JP2016153940A - Warning system - Google Patents

Abstract

An alarm system capable of preventing a communication failure when a light emission timing overlaps with relay transmission in a light alarm device under light emission control and capable of synchronous light emission of a plurality of light alarm devices including a relay destination. When a fire alarm signal is input from a fire receiver 10, a light alarm control device 30 transmits a control message instructing light emission control and confirmation responses from all previously registered transmission destinations. When no message is received, a relay instruction message is transmitted. The light alarm devices 32-1 and 32-2 start the light emission of the light emitting unit when receiving a control message, perform light emission control that repeats light emission with a predetermined light emission period, and received a relay instruction message during the light emission control In this case, a relay control message is generated, and the relay control message is relayed to the light alarm device 32-3 so as to avoid duplication with the light emission of the light emitting unit, and the light alarm devices 32-1 to 32-3 are caused to emit light synchronously. . [Selection] Figure 1

Description

  The present invention provides an alarm system that, when a fire alarm of a fire detector is received by a receiver, notifies the occurrence of a fire by flashing light by wirelessly transmitting a control message from a receiver side to a light alarm device in a warning area. About.

  Conventionally, in buildings such as office buildings, store buildings, hospitals, hotels, etc., an automatic fire alarm system has been used as an alarm system for monitoring the fire and notifying people in the building when a fire occurs. Is installed. In such an automatic fire alarm system, it is common to notify the occurrence of a fire by sound such as a buzzer, a bell, and a message. In addition to this sound notification, display notification using an LED, a red lamp, or the like is also performed as appropriate.

  By the way, in recent years, there has also been proposed an alarm system for notifying the occurrence of a fire by blinking high-luminance white light (flash light) having high visibility along with sound (for example, see Patent Documents 1 to 3). . According to such an alarm system, since the occurrence of a fire is notified not only by sound but also by flashing of strong light, for example, a hearing-impaired person can recognize the occurrence of a disaster early and reliably.

  A wireless alarm system has also been proposed in order to reduce the labor and cost of wiring (for example, see Patent Document 4). The wireless alarm system outputs a fire signal to the repeater via the electrical circuit and receives an alarm command signal (control message) from the repeater when the fire alarm is received by the fire receiver. The light alarm device drives the light emitting unit to emit light after a predetermined delay time Δt after receiving the alarm command signal, and repeats light emission at a predetermined cycle T. In addition, for an optical alarm device installed in a place where radio waves do not reach, a radio wave repeater is provided on the way to relay the alarm command signal.

  When the radio wave repeater receives the alarm command signal from the repeater connected to the fire receiver, the alarm command signal is relayed and transmitted after the period T has elapsed. When the delay time Δt has elapsed, the light emitting unit is driven to emit light, and thereafter light emission is repeated at a period T. As a result, although there is a time lag in the first light emission depending on the presence or absence of relaying, when all the light alarm devices start light emission, synchronized light emission is performed with a period T, and light sensitivity due to light emission at disjoint timing Make it possible to eliminate seizure problems.

Utility Model Registration No. 3113946 JP 2005-165740 A JP 2011-198194 A JP 2014-186430 A

  By the way, in a radio alarm system that performs an optical alarm, the radio wave environment of the alert area to be monitored varies, and the radio wave environment may change depending on the time zone of the day, the season, and the like. For this reason, when the control telegram is wirelessly transmitted from the light alarm control device on the receiver side, the same control telegram is continuously transmitted a plurality of times. In addition, since the wireless light alarm device is battery-driven, intermittent reception is performed to ensure a sufficient battery life.

  In this way, when the optical communication control device continuously transmits a message for a plurality of times and the light alarm device intermittently receives the light control message and controls the light emission, the control message continuously transmitted from the light alarm control device Which control message is effectively received is determined by the timing of the carrier sense performed every intermittent reception cycle performed asynchronously by the optical alarm device, and is predetermined from the reception of the alarm command signal every cycle T as in the past. Even if the light emission unit is controlled to emit light after the delay time Δt, the light emission timing of the light alarm device varies, and there is a problem that light emission synchronization that matches the light emission timing cannot be achieved.

  In addition, with regard to the light alarm device installed at a far place where the radio wave from the light alarm control device on the receiver side does not reach, the light alarm device installed in the meantime has a radio wave relay function, from the light control device However, in this case as well, among the control messages that are continuously relayed and transmitted, which control message is to be received effectively depends on the intermittent reception of the light alarm device at the relay destination. It is determined by the timing of carrier sense performed for each cycle, and the light emission timing of the light alarm device varies. Similarly, there is a problem that light emission synchronization that matches the light emission timing cannot be achieved.

  In addition, the light alarm device that relays the control message may overlap the light emission timing performed every predetermined light emission period during the relay transmission of the control message, and the current consumption of the battery power supply increases due to the light emission driving of the light emitting unit. For this reason, the power supply voltage is lowered, relay transmission becomes unstable, the control telegram becomes garbled, and the light emission timing of the relay destination optical alarm device is not appropriately controlled, which may vary.

  The present invention provides a wireless alarm system capable of preventing a communication failure when light emission timing overlaps during relay transmission of an optical alarm device, and enabling synchronous light emission of a plurality of optical alarm devices including a relay destination. With the goal.

(Alarm system)
The present invention relates to an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, a fire alarm is output, and a fire alarm signal is output. In
When a fire signal is input from the receiver, a control message is sent to instruct light emission control, and a relay instruction message is sent when confirmation response messages from all pre-registered destinations are not received. A light alarm control device,
When a control message is received, light emission control is performed to start light emission of the light emitting unit and repeat light emission with a predetermined light emission period.When a relay instruction message is received during light emission control, a relay control message is generated, and A light alarm device that relays and transmits a relay control message so as to avoid duplication with light emission;
Is provided.

(Suspend message transmission during light emission)
The light alarm device stops the transmission of the relay control message during the light emission period by the light emitting unit.

(Transmission of pause start code and pause end code)
The light alarm device pauses transmission of the relay control message before the light emission period and transmits a predetermined suspension start code, and resumes transmission of the relay control message after transmitting a predetermined suspension end code after the light emission period. To do.

(Send code transmission during flash)
The light alarm device suspends transmission of the relay control message during the light emission period by the light emitting unit and transmits a predetermined suspension code indicating that transmission is suspended. Here, the light alarm device transmits binary 01 repeatedly, all 0s in binary, an inverted value of the parity check code included in the relay control message, or the like as the pause code.

(Transmission of pause code with intermediate value of 4-value FSK)
The light alarm device transmits the relay control message code using the minimum and maximum binary frequencies in the four-value FSK using four different frequencies, and the pause code is an intermediate binary frequency in the four-value FSK. Use to send.

(Continuous transmission and intermittent reception)
The light alarm control device sets a transmission cycle (T0) consisting of a predetermined transmission time (T1) and a transmission suspension time (t2) a plurality of times, and repeats transmission of a control message a plurality of times during each transmission time (T1). In addition, the control message includes the light emission waiting time information (Tsi) for each message from the predetermined position of the message within the predetermined light emission period (Tf) when the control message is received to the start of light emission.
The light alarm device starts light emission of the light emitting unit based on the light emission waiting time information (Tsi) included in the control message received first by intermittent reception, and repeats light emission by the light emission period (Tf). Here, i is an integer such that i = 1, 2, 3,.

