JP5783787B2 - Fire alarm system - Google Patents

Description

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

  Conventionally, there is a wireless communication system that transmits a shut-off command to a gas meter or the like in conjunction with detection by a detector such as methane or CO. In the system, for example, when an abnormality such as gas leakage occurs, the detector transmits a detection signal to the wireless slave unit. The wireless slave device transmits a signal including detection information to the wireless master device. The wireless master unit identifies the detection information of the received signal, and sends a cutoff command to the wireless slave unit connected to the gas meter in the case of an emergency such as abnormal gas leakage or fire, depending on the content of the detection information. And shut off the gas meter. In the case of low urgency such as power failure, the wireless master device transmits a detection signal to the center (see, for example, Patent Document 1).

JP 2000-134345 A (paragraph [0019])

  In the above-described conventional technique, a signal with high urgency cannot be transmitted during transmission of a signal with low urgency previously transmitted.

  The present invention has been made in order to solve the above-described problems. When the sensor can preferentially transmit state information with high urgency, and there is no confirmation response from the repeater for the transmitted signal. It aims at providing the fire alarm equipment which can be transmitted again.

The fire alarm system according to the present invention includes a sensor that detects an environmental change based on a fire phenomenon and transmits / receives a radio signal, a fire receiver that monitors and controls the sensor, and the sensor and the fire receiver. interposed between a relay device among you relaying radio signals, interposed between said repeater and said sensor, and a repeater relay for relaying at least a radio signal,
The repeater and the repeater repeater have a continuous reception slot that activates a reception function for a predetermined time after the transmission period ends, and the continuous reception slot is distinguished in advance from the highest importance according to the type of signal. Multiple wireless signal areas are set up,
When transmitting the radio signal, the sensor performs carrier sense to determine whether the radio signal from the repeater repeater is received, and is included in the radio signal when the radio signal is received. Based on the frame number, after the repeater repeater has finished transmitting , transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot ,
The repeater repeater determines whether or not a wireless signal is received from the repeater by performing carrier sense at least when transferring a wireless signal from the sensor, and when a wireless signal is received Based on the frame number included in the radio signal, after the repeater has finished transmitting, transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot,
When the repeater receives a wireless signal from the sensor via the repeater repeater and transmits a wireless signal indicating the confirmation response to the repeater repeater, the repeater repeater completes transmission. Later, transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot,
The continuous reception slot in the repeater repeater is configured to receive a radio signal transmitted from the sensor and the repeater .

According to the present invention, when transmitting a radio signal, the sensor performs carrier sense to determine whether the radio signal from the repeater is received, and when the radio signal is received, the radio signal On the basis of the frame number included in the relay, after the transmission is completed, the repeater transmits in a predetermined time range previously distinguished by the signal type of the continuous reception slot. As a result, the repeater can preferentially capture the radio signal with high urgency into the fire receiver even if the highly urgent event detection and the low event detection occur from different sensors almost simultaneously.
In addition, when a confirmation response from the repeater is not detected when a radio signal is transmitted, the radio signal is retransmitted in the time range, so processing for a radio signal with high urgency is delayed. There is no such thing.

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 flowchart which shows the operation example of the retransmission in the fire alerting | reporting installation of embodiment.

(overall structure)
FIG. 1 is a system configuration diagram illustrating an example 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 present embodiment transmits a fire receiver A, a wireless repeater B1 connected to the fire receiver A via a transmission line CL1, and a fire receiver A. A wireless repeater B2 connected by a line CL2, and wireless sensors D11, D12, D21, D22, D31, D32, D41, D42, D43 arranged on the ceiling of each room of the building to be monitored; A repeater relay C1 that relays a wireless signal interposed between the wireless relay B1 and the sensors D21 and D22, and a wireless signal interposed between the wireless relay B1 and the sensors D31 and D32. Repeater repeaters C2 and C3 are provided.

  The external tester E shown in FIG. 1 performs a remote test using radio signals for the wireless repeaters B1 and B2, and also confirms the status at the time of registration of the communication paths F1, F2, F3, and F4. It is equipment to be used.

