JP2009288901A - Fire alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the usability relating to a stop operation of fire alarm. <P>SOLUTION: When a first operation unit 6a is operated in any one of fire alarm devices TR, irrespective of whether being a fire source, then fire alarm (alarm sound) which is notified (sounded) from alarm units 5 of all fire alarm devices TR is stopped, all at once. When a second operation unit 6b is operated in any one of the fire alarm devices TR, fire alarm (alarm sound) which is notified (sounded) from the alarm units 5 of all of the other fire alarm devices TR, except for the fire alarm device TR of the fire source, is stopped all at once. Accordingly, the fire alarm for notifying in conjunction with all the fire alarm devices TR can be alternatively selected, whether it is stopped in all of the fire alarm devices TR including the fire source or is stopped in all of the other fire alarm devices TR, except for the fire source. As a result, usability relating to a stop operation of the fire alarm is improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fire alarm system in which a plurality of fire alarm devices transmit and receive radio signals using radio waves as a medium.

  In recent years, since the obligation to install fire alarms in houses has become legal, a fire alarm system that links a plurality of fire alarms using radio signals is desired from the viewpoint of workability in existing houses. Such a fire alarm system has a function in which a plurality of fire alarms installed in many places sense a fire and sound a warning sound, and if any fire alarm senses a fire, By transmitting information (fire detection information) that informs fire detection to other fire alarms by radio signal, the fire alarm sounds the alarm sound, and not only the fire source fire alarm but also multiple fires An alarm device can be linked to sound an alarm sound all at once, so that the occurrence of a fire can be notified quickly and reliably (see, for example, Patent Document 1). Such a fire alarm is driven by a battery as a power source in order to take advantage of the characteristic of transmitting fire detection information by radio signal, and is usually in a place where maintenance (battery replacement) is difficult such as indoor ceilings. Since it is installed, it is desirable that it can be used without maintenance for a long period of time such as several years.

  By the way, the fire alarm means provided by this type of fire alarm device senses a fire by detecting the smoke concentration and temperature rise that accompanies the fire, but it occurs for reasons other than fire. For example, it may detect smoke or cigarette smoke associated with cooking and mistakenly detect a fire. And even if a fire is mistakenly detected, all fire alarms will sound together and an alarm will sound, but such misinformation will cause trouble to neighboring dwelling units if it is not stopped immediately. There is a fear.

Therefore, in the conventional example described in Patent Document 1, when a plurality of fire alarms are interlockingly sounding an alarm sound, a fire alarm that detects a fire (hereinafter referred to as a fire source fire alarm). When the alarm stop button is operated, the alarm sound of the fire alarm stops and a reset signal is transmitted from the fire alarm to all other fire alarms, and the reset signal is received. All other fire alarms also stop the alarm sound. However, if the alarm stop button is operated on a fire alarm other than the fire source, the fire source fire alarm can be easily identified by not stopping the alarm sound even if a reset signal is received. I can do it.
JP 2008-4033 A

  In the conventional example described in Patent Document 1 as described above, if the alarm stop button is operated by the fire alarm device of the fire source, the alarm sound can be stopped simultaneously by all the fire alarm devices including the fire source. If the alarm stop button is operated by a fire alarm device other than the fire source, the alarm sound can be stopped simultaneously by all other fire alarm devices except the fire source. However, if it is clearly known to the user that it is a false alarm, the fire source must be turned off unless the fire stop alarm button on the fire source is operated by visiting the location where the fire alarm is installed. The alarm sound could not be stopped all at once for all the fire alarms, and it was not easy to use.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a fire alarm system with improved usability regarding a stop operation of a fire alarm.

  In order to achieve the above object, the invention of claim 1 is a fire alarm system comprising a plurality of fire alarms and transmitting a radio signal using radio waves as a medium between the plurality of fire alarms, When a fire alarm is detected by a fire detection means, a fire detection means for detecting a fire, a warning means for informing a fire alarm, a transmission means for transmitting a radio signal, a reception means for receiving a radio signal, and a fire detection means Causes the alarm means to notify the fire alarm and causes the other fire alarm to transmit a radio signal including a fire alarm message for notifying the fire alarm from the transmitting means, and is transmitted from the other fire alarm by the receiving means. A control means for notifying a fire alarm to a warning means when a wireless signal is received and the fire warning message is received, and an operation input receiving means for receiving an operation input for stopping the fire alarm The operation input receiving means has a first operation section and a second operation section, and outputs a first alarm stop operation signal to the control means when the first operation section is operated, and the second operation section When operated, the second alarm stop operation signal is output to the control means, and the control means of each fire alarm stops the alarm means when receiving the first or second alarm stop operation signal. The first alarm is caused by the radio signal transmitted from the transmission means and the reception means receives the radio signal including the first or second alarm stop message for causing the other fire alarm to stop the notification of the fire alarm. When a stop message is received, the alarm means stops the fire alarm notification regardless of whether the fire detection means detects a fire, and when a second alarm stop message is received, the fire detection means detects a fire. do it And wherein the stopping the notification of the fire alarm only to the alarm means in the absence.

  According to the invention of claim 1, regardless of whether it is a fire source or not, if the first operation part is operated in any of the fire alarms, the fire alarm notified from the alarm means of all the fire alarms Stop all at once, and when the second control unit is operated in any of the fire alarms, all other fire alarms except the fire alarm (the fire is detected by the fire detection means) Because the fire alarms that are reported from all the alarming means stop at the same time, stop the fire alarms that all fire alarms work in conjunction with all the fire alarms including the fire source or remove the fire source It is possible to selectively select whether to stop at all other fire alarms, and the usability regarding the fire alarm stop operation is improved.

