JP5336320B2 - Wireless disaster prevention system - Google Patents

Description

The present invention relates to a wireless disaster prevention system, a sensor node, and a radio wave relay node that transmit a radio message transmitted wirelessly from a sensor node such as a wireless sensor to a receiver.

  Conventionally, in a wireless disaster prevention monitoring system that monitors fires, when multiple wireless fire detectors are installed as sensor nodes in a warning area such as each floor of a building and a fire is detected by the wireless sensor Then, a message indicating the fire alarm is transmitted wirelessly to a wireless reception repeater as a wireless disaster prevention node installed on a floor basis. In addition, a wireless repeater that is a wireless relay node is installed on the way to relay messages from the wireless sensor.

  The radio reception repeater is connected to the sensor line from the receiver. When a telegram indicating a fire alarm is received, a fire alarm is generated by flowing an alarm current to the sensor line when the relay contact or switching element is turned on. Send an information signal to the receiver. Upon receiving this fire alarm signal, the receiver issues a fire alarm by means such as sound.

  According to such a wireless disaster prevention system, a part of a sensor line generally laid on the ceiling or the like can be eliminated, wiring work is simplified, and the installation location of the sensor is also restricted by wiring. You can decide without.

  In the case of a wireless disaster prevention system, a periodic notification is used to monitor that the wireless sensor and radio wave repeater are operating normally. Send messages regularly.

A periodic notification message is sent once every 24 hours at a set time, and if the receiving side does not receive a periodic notification message once within a predetermined time, the sender is not operating normally. It is determined that this is the case, and the receiver is notified of the occurrence of a failure and alerted.

JP-A-5-274580 JP 2001-290209 A

  However, in such a periodic report provided in the conventional wireless disaster prevention system, the operation of the device and the communication path are confirmed by transmitting a periodic report message once a day at a predetermined time. However, depending on the time of day, regular notifications may not be performed normally.

  For example, the temperature and brightness of the installation location of the equipment, the presence or absence of people staying, changes in the opening and closing of the fire door, etc. may affect the operation of the equipment and the communication path, and there is a possibility that regular notifications can not be performed normally. is there. For this reason, when sending a periodic report at a fixed time as in the conventional periodic report, it will not be possible to find an abnormal condition that occurs depending on the time zone. If an emergency such as a fire occurs during the time when the condition occurs, the system will fail.

  In order to solve such a problem, for example, periodic notifications may be made every hour. However, periodic notification messages are frequently transmitted from a plurality of wireless sensors and radio wave repeaters, and a wireless reception repeater. The processing load of the message is increased, the probability of message collision increases, and there is a risk that the transmission and reception of messages indicating fire alarms may be hindered. In addition, battery consumption is accelerated.

The present invention aims at providing a wireless disaster prevention system that without improving the reliability of communication by performing periodic report on each of the 24-hour time to increase the frequency of the periodic report.

(system)
The present invention comprises a plurality of sensor nodes, radio wave relay nodes, radio disaster prevention nodes, and receivers. A radio message transmitted from a sensor node via a radio message transmitted from a sensor node or a radio relay node is transmitted by the radio disaster prevention node. In the wireless disaster prevention system that receives and processes, and transmits the processing result to the receiver connected by the signal line,
To sensor node and radio relay node,
The absolute value of the difference from 24 hours is 1 hour, a prime time given as a prime number of 5 or more, or 1 hour or a predetermined periodic report transmission time that is less than 1 hour around the prime time, A periodic report transmission timer that outputs every periodic report transmission time;
A periodic report transmitter that transmits a periodic report message including a sender ID based on the output of the periodic report transmission timer;
Provided,
Wireless disaster prevention node
Provided corresponding to the source ID, it sets a predetermined periodic report reception time to be more than an integer multiple of the periodic report transmission time is reset and started whenever receiving the periodic notification message, when it reaches the regular notification reception time A periodic report reception timer to output to
When periodic report reception timer has outputted, and periodic report receiving unit for warning a fault notification to the receiver determines that periodic report abnormality,
Is provided.

In addition, the present invention includes a plurality of sensor nodes, a wireless disaster prevention node, and a receiver that receives and processes a message transmitted from the sensor node by the wireless disaster prevention node, and a processing result connected by a signal line. In the wireless disaster prevention system to send to
In the sensor node,
The absolute value of the difference between the inter-hour 24, 1 hour, several hours element given by 5 or more prime, or sets a predetermined periodic report transmission time of 1 hour less than the time before and after about a 1 hour or hours-containing A periodic report transmission timer that outputs every periodic report transmission time;
A periodic report transmitter that transmits a periodic report message including a sender ID based on the output of the periodic report transmission timer;
Provided,
Wireless disaster prevention node
Provided corresponding to the source ID, it sets a predetermined periodic report reception time to be more than an integer multiple of the periodic report transmission time is reset and started whenever receiving the periodic notification message, when it reaches the regular notification reception time A periodic report reception timer to output to
When periodic report reception timer has outputted, and periodic report receiving unit for warning a fault notification to the receiver is determined that periodic report abnormality,
Is provided.

