JPH1069587A - Fire alarm system with remote test function - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to understand the fire history of a fire detector in an operation test to which a remote tester is connected. In addition, when a remote test is performed, an abnormal fire detector can be easily identified. A plurality of fire detectors (S) connected to a detector line (L) are connected to a fire receiver (R) through a repeater (T) with test terminals.
And a remote tester RC, each of the plurality of fire detectors S is provided with storage means 14 for storing alarm data, and the remote tester RC has a test terminal. Connected to the attached repeater T, makes an inquiry to an arbitrary fire sensor S, and makes an inquiry to the sensor data taking means 1 which takes in the alarm data stored in the storage means 14 of the fire sensor S. And an alarm data display means 2 for displaying alarm data of the fire detector S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in a fire alarm system having a remote test function.

[0002]

2. Description of the Related Art Conventionally, automatic fire alarm systems have been introduced in buildings and condominiums, and a fire detector installed in a management room or the like monitors a fire detector installed in each room or dwelling unit. However, when a fire detector issues a warning, a fire lamp is turned on, a fire alarm is output, and the like, a fire is reported to evacuate dwellers and the like.

[0003] This fire alarm system has been developed so that a remote tester can be used to perform a remote test of a fire detector, whereby a fire detector installed in a dwelling unit can be used even when a dweller is not present. It can be tested, and can also be used to test fire detectors in areas where testers cannot access. FIG. 8 is a schematic diagram for explaining a fire alarm system having a remote test function.

In a fire monitoring system for an apartment house, a plurality of fire detectors S installed in a dwelling unit are connected via a detector line L to a repeater T with test terminals outside.
The repeater T with a test terminal is also connected to the fire receiver R, so that the fire detector S can detect and discriminate the alarm of the fire detector S during normal fire monitoring.

[0005] When testing each fire detector S, a remote tester RC is connected to a repeater T with test terminals. Then
The switching contact 3 of the repeater T with a test terminal cuts off the connection between the detector line L and the fire receiver R and connects the detector line L to the remote tester RC. The fire detectors S are designated, and an alarm command signal (test signal) is transmitted in order to force each fire detector S to emit an alarm.

The remote tester RC monitors the response from the fire alarm signal S which has sent the alarm command signal, and when the alarm is confirmed, determines that the status is "normal" and turns on the display LED. If there is no alarm operation, it will be judged as "abnormal"
Is turned on, an operation test can be performed by observing this difference. In such a system, unlike a conventional fire alarm system, without performing a so-called "burn test" that generates smoke or heat immediately below the fire detector S,
The function test of the fire detector S can be performed from outside.

FIG. 8 is an external view of the remote tester used at this time. The remote tester RC includes a cable CN with a connector for detachably connecting to the repeater T with a test terminal, and includes a display LED corresponding to the address of the fire detector S. When the remote tester RC receives the alarm signal to which the address is added via the cable CN with the connector, the display LED corresponding to the address is displayed.
“1” to “10” are turned on, and the address of the normal fire detector S is displayed. Therefore, the tester has the remote tester R
If C is connected to the repeater T with a test terminal, the test result can be confirmed by checking the lighting mode of the display LED.
The fire detector S in the dwelling unit can be tested from the outside. If an abnormality of the fire detector S is found by such a test, the fire detector S is inspected and repaired.

[0008]

However, in the above-mentioned conventional fire alarm system, when a fire detector emits an alarm and this is detected by a fire receiver, the alarm from the fire detector is a false alarm. In this case, the contractor who came to check after the fire detector was restored could not confirm that the fire detector was indeed alarming, and because there was no evidence of the alarm, replacing the fire detector, In some cases, it took time to repair.

Further, in the test using the above-mentioned conventional remote tester, the distinction between the normal state and the abnormal state of the fire detector is displayed only in relation to the address assigned to the fire detector. Even if it is found, if multiple fire detectors are installed, replacement or repair is required unless the correspondence between the address and the installation location of the fire detector is checked using drawings etc. at the time of system construction Could not identify the fire detector to perform.

