JP5705013B2 - Fire alarm system - Google Patents

Description

  The present invention relates to a fire alarm facility including a sensor, a fire receiver, and the like, and more particularly, to a fire alarm facility in which a part of various signals is converted into a radio signal.

Conventionally, as a wireless communication system suitable for an automatic meter reading system that automatically collects meter reading data such as a gas meter or a water meter, or a security system that notifies information such as a gas leak sensor or a fire sensor, the “wireless slave unit 4 is intermittently received. When the activation command is detected and the activation command is detected, the operation shifts from the intermittent reception operation state to a state where data communication is possible, and an activation response is transmitted to the wireless slave unit 5 (step S33).
Here, the transmission time (calling time) of the activation command to the wireless slave device 4 by the wireless slave device 5 and the intermittent reception interval of the wireless slave device 4 are the intervals (3a) of the intermittent reception P8, as shown in FIGS. ) Is longer than the transmission time (3a + α) of the activation command P7. Accordingly, the wireless slave device 4 is activated by the first activation command.
The wireless slave device 5 that has received the activation response transmits an alarm from the wireless slave device 5 to the wireless slave device 4 (step S34). The wireless slave device 4 that has received this warning transmits an acknowledgment response (ACK) to the wireless slave device 5 (procedure S35) and transmits an activation command to the wireless slave device 3 (procedure S36). The wireless handset 5 that has received the acknowledgment (ACK) returns to the intermittent reception operation state. (For example, see Patent Document 1).

JP 2008-312062 A (page 7, FIG. 5)

In the technique described in Patent Document 1, when an activation command is received from a lower-level device, the higher-level device shifts from an intermittent reception operation state to a state where data communication is possible. When the activation response is received from the higher-level device that has shifted to a state where data communication is possible, the lower-level device transmits an alarm. For this reason, it took time until the alarm signal from the lower-level device (for example, “slave 5” in Patent Document 1) is received by the highest-level device (“Center 1” in Patent Document 1).
Therefore, there has been a demand for a technique that allows a higher-level device to receive a signal notifying an abnormality from a lower-level device earlier.

  The present invention has been made to solve the above-described problems, and provides a fire alarm facility in which a wireless repeater can receive a fire signal from a sensor earlier.

A fire alarm facility according to the present invention includes a sensor that detects an environmental change based on a fire phenomenon and transmits / receives a wireless signal, a fire receiver that monitors and controls the sensor, and the sensor and the fire receiver. One or a plurality of repeaters that interpose between and configure a plurality of communication layers to relay radio signals, and based on a status request signal transmitted from an upper device in the communication layer, a lower device in the communication layer Is a fire alarm facility that performs a state collection process for transmitting a state information signal including its own apparatus state information, and in the state collection process, the detector detects a fire and sends a fire signal to a host device. send to the repeater, the repeater transmits the status request signal by transmitting pattern and transmission suspension period and the transmission period is repeated a predetermined number of times alternately from the detector Upon receiving the received fire signal or the fire signal relayed by the repeater, which is a lower device, the transmission of the status request signal to the lower device is stopped and the fire signal is transmitted to the upper device. It is characterized by this.

  According to the fire alarm facility according to the present invention, when the repeater receives the fire signal from the sensor in the state collection process, the repeater stops transmitting the state request signal and transmits the fire signal to the host device. For this reason, even if a fire is detected during the state collection process, the host device can receive the fire signal from the detector earlier.

It is a system configuration figure of the fire alarm equipment concerning an embodiment. It is a block diagram which shows the main structures of the sensor which concerns on embodiment. It is a block diagram which shows the main structures of the repeater repeater which concerns on embodiment. It is a block diagram which shows the main structures of the radio | wireless repeater which concerns on embodiment. It is a figure explaining the communication message | telegram transmitted with respect to a wireless repeater or a repeater repeater in the state collection process and fire notification process of embodiment. It is a figure explaining the communication message | telegram transmitted to the sensor and the communication message | telegram which a sensor transmits in the state collection process of embodiment. It is a figure explaining the communication message | telegram which a repeater repeater transmits in the state collection process of embodiment. It is a figure explaining the state collection process which concerns on embodiment. It is a figure explaining the fire notification process which concerns on embodiment. It is a figure explaining the operation example when a sensor detects a fire during the state collection process which concerns on embodiment. It is a figure explaining the other operation example when a sensor detects a fire during the state collection process which concerns on embodiment.

(Configuration of fire alarm equipment)
First, the fire alarm facility according to the present embodiment will be described.
FIG. 1 is a system configuration diagram of a fire alarm facility according to an embodiment. The fire alarm facility shown in FIG. 1 is a system that is installed in a building to be monitored and notifies when an occurrence of a fire is detected.

As shown in FIG. 1, the fire alarm system 100 according to the embodiment includes a fire receiver A, a wireless repeater B1 connected to the fire receiver A by a transmission line CL1, and a transmission line to the fire receiver A. And a wireless repeater B2 connected by CL2. Hereinafter, the wireless repeaters B1 and B2 may be collectively referred to as a wireless repeater B. The wireless repeater B is wired to the fire receiver A and operates by receiving power supply.
Sensors D11, D12, D21, D22, D31, D32, D41, D42, and D43 (hereinafter may be collectively referred to as sensor D) are installed in a room or the like of a building to be monitored.
Also, a repeater repeater C1 that relays wireless signals interposed between the wireless repeater B1 and the sensors D21 and D22, and a wireless repeater interposed between the wireless repeater B1 and the sensors D31 and D32. Repeater repeaters C2 and C3 for relaying signals. Hereinafter, the repeater repeaters C1, C2, and C3 may be collectively referred to as repeater repeaters C.
The wireless repeater B1 and the repeater repeater C (one or more) have a communication hierarchical structure, and transmit and receive radio signals from an upper layer to a lower layer or from a lower layer to an upper layer. Note that the wireless repeater B and the repeater repeater C in the present embodiment correspond to the repeater in the present invention.

Here, a set of devices that perform wireless transmission and reception between each wireless repeater B and the wireless repeater B is referred to as a group. That is, one group is formed for each wireless repeater B. In the example of FIG. 1, the repeater repeater C and the sensor D that perform wireless transmission / reception with the wireless repeater B1 and the wireless repeater B1 are referred to as a group G1. In addition, the wireless repeater B2 and the sensor D that performs wireless transmission / reception with the wireless repeater B2 are referred to as a group G2.
In each group, a plurality of communication paths with the wireless repeater B as a base point can be provided. In the example of the group G1 in FIG. 1, the sensors D11 and D12 that perform direct transmission / reception with this are the communication path F1, the repeater repeater C1, and the sensors D21 and D22 that perform transmission / reception via this are the communication path F2, and the repeater relay Sensors D31 and D32 that perform transmission and reception through C2 and C3 are communication paths F3. Further, in the example of the group G2 in FIG. 1, one communication path F4 including sensors D41, D42, and D43 that directly transmit and receive with the wireless relay B2 is provided. For example, the communication frequency between devices can be set to the same setting for each group, but is not limited to this.

(Sensor D)
The sensor D detects a physical quantity or a physical change of the detection target based on the fire phenomenon, and transmits a state signal corresponding to the detected content as a radio signal. The sensor D outputs, for example, an analog value based on the detected smoke concentration or a fire notification signal as a radio signal, or a so-called smoke sensor that outputs an analog value based on the detected ambient temperature or a fire notification signal as a radio signal. It is a sensor for detecting a fire, such as a so-called heat sensor. The sensor D can transmit and receive a radio signal to / from the wireless repeater B or the repeater repeater C.