  Here, the regular report transmission timer sets 23 hours, 19 hours, or 17 hours as the regular report transmission time.

  Further, the regular report transmission timer may set 25 hours, 29 hours, or 31 hours as the regular report transmission time.

  According to the present invention, the absolute value of the difference between the regular notification message and 24 hours is 1 hour, a prime time given as a prime number of 5 or more, or 1 hour or a time less than 1 hour before and after the prime number. , 5 and 7 corresponding to, for example, 23 hours, 19 hours or 17 hours, a periodic notification transmission timer, for example, a 23-hour timer transmits a periodic notification message every 23 hours while delaying by 1 hour per day. A periodic notification message is transmitted, and a periodic notification message is transmitted at the timing of every hour in 24 hours in 24 days.

  For this reason, when an abnormality occurs in the operation of the device or the communication environment due to an environmental change that depends on the time of the day, the abnormality can be reliably detected. Appropriate action can be taken by recognizing abnormalities depending on daily changes that cannot be received, that is, communication cannot be performed normally.

In addition, by setting the periodic report transmission timer so that the difference from 24 hours does not become too large, the periodic report message can be sent in 1-hour increments in 24 hours without increasing the frequency of regular report messages. Can be sent.

Explanatory drawing which showed embodiment of the wireless disaster prevention system by this invention The block diagram which showed the detail of the wireless sensor and radio wave repeater of FIG. The block diagram which showed the detail of the repeater for radio | wireless reception of FIG. 1, and a P-type receiver Explanatory drawing which showed the frequency | count of transmission and time by the 23-hour timer used as a periodic report transmission timer in this embodiment in a list. Explanatory diagram showing a list of the number of transmissions and time by a 19-hour timer used as a periodic notification transmission timer in this embodiment Explanatory drawing which showed the number of times of transmission and time by a 17 hour timer used as a periodic report transmission timer in this embodiment in a list Explanatory drawing which showed the frequency | count of transmission and time by the 25-hour timer used as a regular notification transmission timer in this embodiment by the list. Explanatory diagram showing a list of the number of times of transmission and time by a 29-hour timer used as a periodic notification transmission timer in this embodiment Explanatory diagram showing periodic report reception timer information managed by the wireless reception repeater of FIG. Explanatory drawing which showed the message format of the radio signal used with the radio disaster prevention system of FIG. The flowchart which showed the sensor process by the wireless sensor of FIG. The flowchart which showed the radio wave relay process by the radio wave repeater of FIG. The flowchart which showed the relay process for radio | wireless reception by the radio | wireless receiver repeater of FIG.

  FIG. 1 is an explanatory view showing an embodiment of a wireless disaster prevention system according to the present invention. In FIG. 1, radio reception repeaters 12-1 to 12-3 functioning as disaster prevention radio nodes are installed on the first floor of a building 11 to be monitored, and are drawn out from the P-type receiver 10 by floor as a fire receiver. Sensor lines 18-1 to 18-3.

  Wireless sensors 16-11 to 16-14, 16-21 to 16-24, and 16-31 to 16-34 functioning as sensor nodes are installed on the floors 1F to 3F. Further, in the present embodiment, the radio wave repeaters 14-1 to 12-3 are prevented from being lost due to the attenuation of radio waves from the radio sensors that are far away from the radio wave repeaters 12-1 to 12-3. 1-14-3 are installed.

  A unique node ID known as a device ID is registered in advance in each of the wireless sensors 16-11 to 16-34 and the radio wave repeaters 14-1 to 14-3. The wireless reception repeaters 12-1 to 12-3, the radio wave repeaters 14-1 to 14-3, and the wireless sensors 16-11 to 16-34 have a wireless network built by floor. For each floor, a network address (hereinafter simply referred to as “address”) is set.

  Here, 1F will be described as an example. The wireless sensors 16-11 to 16-14 determine a fire when the smoke concentration or temperature due to a fire exceeds a predetermined threshold, and wirelessly transmit a telegram signal (hereinafter simply referred to as “telegram”) indicating a fire alarm. Send.

  In each of the radio wave repeater 14-1 and the radio reception repeater 12-1, a node ID for specifying a transmission source as a child node that receives a message based on the parent-child relationship is registered in advance. That is, node IDs of the wireless sensors 16-13 and 16-14 and the radio relay 14-1 that are child nodes are registered in advance in the wireless reception repeater 12-1. Also, node IDs of the wireless sensors 16-11 and 16-12 that are child nodes are registered in advance in the radio wave repeater 14-1.

