time of 1 second or less. An abnormality alarm display may be performed, or an abnormality detection display may be performed after a test alert has been issued to the end, and it is almost indistinguishable from human eyes, and either may be used.

Next, the operation when a fire actually occurs during the test will be described. Fire detector 1 using external tester 18
If a fire occurs during the test of 2a to 12n, a fire alarm signal from the fire detector that has detected the fire continuously outputs a signal to the external tester 18.
Supplied to The alarm signal is detected by the fire signal detection circuit 72 due to the actual fire. Specifically, the set time T3 of the fire determination timer 104 provided in the control circuit 46
When a fire detection signal is continuously obtained over a period of time, it is determined that the sensor has been triggered by an actual fire. When an actual fire is determined in this way, the test operation is stopped, and the confirmation signal transmission circuit 76 is operated to continuously transmit a confirmation signal to the repeater 10.
, And the alarm receiving operation by the dwelling unit receiver 14 is performed. At this time, the under-test signal from the under-test signal transmission circuit 78 is released, so that the switching relay RY is restored, the switching relay contact ry2 is opened, and the inhibition of the fire determination output by the under-test signal to the control unit 30 is released. Dwelling unit receiver 1
4 receives the continuation of the alarm reception by the timer 31 for a set time, activates the fire confirmation output unit 40, causes the fire message output 38 to output the message from the outdoor display 16 and display the fire, Fire output is output to the building receiver.

Further, in the external tester 18 of the present invention,
When the mode changeover switch 86 is switched to the “repeated test” and the test start switch 82 is pressed, the fire detectors 12a to 12n can be repeatedly tested at a predetermined cycle, for example, at a cycle of 16 seconds. In the test in this repetitive mode, for example, the fire indicator light 112 of the fire detector is repeatedly turned on by the test operation every time the test is issued.
It can be used to check the lighting of. When the abnormality of the fire detector can be determined, the test mode is set repeatedly to search for the fire detector that does not have the alarm indicator 112, and the fire detector that has the abnormality known by the sensor number is detected. The task of finding is easy.

FIG. 5 shows a test process performed by the control circuit 46 provided in the external tester 18 shown in FIG. 1 in a case where the normal mode of “localization” is selected by the mode switch 86. First, the on operation of the test switch 82 is checked in step S1, and when the test switch is turned on, the process proceeds to step S2, in which a signal under test is output to the repeater 10 and the lines L and C of the detectors 12a to 12n are connected. Switch to the external tester 18 side.

Subsequently, in step S3, a test signal of 12 volts is transmitted. Subsequently, in step S4, the abnormality determination timer 10
2 and checks whether the set time T2 has been reached,
If a fire signal due to a fire signal is detected in the test alert in step S5 before the set time T2 has been reached, the counter 106 is counted up by one in step S6, and subsequently the fire determination timer 104 exceeds the set time T3 in step S7. Check if the fire signal continues.

If the fire signal is a test alert, set time T3
Since it is less than, the detection of the termination signal is checked in step S8. If the termination signal is not detected, the process returns to step S3, and the alarm test based on the transmission of the test signal of 12 volts is continued. In step S3, when the last fire sensor test report is completed and the end signal is detected, in step S9 it is determined that the sensor is not abnormal, and in step S10 a confirmation signal is sent to the repeater 10, and the outdoor display 16 Display fire at

Subsequently, the process proceeds to step S11, in which the test result indicator light 90 blinks green in a normal state, and the process proceeds to step S1.
In 2, a series of processing is terminated after the set time T 1 of the test timer 100 elapses or the test end switch 84 is turned on. On the other hand, if there is an abnormality in the fire detector during the test, in step S4, the elapsed time from the start of the test or the normal test notification of the previous fire detector is the abnormality determination timer 1
When the set time T2 of 00 is reached, it is determined that the fire detector is abnormal. In step S13, the test voltage is controlled from 12 volts to 8 volts, and the switching circuit 110 of the abnormal fire detector is forcibly switched. A test signal is output to the next fire detector, and at step S14, the counter 106
Is stopped with +1 counted up.

Then, the processing of steps S3 to S8 is repeated for the subsequent fire detector until the end signal is detected in step S8. When the end signal is detected, in this case, the sensor abnormality is determined in step S9, Step S
At 12, the end of the test is determined, and the process ends. On the other hand, if a fire actually occurs during the test, when the fire signal reaches the set time T3 of the fire determination timer 104 in step S7, the process proceeds to step S16 to stop the test operation, and in step S17 a confirmation signal is output. Is continuously transmitted, the alarm reception by the actual fire in the dwelling unit receiver 14 is continuously performed, the fire alarm display on the dwelling unit receiver 14 itself, and the fire alarm display on the outdoor display 16 are performed. In addition, an alarm display based on a fire determination output is made to the living room receiver provided in the management room.

