JP2008271010A - Wireless device for wireless interlocking system and alarm device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless apparatus and an alarm which surely perform linking operation. <P>SOLUTION: The wireless apparatus is provided with a wireless communication means for transmitting a report message and receiving a response message to/from other predetermined wireless apparatuses constituting a broadcasting system, a non-responding apparatus detection means for detecting the wireless apparatus which does not return the response message, and a transmission output change means for changing the radio output of the wireless communication means. When a non-responding apparatus is detected, transmission output is increased, and transmission of the report message is performed again. When the non-responding apparatus is detected again, one of the wireless apparatuses which return the response message is selected and a request message is sent to the apparatus. Then, the wireless apparatus which receives the request message to itself transmits a new report message, receives the response message, and transmits a request response message that includes the information of the non-responding apparatus. When the non-responding apparatus is detected on the basis of the information, the wireless apparatus which receives the request response message reselects a destination, transmits the request message and realizes the sure linking operation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless device constituting a wireless interlocking system and an alarm using the same.

  Conventionally, fire alarms and gas leak alarms have been installed at homes, and the presence or absence of fires or gas leaks detected by these devices can only be ascertained on a stand-alone basis. There were many examples of warnings. For example, in recent years, fire alarms are obligated to be installed in newly constructed units due to revisions to laws and regulations, but alarms detected by these fire alarms are reported to the outside at the place where the alarm condition occurred by voice or display etc. However, there are few things that interlock alarm devices.

  In this case, since it can be recognized only at the place where the alarm condition has occurred, when multiple alarm devices are provided, the interlock connectors of each fire alarm device can be connected by wire or interconnected wirelessly. Thus, it is considered that the alarm action becomes more effective by linking these to perform linked communication.

  When configuring an interlocking system that performs an interlocking operation, it is necessary to link an alarm device or the like, and there are a wired method and a wireless method for interconnecting alarm devices that perform an interlocking operation. Wired connection can be reliably performed, but wiring work is required, so wireless connection is easier to install. However, in the case of wireless interconnection, there is a problem that it is easily affected by ambient noise.

  Therefore, conventionally, in the wireless broadcast communication which is one of the interlocking operations as shown in FIG. 11, in order to prevent the leakage of the broadcast alarm, the fire alarm message from the fire source is set and transmitted three times. While the fire continued, alarm messages were repeatedly sent every 3 minutes. However, in the case where danger notification is performed in all alarm devices in the first alarm message, there is a problem that the transmission of the alarm message for the second time and later is wasted. In addition, there is a problem that the probability that normal communication can be performed does not necessarily increase even if transmission is repeated under the same transmission conditions.

  Therefore, it is conceivable to increase the transmission output only when normal communication cannot be performed, and as disclosed in Patent Document 1 as a conventional technique, transmission is performed by increasing the transmission output at the time of retransmission in the remote control. ing. However, unlike the remote control, the alarm device is always in operation, and the wireless devices used with the alarm device are also always in operation, but these are often battery-powered because of the power supply wiring, so they save power. There is a problem that it is difficult to always use a large transmission output due to severe demands for making it large.

Also, when interlocking multiple alarms, etc., even if the wireless interlocking operation is confirmed at the time of installation, if there is a change in the environment due to movement of furniture or partitioning after that, simply depending on the communication status There remains a problem that it is difficult to ensure linked communication only by increasing the radio wave output.
JP-A-5-336569

  Therefore, in view of the above problems, the present invention provides an interlocking operation such as a reliable broadcast alarm operation in an alarm device constituting the interlocking system when a danger is detected in a wireless interlocking system including a plurality of alarming devices. It is an object of the present invention to realize a wireless device capable of performing the above.

  The wireless device according to claim 1 includes: a wireless communication unit that performs wireless communication with another predetermined wireless device that constitutes a wireless link system; and the wireless communication unit that generates the notification based on occurrence of a notification factor. A notification message including a factor and information indicating a transmission source is transmitted, a response message including information indicating a transmission source transmitted from the other wireless device is received according to the notification message, and the wireless communication unit A control unit that transmits the response message by the wireless communication unit when the notification message is received from the other wireless device, and a transmission output changing unit that changes a transmission output of the wireless communication unit And non-response device detection means for detecting a non-response wireless device that does not transmit the response message based on information indicating a transmission source of the response message, and the control means includes the non-response When the non-response wireless device is detected by the device detection unit, the transmission output changing unit increases the transmission output from the normal transmission output, and retransmits the notification message by the wireless communication unit. When the non-response wireless device is detected by the non-response device detection means based on the response message transmitted from the other wireless device in response to the transmitted notification message, the other response message is transmitted. When a wireless device is selected as a selection candidate and one of them is selected as a destination, a request message including information indicating a report factor and a transmission source is transmitted by the wireless communication unit, and the request message is received by the wireless communication unit , Generating the notification message based on the information included in the request message, transmitting the generated notification message by the wireless communication means, and sending the generated notification message to the notification message A radio apparatus, characterized by receiving the response message sent by Flip.

