JP2020123278A - Fire detection system and repeater - Google Patents

Abstract

To provide a fire detection system and a repeater capable of shortening a time from an activation of the repeater until a detector can be normally tested.SOLUTION: A repeater 2 is comprised of: a connection confirmation processing unit 273 that transmits a connection confirmation signal to a sensor line, which is used to confirm that a sensor 4 is connected to a sensor line in a state in which it can communicate with the repeater 2 in a pre-allocated connection confirmation period; an instruction processing unit 272 for receiving a test instruction from a fire receiver 1; and a test processing unit 274 for transmitting a test confirmation signal to the sensor 4 connected to the repeater 2 in response to the instruction processing unit 272 receiving the test instruction. When the connection confirmation processing unit 273 receives the test instruction before transmitting a connection confirmation signal, the connection confirmation processing unit transmits the connection confirmation signal to the sensor line connected to the repeater 2 in an alternative period before the connection confirmation period.SELECTED DRAWING: Figure 4

Description

The present invention relates to a fire detection system and a repeater.

BACKGROUND ART Conventionally, in a fire detection system including a fire receiver, a configuration is known in which a plurality of fire detectors can be connected to a plurality of signal lines (see, for example, Patent Document 1). A plurality of repeaters are connected to the fire receiver in the fire detection system described in Patent Document 1. A plurality of daisy chain fire detectors are connected to each of the plurality of repeaters.

Japanese Patent No. 4683474

In the fire detection system, the relay sends a test signal to the detector based on a test instruction from the fire receiver in order to confirm that the detector is operating normally. The repeater determines that the sensor is operating normally when the response signal is normally received from the sensor in response to the test signal.

However, even if the repeater sends a test signal without confirming that the sensor is able to communicate with the repeater and is connected to the signal line, whether the sensor is operating normally or not. I can't judge. Therefore, the repeater has not been activated for a sufficient amount of time, and the detector cannot confirm that it is connected to the signal line in a state where it can communicate with the repeater. When receiving the test instruction, there is a problem that the sensor cannot be tested normally.

Therefore, the present invention has been made in view of these points, and an object of the present invention is to shorten the time from when the repeater is activated until when the test of the sensor can be normally performed. ..

The fire detection system according to the first aspect of the present invention is connected to a plurality of repeaters connected to a fire receiver that notifies a guard or a facility manager of the occurrence of a fire, and is connected to the repeaters via signal lines. And a detector for detecting a fire, and a fire detection system. Each of the plurality of repeaters is used for confirming that the sensor is connected to the signal line in a communication confirmation period pre-assigned to the repeater so that the sensor can communicate with the repeater. Connection confirmation processing unit for transmitting a connection confirmation signal to the signal line, an instruction processing unit for receiving a test instruction from the fire receiver, and the relay in response to the instruction processing unit receiving the test instruction. A test processing unit for transmitting a test confirmation signal requesting transmission of a test result to the sensor connected to the detector. The connection confirmation processing unit, in the case where the instruction processing unit receives the test instruction before the connection confirmation processing unit transmits the connection confirmation signal, to the signal line connected to the repeater, The connection confirmation signal is transmitted in an alternative period before the connection confirmation period. The sensor includes a response signal transmitting unit that transmits a response signal to the relay that has transmitted the connection confirmation signal when receiving the connection confirmation signal from the relay.

The connection confirmation period is assigned to each of the plurality of repeaters in different periods, and the connection confirmation processing unit is configured such that the instruction processing unit is configured to transmit the connection confirmation signal before the connection confirmation processing unit transmits the connection confirmation signal. When the test instruction is received, the connection confirmation signal may be transmitted in the alternative period different from the connection confirmation period assigned to another repeater.

The connection confirmation processing unit may transmit the connection confirmation signal using the period in which the test processing unit can transmit the test confirmation signal as the alternative period.

The connection confirmation processing unit may transmit the connection confirmation signal using a period between the plurality of connection confirmation periods assigned to the other plurality of relays as the alternative period.