In order to solve such a problem, it is conceivable to turn on a confirmation light of a fire detector in an abnormal state. However, this confirmation light is turned on when an alarm is issued and recovery from a fire receiver is performed. If the remote tester is removed from the repeater with test terminal, if there is more than one fire detector with this confirmation lamp lit, the lighting current will be maintained if no operation is performed. There was a case that the fire receiver recognized it as an alarm.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a fire alarm system having a remote test function that allows a user to understand the fire history of a fire detector in an operation test to which a remote tester is connected. The first object is to provide It is a second object of the present invention to provide a fire alarm system having a remote test function capable of easily identifying an abnormal fire detector when a remote test is performed.

[0012]

In order to achieve the above object, a fire alarm system having a remote test function according to the present invention comprises the following means. According to claim 1, each of the plurality of fire sensors is provided with a storage means for storing alarm data. Therefore, when an alarm is issued by the fire sensor, the fact is sequentially stored in the storage means as an alarm history. You.

One remote tester, when connected to the repeater with test terminal, inquires about each fire detector and takes in the alarm data stored in the storage means of the inquired fire detector. Device data acquisition means, and alarm data display means for displaying the inquired alarm data. For this reason, in the present invention, the alarm data obtained by inquiring each fire detector from the remote tester,
By displaying on the display means, the tester can know the alarm history at a glance.

The present invention can be applied to a fire monitoring system for an apartment house in which a fire detector is installed in a room and a repeater with a test terminal is installed outdoors. It is not limited and can be applied to detached houses. In claim 2, the storage means of the fire detector is constituted by a nonvolatile memory. An EEPROM is best suited for this memory, according to which, for example,
Even if the power is turned off, the stored contents do not disappear.

According to a third aspect of the present invention, in each of the first and second aspects, each of the fire detectors is further provided with display means for discriminating and displaying the presence or absence of the alarm. By looking at the display means, it can be easily determined from outside. Here, as the display means, the light-emitting means such as an LED and the coloring means may be turned on and off as described in claim 4.

In place of or in addition to the display means for discriminating and displaying the presence / absence of the alarm, when a display command signal is received from the remote tester, the contents stored in the storage means are read and displayed. Means may be provided. Claim 5
No. 8 proposes a system in which, when an operation test of a fire detector is performed, if there is a fire detector that has an operation abnormality that does not generate an alarm, the fire detector can be easily identified.

In this case, the abnormality display means is displayed by sending a display command signal to the fire detector at the address after confirming the address of the inoperative fire detector with the remote tester. By seeing this display, a fire detector having an abnormal operation can be easily identified. In addition,
As the abnormality display means, a confirmation light conventionally provided in a fire detector may be used.

According to a sixth aspect of the present invention, the abnormality display means provided in the fire detector is realized by turning on the abnormality indicator lamp for a predetermined period of time at a fixed period when a display command signal is received by a remote tester. . As a result, even after the remote test is completed and the remote tester is detached from the repeater with test terminals, it can be easily visually identified from the outside. According to a seventh aspect of the present invention, the remote inspection sensor inspection circuit is configured to output a display cancellation signal for canceling the abnormality notification by the abnormality display means of the fire sensor from the remote tester side,
Thereby, the display by the abnormality display means of the fire detector in which the abnormality is confirmed can be sequentially released. In this case, the abnormality display means is only required to be a means capable of displaying the determination result, and is constituted by a light emitting means such as an LED, a coloring means, and the like.

This display means makes it easy to find an abnormal fire detector by turning on or off the light emitting means of the abnormal fire detector. Conversely, by turning on or off the light emitting means of the fire detector in the normal state, it is possible to easily find the fire detector in the abnormal state. Further, by associating the normal state with lighting, the abnormal state with blinking, and the non-connection state with lighting off, respectively, the three determination results can be distinguished and displayed by one display means. In addition, you may make it use the confirmation light of the fire detector which is conventionally provided as this light-emitting means.