  According to the wireless device of claim 1, the wireless communication means for performing wireless communication with another predetermined wireless device constituting the wireless interlocking system, and the wireless communication means based on the occurrence of the reporting factor Transmitting a notification message including the notification factor and information indicating the transmission source, receiving a response message including information indicating the transmission source transmitted from the other wireless device in response to the notification message, and the wireless communication And a control means for transmitting the response message by the wireless communication means when the notification message is received from the other wireless apparatus by the means, further comprising: a transmission for changing a transmission output of the communication means Output changing means and non-response device detection means for detecting a wireless device without a response message based on information indicating the wireless device of the received response message. The transmission output change means can change the transmission output as necessary to save power, and the non-response device detection means detects a wireless device that does not respond to the notification message from among the wireless devices that constitute the wireless link system. You can take action. Specifically, when the non-response wireless device is detected by the non-response device detection means, the control means causes the wireless communication means to increase the transmission output from the normal transmission output by the transmission output change means. The message is retransmitted to try to communicate with a wireless device that does not respond. And, based on the response message transmitted from the other wireless device according to the retransmitted notification message, when the non-response device detecting unit detects the non-response wireless device again, A request message including information indicating a report factor and a transmission source by the wireless communication means by selecting one of the other wireless devices that transmitted the response message, that is, a wireless device capable of communication as a selection candidate and selecting one as a destination. Send and ask to have a telegram sent from another wireless device in a different location. In addition, when the request message is received from a different position, based on the information included in the request message, a notification message including a notification factor and a source of the message is generated, and the generation is performed by the wireless communication unit. The received message message is transmitted, and the response message transmitted in response to the transmitted message message is received.

  The wireless device according to claim 2, wherein the control unit receives the request message by the wireless communication unit, generates the notification message based on information included in the request message, and generates the notification message. A request response message including information indicating a transmission source of the response message transmitted in response to the notification message is transmitted by the wireless communication unit to the wireless device that has transmitted the request message as a destination. The wireless device according to claim 1, wherein:

  According to the wireless device of claim 2, in the wireless device of claim 1, the control means receives a request message addressed to itself, generates the notification message based on information included in the request message, The generated notification message is transmitted by the wireless communication unit, and a request response message including information indicating a transmission source of a response message from the wireless device corresponding to the transmitted notification message is transmitted by the wireless communication unit. The transmitted wireless device is transmitted as a destination.

  The wireless device according to claim 3, wherein the control unit receives the request message by the wireless communication unit, generates the notification message based on information included in the request message, and stores the generated notification message as the notification message. When the non-response wireless device is detected by the non-response device detection means based on information indicating the transmission source of the response message transmitted by the wireless communication means and transmitted in response to the notification message, the transmission output changing means In addition, the transmission output is increased from the normal transmission output, the notification message is retransmitted by the wireless communication means, the response message transmitted according to the retransmitted notification message is received, The transmission output changing unit causes the increased transmission output to be a normal transmission output after transmitting the request response message including information on a transmission source included in the response message. A radio apparatus according to.

  According to the wireless device of claim 3, in the wireless device of claim 1, the control means that has received the request message addressed to itself generates the notification message based on information included in the request message, The generated notification message is transmitted by the wireless communication means. Then, when the non-response wireless device is detected by the non-response device detection means based on the information indicating the transmission source of the response message transmitted according to the notification message, the transmission output is changed to the transmission output change means. Is increased from the normal transmission output, and the notification message is retransmitted by the wireless communication means to try more reliable transmission. Receiving the response message transmitted in response to the retransmitted notification message, and transmitting the request response message including the information of the transmission source included in the response message to the transmission source of the request message, The increased transmission power is changed to a normal transmission power by the transmission power changing means.

  The wireless device according to claim 4, wherein the control unit receives the request response message by the wireless communication unit, and the no response device detection unit performs the no response based on the information included in the received request response message. 4. The wireless communication device according to claim 1, wherein when the wireless device is detected, one of the selection candidates is selected as a destination and the request message is transmitted by the wireless communication unit. It is a wireless device.

