JP6013027B2 - Fire alarm system, fire alarm method for fire alarm system, and fire alarm program for fire alarm system - Google Patents

Description

  The present invention relates to a fire alarm system, a fire determination method of the fire alarm system, and a fire determination program of the fire alarm system.

  A fire alarm system for detecting a fire by detecting infrared energy radiated from a fire is known. Such a fire alarm system includes, for example, a fire detector and a disaster prevention receiver. For example, a plurality of fire detectors are arranged in a tunnel. The disaster prevention receiver determines the occurrence of a fire in response to a detection signal informing the fire received from the fire detector. In such a fire alarm system, noise is generated due to deterioration of a wiring cable connected to the fire detector, and an erroneous detection signal may be transmitted from the fire detector to the disaster prevention receiver. In such a case, the fire alarm system erroneously determines that a fire has occurred despite the fact that no fire has occurred, and generates a false alarm that warns the fire according to the determined result.

  For this reason, in patent document 1, the pulse interval of a signal pulse is compared with the time of each pulse interval stored in the database. In Patent Document 1, it is proposed to determine whether the signal pulse is due to a fire factor or a factor other than a fire, and to reduce false alarms.

  Even when the fire detector detects light or flame and a detection signal is transmitted from the fire detector to the disaster prevention receiver, there may be no fire. Fire alarms based on such detection signals are non-fire reports, and it is desirable to reduce non-fire reports.

JP 2011-186895 A

  However, when a vehicle accident occurs, the driver or the like may use a flame tube near the fire detector. In such a case, in Patent Document 1, the fire detector may detect infrared energy from the flame tube and transmit a detection signal to the disaster prevention receiver. If it does so, even if the technique described in Patent Document 1 could reduce false alarms, there was a problem that non-fire alarms could not be prevented.

  The present invention has been made in view of the above problems, and includes a fire alarm system capable of reducing non-fire alarms while reducing false alarms, a fire determination method for a fire alarm system, and a fire determination program for a fire alarm system. It is intended to provide.

In order to achieve the above object, a fire alarm system according to one aspect of the present invention includes a first detector and a second detector that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the first and second detection units is a system that transmits monitoring information according to a result of monitoring a fire in the monitoring area and identification information assigned to the first detection unit to the disaster prevention receiver. Part, a translucent window, a sensor that receives light energy from the monitoring region through the translucent window and converts it into an electrical signal, and a contamination degree detection that detects the degree of contamination of the translucent window And the disaster prevention receiver includes a storage unit that stores information associated with the identification information of each of the first and second detection units for each monitoring area, and a determination unit that determines a fire. The transmission unit detects the degree of contamination. The contamination information according to the degree of contamination detected in the stage is transmitted to the disaster prevention receiver, the determination unit determines the contamination state of the translucent window based on the contamination information received from the transmission unit, When it is determined that one of the first and second detection units is contaminated, the monitoring information from the detection unit is not used for the fire determination within a predetermined contamination time. The fire is determined based on the monitoring information from the other detection unit.
In order to achieve the above object, a fire alarm system according to one aspect of the present invention includes a first detector and a second detector that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the first and second detection units is a system that transmits monitoring information according to a result of monitoring a fire in the monitoring area and identification information assigned to the first detection unit to the disaster prevention receiver. And the first or second detection unit includes failure detection means for detecting a circuit failure of itself, and the disaster prevention receiver is configured to identify the identification information of each of the first and second detection units. A storage unit that stores information associated with each monitoring area and a determination unit that determines a fire, and the transmission unit transmits the failure information detected by the failure detection means to the disaster prevention receiver. The determination unit receives from the transmission unit. The circuit failure is determined based on the failure information, and when one of the first and second detection units is determined to be within the predetermined failure predetermined time, The monitoring information is not used for fire determination, and a fire is determined based on the monitoring information from the other detection unit.
In the fire alarm system according to one aspect of the present invention, the monitoring area may be any one of a plurality of areas divided in a road tunnel at predetermined intervals in the traveling direction of the vehicle. .
In the fire alarm system according to one aspect of the present invention, a fire detector integrally including the first and second detection units is provided for each boundary of the monitoring region, and the fire detector The first and second detection units may monitor the monitoring areas adjacent to each other.
In order to achieve the above object, a fire determination method for a fire alarm system according to an aspect of the present invention includes a first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the first and second detection units transmitting monitoring information according to a result of monitoring the fire in the monitoring area and identification information assigned to the transmitting unit to the disaster prevention receiver; , A translucent window, and a sensor that receives light energy from the monitoring region through the translucent window and converts it into an electrical signal, wherein the disaster prevention receiver includes the first and second detections. A fire determination method for a fire alarm system, comprising: a storage unit that stores information associated with the identification information of each unit for each monitoring area; and a determination unit that determines a fire. Dirty detection to detect the degree of glazing A detection procedure, a transmission procedure in which the transmission unit transmits the contamination information according to the contamination level detected by the contamination level detection procedure, and the identification information assigned to the transmission unit to the disaster prevention receiver, A determination unit receives the contamination information and the identification information transmitted by the transmission procedure, determines a contamination state of the translucent window based on the received contamination information, and the first and second detections When the contamination of one of the transparent windows is determined, the monitoring information from the detection unit is not used for fire determination within a predetermined contamination predetermined time, and from the other detection unit And a determination procedure for determining a fire based on the monitoring information.
In order to achieve the above object, a fire determination method for a fire alarm system according to an aspect of the present invention includes a first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. A fire alarm system comprising: the first and second detectors each receiving monitoring information according to a result of monitoring a fire in the monitoring area, and identification information assigned to the disaster prevention receiver. A transmission unit for transmitting to the storage unit, wherein the disaster prevention receiver stores, for each monitoring area, information associated with the identification information of each of the first and second detection units, and a determination for determining a fire And a fire detection method of a fire alarm system comprising: a failure detection procedure in which the failure detection means detects its own circuit failure; the failure information detected by the failure detection means; Assigned to A transmission procedure for transmitting the identification information received to the disaster prevention receiver, and the determination unit receives the failure information and the identification information transmitted by the transmission procedure, and based on the received failure information, When a circuit failure is determined and one of the first and second detection units is determined, the monitoring information from the detection unit is determined to be a fire determination within a predetermined failure predetermined time. And a determination procedure for determining a fire based on the monitoring information from the other detection unit without using it.
In order to achieve the above object, a fire determination program for a fire alarm system according to one aspect of the present invention includes a first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the first and second detection units transmitting monitoring information according to a result of monitoring the fire in the monitoring area and identification information assigned to the transmitting unit to the disaster prevention receiver; , A translucent window, and a sensor that receives light energy from the monitoring region through the translucent window and converts it into an electrical signal, wherein the disaster prevention receiver includes the first and second detections. The computer of the disaster prevention receiver in a fire alarm system comprising: a storage unit that stores information associated with the identification information of each unit for each monitoring region; and a determination unit that determines a fire. In front of the detector The contamination information according to the degree of contamination detected by the transmission unit transmitted from the transmission unit and the identification information assigned to itself is received, and the light transmission based on the received contamination information. When the contamination state of the translucent window is determined, and when the contamination of the translucent window of one of the first and second detection units is determined, the predetermined detection time from the detection unit is determined. A determination procedure for determining a fire based on the monitoring information from the other detection unit is executed without using the monitoring information for the fire determination.
In order to achieve the above object, a fire determination program for a fire alarm system according to one aspect of the present invention includes a first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the first and second detection units transmitting monitoring information according to a result of monitoring the fire in the monitoring area and identification information assigned to the transmitting unit to the disaster prevention receiver; And the disaster prevention receiver includes a storage unit that stores information associated with the identification information of each of the first and second detection units for each monitoring area, and a determination unit that determines a fire. The failure information and the identification information, which are detected by the first and second detection units, are transmitted to the computer of the disaster prevention receiver in the system and transmitted by the transmission unit of the first and second detection units. And receive The circuit failure is determined based on the failure information, and when one of the first and second detection units is determined to be within the predetermined failure predetermined time, The monitoring information is not used for fire determination, and a determination procedure for determining a fire based on the monitoring information from the other detection unit is executed.
The fire alarm system according to one aspect monitors one monitoring area with a first detection unit and a second detection unit, and the first and second detection units provide monitoring information according to each monitoring result. Transmitted to the disaster prevention receiver, and the disaster prevention receiver determines the fire based on the monitoring information received from one of the first and second detection units, and then determines the first and the first during a first predetermined time. Based on both of the monitoring information received from each of the two detection units, a fire is determined, and after the first predetermined time has elapsed, during the second predetermined time, based on the monitoring information received from the one detection unit Judging by fire.

Moreover, in the fire alarm system according to one aspect, the disaster prevention receiver is based on the monitoring information received from the other detection unit when there is a failure in one function of the first and second detection units. You may make it judge a fire.

In the fire determination method of the fire notification system according to one aspect, the first detection unit and the second detection unit monitor one monitoring region, and the first and second detection units correspond to the respective monitoring results. Monitoring information is transmitted to a disaster prevention receiver, and the disaster prevention receiver determines a fire based on the monitoring information received from one of the first and second detection units for a first predetermined time period. The fire is determined based on both of the monitoring information received from each of the first and second detection units, and after the first predetermined time has elapsed, the second predetermined time received from the one detection unit. It is characterized by judging fire based only on monitoring information.

Further, in the fire determination method of the fire alarm system according to one aspect, the monitoring received from the other detection unit when the disaster prevention receiver has a failure in one function of the first and second detection units. A fire may be determined based on the information.

The fire determination program for a disaster prevention receiver according to one aspect monitors one monitoring area with a first detection unit and a second detection unit, and monitors the first and second monitoring information according to each monitoring result. The computer of the disaster prevention receiver that receives from the detection unit, the first and second for a first predetermined time after determining a fire based on the monitoring information received from one of the first and second detection units A procedure for judging a fire based on both of the monitoring information received from each of the detection units, and during the second predetermined time after the elapse of the first predetermined time, only the monitoring information received from the one detection unit It is characterized in that a procedure for judging a fire based on this is executed.

A fire notification system according to an aspect is a fire notification system including a first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area. Each of the two detection units includes a transmission unit that transmits monitoring information corresponding to a result of monitoring the fire in the monitoring area and identification information assigned to the detection unit to the disaster prevention receiver, and the disaster prevention receiver includes: A fire is determined based on the monitoring information received from one of the first or second detection unit and the storage unit storing information associated with the identification information of each of the first and second detection units for each monitoring region Then, if a fire is determined from the monitoring information received from the other detection unit within the first predetermined time, it is determined that there is a fire, and monitoring information cannot be received from the other detection unit within the first predetermined time, or the other Monitoring information received from the detector If the fire is not determined, the fire is determined when the fire is determined from the monitoring information transmitted from the one detection unit until the second predetermined time elapses after the first predetermined time elapses. And a determination unit.