  FIG. 2 is a block diagram showing a main configuration of the wireless sensor D according to the embodiment. The sensor D includes a control circuit 1, a battery 2, a constant voltage circuit 3, a voltage detection circuit 4, a transmission / reception circuit 5, an antenna 6, a fire detection circuit 7, an indicator lamp circuit 8, and a registration switch 9.

  The battery 2 supplies DC power to the constant voltage circuit 3. The constant voltage circuit 3 controls the voltage of the battery 2 to a predetermined voltage and supplies it to the control circuit 1, the transmission / reception circuit 5, the fire detection circuit 7, and the indicator lamp circuit 8.

  The voltage detection circuit 4 detects the voltage of the battery 2 applied to the constant voltage circuit 3 and outputs a battery voltage detection signal corresponding to the detected voltage to the control circuit 1. When the voltage detection circuit 4 detects that the remaining battery level has decreased or has exceeded the battery depletion threshold value, the voltage detection circuit 4 outputs it to the control circuit 1, thereby driving the indicator lamp circuit 8. Then, the state signal including the state information of the battery exhaustion is output from the transmission / reception circuit 5.

  The fire detection circuit 7 detects a physical quantity or a physical change of an object to be detected such as smoke or heat based on a fire phenomenon, and outputs a state signal corresponding to the detected content to the control circuit 1. The indicator lamp circuit 8 is a circuit that controls the lighting operation of indicator lamps such as light emitting diodes.

The transmission / reception circuit 5 is connected to an antenna 6 for transmitting / receiving a radio signal, and includes a transmission circuit 5a and a reception circuit 5b. The reception circuit 5b performs a reception sampling operation at a predetermined period to detect a radio signal input from the antenna 6, and performs reception processing according to the content of the radio signal if it is addressed to itself. Then, the reception circuit 5b outputs the signal subjected to the reception process to the control circuit 1. The transmission circuit 5a is controlled by the control circuit 1 to perform transmission processing of signals such as status signals.
The registration switch 9 is a switch used when registering information such as a communication path necessary for transmitting and receiving a radio signal within a group.

  The control circuit 1 has a function as a state determination unit that determines a fire state and the like based on a signal output from the fire detection circuit 7. If it is determined that there is a fire condition, the indicator lamp circuit 8 is controlled to issue an alarm with the indicator lamp. In addition to performing necessary processing based on the signal received by the transmission / reception circuit 5, the transmission / reception circuit 5 is controlled as necessary to transmit signals such as a status signal and a fire notification signal to other devices.

  The storage element 1a is a nonvolatile memory such as an EEPROM, and stores programs executed by the control circuit 1 and various data.

(Repeater repeater C)
The repeater repeater C is interposed between the wireless repeater B and the sensor D and relays wireless signals. That is, the repeater repeater C expands the reach of the radio wave when the radio repeater B and the sensor D do not reach each other. Like the repeater repeaters C2 and C3 shown in the group G1 in FIG. 1, two or more repeater repeaters C may be provided between the wireless repeater B and the sensor D for relay.

FIG. 3 is a block diagram showing a main configuration of repeater repeater C according to the embodiment. The repeater repeater C includes a control circuit 11, a battery 2, a constant voltage circuit 3, a voltage detection circuit 4, a transmission / reception circuit 5, an antenna 6, an indicator lamp circuit 8, and a registration switch 9. The repeater repeater C does not include the fire detection circuit 7 unlike the sensor D described above, and the operation content of the control circuit 11 and the information stored in the storage element 11a are partially different. Is basically the same as sensor D.
For example, the repeater repeater C may be provided with a fire detection circuit 7 as shown in the fire detector D of FIG. 2 or a sensor for detecting smoke, heat, etc., so that the repeater repeater C has a fire detection function.

(Wireless repeater B)
The wireless repeater B has a function of transmitting and receiving a wireless signal between the sensor D and the repeater repeater C and transmitting a wireless signal from the sensor D or the repeater repeater C to the fire receiver A.

FIG. 4 is a block diagram showing a main configuration of the wireless repeater B according to the embodiment.
The wireless repeater B includes a control circuit 21, a constant voltage circuit 3, a voltage detection circuit 4, a transmission / reception circuit 5, an antenna 6, an indicator lamp circuit 8, a registration switch 9, a receiver I / F circuit 22, and a power line terminal 20a. And a signal line terminal 20b. The wireless repeater B is not battery-driven like the above-described sensor D and repeater repeater C, but is connected to the DC from the fire receiver A via the power line connecting the fire receiver A and the power line terminal 20a. Powered. Further, the fire receiver A and the signal line terminal 20b are connected by a signal line (transmission line CL), and the wireless repeater B transmits a signal to the fire receiver A via the receiver I / F circuit 22. Send and receive. Although the operation contents of the control circuit 21 and the information stored in the storage element 21a are partially different, other configurations are basically the same as those of the sensor D and the repeater repeater C.

(Overview of fire alarm equipment operation)
The first major operation of the fire alarm system 100 is fire monitoring. Specifically, each sensor D monitors the presence or absence of a fire in its own monitoring area. When the sensor D detects a change in the environment such as smoke or heat due to a fire, this detection information is transmitted to the wireless relay B via a wireless signal (fire signal) via the repeater relay C or directly. . Further, detection information is transmitted from the wireless repeater B to the fire receiver A. Upon receiving the fire detection information, the fire receiver A controls a sound alarm device (not shown) to notify the fire, and operates a fire door, a smoke evacuator, a shutter (not shown) and the like to prevent the spread of fire.
The second main operation of the fire alarm system 100 is a state collection process. In the fire alarm system 100, if a battery runs out or a wireless communication failure occurs in each device constituting the fire alarm facility 100, the fire notification cannot be performed. In order to prevent such a problem from occurring, a state collection process is performed in which the state of each device (battery state, wireless communication function state, etc.) is collected at a predetermined cycle.

In the above-described fire monitoring and status collection transmission / reception processing, communication is performed using radio signals.
The wireless repeater B and the repeater repeater C are interposed between the fire receiver A and the sensor D, and function as a repeater that relays wireless communication to be performed between them.

Moreover, in each device constituting the fire alarm facility 100, information necessary for transmitting and receiving signals is stored in the storage element of each device. The information stored in the storage element includes at least a group ID, a self address, a higher device address, a lower device address, and a device number.
The group ID is an ID uniquely assigned to each group shown in FIG. This group ID is set for all devices of the wireless repeater B, the repeater repeater C, and the sensor D.
The self address is a communication address uniquely assigned to each device, and is set for all devices of the wireless repeater B, the repeater repeater C, and the sensor D.

The upper device address is an address of a device located immediately above itself in the communication hierarchy. Here, the upper level means a side closer to the fire receiver A with respect to each device. For example, in the group G1 in FIG. 1, the upper device of the repeater relay C1 is the wireless relay device B1, and the higher devices of the sensors D21 and D22 are the repeater relay C1. This higher device address is set for the repeater repeater C and the sensor D.
The lower device address is an address of a device located immediately below itself in the communication hierarchy. Here, the low order means the side far from the fire receiver A with respect to each device. For example, in the group G1 of FIG. 1, the low-order device of the repeater repeater C2 is the repeater repeater C3, and the low-order devices of the repeater repeater C3 are the sensors D31 and D32. The lower device address is set for the wireless repeater B and the repeater repeater C.

