JP2020086570A - Fire sensing system - Google Patents

Abstract

To rapidly notify of an abnormality while suppressing a crosstalk.SOLUTION: A fire sensing system includes: multiple repeaters 2 connected to a fire receiver 1; and one or more sensors 4 connected to the repeaters 2 so as to sense a fire. Multiple first timings arriving at respectively different times are allocated to each one of the multiple repeaters 2. Each one of the multiple repeaters 2 transmits a monitoring signal for requesting the sensor 4 to transmit a first response signal to be used for determining whether an abnormality indicating disconnection of a signal line or falling of the sensor 4 is occurring to the repeater 2, at the one first timing corresponding to the repeater itself. When a monitoring signal is received from the repeater 2, the sensor 4 transmits a first response signal to the repeater 2 at a second timing before new arrival of the first timing corresponding to the repeater 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to fire detection systems.

BACKGROUND ART Conventionally, in a fire detection system including an R-type fire receiver, a configuration is known in which a P-type fire detector, which is cheaper than an R-type fire detector, can be connected (for example, see Patent Document 1). FIG. 6 is a diagram showing an example in which a P-type fire detector is connected to a fire detection system including an R-type fire receiver. As shown in FIG. 6, a plurality of repeaters 102 are connected to the fire receiver 101. A plurality of P-type fire detectors 104 connected in a daisy chain are connected to each of the plurality of relays 102.

Japanese Patent No. 4683474

When a plurality of repeaters are connected to the fire receiver in the R-type automatic fire alarm system, the plurality of repeaters are accommodated in the repeater panel. In this case, there is a problem that a communication line between each of the plurality of repeaters and the P-type fire detector is close to each other, and interference is likely to occur at the position.

Also, in the automatic fire alarm system, disconnection of the signal line for sending and receiving signals to and from the fire detector and disconnection of the detector should be performed so that the fire alarm signal can be reliably received from the detector when a real fire occurs. Monitoring is being performed to see if any of the abnormalities shown are occurring. It is required to be able to quickly identify the occurrence of these abnormalities.

Therefore, the present invention has been made in view of these points, and an object thereof is to provide a fire detection system capable of promptly notifying occurrence of an abnormality while suppressing interference.

A fire detection system according to the present invention includes a plurality of relays connected to a fire receiver for notifying a fire prevention manager of the occurrence of a fire, and one or more detectors connected to the relays for detecting a fire. A fire detection system, comprising: each of the plurality of repeaters being assigned, as a signal transmission timing, a first timing that arrives at a different time in each of the plurality of repeaters, and receiving a signal. As the timing, a second timing that arrives at different times in each of the plurality of relays and arrives after the first timing is assigned, and each of the plurality of relays has one first timing. In order to determine whether or not the one or more sensors connected to the repeater have an abnormality indicating disconnection of a signal line to which the sensor is connected or disconnection of the sensor. A request unit for transmitting a monitor signal for requesting to transmit a first response signal used for transmitting the first response signal, and based on a reception situation of the first response signal from the one or more sensors for transmission of the monitor signal, A notification unit that determines whether or not an abnormality has occurred and notifies the fire receiver of the determination result, and when the sensor receives the monitoring signal from the repeater, It has a response part which transmits the 1st response signal to the relay concerned at the 2nd timing before the corresponding 1st timing newly arrives.

To each of the plurality of relays, a plurality of third timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, the plurality of third timings are assigned. A fourth timing that arrives at the same time and arrives later than the third timing is assigned to each of the repeaters, and the request unit is connected to the repeater at one of the third timings. When a test control signal is transmitted to the one or more sensors and the response unit receives the test control signal from the repeater, the fourth timing before the third timing newly arrives. A second response signal corresponding to the test control signal is transmitted to the repeater at a timing, and the notification unit receives the second response signal from the one or more sensors in response to the transmission of the monitoring signal. Based on the above, it may be determined whether or not the detector is operating normally, and the determination result may be notified to the fire receiver.