  The same applies to the 2F and 3F wireless reception repeaters 12-2 and 12-3 and the radio wave repeaters 14-2 and 14-3, and the wireless reception repeater 12-2 includes the wireless sensor 16-. 23, 16-24 and the node IDs of the radio repeaters 14-2 are registered in advance, and the radio repeater 14-2 registers the node IDs of the wireless sensors 16-21 and 16-22, and the radio reception repeaters 12-3 registers the node IDs of the wireless sensors 16-33 and 16-34 and the radio relay 14-3, and the radio relay 14-3 stores the node IDs of the wireless sensors 16-31 and 16-32. Is registered.

  When a telegram is received by registering the node ID for the radio reception repeater 12-1 and the radio repeater 14-1, the transmission source ID included in the telegram is compared with the node ID registered in advance. When the two match, the message is processed as a valid message.

Furthermore, in the present embodiment, the wireless reception repeater 12-1 receives directly from the wireless sensors 16-11 and 16-12 that are not in a parent-child relationship without going through the radio wave repeater 14-1. for message, to enable the processing of a valid message, the radio relay 14-1 to the wireless reception relay 12-1, additionally registers transfer the node ID registered, whereby, for radio reception Even when a message from the wireless sensors 16-11 and 16-12 not assigned as a child node is directly received by the repeater 12-1, it is possible to determine the match with the additionally registered node ID and It can be processed as a message.

  When the radio wave repeater 14-1 receives a message from the wireless sensors 16-11 and 16-12, it compares the message transmission source ID with the registered node ID, and the two match. Is relayed to the wireless reception repeater 12-1 as an effective message.

  When the wireless reception repeater 12-1 receives a message from the wireless sensors 16-13 and 16-14 assigned as the child nodes, the wireless transmission repeater 12-1 determines the transmission source ID of the message and the registered node ID. When the two match, the received message is processed as a valid message, and the processing result is transmitted to the P-type receiver 10.

  When the received electronic message is a message indicating a fire alarm from the wireless sensor, the wireless reception repeater 12-1 issues a notification as a contact output to the sensor line 18-1 to the P-type receiver 10. A fire alarm signal is sent by passing an electric current.

  The wireless reception repeater 12-1 is registered in advance with the transmission source ID included in the electronic message even when the electronic message is received from the wireless sensors 16-11 and 16-12 via the radio wave repeater 14-1. The received message is received as a valid message by matching the received node ID, and the reception result is transmitted to the P-type receiver 10.

  Further, the wireless reception repeater 12-1 is additionally registered with the transmission source ID of the received message even when the message is directly received from the wireless sensors 16-11 and 16-12 which are not assigned. Compared with the node ID, if both match, the message is processed as a valid message, and the processing result is transmitted to the P-type receiver 10.

  In this embodiment, it is monitored that the wireless sensors 16-11 to 16-14 and the radio wave repeater 14-1 are operating normally, i.e., no carry-out or battery exhaustion has occurred. Therefore, a periodic notification message is periodically transmitted. The periodic report message is transmitted every time the regular report transmission time T0 of the periodic report transmission timer provided in the wireless sensors 16-11 to 16-14 and the radio wave repeater 14-1 is reached.

In the present embodiment, the periodic report transmission time T0 of the periodic report transmission timer is the absolute value of the difference from 24 hours,
(A) 1 hour,
(B) Prime time given by a prime number of 5 or more, or (C) 1 hour or less than 1 hour before and after the prime time,
The predetermined time which becomes either of these is set.

Here, for example, in case (A),
T = (24 hours) ± (1 hour)
Thus, a 23-hour timer or a 25-hour timer is used.

In case (B),
T = (24 hours) ± (prime time of 5 or more)
Assuming that the prime time is 5 hours, 7 hours, and 11 hours, if it is less than 24 hours, a 19-hour timer or a 17-hour timer is used, and if it exceeds 24 hours, a 29-hour timer or a 31-hour timer is used.

  Case (C) is a time other than an integer, and for example, a 23.5 hour timer or a 24.5 hour timer is used.

  In response to the transmission of the periodic notification message from the wireless sensors 16-11 to 16-14 and the radio wave repeater 14-1, the wireless reception repeater 12-1 matches the node ID registered with the transmission source ID of the message. When the message is received as a valid message, the periodic report reception timer provided for each registered node ID is reset and started.

  For example, the periodic report reception timer is set to 48 hours, and when 48 hours have passed without receiving the periodic report message, a timer output is generated. When the periodic report reception timer functioning as a 48-hour timer expires, it is determined that the periodic report is not operating normally, and the failure occurrence is notified to the P-type receiver 10.

  This failure occurrence notification is made by notifying the occurrence of failure due to a periodic report abnormality by, for example, creating a pseudo disconnection state by disconnecting the terminal resistance connected to the sensor line 18-1 from the P-type receiver 10. A fault alarm is output.

FIG. 2 is a block diagram showing the details of the 1F wireless sensor 16-11 and the radio repeater 14-1 provided in the embodiment of FIG. 1, and FIG. 3 is a block diagram showing the details of the embodiment of FIG. 2 is a block diagram showing the details of the 1F wireless reception repeater 12-1 and the P-type receiver 10 provided in FIG.

