JP2012216098A - Fire alarm equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide fire alarm equipment in which a relay can reliably monitor all fire sensors even when a repeater relay is provided between the relay and the fire sensors since the relay and the fire sensors are away from each other.SOLUTION: A fire alarm equipment includes a wireless type relay B which activates a registration mode of a communication path when a registration switch is operated and a wireless type fire alarm sensor D which transmits a registration request signal of the communication path when the registration switch is operated. The wireless type relay B, upon recept of the registration request signal, gives identification information to the fire sensor D, and saves communication path information including information that the fire sensor D is a lower-level device under the relay B, and transmits a registration signal including information that the fire sensor D is the lower-level device to the fire sensor D, thereby causing the fire sensor D to save information that the relay B is an upper-level device above the fire sensor D.

Description

  The present invention relates to a fire detector that detects a fire and outputs a fire signal, a fire alarm facility equipped with a fire receiver that receives and notifies a fire signal, in particular, a fire alarm facility that wirelessly uses a fire detector, etc. It is about.

  In the conventional wireless sensing system, when the repeater control means of the repeater receives the registration request signal from the fire detector, the address included in the registration request signal is stored in the storage means and immediately after the next periodic request. It has a function as device side registration means for returning a registration permission signal including a waiting time until the signal transmission timing (that is, the head of the super frame) to the fire detector. As an example, the waiting time is represented by the number of remaining time slots in the superframe, which is calculated from the position in the superframe of the time slot in which the repeater returns a registration permission signal (for example, Patent Document 1).

JP 2008-004037 A (page 10, FIG. 1)

  In the conventional wireless detection system described above, since the route information of the monitoring target device such as the fire detector is not registered in the repeater, it can be handled only when the repeater includes all the fire detectors in the transmission range. There wasn't.

  The present invention has been made in order to solve the above-described problems. Even when a repeater repeater is provided between the repeater and the fire detector, the repeater can be used for all fire detection. The purpose is to obtain a fire alarm system that can reliably monitor the vessel.

  The fire alarm facility according to the present invention includes a first repeater that activates a communication path registration mode when a pre-registered switch is operated, and a communication path that is operated when a pre-registered switch is operated. A wireless fire detector for transmitting a registration request signal, and when the registration request signal is received, the first repeater gives identification information to the fire detector and is a subordinate device of the repeater. Communication path information including the above information is stored, and a registration signal including the fact that it is a lower device is transmitted to the fire detector to be stored as a higher device of the fire detector.

  According to the above configuration, the present invention can reliably monitor even when the first repeater cannot include all fire detectors in the transmission range.

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 fire detector 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 with respect to the fire detector and the communication message | telegram which a fire detector 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 fire detector detects a fire during the state collection process which concerns on 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 includes a fire receiver A, a wireless repeater B1 (first repeater) connected to the fire receiver A via a transmission line CL1, A wireless repeater B2 (first repeater) connected to the fire receiver A via a transmission line CL2, and wireless fire / fire detectors D11, D12 disposed on the ceiling of each room of the building to be monitored; D21, D22, D31, D32, D41, D42, D43, and a repeater repeater C1 (second repeater) that relays wireless signals interposed between the wireless repeater B1 and the fire detectors D21, D22 , Repeater repeaters C2 and C3 (second repeaters) that are interposed between the wireless repeater B1 and the fire detectors D31 and D32 and relay wireless signals.

  The external tester E shown in FIG. 1 performs a remote test using wireless signals for the wireless repeaters B1 and B2, and, as will be described later, indicates the state at the time of registration of the communication paths F1, F2, F3, and F4. It is a device used for confirmation.

  Thereafter, the wireless repeaters B1 and B2 are replaced with the wireless repeater B, the fire detectors D11, D12, D21, D22, D31, D32, D41, D42, and D43 are replaced with the fire detector D and the repeater repeater C2. , C3 may be collectively referred to as repeater repeater C.

  Here, each wireless repeater B and a set of fire detectors D and repeater repeaters C that perform wireless communication with the wireless repeater B are referred to as a group. That is, one group is formed for each wireless repeater B. In the example of FIG. 1, repeater repeaters C1, C2, C3 and fire detectors D11, D12, D21, D22, D31, D32 that perform wireless communication with the wireless repeater B1 and the wireless repeater B1 are provided. This is called group G1. Further, the wireless repeater B2 and the fire detectors 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 repeater B and the fire detectors D11 and D12, and the wireless repeater B and the repeater repeater C1 and the repeater repeater C1 and the fire. A communication path F2 is established between the sensors D21 and D22. A communication path F3 is established between the wireless repeater B and the repeater repeaters C2 and C3 and between the repeater repeater C3 and the fire detectors 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 fire detectors D41, D42, D43.