  According to the wireless device of claim 4, in the wireless device according to any one of claims 1 to 3, the control means receives the request response message by the wireless communication means, and the received request response When the non-response wireless device is detected by the non-response device detection means based on the information included in the electronic message, that is, there is still a non-response device even though a message message is transmitted by requesting another wireless device. When it is known from the information included in the request response message from the other wireless device of the request destination, one of the selection candidates when the request message was previously transmitted is selected as the destination and the wireless The request message is transmitted by communication means.

  The wireless device according to claim 5, wherein the control unit receives the request response message by the wireless communication unit, and the no response device detection unit performs the no response based on information included in the received request response message. When it is detected that there is no wireless device, when the notification message is retransmitted by the wireless communication means, the transmission output changed by the transmission output change means is set to a normal transmission output. The wireless device according to claim 4, wherein the wireless device is a wireless device.

  According to the wireless device of claim 5, in the wireless device of claim 4, the control means receives the request response message by the wireless communication means, and the information included in the received request response message When the non-response wireless device is detected by the non-response device detection means, the transmission power change means increases the normal transmission output by the transmission output change means when retransmitting the notification message. The transmitted output is made normal.

  An alarm device according to claim 6 is the radio device according to any one of claims 1 to 5, a danger detection means for detecting danger and generating danger information as a cause of reporting, the danger information or the other An alarm means for informing the danger based on the danger information included in the notification message received from the wireless device.

  According to an alarm device of a sixth aspect, the wireless device according to any one of the first to fifth aspects, a danger detection means for detecting danger and generating danger information which becomes the reporting factor, and the danger information or A notification means for notifying the danger based on the danger information included in the notification message received from the other wireless device, and detecting and notifying the danger and by the wireless device provided in the alarm device Performs linked operation.

  According to the wireless device of claim 1, a wireless device that constitutes a wireless link system together with another wireless device performs wireless communication with another predetermined wireless device; and Since it includes a transmission output changing means for changing the transmission output, a non-response detecting means for detecting a wireless device that does not return a response message, and a control means for controlling the wireless device using each of the means, a notification including a notification factor When a wireless device that transmits a telegram and does not return a response telegram is detected, it is possible to take countermeasures for the first-stage linked communication that increases the transmission output and retransmits. Since this transmission output increase is performed only when necessary, it is more advantageous than the constant high power transmission in terms of power consumption. In addition, if there is a wireless device that does not return a response message even though it has been retransmitted with increased transmission output, select one of the wireless devices that have already confirmed the communication state that has returned a response message as the destination, It is possible to take a countermeasure against the malfunction of the linked communication in the second stage of transmitting a request message for requesting transmission of a notification message. Conversely, when a request message addressed to you is received, a notification message is sent from a location different from the wireless device that sent the request message, so the communication status is different from when the wireless device is installed. By responding to changes, it is possible to realize more reliable linked notifications.

  According to the wireless device of claim 2, the control unit of the wireless device that has received the request message transmits a notification message generated by itself based on information included in the request message, and sends a response message according to the notification message. Since the request response message including the transmitted wireless device information is transmitted to the wireless device that has transmitted the request message, predetermined wireless devices operate in conjunction with each other.

  According to the wireless device of claim 3, in the wireless device of claim 1, the control means that has received the request message addressed to itself generates the notification message based on information included in the request message, Since the generated notification message is transmitted by the wireless communication means, the notification message is wirelessly transmitted from a location different from the wireless device that has transmitted the request message. Then, when the non-response wireless device is detected by the non-response device detection means based on the information indicating the transmission source of the response message transmitted according to the notification message, the transmission output is changed to the transmission output change means. Is increased from the normal transmission output, and the notification message is retransmitted by the wireless communication means to try more reliable transmission. Further, after receiving the response message transmitted in response to the retransmitted notification message, after transmitting the request response message including the information of the transmission source included in the response message to the transmission source of the request message Since the increased transmission output is changed to a normal transmission output by the transmission output changing means, power saving can be achieved.

  According to the wireless device of claim 4, in the wireless device according to any one of claims 1 to 3, the control means receives the request response message by the wireless communication means, and the received request response When the non-response wireless device is detected by the non-response device detection means based on the information included in the electronic message, that is, there is still a non-response device even though a message message is transmitted by requesting another wireless device. When it is known from the information included in the request response message from the other wireless device of the request destination, one of the selection candidates when the request message was previously transmitted is selected as the destination and the wireless Since the request message is transmitted by the communication means, as long as there is a non-response device, the wireless device that has caused the reporting factor transmits the request message one after another to configure all of the predetermined devices constituting the wireless link system. Since such response is obtained, so that the reliability of the radio link system is remarkably improved.

