Disaster prevention system, disaster prevention reception panel and disaster prevention method

Abstract

To grasp a contamination state of a translucent window provided correspondingly to monitoring areas on both right and left sides to appropriately determine necessity of cleaning.SOLUTION: A disaster prevention system monitors fire breakouts in monitoring areas by installing fire detectors for every boundary of a plurality of continuous monitoring areas and comprises: a display unit which displays information regarding the fire detectors; and a control unit which displays the information on the display unit. Each fire detector detects a first window contamination degree showing a contamination state of a first translucent window, and a second window contamination degree showing a contamination degree of a second translucent window, the control unit associates the first window contamination degree of one fire sensor with the second window contamination degree of the other fire sensor installed on the adjacent boundaries to be displayed in the display unit on the basis of the first window contamination degree and the second window contamination degree, and determines whether or not necessity of cleaning of the first translucent window and the second translucent window is urgent.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a disaster prevention system for monitoring a fire in a monitoring area divided at predetermined intervals in the longitudinal direction of a tunnel by a fire detection device connected to a signal line drawn out from a disaster prevention receiver, a disaster prevention receiver of the disaster prevention system, and a disaster prevention method.

Background Art

[0002] Conventionally, in a tunnel such as an expressway for automobiles, a fire detection device for monitoring a fire has been installed to protect people, vehicles, etc. from a fire accident occurring in the tunnel, and it is connected to a signal line drawn out from a disaster prevention receiver.

[0003] The fire detection device is installed at the boundary of a monitoring area divided at intervals of, for example, 25 m or 50 m along the longitudinal direction of the tunnel. The fire detection device has a monitoring area in both the left and right directions, and adjacent fire detection devices duplicate the monitoring of a fire in the same monitoring area.

[0004] The fire detection device is provided with light-transmitting windows on the left and right corresponding to the left and right monitoring areas, and monitors radiation from a fire flame occurring in the tunnel, for example, infrared rays, through the light-transmitting windows.

[0005] Since the dirt on the light-transmitting window of the fire detection device installed in the tunnel increases with the passage of time due to the adhesion of dirt substances floating in the environment, etc., in order to maintain the fire monitoring function, the dirt on the light-transmitting window is monitored, and the light-transmitting window is cleaned at regular intervals.

[0006] The dirt monitoring of the light-transmitting window periodically emits test light from a test light source provided in the fire detection device, which enters the light-transmitting window through the space on the monitoring area side outside the detection device and is received by a light-receiving element. The light-receiving level at this time is compared with that at the time of initial non-fouling, etc., and the light attenuation rate is obtained as the fouling degree. When the fouling degree exceeds a predetermined threshold value, a fouling signal is transmitted to the disaster prevention receiving panel to output a fouling alarm. When a fouling alarm of the fire detection device is output, it is necessary to clean the light-transmitting window of the fire detection device in a fouled state.

[0007] In addition, a fouling prediction threshold value lower than the fouling threshold value is set, and when the fouling degree exceeds the fouling prediction threshold value, a fouling prediction signal is transmitted to the disaster prevention receiving panel to output a fouling prediction alarm. Regarding the fouling prediction alarm of the fire detection device, when the number of fire detection devices in a fouling prediction state increases and the period until the scheduled regular cleaning is long, it is possible to take measures such as reviewing the plan to advance the timing of the cleaning work.

[0008] By the way, as a method for the disaster prevention receiving panel to monitor the fouling of the fire detection device, based on the fouling degree detected by the fire detection device, the progress of the fouling state such as normal, fouling prediction, and fouling is displayed in order in the tunnel length direction. Thereby, it is possible to grasp the fouling degree and the tendency of fouling of the fire detection devices throughout the tunnel (Patent Document 1).

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0010] By the way, in a disaster prevention system that displays the degree of progress of the fouling state, such as normal, fouling sign, and fouling, in order along the tunnel length direction based on the degree of fouling detected by a fire detection device by a disaster prevention receiver panel, the fire detection device does not distinguish between the fouling states of the left and right light-transmitting windows provided corresponding to the left and right monitoring areas. If the degree of fouling of both light-transmitting windows has not reached the fouling sign threshold value, it is normal. If the fouling degree of either one of the light-transmitting windows exceeds the fouling sign threshold value, it is judged as a fouling sign. Further, if the fouling degree of either one of the light-transmitting windows exceeds the fouling threshold value, it is judged as fouling, and the degree of progress of the fouling state is displayed in order along the tunnel length direction.