  In FIG. 2, the wireless sensor 16-11 functioning as a sensor node includes a processor 20, a wireless communication unit 22, an antenna 24, a sensor unit 26, an operation unit 28 using a dip switch, and a battery 30. The sensor unit 26 is a temperature detection unit using a photoelectric smoke sensing unit or a thermistor.

  The wireless communication unit 22 is provided with a transmission circuit, and in the case of Japan, for example, performs wireless communication according to the standard of a specific low-power wireless station in the 400 MHz band. Note that the wireless sensor 16 is not provided with a receiving circuit because it only transmits a telegram message to the receiver side.

  Further, the channel frequency of the wireless communication unit 22 uses any one of four channel frequencies f1 to f4 that can be used in the specific low power wireless station standard of the 400 MHz band. The channel frequencies may be the same on each floor in FIG. 1, or different channel frequencies may be used on adjacent floors to avoid interference.

  The processor 20 is provided with a sensor processing unit 58, a regular report transmission unit 60, and a regular report transmission timer 62 as functions realized by executing the program.

  The sensor processing unit 58 compares, for example, a smoke concentration detection signal output from the sensor unit 26 with a predetermined threshold value, determines that a fire has occurred when the threshold value is exceeded, and outputs a message indicating a fire alarm from the wireless communication unit 22. Wirelessly transmitted from the antenna 24.

  Further, when the registration mode is set by the dip switch or the like of the operation unit 28, the sensor processing unit 58 transmits an activation message or a test message in which a node ID known as a device ID is set as a transmission source ID, and the radio wave repeater 14-1 To register the node ID.

  The periodic notification timer 62 transmits a predetermined periodic notification whose absolute value of the difference from 24 hours is 1 hour, a prime time given as a prime number of 5 or more, or 1 hour or less than 1 hour before and after the prime number. Time T0 is set, and the process of outputting a timer is repeated every time the regular notification transmission time T0 is reached.

  The regular report transmission unit 60 transmits a regular report message including the node ID based on the output of the regular report transmission timer 62.

Here, the periodic notification transmission time T0 of the periodic notification transmission timer 62 is divided into the following two.
(1) Periodic notification transmission time in which a value obtained by subtracting from 24 hours is a prime number.
(2) Periodic report transmission time in which a value obtained by subtracting 24 hours is a prime number.

The former “regular report transmission time when the value subtracted from 24 hours is a prime number”
(24-23) = 1
(24-19) = 5
(24-17) = 7
(24-11) = 13
(24-7) = 17
(24-5) = 19
(24-1) = 23
The periodic report transmission time T0 is T0 = 23, 19, 17, 13, 7, 5, or 1 (hours).
Is selected.

Among these, when the set time is short, the frequency of periodic notification transmission increases, so (13, 7, 5, 1) is excluded, and in this embodiment, the effective periodic notification transmission time T0 is excluded. ,
T0 = 23, 19 or 17 (hours)
Is used. That is, a 23-hour timer, a 19-hour timer, or a 17-hour timer is used as the periodic notification transmission timer 62.

The latter “periodic notification transmission time in which a value obtained by subtracting from 24 hours is a prime number” is (25−24) = 1.
(29-24) = 5
(34-24) = 7
As the periodical report transmission time T0,
T0 = 25, 29 or 34 (hours)
Can be used.

  That is, a 25-hour timer, a 29-hour timer, or a 34-hour timer is used as the periodic notification transmission timer 62. Note that if the periodic notification transmission time T0 becomes longer, the frequency of node monitoring by the periodic notification becomes too low, so the upper limit is T0 = 34 hours.

  By using the periodic notification transmission timer 62 in which the periodic notification transmission time T0 is set, a periodic notification message is transmitted every time up. For example, in the case of a 23-hour timer, it is delayed by one hour every day in 23 days. It is possible to realize transmission of a regular notification message with each transmission time of 24 hours as a transmission timing.

  4 to 8 are explanatory diagrams showing a list of the number of transmissions and transmission times of the periodic notification transmission timer used in the present embodiment.

  FIG. 4 shows a case where a 23-hour timer is used as a periodic notification transmission timer, and every time the number of transmissions increases, the transmission time is delayed by 1 hour every hour from 00:00, 23:00, 22:00,. It becomes the transmission timing and repeats in a cycle of 23 days.

  FIG. 5 shows a case where a 19-hour timer is used as a periodic notification transmission timer. Each time the number of transmissions increases, the transmission time is delayed by 5 hours, 00 hours, 19 hours, 14 hours,. The transmission timing is reached, and transmission once every 24 hours is repeated in a cycle of 19 days.

  FIG. 6 shows a case in which a 17-hour timer is used as a periodic notification transmission timer. Each time the number of transmissions increases, the transmission time is delayed by 7 hours every 00 hours, 17:00 hours, 10:00 hours,. The transmission timing is reached, and transmission once every 24 hours is repeated in a cycle of 17 days.