  In the following, the wireless repeaters B1 and B2 are replaced with the wireless repeater B, the sensors D11, D12, D21, D22, D31, D32, D41, D42, and D43 are detected with the sensor D, and the repeater repeaters C2, C3 May be collectively referred to as repeater repeater C.

  Here, a set of the wireless repeater B and the sensor D and the repeater repeater C that perform wireless communication with 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, a repeater repeater C1, C2, C3 and sensors D11, D12, D21, D22, D31, D32 that perform wireless communication with the wireless repeater B1 and the wireless repeater B1 are grouped. Called G1. Further, the wireless repeater B2 and the sensors D41, D42, and D43 that perform wireless transmission / reception with the wireless repeater B2 are referred to as a group G2.

  In each group, a plurality of communication paths starting from the wireless repeater B are established. In the example of the group G1 in FIG. 1, a communication path F1 is established between the wireless relay B1 and the sensors D11 and D12, and the wireless relay B1 and the repeater relay C1 and the repeater relay C1 and the sensor. A communication path F2 is established between D21 and D22. A communication path F3 is established between the wireless repeater B1 and repeater repeaters C2 and C3, and between the repeater repeater C3 and the sensors D31 and D32. Further, in the example of the group G2 in FIG. 1, a communication path F4 is established between the wireless repeater B2 and the sensors D41, D42, and D43.

(Sensor D)
The sensor D detects a physical quantity or a physical change of a detection target based on a fire phenomenon, and transmits a state signal corresponding to the detected content as a radio signal. As the sensor D, for example, a wireless smoke detector that outputs an analog value based on the detected smoke density or a fire signal as a wireless signal, or a wireless type that outputs an analog value or fire signal based on the detected ambient temperature as a wireless signal The heat sensor is used.

  FIG. 2 is a block diagram showing a main configuration of the sensor in 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 a DC voltage to the constant voltage circuit 3. The constant voltage circuit 3 controls the DC 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.

  For example, the voltage detection circuit 4 detects a DC voltage of the battery 2 applied to the constant voltage circuit 3 and outputs a battery voltage detection signal corresponding to the detection voltage to the control circuit 1. When the voltage detection circuit 4 detects that the remaining battery level has dropped or has fallen below the threshold value for running out of the battery, the voltage detection circuit 4 outputs it to the control circuit 1 to operate the indicator lamp circuit 8 and to display the battery running out status information. The state signal including the signal 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 the light emitting diode (LED). For example, when the battery is dead, the LED blinks, and when a fire is detected by the fire detection circuit 7, the cycle is different from the blinking. To blink the LED.

  The transmission / reception circuit 5 is connected to an antenna 6 for transmitting / receiving radio signals, 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 received from the antenna 6, and when the radio signal is addressed to itself, performs a reception process according to the contents. 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. When the control circuit 1 determines that it is in a fire state, the control circuit 1 controls the indicator lamp circuit 8 and issues an alarm by blinking the LED. In addition, the control circuit 1 performs necessary processing based on the signal received by the transmission / reception circuit 5 and controls the transmission / reception circuit 5 as necessary to send a status signal to the wireless repeater B or the repeater repeater C. Send fire signals. The storage element 1a is composed of a nonvolatile memory such as an EEPROM, for example, and stores a program executed by the control circuit 1, various data, and its own address.

  As will be described later, the control circuit 1 transmits a registration request signal to another device when the registration switch 9 is turned on. When a registration signal indicating that the wireless relay B from the wireless relay B has registered the sensor D is received by the transmission of the registration request signal, for example, a communication path with the wireless relay B is established. Establish.

(Repeater repeater C)
The repeater repeater C is interposed between the wireless repeater B and the sensor D and relays wireless signals. The repeater repeater C is provided when radio waves do not reach each other between the wireless repeater B and the sensor D. 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 the repeater repeater in 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. Unlike the above-mentioned sensor D, the repeater repeater C does not include the fire detection circuit 7 and the operation content of the control circuit 11 is different, but the other configurations are basically the same as the sensor D. . Note that the repeater repeater C may be provided with a fire detection circuit 7 such as the sensor D shown in FIG. 2 or a sensor that senses smoke, heat, or the like, and the repeater repeater C may have a fire detection function.