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

  FIG. 2 is a block diagram showing the main configuration of the wireless fire detector in the embodiment. The fire detector D includes a control circuit 1, a battery 2, a power supply circuit 3, a battery 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 power supply circuit 3. The power supply 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 battery voltage detection circuit 4 detects the DC voltage of the battery 2 applied to the power supply circuit 3 and outputs a battery voltage detection signal corresponding to the detection voltage to the control circuit 1. When the battery 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 battery voltage detection circuit 4 outputs it to the control circuit 1 to operate the indicator lamp circuit 8 and to display battery status information. A state signal including 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 repeater B from the wireless repeater B has registered the fire detector D is received by the transmission of the registration request signal, for example, communication with the wireless repeater B is performed. Establish a route.

(Repeater repeater C)
The repeater repeater C is interposed between the wireless repeater B and the fire detector D and relays a wireless signal. The repeater repeater C is provided when radio waves do not reach each other between the wireless repeater B and the fire detector 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 fire detector 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 power supply circuit 3, a battery 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-described fire detector D, the repeater relay 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 those of the fire detector D. It is. 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.

  As will be described later, 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 / receiving a wireless signal to / from the fire detector D and the repeater repeater C and transferring the wireless signal from the fire detector D or the repeater repeater C to the fire receiver A. doing. 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.

  As will be described later, when the registration switch signal is received when the registration switch (not shown) is turned on, the wireless repeater B is connected to the fire detector D or the repeater repeater C that has issued the registration request signal. A registration signal indicating that they are registered is transmitted to establish a communication path. The wireless repeater B changes the communication route to the fire detector 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-operated like the above-described fire detector D and repeater repeater C, but from the fire receiver A via a power line connecting the fire receiver A and the power line terminal 20a. DC power is supplied. In addition, the fire receiver A and the signal line terminal 20 b are connected by a signal line, and the wireless repeater B transmits and receives signals to and from the fire receiver A via the receiver I / F circuit 22. Although the operation contents of the control circuit 21 and the information stored in the storage element 21a are partially different, the other configurations are basically the same as those of the fire detector 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 fire detector D monitors the presence or absence of a fire in its own monitoring area. When the fire detector 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 via 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.

(Register communication path)
Here, the initial registration for establishing the communication path will be described with reference to FIG. 1. The state collection process and the fire notification process described above will be described after the registration.
The communication path is registered before the wireless repeater B, the repeater repeater C, and the wireless fire detector D are installed on the ceiling or wall of each room.

Here, an example is shown in which communication path information of repeater repeaters C1, C2, and C3 and fire detectors D11, D12, D21, D22, D31, and D32 is registered in the wireless repeater B1 that manages the group G1.
(1) First, the registration mode is activated by operating the registration switch 9 provided in the wireless repeater B1, and registration is started by operating the registration switch 9 of the fire detector D11. At this time, the fire detector D11 transmits a registration request signal to another device.
On the other hand, when the registration request signal is received, the wireless repeater B1 in the registration mode assigns an address to the fire detector D11 and includes a communication path including the lower device address of the wireless repeater B1. Information is stored in the storage element 21a of the wireless repeater B1.
The wireless repeater B1 transmits a registration signal including the group ID (G1) and the assigned address and the fire detector D11 as a lower device address of the wireless repeater B1 to the fire detector D11. The storage element 1a of the fire detector D11 is stored as the upper device address of the fire detector D21.
(2) By operating each registration switch 9 in the remaining fire detectors D12, D21, D22, D31, and D32, the storage element 21a of the wireless relay B1 has the group ID and each fire detector D. The assigned address and communication path information are stored.
The storage element 1a of each fire detector D stores the group ID of the wireless repeater B1, the assigned address, and the upper device address of each fire detector D.
(3) In the repeater repeaters C1, C2, and C3, registration is performed in the same procedure as each fire detector. The storage element 11a of each repeater repeater C stores the group ID of the wireless repeater B1, the assigned address, and the upper device address of each repeater repeater C.
Finally, the registration switch 9 of the wireless repeater B1 is operated to end the registration mode.
In this way, each fire detector D and each repeater repeater C store the address, group ID, and upper device address assigned to the wireless repeater B.
(4) The communication path is established between the wireless repeater B1 and the fire detectors D11, D12, D21, D22, D31, D32, and the wireless repeater B1 and the repeater repeaters C1, C2 , C3 is established with the communication path.