The repeater of the second aspect of the present invention is a repeater that is connected to a fire receiver that notifies a guard or a facility manager of the occurrence of a fire, and is connected to a detector via a signal line in advance. Sending a connection confirmation signal to the signal line, which is used to confirm that the sensor is connected to the signal line in a state in which the sensor can communicate with the repeater during a connection confirmation period assigned to the repeater. A connection confirmation processing unit, an instruction processing unit that receives a test instruction from the fire receiver, and a detector that is connected to the repeater in response to the instruction processing unit receiving the test instruction. A test processing unit for transmitting a test confirmation signal requesting transmission of a test result, wherein the connection confirmation processing unit performs the instruction processing before the connection confirmation processing unit transmits the connection confirmation signal. When the unit receives the test instruction, the connection confirmation signal is transmitted to the signal line connected to the repeater in an alternative period before the connection confirmation period.

According to the present invention, there is an effect that it is possible to shorten the time from when the repeater is activated until the test of the sensor can be normally performed.

It is a figure which shows the structure of a fire detection system. It is a figure for demonstrating the timing which a relay transmits various signals to a sensor. It is a figure for explaining operation when a repeater receives a test instruction from a fire receiver before transmitting a connection confirmation signal. It is a figure which shows the structure of a repeater. It is a figure for demonstrating the timing signal which a timing generation part produces|generates. It is a figure which shows the structure of a sensor. It is an operation|movement flowchart of a repeater.

[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 relays 2, a relay board 3 that houses the plurality of relays 2, a plurality of detectors 4, and a plurality of terminators 5.

The transmission line L1 is a signal line that connects the fire receiver 1 and the plurality of repeaters 2. The sensor line L2 is a signal line through which a signal is transmitted between the repeater 2 and the sensor 4. The repeater 2, the sensor 4 and the terminator 5 are connected to the sensor line L2. The terminator 5 has a terminating resistor or a terminating capacitor used to detect a break in the sensor line L2. Since the terminator 5 is connected to the sensor line L2, the relay 2 can detect the disconnection of the sensor line L2 regardless of whether the sensor 4 is connected.

The fire receiver 1 is connected to a plurality of repeaters 2 via a transmission line L1. The fire receiver 1 sequentially polls a plurality of repeaters 2 at a cycle of, for example, 3 seconds to collect information from the repeaters 2. When the fire receiver 1 specifies that at least one of the one or more detectors 4 has detected a fire via the relay device 2, the fire receiver 1 notifies the guard or the facility manager of the occurrence of the fire. The guard or facility manager includes any person who can recognize the notification of the fire receiver 1.

Each of the plurality of repeaters 2 is connected to the fire receiver 1 via the transmission line L1. Further, each of the plurality of repeaters 2 is connected to one or more sensors 4 via a sensor line L2. The relay device 2 transmits information to be notified to the fire receiver 1 in response to the polling from the fire receiver 1. The repeater 2 normally transmits, for example, data having a 16-bit width, and when transmitting information including the address of the sensor 4, the relay 2 transmits data having a larger bit width (for example, 64-bit width) than usual. ..

The detector 4 is, for example, an on/off type fire detector, and an address for identifying the detector 4 is assigned in advance. When detecting the fire, the sensor 4 notifies the relay device 2 that the fire is detected by changing the potential of the sensor line L2. After that, when the sensor 4 receives the fire confirmation signal for confirming the occurrence of the fire from the relay device 2, the sensor 4 transmits a fire confirmation response signal indicating that the fire is detected during the period assigned to the address of the sensor 4. Transmit to the sensor 4.

FIG. 2 is a diagram for explaining the timing at which the repeater 2 transmits various signals to the sensor 4. The horizontal direction in FIG. 2 corresponds to the time.

As shown in FIG. 2, the period during which each of the plurality of repeaters 2 transmits and receives at least a part of the signals is determined in association with the address of the repeater 2. In the example shown in FIG. 2, S1 is a period corresponding to the relay device 2-1, S2 is a period corresponding to the relay device 2-2, and Sn (n is a natural number) corresponds to the relay device 2-n. It is a period to do. The repeater 2 uses an internal timer to identify the elapsed time from the reference timing received from the fire receiver 1 and, based on the identified elapsed time, determines whether the period corresponding to its own address has arrived. To judge. When the repeater 2 determines that the period corresponding to its own address has arrived, the repeater 2 transmits a connection confirmation signal for confirming the address of the sensor 4 connected to the sensor line L2 to which the repeater 2 is connected. To do.