  The control circuit 11 transmits a registration request signal to another device when the registration switch 10 is operated. When a registration signal indicating that the wireless repeater B from the wireless repeater B has registered the repeater repeater C is received by the transmission of the registration request signal, communication is performed with the wireless repeater B. Establish a route.

(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 transferring the wireless signal from the sensor D or the repeater repeater C to the fire receiver A. Yes. A storage element (not shown) stores a program for executing the function of the repeater B, various data, group ID, registered device address, communication path information (described later), and the like.

  When the registration request signal is received when the registration switch 9 is in the ON state, the wireless repeater B registers that it has been registered in the sensor D or the repeater repeater C that has issued the registration request signal. A signal is transmitted to establish a communication path. The wireless repeater B changes the communication route to the sensor D to the repeater repeater C when a route change signal is received from the repeater repeater C after establishing the communication route.

FIG. 4 is a block diagram showing a main configuration of the wireless repeater in 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 repeater B through a wireless signal via the repeater repeater 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 activates a fire door, a smoke exhauster, 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 period.

(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 subordinate device to transmit the status information of the device itself, and the device that has received the status request signal further transmits to the subordinate device thereof. 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.

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.
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.

(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 includes a transmission source (wireless repeater B or repeater repeater C) to a repeater repeater C, or a transmission source (repeater repeater C or sensor D) to a 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. A fire transfer signal area 113 is an area for receiving a fire transfer signal transferred from another device, a fire notification signal area 114 is an area for receiving a fire notification signal transmitted from the sensor D, and other signals. The area 115 is an area for receiving a control request signal or status information signal other than the fire transfer signal and the fire notification signal. Other devices can transmit corresponding signals to the fire transfer signal area 113, the fire notification signal area 114, and the other signal area 115. 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 slot 122 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).
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 receives the 45th basic frame 101 of the transmission slot 123 by intermittent reception, and sends a shortened frame 102 as a response to the basic frame 101 of the sensor return slot 129 of the continuous reception slot 124. Transmit to the first area. The sensor D with the device number 02 receives the 48th basic frame 101 of the transmission slot 121 by intermittent reception, and sends a shortened frame 102 as a response to this to the sensor return slot 129 of the continuous reception slot 122. Transmit to the second area. The sensor D number 03 receives the 55th basic frame 101 of the transmission slot 125 by intermittent reception, and sends the shortened frame 102 as a response thereto to the sensor return slot 129 3 of the continuous reception slot 126. Send to the second area.
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 by 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 wireless repeater B1 has received a status request signal from the fire receiver A.
(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).
(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 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, at the timing when the repeater repeater C2 transmits the state request signal, the wireless repeater B1 is in the reception standby state of the continuous reception slot 112 (S304). 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 in S304), and the state request signal is normally transmitted to the other party. Recognize that it has been 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, at the timing when the repeater repeater C3 transmits the state request signal, the repeater repeater C2 is in the reception standby state of the continuous reception slot 112 (S305). The repeater repeater C2 receives the status request signal transmitted by the repeater repeater C3 in the continuous reception slot 112 (see the broken line in S305), and thereby recognizes that the status request signal has been normally received by the other party. . 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).
(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).

  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. The continuous transmission frame 103 transmitted at this time 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 also repeats the state information of the repeater relay C3 itself. It is included in the vessel 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 uses the transmission slot 131 (FIG. 7) of the communication slot 130 to transmit the communication slot 130 transmitted by the repeater repeater C3. The status information signal is transmitted at the timing of the other signal area 135. The sensor information 201 of the continuous transmission frame 103 transmitted at this time includes state information of the sensors D31 and D32, and the repeater repeater information 202 includes state information of the repeater repeaters C3 and C2. 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 status information signal transmitted to the wireless repeater B1 by the repeater repeater C2 in the continuous reception slot 132 (see the broken line in S309), and the status information signal is normally transmitted to the other party. Recognize that it has been 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. 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. In this way, it is not necessary to perform useless communication processing, 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 sensor return slot 129 assigned to D is determined as “no response”, and is transmitted to a higher-level device as a status information signal including this.
Note that the repeater repeater C does not transmit a status information signal including its own “no response”, and the wireless repeater B makes a determination based on the lower device address (device number) stored in the storage element 21a. May be.