  The device number is a number uniquely assigned to each terminal in the same type of device belonging to one group. For example, in the present embodiment, the maximum number of repeater repeaters C that can be connected to one group is six, and each repeater repeater C is assigned a device number of 01 to 06. In the present embodiment, the maximum number of sensors D that can be connected to one group is 30, and each sensor D is assigned a device number of 01 to 30. In this embodiment, an example in which a self address and a device number are provided separately is shown, but a self address that is information unique to each device can also be used as a device number.

Here, an outline of a registration process for registering information such as a communication path necessary for transmitting and receiving a radio signal in a group in each device will be described.
First, the wireless repeater B and the repeater repeater C, which are host devices, have a mode called a registration mode as an operation mode for registering a communication path. Further, the repeater repeater C and the sensor D, which are lower devices, can transmit a registration request signal for requesting registration of a communication path.
In such a configuration, a registration request signal including its own address is transmitted from the lower device (repeater repeater C or sensor D) to the upper device (wireless repeater B or repeater repeater C) in the registration mode state. Then, the upper device sets the address included in the registration request signal as its lower device address, and transmits a registration signal including the self address to the lower device. The lower device (repeater repeater C or sensor D) that has received this registration signal sets the address included in the registration signal as its upper device address. By performing such processing for each device constituting the communication path, the communication path is established. The transition to the registration mode and the transmission of the registration request signal are executed by operating the registration switch 9 by the user. Further, this registration process can be performed when newly installing the fire alarm facility 100, or when adding equipment after the fire alarm facility 100 is installed.

(Outline of send / receive processing)
Next, an outline of transmission / reception processing in the fire alarm facility 100 will be described.
The main transmission / reception processes of radio signals in the fire alarm system 100 are (1) state collection process and (2) fire notification process.

(1) State collection process In the state collection process, the wireless relay B collects state information (for example, battery state) of devices (repeater repeater C, sensor D) that transmit and receive wireless signals to and from itself. It is processing. The wireless repeater B transmits a status request signal for requesting its own subordinate device to transmit the status information of the device itself, and the device that has received this status request signal further transmits its status request signal to its subordinate device. To send a status request signal. This state request signal is relayed to the end of the communication path, and the sensor D, which is the terminal device, transmits a signal including its own state information as a state information signal to the host device. The host device that has received this state information signal adds a signal including its own state information to the received signal, and transmits the signal as a state information signal to the host device. This state information signal is transmitted in sequence until reaching the wireless repeater B which is the highest-level device in the communication path. Then, the wireless repeater B determines the state of the state information signal collected from the lower device, and transmits the information included in the state information signal to the fire receiver A if necessary.

  The state collection process is performed for each wireless communication path. That is, in the example of FIG. 1, first, the wireless repeater B1 performs state collection processing between the sensors D11 and D12 (communication path F1), and when this is completed, the wireless repeater B1 becomes the repeater repeater C1. And the state collection processing is performed between the sensors D21 and D22 (communication path F2) that perform transmission and reception with this, and when this is completed, the wireless relay B1 repeaters repeaters C2 and C3 and the sensors that perform transmission and reception with the repeaters A state collection process is performed between D31 and D32 (communication path F3). The state collection processing may be performed at a predetermined cycle (for example, a 24-hour cycle), or the cycle of performing the state collection processing may be changed according to the situation such as the installation years of the fire alarm facility 100.

(2) Fire Notification Processing This is processing for transmitting a wireless signal based on the fire information detected by the sensor D to the fire receiver A via the wireless repeater B. The signal flow is in the order from the lower order device to the higher order device of the communication path: sensor D, repeater repeater C (only when intervening), wireless repeater B, and fire receiver A. For the sake of explanation in this embodiment, the wireless signal based on the fire information transmitted from the sensor D to the host device is referred to as a “fire notification signal”, and the fire information transmitted from the repeater relay C to the host device. The wireless signal based on the above is properly used as the “fire transfer signal”, both of which correspond to the “fire signal” in the present invention.

In addition, when transmitting a radio signal, it is necessary to transmit within the range of the transmission time set by the standard etc. In the present embodiment, an example will be described in which the transmission period is 3 seconds or shorter and the transmission pause time is 2 seconds or longer in accordance with the standard RCR STD-30.
In addition, the wireless repeater B, the repeater repeater C, and the sensor D basically perform intermittent reception of receiving wireless signals from other devices at predetermined intervals. In the present embodiment, the intermittent reception interval of the wireless repeater B is TB, the intermittent reception interval of the repeater repeater C is TC, and the intermittent reception interval of the sensor D is TD.

(Communication telegram)
Next, a communication message used in the fire alarm facility 100 according to the present embodiment will be described. The communication message described here is a communication message used in the above-described (1) state collection processing and (2) fire notification processing.
In the fire alarm facility 100 according to the embodiment, the communication message to be used depends on the type of transmission / reception processing ((1) status collection processing or (2) fire notification processing), the type of the transmission source device, and the type of the reception source device. It has been established. First, each communication message will be specifically described.

FIG. 5 is a diagram illustrating a communication message transmitted to the wireless repeater or the repeater repeater in the state collection process and the fire notification process according to the embodiment.
The communication slot 110 shown in FIG. 5 is from the transmission source (wireless repeater B or repeater repeater C) to the repeater repeater C, or from the transmission source (repeater repeater C or sensor D) to the wireless repeater B or A transmission slot 111 for transmitting a signal to the repeater repeater C and a continuous reception slot 112 for receiving a signal from another device.

The transmission slot 111 is composed of a plurality of (60 in this embodiment) basic frames 101 that are continuous. That is, in the transmission slot 111, the basic frame 101 is continuously transmitted a plurality of times. The basic frame 101 includes, for example, a synchronization signal, a group ID for identifying a transmission source, a transmission source address, a frame number, data, and the like.
The length of the transmission slot 111 is set to be longer than the length of the intermittent reception interval TB of the wireless repeater B and the intermittent reception interval TC of the repeater repeater C, and the wireless repeater B and the repeater repeater C Can receive any one of the basic frames 101 in the transmission slot 111.
Before starting transmission using the transmission slot 111, CS before transmission (carrier sense before transmission) is performed, and transmission is started after confirming that no other device is transmitting a radio signal.

  The continuous reception slot 112 is a transmission suspension period in which no radio signal is transmitted, and is a time period in which the reception circuit is activated to perform a radio signal reception process. The continuous reception slot 112 includes a fire transfer signal area 113, a fire notification signal area 114, and other signal areas 115. The fire transfer signal area 113 is an area for receiving a fire transfer signal transferred from another device (subordinate device), and the fire notification signal area 114 is for receiving a fire notification signal transmitted from the sensor D. The area 115 for other signals is an area for receiving a control request signal or a status request signal other than the fire transfer signal and the fire notification signal. Although details will be described later with reference to FIG. 10, other devices can transmit corresponding signals to the fire transfer signal area 113, the fire notification signal area 114, and the other signal areas 115. ing. In the present embodiment, areas are provided in the order of the fire transfer signal area 113, the fire notification signal area 114, and the other signal areas 115 in order of increasing importance of the radio signal.