To each of the plurality of relays, a plurality of fifth timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, A sixth timing that arrives at the same time and arrives after the fifth timing is assigned to each of the repeaters, and the request unit is connected to the repeater at one of the fifth timings. When an acquisition request signal requesting that a third response signal is transmitted when the detector detects a fire, and the response unit detects a fire, When the acquisition request signal is received from the repeater, the third response signal is transmitted to the repeater at the sixth timing before the fifth timing newly arrives, and the notification unit causes the acquisition request to be transmitted. A detector that has detected a fire is identified based on the reception status of the third response signal from the one or more detectors for signal transmission, and information corresponding to the position of the detector is notified to the fire receiver. May be.

The notification unit is connected to the repeater when the detector that has detected a fire cannot be specified due to the interference of the third response signals transmitted at the same sixth timing in the one or more detectors. The fire receiver may be notified that a fire has been detected by at least one of the one or more sensors that are operating.

To each of the plurality of relays, a plurality of fifth timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, A sixth timing that arrives at the same time and arrives after the fifth timing is assigned to each of the repeaters, and the request unit is connected to the repeater at one of the fifth timings. When an acquisition request signal requesting that a third response signal is transmitted when the detector detects a fire, and the response unit detects a fire, When the acquisition request signal is received from the repeater, the third response signal is transmitted to the repeater at the sixth timing corresponding to the address of the sensor, and the notification unit transmits the acquisition request signal. May be identified based on the reception status of the third response signal from the one or more detectors to and the information corresponding to the position of the detector may be notified to the fire receiver. ..

According to the present invention, it is possible to quickly notify the occurrence of an abnormality while suppressing interference.

It is a figure which shows the structure of the fire detection system which concerns on this embodiment. It is a figure which shows the structure of the repeater which concerns on this embodiment. It is a figure which shows the structure of the sensor which concerns on this embodiment. It is a figure for demonstrating the communication timing allocated to the repeater and sensor concerning this embodiment. It is a sequence diagram which shows the flow of a process at the time of a fire detection in a fire detection system. It is a figure which shows the example which connected the P-type fire detector to the fire detection system provided with the R-type fire receiver.

[Outline of fire detection system S]
FIG. 1 is a diagram showing a configuration of a fire detection system S according to the present embodiment. The fire detection system S includes a fire receiver 1, a plurality of repeaters 2, and one or more detectors 4.

The fire receiver 1 is connected to a plurality of repeaters 2 via a transmission line L1. When the fire receiver 1 specifies that a fire is detected by at least one of the one or more detectors 4 via the relay device 2, the fire receiver 1 notifies the fire prevention manager of the occurrence of the fire.

The plurality of repeaters 2 are housed in the repeater panel 3, for example. Each of the plurality of repeaters 2 is connected to the fire receiver 1 via a transmission line L1 and is connected to one or more detectors 4 connected in a daisy chain via a detector line L2. ..

One or more detectors 4 are P-type fire detectors (on-off type fire detectors), and an address for identifying the detectors 4 is assigned in advance. When one or more detectors 4 detect a fire, the one or more detectors 4 notify the fire receiver 1 of a response signal including fire detection information indicating that a fire has been detected via the relay 2 and the address of the detector 4. Moreover, one or more sensor 4 will transmit the response signal with respect to a supervisory signal to the repeater 2, if a supervisory signal is received from the repeater 2.

Since the plurality of repeaters 2 are housed in the repeater panel 3, there is a problem that a part where the sensor line L2 is close to each other is generated and interference is likely to occur at the part. On the other hand, in the fire detection system S according to the present embodiment, each of the plurality of repeaters 2 is assigned a plurality of first timings that arrive at different times as signal transmission timings, and the signal reception timings are also assigned. Are assigned a plurality of second timings that arrive at different times. Each of the plurality of repeaters 2 transmits the monitoring signal to the sensor 4 at one first timing corresponding to the repeater 2.