Further, in the fire alarm system according to one aspect, the first and second detection units receive light energy from the monitoring region through the translucent window and the translucent window and convert it into an electrical signal. And a degree of contamination detection means for detecting the degree of contamination of the translucent window, and the transmission unit transmits contamination information according to the degree of contamination detected by the degree of contamination detection to the disaster prevention receiver. And the determination unit determines a contamination state of the translucent window based on the contamination information received from the transmission unit, and determines one of the first and second detection units. If the contamination is determined, the monitoring information from the detection unit is not used for the fire determination within a predetermined third predetermined time, and the fire is determined based on the monitoring information from the other detection unit. May be.

In the fire alarm system according to one aspect, the first or second detection unit includes a failure detection unit that detects a circuit failure of the device, and the transmission unit includes the failure information detected by the failure detection unit. Transmitting to the disaster prevention receiver, the determination unit determines the circuit failure based on the failure information received from the transmission unit, and one of the first and second detection units is determined. In such a case, the monitoring information from the detection unit may not be used for the fire determination within a predetermined fourth predetermined time, and the fire may be determined based on the monitoring information from the other detection unit.

In the fire alarm system according to an aspect, the monitoring area may be an arbitrary area among a plurality of areas obtained by dividing the inside of the road tunnel in the traveling direction of the vehicle at predetermined intervals.

Further, in the fire alarm system according to one aspect, a fire detector integrally including the first and second detection units is provided for each boundary of the monitoring area, and the first and second of the fire detector are provided. The two detection units may monitor monitoring areas adjacent to each other.

In the present invention, when there is a failure such as a circuit failure or contamination of a light-transmitting window in one detection unit, a fire is judged based on monitoring information from the other detection unit that monitors the same monitoring area. . As a result, even if one detector has a failure such as a circuit failure or a translucent window, the other detection does not have a failure such as a circuit failure or a translucent window. Fire can be determined based on the monitoring information of the department.
For example, since the detection unit having a translucent window determined to be dirty is not used for the fire determination for a predetermined period of time (third predetermined time), the translucent window is Even when a fire is determined based on monitoring information with low reliability obtained in a contaminated state, false and non-fire reports can be reduced. In addition, even if the light-transmitting window of one detector is contaminated and fire detection is not possible, the fire is judged based on the monitoring information of the other detector that does not contaminate the light-transmitting window. Can be prevented.
In addition, for example, the detection unit that is determined to be a circuit failure is not used for fire determination during a predetermined failure time (fourth predetermined time), so that the circuit operation becomes unstable due to a temporary failure factor. Even if a fire is determined based on the low-reliability monitoring information obtained in step 1, false and non-fire reports can be reduced. Further, even when one circuit fails and fire detection is not possible, a fire determination is made based on the monitoring information of the other detection unit that does not have a circuit failure, so that misreporting can be prevented.
In one aspect , a fire is determined based on two pieces of monitoring information obtained from the first detection unit and the second detection unit that monitor the same monitoring area. As a result, for example, even if one of the detection units erroneously detects or malfunctions due to noise or the like and transmits monitoring information, and the fire is determined based on this, the other detection is performed within the first predetermined time. When a fire is not determined based on the monitoring information transmitted by the department, it is not determined (determined) as a fire, and false and non-fire reports due to a temporary factor can be prevented. In addition, since the fire is judged based on the monitoring information from one of the detectors for the second predetermined time after the lapse of the first predetermined time, it prevents a misreport that is not judged as a fire despite being a fire. can do.
Moreover, in one aspect , when there is a failure such as a circuit failure or contamination of the translucent window in one detection unit, a fire is caused based on the monitoring information from the other detection unit that monitors the same monitoring area. Judging. As a result, even if one detector has a failure such as a circuit failure or a translucent window, the other detection does not have a failure such as a circuit failure or a translucent window. Fire can be determined based on the monitoring information of the department.
In one aspect, for example, a detection unit (or a detection unit determined to be a circuit failure) having a translucent window determined to be dirty is not used for the fire determination for the third or fourth predetermined time. Therefore, it is determined as a fire based on the unreliable monitoring information obtained when the translucent window is damaged (or the circuit operation becomes unstable) due to a temporary contamination factor (or failure factor). Even if it happens, false and non-fire reports can be reduced. Also, even if one of the light-transmitting windows is soiled (or the circuit is broken) and the fire cannot be detected, the other light-transmitting window is not soiled (or has no circuit failure). Because the fire is judged based on the monitoring information, it is possible to prevent misreporting.
In one aspect, for example, the detection unit that is determined to be a circuit failure is not used for the fire determination for the third or fourth predetermined time, so that the circuit operation becomes unstable due to a temporary failure factor. Even when a fire is determined based on the low-reliability monitoring information obtained in the above state, false and non-fire reports can be reduced. Moreover, even when the circuit of one detection unit fails and fire detection is not possible, or because the fire is determined based on the monitoring information of the other detection unit without a circuit failure, it is possible to prevent misreporting. .
In the present invention, the disaster prevention receiver monitors the same monitoring area adjacent to each other using the corresponding identification information among the received monitoring information based on the information stored in the storage unit. The fire is judged based on the two monitoring information with the second detection unit. As a result, even when two or more sets of detection units are installed, a fire is determined based on two monitoring information of the first and second detection units that monitor the same monitoring area adjacent to each other. Therefore, false information can be reduced and non-fire information can be reduced.
Further, in the present invention, since the monitoring area in the tunnel is monitored, it is possible to reduce false and non-fire reports in the fire judgment in the tunnel.
In the present invention, a fire detector including two detection units is provided for each boundary of the monitoring area, and the two detection units monitor the monitoring areas adjacent to each other. Duplicate monitoring of fire detectors. As a result, it is sufficient to provide one fire detector for each boundary of the monitoring area, so that the labor for installation can be reduced, and false and non-fire reports can be reduced.

It is a schematic block diagram which shows schematic structure of the fire alerting | reporting system which concerns on this invention. It is a figure explaining the example of arrangement of the fire detector of the present invention. It is the block diagram which showed the principal part structure of the fire detector which concerns on 1st Embodiment. It is a figure which shows the outline of the monitoring information which a fire detection part transmits to a disaster prevention receiver. It is the front view and sectional drawing of the fire detector which concern on 1st Embodiment. It is the block diagram which showed the principal part structure of the disaster prevention receiver which concerns on 1st Embodiment. It is a figure explaining an example of the information memorized by the storage part. It is a flowchart which shows the outline of the operation | movement procedure of the fire detector which concerns on 1st Embodiment. It is a flowchart which shows the outline of the operation | movement procedure of the disaster prevention receiver which concerns on 1st Embodiment. It is a figure explaining the outline of the 1st predetermined time and the 2nd predetermined time. It is a figure explaining the example which the vehicle has stopped in the monitoring area | region. It is the block diagram which showed the principal part structure of the fire detector which concerns on 2nd Embodiment. It is the front view and sectional drawing of the fire detector which concern on 2nd Embodiment. It is the block diagram which showed the principal part structure of the disaster prevention receiver which concerns on 2nd Embodiment. It is a flowchart which shows the outline of a pollution monitoring process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a schematic block diagram showing a schematic configuration of a fire alarm system 1 according to the present invention. As shown in FIG. 1, the fire alarm system 1 includes a fire detector 10 (10A, 10B, 10C, 10D), a transmission path 20, and a disaster prevention receiver 30.

The fire detector 10 is attached to, for example, a tunnel wall surface, a ceiling surface, or a support column provided in the tunnel 40. The fire detector 10 monitors the fire with two detection units, and transmits monitoring information based on the monitored results from the transmission unit to the disaster prevention receiver 30 via the transmission path 20. Specifically, the detection unit of the fire detector 10 in the present embodiment monitors a fire (flame) by observing the amount of infrared rays in the monitoring area, and is based on the information indicating the amount of infrared rays or the amount of infrared rays as a monitoring result. Thus, information indicating that a fire has been detected is transmitted from the transmission unit to the transmission line 20 as monitoring information (in this embodiment, the latter case will be described as an example). The monitoring information is transmitted to the disaster prevention receiver 30 together with or including the identification information for identifying the fire detector 10 and its detection unit.
The disaster prevention receiver 30 determines whether or not a fire has occurred based on the monitoring information received from each fire detector 10. Specifically, when the disaster prevention receiver 30 receives monitoring information from the fire detector 10, the determination unit determines the presence or absence of a fire from information included in the monitoring information. That is, when the monitoring information indicates the amount of infrared rays, a fire determination process is performed based on the infrared ray amount by a predetermined calculation or the like to determine the presence or absence of a fire. When the monitoring information indicates that a fire has been detected, it is determined that there is a fire based on this. And the detection part discriminate | determined as fire is specified from the identification information transmitted with this monitoring information. The fire determination (judgment) process based on the fire determination for each detection unit will be described later.
For example, when the disaster prevention receiver 30 is installed in a monitoring room or the like and determines that a fire has occurred (determined), information indicating that a fire has occurred is output to a display unit, an acoustic notification unit, or the like. Alarm.

  FIG. 2 is a diagram for explaining an arrangement example of the fire detector 10 of the present invention. This figure is an overhead view of the tunnel 40 from above. The tunnel 40 is divided into a plurality of monitoring areas at regular intervals L with respect to the traveling direction of the vehicle. Here, the monitoring areas 40A, 40B, and 40C are illustrated. The constant interval L is, for example, 25 [m (meter)]. The fire source 50 is a place where a fire (flame) occurs. In this figure, the case where the fire source 50 is in the monitoring area 40B is shown. The fire detector 10 is attached to, for example, a height of about 2 to 2.5 [m] from the road surface on the boundary wall surface of the plurality of monitoring regions. The fire detectors 10 do not need to be installed at equal intervals, and the fixed interval L may be a length other than 25 [m].