(Control message relay)
The light alarm control device transmits the relay instruction message including the relay light emission waiting time information (Tr0) from the end of reception to the start of the next light emission when the relay instruction message is received,
Upon receiving the relay instruction message, the light alarm device under light emission control sets a transmission cycle composed of the transmission time (T1) and the transmission pause time (T2) a plurality of times, and sets the relay control message between each transmission time (T1). Repeating transmission a plurality of times, and if the light emission of the light emitting unit and the relay transmission time do not overlap, the relay light emission waiting time information (Tr0) is corrected in consideration of the relay required time (ΔTi) for each message required for message relay The relay light-emission waiting time information (Tri) is included in the relay control message for relay transmission, and when the light emission of the light emitting unit overlaps with the relay transmission time, the relay light-emission waiting time information (Tr0) is used for the relay required time (ΔTi ) And the relay emission waiting time information (Tri) corrected in consideration of the light emission period (Tw) included in the relay control message after light emission, and relayed,
The light warning device at the relay destination starts the light emission of the light emitting unit based on the corrected relay light emission waiting time information (Tri) included in the relay control message that is first effectively received by intermittent reception, and repeats light emission by the light emission period (Tf). .

(Relay time)
The required relay time (ΔT) is the time from the end of reception of the relay instruction message from the light alarm control device to the end of relay transmission of the relay control message by the light alarm device.

(Details of transit time)
The light alarm device under light emission control that received the relay instruction message is
When the transmission of the relay control message is completed within the first light emission cycle in which the relay instruction message is transmitted, the light emission waiting time information corrected by subtracting the relay required time (ΔTi) for each message from the relay light emission waiting time information (Tr0). (Tri = Tr0−ΔTi) is calculated and included in the relay control message,
When transmission of the relay control message ends within the second and subsequent light emission cycles, relaying is required from the time obtained by adding one or more light emission cycles according to the order of the light emission cycles to which the transmission end timing belongs to the light emission waiting time information. The relay emission waiting time information corrected by subtracting the time (Tri = (Tr0 + n · Tf) −ΔTi) is calculated and included in the relay control message.
When the relay control message is transmitted within the light emission cycle after the light emitting unit emits light, the relay light emission waiting time information (Tri) further corrected by subtracting the light emission period (Tw) from the corrected relay light emission waiting time information (Tri). Is calculated and included in the relay control message.

(Basic effect of alarm system)
The present invention relates to an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, a fire alarm is output, and a fire alarm signal is output. In this case, when a fire signal is input from the receiver, a control telegram for instructing light emission control is transmitted, and when confirmation response telegrams from all pre-registered transmission destinations are not received, relay is performed. Light warning control device that sends an instruction message, and when a control message is received, performs light emission control that starts light emission of the light emitting unit and repeats light emission with a predetermined light emission period, and receives a relay instruction message during light emission control A relay control message is generated and an optical alarm device that relays and transmits the relay control message so as to avoid duplication with the light emission of the light emitting unit is provided. Without causing a communication failure due bit garbled etc. becomes unstable, to allow synchronization emission of light alerts matching the flashing lights of a plurality of optical alarm device by the transmission of the control message with the relay transmission.

  In addition, if relay transmission can be performed normally, even if a plurality of control telegrams relayed from the optical alarm device are received at an appropriate timing according to intermittent reception by the relay destination optical alarm device, from the end of reception of the control telegram By repeating the light emission of the light emitting unit according to the light emission cycle when the light emission waiting time information included in the received message has passed, the light emission start timings of the plurality of light control devices including the relay destination are made to coincide with each other. It is possible to reliably perform the synchronized light emission in which the flashing of the alarm device coincides.

(Effect of suspension of message transmission during light emission)
In addition, since the light alarm device stops the transmission of the relay control message during the light emission period by the light emitting unit, even if the light emission timing comes during the relay transmission, there is no interference with the relay transmission, and the relay transmission is not performed. The transmission of the accompanying control telegram enables synchronized light emission of a light alarm that matches the blinking of light in a plurality of light alarm devices.

(Effects of sending a pause start code and a pause end code)
In addition, the light alarm device pauses transmission of the relay control message before the light emission period and transmits a predetermined suspension start code, and transmits a predetermined suspension end code after the light emission period and then transmits the relay control message. Therefore, the light warning device at the relay destination recognizes the transmission suspension of the relay control message corresponding to the light emission by receiving the suspension start code and the suspension end code, ignores the contents of the message received during that time, It is possible to reliably prevent malfunction of optical control due to a communication error in the relay control message.

(Effects of sending a pause code while flashing)
In addition, the light alarm device pauses transmission of the relay control message during the light emission period by the light emitting unit, and transmits a predetermined pause code indicating that the transmission is suspended, and repeats binary 01 as a pause code. 0 or the inverted value of the parity check code included in the relay control message is transmitted, so that the relay optical alarm device recognizes the suspension of relay transmission of the relay control message by receiving the suspension code. Ignoring the contents of the message received in the meantime, it is possible to reliably prevent malfunction of light control.

  In addition, if carrier sensing is performed by intermittent reception of the relay-destination optical alarm device during transmission of the pause code, switching from intermittent reception to continuous reception is performed, and the relay control message transmitted after the pause code is reliably received. It is possible to perform light control for synchronized light emission.

(Effect of transmission of pause code by intermediate value of 4-value FSK)
In addition, the light alarm device transmits the relay control message code using the minimum and maximum binary frequencies in the 4-value FSK using four different frequencies, and the pause code is an intermediate binary value in the 4-value FSK. Therefore, the pause code received at the intermediate binary frequency of the quaternary FSK is ignored, and the message code received at the minimum and maximum binary frequencies in the quaternary FSK is regarded as valid. By performing the processing, it is possible to prevent malfunction of the light control at the relay destination, and to reliably perform the light control for the synchronized light emission.

(Effects of continuous transmission and intermittent reception)
In addition, the light alarm control device sets a transmission cycle (T0) composed of a predetermined transmission time (T1) and a transmission pause time (T2) a plurality of times, and repeats transmission of a control message a plurality of times during each transmission time. When the control message is received, the light emission waiting time information (Ts) from the predetermined position of the message within the predetermined light emission period (Tf) to the start of light emission is included in the control message and transmitted. Since the emission of the light emitting unit is started based on the light emission waiting time information (Ts) included in the control message received first, and the light emission according to the light emission cycle (Tf) is repeated, a plurality of transmission times with the transmission pause time interposed therebetween By continuously transmitting the control telegram during this time, it is possible to reliably receive the control telegram and perform the optical alarm control by the optical alarm device that performs intermittent reception by carrier sense.

(Effects of relay transmission)
In addition, the optical warning control device registers the identification information of all the optical warning devices that are transmission destinations, and instructs relay transmission when a confirmation message is not received from all transmission destinations by transmitting a control message. When the light alarm device receives a relay instruction message from the light alarm control device during the light emission control, the relay control message is generated and relay-transmitted. If a control telegram is received by a light control device, no unnecessary relay is instructed, and relaying is instructed only when there is a light alarm device that has not received a control telegram. It enables relaying corresponding to the radio wave environment for the installed light alarm device, and can suppress useless relay operations.

