JP6871013B2 - Disaster prevention system - Google Patents

Description

The present invention relates to a disaster prevention system that monitors a fire in a monitoring area divided into predetermined intervals in the longitudinal direction of a tunnel by a fire detection device connected to a signal line drawn from a disaster prevention receiver.

Conventionally, in tunnels such as motorways, in order to protect people and vehicles from fire accidents that occur in the tunnel, a fire detection device that monitors the fire is installed and connected to the signal line drawn from the disaster prevention receiver. ing.

The fire detection device is installed at the boundary of the monitoring area divided into, for example, 25 m intervals or 50 m intervals along the longitudinal direction of the tunnel, and the fire detection device has detection areas in both the left and right directions, and the fire detection devices are arranged adjacent to each other. The device monitors fires in the same monitoring area more than once.

In addition, the fire detector monitors the radiation from the fire flame generated in the tunnel through the translucent window, such as infrared rays, and monitors the dirt on the translucent window in order to maintain the flame monitoring function. doing.

To monitor the dirt on the translucent window, the test light is periodically emitted from the test light source provided in the fire detection device, enters the translucent window via the detection output area side space outside the detection device, and is received by the light receiving element. , The light receiving level at this time is compared with that at the time of initial non-staining to obtain the dimming rate as the fouling level, and when the fouling level exceeds a predetermined threshold value, a fouling signal is sent to the disaster prevention receiver and a fouling alarm is output. doing. Further, a stain predictive threshold lower than the stain threshold is set, and when the stain level exceeds the stain predictive threshold value, a stain predictive signal is transmitted to the disaster prevention receiver to output a stain predictive alarm.

Furthermore, since the fire detection device installed in the tunnel increases the dirt on the translucent window over time due to the adhesion of pollutants floating in the environment, the translucent window is cleaned at regular intervals. It is carried out.

Here, as for the fouling of the fire detection device when the fouling sign alarm is output from the disaster prevention receiving panel, the fouling of the translucent window is progressing, but the entire monitoring area can be monitored. On the other hand, as for the pollution of the fire detection device for which the pollution warning is output from the disaster prevention receiver, the transparency of the translucent window is further deteriorated and the entire monitoring area cannot be monitored, and a part of the monitoring area close to the fire detection device Only the fire detection device that issued the pollution alarm needs to be cleaned because the monitoring function of overlapping monitoring of the same monitoring area by the adjacent fire detection device is impaired.

Japanese Unexamined Patent Publication No. 2000-315285

However, when the same monitoring area is repeatedly monitored by such adjacent fire detection devices, one of the adjacent fire detection devices in the disaster prevention receiving panel is a sign of contamination. In this case, although the entire monitoring area is normally monitored by the other fire detection device that is not a sign of fouling, a foul sign warning is notified corresponding to the monitoring area. Dealing with alarms at the stage is not urgent. In particular, if such a non-urgent dirt sign warning is issued at the same time for a plurality of monitoring areas, there is a risk that the original fire monitoring work will be hindered.

An object of the present invention is to provide a disaster prevention system that enables appropriate monitoring work by optimizing the alarm display on the disaster prevention receiver for pollution when the monitoring area is repeatedly monitored by a fire detection device. ..

(Disaster prevention system)
The present invention, the radiation from the monitoring area to the receiving device, in the disaster prevention system connecting a plurality of sensing devices for monitoring the fire monitoring area by receiving through a translucent window,
The receiving device monitors based on the fouling status of the translucent window of any detection device that monitors the monitoring area and the fouling status of the translucent window of another detection device that monitors the same monitoring area. It is characterized in that the status of a failure is determined and a process corresponding to the determination result (a process of notifying the determination result) is performed.

(Another form of disaster prevention system)
In another embodiment of the invention,
In a disaster prevention system in which multiple fire detection devices are connected to the receiving device
The fire detector is
A light receiving part that receives radiation from the monitoring area through a translucent window and converts it into an electrical signal,
A fire judgment unit that determines the presence or absence of a fire in the corresponding monitoring area based on the electrical signal from the light receiving unit,
By detecting the damage level of the translucent window corresponding to the light receiving unit, and transmits the damage level, when the translucent window is found to be a predetermined fouling indication state, fouling indication signal to the receiving device, from damage level, and fouling processing unit translucent window when deemed fouling is a predetermined fouling advanced state than the fouling predictive state, and transmits the fouling signal indicating the fouling of the light receiving portion to the receiving device,
Equipped with a,
The receiving device determines that it is a monitoring failure sign of the corresponding monitoring area based on the relationship between the presence or absence of a fouling sign state of multiple fire detection devices that are arranged adjacent to each other and monitor the same monitoring area in duplicate. Therefore, it is characterized in that it is provided with a control unit that performs processing corresponding to the determination result.