  According to a second aspect of the present invention, in the first aspect of the invention, each of the fire alarms includes a main body housing for housing other than the operation input receiving means, an operation housing for storing the operation input receiving means, and an operation input receiving means. And a transmission line for transmitting an operation signal corresponding to the received operation input.

  According to the invention of claim 2, the operation housing in which the operation input receiving means is accommodated can be installed at a place away from the main body housing, and the operability of the first operation unit and the second operation unit is improved.

  According to a third aspect of the present invention, in the first aspect of the invention, each of the fire alarms includes a main body housing for housing other than the operation input receiving means, an operation housing for storing the operation input receiving means, and an operation input receiving means. And an operation signal transmission means for wirelessly transmitting an operation signal corresponding to the accepted operation input.

  According to the invention of claim 3, the operation housing in which the operation input receiving means is accommodated can be installed at a place away from the main body housing, and the operability of the first operation unit and the second operation unit is improved. Since it is not necessary to provide wiring between the operation housing and the main body housing, workability is also improved.

  The invention of claim 4 is the invention according to any one of claims 1 to 3, wherein the control means of each fire alarm device is allowed to stop the alarm means when the alarm stop message is received. When the control or the alarm stop message is received, either one of the stop prohibition control that does not stop the alarm means from stopping the alarm of the fire alarm is executed.

  According to the invention of claim 4, since it is possible to alternatively set whether or not to stop the fire alarm notification when an alarm stop message is received for each fire alarm device, Appropriate operation according to the installation environment becomes possible, improving usability.

  The invention of claim 5 is the invention of any one of claims 1 to 3, wherein each fire alarm has an identification code of a group to which it belongs or an identification code for identifying another fire alarm belonging to the same group. Storage means for storing, the control means of each fire alarm device, when the operation input of the fire alarm stop is accepted by the operation input accepting means, as well as the alarm stop message from the fire alarm device belonging to the same group by the receiving means When received, the alarm means stops fire alarm notification.

  According to the invention of claim 5, when an alarm stop message is received from a fire alarm device belonging to a different group, the fire alarm notification is not stopped, and when an alarm stop message is received from a fire alarm device belonging to the same group, the fire is stopped. Since the alarm notification is stopped, appropriate operation according to the installation location or installation environment of each fire alarm is possible, and the usability is improved.

  The invention of claim 6 is the invention of any one of claims 1 to 5, wherein each fire alarm has a setting means for setting an alarm stop time, and the control means of each fire alarm is a receiving means. After the fire alarm message is received at, start the time limit for the alarm stop time, and if the fire detection means detects a fire when the time limit for the alarm stop time is over, let the alarm means notify the fire alarm and others A wireless signal including a fire alarm message for notifying the fire alarm of the other is transmitted from the transmission means, and is transmitted from the other fire alarm by the reception means until the time limit of the alarm stop time ends. If the wireless alarm signal is received and the fire alarm message is received, the alarm means is notified of the fire alarm.

  According to the invention of claim 6, when a fire alarm message is received from a fire alarm device that has detected a new fire during the time limit of the alarm stop time, the fire alarm notification can be resumed immediately, and the alarm is set by the setting means. Since the stop time can be set to an arbitrary time, it is possible to set an appropriate alarm stop time according to the installation location or installation environment for each fire alarm device, thereby improving usability.

  According to the present invention, the usability regarding the fire alarm stop operation is improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1A is a system configuration diagram of the present embodiment, and a fire alarm system is configured by a plurality of fire alarm devices TR (only two are illustrated). In the following description, when the fire alarm devices TR are individually shown, they are expressed as fire alarm devices TR1, TR2,..., TRn, and when collectively shown, they are expressed as fire alarm devices TR.

  The fire alarm TR transmits a radio signal using radio waves as a medium from the antenna 3 and receives a radio signal transmitted from another fire alarm TR by the antenna 3, and a sound (buzzer sound or voice message). Etc.), the alarm unit 5 for informing (sounding from the speaker) a fire alarm (hereinafter referred to as “alarm sound”) and the alarm unit 5 when a fire is detected by the fire detection unit 4 with a microcomputer as a main component. A control unit 1 that causes a radio signal including a fire alarm message to be sent to the other fire alarm device TR and a fire alarm message to be transmitted to another fire alarm device TR, and an alarm sound to be output as will be described later An operation input receiving unit 6 that receives an operation input for stopping the operation and a battery power supply unit 7 that supplies an operating power to each unit using a battery such as a dry battery as a power source.

  The radio transmission / reception unit 2 transmits / receives a radio signal using radio waves as a medium in accordance with “radio station of low power security system” defined in Article 6, Paragraph 4, Item 3 of the Radio Law Enforcement Regulations. A unique identification code is assigned to each fire alarm device TR1, TR2,..., And the destination of the radio signal and the fire alarm devices TR1, TR2,. In addition, the fire detection unit 4 detects fire by detecting smoke, heat, flames, and the like generated with the fire, for example. However, detailed configurations of the wireless transmission / reception unit 2 and the fire detection unit 4 are well known in the art and will not be described in detail.

  As shown in FIG. 1B, the operation input receiving unit 6 has a plurality of operation units including a first operation unit 6a and a second operation unit 6b composed of pushbutton switches, and the operation unit is operated. As a result, an operation input corresponding to each operation unit is received and an operation signal corresponding to the operation input is output to the control unit 1.