When the sensor 4 receives the supervisory signal from the repeater 2, the sensor 4 responds to the supervisory signal at the second timing before the first timing assigned to the repeater 2 to which the sensor 4 is connected newly arrives. Is transmitted to the relay device 2. By doing so, the fire detection system S can quickly notify the occurrence of the abnormality while suppressing the interference of the response signal to the monitoring signal.
Next, the configurations of the relay 2 and the detector 4 included in the fire detection system S will be described.

[Structure of Repeater 2]
First, the configuration of the repeater 2 will be described. FIG. 2 is a diagram showing the configuration of the repeater 2 according to the present embodiment. The repeater 2 includes a first communication unit 21, a second communication unit 22, a storage unit 23, and a control unit 24.

The first communication unit 21 is a communication interface that communicates with the fire receiver 1 via the transmission line L1.
The second communication unit 22 is a communication interface that communicates with one or more sensors 4 via the sensor line L2.
The storage unit 23 includes a storage medium such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit 23 stores the program executed by the control unit 24.

The control unit 24 is, for example, a CPU (Central Processing Unit). The control unit 24 functions as the synchronization unit 241, the state change unit 242, the request unit 243, and the notification unit 244 by executing the program stored in the storage unit 23. Details of the functions of the state changing unit 242, the requesting unit 243, and the notifying unit 244 will be described later.

[Structure of sensor 4]
Next, the configuration of the sensor 4 will be described. FIG. 3 is a diagram showing a configuration of the sensor 4 according to the present embodiment. The sensor 4 includes a communication unit 41, a sensing unit 42, a storage unit 43, and a control unit 44.

The communication unit 41 is a communication interface that communicates with the repeater 2 via the sensor line L2. The sensing unit 42 senses the occurrence of fire.

The storage unit 43 includes a storage medium such as a ROM and a RAM. The storage unit 43 stores the address of the sensor 4 set by an address setter (not shown). The storage unit 43 also stores setting information that defines the timing at which the sensor 4 communicates with the repeater 2.
The control unit 44 is, for example, a control circuit and functions as a reporting unit 441 and a response unit 442. Details of the functions of the reporting unit 441 and the response unit 442 will be described later.

[Synchronization of repeater 2]
In the present embodiment, the repeater 2 uses various commands in order to detect a fire, monitor the disconnection of the sensor line L2 and the disconnection of the sensor 4, and test whether the sensor 4 operates normally. Is transmitted to the sensor 4 and a response signal corresponding to the command is received from the sensor 4.

First, a process of synchronizing the plurality of repeaters 2 will be described. The fire receiver 1 periodically transmits a synchronization signal to the plurality of repeaters 2. For example, the fire receiver 1 transmits a synchronization signal to the plurality of repeaters 2 at a cycle based on the number of repeaters 2 connected to itself.

When the synchronization units 241 of the plurality of repeaters 2 receive the synchronization signal from the fire receiver 1, the transmission timings of various signals (based on the time when the synchronization signal is received are based on the address assigned to itself) ( For example, the arrival time of the transmission timing of the first timing) is specified. Accordingly, the fire detection system S can set the first timing of transmitting the monitoring signal to different timings in each of the plurality of relays 2.

[Communication timing corresponding to each command]
Next, the transmission timing of various commands and the reception timing of response signals will be described. FIG. 4 is a diagram for explaining communication timings assigned to the repeater 2 and the sensor 4 according to this embodiment. In the example shown in FIG. 4, it is assumed that the fire receiver 1 is connected to the relays 2A, 2B, and 2C as the three relays 2 and the fire receiver 1 is not connected to the detector 4. .. Although not shown in FIG. 4, it is assumed that the synchronization signal is received before the time slot T0.

Each of the relays 2A, 2B, and 2C has a different communication time for transmitting a monitoring command for monitoring the disconnection of the sensor line L2 and the disconnection of the sensor 4 at different times. Is assigned to the first timing arriving at. Further, each of the repeaters 2A, 2B, and 2C arrives at different times as the communication timing for receiving the first response signal that is the response signal corresponding to the monitoring command, The second timing that comes after the first timing is assigned. In the present embodiment, the second timing is continuous with the first timing and comes immediately after the first timing.