(Premonition of pollution x sign of pollution = sign of monitoring failure)
Controller of the receiving apparatus, based on the fouling indication signal and fouling signal, when all of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes soiled predictive state, corresponding monitoring failure of the monitor area The sign is judged, and the process corresponding to the judgment result is performed .

(Dirt x normal / stain sign / stain = monitoring failure)
Controller of the receiving device, when at least part of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes soiled state, it is determined that the monitoring failures corresponding monitoring area, determined Perform the processing corresponding to the result .

(Sign of pollution x pollution = sign of monitoring failure)
The control unit of the receiving apparatus, when a part of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes others the contamination state fouling predictive state, monitoring failure predictor corresponding monitoring area it is determined that, the processing corresponding to the determination result.

(Contamination symptom state and fouling state)
The fouling sign state is set as a fouling level range in which the entire monitoring area can be monitored by the light receiving unit in the state .
Fouling state is set as the damage level range some or impossible entire monitoring by Ri monitoring area to the light receiving portion in the state.

(Effect of disaster prevention system)
The present invention, the radiation from the monitoring area to the receiving device, in the disaster prevention system connecting a plurality of sensing devices for monitoring the fire monitoring area by receiving through the translucent window, the receiving device monitoring Determine the status of monitoring failure based on the fouling status of the translucent window of any detector monitoring the area and the fouling status of the translucent window of other detectors monitoring the same monitoring area. Then , the process corresponding to the judgment result (the process of notifying the judgment result) is performed , so that the monitoring on the system is performed according to the state of the translucent window such as normal (non-staining), stain sign, and stain. It is possible to appropriately evaluate and notify the performance failure status (monitoring failure sign, monitoring failure).

(Effects of other forms of disaster prevention system)
In another embodiment of the present invention, in a disaster prevention system in which a plurality of fire detection devices are connected to a receiving device, the fire detection device receives radiation from a monitoring area through a translucent window and receives electricity. The light receiving part that converts to a signal, the fire judgment part that determines the presence or absence of a fire in the corresponding monitoring area based on the electric signal from the light receiving part, and the contamination level of the translucent window corresponding to the light receiving part are detected. from damage level, when the translucent window is found to be a predetermined fouling indication state, transmits a defacement sign signal to the receiving device, the damage level, translucent window fouling than fouling indication state If found to be a predetermined fouling advanced state, and a fouling processing unit for transmitting the fouling signal indicating the fouling of the light receiving portion to the receiving device, the receiving device, the same is arranged adjacent to each other based on the pollution sign state occurrence or non-occurrence of a relationship between a plurality of fire detection apparatus for monitoring duplicate monitoring area, it is determined that the monitoring failure predictor of the corresponding monitoring area, and a control unit for the processing corresponding to the determination result Therefore, if the signs of pollution of multiple fire detection devices that monitor the same monitoring area more than once are less than the specified ratio to the specified number, for example, the entire monitoring area by the fire detection devices that have not reached the signs of pollution. Since the monitoring of the above is guaranteed, the receiving device does not notify the monitoring area as a sign of a monitoring failure, and it is not necessary to respond by notifying an unnecessary sign of a monitoring failure to the monitoring area, and the original monitoring work is smooth. Enables execution.

In addition, when the signs of contamination of a plurality of fire detection devices that monitor the same monitoring area in duplicate reach a predetermined ratio to a predetermined number of all, for example, the entire monitoring area is monitored by the plurality of fire detection devices. In this case, the receiving device notifies the monitoring failure sign of the corresponding monitoring area to call attention, and then the fire detection device that monitors the same monitoring area is contaminated. When a signal is received, it is determined that the duplicate monitoring function by multiple fire detection devices for the same monitoring area has been lost, and by notifying the monitoring failure, cleaning work is prepared for the fire detection device that has reached pollution. By executing it, it is possible to take appropriate measures.

(Staining sign x Contamination sign = Effect of monitoring failure sign)
The control unit of the receiving apparatus, contamination based on the sign signal and the fouling signal, when all of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes soiled sign state, the corresponding monitoring area Since the monitoring failure sign is judged and the processing corresponding to the judgment result is performed, one of the adjacent fire detection devices that additionally monitors the monitoring areas divided at predetermined intervals toward the tunnel longitudinal direction and the like. If is a sign of pollution, the other fire detection device that has not reached the sign of pollution guarantees monitoring of the entire monitoring area, so the receiving device does not notify it as a sign of a monitoring failure in the corresponding monitoring area. It makes it possible to smoothly carry out the original monitoring work by eliminating the need to respond by notifying unnecessary monitoring failure signs to the monitoring area.