  The control unit 1 realizes various functions to be described later by executing a program stored in the memory with a microcomputer. When the fire detection unit 4 detects the occurrence of a fire, the control unit 1 drives a buzzer included in the alarm unit 5 to sound an alarm sound, or an alarm voice message (stored in a memory or the like in advance) ( For example, in order to notify the fire alarm by causing the speaker to sound “fire”, etc., and to notify the fire alarm also in other fire alarm devices TR, the wireless transmission / reception unit 2 transmits a radio signal including the fire alarm message. Send it. Also, when the wireless transmission / reception unit 2 receives a wireless signal transmitted from another fire alarm device TR, the control unit 1 controls the alarm unit 5 to sound an alarm sound. That is, in the control unit 1, when the fire detection unit 4 detects a fire, the alarm unit 5 sounds an alarm sound to notify the fire alarm, and the wireless transmission / reception unit 2 transmits a radio signal including the fire alarm message. Have.

  Here, in the radio equipment regulation Article 49-17 “Radio equipment of radio stations of the low power security system” of the Radio Law Enforcement Regulation, the period during which radio signals may be continuously transmitted (transmission period) is 3 seconds or less. It is stipulated that the period (pause period) provided between the transmission period and the transmission period in which the radio signal should not be transmitted is 2 seconds or more (see No. 5 of the same article). For this reason, in the control unit 1 in the present embodiment, the wireless signal is transmitted during the transmission period that complies with the wireless facility rules, and the transmission is stopped and received during the suspension period.

  Further, in order to extend the battery life of the battery power supply unit 7 as much as possible, the control unit 1 repeatedly counts a predetermined intermittent reception interval (however, the intermittent reception interval is longer than the transmission period) with a timer built in the microcomputer. In addition, every time the intermittent reception interval is counted, the wireless transmission / reception unit 2 is activated to check whether a desired radio wave (radio signal transmitted by another fire alarm device TR) can be received, and the radio wave is captured. If not, the average power consumption is greatly reduced by immediately stopping the wireless transmission / reception unit 2 and shifting to the standby state. The radio wave reception check is performed based on the received signal strength indication signal (Receiving Signal Strength Indication: RSSI signal) output from the wireless transmission / reception unit 2 and is a DC voltage signal proportional to the magnitude of the received signal strength. The details are well known in the art and will be omitted.

  Further, the control unit 1 of a specific fire alarm device TR1 (hereinafter referred to as a master station) activates the wireless transmission / reception unit 2 periodically (for example, every 24 hours) to establish other fire alarm devices TR2, TR3,. A radio signal including a periodic monitoring message is transmitted in order to confirm (periodic monitoring) whether or not (hereinafter referred to as a slave station) is operating normally. In the slave stations TR2,..., The control unit 1 monitors whether or not the fire detection unit 4 has failed and whether or not the battery power supply unit 7 has run out of battery at regular intervals (for example, every hour), and the monitoring result ( The presence / absence of a failure and the presence / absence of a battery are stored in a memory (not shown), and when a periodic monitoring message is received from the master station TR1, a radio including a notification message for notifying the monitoring result stored in the memory A signal is returned to the master station TR1. After transmitting the radio signal including the notification message, the control unit 1 of the master station TR1 switches the radio transmission / reception unit 2 to the reception state and receives the radio signal transmitted from each fire alarm device TR2,. There is a slave station TR2, ... that does not send a radio signal containing a notification message within a predetermined time after sending a radio signal containing the message, or there is a failure in a notification message sent by any of the slave stations TR2, ... Alternatively, when the result of monitoring that the battery has run out is to be notified, the slave station TR2,... Malfunctions by driving a buzzer provided in the alarm unit 5 to sound a notification sound (communication is disabled or there is a fault, the battery is dead Etc.) has also been reported. When the control unit 1 of the master station TR1 and the slave stations TR2,... Determines that a failure or a battery has run out, a warning sound for immediately informing the occurrence of an abnormality (failure or battery runout) from the alarm unit 5. (Buzzer sound, voice message, etc.) are sounded from the speaker of the alarm unit 5.

  Further, the control unit 1 of the master station TR1 detects the fire and causes the alarm unit 5 to sound an alarm sound and transmits a fire alarm message to each of the slave stations TR2,..., Or any of the slave stations TR2. After receiving the fire alarm message from..., The wireless transmission unit 2 is caused to transmit a synchronization signal at a constant period. This synchronization signal is a signal that defines a time slot necessary for performing TDMA (time division multiple access) wireless communication (hereinafter referred to as “synchronous communication”) between a plurality of fire alarms TR. The one cycle is divided into a plurality of time slots, and one different time slot is allocated to each of the slave stations TR2,. Then, a message from the master station TR1 to the slave stations TR2,... Is transmitted in a synchronization signal, and a radio signal including a message from the slave station TR2,... To the master station TR1 is assigned to each slave station TR2,. Stored in the current time slot and transmitted. Therefore, it is possible to reliably avoid collision of radio signals transmitted from a plurality of fire alarm devices TR (the master station TR1 and the slave stations TR2,...). Although the time slot assignment for each fire alarm device TR may be fixed, the time slot assignment information may be notified to each slave station TR2,... By a synchronization signal transmitted from the master station TR1.