The period allocated to each of the repeaters 2 includes three periods, a connection confirmation period (C), a test confirmation period (T), and a fire confirmation period (F). The connection confirmation period is a period for confirming whether the sensor 4 is connected to the sensor line L2. The test confirmation period is a period for confirming the result of testing whether the sensor 4 is operating normally. The fire confirmation period is a period for confirming which sensor 4 has detected a fire when any of the detectors 4 has detected a fire.

In the connection confirmation period, the first period (for example, C11 in FIG. 2) in which the relay 2 to which the period is assigned can transmit the connection confirmation signal, and the connection confirmation response signal which is a response to the connection confirmation signal are detected by the sensor. 4 includes a second period (for example, C12 in FIG. 2) in which 4 can be transmitted. The second period is divided into a plurality of sub-periods associated with the addresses of the sensors 4 corresponding to the number of the sensors 4 to which the relay 2 can be connected. Each of the sensors 4 that has received the connection confirmation signal transmits a connection confirmation response signal to the connection confirmation signal in the sub period corresponding to its own address. The connection confirmation response signal is data having a predetermined logical value, and is “0”, for example.

The repeater 2 stores the address of the sensor 4 that has transmitted the connection confirmation response signal. In addition, the relay device 2 may include the newly connected sensor 4 or the sensor 4 that has changed to the unconnected state (that is, the dropped sensor 4 in response to polling from the fire receiver 1). The connection confirmation report including the address of 1) is transmitted to the fire receiver 1.

During the fire confirmation period, the repeater 2 can transmit a fire confirmation signal (for example, F11 in FIG. 2), and the detector 4 can transmit a fire confirmation response signal that is a response to the fire confirmation signal. Six periods (for example, F12 in FIG. 2) are included. In the fifth period, when the voltage of the sensor line becomes a voltage indicating that one of the sensors 4 connected to the sensor line has detected a fire, the sensor 4 that has detected the fire is turned off. This is a period for the repeater 2 to transmit a fire confirmation signal for specifying.

Among the detectors 4 that have received the fire confirmation signal, the detector 4 that is detecting the fire transmits the fire confirmation response signal in the sub period corresponding to its own address in the sixth period immediately after receiving the fire confirmation signal. To do. The detector 4 stores, for example, a flag indicating that a fire has been detected in advance, and when the flag indicates that a fire has been detected when the fire confirmation signal is received, the detector 4 sends a fire confirmation response signal. Send. The repeater 2 transmits a fire confirmation report including the address of the detector 4 that has detected a fire to the fire receiver 1 in response to polling from the fire receiver 1, for example.

In the test confirmation period, the repeater 2 can transmit the test confirmation signal in the third period (for example, T11 in FIG. 2), and the sensor 4 can transmit the test confirmation response signal which is a response to the test confirmation signal. 4 periods (for example, T12 in FIG. 2) are included. During the test confirmation period, the relay 2 transmits a test confirmation signal to the sensor 4 in response to the relay 2 receiving the instruction to execute the automatic test from the fire receiver 1, and the sensor 4 performs the test. It is a period for receiving the result. In the third period of the present embodiment, it is assumed that any relay 2 that has received the automatic test instruction from the fire receiver 1 transmits the test confirmation signal.

Each of the sensors 4 that has received the test confirmation signal transmits a test confirmation response signal in the sub period corresponding to its own address in the fourth period immediately after receiving the test confirmation signal. The sensor 4 stores, for example, the result of performing the test in advance and transmits the stored test result.

The repeater 2 identifies the address of the sensor 4 whose received test result is not good, based on the test confirmation response signal received after transmitting the test confirmation signal. Specifically, the repeater 2 has a problem with the sensor 4 that has received the connection confirmation response signal and that has transmitted the unsatisfactory test result and the sensor 4 that has not transmitted the test confirmation response signal. To determine. The repeater 2 identifies the address of the sensor 4 determined to have a problem, and transmits a test result report including the identified address to the fire receiver 1. The repeater 2 transmits a test result report to the fire receiver 1 in response to the polling from the fire receiver 1, for example.

