JP5336322B2 - Wireless disaster prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform a scheduled report on each hour of 24 hours to improve communication reliability without increasing the frequency of the scheduled report. <P>SOLUTION: A scheduled report transmission time is set in a scheduled report transmission timer of each of wireless sensors 16-11 to 16-34, and a scheduled report message is transmitted based on an output of the timer where the scheduled report transmission time is set so that an absolute value of a difference with 24 hours is one hour or a prime number time specified by a prime number of five or more, for example, 23 hours. When a scheduled report reception timer of each of radio receiving repeaters 12-1 to 12-3, the scheduled report reception timer reset and started whenever receiving the scheduled report message reaches a scheduled report reception time and outputs an output signal two times continuously, or outputs an output signal having the time deviation of one hour discontinuously two times during a predetermined day, each radio receiving repeater determines that the scheduled report is unusual and notifies the fault to a P-type receiver 10 so that the P-type receiver outputs an alarm. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a wireless disaster prevention system that transmits an electronically transmitted message from a sensor node such as a wireless sensor to a receiver and issues an alarm.

  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 relates to a wireless disaster prevention system, a sensor node, which performs regular reporting at each time of 24 hours without increasing the frequency of regular reporting, and determines device abnormality in the same time period to improve communication reliability And it aims at providing a radio relay node.

Consists of a sensor node, a radio relay node, a radio disaster prevention node, and a receiver, and the radio disaster prevention node receives a telegram transmitted from the sensor node or a telegram transmitted from the sensor node via a radio relay node. In the wireless disaster prevention system that processes and transmits the processing result to the receiver connected by a signal line,
The sensor node and the wireless relay node are set to a predetermined periodic notification transmission time in which the absolute value of the difference from 24 hours is a prime time given by one hour or a prime number of 5 or more during a predetermined number of days. A periodic report transmission timer that outputs every report transmission time is provided, and a periodic report transmission unit that transmits a periodic report message including a transmission source ID based on the output of the periodic report transmission timer is provided.
In the wireless disaster prevention node,
A periodical report reception time that is set in correspondence with the sender ID, sets a periodical report reception time that is equal to or longer than the periodical report transmission time, resets every time the periodic report message is received, and is output when the periodical report reception time is reached. A report reception timer;
When the periodic notification reception timer outputs continuously for a predetermined number of times of two or more times, or outputs with a time lag within one hour during a predetermined number of days are output discontinuously for a predetermined number of times of two or more. Sometimes it is determined that the periodic report is abnormal, and a periodic report receiving unit for notifying the receiver of the failure and alarming,
Is provided.

Moreover, in another form of this invention, it consists of a sensor node, a wireless disaster prevention node, and a receiver, and the message transmitted from the sensor node is received and processed by the wireless disaster prevention node, and the processing result is connected by a signal line. In the wireless disaster prevention system that transmits to the receiver
A predetermined periodic report transmission time is set in the sensor node so that the absolute value of the difference from 24 hours is a prime time given by one hour or a prime number of 5 or more during a predetermined number of days. Provided with a periodic report transmission timer to output, provided a periodic report transmission unit for transmitting a periodic report message including the sender ID based on the output of the periodic report transmission timer ,
Wireless disaster prevention node
A periodical report reception time that is set in correspondence with the sender ID, sets a periodical report reception time that is equal to or longer than the periodical report transmission time, resets every time the periodic report message is received, and is output when the periodical report reception time is reached. A report reception timer;
When periodic report reception timer has output two or more predetermined number of times continuously, or during a predetermined number of days, and outputs a predetermined number of times more than once output discontinuously with time shift within 1 hour A periodic report receiver that sometimes determines that a periodic report is abnormal and notifies the receiver of the failure and alarms,
Is provided.

  The regular report transmission timer sets, for example, 23 hours, 19 hours, or 17 hours as the regular report transmission time. Further, the regular report transmission timer may set, for example, 25 hours, 29 hours, or 31 hours as the regular report transmission time.

The periodic report receiver
Management information provided with a counter that counts the reception time for 24 times of the periodic notification message transmitted by the periodic notification transmission unit and the number of times of reception failure for each reception time;
Counter control that resets the counter of the corresponding reception time in the management information every time a periodic report message is received and counts up the counter of the corresponding reception time when the periodic report reception timer outputs without receiving the periodic report message And
When the management information is counted up, when two non-zero counters are consecutive, or when output with a time lag within one hour is output for a predetermined number of times more than once in a discontinuous manner A determination unit that determines that the periodic report is abnormal;
Is provided.