  FIG. 2 shows a frame format of a radio signal transmitted and received by the fire alarm device TR. A synchronization bit (preamble: PA), a frame synchronization pattern (unique word: UW), a destination address DA, a source address SA, a message M, One frame is composed of a CRC code. Here, if the identification code of each fire alarm device TR is set as the destination address DA, only the fire alarm device TR of the identification code receives a radio signal and acquires a message. By setting a special bit string that is not assigned to the fire alarm TR (for example, a bit string with all bits set to 1), a wireless signal is broadcast (multicast) to obtain a message for all the fire alarm TRs. Can be made. For example, a radio signal including a fire alarm message is broadcast from the master station TR1 to all the slave stations TR2,. The control unit 1 transmits the radio signal for one frame from the radio transmission / reception unit 2 continuously in a number that can be transmitted within one transmission period when the radio signal is transmitted asynchronously. When transmitting and receiving data in the TDMA system, it is not necessary to store a plurality of frames of radio signals in one time slot.

  Next, referring to the time chart of FIG. 3, the transmission / reception operation of the present embodiment when shifting to the TDMA wireless communication will be described.

  For example, when the fire detection unit 4 detects a fire in the slave station TR2, the control unit 1 of the slave station TR2 sounds an alarm sound from the alarm unit 5 and activates the wireless transmission / reception unit 2 to transmit a radio signal including a fire alarm message. Send (multicast). At this time, the control unit 1 of the transmission source child station TR2 continuously transmits radio signals (hereinafter referred to as “continuous transmission”) by the number of frames that can be transmitted within the transmission period, and pauses after the transmission period. In the period (reception period), the wireless transmission / reception unit 2 is switched to the reception state. Although each fire alarm device TR is asynchronously intermittently received, a wireless signal including a fire alarm message can be received by repeating a certain number of times (for example, two times) of transmission (continuous transmission) period. .

  Here, if the low-power radio is used, the wireless communication distance can be sufficiently covered as long as it is within an area of a normal house. Therefore, the fire source child station TR2 can connect other fire alarm devices TR (master station TR1 and It is usually possible to send a message to other slave stations TR3,. However, as described above, the master station TR1 periodically monitors the slave stations TR2 to TR5, and the normality of the communication path is confirmed between the master station TR1 and each of the slave stations TR3 to TR5. However, since the communication path between the slave stations TR2 to TR5 has not been confirmed, there is a possibility that a message does not reach a certain slave station due to the influence of an obstacle, for example.

  Therefore, the control unit 1 of the master station TR1 that has received the fire alarm message transmits a radio signal (frame) including the fire alarm message N times to all the other slave stations TR2 to TR5 including the slave station TR2 that is the transmission source. The wireless transmission / reception unit 2 is continuously transmitted, and the wireless transmission / reception unit 2 is switched to the reception state after the N transmissions. When the control unit 1 of the other slave stations TR3 to TR5 receives a fire alarm message transmitted from the slave station TR2 or the master station TR1, it immediately sounds an alarm sound from the alarm unit 5 and sends a fire alarm message from the radio transceiver unit 2. A response message (ACK) for confirming reception is returned by a radio signal. In addition, when all of the fire alarms TR notify the fire alarm (sounds an alarm sound) when a fire is detected by at least one fire alarm TR in this manner, hereinafter, it is referred to as “fire interlocking”. .

  Here, when each slave station TR2,... Receiving the fire warning message from the master station TR1 returns a radio signal including a response message asynchronously, the radio signals transmitted from the plurality of slave stations TR2,. If the master station TR1 does not reach the station TR1 and repeats the retransmission of the fire alarm message, the battery may be exhausted earlier, or the switching from asynchronous communication to synchronous communication, which will be described later, may be delayed. Therefore, the control unit 1 of the master station TR1 stores the order i (i = 1, 2,..., N) of the frame at the head of the message M in each radio signal (frame). In the control unit 1 of..., The timing at which the radio transmission / reception unit 2 of the master station TR1 switches from the transmission state to the reception state is estimated based on the order i stored in the message M of the received radio signal. That is, assuming that the frame length of one frame is Tf [seconds], when Tf × (N−i) [seconds] has elapsed from the end of the received wireless signal, the wireless transmission / reception unit 2 of the master station TR1 is in a transmission state. Can be estimated to switch to the receiving state.

  Then, the period during which the radio transmission / reception unit 2 of the master station TR1 is switched to the reception state is divided into M time slots, and time slots k (k = 1, 2,...) Determined for each slave station TR2,. .., M), if a radio signal including a response message is stored and returned from each slave station TR2,... To the master station TR1, collision of radio signals including a response message transmitted from the slave station TR2,. be able to. In FIG. 3, each of the slave stations TR2 to TR5 stores a radio signal including a response message in each of the time slots 1, 2, 3, and 4, and sends it back to the master station TR1.

  When receiving the ACK from all the other slave stations TR3 to TR5, the control unit 1 of the master station TR1 causes the radio transmission / reception unit 2 to transmit a synchronization signal for defining a time slot at a constant period. In the present embodiment, the first time slot TS1 is the slave station TR2, the second time slot TS2 is the slave station TR3, the third time slot TS3 is the slave station TR4, and the fourth time slot TS4 is the slave station. Each is assigned to TR5.

  Here, the master station TR1 periodically monitors each of the slave stations TR2 to TR5, and the normality of the communication path is confirmed between the master station TR1 and each of the slave stations TR3 to TR5. The communication path between the stations TR2 to TR5 has not been confirmed. Therefore, when a large number of slave stations TR2,... Are arranged, the number of communication paths between the slave stations TR2,. Since the exhaustion becomes intense, as described above, the specific fire alarm device TR1 is set as the master station, and the other fire alarm devices TR2,. By notifying a message (to be described later), even if there are slave stations that cannot establish a communication path with each other, it is possible to reliably link the fire.