(Effect of control message relay)
Also, the light warning control device transmits the relay instruction message including the relay light emission waiting time information (Tr) from the end of reception to the start of the next light emission when the relay instruction message is received, and receives the relay instruction message. The light alarm device under light emission control sets a transmission cycle composed of a transmission time (T1) and a transmission pause time (T2) a plurality of times, and repeats transmission of the relay control message a plurality of times during each transmission time (T1). At the same time, when the light emission of the light emitting unit and the relay transmission time do not overlap, the relay light emission waiting time information (Tr0) corrected by adding the relay required time (ΔTi) for each message required for relaying the message is corrected ( Tri) is included in the relay control message for relay transmission, and when the light emission of the light emitting unit overlaps with the relay transmission time, the relay light emission waiting time information (Tr0) is used for the relay required time (ΔTi) and the light emission period ( Tw ), And relay transmission waiting time information (Tri) corrected by taking into account the relay control message after light emission is relayed, and the light alarm device at the relay destination is included in the relay control message that is first received effectively by intermittent reception. Based on the corrected relay light emission waiting time information (Tri) to be generated, light emission of the light emitting unit is started and light emission is repeated according to the light emission period (Tf). The time until the end of relay transmission of the relay control message by the light alarm device is set so that the light alarm control device transmits the relay instruction message once when the confirmation response message is not received from all the transmission destinations. So, the light alarm device under light emission control that is continuously receiving by receiving the control message by intermittent reception repeatedly transmits multiple relay control messages based on the reception of the relay instruction message By controlling and including the relay required time included in each relay message or the relay light emission waiting time information corrected by taking into account the relay required time and the light emission period, one or more light alarm devices at the relay destination can be Even if the relay control message is received at a different timing according to the reception, the light emission of the light emitting unit according to the light emission cycle at the time when the corrected relay light emission waiting time information included in the received message has elapsed since the end of reception of the control message To repeat the light emission start timing of the relay destination light control device, and at the same time, to match the blinking of the light source alarm device of the relay source that is already under light emission control, even when relaying the control message It is possible to reliably perform the synchronized light emission of the light alarm device.

  Further, by providing the optical alarm device with a relay function, it is not necessary to provide a dedicated relay device, and the system configuration can be simplified and the cost can be reduced.

(Effects of calculating relay time)
In addition, when the light alarm device under light emission control that has received the relay instruction message ends transmission of the relay control message within the first light emission cycle in which the relay instruction message has been transmitted, the message is transmitted from the relay light emission waiting time information (Tr0). The relay emission waiting time information (Tri = Tr0−ΔTi) corrected by subtracting the time required for each relay (ΔTi) is calculated and included in the relay control message, and transmission of the relay control message is completed within the second and subsequent light emission cycles. When the relay light emission waiting time information (Tr0) is added to one or more light emission periods (Tf) corresponding to the order of the light emission periods to which the transmission end timing belongs, the relay required time (ΔTi) for each electronic message is obtained. The subtracted and corrected relay emission waiting time information (Tri = (Tr0 + n · Tf) −ΔTi) is calculated and included in the relay control message, and the relay control message is included in the light emission cycle after the light emitting unit emits light. In the case of transmission, since the corrected relay emission waiting time information (Tri) is calculated by subtracting the emission period (Tw) from the corrected relay emission waiting time information (Tri) and included in the relay control message, the relay instruction message The relay light emission waiting time information (Tri) obtained by correcting the relay light emission waiting time information (Tr0) from the relay required time (ΔTi) or the relay required time (ΔTi) and the light emission period (Tw) is obtained by schedule management prior to transmission of the message. By including the relay control messages with different transmission timings for transmission, it is possible to reliably perform synchronous light emission at the relay destination.

The block diagram which showed embodiment of the warning system which performs optical warning control by radio | wireless communication of a control message | telegram Block diagram showing the functional configuration of the light alarm control device Block diagram showing the functional configuration of the light alarm device Circuit diagram showing control message format Time chart showing light emission control by transmission of control message Time chart showing light emission control when relay control is performed by transmitting a relay instruction message following FIG. Time chart showing comparison between relay operation when relay control message transmission and light emission timing overlap and relay operation to avoid duplication Time chart showing the operation of the first mode in which message transmission is suspended during the light emission period Time chart showing the operation in the second mode for transmitting a pause code during the light emission period Time chart showing transmission operation of telegram code and pause code by 4-value FSK Time chart showing the operation of the third mode in which a pause start code and a pause end code are transmitted before and after the light emission period Flow chart showing control operation of light alarm control device Flow chart showing control operation of light alarm device

[Alarm system]
(Alarm system configuration)
FIG. 1 is a block diagram showing an embodiment of a warning system that performs light warning control by wireless communication of a control message.

  As shown in FIG. 1, the alarm system of the present embodiment is an example of a P-type automatic fire alarm system, and a plurality of sensor lines 12 serving as power supply signal lines are provided from the fire receiver 10 toward a warning area. A plurality of fire detectors 14 are connected by pulling out the line, and a termination device (termination resistor) 16 is connected to the end of the line.

  The fire receiver 10 includes a reception control unit 20, and a line reception unit 22, a display unit 24, an operation unit 25, an alarm unit 26, and a transfer unit 28 are provided for the reception control unit 20.

  The reception control unit 20 is a function realized by executing a program, for example, and uses, as hardware, a computer circuit having a CPU, a memory, various input / output ports, and the like.

  The line receiver 22 supplies a predetermined DC voltage VL, for example, VL = DC 24 volts, as a power supply voltage to the fire detector 14 from a power source built in the fire receiver 10. Further, the line detection unit 22 detects the alarm current flowing through the sensor line 12 when the fire detector 14 detects a fire, and outputs a line current detection signal to the reception control unit 20, and the reception control unit 20 receives the line reception unit 22. The fire alarm is determined by detecting that the line current detection signal from the terminal becomes equal to or higher than a predetermined fire alarm level.

  In addition, a predetermined line monitoring current determined by the terminating device 16 flows in the sensor line 12 in the normal monitoring state (non-reporting state). When the sensor line 12 is disconnected, the line monitoring current does not flow, and the reception control unit 20 detects a disconnection failure by detecting that the line current detection signal from the line receiver 22 has dropped below a predetermined value.

  The display unit 24 is provided with a fire representative lamp, a district display lamp, and other various display lamps and a liquid crystal display necessary for fire monitoring. The operation unit 25 is provided with various switches necessary for fire monitoring, such as a main sound stop switch, a district sound stop switch, and a transfer stop switch. The alarm unit 26 includes a buzzer and a speaker, and outputs an acoustic alarm and a message alarm. The transfer unit 28 outputs a fire transfer signal to other devices.

(Light alarm control function)
The configuration and function of such an automatic fire alarm system are the same as those of the conventional system. In addition, in this embodiment, the light alarm control device 30 is arranged outside the fire receiver 10 and moved. A report signal line is connected from the report unit 28, and wireless light alarm devices 32-1 to 32-3 are arranged in a warning area. In the following description, when there is no need to distinguish between the light alarm devices 32-1 to 32-3, the light alarm device 32 may be referred to.