Next, a communication path is established between the fire detectors D21 and D22 and the repeater relay C1, and a communication path is established between the fire detectors D31 and D32 and the repeater relays C2 and C3. As described above, the route change registration to the fire detector D via the repeater repeater C is performed.
(1) First, the registration mode is activated by operating the registration switch 9 of the repeater repeater C1.
Next, the registration is started by operating the registration switch of the fire detector D21 via the repeater repeater C1. At this time, a registration request signal is transmitted from the fire detector D21 to another device.
(2) When the repeater repeater C1 in the registration mode receives the registration request signal, the repeater repeater C1 extracts the address of the fire detector D21 when it determines that the group ID matches its own group ID. A lower device address including that D21 is a lower device of the repeater repeater C1 is stored in its own storage element 11a.
The repeater repeater C1 transmits a route change signal including its own address to the fire detector D21, and includes a route including its own address, the address of the fire detector D21, and the higher model of the repeater repeater C1. The change signal is transmitted to the wireless repeater B1.
(3) On the other hand, when the fire detector D21 receives the path change signal from the repeater repeater C1, the fire detector D21 sets the upper device address including that the wireless repeater stored in the storage element 1a is the upper device. Invalidate and store a new higher device address including that the repeater repeater C1 is a higher device in the storage element 1a.
(4) When the wireless repeater B1 receives a route change signal from the repeater repeater C1, the communication route information set with the fire detector D21 is newly transmitted via the repeater repeater C1. The communication path information set with the fire detector 21 is changed to be stored in its own storage element 21a.
(5) In the remaining fire detector D22, the communication path information is changed in the same procedure as the fire detector D21.
Finally, the registration switch 9 of the repeater repeater C1 is operated to end the registration mode.
(6) When changing the communication path so that the fire detectors D31 and D32 pass through the repeater repeaters C2 and C3 and the wireless repeater B1, the fire detectors D31 and D32 are provided in the same manner as described above. Each registration switch 9 is sequentially operated to transmit a registration request signal to another device.
(7) The storage element 11a of the repeater C3 that has received the registration request signal stores the addresses of the fire detectors D31 and D32 and the lower device address including that the fire detectors D31 and D32 are lower devices. In the storage elements 1a of the devices D31 and D32, the stored upper device address of the wireless repeater B1 is invalidated, and the upper device address of the repeater relay C3 is stored.
(8) Next, path change registration is performed from the repeater repeater C3 to the repeater repeater C2.
The registration switch 9 of the repeater repeater C2 is operated to start the registration mode, and the registration switch 9 of the repeater C3 is operated to start registration. At this time, the repeater repeater C2 extracts the address of the repeater repeater C3 and the addresses of the fire detectors D31 and D32 from the registration request signal, and stores the address of the repeater repeater C3 as the lower device address in the storage element 11a. .
The repeater repeater C2 transmits a path change signal to the repeater repeater C3, and causes the storage element 11a of the repeater repeater C3 to store its own address as an upper device address. Then, the repeater repeater C2 transmits a path change signal to the wireless repeater B1 which is a host device, and the communication route information stored in the storage element 21a of the wireless repeater B1 is used as the repeater repeaters C2, C3. And the new communication path information in which each address of the fire detectors D31 and D32 is associated and stored.
Finally, the registration switch 9 of the repeater repeater C2 is operated to end the registration mode.

  As described above, in the group G1, the communication path F1 is established between the wireless relay B1 and the fire detectors D11 and D12, and the wireless relay B1 and the fire detectors D11 and D12 via the repeater relay C1. A communication path F2 is established between the wireless relay B1 and the fire detectors D31 and D32 via the repeater repeaters C2 and C3.