In addition, duplicate monitoring of the entire monitoring area by both fire detection devices is no longer guaranteed, and there is a high possibility of a pollution failure. In this case, the receiving device notifies the monitoring failure sign of the corresponding monitoring area. To call attention.

(Dirt x normal / stain sign / sign = effect of monitoring failure)
The control unit of the receiving apparatus, when at least a portion of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes soiled state, it is determined that the monitoring failures corresponding monitoring area Because the processing corresponding to the judgment result is performed , for example, after both of the fire detection devices that monitor the same monitoring area in duplicate reach the pollution sign and the monitoring failure sign is notified, one of them. When the fire detection device in the above becomes dirty, it is judged that the duplicate monitoring function by the adjacent fire detection device for the same monitoring area has been lost, and the monitoring failure is notified to clean the fire detection device that has reached the pollution. Enables appropriate response to prepare and execute work.

(Staining sign x Contamination = Effect of monitoring failure sign)
The control unit of the receiving apparatus, when a part of the fire detection apparatus for monitoring a duplicate of the same monitoring area to each other becomes others the contamination state fouling predictive state, corresponding monitoring of the monitoring area Since it is judged as a failure sign and processing is performed according to the judgment result, the monitoring area cannot be duplicated because one is a pollution sign and the other is a pollution, but the fire detection device for the pollution sign covers the entire monitoring area. In addition, the fire detection device for signs of fouling monitors a part of the monitoring area in duplicate, so it is not immediately considered as a monitoring failure, but at this stage it is evaluated as a sign of monitoring failure and the monitoring failure in the monitoring area. A sign may be notified to call attention.

(Effect of contamination predictive state and fouling state)
Further, fouling predictor state is set as the damage level range can be all of the monitoring of the monitor area by the light receiving portion in the state, fouling conditions, some or all of the monitor area Ri by the light receiving portion in the state Since it is set as a pollution level range that cannot be monitored, even if some of the multiple fire detection devices that monitor the same monitoring area in duplicate reach a pollution sign, the monitoring sign warning is not issued and the same monitoring area is used. For example, when all of the multiple fire detection devices that are monitoring the same monitoring area in duplicate, when all of them become pollution signs, the monitoring failure sign of the monitoring area is notified, and then a plurality of multiple fire detection devices that are monitoring the same monitoring area in duplicate. When a part of the fire detection device becomes dirty, it is possible to notify the monitoring failure of the monitoring area.

Explanatory drawing showing the outline of the disaster prevention system according to the present invention by taking fire monitoring in a tunnel as an example. Explanatory drawing showing the monitoring area in the tunnel to be duplicated monitored by the fire detection device Block diagram showing the outline of the functional configuration of the fire detection device Explanatory drawing showing the appearance of the fire detection device Block diagram showing the outline of the functional configuration of the disaster prevention receiver Explanatory diagram showing a list of monitoring failure signs and monitoring failure judgment conditions set on the disaster prevention receiver Flowchart showing monitoring control by disaster prevention receiver

[Outline of disaster prevention system]
FIG. 1 is an explanatory diagram showing an outline of a disaster prevention system according to the present invention, taking a tunnel fire monitoring as an example. As shown in FIG. 1, an up line tunnel 1a and a down line tunnel 1b are constructed as tunnels for automobile-only roads.

Inside the up line tunnel 1a and the down line tunnel 1b, fire detection devices 16 are installed along the wall surface in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. By providing two sets of detection units, the fire detection device 16 has monitoring areas in both the ascending side and the descending side in the longitudinal direction of the tunnel, and is adjacent to the fire detecting apparatus arranged along the longitudinal direction of the tunnel. The monitoring areas are arranged continuously so as to overlap.

A power supply and transmission lines 12a and 12b are pulled out from the disaster prevention receiving panel 10 functioning as a receiving device to the up line tunnel 1a and the down line tunnel 1b, and the fire detection device 16 is connected to the fire detection device 16. Addresses are preset in the order of predetermined arrangement directions.

FIG. 2 is an explanatory diagram showing a monitoring area in a tunnel that is duplicated and monitored by a fire detection device, and the up line tunnel 1a of FIG. 1 is taken as an example.

As shown in FIG. 2, fire detection devices 16 are installed along the tunnel side wall of the up line tunnel 1a at intervals of, for example, 50 meters. _{This divides the tunnel into monitoring areas A 1} , A ₂ , ... A _i-1 , A _i , A _{i + 1} , ... at intervals of 50 meters in the longitudinal direction, and installs a fire detection device 16 at the boundary. .. Each monitoring area has a size of, for example, 50 m in the longitudinal direction x 20 m in the lateral direction.