  When the light alarm control device 30 receives a fire report signal from the message transfer unit 28 of the fire receiver 10, the light alarm control device 30 generates a control message for instructing the light alarm control and wirelessly transmits it to the light alarm devices 32-1 to 32-3. Then, light alarm control is performed. The transmission of the control message by the light alarm control device 30 corresponds to the intermittent reception of the light alarm devices 32-1 to 32-3, and a transmission cycle T0 composed of a predetermined transmission time T1 and a transmission pause time T2 is set to a plurality of times, for example 3 The control message is continuously transmitted a plurality of times during each transmission time T1.

  The light alarm devices 32-1 to 32-3 receive the control telegram transmitted from the light alarm control device 30, and have predetermined light intensity corresponding to the installation location by light emission control of the light emitting unit using a high-intensity LED, a flashlight, or the like. Flashes white light or red light with a light alarm to notify the occurrence of a fire with the flashing light.

  The flashing frequency of the light alarm by the light alarm device 32 is 0.5 Hz or more and 2 Hz or less, that is, the light emission period Tf is 0.5 or more and 2.0 seconds or less, and the light emission pulse width Tw is 0.2 seconds (200 ms). I do not exceed it.

  Further, the optical alarm device 32 performs intermittent reception for performing carrier sense at every predetermined intermittent reception cycle. When the transmission radio wave from the optical alarm control device 30 is detected by carrier sense, the optical alarm device 32 is switched to continuous reception. The control message transmitted from 30 is received, the light emission control of the light emitting unit is started based on the content of the received control message, and the light alarm is notified by repeating the light emission control at a predetermined light emission period Tf.

  Moreover, ID used as specific identification information is previously allocated to the light warning control device 30 and the light warning devices 32-1 to 32-3.

  In addition, the light warning control device 30 instructs relay transmission when the control response message ACK is not received from the light warning devices 32 that are all transmission destinations specified by the registered IDs by transmitting the control message. Generate and send a relay instruction message.

  In addition, the light alarm device 32 that is controlling light emission by receiving a control message generates and transmits a relay control message when receiving a relay instruction message from the light alarm control device 30, but emits light during transmission of the relay control message. When the timing overlaps, the relay control message is relayed and transmitted so as to avoid the overlap with the light emission timing.

(Configuration of light alarm control device)
FIG. 2 is a block diagram showing a functional configuration of the light alarm control device provided in FIG. As shown in FIG. 2, the light alarm control device 30 includes a control unit 34, a transmission input unit 36 to which a transmission signal line is connected and a communication unit 38 to which an antenna 40 is connected, and a power source from the fire receiver 10. Or it operates with a dedicated power supply.

  The control unit 34 is a function realized by, for example, execution of a program, and uses, as hardware, a computer circuit having a CPU, a memory, various input / output ports, and the like. The transfer input unit 36 is a fire transfer output from the transfer unit 28 when the reception control unit 20 of the fire receiver 10 shown in FIG. 1 detects a fire alarm of the fire detector 14 and issues a fire alarm. An input of an information signal is detected, and a fire signal is output to the control unit 34.

  The communication unit 40 transmits and receives messages to and from the light alarm device 32 installed in the alert area. For example, in the case of Japan, the communication unit 38 performs wireless communication according to the standard of a specific low-power wireless station in the 400 MHz band, and has 48 channels having a band of 12.5 KHz from 426.2500 MHz to 426.8375 MHz. Either of the above can be used.

  The modulation method of the communication unit 38 is, for example, 4-value FSK (4-value frequency shift keying). The quaternary FSK assigns codes 0, 1, 2, and 3 to the four shift frequencies of the shift frequencies -f, -f / 3, + f / 3, and + f. In this embodiment, the shift frequency is assigned to bit 0 of the message code. The minimum value -f is assigned, and the maximum shift frequency value + f is assigned to bit 1.

  Prior to the start of operation of the alarm system, the controller 34 registers ID1 to ID3 in advance as identification information of the optical alarm devices 32-1 to 32-3 that are communication destinations in its own memory.

  Moreover, the control part 34 performs control which produces | generates the control message | telegram for performing light control, and instruct | indicates and transmits to the communication part 38, when the input of the fire signal from the transfer input part 36 is detected.

  Here, the control message transmitted from the light warning control device has a signal format shown in FIG. 3, for example. As shown in FIG. 3, the control message includes a start code, a transmission source ID, a communication control code, control contents, light control time information, and a checksum. Further, the size of the control message is about 100 bits.

  Further, when detecting a fire signal, the control unit 34 sets a transmission cycle T0 including a predetermined transmission time T1 and a transmission suspension time T2 a plurality of times, for example, three times, and transmits a control message during each transmission time T1. Is repeated a plurality of times, for example, transmission of four control messages D1 to D4, D5 to D8, and D9 to D12 in three times, and the light emission period when the control alarm messages D1 to D12 are received on the light alarm device 32 side A predetermined position of the message in Tf, for example, the light emission waiting time information Ts1 to Ts12 from the end of the message reception to the light emission start is set in the light control time information of each control message D1 to D12, and the light alarm device is transmitted. In 32, light emission of the light emitting unit is started by any one of the light emission waiting time information Ts1 to Ts12 included in the received control message, and light emission with the light emission period Tf is repeated. Hereinafter, when it is not necessary to distinguish the light emission waiting time information Ts1 to Ts12, the light emission waiting time information Ts or Tsi may be used. Here, i is an integer of i = 1, 2, 3,... N indicating the order or number of messages.

  In addition, when the control unit 34 determines that the confirmation response message ACK is not received from all the transmission destinations for the transmission of the control message by comparing the registration ID and the transmission source ID of the confirmation response message, the control unit 34 performs the relay transmission. The relay instruction message R to be instructed is controlled to be transmitted, and the light alarm device 32 under the light emission control that has received this is generated and relay-transmitted.

  In addition, the control unit 34 instructs the communication unit 38 to transmit a periodic notification message every predetermined periodic notification time, and determines that it is normal when receiving an acknowledgment response message ACK from all the light alarm devices 32, When there is a light alarm device 32 that cannot obtain the confirmation response message ACK, control is performed to output a failure alarm. In addition, when there is the optical warning device 32 in which the confirmation response message ACK cannot be obtained for the periodic notification message, the control unit 34 performs control to transmit the periodic instruction relay instruction message instructing the relay transmission, and includes the relay transmission. By transmitting the periodic notification message, it is possible to receive confirmation response messages ACK from all the light alarm devices 32.

  Such a control function of the light alarm control device 30 will be clarified in the following description with reference to FIGS. 5 and 6.

(Configuration of light alarm device)
FIG. 4 is a block diagram showing a functional configuration of the light alarm device provided in FIG. As shown in FIG. 4, the light alarm device 32 includes a control unit 42, a communication unit 44 to which an antenna 46 is connected, and a light emitting unit 48, and operates with a battery power source (not shown).

  The control unit 42 is a function realized by, for example, execution of a program, and uses, as hardware, a computer circuit including a CPU, a memory, various input / output ports, and the like.

  The communication unit 44 transmits / receives a telegram to / from the light warning device 32 installed in the warning area, and controls other light warning devices installed in a place where the radio wave from the light warning control device 30 does not reach. Performs relay transmission of messages. In the case of Japan, the communication unit 44 performs wireless communication in accordance with the standard of a specific low power wireless station in the 400 MHz band, for example. Further, the modulation method of the communication unit 44 is assumed to be 4-level FSK similarly to the communication unit 38 of the light alarm control device 30 of FIG.