[0011] The display of the fouling state of the fire detection device by such a disaster prevention receiver panel is for checking the necessity of cleaning the light-transmitting window provided in the fire detection device. However, when considering the necessity of cleaning the light-transmitting window of the fire detection device and planning the cleaning work, there is a non-efficient aspect in simply displaying the degree of progress of the fouling state in order (arrangement order) along the tunnel length direction. In addition, in the conventional disaster prevention system, since the fouling state is displayed without distinguishing between the left and right light-transmitting windows, there is a possibility that the necessity of cleaning cannot be accurately judged.

[0012] For example, even if the degree of fouling is displayed in order in the longitudinal direction of the tunnel, it is necessary to visually search for which detection device needs cleaning or which has a high urgency for cleaning.

[0013] Also, for example, the fouling state of the fire detection device installed in the tunnel may cause the fouling of one of the left and right light-transmitting windows to progress faster than the other depending on the direction of the airflow flowing in the tunnel. Therefore, for example, even if one of the light-transmitting windows of a certain fire detection device is in a fouling sign state, the other light-transmitting window may be normal (non-fouled or slightly fouled). In such a case, the disaster prevention receiver panel displays the light-transmitting window of the fire detection device as being in a fouling sign state. In this case, the urgency is not higher than when both light-transmitting windows are in a fouling sign state, but this cannot be immediately grasped and is not efficient.

[0014] Also, in adjacent fire detection devices that duplicate the monitoring of the same monitoring area, even if the light-transmitting window of one fire detection device monitoring the same monitoring area is in a damaged state, if the light-transmitting window of the other fire detection device monitoring the same monitoring area is in a normal state, the monitoring function in that monitoring area is maintained by monitoring through the light-transmitting window of the fire detection device in a normal state. Knowing this means that there is relatively more time available for cleaning the fire detection device that has become damaged. However, even in this case, in the conventional display that does not consider the damage of the left and right light-transmitting windows, it is necessary to rush the cleaning of the damaged fire detection device more than necessary, leaving the possibility that the necessity for cleaning cannot be appropriately judged.

[0015] An object of the present invention is to provide a disaster prevention system capable of grasping the damaged state of light-transmitting windows provided corresponding to monitoring areas on both left and right sides of a fire detection device and appropriately judging the necessity for cleaning, a disaster prevention receiving board of the disaster prevention system, and a disaster prevention method.

Means for Solving the Problems

[0016] (A disaster prevention system capable of judging whether the necessity for cleaning the light-transmitting window is urgent) The present invention is a disaster prevention system that arranges fire detection devices at the boundaries of a plurality of continuous monitoring areas to monitor the occurrence of fires in the monitoring areas, a display unit that displays information regarding the fire detection device, a control unit that causes the display unit to display information, and includes, the fire detection device is provided with a first light-transmitting window and a second light-transmitting window corresponding to each of the mutually adjacent monitoring areas adjacent to the boundary of the monitoring area where the fire detection device is arranged, by receiving light rays from each of the mutually adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window, it determines the presence or absence of a fire occurrence in each of the monitoring areas, detects a first window damage degree indicating the damaged state of the first light-transmitting window corresponding to one of the mutually adjacent monitoring areas and a second window damage degree indicating the damaged state of the second light-transmitting window corresponding to the other of the mutually adjacent monitoring areas, The control unit Based on the first window fouling degree and the second window fouling degree detected by a plurality of fire detection devices, the display unit is caused to display, for one fire detection device and the other fire detection device that are respectively arranged at adjacent boundaries and redundantly monitor the same monitoring area, the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device in association with each other. It is characterized in that, by the display in which the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device corresponding to the same monitoring area are associated with each other, it is possible to determine whether or not there is an urgent need to clean the first light-transmissive window and the second light-transmissive window.

[0017] Also, as the display in which the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device corresponding to the same monitoring area are associated with each other, the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device corresponding to the same monitoring area are arranged side by side so as to be adjacent to each other, and the pairs of the first window fouling degree and the second window fouling degree arranged adjacent to each other are arranged and displayed in accordance with the arrangement order of a plurality of fire detection devices.