  FIG. 7 shows a case in which a 25-hour timer exceeding 24 hours is used as a periodic notification transmission timer. Each time the number of transmissions increases, the transmission time is 00 hours, 02 hours, 03:00,. The transmission timing is advanced every time, and transmission is performed once every hour for 24 hours in a cycle of 25 days.

  FIG. 8 shows a case in which a 29-hour timer exceeding 24 hours is used as a periodic notification transmission timer. Each time the number of transmissions increases, the transmission time is 00 hours, 05 hours, 10 hours,. The transmission timing advances each time, and transmission is performed once every hour for 24 hours in a cycle of 29 days.

  Next, the radio wave repeater of FIG. 2 will be described. The radio wave repeater 14-1 includes a processor 32, a wireless communication unit 34 including a reception circuit and a transmission circuit, an antenna 35, an operation unit 36, a display unit 37, a memory 38, and a power supply unit 40. The processor 32 is provided with a relay processing unit 64, a regular report transmission unit 66, and a regular report transmission timer 68 as functions realized by executing the program.

  The relay processing unit 64 shown in FIG. 1 is assigned as a child node to the relay control table 70 of the memory 38 when the use of the radio relay device 14-1 is started by operating a registration switch provided in the operation unit 36. The node IDs of the wireless sensors 16-11 and 16-12 are registered.

  When registering the node IDs of the wireless sensors 16-11 and 16-12, the sensor registration address is designated using, for example, a 7-segment display of the display unit 37, and then the DIP switch of the operation unit 36 is used. In this state, a registration waiting state is set, and in this state, an activation message or a test message transmitted from the wireless sensors 16-13 and 16-14 is received, a transmission source ID included in the message is acquired, and relay control is performed. The node ID is registered in the table 66.

When the registered address is displayed on the operation unit 36 using the display unit 37, the 7-segment display blinks if it is not registered, and the 7-segment display is turned on if registered.

  Further, each time the relay processing unit 64 registers the node IDs of the wireless sensors 16-11 and 16-12 in FIG. 1 in the relay control table 70, the relay processing unit 64 reads out the registered node IDs, and the wireless reception repeater 12- 1 is transferred by a registration message, and additional registration is performed on the radio reception repeater 12-1.

The relay processing unit 6 4, fire alert message transmitted from the wireless sensor in the wireless communication unit 34 after registration of the node ID for the relay control table 70 has been completed, when receiving a like periodic notification message, each The source ID included in the message is acquired, compared with the node ID registered in the relay control table 70, and when the two match, the received message is relayed. If the two match, the relay transmission is performed. Absent.

  The regular report transmission unit 66 and the regular report transmission timer 68 are the same as the regular report transmission unit 60 and the regular report transmission timer 62 of the wireless sensor 16-11. For example, a 23-hour timer is used and 23 hours have elapsed. A periodic notification message is sent every time.

  The power supply unit 40 uses DC power supplied from the P-type receiver 10, for example, DC24V or a battery (for example, a lithium battery).

Next, the radio reception repeater 12-1 of FIG. 3 will be described. The wireless reception repeater 1 2 -1 includes a processor 42, a wireless communication unit 44 including a reception circuit, an antenna 46, a wired communication unit 48, an operation unit 50, a display unit 52, a memory 54, and a power supply unit 56. .

The processor 42 as a function realized by executing a program, the reception processing unit 72, periodic report receiving unit 7 4 and periodic report reception timer management information 76 is provided. The memory 54 is provided with a relay control table 78. The wireless sensors 16-13 and 16-14 and the radio wave repeater 14 previously assigned as child nodes to the wireless reception repeater 12-1 shown in FIG. A node ID of −1 is registered.

Reception processing unit 72, when the system is started up, registers the node ID of the wireless sensor 16-13,16-14 and radio repeaters 14-1 for the relay control table 7 8. For this registration, for example, a 7-segment display on the display unit 52 is used to specify the registration address of the sensor or wireless repeater, and then a registration waiting state is set with the DIP switch of the operation unit 50. A startup message or a test message transmitted from the wireless sensors 16-13, 16-14 or the radio relay device 14-1 is received, and a transmission source ID included in the message is acquired and registered in the relay control table 74. .

The reception processing unit 72 completes registration of the node IDs of the wireless sensors 16-13 and 16-14 and the radio repeater 14-1 assigned as child nodes, and then performs registration processing of the radio repeater 14-1. upon receiving a registration request message including a node ID registered in the incoming relay control table 7 8 sent during relay node ID of the wireless sensor 16-11,16-12 obtained from the registration request message It is additionally registered in the control table 78. In this case, since the address of the radio repeater 14-1 as the parent node is also sent at the same time, this is also registered.

  Further, when the reception processing unit 72 receives a fire alarm message or a periodic notification message by the wireless communication unit 44, the transmission source ID included in each message and the node ID registered and additionally registered in the relay control table 78 If the two match, the received message is processed, and the other messages are ignored without being processed.