  In addition, when all the fire alarms TR start the alarm sound, the synchronization signal is transmitted from the master station TR1 at a constant cycle as described above, and the asynchronous communication is shifted to the TDMA synchronous communication. However, the control unit 1 of the master station TR1 repeatedly transmits a fire alarm message to all the slave stations TR2,. Then, the control unit 1 of each slave station TR2,... Checks the state of the alarm unit 5 every time it receives a fire alarm message transmitted from the master station TR1, and if the alarm unit 5 is stopped, the alarm unit 5 Sound the alarm again. Therefore, after the fire alarm is started to be notified by all the fire alarms TR, all the other fire alarms (children) are set in a plurality of time slots defined by the synchronization signal transmitted by the specific fire alarm (master station) TR1. Stations) TR2,... Can be assigned to perform wireless communication by time division multiple access (TDMA) to avoid collisions. Furthermore, all other fire alarms from a specific fire alarm (master station) TR1 The fire alarm can be reliably notified to the slave stations TR2,. As a result, a plurality of fire alarms TR can be effectively interlocked while avoiding collision of radio signals.

  By the way, the fire alarm system of this embodiment is in a state where no fire is detected in any of the fire alarms TR (standby state) and in a state where all the fire alarms TR are sounding an alarm sound (linked sounding) State), as described later, only the fire alarm TR that detects the fire (fire source) sounds the alarm sound, and the fire alarm TR other than the fire source stops the alarm sound (interlocked) The operation state is transited between (stop state). That is, when a fire is detected by at least one of the fire alarm devices TR in the standby state, as described above, the fire alarm is sent from the fire slave station TR2 and the master station TR1 to all the other slave stations TR3,. When the message is transmitted, an alarm sound is generated in all the fire alarm devices TR including the master station TR1 and the slave stations TR2,.

  When an operation input for stopping the alarm sound is received by the operation input receiving unit 6 of any fire alarm device TR in the interlocking sounding state, if the fire alarm device TR is the master station TR1, The station TR1 transmits a message (alarm stop message) requesting the stop of the alarm sound to all the slave stations TR2,... Or if the fire alarm device TR is the slave station TR2,. When the master station TR1 receives the alarm stop message from the stations TR2,... And transmits the alarm stop message to the other slave stations TR2,. Transition to the stop state. However, when the first operation unit 6b is operated as will be described later, the alarm sound is also stopped by the fire alarm device TR of the fire source. Here, the control unit 1 of the master station TR1 keeps the fire detection status of the master station TR1 and each slave station TR2,... Updated as needed in a memory (not shown), and all the fire alarms TR as will be described later. When a fire is no longer detected in, transition from the fire-linked state to the standby state.

  When the interlocking ringing state is changed to the interlocking stop state, the control unit 1 of the master station TR1 starts a predetermined alarm sound stop time (alarm stop time) for a predetermined time (for example, 5 minutes). Then, after the alarm sound stop time has elapsed, the control unit 1 of the master station TR1 refers to the fire detection status held in the memory, and if all the fire alarms TR have not detected fire, When a recovery notification message is sent, a transition is made from a fire-linked state to a standby state, and if a fire is detected by at least one fire alarm TR, the fire is stopped by sending a fire alarm message using a synchronization signal. Transition from state to linked ringing state. Even when any fire alarm device TR newly detects a fire in the interlock stop state, the control unit 1 of the master station TR1 transmits a fire alarm message by a synchronization signal to change from the interlock stop state to the interlock ringing state. Transition.

  For example, as shown in the time chart of FIG. 4, in a fire-linked state (linked ringing state) in which the master station TR1 is a fire source, an operation input for stopping an alarm sound is received by the operation input reception unit 6 of the slave station TR4 that is not a fire source. When the alarm stop message is transmitted from the slave station TR4 by being accepted, the control unit 1 of the master station TR1 that has received the alarm stop message transmits the alarm stop message M2 by the synchronization signal and sets the time limit of the alarm sound stop time. Start. However, when the second operation unit 6b is operated as will be described later, the alarm unit 5 continues to sound the alarm sound at the master station TR1 that is a fire source. When the time limit of the alarm sound stop time is over, the control unit 1 of the master station TR1 confirms the fire detection status of its own fire detection unit 4 and the fire detection status in the slave stations TR2,. When the fire alarm device TR detects a fire, the fire alarm message is transmitted again to each of the slave stations TR2,.

  On the other hand, as shown in the time chart of FIG. 5, if the fire is extinguished within the warning sound stop time and the fire detection unit 4 stops detecting the fire, the control unit 1 of the master station TR1 After a lapse of time, a recovery notification message is transmitted to each slave station TR2,... By a synchronization signal, and when an ACK returned from all the slave stations TR2,. By stopping the transmission, the wireless communication (synchronous communication) by the TDMA system returns to the wireless communication (asynchronous communication) by intermittent transmission / intermittent reception.

  Further, as shown in the time chart of FIG. 6, if the fire at the fire station extinguishes and the fire detection unit 4 of the slave station TR 4 does not detect the fire in the interlocking ringing state with the slave station TR 4 as the fire source, A recovery notification message is transmitted from the station TR4 to the parent station TR1. The control unit 1 of the master station TR1 that has received the recovery notification message refers to the fire detection status held in the memory, and if no fire is detected by all the fire alarms TR, the recovery notification message M3 is sent by a synchronization signal. It transmits to each slave station TR2,. When the control unit 1 of the master station TR1 receives ACKs returned from all the slave stations TR2,..., Transitions from the interlock stop state to the standby state, and stops the transmission of the synchronization signal, thereby stopping the asynchronous communication from the synchronous communication. Return to.