By the way, when the length of each of the first period to the sixth period is 0.5 seconds, the total time from the first period to the sixth period is 3 seconds. When there are 255 repeaters 2, it takes 3 seconds x 255 = 765 seconds (12 minutes 45 seconds) before all the repeaters 2 transmit the connection confirmation signal and confirm the connection state of the sensor 4. .. If the confirmation of the address of the sensor 4 connected to the sensor line using the connection confirmation signal is not completed at the time when the relay 2 receives the test instruction from the fire receiver 1, the relay 2 detects the detection. It cannot recognize which sensor 4 is connected to the instrument line L2. Therefore, the repeater 2 cannot determine whether or not the sensor 4 is normal even if the test confirmation signal is transmitted. Therefore, when the repeater 2 receives the test instruction from the fire receiver 1 before transmitting the connection confirmation signal, the relay 2 transmits the connection confirmation signal in a period other than the first period assigned to itself.

FIG. 3 is a diagram for explaining the operation when the repeater 2 receives the test instruction from the fire receiver 1 before transmitting the connection confirmation signal. In FIG. 3, the repeater 2-5 is, for example, the third period included in the test confirmation period (for example, T2 in FIG. 3) that arrives before the connection confirmation period (for example, C5 in FIG. 3) assigned to itself. At, the connection confirmation signal is transmitted. Then, the repeater 2-5 performs the test in the third period included in the test confirmation period (for example, T3 in FIG. 3) that arrives after receiving the connection confirmation response signal in the fourth period immediately after transmitting the connection confirmation signal. Sending confirmation signal.

By operating the repeater 2 in this way, even if the test instruction is received from the fire receiver 1 before the sensor 4 connected to the sensor line L2 can be confirmed, A test confirmation signal can be sent.
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]
FIG. 4 is a diagram showing a 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 fire detection power supply 23, a transmission power supply 24, a mode switching unit 25, a storage unit 26, and a control unit 27. The control unit 27 includes a timing generation unit 271, an instruction processing unit 272, a connection confirmation processing unit 273, a test processing unit 274, and a fire confirmation processing unit 275.

The first communication unit 21 is a communication interface for communicating with the fire receiver 1 via the transmission line L1.
The second communication unit 22 is a circuit for applying a predetermined voltage to the sensor line L2 and transmitting various signals to the sensor 4 via the sensor line L2.

The fire detection power supply 23 is a power supply that generates a voltage (for example, 24 V) used to notify the relay device 2 that the detector 4 has detected a fire. The transmission power supply 24 is a power supply that generates a voltage (for example, 12 V) used by the repeater 2 to transmit various signals to the sensor 4. The fire detection power supply 23 and the transmission power supply 24 are connected to the mode switching unit 25.

The mode switching unit 25 applies the voltage generated by the fire detection power supply 23 or the voltage generated by the transmission power supply 24 to the sensor line L2 via the second communication unit 22. For example, when the detector 4 detects a fire and the voltage of the sensor line L2 drops below a threshold value (for example, 6 V), the mode switching unit 25 supplies the voltage generated by the fire detection power supply 23 to the sensor line L2. The applied state is switched to the state in which the voltage generated by the transmission power supply 24 is applied to the second communication unit 22.

The storage unit 26 includes a storage medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), and a hard disk. The storage unit 26 stores the program executed by the control unit 27. The storage unit 26 also stores the state of the sensor 4 in association with the address of one or more sensors 4 connected via the sensor line L2. The storage unit 26 stores, for example, a connection state of the sensor 4, a test result of the sensor 4, and a state of whether or not the sensor 4 has detected a fire.

The control unit 27 has, for example, a CPU (Central Processing Unit). The control unit 27 functions as the timing generation unit 271, the instruction processing unit 272, the connection confirmation processing unit 273, the test processing unit 274, and the fire confirmation processing unit 275 by executing the program stored in the storage unit 26.