The fire detection device 16 is provided with two sets of detection units that individually monitor the monitoring areas on both the left and right sides. For convenience, the right side of the fire detection device is the right eye detection unit, and the left side is the left eye detection unit. For example, the i-th fire detection device 16 and the i + 1th fire detection device 16 arranged at both ends of the monitoring area Ai monitor the monitoring area Ai by the right eye detection unit of the i-th fire detection device 16, and at the same time. The same monitoring area Ai is monitored in duplicate by the left eye light receiving unit of the i + 1th fire detection device 16.

The first monitoring area A1 on the tunnel entrance side is independently monitored by the left eye detection unit of the first fire detection device 16.

The fire detection device 16 monitors a fire by observing radiation from a flame caused by a fire occurring in the monitoring area, for example, infrared rays, and when a fire is detected, for example, a fire signal including a preset unique address. Is transmitted to the disaster prevention receiver 10.

Further, the fire detection device 16 monitors the fouling of the translucent windows provided in the right eye and the left eye detection unit, and when the fouling level reaches a predetermined fouling sign threshold value, the fouling sign signal is received for disaster prevention. It is transmitted to the board 10, and when the fouling level reaches a predetermined fouling threshold value, a fouling signal is transmitted to the disaster prevention receiving board 10.

[Fire detector]
FIG. 3 is a block diagram showing an outline of the functional configuration of the fire detection device, and FIG. 4 is an explanatory view showing the appearance of the fire detection device.

As shown in FIG. 3, the fire detection device 16 includes two sets of fire detection units 16a and 16b, which correspond to a right eye detection unit and a left eye detection unit, respectively. As represented by the fire detection unit 16a, the light receiving units 38a and 38b including the light receiving sensor, the amplification processing units 40a and 40b corresponding to each of them, the control unit 32 and the transmission unit 34 are provided. A translucent window 36 provided on the detector cover (housing 52 in FIG. 4) is arranged in front of the light receiving portions 38a and 38b, and the light energy from the external monitoring area is arranged through the translucent window 36. Is incident on the light receiving units 38a and 38b.

Moreover, for monitoring fouling of the translucent window 36, the contamination detection unit 45 is provided that constitutes a test light source unit 42, the test light source translucent window 56, fouling the light receiving unit 44 and the amplifying unit 46.

Here, as shown in FIG. 4, in the fire detection device 16, two sets of translucent windows 36 are provided in the sensor storage portion 54 provided in the upper part of the housing 52, and each of the translucent windows 36 is provided. The light receiving units of the fire detection units 16a and 16b shown in FIG. 3 are arranged therein. Further, in the vicinity of the translucent window 36, a position of sight of the light receiving portion, the light transmitting window 56 is provided for two pairs of test light source accommodating individual test light source unit 42.

Referring to FIG. 3 again, the fire detection unit 16b has the same configuration as the fire detection unit 16a, but the control unit 32 is provided as a unit common to both, for example, a CPU, a memory, and various input / output ports as hardware. A computer circuit or the like provided with the above is used. Further, the control unit 32 is provided with a fire determination unit 48 and a stain treatment unit 50 as functions realized by executing the program.

The fire detection unit 16a monitors a fire by, for example, a two-wavelength flame detection principle. The light receiving unit 38a uses an optical wavelength bandpass filter to emit radiation having a wavelength of 4.4 to 4.5 μm, which is a resonance radiation band of _{CO 2} peculiar to flames, from the light energy incident through the translucent window 36. After selective transmission, the energy of the radiation is received by the light receiving sensor, photoelectric conversion is performed, and then predetermined processing such as amplification is performed by the amplification processing unit 40a to obtain a light receiving signal corresponding to the amount of light receiving energy and output to the control unit 32. To do.

The light receiving unit 38b selectively transmits radiant energy having a wavelength of 5 to 6 μm from the light energy incident through the translucent window 36 by an optical wavelength bandpass filter, and receives the energy of the radiation by a light receiving sensor. After photoelectric conversion, the amplification processing unit 40b performs a predetermined process such as amplification to obtain a light receiving signal corresponding to the amount of light receiving energy and outputs it to the control unit 32.

The fire determination unit 48 provided in the control unit 32, for example, takes a relative ratio of the received signal levels output from the amplification processing units 40a and 40b, determines the presence or absence of a flame by comparing with a predetermined threshold value, and determines the presence or absence of a flame. If it is determined to be present, the transmission unit 34 is instructed to set fire detection information in the response message to the call message matching the self-address from the disaster prevention receiving board 10 and control the transmission to the disaster prevention receiving board 10. ..