In the example shown in FIG. 4, the first timing of the repeater 2A is time slots T0 and T18, and the second timing of the repeater 2A is time slots T1 and T19. The first timing of the repeater 2B is the time slot T6, and the second timing of the repeater 2B is the time slot T7. The first timing of the repeater 2C is the time slot T12, and the second timing of the repeater 2C is the time slot T13. The length of each time slot may be the same or different.

Each of the repeaters 2A, 2B, and 2C is assigned the third timing that arrives at the same time in each of the plurality of repeaters 2 as the communication timing for transmitting the test command that is the test control signal. ing. In addition, each of the relays 2A, 2B, and 2C arrives at the same time in each of the plurality of relays 2 as the communication timing for receiving the second response signal that is the response signal corresponding to the test command. , The fourth timing that comes after the third timing is assigned. In the present embodiment, the fourth timing is continuous with the third timing and arrives immediately after the third timing.

In the example shown in FIG. 4, the third timing is time slots T2, T8, T14, T20, and the fourth timing is time slots T3, T9, T15, T21.

In addition, as the communication timing for transmitting a fire location confirmation command, which is an acquisition request signal for confirming a fire location, to each of the relay apparatuses 2A, 2B, and 2C, the plurality of relays 2 arrive at the same time. The fifth timing is assigned. In addition, each of the relays 2A, 2B, and 2C arrives at the same time in each of the plurality of relays 2 as the communication timing for receiving the third response signal that is the response signal corresponding to the fire location confirmation command. However, the sixth timing that comes after the fifth timing is assigned. In the present embodiment, the sixth timing is continuous with the fifth timing and arrives immediately after the fifth timing.

The communication timing for receiving the command for fire location confirmation and the third response signal arrives at an earlier cycle than the cycle at which the communication timing for receiving the monitoring command and its response signal arrives. In the example shown in FIG. 4, the fifth timing is time slots T4, T10, T16, T22, and the sixth timing is time slots T5, T11, T17, T23.

[Processing for disconnection/dropout monitoring]
Next, the functions of the state changing unit 242, the requesting unit 243, and the notifying unit 244 included in the repeater 2 and the functions of the reporting unit 441 and the response unit 442 included in the sensor 4 will be described. First, the function related to the disconnection of the sensor line L2 and the dropout of the sensor 4 will be described.

The requesting unit 243 of the repeater 2 transmits a monitoring command to one or more sensors 4 connected to the repeater 2 via the sensor line L2 at one first timing. The monitor command is a signal requesting transmission of the first response signal. Here, the first response signal is used to determine whether or not there is an abnormality indicating a disconnection of the sensor line L2 to which the sensor 4 is connected or a drop of the sensor 4.

When the response unit 442 of the sensor 4 receives the monitoring command from the relay 2, the sensor 4 receives the monitoring signal at the second timing before the first timing corresponding to the relay 2 newly arrives. As the first response signal indicating that the ON signal is transmitted, the ON signal is transmitted to the relay device 2. Specifically, the response unit 442 transmits the first response signal to the repeater 2 at the time corresponding to the address assigned to the sensor 4 in the time slot corresponding to the second timing.

In the example shown in FIG. 4, the repeater 2A sends a monitoring command to one or more sensors 4 connected to the repeater 2A in time slots T0 and T18. Each of the one or more sensors 4 connected to the repeater 2A transmits the first response signal to the repeater 2A in the time slots T1 and T19 corresponding to the second timing of the repeater 2A.

The response unit 442 of each of the one or more sensors 4 transmits the first response signal to the relay 2A at different times in each of the time slots T1 and T19 based on the address of the sensor 4. For example, it is assumed that the number of sensors 4 is 32 and the time interval between the time slots T1 and T19 is 0.5 seconds. In this case, the time slots T1 and T19 are divided into time intervals (0.0156 second intervals) obtained by dividing the time interval (0.5 seconds) by the number (32 units). Each of the response units 442 of the one or more sensors 4 transmits the first response signal to the repeater 2A at a time interval corresponding to the address of the sensor 4 among the time intervals divided by the time slots T1 and T19. To do.