The fire detector 10 (10A to 10D) includes a first detection unit 11 (11A, 11B, 11C, 11D) and a second detection unit 12 (12A, 12B) that independently monitor two adjacent monitoring areas. , 12C, 12D). That is, for example, the first detector 11B of the fire detector 10B and the second detector 12C of the fire detector 10C adjacent to the fire detector 10B independently monitor the monitoring area 40B in an overlapping manner. ing. In the present invention, the adjacent fire detectors 10 are the fire detectors 10 installed adjacent to each other among the plurality of fire detectors 10 installed along the traveling direction of the vehicle. It is. The same applies to the case where the monitoring areas are adjacent.
Although three monitoring areas are shown in FIG. 2, the number of monitoring areas may be less than three, or may be four or more. In this case, the number of fire detectors 10 according to the boundary of the monitoring area is installed.
Note that the fire detector 10 installed at both ends in the tunnel longitudinal direction (vehicle traveling direction), that is, at the entrance / exit, does not need to include a detection unit for monitoring the outside of the tunnel because no monitoring area is set outside the tunnel. Or the monitoring information by monitoring of this detection part should just not be used for the fire discrimination in the disaster prevention receiver 30, and a fire judgment.

Next, the circuit and functional configuration of the fire detector 10 will be described. FIG. 3 is a block diagram showing a main configuration of the fire detector 10 according to the present embodiment. As shown in FIG. 3, the fire detector 10 includes a first detection unit 11, a second detection unit 12, a fire detection unit 130, a transmission / reception unit (transmission unit) 140, and an identification information setting unit 150.
Although not shown in the drawing, a translucent window is provided in front of the first detection element 111 and the second detection element 121 of the first detection unit 11 and the second detection unit 12 (on the monitoring region side). With this, the inside of the fire detector 10 is protected from the environment on the monitoring area side while transmitting light (infrared) energy from the monitoring area. The first detection elements 111 and 121 are provided with optical wavelength filters (bandpass filters) that selectively transmit light in a predetermined wavelength band centered at approximately 4.5 [μm].
Similarly, although not shown, the fire detector 10 corresponds to the first detection unit 11 and the second detection unit 12, respectively, and a contamination degree detection unit that detects the degree of contamination of these translucent windows. (Fouling degree detection means) and a failure detection section (failure detection means) for detecting a failure in the internal circuit of the fire detector 10 (for example, each component shown in FIG. 3). These configurations will be described later.

The first detection unit 11 includes a first detection element (sensor) 111 and an A / D (analog-digital) conversion unit 112.
The first detection element 111 is an optical sensor that receives the energy of the radiated light in the wavelength band of resonance radiation caused by CO ₂ (carbon dioxide) generated during flammable combustion, converts it into an electrical signal, and outputs it as a detection signal. That is, the first detection element 111 outputs a detection signal (analog signal) corresponding to the amount of infrared light received from the monitoring area to the A / D conversion unit 112 via a filter circuit, an amplification circuit, or the like (not shown). The A / D conversion unit 112 converts this into a digital signal and outputs the digital signal to the fire detection unit 130 including a computer circuit including a microprocessor. The A / D conversion unit 112 may be provided in the fire detection unit 130.
The second detection unit 12 includes a second detection element 121 and an A / D conversion unit 122. The functions of the second detection element 121 and the A / D conversion unit 122 are the same as those of the first detection element 111 and the A / D conversion unit 112.

The fire detection unit 130 detects a fire based on digital detection signals output from the A / D conversion unit 112 and the A / D conversion unit 122 of the first detection unit 11 and the second detection unit 12. Specifically, for example, the fire detection unit 130 extracts the fluctuation frequency of the detection signal, the extracted frequency is in the range of the fluctuation (flicker) characteristic of the flame, and the fluctuation amplitude level (signal integration amount) of the detection signal. , Peak level or the like) is greater than or equal to a predetermined level, a fire (fire occurrence) in the monitoring area is detected. When the fire detection unit 130 detects a fire in this manner, the fire detection unit 130 generates a detection signal based on the detection result, and outputs the generated detection signal to the transmission / reception unit 140.
The transmission / reception unit 140 stores unique identification information of each detection unit in the identification information setting unit 150 based on the setting command received from the disaster prevention receiver 30. The transmission / reception unit 140 adds the identification information stored in the identification information setting unit 150 to the monitoring information generated based on the detection signal output by the fire detection unit 130 and transmits the monitoring information to the disaster prevention receiver 30. Note that the identification information may be registered and stored in advance in the identification information setting unit by other means and methods regardless of the setting command from the receiver.
The identification information setting unit 150 stores the identification information assigned by the disaster prevention receiver 30. “Identification information” corresponds to the address of the fire detector 10, for example, and “identifier” described later corresponds to the ID of the detection unit.

FIG. 4 is a diagram illustrating an outline of monitoring information transmitted from the fire detection unit 130 to the disaster prevention receiver 30. As shown in FIG. 4, the monitoring information includes identification information, a monitoring result, and other information. The identification information is information indicating the first detection unit, information indicating the second detection unit, and the like. Specifically, the detection signal output from the fire detection unit 130 can be used. Here, the monitoring result is information according to the result of observation of the monitoring area, and the information according to the observation result may be information indicating that a fire is detected, for example, or infrared Information indicating the amount (information indicating the detection signal data, information based on the amplitude of the detection signal (for example, a level indicating a detection result such as infrared intensity)), etc. A case in which the information is information will be described. In addition, when the monitoring result of monitoring information is information which shows infrared rays amount, the disaster prevention receiver 30 which received this determines whether a fire has occurred based on this information. On the other hand, the monitoring result may be fire resolution (recovery) information indicating that the fire has been resolved, separately from information indicating that the fire has been detected. Alternatively, the fire extinguishing information may be included in other information.
In addition, when identification information is assigned to each fire detector 10, an identifier (each code indicating whether the first detection unit is different from the second detection unit) is assigned to identify each detection unit. In this case, disaster prevention receiver 30, using a combination of identification information and an identifier, it identifies the detector.

FIG. 5 is a front view and a cross-sectional view of the fire detector 10 according to the present embodiment. In FIG. 5, the left-right direction (vehicle traveling direction) of the fire detector 10 in the installed state is the x-axis direction, the vertical direction of the fire detector 10 is the y-axis direction, and the thickness direction of the fire detector 10 is the z-axis direction. . As shown in FIG. 5, the fire detector 10 includes a cover 101 and a main body 104. The cover 101 is provided with translucent windows 102 and 103 on the left and right inclined surfaces of the cover 101, respectively. Moreover, the 1st detection part 11 and the 2nd detection part 12 are each arrange | positioned under the z-axis of the translucent windows 102 and 103, respectively. Each of the first detection element 111 of the first detection unit 11 and the second detection element 121 of the second detection unit 12 can observe the monitoring region through these translucent windows. The 1st detection part 11 and the 2nd detection part 12 are connected to the board | substrate 105 with which the circuit containing the transmission / reception part 140 (refer FIG. 3) was mounted. The substrate 105 is connected to the waterproof connector 21 and the signal cable 22 via the wiring 106. The signal cable 22 is connected to the transmission line 20 in FIG. That is, the transmission / reception unit 140 is connected to the transmission path 20. The power necessary for the operation of the fire detector 10 is supplied from the disaster prevention receiver 30 through the transmission line 20 or another line via a waterproof connector. Also, attachment pieces 107 for attaching the fire detector 10 to the wall surface are provided on the left and right sides of the cover 101 or the main body 104 in the x-axis direction.
The translucent windows 102 and 103 are made of sapphire glass, for example. Therefore, the translucent windows 102 and 103 have a high cut (long wave cut) characteristic that blocks light exceeding a wavelength of about 7.0 [μm], but of course includes 4.5 [μm]. Transmits light in the wavelength band.

  Next, the disaster prevention receiver 30 will be described. FIG. 6 is a block diagram showing a main configuration of the disaster prevention receiver 30 according to the present embodiment. As illustrated in FIG. 6, the disaster prevention receiver 30 includes a transmission / reception unit 301, a determination unit 302, a storage unit 303, a timer unit 304, a notification unit 305, and an output unit 306. The disaster prevention receiver 30 transmits / receives information to / from the fire detector 10 via the transmission path 20 by the transmission / reception unit 301.

The transmission / reception unit 301 receives the monitoring information transmitted by the fire detector 10 and outputs the received monitoring information to the determination unit 302.
The determination unit 302 determines whether or not a fire has occurred in the tunnel 40 based on the monitoring information received by the transmission / reception unit 301 and the information output by the timer unit 304. Based on the information stored in the storage unit 303, the determination unit 302 assigns identification information for identifying these to each detection unit of each fire detector 10, and the assigned identification information is transmitted and received as setting command information. It transmits to the fire detector 10 via 301. For example, in FIG. 2, the disaster prevention receiver 30 assigns identification information “ID0001” to the second detection unit 12A of the fire detector 10A, assigns identification information “ID0002” to the first detection unit 11A, and assigns the assigned identification information. It is transmitted to the fire detector 10A together with the setting command. In response to this, the fire detector 10 stores the identification information assigned to each of its detection units in the identification information setting unit 150. The disaster prevention receiver 30 may assign identification information for each fire detector 10. That is, the determination unit 302 may assign unique identification information to the fire detectors 10 in order in the traveling direction of the vehicle, for example, in the tunnel 40, as shown in FIG. Good. In this case, the monitoring information transmitted from the fire detector 10 to the disaster prevention receiver 30 includes identification information of the fire detector 10 and information (identifier) indicating each detection unit.
Registration of identification information to the fire detector 10 by such command transmission may be performed each time the disaster prevention receiver 30 is activated, for example.
When the determination unit 302 receives monitoring information including identification information from the fire detector 10, the determination unit 302 performs first detection of the fire detector 10 that monitors the same monitoring area based on the information stored in the storage unit 303. The unit 11 or the second detection unit 12 is extracted. For example, when the monitoring information including the identification information “ID0002” of the first detection unit 11A is received from the fire detector 10A, the determination unit 302 monitors the same monitoring area as the first detection unit 11A. The identification information of 10B 2nd detection part 12B is extracted based on the information memorize | stored in the memory | storage part 303, A fire is judged with reference to the monitoring information containing this identification information. If the determination unit 302 determines that a fire has occurred in the tunnel 40, the determination unit 302 outputs notification information indicating that a fire has occurred to the notification unit 305. The notification information includes information indicating a monitoring area where a fire has occurred. The determination unit 302 controls the timer unit 304 to start the operation (timekeeping) when monitoring information is first received after the start of fire monitoring.