  The communication unit 44 performs intermittent reception in the normal monitoring state. The intermittent reception cycle by the communication unit 44 is set to a predetermined cycle that is shorter than the transmission time T1 by the communication unit 38 of the light alarm control device 30 in FIG. 2, and carrier sense is performed at each intermittent reception cycle. If possible, it is possible to receive a message from the light alarm control device 30 by switching to continuous reception.

  The light emitting unit 48 is provided with a high-brightness LED, a flashlight, and the like and a drive circuit thereof. When receiving a light emission instruction from the control unit 42, a predetermined light emission cycle Tf, for example, Tf = 2 seconds, for example, Tw = Repeated blinking for a light emission period of 200 milliseconds.

  When the control unit 42 detects the reception of the control message from the light alarm control device 30 via the communication unit 44, the control unit 42 acquires the light emission waiting time information Ts set as the light control time information in the control message, and the control message When the timer reaches the light emission waiting time information Ts, control is performed to instruct the light emitting unit 48 to perform light emission driving, and the light emitting unit 48 is repeatedly driven for light emission every light emission cycle Tf. An operation of notifying a light alarm by flashing light is performed.

  When the control unit 42 receives the control message and starts the light emission control, the control unit 42 controls the communication unit 44 to transmit the confirmation response message ACK. Here, the transmission timing of the confirmation response message ACK has a different delay time corresponding to the ID of the light alarm device 32 and the like, and collision of confirmation response messages ACK from a plurality of light alarm devices 32 can be avoided. .

  When the control unit 42 detects reception of the relay instruction message RC from the light alarm control device 30 via the communication unit 44 during the light emission control based on the reception of the control message, the control unit 42 instructs the transmission unit 44 to transmit. A transmission cycle T0 composed of time T1 and transmission suspension time T2 is set, for example, three times, and transmission of the relay control message R is repeated, for example, four times during each transmission time T1, and a light emission waiting time obtained from the relay instruction message RC The relay light-emission waiting time information Tri, which is corrected in consideration of the relay required time ΔTi for each message required for relaying the message, is included in the relay control message R for relay transmission, and the relay destination light alarm device 32 is controlled. In addition, light emission is started based on the relay light emission waiting time information Tri included in the relay control message R that has been effectively received first by intermittent reception, and light emission with the light emission period Tf is repeated.

  Here, the relay required time ΔTi of the light alarm device 32 is the time from the end of reception of the relay instruction message RC from the light alarm control device 30 to the end of relay transmission of the relay control message R by the light alarm device 32, and the relay control message Each R has a different time.

In addition, when the light emission timing of the light emitting unit 48 overlaps during transmission of the relay control message, the control unit 42 performs control to relay the relay control message so as to avoid overlap with the light emission of the light emitting unit 48. For relay transmission control to avoid duplication with the light emission timing,
(1) First mode in which message transmission is suspended during light emission (2) Second mode in which a suspension code is transmitted during light emission (3) There is a third mode in which a pause start code and a pause end code are transmitted before and after light emission, Either mode is adopted as necessary.

  Moreover, the control part 42 performs control which transmits confirmation response message | telegram ACK, when reception of the regular alert message from the light warning control apparatus 30 is detected via the communication part 44. FIG. In addition, when the control unit 42 detects reception of the relay instruction message of the periodic notification from the light alarm control device 30 via the communication unit 44, the control unit 42 instructs the communication unit 44 to include the transmission time T1 and the transmission suspension time T2. The transmission cycle T0 is set, for example, three times, and the relay control message is transmitted four times for the periodic notification during each transmission time T1, for example, and the periodic response confirmation response message ACK is received from the relay destination. In the case, control is performed to relay this to the light alarm control device 30.

  The control functions of the light alarm control device 30 and the light alarm device 32 will be clarified in the following description with reference to FIGS. 5 and 6.

[Light alarm control by alarm system]
FIG. 5 is a time chart showing light emission control by transmission of a control message, FIG. 5 (A) shows a fire alarm, FIG. 5 (B) shows message transmission by a light alarm control device, and FIG. ) Shows light emission control of the light alarm device, and FIG. 5D partially shows relay control of the light alarm device.

  FIG. 6 is a time chart showing light emission control when relay control is performed by transmitting a relay instruction message following FIG. 5, FIG. 6 (A) shows a fire alarm, and FIG. ) Shows the message transmission by the light alarm control device, FIG. 6C shows the light emission control of the light alarm device, FIG. 6D shows the relay control of the light alarm device, and FIG. 6E shows the relay destination. The light emission control at is shown.

  Further, FIG. 7 is a time chart showing a comparison between the relay operation when the transmission of the relay control message and the light emission timing overlap and the relay operation for avoiding the overlap, and FIG. 7B shows the light alarm control device. 7 (C) shows relay control of the light alarm device performed without considering the overlap with the light emission timing, and FIG. 7 (D) shows the light alarm performed with consideration for the overlap with the light emission timing. The relay control of the device is shown.

(Light alarm control by transmission of control message)
If a fire alarm is detected by the fire receiver 10 at time t1 in FIG. 5A and a fire alarm is output, a fire alarm signal from the alarm unit 28 is given to the light alarm controller 30; The control message transmission operation starts at time t2 in FIG.

  In the transmission operation of the light alarm control device 30, a transmission cycle T0 that is a combination of the transmission time T1 and the transmission suspension time T2 is set three times, and during each transmission time T1, control messages D1 to D4, D5 to D8, D9 to D12 are repeatedly transmitted.

  Taking the message transmission of the first transmission time T1 as an example, each of the control messages D1 to D4 includes the light emission waiting time information Ts1 to Ts4 as the light emission control time information. Taking the head control message D1 as an example, the light emission waiting time information Ts1 is the time from the transmission end time t3 of the control message D1 to the time t7 at which the light alarm device 32 of the transmission destination in FIG. It becomes. Similarly, the remaining control messages D2 to D4 include the light emission waiting time information Ts2 to Ts4, and the transmission time (T1 / 4) is shortened by one transmission time (T1 / 4) from the first light emission waiting time information Ts1. Become.

  Specifically, if the light emission waiting time information Ts1 from the end of transmission of the head control message D1 to the start of light emission is determined in advance, the remaining light emission waiting time information Ts2 to Ts4 is uniquely determined.

  The optical alarm device 32 that receives the control messages D1 to D4 performs carrier sense by intermittent reception. For example, which of the control messages D1 to D4 to be transmitted at the first transmission time T1 is received at the timing of carrier sense. Dependent. However, when any of the control messages D1 to D4 is received, the time when the light emission waiting time information Ts1 to Ts4 has elapsed since the end of each message reception is the same time t7, and the light emission control is started at time t7.

  In addition, the control messages D1 to D4 from the light alarm control device 30 are received by the light alarm devices 32-1 and 32-2 shown in FIG. 1, and even if the reception of the control messages D1 to D4 is different, The light emission timing is the same time t7, and therefore, synchronous light emission in which the flashing of light of the light alarm devices 32-1 and 32-2 matches can be performed.

  The same applies to the messages D5 to D8 and D9 to D12 transmitted at the second and third transmission times T1.