  FIG. 6 is a diagram illustrating a communication message transmitted to the sensor and a communication message transmitted by the sensor in the state collection process according to the embodiment. 6A shows a communication message transmitted from the wireless repeater B or the repeater repeater C to the sensor D, and FIG. 6B shows a communication message transmitted from the sensor D. . FIG. 6B shows an example of transmission / reception operations of a plurality of detectors D having different intermittent reception timings.

  The block communication 120 shown in FIG. 6A includes a transmission slot 121, a continuous reception slot 122, a transmission slot 123, a continuous reception slot 124, a transmission slot 125, and a continuous reception slot 126. The transmission slots 121, 123, and 125 are composed of a plurality of continuous basic frames 101. That is, in the transmission slots 121, 123, and 125, the basic frame 101 is continuously transmitted a plurality of times. Before starting transmission by the transmission slot 121, CS before transmission (carrier sense before transmission) is performed, and transmission is started after confirming that no other device is transmitting a radio signal.

The continuous reception slots 122, 124, and 126 are transmission suspension periods during which no radio signal is transmitted, and the reception circuit is activated to perform radio signal reception processing.
In the block communication 120, a transmission period (transmission slot 121, 123, 125) for transmitting a radio signal and a transmission suspension period (continuous reception slot 122, 124, 126) for not transmitting a radio signal are alternately repeated.

Here, the time of each slot constituting the block communication 120 will be described. First, the radio signal transmission processing needs to be set in accordance with the standard as described above so that the transmission period is 3 seconds or less and the transmission pause time is 2 seconds or more. On the other hand, the sensor D on the receiving side performs intermittent reception every intermittent reception interval TD (7 seconds in the present embodiment), and the timing of intermittent reception of each sensor D may be different. Therefore, in order for each sensor D to receive a radio signal in intermittent reception, the timing of intermittent reception of each sensor D needs to be included in one of the transmission slots 121, 123, 125 of the signal transmission source. There is.
Therefore, in the block communication 120 of the present embodiment, the total time of the transmission slot 121, the continuous reception slot 122, and the transmission slot 123 is equal to or shorter than the intermittent reception interval TD (7 seconds) of the sensor D, and the continuous reception slot 122 ( The transmission slot 125 includes 7 seconds after the section T1) in FIG. In this way, all the detectors D can receive the radio signal transmitted in any one of the transmission slots 121, 123, and 125. That is, for example, even when the intermittent reception timing of a certain sensor D is included in the continuous reception slot 122, the sensor D receives the radio signal transmitted in the transmission slot 125 at the next intermittent reception timing. be able to.

  As shown in FIG. 6B, when the sensor D receives a wireless signal from the wireless repeater B or the repeater repeater C, the sensor D transmits a shortened frame 102. The shortened frame 102 includes, for example, a synchronization signal, a group ID for identifying a transmission source, a transmission source address, data, and the like.

Here, the timing at which the sensor D transmits the shortened frame 102 as a response signal will be described. First, the continuous reception slots 122, 124, and 126 will be further described. As shown in FIG. 6A, the continuous reception slot 122 includes a sensor return slot 129 divided into areas for receiving radio signals from the respective sensors D. The sensor return slot 129 is divided into areas corresponding to the number of sensors D that can be connected to the group (in this embodiment, 30 areas). The continuous reception slots 124 and 126 are the same as the continuous reception slot 122.
When each sensor D receives any of the basic frames 101 transmitted in the transmission slots 121, 123, and 125, based on the frame number included in the received basic frame 101, each sensor D (transmission slots 121, 123). , 125) is completed. Based on the information regarding the timing of each area of the sensor return slot 129 stored in the storage element 1a of each sensor D in advance, the sensor D is assigned to itself among the areas of the sensor return slot 129. A radio signal is transmitted to the area (time zone) corresponding to the device number. For example, the sensor D having the device number 5 transmits a radio signal to the fifth area of the sensor return slot 129. In this way, by setting the reception time zone (the transmission time zone of the sensor D) by the sensor D, it is possible to suppress the destruction of the telegram due to the simultaneous transmission of signals by the plurality of sensors D. can do. Further, since radio signals from a plurality of sensors D can be received by one block communication 120, the time required for reception can be shortened.

Next, an operation example of the sensor D having different intermittent reception timing will be described with reference to FIG. First, the sensor D having the device number 01 shown in (B-1) of FIG. 6 receives the 45th basic frame 101 of the transmission slot 123 by intermittent reception, and continuously transmits a shortened frame 102 as a response thereto. Transmission is performed to the first area of the sensor return slot 129 of the reception slot 124. In addition, the sensor D having the device number 02 shown in FIG. 6B-2 receives the 48th basic frame 101 of the transmission slot 121 by intermittent reception, and continuously transmits a shortened frame 102 as a response thereto. Transmit to the second area of the sensor return slot 129 of the reception slot 122. In addition, the sensor D having the device number 03 shown in FIG. 6B-3 receives the 55th basic frame 101 of the transmission slot 125 by intermittent reception, and continuously transmits a shortened frame 102 as a response thereto. Transmit to the third area of the sensor return slot 129 of the reception slot 126.
In this way, each sensor D transmits a shortened frame in a continuous reception slot (any of the continuous reception slots 122, 124, 126) following the transmission slot (any of the transmission slots 121, 123, 125) that received the signal. 102 is transmitted.

FIG. 7 is a diagram illustrating a communication message transmitted by the repeater repeater in the state collection process according to the embodiment. More specifically, the communication message shown in FIG. 7 is transmitted from the repeater repeater C to the wireless repeater B or the repeater repeater C in the state collection process.
The communication slot 130 shown in FIG. 7 includes a transmission slot 131 that transmits a signal from the repeater repeater C to another repeater repeater C or the wireless repeater B, and a continuous reception slot that receives signals from other devices. 132.

The transmission slot 131 includes a plurality of continuous transmission frames 103 (10 in the present embodiment). That is, in the transmission slot 131, the continuous transmission frame 103 is continuously transmitted a plurality of times.
The transmission slot 131 is used to transmit a radio signal to the wireless repeater B or the repeater repeater C. Accordingly, the length of the transmission slot 131 is set to be longer than the length of the intermittent reception interval TB of the wireless repeater B and the intermittent reception interval TC of the repeater repeater C. The device C can receive any one of the continuous transmission frames 103 in the transmission slot 131.
Before starting transmission using the transmission slot 131, CS before transmission (carrier sense before transmission) is performed, and transmission is started after confirming that other devices are not transmitting radio signals.

  The continuous transmission frame 103 includes sensor information 201 and repeater repeater information 202. The sensor information 201 is composed of data areas corresponding to the number of sensors D (30 in this embodiment) that can communicate with one wireless repeater B. The repeater repeater information 202 includes data areas corresponding to the number of repeater repeaters C that can communicate with one wireless repeater B (6 in the present embodiment).

  The continuous reception slot 132 is a time zone in which a radio signal is not transmitted and reception of a signal from another device is waited for. A fire transfer signal area 133, a fire notification signal area 134, and other signal areas 135 Is provided. The continuous reception slot 132, the fire transfer signal area 133, the fire notification signal area 134, and the other signal area 135 are respectively the continuous reception slot 112, the fire transfer signal area 113, and the fire notification signal shown in FIG. The configuration is the same as the area 114 and the other signal area 115.

(Details of send / receive processing)
Next, (1) status collection processing and (2) fire notification processing will be further described including communication telegrams used in these processing.