Although the flow chart of FIG. 5 displays the sensor abnormality and the sensor number when the abnormality is detected, the abnormality display and the number are displayed when the last fire sensor test is completed as in the normal test. Display may be performed. The present invention is not limited by the numerical values shown in the embodiments.

[0068]

As described above, according to the present invention, a test signal is sent to the next fire detector even if a fire alarm installed in the dwelling unit is abnormal and a test alert is not issued. The test can be performed up to the last fire detector, and the problem that the test operation stops at the abnormal fire detector and the fire detector cannot be tested thereafter can be solved. In addition, when the abnormality of the fire detector is determined, the number of the fire detector in which the abnormality has occurred is obtained as a test result, which makes it easy to deal with after the test.

Further, when a fire actually occurs during the test, the test operation can be forcibly stopped to return to the normal fire monitoring state, and even if a fire occurs during the test, it is possible to reliably cope with the fire. Furthermore, by sending a confirmation signal to the receiver in the dwelling unit via the repeater after the fire detector test is completed,
The outdoor display can be operated and displayed on a trial basis,
Not only fire detectors, but also confirmation tests for repeaters, dwelling unit receivers and outdoor indicators can be performed.

Further, a sensor connection jig such as a sensor base is directly connected to the tester itself, and a terminating resistor is provided on the sensor base, thereby mounting the sensor body and testing the fire detector alone. Can be. Furthermore, in addition to the normal test mode, a repetitive test mode in which the test operation of a plurality of fire detectors is repeated can be set, so that, for example, the operation of a fire detector's alarm indicator lamp and the detection of a fire detector that has caused an abnormality can be set. Etc. can be easily performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a fire alarm system according to the present invention.

FIG. 2 is an explanatory view of a tester according to the present invention.

FIG. 3 is a circuit diagram of a fire detector used in the present invention.

FIG. 4 is a timing chart of a signal waveform by the tester of FIG. 2;

FIG. 5 is a flowchart of a test process of the present invention.

[Explanation of symbols]

 Reference Signs List 10: repeater 12a to 12n: fire detector 14: receiver for dwelling unit 16: outdoor indicator 18: external tester 20: terminal resistance for test 22: terminal resistance for disconnection monitoring 26: indicator light during test 28: switching relay Reference Signs List 30: control unit 32: receiving circuit 46: control circuit 48: power supply circuit unit 60: power switch 62: power lamp 64: test signal transmission circuit 65: sensor connection jack 66: test signal voltage control circuit 68: termination signal detection circuit 70: DC / DC converter 72: Fire signal detection circuit 74: Test fire signal detection circuit 76: Confirmation signal transmission circuit 78: Under test signal transmission circuit 80: Failure sensor number indicator 82: Test start switch 84: Test end switch 86: Mode changeover switch 88: Test lamp 90: Test result display lamp 94: Fire lamp 95: Buzzer 100: Test timer (T1) 02: anomaly determination timer (T2) 104: fire determination timer (T3) 110: switching circuit

Claims (16)