In addition, the periodic report receiver
Management information provided with a counter that counts the number of times that the periodic notification message transmitted by the periodic notification transmission unit could not be received every 24 times;
A counter control unit that resets the counter of the number of times of reception in the management information every time a periodic notification message is received, and counts up the counter of the number of times of reception when the periodic notification reception timer outputs without receiving the periodic notification message When,
A determination unit that determines that the periodic notification is abnormal when an output having a time lag within one hour during a predetermined number of days when the management information is counted up is output two or more times in a discontinuous manner;
May be provided.

Note that the counter may be a flag that expresses the number of times of reception failure as a numerical value with 1 as the upper limit, that is, 0 or 1.

  According to the present invention, the periodic notification message is set such that the absolute value of the difference from 24 hours is 1 hour, 5 or more prime numbers 5, 7,..., For example, 23 hours, 19 hours or 17 hours. By sending a periodic notification message every 23 hours by a transmission timer, for example, a 23-hour timer, the periodic notification message is transmitted with a delay of 1 hour per day, and the periodic notification message is sent at the timing of every hour in 24 hours in 24 days. Is sent.

  And when the periodic report message is not received continuously more than twice the predetermined number of times, it is determined that the periodic report is abnormal and the receiver is notified of the failure and displayed, but in addition, the periodic report message is not received However, even when there is a discontinuity with a time lag of 1 hour, it can be determined that the state of the device is bad in the same time zone, and a failure report can be sent to the receiver for display.

  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.

In addition, in order to determine the periodic report abnormality based on the determination result of the predetermined number of times of two times or more, the periodic report is failed when the periodic report fails only once due to communication congestion, etc., although the communication status is not bad. Unnecessary failure alarm output can be prevented, for example, it is possible to judge a report abnormality and avoid alarming with a receiver.

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 reception management information used for a periodic report reception process at the time of using a 23-hour timer as a periodic report transmission timer in this embodiment. Explanatory drawing which showed the reception management information used for the periodic report reception process at the time of using the 19-hour timer used as a periodic report transmission timer in this embodiment Explanatory drawing which showed the reception management information used for the periodic report reception process at the time of using the 17-hour timer used as a periodic report transmission timer in this embodiment Explanatory drawing which showed the reception management information used for the periodic report reception process at the time of using the 25-hour timer used as a periodic report transmission timer in this embodiment Explanatory drawing which showed the reception management information used for a regular report reception process at the time of using the 29-hour timer used as a regular report transmission timer in this embodiment 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. 18 is a flowchart showing details of the periodic report receiving process in step S29 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 in 1F to 3F of a building 11 to be monitored, and are separated from a P-type receiver 10 by floor as a fire receiver. It is connected to the drawn 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. In order to enable processing as a valid electronic message, the registered node ID is transferred from the radio wave repeater 14-1 to the wireless reception repeater 12-1, and is additionally registered. Even when a message is received directly from the wireless sensors 16-11 and 16-12 that are not assigned as child nodes in the device 12-1, a match with the additionally registered node ID is determined and a valid message is received. Can be processed as.

  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 notification message is transmitted each time the set time of the periodic notification 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 set time T1 of the periodic notification 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),
T1 = (24 hours) ± (1 hour)
Thus, a 23-hour timer or a 25-hour timer is used.

In case (B),
T1 = (24 hours) ± (primary time of 5 or more)
Assuming that the prime time is 5 hours and 7 hours, a 19-hour timer or a 17-hour timer is used if it is less than 24 hours, and a 29-hour timer or a 31-hour timer is used if it exceeds 24 hours.

  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.

The periodic notification reception timer sets a set time T2 that is slightly longer than the set time T1 of the periodic report transmission timer, about 1 minute. The periodic report reception timer generates a timer output when the set time T2 elapses without receiving the periodic report message and the time is up.

  In the present embodiment, when the periodic report reception timer generates a timer output twice in succession, it is determined that the periodic report is not operating normally and the P-type receiver 10 Notify the occurrence of a failure. Furthermore, the present invention is also applicable to the case where the output of the periodic notification timer is not continuous twice and the timer output is discontinuous. It is determined that the periodic report is not operating normally, and the P type receiver 10 is notified of the occurrence of a failure.