The notification unit 244 generates an abnormality indicating disconnection of the sensor line L2 and dropout of the sensor 4 based on the reception status of the first response signal from each of the one or more sensors 4 in response to the transmission of the monitoring command. Is determined. Here, the notification unit 244 may specify the disconnection position of the sensor line L2 and the dropout point of the sensor 4 based on the reception status of the first response signal.

The fire receiver 1 periodically transmits a state confirmation signal for confirming the state of the relay 2 to each of the plurality of relays 2. When the notification unit 244 receives the status confirmation signal from the fire receiver 1, the notification unit 244 notifies the fire receiver 1 of the determination result of whether or not an abnormality has occurred. When the notification unit 244 determines that the disconnection of the sensor line L2 and the dropout of the sensor 4 are detected, the notification unit 244 outputs the detection information indicating that the disconnection of the sensor line L2 or the dropout point of the sensor 4 is detected. Notify the fire receiver 1. Thereby, the fire receiver 1 can notify the fire prevention manager that a disconnection has occurred at the position where the sensor 4 corresponding to the address is installed or that the sensor 4 has fallen off. ..

[Treatment in case of test fire]
Next, the processing at the time of the test fire will be described.
First, the fire receiver 1 transmits a test signal as a control signal for a test fire to the plurality of repeaters 2. The test signal also includes the address of the repeater 2 to be tested.

When receiving the test signal from the fire receiver 1 including its own address, the request unit 243 of the repeater 2 transmits a test command, which is a test control signal, at one third timing.

The response unit 442 of the sensor 4 receives the test command from the repeater 2. Upon receiving the test command, the response unit 442 transmits the second response signal to the repeater 2. The response unit 442 transmits the second response signal to the repeater 2 at the fourth timing before the third timing newly arrives. Specifically, the response unit 442 transmits the second response signal to the repeater 2 at the time corresponding to the address assigned to the sensor 4 in the time slot corresponding to the fourth timing.

In the example shown in FIG. 4, the repeater 2A sends a test command to one or more sensors 4 connected to the repeater 2A in time slots T2, T8, T14 and T20. The one or more sensors 4 connected to the repeater 2A transmit the second response signal to the repeater 2A in the time slots T3, T9, T15 and T21 corresponding to the fourth timing. The response unit 442 of each of the one or more sensors 4 outputs the second response signal at a different time in each of the time slots T3, T9, T15, and T21 corresponding to the fourth timing based on the address of the sensor 4. It transmits to the repeater 2A.

The fire receiver 1 periodically transmits a state confirmation signal for confirming the state of the relay 2 to each of the plurality of relays 2. The notification unit 244 determines whether or not the one or more sensors 4 receive at least one second response signal at different times in the same time slot (for example, time slots T3, T9, T15, and T21). It is determined whether or not each of the detectors 4 is operating normally, and the fire receiver 1 is notified of the determination result. For example, when the notification unit 244 receives the status confirmation signal from the fire receiver 1, the notification unit 244 notifies the fire receiver 1 of information indicating the address of the sensor 4 that is not operating normally. Thereby, the fire receiver 1 can notify the fire prevention manager whether or not the detector 4 is operating normally.

[Processing when a fire is detected]
Next, the processing when a fire is detected will be described. FIG. 5 is a sequence diagram showing the flow of processing when a fire is detected in the fire detection system S.
When the sensing unit 42 senses the occurrence of a fire, the reporting unit 441 of the sensor 4 transmits an ON signal as a fire sensing signal indicating that the fire is sensed to the relay 2 (S11).

The storage unit 23 of the repeater 2 stores a possession value indicating whether or not a fire is detected. For example, when no fire is sensed, the value of the possessed value is "0x00", and when a fire is sensed, the value of the possessed value is "0xFF". Upon receiving the fire alarm signal from the sensor 4, the state changing unit 242 of the relay device 2 changes the value of the held value stored in the storage unit 23 from “0x00” to “0xFF” (S12).