The stain detection unit 45 composed of the test light source unit 42, the stain light receiving unit 44, and the amplification unit 46 has a test light source unit 42 in a predetermined cycle, for example, once a day, according to an instruction from the stain treatment unit 50 of the control unit 32. Flashes to emit a predetermined test light, which is incident on the foul light receiving unit 44 through the translucent window 36, and this test light is converted into an electric signal by a light receiving sensor provided in the foul light receiving unit 44 and amplified. Amplification is performed by the unit 46, and a stain detection signal corresponding to the degree of contamination of the translucent window 36 is output to the control unit 32. The control of the predetermined cycle may be performed inside the fire detection device, or may be controlled on the disaster prevention receiving panel 10 side and performed in response to an implementation instruction by a telegram.

When the fouling level based on the fouling detection signal from the amplification unit 46 exceeds a predetermined fouling sign threshold value, the fouling processing unit 50 of the control unit 32 sets the self-address from the disaster prevention receiver 10 via the transmission unit 34. Control is performed to set the pollution sign information in the response message to the matching call message and transmit it to the disaster prevention receiver 10.

Further, the fouling processing unit 50 of the control unit 32 receives disaster prevention via the transmission unit 34 when the fouling level based on the fouling detection signal from the amplification unit 46 exceeds a predetermined fouling threshold value higher than the fouling predictive threshold. Control is performed to set pollution information in the response message to the call message that matches the self-address from the board 10 and send it to the disaster prevention receiving board 10.

Here, the fouling treatment unit 50 of the control unit 32 obtains the dimming rate of the translucent window 36 indicating the degree of fouling based on the fouling detection signal from the amplification unit 46, and uses this dimming rate as the fouling level to predict the fouling and Performs stain determination processing. The fouling treatment unit 50 calculates the dimming rate of the translucent window 36 based on the level of the fouling detection signal at the start of fire monitoring or the end of cleaning of the translucent window 36 when the translucent window 36 is not contaminated. It is stored in advance as Er, and each time a stain detection signal of detection level E is obtained from the amplification unit 46, the dimming rate D is set to D = 1- (E / Er).
Calculate as.

The dimming rate D calculated in this way is a value that increases in proportion to an increase in the degree of fouling of the translucent window 36, and in the following description, the dimming rate will be described as a fouling level.

Further, the stain predictive threshold value used by the stain processing unit 50 for determining the stain sign is a predetermined number that allows the light receiving units 38a and 38b to continue to monitor the entire monitoring area even though the translucent window 36 is dirty. It is set to a fouling level of 1, for example, a dimming rate of 75 percent.

Further, the fouling threshold value used by the fouling treatment unit 50 for determining fouling is set to a predetermined second fouling level at which part or all of the monitoring area by the light receiving unit cannot be monitored, for example, a dimming rate of 85%.

[Disaster prevention receiver]
FIG. 5 is a block diagram showing an outline of the functional configuration of the disaster prevention receiver. As shown in FIG. 5, the disaster prevention receiving panel 10 includes a control unit 18, and the control unit 18 is a function realized by executing a program, for example, and includes a CPU, a memory, various input / output ports, and the like as hardware. Use a computer circuit, etc.

Transmission units 20a and 20b are provided for the control unit 18, and fire detection devices 16 installed in the up line tunnel 1a and the down line tunnel 1b are provided on the transmission lines 12a and 12b drawn from the transmission units 20a and 20b, respectively. Multiple units are connected.

Further, the control unit 18 has an alarm unit 22 equipped with a speaker, an alarm indicator, etc., a display unit 24 equipped with a liquid crystal display, a printer, etc., an operation unit 26 equipped with various switches, and an IG element that communicates with external monitoring equipment. A modem 28 for connecting station equipment is provided, and an IO unit 30 for connecting ventilation equipment, alarm display board equipment, radio rebroadcasting equipment, camera monitoring equipment, lighting equipment, fire extinguishing pump equipment, and the like is provided.

The control unit 18 of the disaster prevention receiver 10 repeatedly transmits a call message including a polling command instructing the transmission units 20a and 20b to sequentially specify the address of the fire detection device 16, and the fire detection device 16 is set to its own address. When a matching call message is received, a response message indicating its own detection status including information such as fire, pollution sign, and pollution is returned.

When the control unit 18 of the disaster prevention receiving panel 10 detects a fire by receiving the response telegram from the fire detection device 16, it instructs the alarm unit 22 to output a fire alarm and also instructs the IO unit 30 to send it to other equipment. Interlocking control is performed.

[Notification of monitoring failure sign and monitoring failure by disaster prevention receiver]
The control unit 18 of the disaster prevention receiver 10 monitors the monitoring area that is duplicated by the adjacent fire detection device 16 based on the pollution sign information and the pollution information set in the response message received from the fire detection device 16. It is equipped with a function to determine and notify a failure sign and monitoring failure. In the following description, the response message in which the pollution sign information is set is referred to as a pollution sign signal, and the response message in which the pollution sign information is set is referred to as a pollution signal.