The storage element 21a of the wireless repeater B stores the communication path information in each of the communication paths F1, F2, and F3. Here, only the communication path information of the communication circuit F3 is exemplified below.
The communication route in the communication route F3 is one among the wireless repeater B1 (address B1), the repeater repeater C1 (address C1), the repeater repeater C2 (address C2), and the fire detector D31 (address 31). And a second route between the wireless repeater B1, the repeater repeater C1, the repeater repeater C2, and the fire detector D32 (address 32).
Therefore, the memory element 21a of the wireless repeater B has communication path information (corresponding to each address of the wireless repeater B1, the repeater repeater C1, the repeater repeater C2, and the fire detector D31 in the first route) B1-C1-C2-31), communication route information (B1-C1-) combining the addresses of the wireless repeater B1, the repeater repeater C1, the repeater repeater C2, and the fire detector D32 in the second route. C2-32) is stored.

  In the group G2, a communication path F4 is established between the wireless repeater B2 and the fire detectors D41, D42, and D43 by the same procedure as the communication path F1 of the group G1.

  After establishing the communication path, place each device on the ceiling for each group G1, G2, and connect the wireless repeaters B1, B2 to the fire receiver A via the transmission lines CL1, CL2 to check the radio wave conditions To do. This confirms the radio wave condition by transmitting and receiving radio waves among the wireless repeater B, the repeater repeater C, and the fire detector D for each of the groups G1 and G2. Whether or not radio waves are normally transmitted and received is determined from the lighting state of the LEDs provided in the wireless repeater B, repeater repeater C, and fire detector D, for example, blinking green when normal, and orange when abnormal.

  For example, when the radio wave of the fire detector D43 is abnormal from the lighting state, the repeater repeater C is added between the wireless repeater B2 and the fire detector D43. Note that the extension is performed in the same procedure as the registration of the repeater repeater C1 in the communication path F2.

In this case, the address of the added repeater repeater C is added to the storage element 21a of the wireless repeater B2 with respect to the stored communication path information between the wireless repeater B2 and the fire detector D43. In addition, the information is changed to new communication path information among the wireless repeater B2, the repeater C, and the fire detector D43 and stored. Further, the group ID (G2) of the wireless repeater B2 is stored in the storage element 1a of the fire detector D43, and the upper device address of the repeater repeater C is used instead of the upper device address of the wireless repeater B. Is saved. The storage element 11a of the repeater repeater C stores the group ID (G2) of the wireless repeater B2, the device address, and the lower device address of the fire detector D43.
Thereby, a new communication path (for example, F5) via the repeater repeater C is established in the wireless repeater B2 and the fire detector D43.

  In addition, when a new fire detector D is required in the monitoring area of the group G2, an additional fire detector D43, for example, D44, is added to the storage element 21a of the wireless repeater B2 by the above-described operation. Is stored in the storage element 1a of the fire detector D, and the group ID (G2) and the upper device address of the wireless repeater B2 are stored. As a result, a new communication path is established between the wireless repeater B2 and the fire detector D43.

(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) Status collection process In the status collection process, the wireless relay B collects status information (for example, battery status) of devices (repeater repeater C, fire detector D) that transmit and receive wireless signals with itself. It is processing to do. 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 fire detector D, which is the end 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 the state collection process between the fire detectors D11 and D12 (communication path F1), and when this is completed, the wireless repeater B1 becomes the repeater repeater. The state collection processing is performed between C1 and the fire detectors D21 and D22 that perform transmission and reception with this (communication path F2). When this is completed, the wireless relay B1 performs transmission and reception with the repeater relays C2 and C3. A state collection process is performed between the fire detectors 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 fire detector 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: fire detector D, repeater repeater C (only when present), 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 fire detector D basically perform intermittent reception for 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 fire detector 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 system 100 according to the embodiment, the communication message to be used depends on the type of transmission / reception processing ((1) state collection processing or (2) fire notification processing), the type of the transmission source device, and the type of the reception source device. Is stipulated. 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 fire detector D) to the wireless repeater B. Or it is comprised from the transmission slot 111 which transmits a signal to the repeater repeater C, and the continuous reception slot 112 which receives the signal from another apparatus.