[Claims] 1. A plurality of fire detectors are connected in parallel between a pair of lines drawn through a repeater from a dwelling unit receiver installed in a dwelling unit, and further, a test signal drawn from the repeater. The plurality of fire detectors are connected to a line, a tester is connected to the repeater at the time of a test, and a test signal is sent from the tester to the test signal line to remotely test the plurality of fire detectors. In the fire alarm with remote test function, the fire detector operates according to the test signal input from the input test signal line, and when the test is issued, sends the test signal to the output test signal line. A switching circuit that outputs a signal, and further connects a terminator to an end of the fire detector connected by a test signal line, wherein the repeater receives a signal during the test from the tester during a test, and the fire detector A pair of connected tracks for the dwelling unit A relay circuit section for switching connection from a transceiver to the tester side, wherein the tester sends a signal during the test to the repeater during a test and sends a test signal to the test signal line to detect the fire. The test devices are sequentially tested, the test report signal from the fire detector is taken in via the repeater, the number of test reports is counted and stored, and the test report signal from the fire detector is received. If the test alert signal from the next fire sensor is not received within a certain period of time after that, the fire sensor under test is determined to be abnormal and the test signal is supplied to the next sensor. And a tester circuit for displaying which fire detector is abnormal based on the stored value of the counter if there is an abnormality in the fire detector. Fire alarm with test function. 2. The fire alarm system with a remote test function according to claim 1, wherein the test circuit of the tester determines the voltage of the test signal when the abnormality of the fire detector under test is determined. A test voltage control circuit for lowering the test signal to a predetermined value, wherein the switching circuit of the fire detector is configured to perform a first switch for transmitting a test signal to a next-stage fire sensor based on a test notification of the fire detector based on the test signal. And a second switching unit for detecting a drop in the test voltage and forcibly sending a test signal to the next-stage fire detector even when the test is not in a test alert state. Fire alarm equipment. 3. A fire alarm system with a remote test function according to claim 2, wherein said fire detector generates an alarm current flowing between said pair of lines by an alarm operation upon receiving said test signal. Then, after the lamp is turned on and turned on by the fire indicator lamp, it is sent to the switching circuit to perform a switching operation. Even when the alarm indicator lamp is abnormal, the fire detector is not fired and the test device side is not fired. A fire alarm system with a remote test function, characterized in that it is possible to judge that an abnormality has occurred. 4. A fire alarm system with a remote test function according to claim 1, wherein the test circuit section of the tester is configured to detect when a test current flows through a terminating resistor connected to an end of the test signal line. A fire alarm system with a remote test function, comprising a termination signal detection circuit for detecting a signal level, judging that a test signal has been supplied to all fire sensors, and terminating the test. 5. The fire alarm system with a remote test function according to claim 1, wherein the test circuit section of the tester is configured to execute a test alarm signal from the fire detector for a predetermined time or more.
A fire alarm system with a remote test function, which is equipped with a fire signal detection circuit that performs an actual fire process by judging that a fire detector has triggered an actual fire. 6. The fire alarm system with a remote test function according to claim 5, wherein the test circuit of the tester stops the test and returns the repeater to the normal monitoring state as the actual fire processing. A fire alarm system with a remote test function, in which a fire alarm is issued and the tester itself displays the fire alarm. 7. A fire alarm system with a remote test function according to claim 1, wherein the test circuit section of the tester issues a fire alarm test test to the last fire sensor and ends the normal test. A remote test function characterized by a switching function between a test mode and a repetitive test mode in which the test signal of the fire detector is sent to the end and the test signal is transmitted again without terminating and the test operation is repeated. Fire alarm equipment. 8. The fire alarm system with a remote test function according to claim 1, wherein the test circuit of the tester further switches a test mode for testing an alarm function of a receiver for a dwelling unit in a dwelling unit. Fire alarm equipment with remote test function characterized by having functions. 9. A plurality of fire detectors are connected in parallel between a pair of lines drawn through a repeater from a receiver for a dwelling unit installed in a dwelling unit, and further a test signal drawn from the repeater. A tester for connecting the plurality of fire detectors to a line, connecting to the repeater during a test, transmitting a test signal to the test signal line, and remotely testing the plurality of fire detectors. A test signal is sent to the repeater during the test, and a test signal is sent to the test signal line to test the fire detector. A test alert signal from the fire detector is sent through the repeater. Counts and stores the number of test alerts, and does not receive the test alert signal from the next fire detector even if a predetermined time has elapsed after receiving the test alert signal from the fire detector In this case, the fire detector under test is A test circuit for controlling a test signal so as to supply a signal to a next sensor, and further indicating which fire detector is abnormal based on the stored value of the counter if there is an abnormality in the fire detector. A test device comprising a part. 10. The tester according to claim 9, wherein the test circuit unit reduces the voltage of the test signal to a predetermined value when the test circuit unit determines that the fire detector under test is abnormal. A test device, comprising: a test voltage control circuit for forcibly switching the fire detector to a state in which a test signal is transmitted to a next-stage fire detector even when the fire detector is not in a test alert state. 11. A tester according to claim 9, wherein said test circuit detects a signal level when a test current flows through a terminating resistor connected to a terminating end of said test signal line, and detects all signal levels. A test device comprising: a termination signal detection circuit that determines that a test signal has been supplied to a fire detector and terminates the test. 12. The test device according to claim 9, wherein the test circuit unit is configured to generate a fire signal of the fire sensor due to an actual fire when the test alert signal from the fire sensor continues for a predetermined time or more. A test device comprising a fire signal detection circuit for performing a real fire process upon judging that the information is an alarm. 13. The tester according to claim 12, wherein the test circuit section stops the test and returns the repeater to a normal monitoring state to perform a fire alarm as the actual fire processing. A test device characterized by displaying a fire alarm by itself. 14. A test apparatus according to claim 9, wherein said test circuit section performs a normal test mode in which a fire alarm test is issued to the last fire sensor and ends, and a fire sensor test. A tester having a function of switching to a repetitive test mode for repeating a test operation by sending a test signal again without terminating after issuing an alarm to the end. 15. A tester according to claim 9, wherein said test circuit further comprises a test mode switching function for testing an alarm function of a dwelling unit receiver in a dwelling unit. Tester. 16. The tester according to claim 9, further comprising a test terminal for directly connecting a sensor connection jig provided with a terminator to a tester main body, wherein the sensor connection jig connected to the test terminal is provided. A tester characterized in that a test is performed with the fire detector alone with the detector body attached to the tool.