(Light alarm control by telegram relay)
When the transmission of the control messages D1 to D12 is completed three times in FIG. 5, the confirmation response message ACK is received from the light alarm device 32 from time t8. The ID of the light alarm device 32 obtained by receiving this confirmation response message ACK is collated with the ID of the transmission destination registered in advance, and it is confirmed that no confirmation response message ACK is obtained from all the light alarm devices 32. When it is determined, the relay instruction message RC is transmitted at time t9.

  For example, when the confirmation response message ACK of the light alarm devices 32-1 and 32-2 in FIG. 1 is obtained, but the confirmation response message ACK of the light alarm device 32-3 arranged at a remote location is not obtained. It is.

  In the relay instruction message RC transmitted from the light alarm control device 30, the relay light emission waiting time information Tr0 that is the time from the transmission end time t10 of the relay instruction message RC to the start time t13 of the next light emission cycle Tf that is currently under light emission control. Send including The subsequent operation will be described with reference to FIG.

  As shown in FIG. 6B, the relay instruction telegram RC that has started transmission at time t9 is currently being controlled by the light alarm devices 32-1 and 32-2 in FIG. The transmission of the relay control message R is started after a desired operation time necessary for the relay control from the reception end of the relay instruction message RC.

  As shown in FIG. 6D, the transmission of this relay control message is also performed by setting the transmission cycle T0, which is the sum of the transmission time T1 and the transmission suspension time T2, three times, and the relay control message R1 during each transmission time T1. To R4, R5 to R8, and R9 to R12 are repeatedly transmitted.

  Here, among the relay control messages R1 to R4 transmitted at the first transmission time T1, the relay control messages R1 to R3 prior to the time t3 that is the light emission timing include the relay light emission waiting obtained from the relay instruction message RC. The time information Tr0 is transmitted including the relay light emission waiting time information Tr1 to Tr3 corrected in consideration of the respective relay required times ΔT1 to ΔT3. Further, in the relay control message R4 after the time t3 as the light emission timing, the relay light emission obtained by correcting the relay light emission waiting time information Tr0 obtained from the relay instruction message RC in consideration of the relay required time ΔT4 and the light emission period Tw. It is transmitted including the waiting time information Tr4.

  In this respect, the relay control messages R5 to R8 transmitted at the second transmission time T1 and the relay control messages R9 to R12 transmitted at the third transmission time T1 are also before or after the times t15 and t16 which are the light emission timings. Thus, the relay light emission waiting time information Tr5 to Tr8 and Tr9 to Tr12 obtained in the same manner as the first relay control messages R1 to R4 are transmitted.

(Relay control without considering duplication with light emission timing)
In the relay transmission of the relay control messages D1 to D12 in FIG. 6D, the calculation of the relay light emission waiting time information Tr1 to Tr12 will be described when the overlap with the light emission timings at times t13, t15, and t16 is not considered.

First, for example, taking the first relay control message R1 as an example, the required transmission time ΔTi is the time ΔT1 from the reception end time t10 of the relay instruction message RC to the transmission end time t11 of the relay control message R1, and the relay control message R1 The relay light emission waiting time information Tr1, which is the time from the transmission end time t11 of R1 to the next light emission time t13 during the light emission control,
Tr1 = Tr0−ΔT1
It is obtained as

Similarly, the relay control message R2 before the next light emission time t13 is obtained as in the following equation.
Tr2 = Tr0−ΔT2
Since the end time t13 of the next relay control message R3 coincides with the light emission time, and the light emission control cannot be performed in this case, the relay light emission waiting time information Tr0 is shifted by the light emission period Tf to (Tr0 + Tf), and the relay is started. The relay light emission waiting time information Tr3 is obtained by the following equation by subtracting the required time ΔT3.
Tr3 = (Tr0 + Tf) −ΔT3 = Tf

In the same manner, when the relay light emission waiting time information Tr4 to Tr12 is obtained for the relay control messages R4 to R12 in the same manner, it is as follows.
Tr4 = (Tr0 + Tf) −ΔT4
Tr5 = (Tr0 + Tf) −ΔT5
Tr6 = (Tr0 + 2Tf) −ΔT6 = Tf
Tr7 = (Tr0 + 2Tf) −ΔT7
Tr8 = (Tr0 + 2Tf) −ΔT8
Tr9 = (Tr0 + 3Tf) −ΔT9 = Tf
Tr10 = (Tr0 + 3Tf) −ΔT10
Tr11 = (Tr0 + 3Tf) −ΔT11
Tr12 = (Tr0 + 3Tf) −ΔT12

  Such relay light emission waiting time information Tr1 to Tr12 can be uniquely determined because the light emission time is determined by the light emission period Tf of the light alarm device 32 that is under light emission control.

(Relay control taking into account duplication with light emission timing)
Among the relay control messages R1 to R12 shown in FIG. 6D, the light emission timing of FIG. 6C overlaps with the relay messages R4, R7, and R10 at times t13, t15, and t16.

  The overlap between the relay control message and the light emission timing is shown in FIGS. 7C and 7D with the time axis enlarged. That is, the relay control message D4 that started transmission at time t13, which is the end of the first transmission time T1, overlaps with the light emission in the light emission period Tw that also started at time t13. Due to the increase in current consumption, the transmission operation becomes unstable, causing communication failure such as bit corruption.

  Therefore, in this embodiment, as shown in FIG. 7D, for example, in order to avoid duplication with light emission over the light emission period Tw at time t13, relaying is transmitted after time t13, which is the light emission timing. The transmission time of the control message R4 is shifted by the light emission period Tw. This is the same for the second and third transmission times of the message transmission. In the second transmission time, the relay control messages R7 and R8 after the time t15 are transmitted while being shifted by the light emission period Tw, and the third time. In the transmission time, relay control messages R10 to R12 after time t16 are transmitted while being shifted by the light emission period Tw.

  Therefore, when the relay control messages R1 to R12 are transmitted so as to avoid duplication with the light emission timing as shown in FIG. 7E, the relay light emission waiting time information Tr1 to Tr12 included in the relay control messages R1 to R12 is become that way.

Tr1 = Tr0−ΔT1
Tr2 = Tr0−ΔT2
Tr3 = (Tr0 + Tf) −ΔT3 = Tf
Tr4 = (Tr0 + Tf) − (ΔT4 + Tw)
Tr5 = (Tr0 + Tf) −ΔT5
Tr6 = (Tr0 + 2Tf) −ΔT6 = Tf
Tr7 = (Tr0 + 2Tf) − (ΔT7 + Tw)
Tr8 = (Tr0 + 2Tf) − (ΔT8 + Tw)
Tr9 = (Tr0 + 3Tf) −ΔT9 = Tf
Tr10 = (Tr0 + 3Tf) − (ΔT10 + Tw)
Tr11 = (Tr0 + 3Tf) − (ΔT11 + Tw)
Tr12 = (Tr0 + 3Tf) − (ΔT12 + Tw)

  That is, the relay light-emission waiting time information Tr4, Tr7, Tr8, Tr10-Tr12 of the relay control messages R4, R7, R8, R10 to R12 shifted to avoid duplication with the light emission timing is overlapped with the light emission timing. Correction is made so as to be shorter by the light emission period Tw than the time when no consideration is given.