The timing generation unit 271 generates a timing signal indicating the timing of transmitting the connection confirmation signal, the test confirmation signal, and the fire confirmation signal. The timing generation unit 271 uses, for example, a first period for transmitting a connection confirmation signal, a second period for receiving a connection confirmation response signal, and a test confirmation based on the elapsed time from the starting point of the reference signal received from the fire receiver 1. A timing signal indicating a third period for transmitting a signal, a fourth period for receiving a test confirmation response signal, a fifth period for transmitting a fire confirmation signal, and a sixth period for receiving a fire confirmation response signal is generated.

FIG. 5 is a diagram for explaining the timing signal generated by the timing generation unit 271. The hatched area in FIG. 5 indicates the first period and the second period assigned to each of the repeater 2-1, the repeater 2-2, and the repeater 2-3. The white area in FIG. 5 indicates a third period during which any relay device 2 that has received a test instruction from the fire receiver 1 can transmit a test confirmation signal, and a sensor 4 that has received the test confirmation signal causes a test confirmation response signal. Shows a fourth period in which the can be transmitted. The area of the halftone dot in FIG. 5 is the fifth period in which any relay 2 in which any one of the detectors 4 connected via the detector line L2 has detected a fire can transmit a fire confirmation signal, and the fire confirmation. The sixth period during which the sensor 4 that has received the signal can transmit the fire confirmation response signal is shown.

The timing generator 271 includes a first timing signal indicating the first periods S1, S7, and S13, a second timing signal indicating the second periods S2, S8, and S14, and a third timing S3, S9, and S15 in FIG. 3 timing signals, a fourth timing signal indicating the fourth periods S4, S10, S16, a fifth timing signal indicating the fifth periods S5, S11, S17, and a sixth timing signal indicating the sixth periods S6, S12, S18. To do.

The timing generation unit 271 performs a connection confirmation process on the first timing signal and the second timing signal indicating the first period and the second period corresponding to the address of the repeater 2, among the generated first timing signal and second timing signal. Input to the part 273. For example, the timing generation unit 271 of the first communication unit 21 inputs the generated first timing signal and second timing signal to the connection confirmation processing unit 273. The timing generation unit 271 inputs, for example, all the generated third timing signals and fourth timing signals to the test processing unit 274. The timing generation unit 271 inputs, for example, all the generated fifth timing signals and sixth timing signals to the fire confirmation processing unit 275. Unlike the first period corresponding to the first timing signal and the second period corresponding to the second timing signal, a plurality of relays are provided from the third period corresponding to the third timing signal to the sixth period corresponding to the sixth timing signal. The period shared by the devices 2 is shown by a broken line in FIG.

The timing generating unit 271 receives one of the third timing signal to the sixth timing signal on condition that the instruction is received from the instruction processing unit 272, the connection confirmation processing unit 273, the test processing unit 274, and the fire confirmation processing unit 275. May be entered in any of For example, if the instruction processing unit 272 receives a test instruction before the connection confirmation processing unit 273 transmits the connection confirmation signal, the instruction processing unit 272 may perform timing to input the third timing signal to the connection confirmation processing unit 273. The generation unit 271 is instructed. In this case, the timing generation unit 271 inputs the third timing signal to the connection confirmation processing unit 273. As a result, the connection confirmation processing unit 273 can transmit the connection confirmation signal before the first period corresponding to its own address.

Returning to FIG. 4, when the instruction processing unit 272 identifies that the instruction to perform the automatic test is received from the fire receiver 1, the instruction processing unit 272 instructs the test processing unit 274 to transmit the test confirmation signal. When the instruction processing unit 272 acquires the test result of the sensor 4 via the test processing unit 274, the instruction processing unit 272 transmits the acquired test result to the fire receiver 1.

The instruction processing unit 272 receives the test instruction from the fire receiver. The instruction processing unit 272, for example, transmits the test result to the fire receiver 1 in response to the polling from the fire receiver 1.