  On the other hand, as shown in the time chart of FIG. 7, when a fire is newly detected by another fire alarm device (for example, the slave station TR3), a recovery notification message is received from the slave station TR4 that is the first fire source. The control unit 1 of the master station TR1 refers to the fire detection status held in the memory, and since the slave station TR3 is detecting a fire, it does not send a recovery notification message and continues to send a fire alarm message. Maintain a fire-linked condition.

  Here, the processing performed by the control unit 1 of the master station TR1 in the fire-linked state is briefly summarized with reference to the flowchart of FIG. When a fire alarm message is received from any of the slave stations TR2,... In the standby state (step S1), the control unit 1 of the master station TR1 updates the fire detection status held for each slave station TR2,. (Change from fire non-detection to fire detection) (step S2) On the other hand, if a recovery notification message is received from the fire slave station TR2,... (Step S3), the fire detection status of the slave station TR2,. Update from detection to non-fire detection (step S4). When a recovery notification message is not received from any of the slave stations TR2,... In the fire interlocking state, when the alarm stop message is received from any of the slave stations TR2,... (Step S5), the control unit 1 of the master station TR1 issues an alarm. Is determined to be stopped and a synchronization signal including an alarm stop message is transmitted from the wireless transmission / reception unit 2 (step S6). Also, an alarm stop message is periodically transmitted by a synchronization signal from the transition from the interlocking sounding state to the interlocking stop state until the alarm sound stop time elapses (steps S7, S8, S6), and the alarm sound stop time. (Step S8), it is determined whether or not the fire alarms (master station TR1 and slave stations TR2,...) That are detecting fire remain by referring to the fire detection status held in the memory (step S8). S9) If at least one fire alarm is still being detected, it is determined that the fire interlocking is continued and a synchronization signal including a fire alarm message is transmitted from the wireless transceiver 2 (step S10). If the fire alarm is not fire-detected, the recovery from the fire-linked state to the standby state is determined, and a synchronization signal including a recovery notification message is transmitted from the wireless transmission / reception unit 2 (step S11).

  Here, if any of the slave stations TR2,... Does not return an ACK in response to the recovery notification message, the control unit 1 of the parent station TR1 transmits a radio signal including the recovery notification message from the radio transmission / reception unit 2 again. It is desirable to stop the radio transmission / reception unit 2 from transmitting a synchronization signal when an ACK is received from the slave stations TR2,. Further, when the master station TR1 fails in the interlocking ringing state or the interlocking stop state and the synchronization signal is not transmitted, the radio transmission / reception unit 2 of the slave stations TR2,... Remains in the reception state in order to receive the synchronization signal. If the control unit 1 of the slave stations TR2,... Continues to receive a synchronization signal for a predetermined time (for example, a time corresponding to several cycles of the synchronization signal) or longer, the battery may be consumed significantly. It is desirable to stop the transmission / reception unit 2 to suppress battery consumption.

  By the way, in this embodiment, the operation input reception part 6 of fire alarm TR has the 1st operation part 6a and the 2nd operation part 6b, and when the 1st operation part 6a is operated, the operation input reception part 6 A first alarm stop operation signal is output from the control unit 1 to the control unit 1, and when the second operation unit 6 b is operated, a second alarm stop operation signal is output from the operation input receiving unit 6 to the control unit 1. The control unit 1 that has received the first or second alarm stop operation signal causes the alarm unit 5 to stop sounding the alarm sound regardless of which alarm stop operation signal is received. When the operation signal is received, a wireless signal including the first alarm stop message is transmitted from the wireless transmission / reception unit 2, and when the second alarm stop operation signal is received, the wireless signal including the second alarm stop message is transmitted from the wireless transmission / reception unit 2, respectively. Let

  On the other hand, control of the fire alarm device TR (including both the master station TR1 and the slave stations TR2,...) That has received a radio signal including the first or second alarm stop message transmitted from another fire alarm device TR. When the first alarm stop message is received, the unit 1 causes the alarm unit 5 to stop sounding the alarm, regardless of whether the fire detection unit 4 detects a fire, or the second alarm stop message. When the fire detection unit 4 does not detect a fire, the alarm unit 5 stops the alarm sound.

  Thus, according to the present embodiment, when the first operation unit 6a is operated in any of the fire alarms TR regardless of whether the source is a fire source, the alarm units 5 of all the fire alarms TR notify the user. All fire alarms (alarm sounds) that are (sounding) are stopped all at once, and when the second operation unit 6b is operated in any of the fire alarms TR, all other than the fire alarm TR of the fire source Because the fire alarm (alarm sound) that is notified (sounding) from the alarm unit 5 of the fire alarm device TR stops all at once, the fire alarm that includes all the fire alarm devices TR in conjunction with the fire source It can alternatively be selected whether to stop at all fire alarms TR or at all other fire alarms TR except the fire source. Therefore, if it is unclear whether or not it is a false alarm, the fire alarm device TR of the fire source is identified by operating the second operation unit 6b to stop the fire alarm device TR other than the fire source from reporting the fire alarm. The fire alarm device TR can be visited to confirm the presence or absence of a fire, and if it is confirmed that there is a false alarm, the first operation unit 6a or the second operation of the fire alarm device TR The fire alarm (alarm sound) may be stopped by operating the unit 6b. On the other hand, when it is clear that it is a false alarm, it is possible to stop the fire alarm notification to all the fire alarm devices TR including the fire source by operating the first operation unit 6a. There is no need to go to the place where TR is installed. As a result, it is possible to improve the usability regarding the stop operation of the fire alarm.