  According to the wireless device of claim 5, in the wireless device of claim 4, the control means receives the request response message by the wireless communication means, and the information included in the received request response message When the non-response wireless device is detected by the non-response device detection means, the transmission power change means increases the normal transmission output by the transmission output change means when retransmitting the notification message. Therefore, after the interlocking operation is completed, useless power consumption by the wireless communication means is eliminated and power saving can be achieved.

  According to the alarm device of the sixth aspect, since the alarm device includes the wireless device according to any one of the first to fifth aspects, an alarm device having a linked operation function such as reliable broadcast communication is realized. be able to.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  An embodiment of the present invention will be described in the case where a fire alarm is provided with the wireless device of the present invention. The wireless device in the present embodiment is built in the fire alarm, but may be externally attached. FIG. 1 is a principal block diagram of a fire alarm 30 constituting the fire alarm of the embodiment. The fire alarm of this embodiment includes a sensor 2 serving as a danger detection means for detecting danger such as a fire sensor. Further, this alarm device is provided with a wireless communication unit as a wireless communication means for wirelessly communicating with other alarm devices for use in the broadcast alarm system. This includes wireless output switching means that can switch the magnitude of the wireless output. The wireless output switching means can be realized by changing the driving voltage of the wireless output unit, changing the bias voltage of the wireless amplifier to change the current to change the amplification factor, or switching the amplifiers with different outputs. Thus, power saving can be achieved by switching the output. In addition, a danger notification circuit 5, a warning speaker 6, and a warning lamp 7 are provided as notification means for directly reporting the danger to the outside of the alarm device. And the control part 20 which controls the said sensor 2, the radio | wireless communication part 3, and the danger alerting means 5,6,7 is provided. As shown in FIG. 1, the control unit 20 includes a CPU and a memory in which a control program is stored, and an interface for exchanging information with the controlled unit.

  The fire alarm 30 in FIG. 1 has a control unit including a CPU 8, a memory 9, and an interface 10. The CPU 8 performs various processes described below, and the memory stores information necessary for the process. The interface is responsible for exchanging signals between the unit and other alarm units. The memory includes a ROM that stores a flow of various processes of the alarm device, a RAM that stores temporary information, and a rewritable flash memory. The CPU 8 controls the wireless communication unit and the danger notification circuit using a work area in the RAM by a control program stored in the ROM. In the RAM, a flag storage area for storing various states, a message configuration area for configuring an alarm message to be output to the outside as interlocking instruction information, a reception buffer for temporarily storing received messages, and the like are set. In addition, storing all alarm devices that operate in the broadcast system, which is one of the wireless interlocking systems, is performed in flash memory, and responds to changes in the installation environment such as changes in the wireless alarm devices that make up the broadcast system. The stored contents are rewritten. Therefore, all alarm devices operating in the broadcast system know all the other alarm devices that together make up the broadcast system. Further, the CPU 8 obtains a predetermined timer function by using a counter register in the RAM. Here, although fire is taken up as an example of means for detecting danger, sensors such as gas leakage and incomplete combustion may be used. The reporting factor is not limited to danger information, but any information may be used as long as the function of the interlocking system is enhanced by performing interlocking operation.

  FIG. 2 shows the alarm system A constituting the wireless broadcasting system, the kitchen on the first floor, the alarm device B in the living room on the first floor, the alarm device C in the bedroom on the first floor, the alarm device D in the bedroom on the second floor, and the alarm device E. Shows an example installed in the second floor storage room. P1, P2, P3 and P4 on the line connecting the alarm devices represent the size of the wireless output necessary for normal communication between the alarm devices, and the relationship between the sizes is as follows. , P1 <P2 <P3 <P4.

  If the size of the wireless output necessary for normal communication in the above five alarm periods is arranged, a matrix as shown in FIG. 3 is obtained. For example, in order for alarm device A and alarm device E to communicate normally, wireless output P2 is required. In the matrix of FIG. 3, the wireless output between the devices A and E is P2 → P4. The communication between the alarm device A and the alarm device E can be performed with the wireless transmission output P2 at the time of installation. However, when a fire alarm occurs, the communication between the alarm device A and the alarm device E due to the movement of furniture or the like shows a state where the wireless output P4 is required.