The connection confirmation processing unit 273 is used to confirm that the sensor 4 is connected to the sensor line L2 in a communicable state with the relay 2 during the connection confirmation period assigned to the relay 2 in advance. A connection confirmation signal is transmitted to the sensor line L2. The connection confirmation processing unit 273 transmits a connection confirmation signal to the sensor line L2 during the first period indicated by the first timing signal input from the timing generation unit 271. When the connection confirmation processing unit 273 receives the connection confirmation response signal in the second period after transmitting the connection confirmation signal, the connection confirmation processing unit 273 is based on the elapsed time from the rising timing of the second timing signal input from the timing generation unit 271. Then, the address of the sensor 4 that has transmitted the connection confirmation response signal is specified. The connection confirmation processing unit 273 stores the address of the sensor 4 that has transmitted the connection confirmation response signal in the storage unit 26.

When the instruction processing unit 272 receives the test instruction before the connection confirmation processing unit 273 transmits the connection confirmation signal, the connection confirmation processing unit 273 itself attaches itself to the sensor line L2 connected to the repeater 2. The connection confirmation signal is transmitted in the alternative period before the allocated connection confirmation period. Specifically, the connection confirmation processing unit 273 transmits the connection confirmation signal in an alternative period different from the connection confirmation period assigned to the other repeater 2. The connection confirmation processing unit 273 transmits the connection confirmation signal with the test confirmation period in which the test processing unit 274 can transmit the test confirmation signal as an alternative period. The connection confirmation processing unit 273 may transmit the connection confirmation signal with a period between the plurality of connection confirmation periods assigned to the other plurality of repeaters 2 as an alternative period, for example, during the fire confirmation period. Or a test confirmation signal may be transmitted.

The test processing unit 274 transmits a test confirmation signal requesting the transmission of the test result to the sensor 4 connected to the relay 2 in response to the instruction processing unit 272 receiving the test instruction. The test processing unit 274 transmits a test confirmation signal to the sensor line L2 in any third period indicated by the third timing signal input from the timing generation unit 271. When the test processing unit 274 receives the test confirmation response signal in the fourth period after transmitting the test confirmation signal, the test processing unit 274 is based on the elapsed time from the rising timing of the fourth timing signal input from the timing generation unit 271. , The address of the sensor 4 which has transmitted the test confirmation response signal is specified. The test processing unit 274 notifies the instruction processing unit 272 of the address of the sensor 4 and the test result in association with each other. The test processing unit 274 may store the test result indicated by the test confirmation response signal in the storage unit 26 in association with the address of the sensor 4 that has transmitted the test confirmation response signal.

When the fire confirmation processing unit 275 detects that one of the detectors 4 connected via the sensor line L2 has detected a fire based on the change in the voltage of the sensor line L2, the fire confirmation processing unit 275 outputs the timing generation unit 271. A fire confirmation signal is transmitted to the sensor line L2 during any of the fifth periods indicated by the input fifth timing signal. When the fire confirmation processing unit 275 receives the fire confirmation response signal in the sixth period after transmitting the fire confirmation signal, the fire confirmation processing unit 275 is based on the elapsed time from the rising timing of the sixth timing signal input from the timing generation unit 271. Then, the address of the sensor 4 that has transmitted the fire confirmation response signal is specified. The fire confirmation processing unit 275 notifies the instruction processing unit 272 of the address of the sensor 4 and the test result in association with each other. The fire confirmation processing unit 275 may store the fire occurrence status indicated by the fire confirmation response signal in the storage unit 26 in association with the address of the sensor 4 that has transmitted the fire confirmation response signal.

[Structure of sensor 4]
Next, the configuration of the sensor 4 will be described. FIG. 6 is a diagram showing the configuration of the sensor 4 according to the present embodiment. The sensor 4 includes a communication unit 41, a fire detection unit 42, a storage unit 43, and a control unit 44. The control unit 44 has a signal transmission/reception unit 441 and a timing generation unit 442.

The communication unit 41 is a communication interface that communicates with the repeater 2 via the sensor line L2. The communication unit 41 lowers the voltage of the sensor line L2 when the fire detection unit 42 detects a fire. Further, when transmitting the response signal to the repeater 2, the communication unit 41 transmits the response signal during the period assigned to the sensor 4.