When the value of the possessed value stored in the storage unit 23 is changed to “0xFF”, the request unit 243 of the relay device 2 has one or more of the one or more units connected to the relay device 2 at one fifth timing. A fire location confirmation command as an acquisition request signal is transmitted to the sensor 4 (S13-1, S13-2). The fire location confirmation command is a signal requesting that the third response signal be transmitted when the detector 4 detects a fire. In the present embodiment, the request unit 243 repeatedly transmits the fire location confirmation command at the fifth timing until receiving the third response signal from the same sensor 4 twice or transmitting the fire location confirmation command a predetermined number of times. ..

When the response unit 442 of the detector 4 receives the fire location confirmation command from the relay device 2 when the detector 42 detects a fire, the response unit 442 makes a third response at the sixth timing before the arrival of the fifth timing newly. The signal is transmitted to the repeater 2 (S14-1, S14-2).

In the example shown in FIG. 4, it is assumed that the value of the held value is changed to “0xFF” by the state changing unit 242 in the time slot T7. In this case, the requesting unit 243 of the repeater 2A transmits the fire location confirmation command to the one or more detectors 4 connected to the repeater 2A in the time slot T10, which is the earliest arriving fifth timing. Of the one or more detectors 4 connected to the repeater 2A, the detector 4 that detects the occurrence of the fire has the sixth timing before the time slot T16 when the fifth timing newly arrives. The third response signal is transmitted to the repeater 2A in the time slot T11. Specifically, the response unit 442 of the sensor 4 that senses the occurrence of the fire detects the first time at the time corresponding to the address assigned to the sensor 4 in the time slot T11 corresponding to the sixth timing. 3 response signal is transmitted to the repeater 2.

Further, the requesting unit 243 of the relay 2A transmits the fire location confirmation command to the one or more sensors 4 connected to the relay 2A at the time slot T16, which is the newly arrived fifth timing. Of the one or more detectors 4 connected to the repeater 2A, the detector 4 that is detecting the occurrence of the fire has the sixth timing before the time slot T22 when the fifth timing newly arrives. The third response signal is transmitted to the repeater 2A in the time slot T17.

Since the cycle in which the fifth timing and the sixth timing arrive is shorter than the cycle in which the first timing to the fourth timing arrive, the repeater 2 sets the place where the fire occurred to the place where another abnormality occurred. It can be identified more quickly. Further, although the fifth timing and the sixth timing are shared by the plurality of relays 2, the plurality of relays 2 hardly transmit the fire location confirmation command at the same time, and thus the interference is extremely likely to occur. It is possible to send a fire location confirmation command without sending.

Although the response unit 442 transmits the third response signal to the repeater 2 at the sixth timing before the fifth timing newly arrives, the present invention is not limited to this. When the response unit 442 receives a fire location confirmation command from the repeater 2 while detecting a fire, the response unit 442 outputs the third response signal at the sixth timing corresponding to the address assigned to the detector 4. 2 may be sent.

In this case, the request unit 243 transmits the fire location confirmation command at an interval longer than the arrival of the fifth timing. In the example shown in FIG. 4, the request unit 243 transmits the fire location confirmation command in the time slots T10 and T22.

For example, when the end of the address of the sensor 4 is an odd number, the response unit 442 transmits the third response signal to the relay 2 at the sixth timing that comes immediately after the fifth timing, and the address of the sensor 4 is detected. When the end is an even number, the third response signal is transmitted to the repeater 2 at the sixth timing that comes immediately after the newly arrived fifth timing. In the example shown in FIG. 4, the response unit 442 of the sensor 4 having an odd number of addresses transmits the third response signal in the time slot T11, and the response unit 442 of the sensor 4 having an even number of addresses has a time The third response signal is transmitted in slot T17. By doing so, it is possible to prevent one or more sensors 4 from simultaneously transmitting the third response signal and causing interference.