  To obtain this matrix, at the time of installation, each alarm device transmits a broadcast message for broadcasting system check, and the transmission output switching means switches the transmission output in multiple stages and stores the output that has been successfully communicated. Thus, each alarm device can be provided. Further, using a device different from the alarm device, the transmission output necessary for normal communication between the installation locations may be checked, and the value may be input to each alarm device. Since each alarm device has this matrix, each alarm device knows the wireless output necessary for communication with all other alarm devices operating in the broadcast alarm system. From the matrix in FIG. 3, the normal transmission output of the devices A, C, and D is P2, and the normal transmission output of the devices B and E is P3. Therefore, when the transmission output is increased, these transmission outputs are described later. It will be transmitted with a transmission output exceeding.

  Hereinafter, the operation of the alarm device equipped with a wireless device having a broadcast function will be described in detail with reference to the drawings. The flow of these processes varies depending on the current operation mode, but the operation mode (current state) is any one of “standby”, “normal”, “retransmission”, and “request”. “Standby” indicates that no fire has been detected. “Normal” sounds after the fire sensor detects a fire (sound by voice) and sends an alarm message as an example of a message to other alarm devices. In the state of waiting for an ACK response, which is an example of a response message, "Resend" increases the transmission output when there is an alarm device that does not return an ACK response in a given alarm device in the first alarm message In the state where the alarm message is retransmitted and an ACK response is awaited, "Request" is the first and second retransmission, and if an ACK response cannot be obtained, request another alarm device to send it. In order to send a request message and wait for a request response message, receive a request message addressed to you, generate a new alarm message, send the alarm message, and wait for an ACK response from another alarm device It is.

  An outline operation by the control of the CPU 8 of the fire alarm 30 will be described. The CPU 8 monitors the fire sensor 2, and when the fire sensor 2 detects smoke in the event of a fire, the CPU 8 controls the danger notification circuit 5 to flash the alarm lamp 7 and flash the alarm speaker via the danger notification circuit 5. 6 fires an alarm with buzzer sound and voice and transmits an alarm message from alarm device A to perform an interlocking alarm operation as shown in FIG. 4, and other alarm devices that have received the alarm message perform an alarm operation. Returns an ACK response. As shown in FIG. 5, alarm devices B, C, D, E other than the alarm device A, which is the fire source that has received the alarm message normally, are instructed via the wireless communication unit 3, In step S60 of the alarm reception process, the red alarm lamp (LED) 7 blinks, and danger is notified by a buzzer sound and voice (step S61).

  When each alarm device receives an alarm message and performs a predetermined normal operation such as a danger notification operation, it sends an ACK response via the wireless communication unit (step S62), and when the predetermined normal operation cannot be performed Transmits a NACK response and ends the alarm reception process (step S63). The timing of the ACK response is performed after elapse of a random time after the danger notification. Specifically, in FIG. 4, alarm device B is TB1, alarm device C is TC1, alarm device D is TD1, and alarm device E is ACK response at the timing of TE1, so the transmission operation of each other's ACK response is mutually The probability of interference decreases. The generation of the random time can be realized by a method of setting a random number generated by the CPU 8 in a timer and counting down.

  When an ACK response is made, an identification code or the like that can identify itself is transmitted. The alarm device A that has received the ACK response shows how the identification codes B, C, D, and E are all received in the operation of the leftmost fire alarm device A in FIG. Thus, by checking the ACK response, it is possible to know the alarm device of the transmission source included in the ACK response, and at the same time, all the alarm devices constituting the broadcast alarm system are stored, so the ACK response You can also know the alarm that does not return.

  FIG. 6 shows the alarm operation over time when the alarm device E does not make an ACK response to the first alarm message. In the upper part of FIG. 6 showing the operation in the normal mode, an alarm message from the wireless alarm device A is shown with an ACK response from the alarm devices B, C, D, and no ACK response from the alarm device E. Yes. Again, the timing of the ACK response is determined randomly. Further, in the lower part of FIG. 6 showing the operation of the retransmission mode, the alarm message transmission at the transmission output increased in comparison with the normal transmission output is timed out in the alarm device A after waiting for the ACK response after the first transmission of the alarm message. And the response to it. Here, the alarm message with the increased transmission output may be included in the transmitted alarm message, and the alarm device that responds to the alarm message for the first time with the increased transmission output will increase its own transmission output. Then, a reliable response can be made by transmitting an ACK response. In this figure, the alarm devices B, C, and D that have already returned an ACK response discard the same alarm message as the first time, and perform only an ACK response at timings TB3, TC3, and TD3 without performing an alarm operation such as ringing again. It is shown. Then, the alarm device E that has not made an ACK response to the first alarm message from the alarm device A normally receives the alarm message from the alarm device A, gives a warning notification such as ringing, and responds to the timing TE3 with an ACK response. Send. As a result, the alarm device A that is the source of fire knows that there was an ACK response from all of the alarm devices other than itself, that is, the alarm devices BC, D, and E, and finished waiting for ACK. Then, the transmission output is reduced to the normal transmission output by the transmission output changing means.