(1) Status Collection Processing FIG. 8 is a diagram for explaining status collection processing according to the embodiment. In FIG. 8, among the communication paths for performing wireless communication with the wireless relay B1 shown in FIG. 1, the communication path F1 (the communication paths of the sensors D11 and D12) and the communication path F3 (the repeater relays C2 and C3). The communication path of the sensors D31 and D) will be described as an example.

First, it is assumed that the timing of the state collection processing in the group G1 has arrived.
(S301) The wireless repeater B1 transmits a status request signal to the lower device address stored in the storage element among the devices belonging to the communication path F1. In this example, since the subordinate devices in the communication path F1 of the wireless repeater B1 are the sensors D11 and D12, the wireless repeater B1 sends a status request signal to the block communication 120 (FIG. 6A). Send.
On the other hand, the detectors D11 and D12 perform intermittent reception at the intermittent reception interval TD, and receive the state request signal transmitted by the wireless repeater B1 in any of the transmission slots 121, 123, and 125 of the block communication 120. . In this example, it is assumed that the sensor D12 receives the status request signal transmitted in the transmission slot 123, and the sensor D11 receives the status request signal transmitted in the transmission slot 125.

(S302) Upon receiving the state request signal, the sensor D12 transmits a state information signal including its own state information by the shortened frame 102. More specifically, the state information signal is transmitted in the area corresponding to the device number of the sensor return slot 129 of the continuous reception slot 124 of the wireless repeater B1 (FIG. 6). The state information signal transmitted by the sensor D12 is received by the wireless repeater B1 (step S301).
(S303) Upon receiving the state request signal, the sensor D11 transmits a state information signal including its own state information by the shortened frame 102. More specifically, the status information signal is transmitted in the area corresponding to the device number of the sensor return slot 129 of the continuous reception slot 126 of the wireless repeater B1 (FIG. 6). The state information signal transmitted by the sensor D12 is received by the wireless repeater B1 (step S301).

The state collection process of the communication path F1 is completed by steps S301 to S303, and the wireless relay device B1 has collected the state information of the sensor D11 and the sensor D12.
In the example of FIG. 1, the state collection process of the communication path F2 is performed after the state collection process of the communication path F1 is completed. However, the processing content in the communication path F2 is included in the processing content of the communication path F3. The description is omitted here, and the state collection processing of the communication path F3 will be described below.

(S304) The wireless repeater B1 transmits a status request signal to the lower device address stored in the storage element among the devices belonging to the communication path F3. In this example, since the lower-order device in the communication path F3 of the wireless repeater B1 is the repeater repeater C2, the wireless repeater B1 sends a status request signal to the transmission slot 111 (FIG. 5) of the communication slot 110. Send. After transmitting the status request signal through the transmission slot 111, the wireless repeater B1 activates the reception function and shifts to the reception standby state of the continuous reception slot 112.
On the other hand, the repeater repeater C2 performs intermittent reception at the intermittent reception interval TC, and receives the state request signal transmitted by the wireless repeater B1 in the transmission slot 111.

  (S305) When the repeater repeater C2 receives the state request signal transmitted by the wireless repeater B1, the repeater repeater C2 relays and transmits the state request signal to the lower device address stored in its own storage element. In this example, since the lower-order device of the repeater repeater C2 is the repeater repeater C3, the repeater repeater C2 transmits the status request signal in the transmission slot 111 (FIG. 5) of the communication slot 110.

Here, the timing at which the repeater repeater C2 transmits the state request signal is a state in which the wireless repeater B1 is waiting for reception in the continuous reception slot 112 (S304). When the repeater repeater C2 receives the basic frame 101 of the communication slot 110 transmitted by the wireless repeater B in step S304, the repeater repeater C2 determines the wireless repeater B1 based on the frame number included in the received basic frame 101. The timing of the other signal area 115 in the continuous reception slot 112 is grasped. Then, the repeater repeater C2 transmits a status request signal to the repeater repeater C3 in a time zone including the other signal area 115 in the wireless repeater B1 (step S305).
The wireless repeater B1 receives the state request signal transmitted from the repeater repeater C2 to the repeater repeater C3 in the continuous reception slot 112 (see the broken line arrow in S304), so that the state request signal is normal to the other party. Recognize that it was received. Although not shown, when the status request signal transmitted by the repeater repeater C2 cannot be received in the continuous reception slot 112 in step S304, the wireless repeater B1 has an error such as a communication error. And the status request signal is retransmitted.
On the other hand, the repeater repeater C3 performs intermittent reception at the intermittent reception interval TC, and receives the state request signal transmitted by the repeater repeater C2 in step S305.

  (S306) When the repeater repeater C3 receives the state request signal transmitted by the repeater repeater C2, the repeater repeater C3 transmits a state request signal to the lower device address stored in its own storage element. In this example, since the subordinate devices of the repeater repeater C3 are the sensors D31 and D32, the repeater repeater C3 sends the status request signal to the transmission slots 121, 123, and 125 of the block communication 120 (FIG. 6A). Send in.

Here, the timing at which the repeater repeater C3 transmits the state request signal is a state in which the repeater repeater C2 is waiting for reception in the continuous reception slot 112 (S305). When the repeater repeater C3 receives the basic frame 101 of the communication slot 110 transmitted by the repeater repeater C2 in step S305, the repeater repeater C2 continuously receives the frame based on the frame number included in the received basic frame 101. The timing of the other signal area 115 in the slot 112 is grasped. Then, the repeater repeater C3 starts transmission of a status request signal to the sensor D in a time zone including the other signal area 115 in the repeater repeater C2 (step S306).
The repeater repeater C2 receives the status request signal transmitted by the repeater repeater C3 in the continuous reception slot 112 (see the dashed arrow in S305), thereby recognizing that the status request signal has been normally received by the other party. To do. Although not shown, if the status request signal transmitted by the repeater repeater C3 cannot be received in the continuous reception slot 112 in step S305, the repeater repeater C2 is assumed to have some abnormality such as a communication abnormality. Determine and retransmit the status request signal.
On the other hand, the sensors D31 and D32 perform intermittent reception at the intermittent reception interval TD, and receive the state request signal transmitted by the repeater repeater C3 in any of the transmission slots 121, 123, and 125. In this example, it is assumed that the sensor D32 receives the status request signal transmitted in the transmission slot 123, and the sensor D31 receives the status request signal transmitted in the transmission slot 125.

(S307) Upon receiving the state request signal, the sensor D32 transmits a state information signal including its own state information through the shortened frame 102. More specifically, the state information signal is transmitted in the area corresponding to the device number of the sensor return slot 129 of the continuous reception slot 124 of the wireless repeater B1 (FIG. 6). The status information signal transmitted by the sensor D32 is received by the repeater repeater C3 (step S306).
(S308) Upon receiving the state request signal, the sensor D31 transmits a state information signal including its own state information by the shortened frame 102. More specifically, the status information signal is transmitted in the area corresponding to the device number of the sensor return slot 129 of the continuous reception slot 126 of the wireless repeater B1 (FIG. 6). The state information signal transmitted by the sensor D31 is received by the repeater repeater C3 (step S306).

  Through these steps S306, 307, and 308, the repeater repeater C3 has collected the state information of its own lower devices (sensors D31 and D32).