FIG. 7 is a diagram illustrating an example of information stored in the storage unit 303. This information is stored by registering in advance by appropriate means and methods. For example, as shown in FIG. 7, in the storage unit 303, identification information, information indicating a detection unit (identifier; when identification information is set for each detection unit, identification information is sufficient, and this information is omitted), and Information indicating the monitoring area is associated and stored. For example, the identification information “ID0002” is allocated and stored in the first detection unit 11A of the fire detector 10A, and the monitoring area 40A is stored in association with the identification information “ID0002”. The disaster prevention receiver 30 can recognize other detection units that monitor the same monitoring area from the monitoring area. For example, the monitoring area 40A is allocated to the first detection unit 11A of the identification information “ID0002”, and the detection unit monitors this monitoring area. On the other hand, it is recognized from the stored data (table) in FIG. 7 that the monitoring area 40A is also monitored by the second detection unit 12B of the identification information “ID0003”.
The timer unit 304 starts an operation (time measurement) under the control of the determination unit 302. When the timer unit 304 is within a first predetermined time (for example, 20 seconds) that is a preset time from the start of timing, the timer unit 304 outputs information indicating that fact to the determination unit 302. When the first predetermined time has elapsed, the timer unit 304 outputs information indicating that the first predetermined time has elapsed to the determination unit 302.
The reporting unit 305 outputs, to the output unit 306, information indicating that a fire has occurred and information indicating a monitoring area where the fire has occurred based on the notification information output by the determination unit 302. .
The output unit 306 is, for example, an image display device, a lamp, or a sound output device. In accordance with information obtained from the reporting unit 305, the output unit 306 displays information indicating the content of the report, or lights (or flashes) the lamp. Or by outputting a sound according to the content of the alert. The output unit 306 may be any one of an image display device, a lamp, and a sound output device, or a combination of two or more.

Next, the operation of the fire detector 10 will be described. FIG. 8 is a flowchart showing an outline of an operation procedure of the fire detector 10 according to the present embodiment.
The fire detection unit 130 of each fire detector 10 periodically samples a detection signal obtained by A / D converting an electrical signal corresponding to the amount of incident light received by the first detection unit 11 or the second detection unit 12 of the fire detector 10. (Step S1). Sampling is performed, for example, at 32 Hz for 2 seconds (64 times), and is performed in a predetermined cycle. When the fire detection unit 130 determines that a predetermined (for example, 64 times) average level or integrated level of the sampled electrical signal is larger than a predetermined threshold value (step S2; Yes), the fire detection unit 130 The process proceeds to step S3. On the other hand, if it is determined that the average level or the integration level is equal to or less than a predetermined threshold (step S2; No), the process returns to step S1.
Next, based on whether the center frequency of the detection signal detected by the first detection unit 11 or the second detection unit 12 is a predetermined frequency, such as by performing FFT calculation on the sampling data for 2 seconds, It is determined whether or not the detection signal is due to a fire (step S3). The predetermined frequency is a flicker (fluctuation) frequency peculiar to a fire flame, for example, about 2 [Hz (Hertz)]. When the fire detection unit 130 determines that the period of the center frequency of the detection signal is a predetermined frequency (step S3; Yes), the fire detection unit 130 determines that there is a fire in the monitoring region of the corresponding detection unit, and proceeds to step S4. When it is determined that the center frequency of the detection signal is not a predetermined frequency (step S3; No), the process returns to step S1.
If it is determined in step S3 that the center frequency of the detection signal is a predetermined frequency, the fire detection unit 130 outputs the detection signal to the transmission / reception unit 140, and based on this, the transmission / reception unit 140 monitors based on the detection signal. Information is transmitted to the disaster prevention receiver 30. For example, when it is determined that the detection signal of the second detector 12B of the fire detector 10B is due to a fire, the transmitted monitoring information includes the identification information of the second detector 12B of the fire detector 10B, the second detector 12B. Information indicating a fire (presence) based on the detection signal is included.

Next, the operation of the disaster prevention receiver 30 will be described. FIG. 9 is a flowchart illustrating an outline of an operation procedure of the disaster prevention receiver 30 according to the present embodiment.
When the first monitoring information is received from any of the fire detectors 10 after the start of fire monitoring, the determination unit 302 of the disaster prevention receiver 30 determines the presence or absence of a fire based on the received monitoring information. The determination unit 302 stores the determined result in the storage unit 303 (step S11). Next, the determination unit 302 controls the timer unit 304 to start counting the first predetermined time with the corresponding timer, extracts the identification information from the monitoring information received first, and extracts the extracted identification information. The detection part of the fire alarm which transmitted monitoring information based on is specified (step S12). It should be noted that appropriate preliminary notification may be performed from the output unit 306 at this stage.
Next, based on the information stored in the storage unit 303, the determination unit 302 extracts a detection unit that monitors the same monitoring area as the detection unit specified in step S12 (step S13).
Next, the determination unit 302 performs a process within the first predetermined time based on the time measurement result measured by the timer unit 304 (step S14). If the determination unit 302 receives the monitoring information of the detection unit extracted in step S13 within the first predetermined time and determines that there is a fire based on the received monitoring information (step S14; receives the monitoring information), the monitoring region In step S17, it is determined that a fire has occurred.
On the other hand, if the determination unit 302 does not determine that there is a fire based on the monitoring information of the detection unit extracted in step S13 within the first predetermined time, the determination unit 302 stands by and cancels the fire of the detection unit specified in step S12 during the standby ( (Recovery) When information is received (step S14; fire extinguishing information is received), the process returns to step S11.
When the first predetermined time has elapsed without receiving the monitoring information of the detection unit extracted in step S13 (step S14; the first predetermined time has elapsed), the determination unit 302 clears the time count of the timer unit 304 and performs step S15. Proceed to

When the first predetermined time has elapsed without receiving the monitoring information from the detection unit extracted in step S13, the determination unit 302 resets the corresponding timer of the timer unit 304 and sets a predetermined second predetermined time. Time measurement is started (step S15).
Next, as a process within the second predetermined time, the determination unit 302 confirms whether or not it is continuously determined that there is a fire based on the monitoring information of the detection unit that has transmitted the first monitoring information specified in step S12. (Step S16). If it is determined that there is still a fire (step S16; fire is determined), the determination unit 302 determines that a fire has occurred in the monitoring area and proceeds to step S17. If the second predetermined time has passed without being determined that there is a fire (step S16; second predetermined time has elapsed), the time count of the timer unit 304 is cleared and the process returns to step S11.
Next, when the determination unit 302 determines that a fire has occurred based on the processing in step S14 or S16, the information based on the determination result as the fire processing (alarm processing) is sent via the notification unit 305. Are displayed on the output unit 306 and alarmed by sound (step S17).
Note that, after step S17 ends, the determination unit 302 repeats steps S11 to S17 again. For this reason, even if only monitoring information from one detection unit is obtained within the first predetermined time in the first processing, the same monitoring area is monitored again within the first predetermined time during the next processing. It is determined whether or not the monitoring information from the two detection units is received.
The monitoring information is received as appropriate during the processing of FIG. 9 (for example, periodically or every time monitoring information is transmitted from the fire detector 10). When the monitoring information from the detection unit that monitors another monitoring area is received during the process 9, the same process as in FIG. 9 is performed in parallel for the other monitoring area.

Next, the fire determination of the determination unit 302 will be further described. The determination unit 302 determines that a fire has occurred in the following (1) or (2).
(1) Within the first predetermined time, monitoring information related to all (two in this case) detection units monitoring the same monitoring area is received, and it is determined that there is a fire from each of the two monitoring information Case (2) When it is determined that there is still a fire based on the first received monitoring information within the second predetermined time after the first predetermined time has elapsed. The determination unit 302 also determines whether the following (3) or (4 ), It is determined that there is no fire.
(3) When the fire resolution information related to the detection unit that transmitted the monitoring information received first is received within the first predetermined time and fire recovery is determined based on this (4) After the first predetermined time has elapsed In the case where it is not determined that there is still a fire based on the monitoring information related to the detection unit of the monitoring information received first within the second predetermined time from when the number of detection units monitoring the same monitoring area is three or more ( In 1), in addition to the case where a fire is determined based on the monitoring information relating to all the detection units, for example, a fire may be determined when a fire is determined for a predetermined number of 2 or more (1 ′). .
Further, when there are three or more detection units that monitor the same monitoring area, it is determined that there is a fire in the second predetermined time in (2), for example, when it is determined that there is a continuous fire for a predetermined number of two or more, for example. You may make it (2 ').
Corresponding to the cases (1 ') and (2') in such a case, it is determined that a predetermined number of restorations of 2 or more are determined for the conditions (3) and (4) that no fire has occurred. Can be substituted.

  FIG. 10 is a diagram for explaining the outline of the first predetermined time and the second predetermined time. In FIG. 10, the horizontal axis represents time. As shown in FIG. 10, when the determination unit 302 receives the first monitoring information in step S11 of FIG. 9 and determines fire based on this, the timer unit 304 starts measuring the corresponding timer (time t0). . During the period from time t0 to time t1 (first predetermined time), the determination unit 302 first receives the monitoring information received in step S11 and the other detection units monitoring the same monitoring area as the detection unit. Determine fire based on both monitoring information. If the fire recovery is not determined for the detection unit that transmitted the first monitoring information within the first predetermined time, and the fire determination is not performed based on the monitoring information from other detection units monitoring the same monitoring area, the time In the period from t1 to time t2 (second predetermined time), the determination unit 302 determines fire based on the monitoring information received first in step S11.

Next, an example of processing of the fire alarm system 1 will be described with reference to FIGS.
First, the example of FIG. 2 will be described. For example, the disaster prevention receiver 30 first receives monitoring information related to the first detection unit 11B of the fire detector 10B closest to the fire source 50, and determines a fire in the monitoring region 40B based on the monitoring information. If normal, the monitoring information related to the second detection unit 12C of the fire detector 10C is also received within the first predetermined time, and the fire in the monitoring area 40B is determined based on this. Accordingly, it is determined that a fire has occurred in the monitoring area 40B in the tunnel 40, and fire processing is performed as described in step S17 in FIG.