  The notification of the failure occurrence to the P-type receiver 10 is caused by, for example, an abnormal periodic notification by disconnecting the terminating resistor connected to the sensor line 18-1 from the P-type receiver 10 and creating a pseudo-disconnection state. Notifies the occurrence of a failure and outputs a failure alarm.

  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 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 regular report transmission timer 62 sets a predetermined regular report transmission time T0 in which the absolute value of the difference between 24 hours and the set time is a prime number given by a prime number of 1 hour or 5 or more, and the regular report transmission time T0 The process of outputting a timer is repeated each time

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

  Here, the set time T1 of the periodic notification transmission timer 62 is a time in which the absolute value of the difference from 24 hours is a prime time given by 1 hour or a prime number of 5 or more, and the case (A) (B ) (C), here, in order to simplify the description, the time that is an integer in cases (A) and (B) will be described.

Here, “the time when the absolute value of the difference from 24 hours is a prime time given by a prime number of 1 hour or 5” in the cases (A) and (B) is divided into the following two.
(1) Time when the value subtracted from 24 hours is 1 hour or a prime number of 5 or more.
(2) Time when a value obtained by subtracting 24 hours is 1 hour or a prime number of 5 or more.

The former (1) time is
(24-23) = 1
(24-19) = 5
(24-17) = 7
(24-13) = 11
(24-11) = 13
(24-7) = 17
(24-5) = 19
(24-1) = 23
The set time T1 is T1 = 23, 19, 17, 13, 11, 7, 5 or 1 (hours).
Is selected.

Among these, when the set time is short, the frequency of periodic notification transmission increases, so (13, 11, 7, 5, 1) is excluded, and in this embodiment, the set time T1 is effective. ,
T1 = 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 time (2) is (25-24) = 1.
(29-24) = 5
(34-24) = 7
And the set time T1 is as follows.
T1 = 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 when the set time T1 becomes longer, the frequency of node monitoring by periodic notification becomes too low, so the upper limit is set to T1 = 34 hours.

  By using the periodic notification transmission timer 62 having such a set time T1 and transmitting a periodic notification message every time up, for example, in the case of a 23-hour timer, it is delayed by 1 hour every day, and 24 hours in 23 days. It is possible to realize transmission of a periodic notification message with each time 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.

  Based on such setting of the periodic notification transmission timer, the periodic notification transmission unit 60, for example, based on the 23-hour timer shown in FIG. 4, every time the transmission timing of 23 hours is reached, the transmission source ID and the corresponding time information For example, if it is the first, a periodic notification message including “00” is transmitted.

  Here, the time information to be included in the periodic notification message is to set an initial time that becomes “00” when the first periodic notification message is transmitted, and then sequentially set the time according to the time table of FIG. Time information and synchronization with the actual time is not required.

  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 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.

  When the relay processing unit 60 receives a fire alarm message, a periodic notification message, etc. transmitted from the wireless sensor by the wireless communication unit 34 after the registration of the node ID to the relay control table 70 is completed, The included transmission source ID is acquired and compared with the node ID registered in the relay control table 70. When the two match, the received message is relay-transmitted, and when they do not match, the relay transmission is not performed.

  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 16-1 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 is provided with a reception processing unit 72, a regular report receiving unit 72, and regular report reception management information 76 as functions realized by executing the program. The regular notification management information 76 includes timer management information and reception management information. 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.

  The reception processing unit 72 registers the node IDs of the wireless sensors 16-13 and 16-14 and the radio relay 14-1 with respect to the relay control table 74 when the system is started up. 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. When the registration request message including the node ID registered in the relay control table 70 transmitted at the time of reception is received, the node IDs of the wireless sensors 16-11 and 16-12 acquired from the registration request message are relay controlled. It is additionally registered in the 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 timer management information 76-1 included in the periodic notification management information 76 includes the node IDs 116 of the wireless sensors 16-11 to 16-14 and the radio relay 14-1 that receive the periodic notification message. The periodic notification reception timers 118-1 to 118-5 having values T1 to T5 corresponding to -1 to 11-5 are managed. The periodic notification reception timers 118-1 to 118-5 are timers having a set time T2 whose set time T2 is longer by about 1 minute than the periodic report transmission time T1 of the transmission source.