(S309) The repeater repeater C3 transmits a status information signal to the upper device address stored in its own storage element. In this example, since the upper device of the repeater repeater C3 is the repeater repeater C2, the repeater repeater C3 transmits the status information signal through the transmission slot 131 (FIG. 7) of the communication slot 130.
Here, the continuous transmission frame 103 transmitted in step S309 includes the state information included in the state information signal from the sensors D31 and D32 received in step S306 in the sensor information 201 and the repeater repeater C3 itself. Status information is included in repeater repeater information 202. That is, the state information signal transmitted from the repeater repeater C3 includes the state information of the sensors D31 and D32 and the repeater repeater C3, which are lower devices of the repeater repeater C3.
On the other hand, the repeater repeater C2 performs intermittent reception at the intermittent reception interval TC, and receives the status information signal transmitted by the repeater repeater C3 in step S309.

(S310) When the repeater repeater C2 receives the state information signal transmitted by the repeater repeater C3, the repeater repeater C2 transmits a state information signal to the higher-level device address stored in its own storage element. In this example, since the host device of the repeater repeater C2 is the wireless repeater B1, the repeater repeater C2 is connected to the communication slot 130 transmitted by the repeater repeater C3 through the transmission slot 131 (FIG. 7) of the communication slot 130. A status information signal is transmitted at the timing of the other signal area 135.
Here, the sensor information 201 of the continuous transmission frame 103 transmitted in step S310 includes the status information of the sensors D31 and D32, and the repeater repeater information 202 includes the status information of the repeater repeaters C3 and C2. Yes. That is, the repeater repeater C2 transmits a signal obtained by adding its own state information to the state information signal received from the lower device as a state information signal.

Here, at the timing when the repeater repeater C2 transmits the state information signal, the repeater repeater C3 is in the reception standby state of the continuous reception slot 132 (S309). The repeater repeater C3 receives the state information signal transmitted to the wireless repeater B1 by the repeater repeater C2 in the continuous reception slot 132 (see the broken line arrow in S309), so that the state information signal is normal to the other party. Recognize that it was received. Although not shown, if the status information signal transmitted by the repeater repeater C2 cannot be received in the continuous reception slot 132 in step S309, the repeater repeater C3 is assumed to have some abnormality such as a communication abnormality. Determine and retransmit the status information signal.
On the other hand, the wireless repeater B1 performs intermittent reception at the intermittent reception interval TB, and receives the state request signal transmitted by the repeater repeater C2 in step S310.

(S311) When the wireless repeater B1 receives the status information signal transmitted by the repeater repeater C2, the timing of the other signal area 135 of the communication slot 130 transmitted by the repeater repeater C2 to the transmission source device. Then, a reception response signal that is a signal indicating that the signal has been received is transmitted.
The repeater repeater C2 receives the reception response signal transmitted by the wireless repeater B1 in the continuous reception slot 132 in step S310, and thereby recognizes that the status information signal has been normally received by the other party. Although not shown, when the reception response signal transmitted from the wireless repeater B1 cannot be received in the continuous reception slot 132 in step S310, the repeater repeater C2 has some abnormality such as a communication abnormality. And the state information signal is retransmitted.

  Although not shown, when the state collection processing of all communication paths of its own group is completed, the wireless repeater B1 determines the state of the signal including the collected state information, and if necessary, the state information. The information contained in the signal is transmitted to the fire receiver A. In step S311, the wireless repeater B1 transmits a reception response signal to the repeater repeater C2. However, wireless communication is performed between the wireless repeater B1 and the fire receiver A. If it is a structure, you may replace the signal containing the status information transmitted with respect to the fire receiver A from the radio | wireless repeater B1 with the reception response signal with respect to the repeater repeater C2.

  As described above, in the fire alarm system 100 according to the present embodiment, as shown in steps S305, S306, and S310 in FIG. 8, the status information signal transmitted from the repeater repeater C to the relay destination device is relayed. It also serves as a response signal indicating that it has been received by the original device. For this reason, compared with the case where the response signal which shows having received the signal normally is separately transmitted with respect to a relay origin apparatus, the frequency | count of signal transmission can be reduced, current consumption can be reduced, and communication traffic can be suppressed.

  In the block communication 120, not all slots (transmission slot 121, continuous reception slot 122, transmission slot 123, continuous reception slot 124, transmission slot 125, and continuous reception slot 126) need to be executed. When the status information signals from all the sensors D belonging to the path are received, the signal transmission can be stopped. For example, when the status information signals from all the sensors D are received in the continuous reception slot 122, the repeater repeater C or the wireless repeater B that is the transmission source of the block communication 120 Do not process. By doing so, it is not necessary to perform useless communication processing, and it is possible to shorten the time for the transmission processing of the state request signal. Since the time required to transmit the status request signal can be shortened, current consumption can be reduced and delay in information transmission can be prevented.

Also, in any of the continuous reception slots 122, 124, 126, when the status information signal cannot be received from the sensor D belonging to its own communication path, the repeater repeater C or the wireless repeater B The area of the sensor return slot 129 assigned to D is determined as “no response”, and is transmitted to a higher-level device as a state information signal including this area. As described above, even when the state information signal from a certain sensor D cannot be received, the repeater repeater C continues the subsequent state collection process, and therefore the state collection process in the communication path is a normal state as shown in FIG. It can be completed in the same processing time as the state collection process. Even when an abnormality occurs in the sensor D, the state collection processing is performed without any delay, so that the wireless repeater B can collect the state of the lower device without delay.
The repeater repeater C does not transmit a state information signal including its own “no response”, and the wireless repeater B is based on the lower device address (device number) stored in the storage element 21a. You may judge the state of.

(2) Fire Notification Processing FIG. 9 is a diagram for explaining fire notification processing. 9A shows a communication path F1 (communication path of the sensors D11 and D12) among the communication paths for performing wireless communication with the wireless repeater B1 shown in FIG. 1, and FIG. , Communication path F3 (communication path of repeater repeaters C2, C3 and sensors D31, 32). Hereinafter, the fire notification process will be described with reference to FIG. 9 and the above-described FIGS. The processing content of the communication path F2 in FIG. 1 is omitted here because the same processing is included in the communication path F3 and the processing content.

FIG. 9A shows an example where a fire has occurred in the monitoring area of the sensor D12.
(S401) Upon detecting the occurrence of a fire, the sensor D12 transmits a fire notification signal including fire detection information to the upper device address stored in the storage element 1a by the transmission slot 111 (FIG. 5) of the communication slot 110. To do. In this example, since the host device of the sensor D12 is the wireless repeater B1, the sensor D12 transmits a fire notification signal to the wireless repeater B1. After transmitting the fire notification signal through the transmission slot 111, the sensor D12 activates the reception function and shifts to the reception standby state of the continuous reception slot 112.
On the other hand, the wireless repeater B1 performs intermittent reception at the intermittent reception interval TB, and receives the fire notification signal transmitted by the sensor D12 in step S401.

(S402) When the wireless repeater B1 receives the fire notification signal from the sensor D12, the other signal area 115 of the communication slot 110 transmitted by the sensor D12 to the sensor D12 that is the transmission source device. At this timing, a reception response signal that is a signal indicating that the signal has been received is transmitted.
The sensor D12 receives the reception response signal transmitted by the wireless repeater B1 in the continuous reception slot 112 in step S401, and thereby recognizes that the fire notification signal has been normally received by the other party. Although not shown, if the reception response signal transmitted by the wireless repeater B1 cannot be received in the continuous reception slot 112 in step S401, the sensor D12 has assumed that some abnormality such as a communication abnormality has occurred. Determine and resend the fire notification signal.