According to the present invention, the fire detector further comprises a clock means for driving the abnormality display means at a predetermined cycle. Therefore, when the display command signal is sent from the remote tester to the fire detector. Is different, the timing of starting the driving of the abnormality display means is controlled differently for each fire detector. Even if there is more than one fire detector with abnormal operation, the display timing can be made different. When the fire detector is removed from the repeater with test terminal and returns to the state where the fire receiver and the sensor line are connected, a large amount of current flows through the detector line. There is no judgment.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a fire alarm system having a remote test function according to the present invention. In this fire alarm system, a plurality of fire detectors S are connected to a detector line L which is a multiplex transmission line, and this fire detector line L is connected via a repeater T with a test terminal having a switching contact 3. Connected to fire receiver R.

When the repeater T with test terminal is connected to the remote tester RC, the switching contact 3 cuts off the connection between the detector line L and the fire receiver R, and connects the remote tester RC to the detector line L. Is connected, but if the remote tester RC is disconnected, the sensor line L
Is connected to the fire receiver R so that normal monitoring and control by the fire receiver R is performed. Each fire detector S
, Different addresses are set in advance by a built-in dip switch or the like, and the fire detector S and the fire receiver R transmit and receive a multiplex transmission signal with these addresses.

LD is an alarm display means provided in each sensor S for discriminating and displaying the presence or absence of an alarm, and is constituted by an LED or the like. If it is not necessary to specify the fire detector that issued the alarm, a plurality of monitoring lines connecting the fire detectors S with no addresses are derived from the fire receiver R, and for each of the monitoring lines, It can be configured to monitor the alert of the fire detector. For example, if the alarm is detected based on the voltage change of each monitoring line, the circuit configuration of the fire detector S and the fire receiver R can be simplified.

The remote tester RC designates an address, makes an inquiry to the fire detector S, and fetches alarm data from the fire detector S. Alarm data display means 2 for display. Although not shown, the remote tester RC also includes a circuit for testing the fire receiver R.

In the present invention, the sensor data acquisition circuit constituting the sensor data acquisition means 1 inquires each fire sensor S by multiplex transmission, and makes each fire sensor S
The alarm data stored in the storage means (to be described later) is fetched, and the alarm data display means 2 displays the fetched alarm data. Here, the alarm data display means 2 is provided with a plurality of light emitting diodes in a simple configuration. In this case, each light emitting diode is provided corresponding to the address of the fire detector S. However, the alarm data display means 2 may be constituted by an LCD or the like so that alarm data (date and time of alarm) taken from the fire detector S can be displayed as character information.

As shown in the block diagram of FIG. 2, each fire detector S has a control circuit 10 composed of a CPU or the like.
And a power supply circuit 11 for controlling power supplied from the fire receiver R or the remote tester RC via the sensor line L.
A transmission / reception circuit 12 for performing multiplex transmission with the fire receiver R or the remote tester RC; a fire detection circuit 13 for detecting a fire by generating smoke or heat; and storage means for storing alarm data. And an LED for controlling the lighting of the LD for discriminating and displaying the presence or absence of the alert.
A lighting circuit 15 and the like are provided.

In the fire detector S, before the remote tester RC is connected to the repeater T with a test terminal, that is, when the alarm is issued in the normal fire monitoring state, the alarm data (date and time of the alarm) is transmitted. When the inquiry stored in the alarm history memory 14 is received from the remote tester RC, the alarm data stored in the alarm history memory 14 is returned. In response to the inquiry from the remote tester RC, if there is no fact that the report has been issued, the unreported report data is returned.
In this case, it is possible to accumulate the status of alarm and recovery sequentially with time and the like, so that the status can be returned to the remote tester RC.