(2) Fire Notification Processing FIG. 9 is a diagram for explaining fire notification processing according to the embodiment. 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 signal including fire detection information to the higher-level device address stored in the storage element 1a through the transmission slot 111 (FIG. 5) of the communication slot 110. . In this example, since the host device of the sensor D12 is the wireless relay B1, the sensor D12 transmits a fire signal to the wireless relay B1. After transmitting the fire 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 signal transmitted by the sensor D12 in step S401.

(S402) Upon receiving the fire signal from the sensor D12, the wireless repeater B1 transmits to the sensor D12, which is the transmission source device, the other signal area 115 of the communication slot 110 transmitted by the sensor D12. A reception response signal that is a signal indicating that the signal has been received at the timing 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 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 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 signal to the upper device address stored in the storage element 1a through the transmission slot 111 (FIG. 5) of the communication slot 110. In this example, since the host device of the sensor D31 is the repeater repeater C3, the sensor D31 transmits a fire signal to the repeater repeater C3. After transmitting the fire 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 signal transmitted by the sensor D31 in step S501.

(S502) When the repeater repeater C3 receives the fire signal from the sensor D31, the communication transmitted by the sensor D31 to the host device address (here, the address of the repeater repeater C2) stored in the storage element 11a. A fire transfer signal is transmitted at the timing of the fire transfer signal area 113 in the 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 line in S501), and the sensor D31 receives the fire transfer signal and receives the fire signal transmitted by itself. 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). It transmits with respect to the high-order apparatus address (here address of wireless relay device B1) memorize | stored in the memory element 11a at the timing of the service area 113. 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 at the continuous reception slot 112 (see the broken line in S502), and the repeater repeater C3 transmits the fire transfer signal by receiving the fire transfer signal. It recognizes that the fire 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.

  Note that, even in the configuration in which the repeater repeater C is interposed between the wireless repeater B and the sensor D as in the example of FIG. In some cases, the wireless repeater B can directly receive the fire signal transmitted from the device D. In such a case, the wireless repeater B recognizes that a fire has occurred due to the fire signal transmitted from the sensor D even if the fire transfer signal from the repeater repeater C has not arrived, and fires the fire signal. Transmit to receiver A. For this reason, a fire signal can be transmitted from the sensor D to the fire receiver A 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 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, it is possible to suppress the delay in the transfer of the fire signal.

Here, an example of operation 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.
FIG. 10 shows a situation in which the detector D32 detects a fire while the repeater repeater C is transmitting the status information signal in step S309 shown in FIG.
As shown in step S510, the sensor D32 that has detected a fire performs carrier detection before transmission before transmitting a fire signal. In this pre-transmission carrier sense, it is assumed that the sensor D32 receives the radio signal transmitted by the repeater repeater C3 in step S309. Here, since what is transmitted in step S309 is the continuous transmission frame 103, the sensor D32 cannot transmit a fire 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. At the timing of the fire notification signal area 134 of the continuous reception slot 132, the sensor D32 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.

(Retransmission timing)
Next, in the system shown in FIG. 1, when the detector D transmits a fire notification signal or an abnormal signal when the own device is abnormal, the communication slot 110 transmits, and when the repeater repeater C is a fire transfer signal or the own device is abnormal. The re-transmission will be described when there is no confirmation response signal from the wireless repeater B even if the abnormal signal is transmitted through the communication slot 130.