  By the way, in recent houses, the ceiling height tends to be high, and when the fire alarm TR is installed on the ceiling, a stepladder, a chair, or the like is required to operate the first operation unit 6a or the second operation unit 6b. Often ends up becoming. Therefore, a main body housing (not shown) in which the control unit 1 other than the operation input receiving unit 6, the wireless transmission / reception unit 2, the antenna 3, the fire detection unit 4, the alarm unit 5, and the battery power source unit 7 are housed, and the operation input reception An operation housing (not shown) in which the unit 6 is accommodated, and an operation signal (first and second) corresponding to an operation input received by the operation input receiving unit 6 by connecting the operation input receiving unit 6 and the control unit 1 If the fire alarm TR is configured with a transmission line (not shown) for transmitting an alarm stop operation signal, etc., the main body housing is installed on the ceiling, and the operation housing is placed on a wall or the like at a position lower than the ceiling. Since it can be installed, there is an advantage that the first operation unit 6a and the second operation unit 6b can be operated without using a stepladder and the operability is improved.

  Also, when transmitting an operation signal via a transmission line, the transmission line must be exposed between the main body housing installed on the ceiling and the operation housing installed on the wall, which is troublesome and aesthetically pleasing. not good. Therefore, if it is configured to transmit the operation signal from the operation housing to the main body housing with a wireless signal using infrared rays or radio waves as a medium instead of connecting with the transmission line, the trouble of constructing the transmission line becomes unnecessary and the appearance is improved. . However, since means for transmitting a wireless signal using infrared or radio waves as a medium can be realized by using a conventionally known technique, illustration and description of a detailed configuration are omitted. In addition, instead of providing the operation input receiving unit 6 having the first operation unit 6a and the second operation unit 6b for each fire alarm TR, the control unit 1 of all the fire alarms TR from one operation input receiving unit 6 It is also possible to adopt a configuration in which an operation signal is transmitted to.

  By the way, the alarm sound stop time limited in the interlocking stop state is not necessarily a fixed time, and may be set to an arbitrary time by using, for example, a dip switch. That is, when the control unit 1 reads the value of the dip switch, the alarm sound stop time corresponding to the read value is set. In this way, since an appropriate alarm sound stop time can be set according to the installation location, installation environment, etc., the usability is further improved.

(Embodiment 2)
As described in the first embodiment, by operating the first operation unit 6a or the second operation unit 6b of any of the fire alarm devices TR, all the fire alarm devices TR or all other fire alarms except the fire source Stopping the alarm sound that the alarm unit 5 of the instrument TR sounds is an effective method for dealing with misinformation and for identifying the fire alarm device TR of the fire source. However, when a fire actually occurs rather than a false alarm, if the alarm sound of the fire alarm device TR is easily stopped, a sleeping person or an elderly person with a long ear may miss the alarm sound. There is.

  Therefore, in the present embodiment, when the control unit 1 of each fire alarm device TR receives the first and second alarm stop messages, the stop permission control that causes the alarm unit 5 to stop sounding the alarm sound, When the second alarm stop message is received, either one of the stop prohibition control that does not stop the alarm unit 5 from sounding the alarm sound is alternatively executed. However, it can be set by the dip switch etc. which the operation input reception part 6 has which control of the control part 1 performs stop permission control or stop prohibition control.

  For example, in the fire alarm device TR installed in an elderly bedroom, the control unit 1 executes stop prohibition control, and in the fire alarm device TR installed in other places, the control unit 1 executes stop permission control. With this setting, it is possible to improve the usability when stopping the fire alarm notification while reducing the possibility that the elderly will miss the alarm sound as described above. In addition, since the structure of the fire alarm device TR in this embodiment is common to Embodiment 1, the same code | symbol is attached | subjected to a common component and illustration and description are abbreviate | omitted.

(Embodiment 3)
When the fire alarm system according to the present invention is installed in a private house with a large number of rooms or a group home where a large number of people live together, only the fire alarm TR installed in an adjacent room is interlocked to generate an alarm sound. If it is made to stop, it is thought that it is easy to use and it is possible to prevent the alarm sound from being missed.

  Therefore, in the present embodiment, each fire alarm device TR has a storage means (not shown) for storing an identification code of the group to which it belongs or an identification code (group number or the like) for identifying another fire alarm device TR belonging to the same group. And when the operation input receiving unit 6 receives an operation input for stopping the fire alarm (when the first operation unit 6a or the second operation unit 6b is operated), and the wireless transmission / reception unit 2 belongs to the same group. When the first or second alarm stop message is received from the fire alarm device TR, the alarm unit 5 stops the alarm sound, and the first or second alarm stop message is transmitted from another fire alarm device TR belonging to another group. Is received so that the alarm unit 5 does not stop the alarm sound. In addition, as a method of setting which group each fire alarm device TR belongs to, a method of setting a group number using a dip switch, or a radio including its own identification code between the fire alarm devices TR There is a method of transmitting and receiving signals and exchanging identification codes between fire alarm devices TR belonging to the same group.