The fire detection unit 42 has a device such as a heat sensor or a smoke sensor that detects the occurrence of a fire. When detecting the occurrence of a fire, the fire detection unit 42 notifies the communication unit 41 of a signal indicating that the occurrence of a fire has been detected.

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 (for example, a computer). The storage unit 43 also stores setting information that defines a period during which the sensor 4 communicates with the repeater 2.

The control unit 44 has, for example, a control circuit or a CPU, and functions as the signal transmission/reception unit 441 and the timing generation unit 442. Upon receiving the connection confirmation signal from the relay device 2, the signal transmission/reception unit 441 functions as a response signal transmission unit that transmits a response signal to the relay device 2 that has transmitted the connection confirmation signal. The signal transmitting/receiving unit 441 receives the connection confirmation signal, the test confirmation signal, and the fire confirmation signal transmitted from the repeater 2, and transmits a response signal to these signals.
The timing generation unit 442 determines, based on the timing at which the connection confirmation signal, the test confirmation signal, or the fire confirmation signal is received from the repeater 2 and the address stored in the storage unit 43, the period for transmitting the response signal to these signals. decide.

[Operation Flowchart of Repeater 2]
FIG. 7 is an operation flowchart of the repeater 2. The operation flowchart shown in FIG. 7 starts from the time when the repeater 2 receives the reference signal from the fire receiver 1. The timing generation unit 271 generates various timing signals based on the received reference signal.

The control unit 27 monitors whether or not it is time to perform the process of transmitting the connection confirmation signal (S11). The control unit 27 determines that the timing is the timing at which the connection confirmation processing unit 273 performs the connection confirmation processing, for example, when the timing generation unit 271 generates the first timing signal (YES in S11). In this case, the connection confirmation processing unit 273 transmits the connection confirmation signal in the first period within the connection confirmation period assigned to the repeater 2 of its own in order to transmit the connection confirmation signal indicated by the first timing signal ( S12).

After that, the connection confirmation processing unit 273 waits until the connection confirmation response signal is received (S13), and when the connection confirmation response signal is received, the address of the sensor 4 that has transmitted the connection confirmation response signal is sent to the sensor line L2. The address of the connected sensor 4 is stored in the storage unit 26 (S14). The connection confirmation processing unit 273 sets the address of the sensor 4 that does not receive the connection confirmation response signal even after the lapse of a predetermined timeout time after transmitting the connection confirmation signal, to the sensor 4 not connected to the sensor line L2. The address may be stored in the storage unit 26.

Subsequently, when the instruction processing unit 272 receives the test instruction from the fire receiver 1 (S15), the test processing unit 274 transmits a test confirmation signal (S16). The test processing unit 274 waits until a test confirmation response signal for the test confirmation signal is received (S17). Upon receiving the test confirmation response signal, the test processing unit 274 transmits the test result indicated by the test confirmation response signal to the fire receiver 1 via the instruction processing unit 272 (S18).

When the instruction processing unit 272 receives a test instruction from the fire receiver 1 (S19) before the control unit 27 determines in S11 that the timing of the process of transmitting the connection confirmation signal has arrived (NO in S11). If YES, the connection confirmation processing unit 273 is instructed to transmit the connection confirmation signal in an alternative period different from the connection confirmation period assigned to the other repeater 2 (S20). Based on the instruction, the connection confirmation processing unit 273 transmits the connection confirmation signal in the third period allocated for transmitting the test confirmation signal or the fifth period allocated for transmitting the fire confirmation signal. ..

After that, the connection confirmation processing unit 273 waits until the connection confirmation response signal is received (S21), and when the connection confirmation response signal is received, the address of the sensor 4 that has transmitted the connection confirmation response signal is sent to the sensor line L2. The address of the connected sensor 4 is stored in the storage unit 26 (S22). After that, the control unit 27 executes the processing from S16.