[0018] Also, as the display in which the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device corresponding to the same monitoring area are associated with each other, the first window fouling degree of one fire detection device and the second window fouling degree of the other fire detection device corresponding to the same monitoring area are arranged side by side so as to be adjacent to each other, and the pairs of the first window fouling degree and the second window fouling degree arranged adjacent to each other are arranged and displayed in accordance with the arrangement order of a plurality of continuous monitoring areas together with the area information indicating the corresponding monitoring areas.

[0019] (A disaster prevention system capable of discriminatively displaying a normal state, a fouling warning state, and a fouled state) In another aspect of the present invention, there is provided a disaster prevention system that arranges fire detection devices at the boundaries of a plurality of continuous monitoring areas to monitor the occurrence of fire in the monitoring areas, a display unit that displays information regarding the fire detection devices, a control unit that causes the display unit to display information, and includes The fire detection device A first light-transmissive window and a second light-transmissive window corresponding to each of the monitoring areas adjacent to each other and in contact with the boundary of the monitoring area where the fire detection device is arranged are provided. By receiving light rays from each of the adjacent monitoring areas through the first light-transmissive window and the second light-transmissive window, the presence or absence of a fire occurrence in each of the monitoring areas is determined. A first window fouling degree indicating the fouling state of the first light-transmissive window corresponding to one of the adjacent monitoring areas and a second window fouling degree indicating the fouling state of the second light-transmissive window corresponding to the other of the adjacent monitoring areas are detected. The control unit causes the display unit to display the first window fouling degree and the second window fouling degree detected by a plurality of fire detection devices in a predetermined order. As the first window fouling degree and the second window fouling degree, a normal state in which the fouling degree has not reached a predetermined fouling prediction threshold value, a fouling prediction state in which the fouling degree has reached the fouling prediction threshold value, and a fouling state in which the fouling degree has reached a predetermined fouling threshold value higher than the fouling prediction threshold value are displayed in an identifiable manner.

[0020] Further, the control unit associates the first window fouling degree, the second window fouling degree, and the identification information set for each fire detection device in the same fire detection device with each other, and arranges and displays the set of the associated first window fouling degree, second window fouling degree, and identification information in the arrangement order of the plurality of fire detection devices on the display unit. Among the fouling degree displayed by either one of the first window fouling degree or the second window fouling degree and the fouling degree displayed by either the other of the first window fouling degree or the second window fouling degree, the state with the higher fouling degree is preferentially displayed in the identification information.

[0021] Further, the present invention extends not only to the disaster prevention system but also to the disaster prevention receiving board and the disaster prevention method of the disaster prevention system having the features of the above-described disaster prevention system.

Effects of the Invention

[0022] In a disaster prevention system in which a plurality of fire detection devices arranged at the boundaries of monitoring areas divided at predetermined intervals along a predetermined direction are connected to a signal line drawn out from a receiving device, each fire detection device receives radiation from two monitoring areas through light-transmitting windows corresponding to each of them, converts it into an electrical signal, and when a fire in the corresponding monitoring area is determined based on the electrical signal, transmits a fire determination signal to the receiving device. The fire detection device includes a fire determination unit and a contamination detection unit. The contamination detection unit detects a first window contamination degree indicating the contamination state of one light-transmitting window and a second window contamination degree indicating the contamination state of the other light-transmitting window, and transmits a contamination detection signal corresponding thereto to the receiving device. The receiving device includes a fire monitoring control unit that receives a fire determination signal from the fire detection device and issues an alarm, and a contamination display control unit that displays the first window contamination degree and the second window contamination degree received from the plurality of fire detection devices in a predetermined order. Therefore, for example, in a plurality of fire detection devices installed at the boundaries of monitoring areas divided at predetermined intervals along the longitudinal direction of a tunnel and monitoring fires in the monitoring areas corresponding to the first and second light-transmitting windows, the first window contamination degree and the second window contamination degree provided in the plurality of fire detection devices are displayed in a predetermined order by the receiving device, so that, for example, the degree of contamination such as normal, contamination warning, and contamination can be grasped for each of the first and second light-transmitting windows, and the necessity of cleaning the light-transmitting windows can be appropriately determined.