The detector D performs a carrier sense before transmission when transmitting a fire notification signal or an abnormal signal by a radio signal and performs a radio signal (communication slot 110 or block communication 120) from the radio repeater B or repeater repeater C. Alternatively, it is determined whether or not the communication slot 130) is received, and when a radio signal is received, continuous reception after waiting until the transmission slot ends based on the frame number of the transmission slot included in the radio signal In the slot, transmission is performed in a predetermined time range that is previously distinguished by the type of signal.
For example, when the sensor D detects a fire, it performs carrier sense before transmission and receives the basic frame 101 of the transmission frames 121, 123, and 125 of the block communication 120 from the repeater repeater C or the wireless repeater B. Then, it transmits in the fire notification signal area (not shown) in any of the continuous reception slots 122, 124, and 126.
When the sensor D detects a fire and performs carrier sense before transmission and receives the basic frame 101 of the transmission slot 110 from the repeater repeater C or the wireless repeater B, the fire of the continuous reception slot 112 occurs. It transmits in the area 114 for notification signals.
Further, when the detector D detects a fire and performs carrier sense before transmission and receives any continuous frame 103 of the transmission slot 130 from the repeater repeater C, the fire notification signal area 134 of the continuous reception slot 132 is received. Send in.
On the other hand, when the sensor D detects an abnormality, carrier sense before transmission is performed, and the basic frame 101 of any of the transmission frames 121, 123, and 125 of the block communication 120 is transmitted from the repeater repeater C or the wireless repeater B. When received, the signal is transmitted in the other signal area (not shown) in any of the continuous reception slots 122, 124, and 126.
When the sensor D detects an abnormality and performs carrier sense before transmission and receives either the basic frame 101 of the transmission slot 110 from the repeater repeater C or the wireless repeater B, the other of the continuous reception slot 112 is received. The signal is transmitted in the signal area 115.
Further, when the sensor D detects an abnormality and performs carrier sense before transmission and receives the continuous frame 103 of the transmission slot 130 from the repeater repeater C or the wireless repeater B, the continuous reception slot 132 It is transmitted in the other signal area 135.
In these cases, if an acknowledgment signal is not received from the wireless repeater B or repeater repeater C, it is retransmitted in the next continuous reception slot according to the signal type.

For example, when the repeater repeater C transfers the fire notification signal of the sensor D, any of the transmission frames 121, 123, 125 of the block communication 120 from the repeater repeater C or the wireless repeater B is performed by performing carrier sense before transmission. When the basic frame 101 is received, it is transmitted in a fire transfer signal area (not shown) in any one of the continuous reception slots 122, 124, and 126.
Further, when the repeater repeater C performs a carrier sense before transmission when transferring the fire notification signal of the sensor D, and receives the basic frame 101 of any of the transmission slots 110 from the repeater repeater C or the wireless repeater B. Then, the data is transmitted in the fire transfer signal area 113 of the continuous reception slot 112.
Further, when the repeater repeater C transfers the fire notification signal of the sensor D, it performs carrier sense before transmission and receives the continuous frame 103 in either of the transmission slots 130 from the repeater repeater C or the wireless repeater B. Then, it transmits in the fire transfer signal area 133 of the continuous reception slot 132.
For example, when the repeater repeater C detects an abnormality, carrier sense before transmission is performed and the basic frame 101 of any of the transmission frames 121, 123, and 125 of the block communication 120 is transmitted from the repeater repeater C or the wireless repeater B. When received, the signal is transmitted in the other signal area (not shown) in any of the continuous reception slots 122, 124, and 126.
Further, when the repeater repeater C detects an abnormality and performs carrier sense before transmission and receives either the basic frame 101 of the transmission slot 110 from the repeater repeater C or the wireless repeater B, the continuous reception slot 112 Transmission is performed in the other signal area 115.
Further, when the repeater repeater C detects an abnormality and performs carrier sense before transmission and receives any continuous frame 103 of the transmission slot 130 from the repeater repeater C, the other signal area 135 of the continuous reception slot 132 is received. Send in.
In these cases, if an acknowledgment signal is not received from the wireless repeater B or repeater repeater C, it is retransmitted in the next continuous reception slot according to the signal type.