Next, an example of transient non-fire processing will be described with reference to FIG. FIG. 11 is a diagram illustrating an example in which the vehicle 60 is stopped in the monitoring area 40B. In the example shown in FIG. 11, the driver of the vehicle 60 uses a flame tube behind the vehicle 60. Here, the fire source 51 is assumed to be a fire source by a flame tube. The flicker center frequency of the flame tube is generally smaller than that of the fire flame, and normally it is not detected as a fire, but it is temporarily centered due to the driver shaking the flame tube by hand, etc. The frequency may coincide with a predetermined frequency (center frequency of fire flame). That is, the frequency when a person shakes a flame tube in his hand relatively close to the fire detector 10 happens to coincide with a predetermined frequency, for example, about 2 seconds (between 64 samplings at 32 Hz). If it continues, it may be detected as a fire by the fire detector 10. Here, such a case will be described as an example.
The disaster prevention receiver 30 first receives monitoring information from the first detection unit 11B of the fire detector 10B close to the fire source 51. Since the energy from the fire source 51 by the flame tube is lower than that of an actual fire flame, the detection signal level from the second detection unit 12C of the fire detector 10C located relatively far from the fire source 51 is small, and the fire detector Since the fire detection unit 130 of 10C does not detect a fire based on this, the fire detector 10C does not transmit monitoring information indicating that a fire has been detected to the disaster prevention receiver 30 even if the fire source 51 by the flame tube exists. Further, in the example of FIG. 11, the vehicle 60 blocks the line of sight of the fire source 51 from the second detection unit 12 </ b> C, so the fire detector 10 </ b> C does not detect the fire, and the disaster prevention receiver detects that the fire has been detected. The monitoring information indicated is not transmitted.
Therefore, in the example illustrated in FIG. 11, the determination unit 302 of the disaster prevention receiver 30 receives the monitoring information related to the first detection unit 11B from the fire detector 10B within the first predetermined time, but the fire detector 10C Monitoring information related to the second detection unit 12C is not received. For this reason, the determination unit 302 stands by without determining whether or not a fire has occurred within the first predetermined time. Next, within a second predetermined time after the first predetermined time has elapsed, the determination unit 302 is not based on the monitoring information related to the second detection unit 12C of the fire detector 10C, and the first detection unit of the fire detector 10B. Whether or not a fire has occurred is determined based on the monitoring information from 11B. Here, based on only the monitoring information related to the first detection unit 11B of the fire detector 10B, it is determined whether or not a fire has occurred. Here, the time during which the center frequency of the fire source 51 coincides with the predetermined frequency is usually shorter than the first predetermined time (the first predetermined time is set in consideration of this). Therefore, the determination unit 302 receives the monitoring information related to the first detection unit 11B of the fire detector 10B within the first predetermined time, determines that there is a fire, and outputs the notification information to the notification unit 305. You can avoid the situation.

Next, the case where the fire source 51 is caused by a fire in FIG. 11 will be described.
The disaster prevention receiver 30 first receives monitoring information related to the first detection unit 11B of the fire detector 10B close to the fire source 51, for example. On the other hand, the second detection unit 12C of the fire detector 10C that monitors the same monitoring area as the first detection unit 11B has the light (infrared rays) from the fire source 51 blocked by the vehicle 60. The light from 51 cannot be received. As a result, the disaster prevention receiver 30 does not receive the monitoring information related to the second detection unit 12C of the fire detector 10C within the first predetermined time.
Therefore, the determination unit 302 stands by without determining that a fire has occurred within the first predetermined time.
Next, within a second predetermined time after the first predetermined time has elapsed, the determination unit 302 is not based on the monitoring information related to the second detection unit 12C of the fire detector 10C, and the first detection unit of the fire detector 10B. Whether or not a fire has occurred is determined based on the monitoring information according to 11B. The first detector 11B of the fire detector 10B continuously transmits monitoring information because a fire has occurred in the monitoring area 40B (because the energy of the fire source 51 does not decrease). As a result, since the determination unit 302 receives the monitoring information related to the first detection unit 11B of the fire detector 10B within the second predetermined time, the determination unit 302 determines that a fire has occurred in the monitoring region 40B, and the notification information Is output to the reporting unit 305. Here, depending on the settings of the first predetermined time and the second predetermined time, the maximum time required to determine the fire may be slightly longer than in the past, but even in that case, in particular, temporary misinformation or non-fire Compared to the effect of reducing the information, it is not a big problem.

Next, for example, the signal cable 22 connected to the fire detector 10B is deteriorated, and temporary electrical noise is generated due to poor contact or the like. A case where a signal is transmitted to the disaster prevention receiver 30 will be described.
The disaster prevention receiver 30 receives, for example, monitoring information related to the first detection unit 11B based on noise from the fire detector 10B. As described above, even if monitoring information indicating that a fire due to noise has been detected is transmitted (or it is mistaken that the disaster prevention receiver 30 has received monitoring information indicating that a fire has been detected), it may be temporary Since the monitoring information indicating that a fire has been detected according to the other detection unit is not received, the disaster prevention receiver 30 does not determine that there is a fire.

  As described above, according to the present embodiment, it is possible to prevent a non-fire report such as when a flame generating cylinder is used in the monitoring area in the tunnel 40. Furthermore, even when a part of the monitoring area of one of the detection units that are adjacent and monitoring the same monitoring area is obstructed by a vehicle or the like when a fire occurs, the other fire detector 10 detects Based on the monitoring information, it can be determined whether or not a fire has occurred, and the occurrence of the fire can be detected. In other words, it is possible to reduce false alarms and non-fire reports due to transient fire detection based on false alarm sources and non-fire sources, while avoiding misreports that miss fire sources. Furthermore, even if the monitoring information is transmitted to the disaster prevention receiver 30 due to the influence of noise due to the deterioration of the signal cable 22 and the like, false alarms and non-fire alarms can be similarly reduced and misreporting can be avoided. Can do. In addition, when a temporary operation instability occurs in the fire detector 10 for some reason, and a fire is detected despite the fact that no fire has occurred, the false alarm is similarly reduced while reducing false alarms. Can be avoided.

Second Embodiment
In the present embodiment, an example will be described in which the disaster prevention receiver 30a selects the fire detector 10a used for fire determination according to the degree of contamination of the translucent windows 102 and 103 provided in the fire detector 10a. Note that the fire detectors 10a are arranged at regular intervals L with respect to the traveling direction of the vehicle, for example, as shown in FIG.

  FIG. 12 is a block diagram showing a main configuration of the fire detector 10a according to the present embodiment. As shown in FIG. 12, the fire detector 10a includes a first detection unit 11, a second detection unit 12, a fire detection unit 130, a transmission / reception unit 140a, an identification information setting unit 150, a test control unit 160, a light source control unit 171, A first light source 172, a light source control unit 181, a second light source 182, and a function diagnosis unit 190 are provided. Note that functions and components similar to those of the fire detector 10 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The transmission / reception unit 140a stores, in the identification information setting unit 150, unique identification information of each detection unit received from the disaster prevention receiver 30a (FIG. 14, described later). The transmission / reception unit 140a adds the identification information and the identifier stored in the identification information setting unit 150 to the monitoring information generated based on the detection signal output from the fire detection unit 130, and transmits the monitoring information to the disaster prevention receiver 30a. These are the same as the transmitter / receiver 140 of the fire detector 10 of the first embodiment shown in FIG. In the present embodiment, the identification information is information for identifying the fire detector 10a. The identifier is information for identifying the first detection unit 11 and the second detection unit 12. For example, the identifier for the first detection unit 11 is 1, and the identifier for the second detection unit 12 is 2.
The transmission / reception unit 140a extracts identification information from the test command received from the disaster prevention receiver 30a, and determines whether the extracted identification information matches the identification information stored in the identification information setting unit 150. The test command includes identification information for specifying the fire detector 10a to be subjected to the lighting test, and light source lighting instruction information for instructing lighting of the first light source or the second light source. That is, the test command is a command for testing the first detection unit 11 by turning on, blinking, or blinking (hereinafter collectively referred to as “lighting”), for example, the first light source 172. Is a command to test the second detection unit 12. When the extracted identification information matches the identification information stored in the identification information setting unit 150, the transmission / reception unit 140a outputs a test instruction signal corresponding to the test command to the test control unit 160.
The transmission / reception unit 140a includes the identification information stored in the identification information setting unit 150 in the contamination information output by the function diagnosis unit 190 as a test result performed by the test control unit 160 in response to the test command from the disaster prevention receiver 30a. And the identifier of the detection part which concerns on each information is added, and it transmits to the disaster prevention receiver 30a via the transmission line 20.
The contamination information is information indicating the contamination status of the translucent window. The information indicating the contamination status includes transmittance or dimming based on the signal level detected by the first detection element 111 when the first light source 172 is turned on. Rate, transmittance or attenuation based on the signal level detected by the second detection element 121 when the second light source 182 is turned on, or information determined based on the transmittance or attenuation (for example, the presence or absence of contamination). Is used. Such contamination of the translucent window is one of the functional failures of the fire detector 10a. The transmittance or the light attenuation rate may be calculated by the fire detector 10a or the disaster prevention receiver 30a based on the light reception level in the initial state of no fouling and the light reception level at the time of the test. Similarly, the determination of the degree of contamination based on the transmittance or the light attenuation rate may be determined by the fire detector 10a or the disaster prevention receiver 30a. The degree of contamination is a value determined according to the degree of contamination, and the transmittance or the light attenuation rate may be used as it is, or may be a stepwise index value corresponding to the transmittance or the light attenuation rate.
When a failure is detected by a built-in test periodically performed by the failure detection unit 192, the transmission / reception unit 140a notifies the failure information (identification information) at a timing corresponding to a periodic call from the disaster prevention receiver 30a. Is transmitted to the disaster prevention receiver 30a via the transmission line 20. The failure information is information indicating a failure of a component or circuit in the fire detector 10a. The failure is one of the functional failures of the fire detector 10a as well as the contamination.

The test control unit 160 extracts light source lighting instruction information from the test instruction signal output by the transmission / reception unit 140a, and outputs the extracted light source lighting instruction information to the light source control unit corresponding to the light source lighting instruction information.
The light source control unit 171 performs control so that the first light source 172 is lit with a predetermined amount of light for a predetermined time according to the light source lighting instruction output from the test control unit 160. The light source control unit 181 controls to turn on the second light source 182 with a predetermined amount of light for a predetermined time according to the light source lighting instruction output from the test control unit 160. The predetermined time is, for example, 2 seconds. The first light source 172 and the second light source 182 have a wavelength of light (in this case, 4.5 μm) that can be received by the first and second detection elements through the translucent window, for example, a flame emitted by a fire ) Is irradiated to the first and second detection elements.