(Notification of signs of monitoring failure)
The control unit 18 of the disaster prevention receiving panel 10 has a number of those having a pollution sign with respect to the total number of a plurality of fire detection devices 16 that monitor an arbitrary same monitoring area based on the pollution sign signal received from the fire detection device 16. , When a predetermined threshold value set as a predetermined ratio is reached, a monitoring failure sign of the corresponding monitoring area is notified.

In the present embodiment, as shown in FIG. 2, since the same monitoring area is monitored by the adjacent fire detection devices 16 in duplicate, the total number of the plurality of fire detection devices 16 that monitor the same monitoring area is When the number of fire detection devices 16 in a pollution sign state exceeds a predetermined threshold value set as a predetermined ratio, the control unit 18 exceeds, for example, 50% set as a predetermined threshold value. When the two fire detection devices 16 become a sign of fouling, the sign of a monitoring failure in the corresponding monitoring area is notified.

For example, taking the monitoring area Ai in FIG. 2 as an example, even if one of the two fire detection devices 16 of the i-th and the i + 1th arranged adjacent to the monitoring area Ai is a sign of pollution, the other At this stage, the control unit 18 does not notify the monitoring failure sign because the fire detection device 16 of the above has not reached the pollution sign state.

On the other hand, when both the i-th and i + 1-th two fire detection devices 16 arranged adjacent to the monitoring area Ai are in a pollution sign state, the entire area of the monitoring area Ai is monitored. Since the function may be impaired soon, the control unit 18 will notify the monitoring failure sign of the monitoring area Ai.

The control unit 18 notifies the alarm unit 22 to output a voice message, an alarm sound, etc. indicating the monitoring failure sign, and also instructs the display unit 24 to correspond to the monitoring area on the liquid crystal display. Display that a sign of a monitoring failure has occurred.

(Notification of monitoring failure)
When the control unit 18 of the disaster prevention receiving panel 10 receives the pollution signal from the fire detection device 16, it notifies the monitoring failure of the corresponding monitoring area according to the situation.

In the present embodiment, as shown in FIG. 2, the same monitoring area is monitored by the adjacent fire detection devices 16 in an overlapping manner, and both of the adjacent fire detection devices 16 become pollution signs prior to the pollution. When the control unit 18 of the disaster prevention receiving panel 10 notifies the monitoring failure sign, and then receives a pollution signal from at least one of the fire detection devices 16 adjacent to the monitoring area where the monitoring failure sign is notified. , The monitoring failure corresponding to the monitoring area will be notified.

(Monitoring failure sign and monitoring failure judgment conditions)
FIG. 6 is an explanatory diagram illustrating a list of monitoring failure signs and monitoring failure determination conditions set on the disaster prevention receiver, and the determination conditions of the monitoring area Ai shown in FIG. 2 are taken as an example.

The monitoring area Ai is monitored by the right eye side fire detection unit of the i-th fire detection device 16 and the left eye fire detection unit of the i + 1th fire detection device 16, but here, the right eye and the left eye are monitored. The explanation will be omitted.

As shown in FIG. 6, the i-th and i + 1-th fire detection devices 16 are arranged adjacent to the monitoring area Ai to monitor the monitoring area Ai in an overlapping manner.

Mode 1 is a normal state in which the fouling levels of these two adjacent fire detection devices 16 do not reach the fouling sign threshold value, and in this case, the alarm notification is not performed.

Modes 2 and 3 are cases where one of the two adjacent fire detection devices 16 is a sign of fouling, and the entire monitoring area Ai is monitored by the fire detection device 16 which is not a sign of fouling. Therefore, the alarm is not notified.

Mode 4 is a case where both of the adjacent fire detection devices 16 are signs of fouling, and when one or both of the fire detection devices 16 later shift to a fouling state, the duplicate monitoring function of the entire monitoring area Ai is activated. Since it will be lost, the monitoring failure sign of the monitoring area Ai is notified.

Modes 5 and 6 are cases in which one of the fire detection devices 16 becomes dirty after both of the adjacent fire detection devices 16 become pollution signs and the monitoring failure sign is notified, and the monitoring area Ai Since there is a part in which duplicate monitoring cannot be performed, a monitoring failure in the monitoring area Ai is notified.

Modes 7 and 8 are cases where one of the adjacent fire detection devices 16 is normal and the other is contaminated. Although the normal fire detection device 16 monitors the entire monitoring area Ai, the entire monitoring area is monitored. Since the duplicate monitoring function of the above is lost, the monitoring failure of the monitoring area Ai is notified.

Mode 9 is a case where both of the adjacent fire detection devices 16 are contaminated, and since there is a portion that cannot be monitored in the monitoring area Ai, a monitoring failure in the monitoring area Ai is notified.