  The periodic notification reception timers 118-1 to 118-5 start upon reception of the first periodic notification message, and are reset each time a periodic notification message with a matching node ID is received before reaching the set time T2 and time-up. However, the time is up when T2 time elapses without receiving the periodic notification message.

  For example, when the 23-hour timer shown in FIG. 4 is used as the periodic report transmission timer, the reception management information 76-2 shown in FIG. 10 is used as the reception management information included in the periodic report management information 76. The reception management information 76-2 is provided with a counter that counts the number of times the 23-hour timer has counted up at the time in addition to the number and time of the 23-hour timer in FIG. The counters are all set to 0 in the initial state, and are counted when the periodic notification timer provided for the corresponding sender ID reaches the set time T2 and the timer output is generated without receiving the periodic notification message. Will be up.

  11 shows reception management information 78-2 when the 19-hour timer of FIG. 5 is used, FIG. 12 shows reception management information 78-2 when the 17-hour timer of FIG. 6 is used, and FIG. 7 shows reception management information 78-2 when the 25-hour timer is used, and FIG. 14 shows reception management information 78-2 when the 29-hour timer of FIG. 8 is used.

  The periodic report receiving unit 74 calculates the sum of the counts of the counters for 1 hour before and after a certain time when the periodic report reception timers 118-1 to 118-5 are output twice in succession or during a predetermined number of days. When a predetermined number of times, for example, 2 is exceeded, it is determined that the periodic report is abnormal, and the P-type receiver 10 is notified of the failure and alerted.

  In other words, the periodic report receiving unit 74 is provided with a counter for counting the reception time of 24 times of periodic report messages transmitted by the periodic report transmitting units 60 and 66 of the wireless sensor or the radio wave repeater and the number of times of reception failure. For example, the reception management information 76-2 in FIG. 10 is managed, and each time a periodic notification message is received, a counter of the corresponding reception time in the reception management information 76-2 corresponding to the time information obtained from the periodic notification message is displayed. In addition to resetting, the reception counter of the corresponding reception time is counted up when the periodic notification reception timer is output without receiving the periodic notification message.

Further, the periodic report receiving unit 74 determines that the periodic report is abnormal when the counter of the periodic report reception management information counts up for a predetermined number of, for example, two consecutive reception time counters. Notify the receiver of the failure and alert. 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.

  Further, the periodic report receiving unit 74, when the counter of the periodic report reception management information is counted up, when the sum of the counts of the counters for 1 hour before and after exceeds a predetermined number, for example, 2 during a predetermined number of days. It is determined that the periodic report is abnormal, and the P-type receiver is notified of the failure and alerted.

  For example, looking at the reception management information generated by the reception of the periodic notification message using the 19-hour timer in FIG. 11, the number of counts of 6 o'clock 23 o'clock with a one-hour difference and 11 o'clock 22 o'clock is Therefore, the sum of the number of counts at 12:00, 12:00, 22:00, and 23:00 is 2 for 1 hour before and after 22:00.

  In this case, when the counter is counted up by the output of the periodic notification reception timer at 23:00, which is the sixth time, the sum of the counts of 1 hour before and after, that is, 22:00, 23:00, and 24:00 is 1. Periodic report abnormality is not judged.

  On the other hand, when the counter is incremented by the output of the periodic notification reception timer at 22:00, which is the 11th time, the sum of the counts at 12:00, 12:00, 12:00, 22:00, and 23:00 is 2. , The time is discontinuous due to the fact that the periodic notification message has not been received twice in the same time zone, which is 1 hour before and after 22:00 from 21:00 to 23:00, but the periodic notification error And the P-type receiver is notified of the failure and alarmed.

  The relationship of the time difference of 1 hour with respect to each time is shown by connecting the left and right margins with respect to the reception management information 76-2 in FIGS. 11, 12, 14, and 15 to indicate the connection relationship. In the case of the 19-hour timer shown in FIG. 11, 5 times and 19 times before, in the case of the 17-hour timer shown in FIG. 12, 7 times and 17 times before, and in the case of the 25-hour timer shown in FIG. Will check the status of the counter.