[0023] (Effect of displaying in descending order of the degree of contamination separately for the left window and the right window) Further, since the contamination display control unit of the receiving device displays the first window contamination degree and the second window contamination degree of the plurality of fire detection devices in descending order of the degree of contamination separately, the degree of contamination of the fire detection device is displayed in descending order of the degree of contamination separately for the first and second light-transmitting windows, and the degree of contamination of the light-transmitting window with a high necessity of cleaning is displayed at the top, for example. Thus, the necessity of cleaning can be appropriately determined.

[0024] (Effect of displaying a combined contamination degree of the left window and the right window) In addition, the dirt display control unit combines and displays the second window dirt level corresponding to the first window dirt level displayed in descending order of dirt level, and also combines and displays the first window dirt level corresponding to the second window dirt level displayed in descending order of dirt level. Therefore, the second window dirt level of the same fire detection device is displayed corresponding to the first window dirt level displayed at the top in descending order of dirt level, enabling an appropriate determination of the necessity for cleaning considering the first and second dirt levels.

[0025] (Effect of displaying dirt level in the order of the arrangement of fire detection devices) In addition, since the dirt display control unit of the receiving device displays the combinations of the first window dirt levels and the second window dirt levels of a plurality of fire detection devices in the order of the arrangement of the plurality of fire detection devices, the combinations of the first window dirt level and the right window dirt level are displayed along the arrangement direction of the fire detection devices in the tunnel, enabling an appropriate determination of the necessity for cleaning considering the first and second dirt levels corresponding to the arrangement positions in the tunnel.

[0026] (Effect of displaying the dirt levels of the left and right windows in descending order with mixing) In addition, since the dirt display control unit of the receiving device displays the first window dirt level and the second window dirt level of a plurality of fire detection devices in a mixed manner in descending order of dirt level, the first window dirt level and the second window dirt level are arranged and displayed in descending order of dirt level, enabling the grasping of the light-transmitting window with the highest necessity for cleaning and an appropriate determination of the necessity for cleaning.

[0027] (Effect of displaying the dirt levels of the overlapping monitored areas in order) In addition, the dirt display control unit of the receiving device arranges the pairs of the first window dirt level and the second window dirt level of a plurality of fire detection devices in the order of the arrangement order of the plurality of fire detection devices so that the dirt levels of any one of the fire detection devices that duplicate the monitoring of the same monitoring area and the dirt level of the other fire detection device are adjacent to each other. Therefore, the relationship between one dirt level and the other dirt level corresponding to each light-transmitting window for the same monitoring area that is redundantly monitored by two adjacent fire detection devices can be easily and surely understood. For example, even if one dirt level has reached the dirt level, if the other dirt level is within the normal level, the monitoring area cannot be redundantly monitored, but it is normally monitored by the other fire detection device with a normal dirt level. Even if the dirt level of one fire detection device reaches the dirt level, it is possible to determine that the situation where the necessity of cleaning is urgent does not occur, and it is possible to appropriately determine the necessity of cleaning.

[0028] (Effect of dirt prediction, dirt discrimination by fire detection device, and identification display by receiving device) In addition, when the first window dirt level or the second window dirt level of the dirt detection unit of the fire detection device reaches a predetermined dirt prediction threshold value, a dirt prediction signal indicating a dirt prediction state is transmitted to the receiving device. When the first window dirt level or the second window dirt level reaches a predetermined dirt threshold value higher than the dirt prediction threshold value, a dirt signal is transmitted to the receiving device. The dirt display control unit of the receiving device causes the left window dirt level or the right window dirt level corresponding to the dirt prediction signal to be identified and displayed in a dirt prediction state, and causes the first window dirt level or the second window dirt level corresponding to the dirt signal to be identified and displayed in a dirt state. Therefore, for example, when the dirt levels are displayed in descending order separately for the first window dirt level and the second window dirt level, it can be easily grasped by each identification display whether the large dirt level displayed at the top is in a dirt state or a dirt prediction state. It is possible to more appropriately determine the necessity of cleaning when the dirt levels are displayed in descending order.