  Further, the repeater repeater C2 on the side close to the wireless repeater B transmits the abnormal signal when detecting its own device abnormality, and the wireless signal from the repeater repeater C3 on the side close to the sensor D Is transmitted, carrier sense before transmission is performed to determine whether or not a radio signal (communication slot 110) is received from the wireless repeater B. When a radio signal is received, it is included in the radio signal. In a continuous reception slot after waiting until the transmission slot 111 is completed based on the frame number of the transmission slot 111 to be transmitted, a predetermined time range (fire transfer signal area, fire notification signal Area, other signal areas). In the case of an abnormal signal, it is transmitted in the other signal area. When the radio signal from the repeater repeater C3 is a fire signal, it is transmitted in the fire transfer signal area. When the radio signal is a status information signal Is transmitted in the other signal area.

  The repeater repeater C3 performs carrier sense before transmission when transmitting an abnormal signal when an abnormality of its own device is detected, or when transferring a radio signal from the sensor D, and repeater repeater C2 Until the transmission slot 111 is completed based on the frame number of the transmission slot 111 included in the wireless signal. In the continuous reception slot after waiting, transmission is performed in a predetermined time range (fire transfer signal area, other signal area) previously distinguished according to the type of signal. In the case of an abnormal signal, it is transmitted in the other signal area. When the radio signal from the repeater repeater C2 is a fire signal, it is transmitted in the fire transfer signal area. When the radio signal is a status information signal Is transmitted in the other signal area. Further, when the repeater repeater C3 does not detect an acknowledgment signal when transmitting a radio signal, the repeater repeater C3 retransmits the radio signal in the next continuous reception slot according to the type of signal.

FIG. 11 is a flowchart illustrating an operation example of retransmission in the fire alarm facility according to the embodiment.
When the power is turned on, that is, when the battery voltage is in a state necessary for operation (S1), the sensor D determines whether or not a transmission factor due to a self factor has occurred (S2). That is, it is determined whether a fire has been detected or whether the battery voltage has become lower than a predetermined value. For example, the detector D proceeds to S3 when a fire is detected, and determines whether a message from the wireless repeater B (or repeater repeater C) by intermittent reception has been received when no transmission factor has occurred. (S8).

  The sensor D returns to S2 when the reception of the electronic message is not detected, and repeats the determination described above, but analyzes the electronic message when the reception of the electronic message is detected (S9). The sensor D determines whether or not a transmission factor has occurred for the analyzed received message (S10). The sensor D returns to S2 when it is determined that the transmission factor is not generated, but is transmitted when it is determined that the transmission factor is generated, for example, it is necessary to transmit the status information signal by receiving the status request signal. A previous carrier sense is performed (S3).

  If the carrier D is not detected as a result of performing the carrier sense before transmission, the sensor D determines that it is OK and transmits a telegram (fire signal, or abnormal signal, or status information signal). Then, the sensor D enters the continuous reception process and determines whether or not a confirmation response message (signal) from the higher-level device has been received (S6). When the confirmation response message from the higher-level device has not been detected, The process proceeds to S11 to confirm the transmission contents. When the message is detected, the transmission process is terminated (S7), and the process returns to S2 to determine whether or not a transmission factor due to the self factor has occurred.

  As a result of performing the carrier sense before transmission in S4, the sensor D proceeds to S12 when a carrier is detected, and analyzes the result. For example, when the wireless signal from the wireless repeater B, for example, the block communication 120 is received, the sensor D waits until the transmission slot is completed based on the frame number of one of the transmission slots 121, 123, and 125. Analyze the waiting time of. And the sensor D determines whether the message | telegram which became a transmission factor in S2 or S10 is a fire transfer (S13). Since the detector D does not have a fire notification signal transfer function, it is determined whether or not the message is a fire signal notification (S15). Preparation is made so that it can be transmitted in the signal area (S16), and when the message is an abnormal signal, it is retransmitted and preparation is made so that it can be transmitted in the other signal area (S17, S18).

  The sensor D confirms the content of the transmission message when there is no confirmation response from the host device for the transmission message (S11). When the content is a fire signal notification, preparations are made to retransmit in the fire notification signal area of the continuous reception slot as described above (S15, S16). When the transmission content is an abnormal signal, the same as above To prepare for retransmission in the other signal area of the continuous reception slot (S17, S18).