  FIG. 7 shows a process flow starting from step S1 of the alarm process of the fire alarm A that performs the above operation. The alarm device A transmits a warning message (step S2), starts a timer (step S3), and waits for an ACK response (steps S4 and S9). Since an ACK response is transmitted after a lapse of a random time from another alarm device that has received the alarm message, when this ACK response is received, the source alarm device that transmitted the ACK response is stored using an identification code or the like (step S5). ). Since each alarm device stores a list of alarm devices that make up the broadcast alarm system, there is an alarm device that does not make an ACK response by comparing the alarm devices that have returned an ACK response with the alarm devices listed. Can be recognized (step S6). This comparison process becomes a non-response detecting means. If ACK responses from all the specified alarms cannot be obtained, wait for an ACK response for a certain time determined by the timer, and if there is an alarm that does not return an ACK response even if a timeout occurs, an alarm action is performed. If there is still a normal alarm output state (step S10), the wireless output is increased by the wireless output switching means provided in the wireless communication unit (step S12), and the alarm message is again transmitted. Is transmitted (step S2). The part that increases the transmission output for transmission is the operation in the retransmission mode at the bottom of FIG. The wireless output switching means can be realized by changing the driving voltage of the wireless output unit, changing the bias voltage of the wireless amplifier to change the current to change the amplification factor, or switching the amplifiers with different outputs.

  If the transmission output of the wireless communication unit is increased and an ACK response is obtained from all of the predetermined alarm devices, the transmission output is decreased and returned to the normal transmission output (step S7), and the alarm transmission processing is completed. (Step S8). In this way, power saving can be achieved by increasing the transmission output only when necessary and decreasing the transmission output during normal times.

  Here, if the ACK response is not obtained from all of the predetermined alarm devices despite the increase in the transmission output of the wireless communication unit, there is still a leak in the broadcast alarm and the operation of the danger notification Since there is an alarm device that has not been informed and there is a room that has not been informed of danger, when the transmission output has already increased after the timeout, the process proceeds to a request transmission process (step S11).

  Here, the operation of the alarm device when there is an alarm device that does not respond to two alarm transmissions will be described. When the alarm device E does not respond to the alarm message from the alarm device A in the normal mode and the retransmission mode shown in the upper and middle parts of FIG. 8, the fire alarm device A enters the request mode shown in the lower part of FIG. , Send the request message. This is because, in FIG. 2, the alarm device A first transmits an alarm message with the wireless output P2, and the ACK response from the alarm device E cannot be obtained, so the transmission output is increased to P3 and the alarm message is transmitted. Corresponding to the situation where the ACK response from the alarm device E was not obtained despite going. For example, during normal times, alarm device A can communicate with all alarm devices that make up the broadcast communication system with transmission output P2, but the transmission output of P4 is output in the event of a fire due to subsequent changes in the situation. This is a necessary situation. When the transmission output increases, it is necessary to transmit with a transmission output exceeding P4. However, since the size of P4 is unknown at normal times, the increased transmission output is twice or four times the normal time. It will be decided.

  The second half of FIG. 8 shows the behavior of each alarm device in the request mode. For the request message, one of the alarm devices that have already transmitted the ACK response is selected as the destination, and the request message is transmitted to the alarm device. In FIG. 8, the alarm device D is selected as the destination of the request message from the alarm devices that have already returned an ACK response.

  FIG. 9 shows a flow starting with the request transmission process (step S20) of the alarm device that transmits the request message. The selection of the destination to which the request message is sent (step S21) may be selected at random from the alarm devices that have already returned the ACK response, or from the matrix of FIG. The alarm device D that can communicate with the transmission output P1 may be selected. When request transmission is performed a plurality of times, an alarm device that has not yet been requested may be selected.