  The relay control messages R1 to R12 relayed and transmitted by the light alarm device 32-1 in FIG. 1 in this way are received by the light alarm device 32-3, for example, any reception of the first relay control messages R1 to R4. Even if there is, the light emission timing is the same time t17. Therefore, the synchronized light emission in which the flashing of the light of the light alarm devices 32-1 and 32-2 already under light emission control coincides is also performed at the relay destination light alarm device 32-3. be able to.

(Light emission waiting time information)
In the above embodiment, the light emission waiting time information Tsi is set to the real time (for example, milliseconds), but the number of bits at the bit rate (bps) used in the alarm system may be used as the light emission waiting time information.

  In addition, when n messages having a message length Td are continuously transmitted (n is an integer indicating n = 1, 2, 3,... Indicating the number of messages), the n portion indicating the number of messages is information. It is also good.

  In addition, when n messages having a message length Td are continuously transmitted and the time Td × (nm) from the end of the m-th message transmission currently being transmitted to the end of the message transmission, the message currently being transmitted is The portion m shown may be used as the light emission waiting time information.

  Alternatively, after the transmission of n messages, the light emission waiting time information such as light emission after a predetermined time Tsfix elapses may be used.

  Furthermore, the light emission waiting time information transmitted by a message and a value obtained by adding or subtracting a predetermined time Tsfix may be used as the light emission waiting time information. The same applies to the relay light emission waiting time information Tri.

(Eliminating duplication of light emission and relay transmission in the first mode)
FIG. 8 is a time chart showing the operation of the first mode in which the transmission of the message is suspended during the light emission period, FIG. 8A shows the light emission timing, and FIG. 8B shows the transmission of the relay control message. .

  As shown in FIG. 8, in the first operation mode, for example, during transmission of a relay control message composed of 8-bit message codes A to G, light emission is started at the timing t1 when transmission of the message code C ends. Then, transmission of the message code is suspended during the light emission period Tw up to time t2, and when the light emission ends at time t2, transmission of the remaining message codes D to G is resumed.

  As described above, in the first operation mode, transmission of the relay control message is suspended for a predetermined time including the light emission period Tw by the light emitting unit (hereinafter, the same applies to the second and third modes). Even when the light emission timing arrives, interference with relay transmission does not occur, and the transmission of a control telegram accompanied by relay transmission enables synchronized light emission of a light alarm that matches the blinking of light in a plurality of light alarm devices.

(Avoiding duplication of light emission and relay transmission in the second mode)
FIG. 9 is a time chart showing the operation of the second mode in which the pause code is transmitted during the light emission period. FIG. 9A shows the light emission timing, and FIG. 9B shows the transmission of the relay control message. .

  As shown in FIG. 9, in the second operation mode, for example, during transmission of a relay control message composed of 8-bit message codes A to G, light emission is started at the timing t1 when transmission of the message code C is completed. Then, during the light emission period Tw up to time t2, a predetermined pause code 50 that is not used for the message code is transmitted, and when the light emission ends at time t2, transmission of the pause code 50 is stopped and remains. Message codes D to G are transmitted.

  As a pause code to be transmitted during the light emission period Tw, for example, a binary pause code “01010101”, a pause code “00000000” that is all 0 in binary, or an inversion of a parity check code included in a relay control message Send value. Of course, any other special code may be used as the pause code.

  As described above, in the second mode, the suspension code 50 is transmitted during the light emission period Tw. Therefore, the relay optical alert device 32 recognizes the suspension of relay transmission of the relay control message by receiving the suspension code 50. Thus, the contents of the message received during that time are ignored, and the malfunction of the light control can be surely prevented.

  If carrier sensing is performed by intermittent reception of the relay optical warning device 32 during transmission of the pause code 50, switching from intermittent reception to continuous reception is performed, and the relay control message code transmitted following the pause code 50 is surely confirmed. It is possible to perform light control that receives the light and generates synchronized light emission.

(Transmission of pause code by 4-level FSK)
FIG. 10 is a time chart showing the transmission operation of the telegram code and the pause code by 4-value FSK.

  The communication unit 44 of the light alarm device 32 shown in FIG. 4 performs modulation / demodulation by four-value FSK. As shown in FIG. 10, the four-value FSK has shift frequencies −f, −f / 3, + f / 3, Codes 0, 1, 2, and 3 are assigned to four shift frequencies of + f, a shift frequency minimum value −f is assigned to bit 0 of the telegram code, and a shift frequency maximum value + f is assigned to bit 1.

  On the other hand, one intermediate value −f / 3 of the shift frequency is assigned to bit 0 of the pause code 50 transmitted during the light emission period Tw, and the other intermediate value + f / 3 of the shift frequency is assigned to bit 1 to obtain an intermediate binary value. The pause code 50 is transmitted using the shift frequencies −f / 3 and + f / 3.

  Since the pause code 50 is transmitted at the intermediate binary frequency of the quaternary FSK in this way, the optical alarm device 32 as the relay destination receives the demodulated code of the intermediate binary of the quaternary FSK and demodulates it. 50 is ignored, and the message code demodulated by receiving the minimum and maximum binary frequencies in the 4-level FSK is processed as valid, so that it is not affected by the light emitting operation of the light alarm device 32 as a relay source. It is possible to perform the light control in which the relay control message is reliably received and the synchronous light emission is performed.

(Elimination of overlap between light emission and relay transmission in the third mode)
FIG. 11 is a time chart showing the operation of the third mode in which a pause start code and a pause end code are transmitted before and after the light emission period. FIG. 11A shows the light emission timing, and FIG. 11B shows the relay control. Indicates transmission of a message.

  As shown in FIG. 11, in the third operation mode, for example, when transmission start of a relay control message composed of 8-bit message codes A to G is scheduled to start from the emission cycle Tf at the timing of time t1. Before the start of light emission at time t1, a pause start code 60 is transmitted. During the light emission period Tw from time t1 to t2, the transmission of the message is paused. When the light emission ends at time t2, a pause end code 70 is transmitted. Then, for example, the telegram codes A to C are transmitted before the suspension start code 60, and the remaining telegram codes D to G are transmitted after the suspension end code 70.

  As described above, in the third mode, transmission of the relay control message is suspended before the light emission period Tw and a predetermined suspension start code 60 is transmitted, and relay control is performed after the suspension end code 70 is transmitted after the light emission period Tw. Since the transmission of the electronic message is resumed, the relay-destination light alarm device 32 recognizes the transmission suspension of the relay control message that overlaps the light emission timing by receiving the suspension start code 60 and the suspension end code 70, and receives it during that time. Ignore the contents of the message, and make it possible to reliably prevent malfunction of light control.

  In the third mode, the pause code as shown in the second mode may be transmitted between the pause start code and the pause end code, instead of pausing the message transmission.

(Control operation of light alarm control device)
FIG. 12 is a flowchart showing the control operation of the light alarm control device. As shown in FIG. 12, when the control unit 34 of the light alarm control device 30 in FIG. 2 detects the reception of the fire report signal from the fire receiver 10 in step S1, the process proceeds to step S2 and the light emission waiting time information Ts1. Control messages D1 to D4 including ~ T4 as light emission control time information are generated, and the control messages D1 to D4 are repeatedly transmitted, for example, divided into three transmission times T1.