The conditions for determining such a monitoring failure sign and a monitoring failure are the same for other monitoring areas that are overlap-monitored by the fire detection devices 16 arranged adjacent to each other.

On the other hand, in the monitoring area of the entrance and exit of the tunnel, for example, the monitoring area A1 of FIG. 2, only the first fire detection device 16 is monitored, and the control unit 18 of the disaster prevention receiving panel 10 monitors the fire detection device 16. When the fire detection device 16 becomes dirty, the monitoring failure sign of the monitoring area A1 is notified, and when the fire detection device 16 becomes dirty, the monitoring failure is notified.

In modes 5 and 6 of FIG. 6, one fire detection device is a sign of pollution and the other fire detection device is a sign of pollution. In this case, the alarm is not a monitoring failure shown in the figure, but a monitoring failure sign. May be. At this time, the fire detection device for the sign of pollution monitors the entire monitoring area, and the fire detection device for the sign of pollution duplicates and monitors a part of the monitoring area. Therefore, the monitoring failure does not occur immediately. At this stage, it may be evaluated as a sign of a monitoring failure, and the sign of a monitoring failure in the monitoring area may be notified to call attention. In addition, a modified example such as treating modes 7 and 8 of FIG. 6 as a sign of a monitoring failure can be adopted.

Further, the warning of a monitoring failure may be alarmed as a sign of contamination of the monitoring area, and the monitoring failure may be alerted as a pollution of the monitoring area.

(Control operation of disaster prevention receiver)
FIG. 7 is a flowchart illustrating monitoring control by the disaster prevention receiving board 10 of FIG. 5, and is a control operation of the control unit 18 provided on the disaster prevention receiving board 10.

As shown in FIG. 7, the control unit 18 of the disaster prevention receiving panel 10 receives a response message to the call message to the fire detection device 16 installed in the tunnel in step S1 and monitors the presence or absence of a fire. When fire information is detected from the response message, the alarm unit 22 is instructed to output a fire alarm, and the IO unit 30 is instructed to perform interlocking control of other equipment.

Following the fire monitoring process in step S1, when the control unit 18 determines in step S2 that the fire detection signal has been received from the fire detection device 16, the process proceeds to step S3, from the address of the fire detection device 16 set in the fire detection signal. A fire detection device 16 that determines the monitoring area, sets a pollution sign in the state storage area of the memory corresponding to the determined monitoring area, and subsequently monitors the state storage area for which the pollution sign is set in step S4. Whether or not the fire detection unit (translucent window 36) of the above is in a fouling sign state, that is, whether or not both of the corresponding fire detection units of the fire detection device 16 adjacent to the monitoring area are fouling sign or not is determined.

Here, the fouling sign signal is attached as fouling sign information or separately, according to the fire detection unit (right eye, left eye) in the fouling sign state. The same applies to the fouling signal.

When it is determined in step S4 that the fire detection unit (translucent window 36) of the fire detection device 16 in which the control unit 18 duplicately monitors the monitoring area is in a pollution sign state, the process proceeds to step S5, and the monitoring area of the monitoring area is determined. Notify the sign of a monitoring failure.

Subsequently, the process proceeds to step S6, and when the control unit 18 determines that the fire detection device 16 has received the pollution signal, the control unit 18 proceeds to step S7 to notify the monitoring failure of the corresponding monitoring area.

Further, the control unit 18 proceeds to step S6 even when the reception of the pollution sign signal is not determined in step S2, and determines whether or not the contamination signal is received.

[Modification of the present invention]
(Fire detection device)
The above embodiment takes a two-wavelength fire detection device as an example, but the present invention is not limited to this, and other methods may be used. For example, in addition to the above-mentioned two wavelengths, for example, radiation energy in a wavelength band near 3.8 μm is detected by the same method as other wavelengths, and the presence or absence of a flame is determined by the relative ratio of each received signal in these three wavelength bands. It may be a three-wavelength flame detector for determination.

(Omen of pollution and notification of pollution)
In the above embodiment, the disaster prevention receiver notifies the monitoring failure sign and the monitoring failure of the corresponding monitoring area based on the pollution sign signal and the pollution signal received from the fire detection device adjacent to the monitoring area. Not limited to. For example, in cooperation with the monitoring failure sign and the monitoring failure in the monitoring area, the pollution sign and the pollution of the fire detection device arranged adjacent to the monitoring area may be individually notified.

(Notification of failure status due to factors other than pollution)
In the above embodiment, the failure status (monitoring failure sign, monitoring failure) in the monitoring performance on the system is evaluated according to the status of the fouling of the translucent window such as normal (non-staining), fouling sign, and fouling. The disaster prevention system to be processed is taken as an example, but by treating the circuit failure of the fire detection device (no signal, no response, circuit failure, etc.) in the same way as the pollution, the failure status (monitoring failure) in the monitoring performance on the system is treated. It may be a disaster prevention system that evaluates and processes signs (predictions, monitoring failures).