[0029] (Effect of dirt prediction, dirt determination, and identification display by receiving device) In addition, when the first window fouling degree or the second window fouling degree reaches a predetermined fouling omen threshold value, the fouling display control unit of the receiving device causes the first window fouling degree or the second window fouling degree to be discriminatively displayed in a fouling omen state, and when the first window fouling degree or the second window fouling degree reaches a predetermined fouling threshold value higher than the fouling omen threshold value, the first window fouling degree or the second window fouling degree is discriminatively displayed in a fouling state. Therefore, it is possible to easily grasp whether the display of a large fouling degree is in a fouling state or a fouling omen state by each discriminative display, and it is possible to more appropriately determine the necessity of cleaning when displaying in descending order of fouling degree.

[0030] In addition, by centrally performing the determination of the fouling omen state and the fouling state in the receiving device, it is possible to reduce the processing load on the fire detection device side.

Brief Description of the Drawings

[0031]

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Modes for Carrying Out the Invention

[0032] [Overview of Disaster Prevention System] FIG. 1 is an explanatory drawing showing an overview of a disaster prevention system according to the present invention, taking the fire monitoring of a tunnel as an example. As shown in FIG. 1, as a tunnel for an expressway, an uphill tunnel 1a and a downhill tunnel 1b are constructed.

[0033] Inside the uphill tunnel 1a and the downhill tunnel 1b, fire detection devices 16 are installed at intervals of, for example, 50 meters along the wall surface in the longitudinal direction of the tunnel. The fire detection device 16 has two sets of light receiving parts with light transmissive windows on the left and right, so it has monitoring areas in both the left and right directions on the uphill side and the downhill side in the longitudinal direction of the tunnel, and is continuously arranged along the longitudinal direction of the tunnel so that the monitoring areas overlap with those of adjacent fire detection devices arranged adjacent to each other.

[0034] From the disaster prevention receiving panel 10 that functions as a receiving device, power supplies and signal lines 12a and 12b are drawn out to the uphill tunnel 1a and the downhill tunnel 1b, and the fire detection devices 16 are connected. Unique addresses are preset in order in the fire detection devices 16. Note that instead of addresses, unique IDs (identifiers) may be set in order in the fire detection devices 16.

[0035] FIG. 2 is an explanatory drawing showing the monitoring areas in the tunnel that are redundantly monitored by the fire detection devices, taking the uphill tunnel 1a in FIG. 1 as an example.

[0036] As shown in FIG. 2, fire detection devices 16 are installed at intervals of, for example, 50 meters along the tunnel side wall of the uphill tunnel 1a. This divides the inside of the tunnel into monitoring areas AR1, AR2, … ARi-1, ARi, ARi+1, ··· at intervals of 50 meters in the longitudinal direction, and fire detection devices 16 are installed at the boundaries. Each monitoring area has a size of, for example, 50 m in the longitudinal direction × 20 m in the short direction.

[0037] The fire detection device 16 is provided with a left window light receiving portion having a left translucent window (first window) for individually monitoring the left and right monitoring areas and a right window light receiving portion having a right translucent window (second window). Here, the left-right relationship of the fire detection device 16 is defined in the state where the fire detection device 16 is viewed from the front in the present embodiment.

[0038] For example, the i-th fire detection device 16 arranged at the left end of the monitoring area ARi and the (i + 1)-th fire detection device 16 arranged at the right end monitor the monitoring area ARi by the right window light receiving portion of the i-th fire detection device 16. At the same time, the same monitoring area ARi is redundantly monitored by the left window light receiving portion of the (i + 1)-th fire detection device 16.

[0039] Note that the first monitoring area AR1 on the tunnel entrance side is monitored solely by the left window light receiving portion of the first fire detection device 16.

[0040] The fire detection device 16 monitors a fire by observing radiation, such as infrared rays, from a flame caused by a fire in the left or right monitoring area with the left window light receiving portion and also monitors the fire with the right window light receiving portion. When a fire is detected, a fire signal including a preset unique address and identification information indicating whether it is left window detection or right window detection is transmitted to the disaster prevention receiving board 10.

[0041] In addition, the fire detection device 16 independently detects the fouling of the translucent window provided in the light receiving portion on the left and right, for example, once a day, and transmits a fouling detection signal including the detected fouling degree and identification information indicating whether it is left window detection or right window detection to the disaster prevention receiving board 10.