  When the reception processing unit 72 receives and processes the fire alarm message due to the coincidence of the node IDs, the fire alarm signal is generated by the contact output operation for supplying the alarm current from the wired communication unit 48 to the sensor line 18-1. Transmit to P-type receiver 10.

  As shown in FIG. 9, the periodic notification reception timer management information 76 is stored in the node IDs 116-1 to 11-5 of the wireless sensors 16-11 to 16-14 and the radio repeater 14-1 that receive the periodic notification message. Correspondingly, the periodic notification reception timers 118-1 to 118-5 having values of T1 to T5 are managed. The periodic notification reception timers 118-1 to 118-5 have a set time that is an integral multiple of the periodic notification transmission time T0 of the transmission source, for example, 48 hours.

  The periodic notification reception timers 118-1 to 118-5 operate as 48-hour timers, and each time a periodic notification message with a matching node ID is received before the time expires, the reset notification starts, and no periodic notification message is received. Time goes up when time passes. This is a case where the periodic notification message cannot be received twice if the periodic notification message is transmitted by the 23-hour timer.

  Note that the set times T1 to T5 of the periodic notification reception timers 118-1 to 118-5 are an integral multiple of the periodic notification transmission time T0 of the transmission source, for example, two times or more. If the 19-hour timer is set to 38 hours or more, if the 17-hour timer is set to 34 hours or more, the periodical notification message will be timed up and the periodic notification abnormality will be You may make it judge, and it can be set as a suitable method as needed.

The periodic report receiving unit 74 determines that the periodic report is abnormal when the periodic report reception timer has timed out and outputs it, and notifies the P-type receiver of the failure and gives an alarm. That is, by disconnecting the disconnection detection resistor connected to the end of the sensor line 18-1 and creating a pseudo disconnection state, the P-type receiver 10 is notified of the occurrence of a failure due to a periodic report abnormality.

  When a periodic report abnormality is determined, the address of the wireless sensor that has caused the periodic report abnormality can be displayed on the display unit 52 based on the node ID that has determined the periodic report abnormality.

  Further, as shown in FIG. 1, the power supply unit 56 is supplied with DC power from the receiver 10 through the power line 15. However, the DC power may be converted from commercial AC 100 volts to create a power supply. .

  Next, the P-type receiver 10 will be described. The P-type receiver 10 includes a processor 80 that functions as a control unit, line receiving units 82-1 to 82-3, a power supply unit 84, a display unit 86, an acoustic alarm unit 88, an operation unit 90, a transfer unit 92, and a nonvolatile memory. 94.

  As shown in FIG. 1, the sensor lines 18-1 to 18-3 are drawn out from the line receivers 88-1 to 88-3, respectively, and the wireless receiver repeater 14-1 is connected to the sensor line 18-1. Is connected.

  The line receiving unit 88-1 detects the alarm current that flows through the contact operation by the wired communication unit 48 provided in the wireless reception repeater 12-1, and outputs a fire detection signal to the processor 80. The disconnection of the terminating resistor in the wired communication unit 48 of the wireless reception repeater 12-1 is detected as an interruption of the monitoring current when the actual sensor line is disconnected, and a failure detection signal is output to the processor 80.

  The processor 80 includes a CPU, a ROM, a RAM, an AD conversion port, and various input / output ports, and realizes the function of the fire monitoring unit 96 by executing a program by the CPU.

  The fire monitoring unit 96 determines that the fire detection signal of the corresponding sensor line is received when the reception output of the fire alarm signal is obtained by detecting the alarm current by any of the line receivers 88-1 to 88-3. A representative fire display is displayed on the display unit 86, and a district display is performed for each line. An acoustic fire alarm is output from the acoustic alarm unit 88.

  Further, when the line monitoring units 88-1 to 88-3 detect the disconnection of the sensor lines 18-1 to 18-3, the fire monitoring unit 96 displays a representative failure on the display unit 86 and generates a failure. The district is displayed for each line, and a failure warning is issued from the acoustic warning unit 90.

  FIG. 10 is an explanatory diagram showing a message format used in the disaster prevention radio system of FIG.

10, message format 95, the phase correction signal 96, sequence number 98, and a source ID 100, data code 10 2 and the error check code 10 4. The phase correction signal 96 is a preamble signal repeated with “101010... 10” having a predetermined bit length, and prepares for reception by phase synchronization of a reception PLL provided in the wireless communication unit.

  The serial number 98 stores a value that changes in order within a range of 0 to 255 for each transmission of a message, and the reception side can know the order of reception of the message. In the transmission source ID 100, the node ID of the transmission source device is set, and in the present embodiment, for example, the data is 32 bytes.

  The data code 102 is information indicating the contents of the message, and the contents shown in the format of the device status message 106 and the failure message 108 shown in the lower part of the data code 102 are set.