(Other)
Further, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiver 12a, 12b: Transmission line 16: Fire detection device 16a, 16b: Fire detection unit 18, 32: Control unit 20a, 20b, 34: Transmission unit 36: Transparent Optical windows 38a, 38b: Light receiving unit 40a, 40b: Amplification processing unit 42: Test light source unit 44: Stain light receiving unit 45: Stain detection unit 46: Amplification unit 48: Fire judgment unit 50: Stain processing unit

Claims (4)

In a disaster prevention system in which multiple fire detection devices are connected to the receiving device
The fire detection device is
A light receiving part that receives radiation from the monitoring area through a translucent window and converts it into an electrical signal,
A fire determination unit that determines the presence or absence of a fire in the corresponding monitoring area based on an electric signal from the light receiving unit.
A fouling treatment unit that detects the fouling level of the translucent window corresponding to the light receiving unit and transmits a signal regarding the fouling status to the receiving device based on the fouling level.
With
The receiving device is
Based on the signal related to the fouling status, the fouling status of the plurality of fire detection devices arranged adjacent to each other and monitoring the same monitoring area in duplicate is the predetermined fouling state, or the fouling status is reached. Determine if it is a sign of pollution that is recognized as a sign,
When all of the fire detection devices that repeatedly monitor the same monitoring area are in the pollution sign state, it is determined as a monitoring failure sign of the corresponding monitoring area, and the monitoring failure sign of the monitoring area is detected. Notify and
When a part of the fire detection devices that monitor the same monitoring areas in duplicate is in the fouling sign state and the other is in the fouling state, it is determined as a monitoring failure sign of the corresponding monitoring area. , A disaster prevention system characterized by notifying a sign of a monitoring failure in the monitoring area.
In the disaster prevention system according to claim 1,
When all of the fire detection devices that monitor the same monitoring areas in duplicate are in the dirty state, the receiving device determines that there is a monitoring failure in the corresponding monitoring area and monitors the monitoring area. A disaster prevention system characterized by notifying a failure.
In a disaster prevention system in which multiple fire detection devices are connected to the receiving device
The fire detection device is
A light receiving part that receives radiation from the monitoring area through a translucent window and converts it into an electrical signal,
A fire determination unit that determines the presence or absence of a fire in the corresponding monitoring area based on an electric signal from the light receiving unit.
A fouling treatment unit that detects the fouling level of the translucent window corresponding to the light receiving unit and transmits a signal regarding the fouling status to the receiving device based on the fouling level.
With
The receiving device is
Based on the signal related to the fouling status, the fouling status of the plurality of fire detection devices arranged adjacent to each other and monitoring the same monitoring area in duplicate is the predetermined fouling state, or the fouling status is reached. Determine if it is a sign of pollution that is recognized as a sign,
When all of the fire detection devices that repeatedly monitor the same monitoring area are in the pollution sign state, it is determined as a monitoring failure sign of the corresponding monitoring area, and the monitoring failure sign of the monitoring area is detected. Notify and
When at least a part of the fire detection devices that monitor the same monitoring areas in duplicate becomes in the dirty state, it is determined that there is a monitoring failure in the corresponding monitoring area, and the monitoring failure in the monitoring area. A disaster prevention system characterized by notifying.
In a disaster prevention system in which multiple fire detection devices are connected to the receiving device
The fire detection device is
A light receiving part that receives radiation from the monitoring area through a translucent window and converts it into an electrical signal,
A fire determination unit that determines the presence or absence of a fire in the corresponding monitoring area based on an electric signal from the light receiving unit.
A fouling treatment unit that detects the fouling level of the translucent window corresponding to the light receiving unit and transmits a signal regarding the fouling status to the receiving device based on the fouling level.
With
The receiving device is
Based on the signal related to the fouling status, the fouling status of the plurality of fire detection devices arranged adjacent to each other and monitoring the same monitoring area in duplicate is the predetermined fouling state, or the fouling status is reached. Determine if it is a sign of pollution that is recognized as a sign,
When all of the fire detection devices that monitor the same monitoring area in duplicate are in the pollution sign state, it is determined as a monitoring failure sign of the corresponding monitoring area, and the monitoring failure sign of the monitoring area is detected. When at least a part of the fire detection devices that notify each other and subsequently monitor the same monitoring area in duplicate becomes in the dirty state, it is determined that the monitoring failure of the corresponding monitoring area occurs. A disaster prevention system characterized by notifying a monitoring failure of the monitoring area.

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