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 frame 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, the fire notification signal area 114 is an area for receiving a fire notification signal transmitted from the fire detector D, etc. The signal area 115 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 fire sensor and a communication message transmitted by the fire sensor in the state collection process of the embodiment. 6A shows a communication message transmitted by the wireless repeater B or the repeater repeater C to the fire detector D, and FIG. 6B shows a communication message transmitted by the fire detector D. ing. FIG. 6B shows an example of transmission / reception operations of a plurality of fire 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 fire detector D on the receiving side performs intermittent reception at every intermittent reception interval TD (7 seconds in the present embodiment), and the timing of intermittent reception of each fire detector D may be different. Therefore, in order for each fire detector D to receive a radio signal in intermittent reception, the timing of intermittent reception of each fire detector D needs to be included in the transmission slot of the signal transmission source.
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 less than or equal to the intermittent reception interval TD (7 seconds) of the fire detector D, and the continuous reception slot 122. 7 seconds after (section T1 in FIG. 6) is included in the transmission slot 125. In this way, all the fire detectors D can receive the radio signal transmitted in any of the transmission slots 121, 123, and 125. That is, for example, even if the intermittent reception timing of a certain fire detector D is included in the continuous reception slot 122, the fire detector D receives the radio signal transmitted in the transmission slot 125 at the next intermittent reception timing. Can be received.

  As shown in FIG. 6B, when the fire detector D receives a wireless signal from the wireless repeater B or the repeater repeater C, the fire detector 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 fire detector 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 fire detector return slots 129 divided into areas for receiving radio signals from the respective fire detectors D. The fire detector return slot 129 is divided into areas corresponding to the number of fire detectors D that can be connected to the group (30 areas in the present embodiment).
When each fire detector D receives any of the basic frames 101 transmitted in the transmission slots 121, 123, and 125, the fire detector D, based on the frame number included in the received basic frame 101, transmits the transmission slot (transmission slot 121, The process waits until any one of 123 and 125 is completed. And based on the information regarding the timing of each area of the fire detector return slot 129 stored in the storage element 1a of each fire detector D in advance, the fire detector D, among the areas of the fire detector return slot 129, A radio signal is transmitted to an area (time zone) corresponding to the device number assigned to itself. For example, the fire detector D having the device number 5 transmits a radio signal to the fifth area of the fire detector return slot 129. In this way, by setting a reception time zone (a transmission time zone of the fire detector D) by the fire detector D, a signal is simultaneously transmitted by the plurality of fire detectors D, thereby destroying the telegram. This can be suppressed. Further, since radio signals from a plurality of fire detectors D can be received in one transmission slot, the time required for reception can be shortened.

Next, an operation example of the fire detector D having different intermittent reception timing will be described with reference to FIG. First, the fire detector D having the equipment number 01 receives the 45th basic frame 101 of the transmission slot 123 by intermittent reception, and sends the shortened frame 102 as a response thereto to the fire detector return slot of the continuous reception slot 124. 129 is transmitted to the first area. Also, the fire detector D having the device number 02 receives the 48th basic frame 101 of the transmission slot 121 by intermittent reception, and sends the shortened frame 102 as a response thereto to the fire detector return slot of the continuous reception slot 122. It transmits to the second area of 129. The fire detector D having the 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 fire detector return slot 129 of the continuous reception slot 126. To the third area.
In this way, each fire detector D shortens in the 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. Frame 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 frame 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 fire detector information 201 and repeater repeater information 202. The fire detector information 201 includes data areas corresponding to the number of fire detectors D (30 in the present 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 path of the fire detectors D11 and D12) and the communication path F3 (the repeater relay C2, (C3, communication path of fire detectors D31 and 32) 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 fire detectors D11 and D12, the wireless repeater B1 sends the status request signal to the block communication 120 (FIG. 6A). To send.
On the other hand, the fire detectors D11 and D12 perform intermittent reception at the intermittent reception interval TD, and receive the status request signal transmitted by the wireless repeater B1 in any of the transmission slots 121, 123, and 125 of the block communication 120. To do. In this example, it is assumed that the fire detector D12 receives the status request signal transmitted in the transmission slot 123, and the fire sensor D11 receives the status request signal transmitted in the transmission slot 125.

(S302) Upon receiving the state request signal, the fire detector D12 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 number of the fire detector return slot 129 of the continuous reception slot 124 of the wireless repeater B1 (FIG. 6).
(S303) Upon receiving the state request signal, the fire detector D11 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 own number of the fire detector 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 fire detector D11 and the fire detector 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 fire detectors D31 and D32, the repeater repeater C3 sends a status request signal to the transmission slots 121, 123, and 125 of the block communication 120 (FIG. 6A). )

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 fire detectors 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 fire detector D32 receives the status request signal transmitted in the transmission slot 123, and the fire sensor D31 receives the status request signal transmitted in the transmission slot 125.