Note that the alarm history memory 14 stores the EEPRO
Since it is composed of a nonvolatile memory such as M, even if the power supply from the power supply circuit 11 is stopped, the stored contents of the alert state do not disappear or change (claim 2). FIG. 3 shows a state of the fire alarm system of the present invention during a test. A fire monitoring system for an apartment house is configured. A repeater T with a test terminal is provided at an entrance or the like, and a plurality of fire detectors S are provided in a dwelling unit.
These fire detectors S include 1, 2, 3,.
n addresses are assigned, and the remote tester RC is provided with ten light emitting diodes 2a corresponding to the addresses "1" to "10", a check switch SW1, and an end switch SW2. In this example, the alarm data display means 2 is constituted by the light emitting diodes 2a.

When the lid of the repeater T with test terminal is opened, the cable CN with connector of the remote tester RC is connected, and the check switch SW1 is pressed, the remote tester RC inquires each fire detector S in order. When the fire alarm data is returned from each fire detector S, the state is displayed on the light emitting diode 2a. That is, in this figure, the lighting of the light emitting diodes 2a at "1", "2", and "6" causes
It indicates that the fire detector S corresponding to the address 1, 2, 6 has issued a warning in the past, and the lamps of the other light emitting diodes 2a are turned off. No alarm was issued or the detector line L
Is not connected.

Since the fire detector S is provided with the indicator light LD for discriminating and displaying the presence / absence of the alert, the presence / absence of the alert can also be directly determined by turning on the indicator lamp LD (claim 3). . In this manner, the tester can easily confirm whether or not the fire detector S in the room has issued an alarm by connecting the remote tester RC to the relay T with the test terminal outdoors. It is possible to enter the dwelling unit, find the fire detector S in which the indicator light LD is lit, and perform inspection and repair.

In the remote tester RC, when the end switch SW2 is pressed, all the light emitting diodes 2a of the remote tester RC are turned off and all the fire detectors S are turned off.
Is also turned off. Further, the light-emitting diode 2a and the indicator light LD are turned off by pulling out the cable CN with the connector of the remote tester RC from the repeater T with the test terminal, or by turning off the power of the remote tester RC. You can also. Thereby, the end switch S
Forgetting to operate W2, the light emitting diode 2a and the indicator light LD of the remote tester RC do not keep lighting.

In this example, the light emitting diode 2a and the indicator lamp LD are turned on. However, the light emitting diode 2a and the indicator light LD may be turned on and off. The alarm data (date and time of alarm) stored in the storage means may be converted into character information and displayed. Next, the system proposed in claims 5 to 8 will be described. In this system, when an operation test of a fire detector is performed by a remote tester, a non-operational fire detector can be easily identified from outside.

FIG. 4 is a block diagram showing the basic configuration of this system. The configuration of the remote tester RC is different from that of FIG.
In response to a response signal from the fire detector S that has sent out the alarm command signal, the detector inspection circuit 4 outputs an alarm command signal and a display instruction signal to an arbitrary fire sensor S when connected. Test result display means 5 for displaying test results.

Each of the plurality of fire detectors S has a function of forcibly activating the fire detection circuit 13 when a fire command signal is received from the remote tester to generate a fire, and also outputs the fire command signal. An abnormality display means LD 'is provided which is activated when a display command signal is received from the remote tester RC when a notification is not received. Here, in the example shown in FIG. 4, the abnormality display means LD 'is constituted by an LED, but this LED may also serve as an operation confirmation light as described above.

Next, the operation test of the fire detector S by the remote tester RC will be described in more detail. An alarm command signal is sent to the fire detector S, and if the alarm signal is returned from the fire detector S, it is determined to be normal, and if an abnormal signal such as a malfunction or failure is received, it is determined to be abnormal. Then, the test result is displayed on the test result display means 5 based on the judgment result. Here, the test result display means is provided with an LED corresponding to the fire detector as shown in FIG. 3, and is turned on when the fire detector S that has performed the operation test emits an alarm, and does not emit an alarm. In such a case, the light may be turned off. By checking the test result display means 5, the inspector can discriminate the fire detector S that did not issue a warning, that is, the fire detector S that has malfunctioned. A signal is sent out, and the abnormality indicator light L provided on the fire detector S
D 'can be turned on.