FIG. 9B shows an example where a fire has occurred in the monitoring area of the sensor D31.
(S501) Upon detecting the occurrence of a fire, the sensor D31 transmits a fire notification signal to the upper device address stored in the storage element 1a by the transmission slot 111 (FIG. 5) of the communication slot 110. In this example, the upper device of the sensor D31 is the repeater repeater C3, so the sensor D31 transmits a fire notification signal to the repeater repeater C3. After transmitting the fire notification signal through the transmission slot 111, the sensor D31 activates the reception function and shifts to the reception standby state of the continuous reception slot 112.
On the other hand, the repeater repeater C3 performs intermittent reception at the intermittent reception interval TC, and receives the fire notification signal transmitted by the sensor D31 in step S501.

(S502) Upon receiving the fire notification signal from the sensor D31, the repeater relay C3 transmits the sensor D31 to the upper device address (here, the address of the repeater relay C2) stored in the storage element 11a. A fire transfer signal is transmitted at the timing of the fire transfer signal area 113 of the communication slot 110. After transmitting the fire transfer signal, the repeater repeater C3 activates the reception function and shifts to the reception standby state of the continuous reception slot 112.
The fire transfer signal transmitted by the repeater repeater C3 is received by the sensor D31 in the continuous reception slot 112 (see the broken arrow in S501), and the sensor D31 receives the fire transfer signal and receives the fire transfer signal transmitted by itself. It is recognized that the transfer signal is normally received by the repeater repeater C3.
On the other hand, the repeater repeater C2 that performs intermittent reception at the intermittent reception interval TC also receives the fire transfer signal transmitted by the repeater repeater C3.

(S503) When the repeater repeater C2 receives the fire transfer signal from the repeater repeater C3, the fire transfer signal is transmitted to the communication slot 110 transmitted by the repeater repeater C3 by the transmission slot 111 (FIG. 5). At the timing of the service area 113, it transmits to the higher-level device address (here, the address of the wireless repeater B1) stored in the storage element 11a. After transmitting the fire transfer signal, the repeater repeater C2 activates the reception function and shifts to the reception standby state of the continuous reception slot 112.
The fire transfer signal transmitted by the repeater repeater C2 is received by the repeater repeater C3 in the continuous reception slot 112 (see the broken arrow in S502), and the repeater repeater C3 transmits itself by receiving the fire transfer signal. It is recognized that the fire transfer signal has been normally received by the repeater repeater C2.
On the other hand, the wireless repeater B1 that performs intermittent reception at the intermittent reception interval TB also receives the fire transfer signal transmitted by the repeater repeater C2.

(S504) When the wireless repeater B1 receives the fire transfer signal from the repeater repeater C2, the repeater repeater C2 transmits the fire transfer signal to the repeater repeater C2 that is the transmission source of the fire transfer signal. A reception response signal is transmitted at the timing of the other signal area 115.
The repeater repeater C2 receives the reception response signal from the wireless repeater B1 in the continuous reception slot 112, and thereby recognizes that the fire transfer signal transmitted by itself is normally received by the wireless repeater B1. can do.

  Even if the repeater repeater C is interposed between the wireless repeater B and the sensor D as in the example of FIG. 9B, depending on the arrangement of devices and radio wave conditions, the detector In some cases, the wireless repeater B can directly receive the wireless signal transmitted from D. In such a case, the wireless repeater B receives and processes the fire notification signal transmitted from the sensor D. And even if the fire transfer signal from the repeater repeater C has not arrived, the wireless repeater B recognizes that a fire has occurred by the fire notification signal from the sensor D and receives a fire notification signal. Send to machine A. For this reason, the signal which notifies a fire from the sensor D to the fire receiver A can be transmitted at an early stage.

  8 and 9, each of the state collection process and the fire notification process has been described. For example, the sensor D may detect a fire during the state collection process. Thus, when both communication processes occur simultaneously, the fire notification facility 100 prioritizes the fire notification process. More specifically, when the repeater repeater C receives a fire notification signal from the sensor D while receiving or transmitting the state request signal, the repeater repeater C stops the transmission / reception process of the state request signal. Start the transmission process of the fire transfer signal. Thus, by giving priority to the transmission of the fire transfer signal, the delay in the transfer of the fire transfer signal can be suppressed.

  Here, an operation example when the detector D detects a fire during the state collection processing will be further described. FIG. 10 is a diagram for explaining an operation example when the sensor detects a fire during the state collection processing according to the embodiment. For convenience of explanation, FIG. The state collection process of the communication path F2 is described, and FIG. 10B illustrates the process when the sensor D32 detects a fire during the state collection process of the communication path F2. FIG. 10A is shown for comparison with FIG. 10B and is the same as the processing of FIG. 8, and thus detailed description thereof is omitted. Further, in FIGS. 10A and 10B, the same processing is denoted by the same reference numeral.

FIG. 10B shows a situation in which the sensor D32 detects a fire immediately before the repeater repeater C3 starts transmitting a status request signal to the sensor D.
As shown in step S306A, the repeater repeater C3 transmits a status request signal in the transmission slot 121 (FIG. 6A) of the block communication 120.
On the other hand, as shown in step S510, the sensor D32 that has detected a fire performs pre-transmission carrier sense before transmitting the fire notification signal. In this pre-transmission carrier sense, it is assumed that the sensor D32 receives the radio signal (state request signal) transmitted by the repeater repeater C3 in step S306A. Here, since the basic frame 101 is transmitted in the block communication 120 in step S306A, the sensor D32 cannot transmit the fire notification signal.

Therefore, the sensor D32 waits until the transmission slot 121 of the repeater repeater C3 is completed based on the frame number of the basic frame 101 received by the carrier sense before transmission. Thereafter, as shown in step S511, the sensor D32 performs the transmission slot 111 of the communication slot 110 with respect to the area corresponding to its own number in the sensor return slot 129 of the continuous reception slot 122 of the repeater repeater C3 (FIG. 6). A fire notification signal is transmitted by (FIG. 5). When comparing FIG. 10A and FIG. 10B, the sensor D transmits its own status information signal in the normal state shown in FIG. 10A (S307), but when a fire is detected, The fire notification signal is transmitted as shown in FIG. 10 (B) (S511).
Note that the transmission is not limited as described above, and transmission may be performed at any timing of the continuous reception slots 122, 124, and 126.

As shown in step S306A, the repeater repeater C3 receives the fire notification signal from the sensor D32 in the continuous reception slot 122 of the block communication 120. At this time, the repeater repeater C3 determines that the received signal is a fire notification signal. The repeater repeater C3 that has received the fire notification signal stops the block communication 120 in step S306A, and transmits a fire transfer signal to the repeater repeater C2, as shown in step S512. After the repeater repeater C3 transmits the fire transfer signal at the timing of the fire transfer signal area 113 of the communication slot 110 transmitted by the sensor D32, the repeater relay C3 activates the reception function and shifts to the reception standby state of the continuous reception slot 112. To do.
The fire transfer signal transmitted by the repeater repeater C3 is received by the sensor D32 in the fire transfer signal area 113 of the continuous reception slot 112 (see the broken arrow in S511), and the sensor D32 receives the fire transfer signal. Thus, it is recognized that the fire notification signal transmitted by itself is normally received by the repeater repeater C3. If the fire transfer signal transmitted by the repeater repeater C3 cannot be received, the sensor D32 recognizes that the fire notification signal is not normally received by the repeater repeater C3, and repeats the process of step S511 to fire. When the transfer signal is received, the transmission of the fire notification signal is stopped.