The function diagnosis unit 190 includes a contamination degree detection unit 191 and a failure detection unit 192.
When the light source control unit 171 or 181 turns on the first light source 172 or the second light source 182, the contamination degree detection unit 191 indicates that the light reception signal in the first detection element 111 or the second detection element 121 of the corresponding detection unit is A / The detection signal A / D converted by the D converter 112 or 122 is received. For example, the contamination degree detection unit 191 calculates the transmittance of the translucent window based on the received detection signal, generates the contamination information of the content corresponding to the degree of contamination based on the calculated transmittance, and generates the generated contamination. The information is output to the transmission / reception unit 140a. Identification information and an identifier of a corresponding translucent window (detection unit) are added to the contamination information.
Next, specific processing in the case where the degree of contamination is determined by the degree of contamination detection unit 191 will be described.
The contamination degree detection unit 191 includes the level of the detection signal (for example, the amplitude detection value) of the first detection unit 11 or the second detection unit 12 obtained when the first light source 172 or the second light source 182 is turned on. Based on the initial detection signal level when the first light source 172 or the second light source 182 is turned on under the same lighting conditions in advance without contamination, the transmittance of the translucent window is calculated using the following equation (1).

  Transmittance [%] = (detection signal level / initial detection signal level) × 100 (1)

  Further, the contamination degree detection unit 191 can also calculate a light attenuation rate in addition to the transmittance as an index representing the degree of contamination using the following equation (2).

  Dimming rate [%] = 100− (detection signal level / initial detection signal level) × 100 (2)

  The failure detection unit 192 periodically performs a built-in test, detects a failure (circuit failure or the like) in the fire detector 10a as a functional failure, and outputs failure information indicating this failure to the transmission / reception unit 140a. Examples of functional units that are targets of failure detection include the A / D conversion unit 112, the A / D conversion unit 122, the fire detection unit 130, the test control unit 160, the light source control unit 171, and the light source control unit 181. For example, the failure detection unit 192 may output a signal for confirming a failure to each unit at a predetermined cycle, and may determine that the unit is a failure when there is no response to this signal.

FIG. 13 is a front view and a cross-sectional view of the fire detector 10a according to the present embodiment. In FIG. 13, the left-right direction (vehicle traveling direction) of the fire detector 10a in the installed state is the x-axis direction, the vertical direction of the fire detector 10a is the y-axis direction, and the thickness direction of the fire detector 10a is the z-axis direction. . The fire detector 10 a includes a cover 101, a main body 104, a test light source storage unit 108, a first light source 172, and a second light source 182. In addition, the function part which has a function similar to the fire detector 10 of 1st Embodiment uses the same code | symbol, and abbreviate | omits description.
The test light source storage unit 108 is disposed at the upper part of the translucent windows 102 and 103 in the y-axis direction. The test light source storage unit 108 stores the first light source 172 and the second light source 182.
The translucent window 102 is disposed between the first light source 172 and the first detection unit 11. The translucent window 103 is disposed between the second light source 182 and the second detection unit 12.

  FIG. 14 is a block diagram showing a main configuration of the disaster prevention receiver 30a according to the present embodiment. As shown in FIG. 14, the disaster prevention receiver 30a includes a transmission / reception unit 301a, a determination unit 302a, a storage unit 303, a timer unit 304, a notification unit 305a, an output unit 306a, a control unit 307, a function recognition unit 308, and a storage unit. 309. In addition, the function part which has a function similar to the disaster prevention receiver 30 of 1st Embodiment uses the same code | symbol, and abbreviate | omits description.

The transmission / reception unit 301a receives the monitoring information transmitted by the fire detector 10a, and outputs the received monitoring information to the determination unit 302a. The transmission / reception unit 301a transmits, for example, a test command output from the control unit 307 to the fire detector 10a at a predetermined cycle set in advance. The transmission / reception unit 301a outputs the contamination information received from the fire detector 10a to the control unit 307 according to the test command. The transmission / reception unit 301a transmits a periodic call to the fire detector 10a, and outputs failure information received from the fire detector 10a to the control unit 307 in response to the call.
The determination unit 302a determines whether a fire has occurred in the tunnel 40 based on the monitoring information received by the transmission / reception unit 301a and the information output by the timer unit 304. If the determination unit 302a determines that a fire has occurred in the monitoring area in the tunnel 40, the determination unit 302a outputs notification information indicating that a fire has occurred in the monitoring area to the notification unit 305a. The determination unit 302a receives the monitoring information first after starting the monitoring of the fire, and controls the timer unit 304 to start counting the first predetermined time in the corresponding timer when this information indicates a fire. To do.
When the contamination determination result received from the control unit 307 indicates that the detection unit cannot be used for fire monitoring, the determination unit 302a is set in advance as a corresponding timer of the timer unit 304 in association with the detection unit. Control is performed so as to start counting the third predetermined time (stained predetermined time) . The third predetermined time is, for example, 60 minutes. For example, if the translucent window 102 or 103 is temporarily dewed, the dewed state may be resolved after a certain period of time, and the transmittance may be restored to a normal value. The third predetermined time is determined in consideration of the time taken until the condensation is eliminated. You may make it determine 3rd predetermined time according to the transmittance | permeability of a translucent window, for example. Alternatively, the third predetermined time may be determined according to the time when the test is performed. For example, in a time zone where condensation is likely to occur, the third predetermined time may be determined to be 10 minutes.
When the failure determination result received from the control unit 307 indicates that the fire detector 10a cannot be used for fire monitoring, the determination unit 302a corresponds to the fire detector 10a or the detection unit, and the timer unit 304 The timer is controlled to start counting a predetermined fourth predetermined time (failure predetermined time) . The fourth predetermined time is, for example, 15 seconds to 20 seconds.
The timer unit 304 has a plurality of timers so that a plurality of times can be measured in parallel for each monitoring region or for each fire detector 10a and each detection unit.

The reporting unit 305a, based on the reporting information output from the determination unit 302a, information indicating that a fire has occurred, information indicating a monitoring area where a fire has occurred, and malfunction of the fire detector 10a The information indicating the contamination level and the information indicating the failure are output to the output unit 306a.
The output unit 306a includes a display unit 306a1 and a sound notification unit 306a2. The display unit 306a1 warns by displaying information indicating the content of the report according to the information obtained from the report unit 305a. The sound notification unit 306a2 issues an alarm by outputting an alarm sound or a sound corresponding to the content of the report according to the information obtained from the report unit 305a.
The control unit 307 generates a test command at a predetermined cycle, and outputs the generated test command to the transmission / reception unit 301a. In response, the transmission / reception unit 301a transmits a test command to the fire detector 10a via the transmission line 20. Note that the predetermined period is arbitrary, and is, for example, 1 hour, 24 hours, or the like. Similarly, the control unit 307 outputs a call signal for periodically calling the fire detector 10a to the transmission / reception unit 301a for failure information confirmation. The transmission / reception unit 301a receives this and transmits a calling signal to the fire detector 10a via the transmission path 20. Although the period in this case is arbitrary, it is 10 minutes, 30 minutes, etc., for example.
The control unit 307 outputs, to the function recognition unit 308, the contamination information output by the transmission / reception unit 301a receiving and outputting the reply from the fire detector 10a in response to the test command. In addition, the control unit 307 outputs the failure information returned from the fire detector 10a and received and output by the transmission / reception unit to the function recognition unit 308 at a timing corresponding to a periodic call for failure information confirmation.

The function recognition unit 308 includes a stain recognition unit 308a and a failure recognition unit 308b.
The stain recognition unit 308a extracts identification information, an identifier (detection unit), and a transmittance for each identifier from the stain information output by the control unit 307. The stain recognition unit 308a causes the storage unit 309 to store the extracted identification information, the identifier, and the transmittance of the translucent window of the detection unit of the fire detector 10a corresponding to the identifier. The contamination recognition unit 308a recognizes the contamination level based on the transmittance stored in the storage unit 309. The contamination recognition unit 308a determines whether each detection unit can be used for fire monitoring based on the recognized result, and the determination result, the extracted identification information, and the identifier are sent to the determination unit 302a. Output. In addition, when calculating the transmittance by the contamination degree detection unit 191 of the fire detector 10a and determining the contamination degree, the contamination information indicates whether each detection unit can be used for fire monitoring, and the contamination recognition unit 308a The fact is recognized and determined as it is, and the result of stain determination, identification information, and identifier are output to the determination unit 302a.
The failure recognition unit 308b extracts identification information from the failure information output by the control unit 307. The failure recognition unit 308b causes the storage unit 309 to store failure information of the detection unit of the fire detector 10a corresponding to the extracted identification information.
The failure recognition unit 308b recognizes the failure of the fire detector 10a based on the failure information of the detection unit stored in the storage unit 309, and whether each detection unit can be used for monitoring the fire based on the recognized result The failure determination result and the extracted identification information are output to the determination unit 302a. In the case where the failure content is specified for each detection unit, for example, when the failure content is a failure of the first detection element 111 or the second detection element 121, an identifier can be attached to the failure information together with the identification information, The failure recognition unit 308b can also recognize this. If the failure information includes an identifier, this is also stored in association with the failure information. In addition, when the failure information does not include the identifier of the detection unit (when the failure information is for each fire detector 10a), it is handled that both identifiers are associated and stored.

  Next, the procedure of the contamination monitoring process will be described. FIG. 15 is a flowchart showing an outline of the contamination monitoring process. This contamination monitoring process is performed using a test operation associated with a test command issued by the disaster prevention receiver 30a to the fire detector 10a, and is activated at a predetermined timing, for example, once every hour. Then, by sequentially transmitting test commands with identification information of the fire detector 10a, the contamination monitoring process is sequentially performed for each of the plurality of fire detectors 10a connected on the transmission path 20. That is, in this embodiment, the process of FIG. 15 is sequentially performed for each fire detector 10a.

The control unit 307 of the disaster prevention receiver 30a initializes the inspection target identifier N for identifying the detection unit to be inspected with N = 1, together with the identification information of the fire detector 10a to be inspected (tested). (Step S101). Next, the control unit 307 transmits the test command with the identifier of the detection unit corresponding to the currently set inspection target identifier N = 1 together with the identification information of the fire detector 10a to be inspected (tested). (Step S102). Next, the test control unit 160 of the fire detector 10a corresponding to the identification information turns on the first light source 172 by the light source control unit 171 corresponding to the first detection unit 11 of the identifier to be inspected according to the received test command. Let At this time, the contamination recognition unit 308a transmits the contamination information based on the result received by the first detection element 111 to the disaster prevention receiver 30a.
Next, the control unit 307 of the disaster prevention receiver 30a determines whether the contamination information has been received (step S103). When it is determined that the contamination information has been received (step S103; Yes), the control unit 307 proceeds to step S104. If the control unit 307 determines that the contamination information is not received (step S103; No), the control unit 307 repeats step S103 until the contamination information is received. Note that if the contamination information cannot be received even after a predetermined time has elapsed, the control unit 307 may retransmit (retry) the test command to the fire detector 10a. If the contamination information cannot be received even if the test command is retransmitted, the control unit 307 determines that the fire detector 10a of the identification information to which the test command is transmitted is abnormal, and performs, for example, an abnormal process in step S106. You may do it.