The indicator light LD 'can be set in various lighting modes in accordance with a normal state, an abnormal state, or no connection.
By watching the lighting of D ', it is possible to easily find the fire detector S having an abnormal operation. If the abnormality display means provided on the fire detector S is configured to be kept on or blinking for a predetermined period of time even after receiving the display command signal from the remote tester, the inspector operates even after the test. An abnormal fire detector can be easily determined (claim 6).

Further, if the abnormality display by the abnormality display means can be canceled by transmitting a display command cancel signal from the remote tester, the abnormality indicator lights of the fire detectors for which inspection has been completed are sequentially turned off. So you can
Replacement and repair work is facilitated (claim 7). Further, when there are a plurality of fire detectors indicating an abnormal operation, the fire detectors receiving the display command signal from the remote tester may be controlled to blink at different timings.

FIG. 5 shows the internal structure of a fire detector S used in such a system. The same reference numerals are given to portions corresponding to those in FIG.
Means L which drives the LED constituting the abnormality display means to blink.
The difference is that a clock circuit 16 for defining the drive timing of the ED lighting circuit 15 is provided. The clock circuit 16 periodically drives the LD ′ constituting the abnormality indicator lamp when a display command signal is received from the remote tester RC, and sends a clock signal to the control circuit 10 at a preset cycle. To drive the LED lighting circuit 15. Such a clock circuit 16 is connected to each fire detector S
If a sufficient clock period is provided, each fire detector S that receives a display command signal from the remote tester RC is driven at different timings due to different lighting start times of the LEDs. Since they do not overlap each other, the discrimination becomes easy.

FIG. 6 is a time chart showing the operation at this time. Here, the three fire detectors S of (a) to (c) periodically change the indicator light L according to the cycle t.
The lighting of D is repeated, but the starting time of the lighting cycle is
Since (b) is delayed by time t1 with respect to (a) and (c) is further delayed by time t2 with respect to (b), it can be seen that the lighting of each fire detector S does not overlap.

Therefore, according to such a configuration, even when the operation check lamp which is turned on at the time of a fire alarm is used as an abnormality display means and is driven to blink, after the remote test is completed, the remote tester RC is connected to the relay with test terminal. Even when the fire detector R is removed from the fire detector T and returns to the normal monitoring state in which the fire receiver R and the detector line L are connected, the fire detector R does not erroneously judge that the fire detector S has issued the alarm current.

[0041]

As can be understood from the above description, the fire alarm system having the remote test function of the present invention has the following effects. According to the first aspect, since the fire alarm state at the time of normal monitoring is stored in each fire detector, the remote tester is connected to the repeater with the test terminal to specify the fire detector. When the report data is captured, the report history can be known by displaying the captured report data in the report data display unit of the remote tester.
Therefore, by referring to the alarm history, inspection and repair of the fire detector becomes easy.

According to the second aspect, the means for storing the alarm status of the fire detector is constituted by a non-volatile memory, so that even when the power supply from the detector line is cut off,
The contents stored in the memory are not erased, and the fire history of the fire detector is not lost. According to the third aspect, the presence or absence of the alarm can be determined and displayed on the fire detector, so that the fire detector that has issued the alarm can be immediately recognized. Therefore, check the installation location of the fire detector while looking at the layout drawing, etc.
No need to repair.

According to the fourth aspect, the display of the fire detector is:
Since the alert status can be turned on in various modes, identification is easy. According to claim 5, when the operation test is performed by the remote tester, the fire detector having the operation abnormality is
By transmitting the display command signal after the operation test is completed, the abnormality display means reports the abnormality, so that it can be easily determined.

According to the sixth aspect, when the display command signal is transmitted from the remote tester, the fire detector turns on or blinks the abnormality indicator lamp for a certain period of time at a certain cycle.
Even after removing the remote tester from the repeater with test terminal, it is possible to easily determine the fire detector of the abnormal operation. According to the seventh aspect, the abnormality display means of the fire detector can release the display by transmitting the display command signal from the remote tester to perform the display, and then transmitting the display release signal. If the abnormal display of the fire detector whose inspection has been completed is sequentially released, the replacement and repair work of the fire detector can be easily performed.