  On the other hand, the repeater repeater C2 that performs intermittent reception at the intermittent reception interval TC also receives the fire transfer signal transmitted by the repeater repeater C3. The processes in steps S513 and S514 are the same as the processes in steps S503 and S504 shown in FIG.

  In FIG. 10B, when the fire transfer signal is transmitted from the repeater repeater C3 while the repeater repeater C2 is transmitting the status request signal in step S305, the repeater repeater C2 The fire transfer signal is transmitted in the same manner as in step S513.

Next, another example of operation when the sensor D detects a fire during the state collection process will be described. FIG. 11 is a diagram for explaining another operation example when the sensor detects a fire during the state collection processing according to the embodiment.
FIG. 11 shows a situation in which the detector D32 detects a fire while the repeater repeater C3 is transmitting the status information signal in step S309 shown in FIG.
As shown in step S520, the detector D32 that has detected the fire performs carrier detection before transmission before transmitting the fire notification signal. In this pre-transmission carrier sense, it is assumed that the sensor D32 has received the radio signal transmitted by the repeater repeater C3 in step S309A. Here, since the continuous transmission frame 103 is transmitted in step S309A, the sensor D32 cannot transmit the fire notification signal in order to receive the continuous transmission frame 103 by the carrier sense before transmission. Then, the sensor D32 waits until the transmission slot 131 is completed based on the frame number of the continuous transmission frame 103 received by the carrier sense before transmission. Then, as shown in step S <b> 521, at the timing of the fire notification signal area 134 of the continuous reception slot 132, the sensor D <b> 32 transmits a fire signal to the fire notification signal area 134 of the continuous reception slot 132. In this way, the sensor D transmits a signal to the corresponding area of the receiving device depending on the type of signal to be transmitted. In this way, by determining the reception time zone (transmission time zone in the transmission side device) according to the type of signal, it is possible to suppress the destruction of the message by simultaneously transmitting multiple types of signals. Can do. Further, since the reception area (time zone) in the receiving device is divided according to the type of signal to be transmitted, priority can be given to transmission of a fire signal with high importance, and the fire signal can be transmitted early.

  As described above, in the state collection processing according to the present embodiment, when the repeater repeater C receives the fire notification signal from the sensor D during the transmission of the state request signal, the state request signal by the block communication 120 is transmitted. Stops sending and starts sending fire transfer signals. By doing in this way, the signal which notifies the fire transmitted from the sensor D can be received by the wireless repeater B more quickly. For example, as can be seen with reference to FIG. 10A and FIG. 10B, when the fire notification process is started after the state collection process shown in FIG. The time until the fire transfer signal reaches B1 is longer than that in FIG. However, according to the present embodiment, the wireless repeater B1 can receive the fire transfer signal earlier.

  Even if the repeater repeater C is interposed between the wireless repeater B and the sensor D, for example, the wireless signal from the sensor D is transmitted to the wireless repeater B depending on the arrangement of devices and the radio wave condition. Can be directly received, the wireless repeater B receives and processes the fire notification signal from the sensor D. For this reason, even if the fire transfer signal from the repeater repeater C has not arrived, the wireless repeater B can recognize that a fire has occurred by the fire notification signal transmitted from the sensor D. Thus, the wireless repeater B can recognize the fire detected by the sensor D earlier. Further, the wireless repeater B transfers the fire notification signal from the sensor D to the fire receiver A, so that a signal notifying the fire from the sensor D to the fire receiver A can be transmitted at an early stage.

  Moreover, the repeater repeater C and the sensor D transmit a signal to the corresponding area of the receiving device depending on the type of signal to be transmitted. In this way, by determining the reception time zone (transmission time zone in the transmission side device) according to the type of signal, it is possible to suppress the destruction of the message by simultaneously transmitting multiple types of signals. Can do. Further, since the reception area (time zone) in the receiving device is divided according to the type of signal to be transmitted, priority can be given to transmission of a fire signal with high importance, and the fire signal can be transmitted early.

  In the above embodiment, when the wireless repeater B receives the state request signal from the fire receiver A, the state information signal of the sensor D and the like of each path is transmitted to the fire receiver A. Without being limited thereto, the wireless repeater B may collect the state and determine the state of the sensor D and the like of each path at its own timing. In this case, a state information signal may be transmitted to the fire receiver A when a fire or abnormality (battery exhaustion, no response, etc.) is necessary.

  1 control circuit, 1a memory element, 2 battery, 3 voltage regulator circuit, 4 voltage detection circuit, 5 transmission / reception circuit, 5a transmission circuit, 5b reception circuit, 6 antenna, 7 fire detection circuit, 8 indicator lamp circuit, 9 registration switch, DESCRIPTION OF SYMBOLS 11 Control circuit, 11a Memory element, 20a Power line terminal, 20b Signal line terminal, 21 Control circuit, 21a Memory element, 22 Receiver I / F circuit, 100 Fire alarm equipment, 101 Basic frame, 102 Short frame, 103 Continuous transmission frame, 110 communication slot, 111 transmission slot, 112 continuous reception slot, 113 fire transfer signal area, 114 fire notification signal area, 115 other signal area, 120 block communication, 121 transmission slot, 122 continuous reception slot, 123 transmission slots, 124 continuous reception slots, 25 Transmission slot, 126 Continuous reception slot, 129 Sensor return slot, 130 Communication slot, 131 Transmission slot, 132 Continuous reception slot, 133 Fire transfer signal area, 134 Fire notification signal area, 135 Other signal area, 201 Sensing Equipment information, 202 repeater repeater information, A fire receiver, B wireless repeater, C repeater repeater, D sensor, F1 communication path, F2 communication path, F3 communication path, F4 communication path.

Claims (3)

A sensor that detects environmental changes based on fire phenomena and transmits and receives wireless signals;
A fire receiver for monitoring and controlling the sensor;
One or a plurality of repeaters that are interposed between the sensor and the fire receiver and constitute a plurality of communication layers and relay radio signals,
Based on the status request signal transmitted from the upper device in the communication layer, the lower device in the communication layer is a fire alarm facility that performs a state collection process of transmitting a state information signal including its own device state information,
In the state collection process,
When the sensor detects a fire, it sends a fire signal to the repeater, which is a host device.
The repeater transmits the state request signal according to a transmission pattern in which a transmission period and a transmission suspension period are alternately repeated a predetermined number of times, and the relay is the fire signal transmitted from the sensor or the subordinate device When receiving the fire signal relayed by a device, the transmission of the status request signal to the lower-level device is stopped and the fire signal is transmitted to the higher-level device. In the state collection process,
The repeater is
Start the receiving function in the previous Symbol transmission suspension period,
2. The fire alarm system according to claim 1, wherein when the fire signal is received from a lower-level device in the transmission suspension period, transmission of a status request signal in the next transmission period is stopped. A plurality of the repeaters are provided in the fire alarm facility,
When the repeater directly receives the fire signal transmitted from the sensor, which is a lower-order device of the repeater that is its own lower-level device, the repeater transmits the fire signal to its upper-level device. The fire alarm equipment according to claim 1 or 2, characterized by the above.

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