  Next, the stain recognition unit 308a extracts identification information, an identifier, and a transmittance from the stain information, and stores the extracted identification information, identifier, and transmittance in association with each other in the storage unit 309 (step S104). Next, the stain recognition unit 308a reads the transmittance stored in the storage unit 309 and determines whether or not the read transmittance is abnormal by comparing it with a reference value (step S105). For example, in the case of an abnormal value that is not normally considered, such as the transmittance exceeding 100%, the stain recognition unit 308a determines that the transmittance is abnormal. When the stain recognition unit 308a determines that the transmittance is abnormal (step S105; Yes), the process proceeds to step S106, and when it is determined that the transmittance is not abnormal (step S105; No), the process proceeds to step S107.

  When the transmittance is an abnormal value, the stain recognition unit 308a performs an abnormal process (step S106). Since the contamination recognition unit 308a has an abnormal transmittance, the timer unit 304 corresponds to the detection unit corresponding to the identifier of the fire detector 10a corresponding to the identification information to which the test command is transmitted. The corresponding timer is caused to start measuring the third predetermined time used by the determination unit 302a for fire determination. The stain recognition unit 308a proceeds to step S109 after step S106 ends.

When the transmittance is not an abnormal value in step S105, the stain recognition unit 308a determines whether or not the transmittance is, for example, a predetermined stain alarm threshold value 25% or less (step S107). When the contamination recognition unit 308a determines that the contamination warning threshold value is 25% or less (step S107; Yes), the process proceeds to step S108, and when it is determined that the contamination warning threshold value is greater than 25% (step S107; No), step S109. Proceed to
When the transmittance is less than or equal to the contamination warning threshold value 25%, the contamination recognition unit 308a outputs a contamination alarm from the display unit 306a1 and / or the sound notification unit 306a2 by the reporting unit 305a (step S108). This contamination alarm threshold value 25% is a transmittance corresponding to the limit degree of contamination at which the monitoring performance as a fire detector cannot be exhibited. Therefore, when the transmittance is 25% or less, normal fire monitoring cannot be performed unless the dirt of the light-transmissive window 102 of the fire detector 10a is cleaned. At this time, the contamination recognition unit 308a causes the corresponding timer of the timer unit 304 to start measuring the third predetermined time corresponding to the detection unit specified by this identifier based on the determined result.

Next, the control unit 307 increments the inspection object identifier N by one and proceeds to step S110 (step S109).
Next, the control unit 307 attaches an identifier corresponding to the current inspection object identifier N together with the identification information of the same fire detector 10a, and transmits a test command. Next, the test control unit 160 of the fire detector 10a corresponding to the identification information, in accordance with the received test command, the second light source 182 by the light source control unit 181 corresponding to the second detection unit 12 with the inspection target identifier N = 2. Lights up. At this time, the contamination degree detection unit 191 transmits the contamination information based on the result received by the second detection element 121 to the disaster prevention receiver 30a. In response, the stain recognition unit 308a repeats the same processing as steps S103 to S108 (step S110).
Next, the control unit 307 sets the inspection object identifier N to 1 and transmits a test command to the fire detector 10a to be tested next. In this way, the tests of steps S102 to S111 are performed on the detection units of all the fire detectors 10a (step S111).

Next, the operation of the disaster prevention receiver 30a will be described.
First, the determination unit 302a of the disaster prevention receiver 30a performs the same as steps S11 to S13 (see FIG. 9) of the first embodiment. In steps S11 to S13, the determination unit 302a identifies the fire detector 10a based on the identification information, and identifies the detection unit based on the identifier.
Based on the output of the timer unit 304 and the received monitoring information, the determination unit 302a determines a fire, for example, as described in (11) to (15) below.
(11) During the first predetermined time, the monitoring that is not timed for the third or fourth predetermined time corresponding to the monitoring information detection unit that is first determined to be fire for the monitoring area, and that is first determined to be fire When the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring region as the information detection unit is not being measured In this case, the determination unit 302a monitors the same monitoring region within the first predetermined time. Based on the monitoring information related to all (two in this case) detection units, the fire in the monitoring area is determined.
(12) During the first predetermined time, monitoring is being performed for the third or fourth predetermined time corresponding to the monitoring information detection unit first determined to be a fire for the monitoring area, and is first determined to be a fire. When the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring area as the information detection unit is not being measured In this case, the determination unit 302a first detects the monitoring information detected as a fire. Is monitored within the third or fourth predetermined time being counted, and the monitoring area based on the monitoring information related to the detection section that monitors the same monitoring area as the detection section of the monitoring information first determined to be a fire Determine the fire.
(13) Within the first predetermined time, the monitoring that is not time-measured for the third or fourth predetermined time corresponding to the monitoring information detection unit that is first determined to be fire for the monitoring area and that is first determined to be fire When the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring area as the information detection unit is being measured. In this case, the determination unit 302a detects the monitoring information first determined to be a fire. The monitoring unit that monitors the same monitoring area as the monitoring unit is excluded within the third or fourth predetermined time during timing, and the monitoring is performed based on the monitoring information related to the detection unit of the monitoring information first determined to be a fire. Determine the fire in the area.
(14) During the first predetermined time, monitoring is being performed for the third or fourth predetermined time corresponding to the monitoring information detection unit first determined to be a fire for the monitoring area, and is first determined to be a fire. When the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring area as the information detection unit is not being measured In this case, the determination unit 302a first detects the monitoring information detected as a fire. And the detection part which monitors the same monitoring area | region as the detection part of the monitoring information initially determined to be a fire is excluded within the 3rd or 4th predetermined time which is timing, and it waits.
(15) After waiting for (14), after the first predetermined time has elapsed and within the second predetermined time, the third or fourth time being measured corresponding to one of the detection units in the monitoring area When the measurement of the predetermined time has expired The determination unit 302a determines the fire in the monitoring area based on the monitoring information of the detection unit corresponding to the timer that has been timed for the third or fourth predetermined time being timed .

In the above (12) to (15), when the third or fourth predetermined time corresponding to one detection unit monitoring the same monitoring area is being measured, based on the monitoring information related to the other detection unit Although an example in which a fire is determined within the first predetermined time has been described, the present invention is not limited to this. For example, the determination unit 302a may determine a fire as in the following (12 ′), (13 ′), (12 ″), and (13 ″).
(12 ′) The timing of the third or fourth predetermined time corresponding to the monitoring information detection unit first determined to be a fire for the monitoring area has expired within the first predetermined time, and within the first predetermined time In the case where the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring region as the detection unit of the monitoring information first determined as a fire is not being measured, in this case, the determination unit 302a Based on the monitoring information related to all (two in this case) detection units that monitor the fire, the fire in the monitoring area is determined.
(13 ′) a monitoring information detection unit that is not time-measured for the third or fourth predetermined time corresponding to the monitoring information detection unit that is first determined to be a fire for the monitoring area and that is first determined to be a fire; When the timing of the third or fourth predetermined time corresponding to the detection unit that monitors the same monitoring area expires within the first predetermined time In this case, the determination unit 302a monitors all the same monitoring area ( Here, the fire in the monitoring area is determined based on the monitoring information relating to the two detection units.
(12 ″) During the first predetermined time, the third or fourth predetermined time corresponding to the monitoring information detection unit first determined to be fire for the monitoring area is being measured, and first determined to be fire. Monitoring that is determined to be the first fire within the second predetermined time and not during the third or fourth predetermined time corresponding to the detection unit that is monitoring the same monitoring area as the detection unit that received the monitored information In the case where the third or fourth predetermined time corresponding to the information detection unit is not timed In this case, the determination unit 302a waits for the first predetermined time and is first determined to be a fire within the second predetermined time. A fire in the monitoring area is determined based on monitoring information of at least one of the detection sections monitoring the same monitoring area as the monitoring information detecting section or the monitoring information detecting section first determined to be a fire.
(13 ″) During the first predetermined time, the third or fourth predetermined time corresponding to the monitoring information detection unit first determined to be fire for the monitoring area is not being measured, and is determined to be fire first. Of the monitoring information that is being measured for the third or fourth predetermined time corresponding to the detection unit that is monitoring the same monitoring area as the monitoring information detection unit, and that is first determined to be a fire within the second predetermined time. When the third or fourth predetermined time corresponding to the detection unit monitoring the same monitoring area as the detection unit is not being measured In this case, the determination unit 302a waits for the first predetermined time and within the second predetermined time In addition, based on the monitoring information of at least one of the detection unit that monitors the same monitoring area as the detection unit of the monitoring information first detected as a fire or the detection unit that received the monitoring information first determined as a fire. Determine a fire in the monitored area.
In addition, when the failure information does not include an identifier for identifying the detection unit because the failure content cannot be specified for each detection unit, such as a failure of the power supply circuit common to each detection unit or the fire detection unit 130, ( 12) to (14), (12 ′), (13 ′), (12 ″), (13 ″), the fire detector 10a corresponding to the identification information included in the failure information or the contamination information (all of them) May be excluded.

If the third predetermined time is set to a long time such as 10 minutes as in the above example, there is a high possibility that the timing of the third predetermined time has not expired within the first predetermined time. For this reason, for example, when the third predetermined time corresponding to the monitoring information detection unit first determined to be a fire for the monitoring area is being measured within the first predetermined time, or the monitoring information first determined to be a fire When the third predetermined time corresponding to the detection unit monitoring the same monitoring area as that of the detection unit is being measured, the determination unit 302a is not detecting the third predetermined time as in (12). A fire may be determined based on the monitoring information.
If the fourth predetermined time is set to a time such as 15 to 20 seconds as in the above example, there is a high possibility that the timing of the fourth predetermined time will expire within the first predetermined time. For this reason, for example, during the first predetermined time, when the fourth predetermined time corresponding to the monitoring information detection unit first determined to be fire for the monitoring area is being measured, or the monitoring first determined to be fire When the fourth predetermined time corresponding to the detection unit monitoring the same monitoring area as the information detection unit is being measured, the determination unit 302a is the same after the timer has expired as in (12 ′). You may make it judge the fire of the monitoring area | region based on the monitoring information which concerns on all the monitoring parts which are monitoring the monitoring area | region (here two).
As in the first embodiment, the number of detection units that monitor the same monitoring area may be three or more. In this case, for example, in (12), the detection unit that measures the third or fourth predetermined time is excluded from the judgment of the fire within the third or fourth predetermined time, and the third or fourth predetermined time is excluded. A fire is determined based on monitoring information relating to other detection units that are not timed.