(S307) Upon receiving the state request signal, the fire detector 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 number of the fire detector return slot 129 of the continuous reception slot 124 of the wireless repeater B1 (FIG. 6).
(S308) Upon receiving the state request signal, the fire detector D31 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 own number of the fire detector 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 (fire detectors 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 fire detectors D31 and D32 received in step S306 in the fire detector information 201 and the state information of the repeater repeater C3 itself. It is included in the repeater repeater information 202. That is, the state information signal transmitted from the repeater repeater C3 includes the state information of the fire detectors 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 transmits the status information signal through the transmission slot 131 (FIG. 7) of the communication slot 130. The fire detector information 201 of the continuous transmission frame 103 transmitted at this time includes state information of the fire detectors 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) Upon receiving the status information signal transmitted by the repeater repeater C2, the wireless repeater B1 transmits a reception response signal, which is a signal indicating that the signal has been received, to the transmission source device.
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.

Note that the block communication 120 does not necessarily execute all the slots (transmission slot 121, continuous reception slot 122, transmission slot 123, continuous reception slot 124, transmission slot 125, and continuous reception slot 126). The transmission of the signal can be stopped when the state information signals from all the fire detectors D belonging to are received. For example, when the status information signals from all the fire detectors 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 is transmitted from the transmission slot 123 onward. Do not perform the 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.
In addition, when the status information signal cannot be received from the fire detector D in any of the continuous reception slots 122, 124, and 126, the repeater repeater C or the wireless repeater B is assigned to the fire detector D. A signal indicating “no response” is input to the area of the fire detector return slot 129, and this is transmitted as a status information signal to a higher-level device.

(2) Fire Notification Processing FIG. 9 is a diagram for explaining fire notification processing. 9A shows a communication path F1 (communication path of fire detectors D11 and D12) among the communication paths for performing wireless communication with the wireless repeater B1 shown in FIG. 1, and FIG. Shows a communication path F3 (communication path of repeater repeaters C2, C3, fire detectors 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 fire detector D12.
(S401) When the fire detector D12 detects a fire occurrence, the fire detector D12 transmits a fire signal including fire detection information to the upper device address stored in the storage element by the transmission slot 111 (FIG. 5) of the communication slot 110. . In this example, since the host device of the fire detector D12 is the wireless repeater B1, the fire detector D12 transmits a fire signal to the wireless repeater B1. After transmitting the fire signal through the transmission slot 111, the fire detector 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 fire detector D12 in step S401.

(S402) Upon receiving the fire signal from the fire detector D12, the wireless repeater B1 sends a reception response signal, which is a signal indicating that the signal has been received, to the fire detector D12 that is the transmission source device. Send.
The fire detector 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, when the reception response signal transmitted from the wireless repeater B1 cannot be received in the continuous reception slot 112 in step S401, the fire detector D12 has detected some abnormality such as a communication abnormality. And retransmit the fire signal.

FIG. 9B shows an example in which a fire occurs in the monitoring area of the fire detector D31.
(S501) When the fire detector D31 detects the occurrence of a fire, it transmits a fire signal to the upper device address stored in the storage element by the transmission slot 111 (FIG. 5) of the communication slot 110. In this example, since the host device of the fire detector D31 is the repeater repeater C3, the fire detector D31 transmits a fire signal to the repeater repeater C3. After transmitting the fire signal through the transmission slot 111, the fire detector 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 fire detector D31 in step S501.

(S502) When the repeater repeater C3 receives the fire signal from the fire detector D31, the repeater repeater C3 transmits a fire transfer signal to the upper device address (here, the address of the repeater repeater C2) stored in the storage element. 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 fire detector D31 in the continuous reception slot 112 (see the broken line in S501), and the fire detector D31 has transmitted by receiving the fire transfer signal. It recognizes that the fire signal has been 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 transmission slot 111 (FIG. 5) sends the fire transfer signal to the upper device address (in this case, the wireless device address) stored in the storage element. To the address of the repeater B1. 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) Upon receiving the fire transfer signal from the repeater repeater C2, the wireless repeater B1 transmits a reception response signal to the repeater repeater C2 that is the transmission source of the fire transfer signal.
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.