  Then, it progresses to step S3, receives the confirmation response message | telegram ACK from the light alarm apparatus 32, and when not having received all the confirmation response message | telegram ACK, it progresses to step S5 and includes the relay light emission waiting time information Tr at that time A relay instruction message RC is transmitted.

(Control action of light alarm device)
FIG. 13 is a flowchart showing the control operation of the light alarm device. As shown in FIG. 13, when the control unit 42 provided in the light alarm device 32 of FIG. 4 detects the arrival of the intermittent reception cycle in step S11, the control unit 42 proceeds to step S12 to determine the presence or absence of carrier sense, and performs carrier sense. If it discriminate | determines, it will progress to step S13 and will switch from intermittent reception operation | movement to continuous reception operation | movement.

  Subsequently, when reception of a control message is detected in step S14, the process proceeds to step S15, and light emission control for repeating light emission based on the light emission period Tf is started based on the light emission waiting time information Ts included in the received control message.

  Subsequently, in step S16, the confirmation response message ACK is transmitted, and if it is detected in step S17 that the relay instruction message has been received, the process proceeds to step S18. If it is determined that there is no overlap between the relay transmission and the light emission timing, the process proceeds to step S19. Then, the relay control message R including the relay light emission waiting time information Tr corrected by the relay required time ΔT is generated, and the relay control message R including the relay light emission waiting time information Tr is relayed and transmitted in step S20, and the relay destination optical alarm device In 32, the flashing of the light synchronized with the other light alarm device 32, that is, the light alarm is notified by the synchronized light emission.

  Subsequently, in step S21, if it is not the end of transmission of the relay control message that is divided into three transmission times and continuously performed four times, the process returns to step S18. The relay control message R including the relay light emission waiting time information Tr corrected by the relay required time ΔT and the light emission period Tw is generated, and the process proceeds to step S22. For example, in the first mode, transmission is suspended during the light emission period Tw. And repeats the processing of steps S18 to S23 until relay transmission of all relay control messages is determined to be relay transmission in step S21.

[Modification of the present invention]
In the above embodiment, a P-type fire receiver that monitors a fire in units of sensor lines is taken as an example. However, an R-type that monitors a fire in units of addresses by connecting a fire detector with an address set to a transmission line. It may be a fire receiver.

  The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire receiver 12: Sensor line 14: Fire detector 16: Termination device 20: Reception control unit 22: Line reception unit 24: Display unit 25: Operation unit 26: Alarm unit 28: Transfer unit 30: Light alarm Control device 32: Light alarm device 34, 42: Control unit 36: Transfer input unit 38, 44: Communication unit 48: Light emitting unit 50: Pause code 60: Pause start code 70: Pause end code

Claims (10)

In an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, a fire alarm is output and a fire alarm signal is output. And
When a fire report signal is input from the receiver, a control message for instructing light emission control is transmitted, and a relay instruction message is transmitted when confirmation response messages from all the destinations registered in advance are not received. A light alarm control device to transmit,
When the control message is received, light emission control is performed to start light emission of the light emitting unit and repeat light emission with a predetermined light emission period, and when the relay instruction message is received during the light emission control, a relay control message is generated, A light alarm device that relays and transmits the relay control message so as to avoid duplication with light emission of the light emitting unit;
An alarm system characterized by providing.
The alarm system according to claim 1, wherein the light alarm device pauses transmission of the relay control message during a light emission period of the light emitting unit.
3. The alarm system according to claim 2, wherein the light alarm device stops transmission of the relay control message and transmits a predetermined pause start code before the light emission period, and transmits a predetermined pause start code after the light emission period. An alarm system, wherein transmission of the relay control message is resumed after transmitting a suspension end code.
2. The alarm system according to claim 1, wherein the light alarm device stops transmission of the relay control message during a light emission period by the light emitting unit and transmits a predetermined suspension code indicating that transmission is suspended. And alarm system.
5. The alarm system according to claim 4, wherein the optical alarm device transmits binary 01, binary 0, all 0s, and an inverted value of a parity check code included in the relay control message as the pause code. Alarm system characterized by doing.
6. The alarm system according to claim 5, wherein the light alarm device transmits the relay control message code using the minimum and maximum binary frequencies in four-value FSK using four different frequencies. The alarm system transmits the pause code using an intermediate binary frequency in the 4-level FSK.
The alarm system according to claim 1, wherein
The light alarm control device sets a transmission cycle (T0) composed of a predetermined transmission time (T1) and a transmission suspension time (t2) a plurality of times, and repeats transmission of a control message a plurality of times during each transmission time. , Including the light-emission waiting time information (Tsi) for each telegram from the predetermined position of the telegram within the predetermined light-emission cycle (Tf) when the control telegram is received, to the start of light-emission, included in the control telegram,
The light alarm device starts light emission of the light emitting unit according to the light emission waiting time information (Tsi) included in the control message received first by intermittent reception, and repeats light emission according to the light emission period (Tf). Alarm system to play.
In the alarm system according to claim 7,
The light warning control device transmits to the relay instruction message including light emission waiting time information (Tr0) from the end of reception when the relay instruction message is received until the next light emission start,
The light alarm device under light emission control that has received the relay instruction message sets the transmission cycle consisting of the transmission time (T1) and the transmission pause time (T2) a plurality of times, and sets each transmission time (T1). Repeat the transmission of the relay control message a plurality of times, and if the light emission of the light emitting unit and the relay transmission time do not overlap, the light emission waiting time information (Tr0) is added to the relay required time (ΔTi) for each message required to relay the message The light emission waiting time information (Tri) is relayed and transmitted in the relay control message, and the light emission waiting time information (Tr) is relayed to the message when the light emission of the light emitting unit and the relay transmission time overlap. The relay waiting time information (Tri) corrected in consideration of the relay required time (ΔTi) and the light emission time (Tw) for each required message is included in the relay control message after light emission, and relayed,
The light warning device at the relay destination starts light emission of the light emitting unit based on the corrected light emission waiting time information (Tri) included in the relay control message first received effectively by intermittent reception, and emits light according to the light emission period (Tf). An alarm system characterized by repeating.
9. The alarm system according to claim 8, wherein the relay required time (ΔTi) is from the end of reception of the relay instruction message from the light alarm control device to the end of relay transmission of the relay control message by the light alarm device. Alarm system characterized by time.
The alarm system according to claim 9, wherein the light alarm device in the light emission control that receives the relay instruction message is:
When the transmission of the relay control message ends within the first light emission cycle of transmitting the relay instruction message, the light emission waiting time information corrected by subtracting the relay required time (ΔTi) from the light emission waiting time information (Tr0). (Tri = Tr0−ΔTi) is calculated and included in the relay control message,
When the transmission of the relay control message is terminated within the second and subsequent light emission periods, from the time obtained by adding one or more light emission periods according to the order of the light emission periods to which the transmission end timing belongs to the light emission waiting time information. The light emission waiting time information (Tri = (Tr0 + n · Tf) −ΔTi) corrected by subtracting the relay required time is calculated and included in the relay control message,
When the relay control message is transmitted within the light emission period after the light emitting unit emits light, the light emission waiting time information (Tri) is further corrected by subtracting the light emission period (Tw) from the corrected light emission waiting time information (Tri). ) Is calculated and included in the relay control message.

Images