  Thereafter, the sensor D performs carrier sense before transmission again (S3), and transmits a message when it is determined that the result is OK (S4, S5). For example, when transmitting the transmission message, the sensor D waits until the transmission slot 121 of the block communication 120 ends, for example, and when the transmission message is a notification of a fire signal, the fire notification signal of the continuous reception slot 122 A fire signal is sent to the area when the timing is reached. When the transmission message is a status information signal, the sensor D transmits the status information signal to the area for the other signal in the continuous reception slot 122. If there is no confirmation response from the host device even if the above-mentioned message is retransmitted, it is repeated until there is a confirmation response.

  The above-described operation is the sensor D, but the repeater repeater C performs the same operation. That is, when the battery voltage drops below a predetermined value as a transmission factor due to a self factor, or when the device itself is abnormal, a signal notifying that is transmitted. If the received message by intermittent reception is a status request signal for itself, a status information signal is transmitted, and if the received message by intermittent reception is a fire signal or status information signal from sensor D, it is transferred. To do. When transmitting or transferring the message, carrier sense before transmission is performed.

  When the pre-transmission carrier sense result is OK, the above-mentioned message is transmitted or transferred. When the pre-transmission carrier sense result is NG, the radio signal from the radio repeater B (transmission slot 111) Is transmitted in a predetermined time range (fire transfer signal area, other signal area) previously distinguished according to the type of signal based on the frame number included in. If there is no confirmation response from the host device even if the above-mentioned message is retransmitted, the process is repeated until the confirmation response is received in the same manner as the sensor D.

  As described above, according to the present embodiment, when transmitting a fire signal, a status information signal, or the like as a radio signal, is the radio signal from the wireless repeater B received by performing carrier sense before transmission? When a wireless signal is received, based on the frame number included in the wireless signal, a predetermined time range (fire transfer signal area, fire notification signal area, Other signal areas are used for transmission. As a result, the wireless repeater B causes the fire receiver A to preferentially capture a highly urgent radio signal even if a highly urgent event detection and a low event detection occur from different sensors D almost simultaneously. Can do.

  If a confirmation response from the host device is not detected when a fire signal or status information signal is transmitted by radio signal, it is retransmitted in the next continuous reception slot according to the signal type. Therefore, the processing for radio signals with high urgency is not delayed.

  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, E external tester, F1-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;
Interposed between the detector and the fire receiver, a relay device among you relaying radio signals,
A repeater repeater that is interposed between the sensor and the repeater and relays at least a radio signal ;
The repeater and the repeater repeater have a continuous reception slot that activates a reception function for a predetermined time after the transmission period ends, and the continuous reception slot is distinguished in advance from the highest importance according to the type of signal. Multiple wireless signal areas are set up,
When transmitting the radio signal, the sensor performs carrier sense to determine whether the radio signal from the repeater repeater is received, and is included in the radio signal when the radio signal is received. Based on the frame number, after the repeater repeater has finished transmitting , transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot ,
The repeater repeater determines whether or not a wireless signal is received from the repeater by performing carrier sense at least when transferring a wireless signal from the sensor, and when a wireless signal is received Based on the frame number included in the radio signal, after the repeater has finished transmitting, transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot,
When the repeater receives a wireless signal from the sensor via the repeater repeater and transmits a wireless signal indicating the confirmation response to the repeater repeater, the repeater repeater completes transmission. Later, transmit in a predetermined time range distinguished to the corresponding radio signal area of the continuous reception slot,
The fire alarm system , wherein the continuous reception slot in the repeater repeater is configured to be able to receive a radio signal transmitted from the sensor and the repeater . 2. The fire alarm system according to claim 1, wherein when the sensor does not receive an acknowledgment from the repeater repeater when transmitting a radio signal, the sensor retransmits the radio signal. 3. The fire alarm system according to claim 1, wherein the repeater repeater retransmits the wireless signal when it does not receive the confirmation response from the repeater when the wireless signal is transferred. 4.

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