  In addition, even if it is the structure which interposes the repeater repeater C between the wireless repeater B and the fire detector D like the example of FIG. 9 (B), depending on arrangement | positioning and radio wave condition of each apparatus, In some cases, the wireless repeater B can directly receive the fire signal transmitted from the fire detector D. In such a case, the wireless repeater B recognizes that a fire has occurred due to the fire signal transmitted from the fire detector D even if the fire transfer signal from the repeater repeater C has not arrived. Send to fire receiver A. For this reason, a fire signal can be transmitted from the fire detector 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 fire detector 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 the fire signal from the fire detector 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 fire 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 fire detector detects a fire during the state collection processing according to the embodiment.
FIG. 10 shows a situation in which the fire 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 fire detector D32 that has detected a fire performs pre-transmission carrier sense before transmitting a fire signal. In this carrier sense before transmission, it is assumed that the fire detector D32 has received the radio signal transmitted by the repeater repeater C3 in step S309. Here, since it is the continuous transmission frame 103 that is transmitted in step S309, the fire detector D32 cannot transmit the fire signal because it receives the continuous transmission frame 103 by the carrier sense before transmission. Then, the fire detector D32 waits until the transmission slot 131 ends 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 fire detector D32 transmits a fire signal to the fire notification signal area 134 of the continuous reception slot 132. In this way, the fire detector 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, according to the present embodiment, the wireless repeater B, the repeater repeater C, and the fire / fire detector D are collected before installation on the ceiling of each room, and the wireless repeater B and the fire / fire are collected. Since wireless communication is performed between the sensor D, between the wireless repeater B and the repeater relay C, and between the repeater repeater C and the fire / fire detector D, the communication path is established. Even if the relay repeater B cannot include all fire detectors in the transmission range, it can be reliably monitored.

  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 Fire detector 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 Fire detector information, 202 repeater repeater information, A fire receiver, B wireless repeater, C repeater repeater, D fire detector, F1 communication path, F2 communication path, F3 communication path, F4 communication path.

Claims (6)

A first repeater that activates a registration mode of a communication path when a registration switch provided in advance is operated;
A wireless fire detector that transmits a registration request signal of a communication path when a registration switch provided in advance is operated,
When the registration request signal is received, the first repeater adds identification information to the fire detector, stores communication path information including a subordinate device of the repeater, and A fire alarm system characterized in that a registration signal including being a device is transmitted to the fire detector and stored as a host device of the fire detector. Comprising at least one wireless second repeater that transmits a registration request signal of a communication path when a registration switch provided in advance is operated;
When the first repeater receives a registration request signal, the first repeater gives identification information to the second repeater, stores communication path information including that it is a subordinate device of the repeater, and 2. The fire alarm system according to claim 1, wherein a registration signal including being a lower device is transmitted to the second repeater and stored as an upper device of the second repeater. When the registration request signal from the fire detector is received, the second repeater extracts the identification information of the fire detector from the registration request signal, and includes that the fire detector is a subordinate device. The communication path information is stored, and a path change signal including its own identification information is transmitted to the fire sensor, and the self identification information, the identification information of the fire sensor, and the self are higher rank devices than the fire sensor. A route change signal including that is sent to the first repeater,
When the fire detector receives a route change signal from the second repeater, the fire detector invalidates the communication route information stored with the first repeater, and the second repeater Save new communication path information including that it is a device,
When the first repeater receives a path change signal from the second repeater, the first repeater sets the communication path information set between the first repeater and the fire sensor via the second repeater. The fire alarm equipment according to claim 2, wherein the information is changed to communication path information. When the second repeater receives a registration request signal from another second repeater, it extracts the identification information of the other second repeater and the fire detector from the registration request signal, The communication route information including that the other second repeater is a subordinate device is stored, a route change signal is transmitted to the other second repeater, and a route change signal is transmitted to the first repeater. ,
The other second repeater extracts the address of the second repeater from the route change signal when the route change signal is received from the second repeater, and the second repeater is a higher-level device. Communication path information including
When the path change signal is received from the second repeater, the one repeater invalidates the previously stored communication path information, and from the path change signal, the second repeater and other second relays The fire alarm system according to claim 3, wherein addresses of the fire detector and the fire detector are extracted and stored as new communication path information. Each of the fire detectors transmits a registration request signal each time the registration switch is turned on,
Each time the first repeater receives a registration request signal, it gives identification information to each fire detector, stores communication path information including being a subordinate device of the repeater, and The fire alarm system according to any one of claims 1 to 4, wherein a registration signal including being a subordinate device is transmitted to each fire detector and stored as a superordinate device of each fire detector.   The fire alarm system according to any one of claims 1 to 5, wherein the identification information of the first repeater includes a group ID.

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