  Here, when the sum of the number of counts of the counters for 1 hour before and after exceeds a predetermined number, for example, 2, it is necessary to perform processing for determining that the periodic notification is abnormal during a predetermined number of days, so a day counter is provided. . The day counter is assigned when the counter is counted up by the timer output, starts counting the number of days, and when the preset number of days, for example, 19 days × 2 = 38 days in a 19-hour timer, the assigned counter is set to 0. It is reset so that the counter count is not used to determine the periodic report abnormality beyond the set number of days.

  As another embodiment of the day counter, one day counter is provided, and when any counter is counted up, the day counter is started, and any counter is counted up during operation of the day counter. If it does, reset the day counter. When the day counter finishes counting a predetermined number of days, all counters are reset to zero.

  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 of FIG. 3 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. 15 is an explanatory diagram showing a message format used in the disaster prevention radio system of FIG.

  In FIG. 15, the message format 95 includes a phase correction signal 96, a serial number 98, a transmission source ID 100, a data code 100, and an error check code 102. 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, the device status code 114 is set in the data code 102 portion, and the device status code 114 indicates a status such as fire alarm, initial transmission after recovery, transmitter alarm. In the failure message 108, the device status code 114 and the failure content code 116 are set in the data code 102 portion. Further, in the periodic notification telegram 110, a device status code 114 and time information 118 representing the periodic notification are set in the data code 102 portion.

  In addition to this, there are a registration message used for additional registration of a node ID in the repeater control table 74 of FIG. 2, a startup message and a test message transmitted from the wireless sensor for node ID registration.

  FIG. 16 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. 16, 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 notification transmission timer, for example, a 23-hour timer has expired. If it is determined that the periodic notification transmission timer has expired, a periodic notification message including a transmission ID and time information is determined in step S6. In step S7, the periodic notification transmission timer is reset and started.

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

  FIG. 17 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. 17, 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, in step S18, it is determined whether or not a periodic notification transmission timer, for example, a 23-hour timer has expired. When the time is up, a periodic notification transmission message is transmitted in step S19, and then a periodic notification transmission timer in step S22. Start reset.

  FIG. 18 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. In step S29, a periodic report reception process is executed.

  FIG. 19 is a flowchart showing details of the periodic notification receiving process in step S29 of FIG. In FIG. 19, when the reception of the periodic notification message is determined in step S31, the process proceeds to step S32, and the periodic notification reception timer of the corresponding node specified by the transmission source ID is reset and started.

  Subsequently, in step S33, the transmission source ID and time are acquired from the periodic notification message. For example, in the case of the periodic notification by the 19-hour timer in FIG. 5, the reception management information 76-2 in FIG. And reset the counter of the corresponding time.

  Subsequently, in step S35, it is checked whether or not the periodic report reception timer has expired. If there is a periodical report reception timer that has expired, the corresponding time counter is counted for the reception management information 76-2 in FIG. 11 in step S36. Up.

  Subsequently, when it is determined in step S38 that the count-up is continued twice, the process proceeds to step S39, where it is determined that the periodic notification is abnormal, and the sensor line 18-1 is quasi-disconnected by disconnecting the terminating resistor. Thus, a failure signal is sent to the P-type receiver 10 to output a failure alarm.

  If the count is not counted up twice in step S37, the process proceeds to step S38, where the sum of the counts of the counters for which the time has shifted by the past one hour is taken, and a predetermined number, for example, If the number exceeds 2, since a failure has occurred at the same time, it is determined that the periodic notification is abnormal, and the process proceeds to step S39, where the sensor line 18-1 is quasi-disconnected by disconnecting the terminating resistor. Thus, a failure signal is sent to the P-type receiver 10 to output a failure alarm.

  In the above embodiment, the periodic notification message is transmitted including the time information depending on the periodic notification transmission timer, and the corresponding counter is controlled by the time information on the receiving side. You may make it transmit the frequency information which shows the frequency | count of transmission of a regular report message | telegram. Alternatively, time information may be generated on the reception side in accordance with the reception interval.

  Moreover, although said embodiment has taken the system which installed the radio wave repeater as an example, it can apply similarly to the system which does not install the radio wave repeater.