  Thus, when transmitting a radio signal including the first or second alarm stop message from the fire alarm device TR in which the first operation unit 6a or the second operation unit 6b is operated, the control unit of the fire alarm device TR 1 transmits the identification code (group number) of the group to which it belongs together with the alarm stop message, and in the other fire alarm device TR that has received the first or second alarm stop message, the control unit 1 sends the alarm stop message together with the alarm stop message. If the received group number matches the group number to which the user belongs, the alarm unit 5 can be stopped from sounding the alarm sound, and if the group number does not match, the alarm unit 5 can be prevented from sounding the alarm sound. Thus, when an alarm stop message is received from a fire alarm device TR belonging to a different group, the fire alarm notification is not stopped, and when an alarm stop message is received from a fire alarm device TR belonging to the same group, the fire alarm notification is performed. If it is installed in a private house with a large number of rooms or a group home where a large number of people live together as described above, only the fire alarm TR installed in the adjacent room is linked to alarm sound. Can be stopped and usability is improved. In addition, since the structure of the fire alarm device TR in this embodiment is common to Embodiment 1, the same code | symbol is attached | subjected to a common component and illustration and description are abbreviate | omitted.

(A) is a block diagram of the fire alarm device (master station and slave station) according to the first to third embodiments of the present invention, and (b) is a block diagram of an operation input receiving unit provided in the fire alarm device. It is a frame format of the radio signal in the same as above. It is a flowchart for demonstrating the operation | movement which changes to a fire interlocking state from a standby state same as the above. It is a time chart for demonstrating the operation | movement which changes to the interlocking stop state from the interlocking ringing state same as the above. It is a time chart for demonstrating the operation | movement which changes to the interlocking stop state from the interlocking ringing state same as the above. It is a time chart for demonstrating the operation | movement which changes to a standby state from a fire interlocking state same as the above. It is a time chart for demonstrating the operation | movement in a fire interlocking state same as the above. It is a flowchart for demonstrating operation | movement of the master station in a fire interlocking state same as the above.

Explanation of symbols

TR1 Fire alarm (master station)
TR2 Fire alarm (slave station)
1 Control unit (control means)
2 Wireless transmitter / receiver (reception means, transmission means)
4 Fire detection part (fire detection means)
5 Alarm section (alarm means)
6 Operation input reception unit 6 (operation input reception means)
6a 1st operation part 6b 2nd operation part

Claims (6)

A fire alarm system comprising a plurality of fire alarms and transmitting a radio signal using radio waves as a medium between the plurality of fire alarms,
Each fire alarm detects a fire with a fire detecting means for detecting a fire, an alarm means for notifying a fire alarm, a transmitting means for transmitting a wireless signal, a receiving means for receiving a wireless signal, and a fire detecting means. Sometimes the alarm means is notified of the fire alarm and the other fire alarm is notified of the fire alarm by the transmitting means and the wireless signal including the fire alarm message is transmitted from the transmitting means, and the receiving means is transmitted from the other fire alarm device. A control means for notifying the alarm means of a fire alarm when receiving the fire alarm message and an operation input receiving means for accepting an operation input for stopping the fire alarm,
The operation input receiving means has a first operation part and a second operation part, and outputs a first alarm stop operation signal to the control means when the first operation part is operated, and the second operation part operates. Output a second alarm stop operation signal to the control means when
When the control means of each fire alarm device receives the first or second alarm stop operation signal, the fire alarm device stops the fire alarm notification and the other fire alarm device stops the fire alarm notification. Or, when the wireless signal including the second alarm stop message is transmitted from the transmission means and the first alarm stop message is received by the wireless signal received by the reception means, whether or not the fire detection means detects fire. Regardless of this, the alarm means stops the fire alarm notification, and when the second alarm stop message is received, the alarm means stops the fire alarm notification only when the fire detection means does not detect the fire. And fire alarm system.   Each fire alarm is configured to transmit a control signal corresponding to an operation input received by the operation input receiving means, a main body housing that stores other than the operation input receiving means, an operation housing that stores the operation input receiving means, and The fire alarm system according to claim 1, further comprising a transmission line.   Each fire alarm wirelessly transmits an operation signal corresponding to an operation input received by the operation input receiving means, and a main body housing for storing other than the operation input receiving means, an operation housing for storing the operation input receiving means The fire alarm system according to claim 1, further comprising an operation signal transmission means for the operation.   The control means of each fire alarm does not stop the alarm means when the alarm stop message is received, or the stop permission control that stops the alarm means when the alarm stop message is received, or the alarm means when the alarm stop message is received The fire alarm system according to any one of claims 1 to 3, wherein either one of the stop prohibition control is executed alternatively. Each fire alarm has a storage means for storing an identification code of a group to which the fire alarm belongs or an identification code for identifying another fire alarm belonging to the same group,
The control means of each fire alarm device fires to the alarm means when the operation input accepting means accepts the operation input for stopping the fire alarm and when the receiving means receives the alarm stop message from the fire alarm device belonging to the same group. The fire alarm system according to any one of claims 1 to 3, wherein alarm notification is stopped. Each fire alarm has a setting means to set the alarm stop time,
The control means of each fire alarm should start the time limit of the alarm stop time after receiving the fire alarm message by the receiving means, and detect the fire by the fire detection means when the time limit of the alarm stop time ends. For example, let the alarm means notify the fire alarm and send a wireless signal including a fire alarm message for notifying other fire alarms of the fire alarm from the transmitting means, and until the alarm stop time expires. 6. The fire alarm according to claim 1, wherein a radio alarm transmitted from another fire alarm device is received by the receiving means and the fire alarm message is received when the fire alarm message is received. Fire alarm system.

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