The notification unit 244 identifies the sensor 4 that has detected the fire based on the reception status of the third response signal from the one or more sensors 4 in response to the transmission of the fire location confirmation command, and corresponds to the position of the sensor 4. The fire location information is notified to the fire receiver 1. Specifically, first, when the notification unit 244 continuously receives the third response signal from the same sensor 4, the notification unit 244 identifies the fire place as the position where the sensor 4 is installed (S15). The notification unit 244 causes the storage unit 23 to store the address of the sensor 4 included in the third response signal as fire location information.

The notification unit 244 receives a state confirmation signal for confirming the state of the repeater 2 from the fire receiver 1 at predetermined intervals (S1-1, S1-2, S1-3). When the notification unit 244 receives the status confirmation signal, when the value of the holding value stored in the storage unit 23 is “0x00” indicating that no fire has occurred, the notification unit 244 includes a normal signal including the holding value. Is transmitted to the fire receiver 1 (S2-1).

When the notification unit 244 receives the status confirmation signal and the value of the possessed value is “0xFF” indicating that a fire has occurred, and the storage unit 23 does not store the fire occurrence location information. Then, a fire detection signal including the possessed value and location unidentified information indicating that the location where the fire has occurred is not identified is transmitted to the fire receiver 1 (S2-2, S2-3). Further, when the notification unit 244 receives the status confirmation signal, when the value of the possessed value is “0xFF” indicating that a fire has occurred, and the storage unit 23 stores the fire place information. , The fire detection signal including the possessed value and the location specifying information indicating that the location where the fire has occurred is transmitted to the fire receiver 1 (S2-4).

When the fire receiver 1 receives the fire detection signal including the possessed value and the location specifying information from the relay device 2, the fire receiver 1 transmits a state confirmation signal, which is an extended transmission signal indicating the confirmation of the fire location, to the relay device 2 ( S3).

When the notification unit 244 receives the status confirmation signal as the extended transmission signal, the notification unit 244 transmits the fire location signal indicating the fire location information stored in the storage unit 23 to the fire receiver 1 (S4). When the fire receiver 1 receives the fire place signal from the relay device 2, the fire receiver 1 notifies the fire place by displaying the fire place on a display unit (not shown) based on the fire place signal ( S5). Thereby, the fire receiver 1 can notify the fire prevention manager that a fire has occurred at the position where the sensor 4 corresponding to the address is installed.

In addition, the notification unit 244 corresponds to the sensor 4 that has detected a fire due to the fact that the one or more detectors 4 transmit the third response signal at the same sixth timing and the third response signal interferes. If the address cannot be specified, the fire receiver 1 may be notified that at least one of the one or more detectors 4 connected to itself has detected a fire. As a result, the fire receiver 1 informs the fire prevention manager that a fire has occurred at the position where any one or more of the detectors 4 connected to the repeater 2 that has received the third response signal is installed. You can be notified.

[Effects of this embodiment]
As described above, in the fire detection system S according to the present embodiment, each of the plurality of relays 2 is assigned the first timing that arrives at a different time as a signal transmission timing. In addition, the second timing that comes after the first timing is assigned as the signal reception timing. Each of the plurality of repeaters 2 transmits a monitoring command requesting the transmission of the first response signal to the sensor 4 connected to the repeater 2 at one first timing corresponding to itself. Upon receiving the monitoring command from the repeater 2, the sensor 4 transmits the first response signal to the repeater 2 at the second timing before the first timing corresponding to the repeater 2 newly arrives. By doing so, the fire detection system S can quickly notify the fire prevention manager of the occurrence of an abnormality while suppressing interference.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist thereof. is there. For example, the specific embodiment of the distribution/integration of the device is not limited to the above-described embodiment, and all or a part thereof may be functionally or physically distributed/integrated in arbitrary units to be configured. You can Further, a new embodiment that occurs due to an arbitrary combination of a plurality of embodiments is also included in the embodiment of the present invention. The effect of the new embodiment produced by the combination has the effect of the original embodiment.