As described above, in this embodiment, the light-transmitting windows 102 and 103 provided corresponding to the first or second detection unit of the fire detector 10a are detected to be dirty, and the light-transmitting windows are dirty. In this case, the detection unit corresponding to this is not used for the fire monitoring within the third predetermined time, and the same monitoring area is monitored, and the fire is judged based on the monitoring information from the non-fouling detection unit. I tried to do it. Further, in the present embodiment, when the failure of the first or second detection unit is detected and the detection unit is broken, the failed detection unit is not used for the fire monitoring within the fourth predetermined time, A fire was judged based on monitoring information from a non-failing detector that monitors the same monitoring area. As a result, according to the present embodiment, when the translucent windows 102 and 103 are dirty and the transmittance decreases and sufficient fire monitoring performance cannot be ensured, there is no response of monitoring information to the test command, or When the first or second detector is out of order, such a first or second detector of the fire detector 10a is not used for fire detection within the third predetermined time or the fourth predetermined time. While reducing false alarms, non-fire alarms can also be reduced and fires can be judged more accurately.
In the present embodiment, the example in which the disaster prevention receiver 30a calculates the transmittance and recognizes the contamination based on the calculated value is described. However, the fire detector 10a recognizes the contamination and the recognized result is the contamination information. May be transmitted to the disaster prevention receiver 30a. In this case, the disaster prevention receiver 30a recognizes that directly from the contamination information.

In addition, in 1st and 2nd embodiment, although the fire detector 10 and 10a demonstrated the example provided with two detection parts (the 1st detection part 11 and the 2nd detection part 12), it is not restricted to this. For example, the fire detectors 10 and 10a are provided with only the first detector 11 or only the second detector 12, and a set of the first detector 11 and the second detector 12 (fire detector 10, Two units 10a) may be arranged at the boundary of the monitoring area. In this case, the detection units of the two fire detectors 10 and 10a arranged at one boundary each monitor an adjacent monitoring area.
In addition, in 1st and 2nd embodiment, although the 1st detection part 11 and the 2nd detection part 12 of the fire detectors 10 and 10a each demonstrated the example provided with one detection element, it is not restricted to this. . Each of the first detection unit 11 and the second detection unit 12 may include two detection elements and detect light having different wavelengths. Thereby, a fire can be detected with higher accuracy.
In addition, the fire detector and the detection unit installed at the boundary part do not necessarily need to be installed on the same wall side as in the examples shown in FIGS. 2 and 11, and a plurality of detection units can monitor the same monitoring area. If it is installed in this way, for example, it is possible to install appropriately, for example, alternately on the opposite wall surface for each boundary.

  A program stored in a ROM (Read Only Memory) or the like connected to a CPU (Central Processing Unit) (not shown) that includes all or some of the functions of the fire alarm systems 1 and 1a in each embodiment. It is also possible to execute by.

DESCRIPTION OF SYMBOLS 1, 1a ... Fire alarm system 10, 10a, 10A, 10B, 10C, 10D ... Fire detector, 11, 11A, 11B, 11C, 11D ... 1st detection part, 12, 12A, 12B, 12C, 12D ... No. 2 detection units, 20 ... transmission path, 30, 30a ... disaster prevention receiver, 40 ... tunnel, 102, 103 ... translucent window, 111 ... first detection element, 121 ... second detection element, 130 ... fire detection unit, 140, 140a, 301, 301a ... transmission / reception unit, 150 ... identification information setting unit, 160 ... test control unit, 171, 181 ... light source control unit, 172 ... first light source, 182 ... second light source, 190 ... function diagnostic unit, 191: Degree of contamination detection unit, 192: Failure detection unit, 302, 302a ... Judgment unit, 303, 309 ... Storage unit, 304 ... Timer unit, 305, 305a ... Notification unit, 306, 306a ... Output , 306A1 ... display unit, 306A2 ... sound notification unit, 307 ... controller, 308 ... function recognition unit, 308a ... fouling recognition unit, 308b ... fault recognition unit

Claims (8)

A fire alarm system comprising a first detection unit and a second detection unit connected to a disaster prevention receiver and monitoring a fire in a common monitoring area,
Each of the first and second detectors is
Monitoring information according to the result of monitoring the fire in the monitoring area, and a transmission unit that transmits identification information assigned to itself to the disaster prevention receiver,
A translucent window;
A sensor that receives light energy from the monitoring region through the translucent window and converts it into an electrical signal;
A degree of contamination detection means for detecting the degree of contamination of the translucent window,
The disaster prevention receiver is
A storage unit that stores information associated with the identification information of each of the first and second detection units for each monitoring region;
A judgment unit for judging a fire,
The transmission unit transmits contamination information according to the contamination level detected by the contamination level detection means to the disaster prevention receiver,
The determination unit determines a contamination state of the translucent window based on the contamination information received from the transmission unit, and the contamination of one of the first and second detection units is the contamination of the translucent window. If determined, within a predetermined contamination predetermined time, do not use the monitoring information from the detection unit for fire determination, and determine a fire based on the monitoring information from the other detection unit ,
A fire alarm system. A fire alarm system comprising a first detection unit and a second detection unit connected to a disaster prevention receiver and monitoring a fire in a common monitoring area,
Each of the first and second detectors is
A monitoring unit according to a result of monitoring a fire in the monitoring area, and a transmission unit that transmits identification information assigned to the disaster prevention receiver,
The first or second detection unit includes:
A failure detection means for detecting its own circuit failure,
The disaster prevention receiver is
A storage unit that stores information associated with the identification information of each of the first and second detection units for each monitoring region;
A judgment unit for judging a fire,
The transmitter transmits the failure information detected by the failure detection means to the disaster prevention receiver,
The determination unit determines the circuit failure based on the failure information received from the transmission unit, and is determined in advance when one of the first and second detection units is determined as the circuit failure. Determining the fire based on the monitoring information from the other detection unit without using the monitoring information from the detection unit for the fire determination within a predetermined failure time ,
Fire alarm system shall be the features a. The monitoring area is any one of a plurality of areas divided in a road tunnel at predetermined intervals in the traveling direction of the vehicle,
The fire alarm system according to claim 1 or 2, characterized in that. A fire detector integrally including the first and second detection units is provided for each boundary of the monitoring area,
Said first and second detection portions of the fire detector, to monitor the surveillance area that are adjacent to each other,
Fire alarm system according to any one of claims 1 or we claim 3, characterized in. A first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area, and each of the first and second detection units monitored a fire in the monitoring area Monitoring information according to the result and identification information assigned to itself are transmitted to the disaster prevention receiver, a translucent window, and light energy from the monitoring area via the translucent window. A storage unit that stores the information associated with the identification information of each of the first and second detection units for each of the monitoring areas, and a sensor that receives the light and converts the sensor into an electrical signal. A fire determination method of a fire alarm system comprising a determination unit for determining a fire,
  A contamination degree detection means, a contamination degree detection procedure for detecting the contamination degree of the translucent window,
  The transmission unit transmits the contamination information according to the contamination degree detected by the contamination degree detection procedure and the identification information assigned to the transmission unit to the disaster prevention receiver,
  The determination unit receives the contamination information and the identification information transmitted by the transmission procedure, determines a contamination state of the translucent window based on the received contamination information, and the first and second When it is determined that one of the light-transmitting windows of the detection unit is contaminated, the monitoring information from the detection unit is not used for fire determination within a predetermined contamination predetermined time. A determination procedure for determining a fire based on the monitoring information of
  A fire judgment method for a fire alarm system including A fire alarm system that is connected to a disaster prevention receiver and includes a first detection unit and a second detection unit that monitor a fire in a common monitoring area, wherein each of the first and second detection units is the monitoring unit A transmission unit that transmits monitoring information according to a result of monitoring a fire in the area and identification information assigned to the region to the disaster prevention receiver, wherein the disaster prevention receiver includes the first and second detection units; A fire determination method of a fire alarm system comprising a storage unit that stores information associated with each identification information for each monitoring area, and a determination unit that determines a fire,
  A failure detection procedure in which the failure detection means detects its own circuit failure;
  The transmission unit transmits the failure information detected by the failure detection means and the identification information assigned to itself to the disaster prevention receiver,
  The determination unit receives the failure information and the identification information transmitted by the transmission procedure, determines the circuit failure based on the received failure information, and one of the first and second detection units When the circuit failure is determined, the monitoring information from the detection unit is not used for the fire determination within a predetermined failure predetermined time, and the fire is detected based on the monitoring information from the other detection unit. Judgment procedure to judge,
  A fire judgment method for a fire alarm system including A first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area, and each of the first and second detection units monitored a fire in the monitoring area Monitoring information according to the result and identification information assigned to itself are transmitted to the disaster prevention receiver, a translucent window, and light energy from the monitoring area via the translucent window. A storage unit that stores the information associated with the identification information of each of the first and second detection units for each of the monitoring areas, and a sensor that receives the light and converts the sensor into an electrical signal. A computer of the disaster prevention receiver in a fire alarm system comprising a determination unit for determining a fire,
  Receiving the contamination information according to the degree of contamination detected the degree of contamination of the translucent window transmitted by the transmission unit of the first and second detection units, and the identification information assigned to itself, Based on the received contamination information, the contamination state of the translucent window is determined, and when the contamination of one of the first and second detection units is determined, the predetermined state is determined in advance. A determination procedure for determining a fire based on the monitoring information from the other detection unit without using the monitoring information from the detection unit for a fire determination within a predetermined contamination time;
  A fire judgment program for a fire alarm system. A first detection unit and a second detection unit that are connected to a disaster prevention receiver and monitor a fire in a common monitoring area, and each of the first and second detection units monitored a fire in the monitoring area A monitoring unit that transmits monitoring information according to a result and identification information assigned to the disaster prevention receiver to the disaster prevention receiver, wherein the disaster prevention receiver includes identification information of each of the first and second detection units. In a computer of the disaster prevention receiver in a fire alarm system comprising a storage unit that stores associated information for each monitoring area, and a determination unit that determines a fire,
  Based on the received failure information, the failure information and the identification information detected by the first and second detection units transmitted by the transmission unit of the first and second detection units are detected. When the circuit failure is determined and one of the first and second detection units is determined as the circuit failure, the monitoring information from the detection unit is determined to fire within a predetermined failure time. Determination procedure to determine fire based on the monitoring information from the other detection unit,
  A fire judgment program for a fire alarm system.

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