  In the device status message 106, a device status code 114 is set in the data code 102, and the device status code 114 indicates a status such as fire alarm, initial transmission after recovery, transmitter alarm, and periodic notification. In the failure message 108, the device status code 114 and the failure content code 116 are set in the data code 102 portion.

Besides this, there is such registration message and start message and test message to be transmitted from the wireless sensor to a node ID register to be used for additional registration of the node ID for the repeater control table 7 0 in FIG.

  FIG. 11 is a flowchart showing sensor processing by the wireless sensor of FIG. 2 and is realized by execution of a program by the processor 20. In FIG. 11, the sensor process is initialized and self-diagnosed in step S1, and if normal, the process proceeds to step S2 to execute a registration process.

  In the registration process in step S2, a registration mode is set by a dip switch or the like provided in the operation unit 28, and an ID registration start message or test message is transmitted. At this time, if the registration address is designated by the DIP switch of the operation unit 36 of the corresponding radio wave repeater 14-1 and the registration waiting state is set in the registration processing unit 62, the message transmitted in step S2 is received. Then, automatic registration is performed in which the transmission source ID included in the received electronic message is extracted and registered as a node ID in the relay control table 70.

  When the registration process is completed in step S2, the monitoring state is set and the process proceeds to step S3 to determine whether there is a fire alarm. At this time, for example, if a smoke detection signal from the sensor unit 26 exceeds a predetermined threshold, a fire alarm is determined, and a fire alarm message is transmitted in step S4.

  Subsequently, in step S5, it is determined whether or not a periodic report transmission timer, for example, a 23-hour timer has expired. If it is determined that the periodic report transmission timer has expired, a periodic report message is transmitted in step S6, and then step S7. To reset the periodic notification transmission timer.

  In sensor processing, in addition to fire alerts and periodic alerts, messages such as faults and recovery are transmitted, but this is omitted.

  FIG. 12 is a flowchart showing radio wave relay processing by the radio relay unit 14-1 in FIG. 2, and is processing realized by execution of a program by the processor 32.

  In FIG. 12, in the radio wave relay process, after performing initialization and self-diagnosis upon power-on in step S11, if there is no abnormality, registration process of the relay control table 70 is executed in step S12. The registration process of the relay control table 70 registers the node IDs of the wireless sensors 16-11 and 16-12 as child nodes. Further, every time the node ID is registered, a registration request message is transmitted to the wireless reception repeater 12-1 in FIG. 3, and the node IDs of the wireless sensors 16-11 and 16-12 are additionally registered in the relay control table 78. Let

  When the registration process of step S12 is completed, the monitoring state is entered, and whether or not a message has been received is determined in step S13. If it is determined in step S13 that the message has been received, the process proceeds to step S14, where the received message is analyzed, and the source ID obtained from the message in step S15 is compared with the node ID of the table registration registered in the relay control table 70. If a match is determined in step S16, the process proceeds to step S17 as a valid received message, and the received message is relayed and transmitted.

Subsequently periodic report transmission timer at step S18, for example, 23 hours timer has determined whether or not the time is up, when determining the time is up, after transmitting the periodic report message at step S19, regular notification transmitted in step S2 0 Start resetting the timer.

  FIG. 13 is a flowchart showing a wireless reception relay process by the wireless reception repeater 12-1 of FIG. In FIG. 13, when the radio reception repeater 12-1 is turned on, initialization and self-diagnosis are executed in step S21. If there is no abnormality, registration processing of the relay control table 78 is executed in step S22. .

  The registration process of the relay control table 78 registers the node IDs of the wireless sensors 16-13 and 16-14 as child nodes. Further, the registration request message transmitted from the radio wave repeater 14-1 in FIG. 2 is received, and the node IDs of the wireless sensors 16-11 and 16-12 are additionally registered in the relay control table 78.

  When the registration process is completed, the monitoring state is entered. In step S23, it is determined whether or not a message has been received. When a message is received, the message is analyzed in step S24, and the transmission source ID and relay control obtained from the message in step S25. The node IDs registered in the table 78 are compared.

  If it is determined in step S26 that the two match, the process proceeds to step S27 as a valid telegram, and if a fire alarm is determined, in step S28, a notification current is caused to flow by a contact output to the sensor line 18-1. A fire alarm signal is transmitted to the type receiver 10.

  If it is determined in step S29 that the message is a periodic notification message, the process proceeds to step S30 to reset and start a periodic notification reception timer, for example, a 48-hour timer, of the corresponding node specified by the transmission source ID.

  Subsequently, in step S31, it is checked whether or not there is a periodic notification reception timer that has timed up. If there is a periodic notification reception timer that has timed out, it is determined in step S32 that the periodic notification is abnormal, and the sensor line 18-1 is connected to the terminating resistor. By making a pseudo disconnection state by disconnecting, a failure signal is sent to the P-type receiver 10 to output a failure alarm.