1 Fire Receiver 2 Repeater 21 First Communication Section 22 Second Communication Section 23 Storage Section 24 Control Section 241 Synchronization Section 242 State Change Section 243 Request Section 244 Notification Section 3 Relay Panel 4 Sensor 41 Communication Section 42 Sensing Section 43 Storage unit 44 Control unit 441 Warning unit 442 Response unit S Fire detection system

Claims (5)

A fire detection system comprising a plurality of repeaters connected to a fire receiver for notifying a fire prevention manager of the occurrence of a fire, and one or more detectors connected to the repeater for detecting a fire,
To each of the plurality of relays, a first timing that arrives at a different time in each of the plurality of relays is assigned as a signal transmission timing, and the plurality of relays is used as a signal reception timing. The second timing that comes at a different time in each of the above and comes after the first timing is assigned,
Each of the plurality of repeaters,
At one of the first timings, is there an abnormality in the one or more sensors connected to the repeater, the disconnection of the signal line to which the sensor is connected or the disconnection of the sensor. A request unit for transmitting a monitoring signal requesting to transmit a first response signal used to determine whether or not
Notification for determining whether or not the abnormality has occurred and notifying the fire receiver of the determination result based on the reception status of the first response signal from the one or more sensors in response to the transmission of the monitoring signal Department,
Have
The sensor is
A reception unit that, when receiving the monitoring signal from the repeater, transmits the first response signal to the repeater at the second timing before the first arrival of the first timing corresponding to the repeater.
Fire detection system. To each of the plurality of relays, a plurality of third timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, the plurality of third timings are assigned. Each of the repeaters is assigned the fourth timing that arrives at the same time and arrives after the third timing,
The request unit transmits a test control signal to the one or more sensors connected to the repeater at one of the third timings,
When the response unit receives the test control signal from the repeater, the response unit outputs the second response signal corresponding to the test control signal at the fourth timing before the third timing newly arrives. Send it to the repeater,
The notifying unit determines whether or not the sensor is operating normally based on the reception status of the second response signal from the one or more sensors in response to the transmission of the monitoring signal, and outputs the determination result. Notify the fire receiver,
The fire detection system according to claim 1. To each of the plurality of relays, a plurality of fifth timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, Each of the repeaters is assigned a sixth timing that arrives at the same time and arrives after the fifth timing,
The request unit may transmit a third response signal to the one or more detectors connected to the repeater at one of the fifth timings when the detector detects a fire. Send the acquisition request signal to request,
When the response unit receives the acquisition request signal from the relay when detecting a fire, the response unit outputs the third response signal at the sixth timing before the arrival of the fifth timing. Sent to
The notification unit specifies a sensor that has detected a fire based on the reception status of the third response signal from the one or more sensors in response to the transmission of the acquisition request signal, and information corresponding to the position of the sensor. To the fire receiver,
The fire detection system according to claim 1 or 2. The notification unit is connected to the repeater when the detector that has detected a fire cannot be specified due to the interference of the third response signals transmitted at the same sixth timing in the one or more detectors. Notifying the fire receiver that a fire has been detected in at least one of the one or more detectors
The fire detection system according to claim 3. To each of the plurality of relays, a plurality of fifth timings that arrive at the same time in each of the plurality of relays are assigned as signal transmission timings, and as the signal reception timings, The sixth timing, which arrives at the same time and arrives later than the fifth timing, is assigned to each of the repeaters,
The request unit may transmit a third response signal to the one or more detectors connected to the repeater at one of the fifth timings when the detector detects a fire. Send the acquisition request signal to request,
When the response unit receives the acquisition request signal from the repeater when a fire is detected, the response unit transmits the third response signal to the repeater at the sixth timing corresponding to the address of the detector. ,
The notification unit specifies a sensor that has detected a fire based on the reception status of the third response signal from the one or more sensors in response to the transmission of the acquisition request signal, and information corresponding to the position of the sensor. To the fire receiver,
The fire detection system according to claim 1 or 2.

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