  As shown in the operation of the request mode in the latter half of FIG. 8, here, the request message designates the alarm device D as the destination, adds information indicating itself, and the alarm message transmitted first by the alarm device A It is assumed that the content of the alarm is added and transmitted. Even if the alarm devices B and C that are not the destinations normally receive the request message, they are not addressed to themselves, so ignore them and send an ACK response to the timings TB6 and TC6 without notifying the danger.

  FIG. 10 shows a request message processing flow of the alarm device that has received the request message addressed to itself. Since the request message is received by all alarm devices that reach the radio, the alarm device that has received the request message determines whether or not the message is addressed to itself (step S41). In the request mode of FIG. 8, since the destination alarm device D is requested to transmit, a new alarm message is created by adding the alarm portion of the alarm message sent from itself as the transmission source. Then, an alarm message is transmitted (step S42). When the alarm device D transmits an alarm message, the alarm device E located in the vicinity transmits a warning notification such as ringing according to the content of the alarm message and transmits an ACK response. The alarm device D stores the alarm device that has returned an ACK response (step S45), checks the correspondence between the fire alarm device A and an alarm device other than itself (step S46), and until time-out occurs (step S46). Step S51) Waiting for an ACK response. In the request message reception process, it is different from the operation of the alarm device A of the request source that the request is not made again.

  However, when the ACK response of the predetermined alarm device is not obtained and a time-out occurs, the wireless transmission output is increased by the transmission output changing means (step S53), the alarm message is transmitted again (step S42), and alarm device A In the same manner as in the above operation, the presence or absence of an ACK response is checked and the alarm device having the ACK response is stored. If the ACK responses of all the predetermined alarm devices can be confirmed, the request response message is transmitted to the transmission source of the request message, and then the wireless transmission output is reduced to the normal transmission output (step S49). The process ends.

  In addition, if the ACK response of the predetermined alarm device cannot be confirmed and time-out occurs again (step S51), and the transmission output has already increased, the alarm device that has returned the ACK response received after transmitting the alarm message so far (Step S47), the request response message is transmitted to the transmission source of the request message (step S48), and then the wireless transmission output is reduced to the normal transmission output (step S48). S49) The request message receiving process is terminated.

  In either case, the request response message includes information on the fire alarm device A that returned an ACK response in response to the alarm message from the alarm device D and the alarm device that returned an ACK response other than the alarm device D. After receiving the request, the alarm device D transmits a request response message, then decreases the wireless transmission output so as to restore the transmission output (step S49), and ends the request message reception process (step S50).

  As shown in the request mode at the bottom of FIG. 8, since the alarm devices B and C have already made a danger notification, they do not give a danger notification such as ringing, but only transmit an ACK response. The alarm device E that has not yet notified the danger sends a ACK response after performing a danger notice such as ringing. And the timing (TC6, TB6, TE7, TD7) at which these ACK responses respond is determined by a randomly determined timer.

  The flow after sending the request message in the processing flow of the alarm device A that sent the request message is to set a timer after sending the request message and wait for the arrival of the request response message as shown in step S23 and after in FIG. (Step S25). When the request response message is received within the waiting time determined by the timer, the request response message includes information on the alarm device that has made a request and returned an ACK response in response to the request. Therefore, the alarm device A that has transmitted the request message knows whether or not all of the predetermined alarm devices (alarm devices B, C, D, and E) have performed an alarm operation by examining the request response message. Can do. Then, if it can be confirmed that all of the predetermined alarm devices have performed the alarm operation, the wireless output is reduced to the original normal operation size by the wireless output switching means (step S28), and the request processing is performed. The process ends (step S29).

  However, when the alarm device that has transmitted the request message determines that all of the predetermined alarm devices are not performing an alarm operation by examining the request response message (step S27), the alarm device first or after the increase in transmission output The destination alarm device is again selected from the alarm devices that have transmitted the ACK response to the second retransmission of the alarm message, and the request message is transmitted (step S21). The same applies when a timeout occurs while waiting for a request response message (step S30).

  It is desirable to select an alarm device other than the alarm device that requested the request once for the selection of the alarm device as the destination again. The alarm devices that have been requested once are stored in the memory, and by removing them from the selection range, all the alarm devices that have returned the target ACK responses can be set as the request destinations in order. If an ACK response cannot be obtained from all of the specified alarm devices even if all of the target alarm devices are requested in a state where the dangerous state still persists, the fire alarm device will send a request transmission process. Returning to the selection of the destination of the flow (step S21), it is attempted to thoroughly notify the danger by repeating the flow of the request mode with all alarm devices that have returned the ACK response as the request destination in order.