According to the eighth aspect, the display timing of the test result of the fire detector can be shifted by the control signal transmitted from the remote tester. Even if there is more than one, the fire receiver may be mistaken for a fire alarm current and malfunction even if an operation confirmation lamp that lights up at the time of a fire alarm is used as an abnormal display means. Absent.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a configuration of a fire alarm system having a remote test function of the present invention.

FIG. 2 is a block diagram showing an example of a configuration of a fire detector (claim 1).

FIG. 3 is a diagram showing a procedure of a remote test.

FIG. 4 is a block diagram showing an example of a configuration of a fire detector (claim 5).

FIG. 5 is a block diagram showing another example of the fire detector (claim 8).

FIG. 6 is a time chart showing a basic operation of the fire detector shown in FIG. 5;

FIG. 7 is a schematic diagram for explaining a conventional fire alarm system having a remote test function.

FIG. 8 is an external view for explaining a conventional remote tester.

[Explanation of symbols]

 S: fire detector LD: alarm display means (indicator light) LD ': abnormality display means 10: control circuit 11: power supply circuit 12: transmission / reception circuit 13: fire Detecting circuit 14 ... Storage means (report history memory) 15 ... LED lighting circuit 16 ... Clock circuit RC ... Remote tester 1 ... Sensor data capturing means 2 ... Report Data display means 3 ・ ・ ・ Switching contact 4 ・ ・ ・ Detector inspection circuit 5 ・ ・ ・ Test result display circuit T ・ ・ ・ Relay with test terminal R ・ ・ ・ Fire receiver L ・ ・ ・ Sensor line

Claims (8)

[Claims] 1. A fire alarm system in which a plurality of fire detectors connected to a detector line can be selectively connected to a fire receiver and a remote tester via a repeater with a test terminal. Each of the fire detectors has storage means for storing respective alarm data, and the remote tester is connected to the repeater with test terminals, inquires of any fire detector, It is provided with sensor data capturing means for capturing alarm data stored in the memory means of the sensor, and alarm data display means for displaying alarm data of the inquired fire sensor. Fire alarm system with remote test function. 2. The fire alarm system according to claim 1, wherein the storage means of the fire detector comprises a nonvolatile memory. 3. A fire alarm system having a remote test function according to claim 1, wherein each of said fire detectors further comprises alarm display means for discriminating and displaying an alarm. . 4. The fire alarm having a remote test function according to claim 3, wherein the alarm display means of the fire detector is configured to identify whether or not the alarm is generated by lighting, blinking, and turning off. system. 5. The remote tester, wherein the remote tester is connected to a repeater with a test terminal, and outputs an alarm command signal and a display command signal to an arbitrary fire detector. Test result display means for displaying a test result returned from the fire detector that sent the signal, wherein each of the plurality of fire detectors receives a report command signal from a remote tester. In addition to the function to forcibly activate the fire detection circuit to generate an alarm, if no alarm is issued when an alarm command signal is received, an abnormal display is displayed when a display command signal is received from the remote tester. A fire alarm system having a remote test function configured to include an abnormality display unit for performing the alarm. 6. The abnormality detecting means of the fire detector according to claim 5, wherein, when receiving a display command signal from said remote tester, said abnormality detecting means turns on or blinks an abnormality indicating lamp for a fixed period of time at a fixed period to indicate an abnormal state. A fire alarm system with a remote test function configured to notify the user. 7. The remote inspection device according to claim 6, wherein the detector check circuit of the remote tester has a function of further outputting a display cancel signal for canceling the abnormality notification by the abnormality display means of the fire sensor. Fire alarm system. 8. The system according to claim 6, wherein the fire detector includes clock means for driving the abnormality display means at a predetermined cycle when receiving a display command signal from a remote tester. When a plurality of fire detectors receive a display command signal from the remote tester, the remote test function has a configuration in which the abnormality display means of each of the fire detectors is driven to blink at different timings to notify an abnormality. Fire alarm system.