  Moreover, in the above embodiment, a timer for a set time in which the absolute value of the difference from 24 hours is a prime number of 5 or more is used as the periodic notification transmission timer. For example, a 22-hour timer, a 23.5-hour timer, a 21-hour timer, a 26-hour timer, a 27-hour timer, or the like 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 management information 76-1: Periodic report reception timer 76-2: Reception management information 82-1 to 82-3: Sensor line 88 : Acoustic alarm unit 92: Relocation 94: nonvolatile memory 96: fire monitoring unit 95: message format 110: Periodic Problem message 118-1～118-5: periodically Problem reception timer 120: time information

Claims (6)

Consists of a sensor node, a radio relay node, a radio disaster prevention node, and a receiver, and the radio disaster prevention node receives a telegram transmitted from the sensor node or a telegram transmitted from the sensor node via a radio relay node. In the wireless disaster prevention system that processes and transmits the processing result to the receiver connected by a signal line,
The sensor node and the wireless relay node are set to a predetermined periodic notification transmission time in which the absolute value of the difference from 24 hours is a prime time given by one hour or a prime number of 5 or more during a predetermined number of days. A periodic report transmission timer that outputs every report transmission time is provided, and a periodic report transmission unit that transmits a periodic report message including a transmission source ID based on the output of the periodic report transmission timer is provided.
In the wireless disaster prevention node,
A periodical report reception time that is set in correspondence with the sender ID, sets a periodical report reception time that is equal to or longer than the periodical report transmission time, resets every time the periodic report message is received, and is output when the periodical report reception time is reached. A report reception timer;
When the periodic notification reception timer outputs continuously for a predetermined number of times of two or more times, or outputs with a time lag within one hour during a predetermined number of days are output discontinuously for a predetermined number of times of two or more. Sometimes it is determined that the periodic report is abnormal, and a periodic report receiving unit for notifying the receiver of the failure and alarming,
A wireless disaster prevention system characterized by providing
A wireless disaster prevention system comprising a sensor node, a wireless disaster prevention node and a receiver, receiving and processing a message transmitted from the sensor node by the wireless disaster prevention node, and transmitting a processing result to the receiver connected by a signal line In the system,
In the sensor node, a predetermined periodic report transmission time is set such that the absolute value of the difference from 24 hours is a prime number given by one hour or a prime number of 5 or more for a predetermined number of days. Provided with a periodic report transmission timer, and based on the output of the periodic report transmission timer, a periodic report transmission unit that transmits a periodic report message including a transmission source ID is provided.
In the wireless disaster prevention node,
It is provided corresponding to the sender ID, sets a periodical report reception time that is equal to or longer than the periodical report transmission time, resets every time the periodic report message is received, and outputs when the periodical report reception time is reached Periodic report reception timer,
When the periodic report reception timer has output two or more predetermined number of times continuously, or during a predetermined number of days, a predetermined number of times more than once output discontinuously with time deviation of less than one hour Output A periodic report receiving unit that determines that the periodic report is abnormal when it has occurred, and notifies the receiver of the failure and alarms,
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.
In wireless disaster prevention system according to claim 1 or 2, wherein the periodic report transmission timer is set to periodically report transmission time, 2 5 hours, 29 hours, or wireless disaster prevention system characterized by setting the 31 hours .
In the wireless disaster prevention system according to claim 1 or 2,
The periodic report receiver
Management information provided with a counter that counts, for each reception time, the reception time for 24 times of the periodic notification message transmitted by the periodic notification transmission unit and the number of times of reception failure,
Every time a periodic notification message is received, the counter of the corresponding reception time in the management information is reset, and when the periodic notification reception timer is output without receiving the periodic notification message, the reception time counter is counted up. A counter control unit;
When the count-up of the management information, when the counter is not data consecutive two 0, or a predetermined output with time shift within one hour during the day and output discontinuously by a predetermined number of times more than once A determination unit that sometimes determines that a periodic report is abnormal,
A wireless disaster prevention system characterized by comprising:
In the wireless disaster prevention system according to claim 1 or 2,
The periodic report receiver
Management information provided with a counter that counts the number of times that the periodic notification message transmitted by the periodic notification transmission unit could not be received every 24 receptions;
Each time a periodic report message is received, the counter of the number of times of reception in the management information is reset, and the counter of the number of times of reception is counted up when the periodic report reception timer is output without receiving the periodic report message. A counter control unit;
A determination unit that determines that the periodic notification is abnormal when an output having a time lag within one hour during a predetermined number of days is output at a predetermined number of times more than once in a discontinuous manner when the management information is counted up;
A wireless disaster prevention system characterized by comprising:

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