  In the above, the fire alarm device has been described as an example in the embodiment, but the present invention can also be applied to various alarm devices such as a gas leak alarm device and a fire gas leak alarm device. Further, the transmission output by the transmission output changing means may be changed not only in two stages of normal time and increase but also in multiple stages so that the transmission output is increased at every retransmission operation.

It is a principal part block diagram of the fire alarm in embodiment of this invention. It is a figure which shows the alarm device group which comprises the broadcast system in embodiment. It is a figure which shows the radio | wireless output required in order to perform communication between the alarm device groups which comprise the broadcast system in embodiment. It is a figure which shows the normal operation | movement in the fire alarm group of embodiment. It is a flowchart in a fire alarm device other than the fire source of the embodiment. It is a figure which shows the normal operation | movement and resending operation | movement of embodiment It is a flowchart of a process of the fire alarm device of the embodiment. It is a figure which shows the normal operation | movement of an embodiment, resending operation | movement, and a request operation | movement. It is a flowchart of the process which concerns on the request | requirement of the fire alarm of embodiment. It is a flowchart of the process of the alarm device which received the request message | telegram of embodiment. It is a figure which shows operation | movement of the conventional broadcast alarm system.

Explanation of symbols

2 Fire sensor 3 Wireless communication unit 4 Antenna 5 Danger notification circuit 6 Speaker 7 Red alarm lamp 8 CPU
9 Memory 10 Interface 20 Control unit

Claims (6)

Wireless communication means for performing wireless communication with other predetermined wireless devices constituting the wireless link system;
The wireless communication means transmits a notification message including the notification factor and information indicating the transmission source based on the occurrence of the notification factor, and indicates a transmission source transmitted from the other wireless device according to the notification message. And a control unit that receives a response message including information and transmits the response message by the wireless communication unit when the notification message is received from the other wireless device by the wireless communication unit. ,
Transmission output changing means for changing the transmission output of the wireless communication means;
A non-response device detecting means for detecting a non-response wireless device that does not transmit the response message based on information indicating a transmission source of the response message,
The control means includes
When the non-response device is detected by the non-response device detection unit, the transmission output change unit is configured to increase the transmission output from a normal transmission output and retransmit the notification message by the wireless communication unit. ,
The non-response wireless device is detected by the non-response device detection means based on the response message transmitted from the other wireless device according to the retransmitted notification message, and the response message is transmitted. Selecting another wireless device as a selection candidate as one of the destinations, and sending a request message including information indicating the reporting factor and the transmission source by the wireless communication means,
When the request message is received by the wireless communication unit, the notification message is generated based on information included in the request message, and the generated notification message is transmitted by the wireless communication unit, and the transmitted message is transmitted. A wireless device that receives the response message transmitted in response to the notification message.   The control means receives the request message by the wireless communication means, generates the notification message based on information included in the request message, transmits the generated notification message by the wireless communication means, The request communication message including information indicating the transmission source of the response message transmitted in response to the notification message is transmitted by the wireless communication unit to the wireless device that has transmitted the request message as a destination. The wireless device described. The control means receives the request message by the wireless communication means, generates the notification message based on information included in the request message, transmits the generated notification message by the wireless communication means, When the non-response wireless device is detected by the non-response device detection means based on the information indicating the transmission source of the response message transmitted according to the notification message,
The transmission output changing means increases the transmission output from the normal transmission output, retransmits the notification message by the wireless communication means, and the response message transmitted according to the retransmitted notification message Receive
The transmission output changing unit causes the increased transmission output to be a normal transmission output after transmitting the request response message including information on a transmission source included in the response message. Wireless device.   The control means receives the request response message by the wireless communication means, and detects the non-response wireless device by the non-response device detection means based on the information included in the received request response message. 4. The wireless apparatus according to claim 1, wherein one of the selection candidates is selected as a destination and the request message is transmitted by the wireless communication unit.   The control means receives the request response message by the wireless communication means, and detects that there is no non-response wireless device by the non-response device detection means based on information included in the received request response message. 5. The transmission output increased by the transmission output changing unit to a normal transmission output by the transmission output changing unit when the radio communication unit retransmits the notification message. Wireless devices.   The wireless device according to any one of claims 1 to 5, danger detection means for detecting danger and generating danger information as the cause of notification, and the notification received from the danger information or the other wireless device An alarm device comprising: an informing means for informing the danger based on the danger information included in the electronic message.

Images