[Effects of this embodiment]
As described above, the connection confirmation processing unit 273 included in the relay device 2 according to the present embodiment allows the instruction processing unit 272 to issue a test instruction from the fire receiver 1 before the connection confirmation processing unit 273 transmits the connection confirmation signal. When received, the connection confirmation signal is transmitted in an alternative period (for example, a test confirmation period or a fire confirmation period) before the connection confirmation period. When the connection confirmation processing unit 273 operates in this way, the repeater 2 receives the address of the sensor 4 when it takes a long time to arrive at the period allocated to confirm the address of the sensor 4. Even if the test instruction is received from the fire receiver 1 before the relay device 2 confirms, the address of the connected detector 4 is confirmed, and then the fire detector 1 quickly detects the instruction. It is possible to obtain the test result of the container 4.

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 device distribution/integration is not limited to the above embodiment, and all or part of the device may be functionally or physically distributed/integrated in arbitrary units. You can Further, a new embodiment that occurs due to an arbitrary combination of a plurality of embodiments is also included in the embodiments of the present invention. The effect of the new embodiment produced by the combination also has the effect of the original embodiment.

1 Fire Receiver 2 Repeater 3 Relay Board 4 Sensor 5 Terminator 21 First Communication Section 22 Second Communication Section 23 Fire Sensing Power Supply 24 Transmission Power Supply 25 Mode Switching Section 26 Storage Section 27 Control Section 41 Communication Section 42 Fire Detection unit 43 Storage unit 44 Control unit 271 Timing generation unit 272 Instruction processing unit 273 Connection confirmation processing unit 274 Test processing unit 275 Fire confirmation processing unit 441 Signal transmission/reception unit 442 Timing generation unit

Claims (5)

Fire detection including a plurality of repeaters connected to a fire receiver for notifying a guard or facility manager of the occurrence of a fire, and a detector for detecting a fire connected to the repeater via a signal line System,
Each of the plurality of repeaters,
A connection confirmation signal, which is used to confirm that the sensor is connected to the signal line in a state in which the sensor can communicate with the repeater, is connected to the signal line in a connection confirmation period previously assigned to the repeater. Connection confirmation processing unit to send,
An instruction processing unit that receives a test instruction from the fire receiver,
In response to the instruction processing unit receives the test instruction, to the sensor connected to the repeater, a test processing unit for transmitting a test confirmation signal requesting to transmit a test result,
Have
The connection confirmation processing unit, in the case where the instruction processing unit receives the test instruction before the connection confirmation processing unit transmits the connection confirmation signal, to the signal line connected to the repeater, Sending the connection confirmation signal in an alternative period before the connection confirmation period,
The sensor is
When receiving the connection confirmation signal from the repeater, a response signal transmission unit that transmits a response signal to the relay that has transmitted the connection confirmation signal,
Fire detection system. The connection confirmation period is assigned to each of the plurality of repeaters in different periods,
The connection confirmation processing unit is different from the connection confirmation period assigned to another repeater when the instruction processing unit receives the test instruction before the connection confirmation processing unit transmits the connection confirmation signal. Transmitting the connection confirmation signal in the alternative period,
The fire detection system according to claim 1. The connection confirmation processing unit transmits the connection confirmation signal using the period in which the test processing unit can transmit the test confirmation signal as the alternative period.
The fire detection system according to claim 2. The connection confirmation processing unit transmits the connection confirmation signal with a period between the plurality of connection confirmation periods allocated to the other plurality of relays as the alternative period.
The fire detection system according to claim 2 or 3. A relay device that is connected to a fire receiver that notifies a guard or facility manager of the occurrence of a fire, and that is connected to a detector through a signal line,
A connection confirmation signal, which is used to confirm that the sensor is connected to the signal line in a state in which the sensor can communicate with the repeater, is connected to the signal line in a connection confirmation period previously assigned to the repeater. Connection confirmation processing unit to send,
An instruction processing unit that receives a test instruction from the fire receiver,
In response to the instruction processing unit receives the test instruction, to the sensor connected to the repeater, a test processing unit for transmitting a test confirmation signal requesting to transmit a test result,
Have
The connection confirmation processing unit, in the case where the instruction processing unit receives the test instruction before the connection confirmation processing unit transmits the connection confirmation signal, to the signal line connected to the repeater, A repeater that transmits the connection confirmation signal in an alternative period before the connection confirmation period.

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