  In addition, although said embodiment has taken the example of the system which installed the radio wave repeater, it is applicable similarly to the system which does not install the radio wave repeater.

  In the above embodiment, a timer for a set time in which the absolute value of the difference from 24 hours is 1 hour or a prime number of 5 or more is used as a periodic notification transmission timer. A time timer, such as a 22 hour timer, a 23.5 hour timer, a 21 hour timer, a 26 hour timer, a 27 hour timer, etc. may be used.

  When such a timer is used, the transmission timing in one hour increments in 24 hours cannot be generated, but the transmission timings of the dispersed time in 24 hours are generated, so that the frequency of the periodic notification message is increased. In addition, it is possible to substantially confirm the operation of the device and the communication environment in all time zones of the day.

  In the above embodiment, a wireless reception repeater is connected to a sensor line from a P-type receiver as a fire receiver, but a wireless reception repeater is connected to an R-type receiver having a data transmission function. You may make it do.

  In the above embodiment, a wireless reception repeater is connected to a sensor line from a P-type receiver as a fire receiver, but a wireless reception repeater is connected to an R-type receiver having a data transmission function. You may make it do.

  In addition, the flowcharts in the above-described embodiments have described a schematic example of processing, and the order of processing is not limited to this. Further, it is possible to provide a delay time between each process or between processes, insert another determination, or the like.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: P-type receivers 12-1 to 12-3: Radio reception repeaters 14-1 to 14-3: Radio wave repeaters 15: Power supply lines 16-11 to 16-34: Wireless sensors 18-1 to 18-1 18-3: Sensor lines 20, 32, 42, 80: Processors 22, 34, 44: Wireless communication units 26, 35, 46: Antenna 26: Sensor units 28, 36, 50, 90: Operation unit 30: Battery 38 , 54: Memory 40, 56, 84: Power supply unit 48: Wired communication unit 52, 86: Display unit 58: Sensor processing unit 60, 66: Periodic notification transmission unit 62, 68: Periodic notification transmission timer 64: Relay processing unit 70 78: Relay control table 72: Reception processing unit 74: Periodic report receiving unit 76: Periodic report reception timer management information 82-1 to 82-3: Sensor line 88: Acoustic alarm unit 92: Transfer unit 94: Non-volatile memory 96: Fire monitoring unit 95 Message format 118-1～118-5: periodic report reception timer

Claims (4)

Consists of a plurality of sensor nodes, radio relay nodes, radio disaster prevention nodes and receivers, and the radio disaster prevention nodes receive telegrams transmitted from the sensor nodes or radio relay nodes via radio relay nodes. In the wireless disaster prevention system that transmits the processing result to the receiver connected by a signal line,
In the sensor node and the radio relay node,
A predetermined periodic report transmission time is set such that the absolute value of the difference from 24 hours is one hour, a prime time given as a prime number of 5 or more, or a time less than one hour before and after the one hour or prime time. , A periodic report transmission timer that outputs every periodic report transmission time;
A periodic report transmitter for transmitting a periodic report message including a sender ID based on the output of the periodic report transmission timer;
Provided,
In the wireless disaster prevention node,
A predetermined periodic report reception time which is provided corresponding to the transmission source ID and which is an integer multiple of the periodic report transmission time is set, and reset start is performed every time the periodic report message is received. A periodic report reception timer that is output when it reaches
When the periodic report reception timer has outputted, and periodic report receiving unit for warning a fault notification to the receiver determines that periodic report abnormality,
A wireless disaster prevention system characterized by providing
Consists of a plurality of sensor nodes, a wireless disaster prevention node, and a receiver, and the electronic message transmitted from the sensor node is received and processed by the wireless disaster prevention node, and the processing result is transmitted to the receiver connected by a signal line. In the wireless disaster prevention system,
In the sensor node,
The absolute value of the difference between the inter-hour 24, 1 hour, several hours element given by 5 or more prime, or set a predetermined periodic report transmission time of 1 hour less than the time before and after about the 1 hour or hours-containing And a periodic report transmission timer that outputs every periodic report transmission time;
A periodic report transmitter for transmitting a periodic report message including a sender ID based on the output of the periodic report transmission timer;
Provided,
In the wireless disaster prevention node,
A predetermined periodic report reception time which is provided corresponding to the transmission source ID and which is an integer multiple of the periodic report transmission time is set, and reset start is performed every time the periodic report message is received. A periodic report reception timer that is output when it reaches
When the periodic report reception timer has outputted, and periodic report receiving unit for warning a fault notification to the receiver determines that periodic report abnormality,
A wireless disaster prevention system characterized by providing
3. The wireless disaster prevention system according to claim 1, wherein the periodic notification transmission timer sets 23 hours, 19 hours, or 17 hours as a periodic notification transmission time.
  3. The wireless disaster prevention system according to claim 1, wherein the periodic notification transmission timer sets 25 hours, 29 hours, or 31 hours as a periodic notification transmission time.

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