[0042] Furthermore, when the periodically detected fouling degree exceeds a predetermined fouling prediction threshold value, the fire detection device 16 transmits a fouling prediction signal including fouling prediction information and identification information indicating whether it is left window detection or right window detection to the disaster prevention receiving board 10. When the fouling degree exceeds a predetermined fouling threshold value, a fouling signal including fouling information and identification information indicating whether it is left window detection or right window detection is transmitted to the disaster prevention receiving board 10.

[0043] [Fire Detection Device] FIG. 3 is a block diagram showing an outline of the functional configuration of the fire detection device, and FIG. 4 is an explanatory diagram showing the external appearance of the fire detection device.

[0044] As shown in FIG. 3, the fire detection device 16 includes a left window fire detection unit 16L and a right window fire detection unit 16R. As represented by the left window fire detection unit 16L, it includes light receiving units 38a and 38b including light receiving sensors, amplification processing units 40a and 40b corresponding to each of them, a control unit 34, and a transmission unit 35. In front of the light receiving units 38a and 38b, a left translucent window 36L provided on the detector cover is arranged, and light energy from the external monitoring area is incident on the light receiving units 38a and 38b through the left translucent window 36L.

[0045] In addition, in order to monitor the fouling of the left translucent window 36L, a fouling detection unit composed of a test light source unit 42, a fouling light receiving unit 44, and an amplification unit 46 is provided.

[0046] Here, as shown in FIG. 4, in the fire detection device 16, a left translucent window 36L and a right translucent window 36R are provided in a sensor housing portion 54 provided at the upper part of the housing 52, and inside each of the left translucent window 36L and the right translucent window 36R, the light receiving units and the like of the left window fire detection unit 16L and the right window fire detection unit 16R shown in FIG. 3 are arranged. Also, two sets of test light source translucent windows 56 that house individual test light source units 42 are provided at positions near the left translucent window 36L and the right translucent window 36R where the light receiving units can be seen through.

[0047] Referring to FIG. 3 again, the right window fire detection unit 16R has the same configuration as the left window fire detection unit 16L, but the control unit 34 is provided as a unit common to both. For example, a computer circuit including a CPU, a memory, various input / output ports, etc. as hardware is used. Also, a fire determination unit 48 and a fouling processing unit 50 are provided in the control unit 34 as functions realized by the execution of a program.

[0048] The left window fire detection unit 16L monitors for fires, for example, based on the two-wavelength flame detection principle. The light receiving unit 38a selectively transmits, through an optical wavelength bandpass filter, radiation in the 4.4 - 4.5 μm resonance emission band of CO2, which is characteristic of flames, from the light energy incident through the left translucent window 36L. After photoelectrically converting the energy of this radiation with a light receiving sensor, it is subjected to predetermined processing such as amplification by the amplification processing unit 40a to form a light reception signal corresponding to the energy amount and output it to the control unit 34.

[0049] The light receiving unit 38b selectively transmits, through an optical wavelength bandpass filter, radiation energy in the 5 - 6 μm range from the light energy incident through the left translucent window 36L. After detecting and photoelectrically converting the energy of this radiation with a light receiving sensor, it is subjected to predetermined processing such as amplification by the amplification processing unit 40b to form a light reception signal corresponding to the energy amount and output it to the control unit 34.

[0050] The fire determination unit 48 provided in the control unit 34 determines the presence or absence of a flame, for example, by taking the relative ratio of the light reception signal levels output from the amplification processing units 40a and 40b and comparing it with a predetermined threshold. When a fire is detected by determining the presence of a flame, it instructs the transmission unit 35 to set fire determination information and identification information indicating left window detection in the response telegram for the call telegram that matches the self-address from the disaster prevention receiving panel 10, and performs control to transmit it as a fire determination signal to the disaster prevention receiving panel 10.

[0051] The contamination detection unit composed of the test light source unit 42, the contaminated light receiving unit 44, and the amplification unit 46 causes the test light source unit 42 to blink at a predetermined period, for example, once a day, to emit a predetermined test light according to an instruction from the contamination processing unit 50 of the control unit 34. The test light is incident on the contaminated light receiving unit 44 through the left translucent window 36L. This test light is converted into an electrical signal by a light receiving sensor provided in the contaminated light receiving unit 44, amplified by the amplification unit 46, and a contamination detection signal corresponding to the contamination degree of the left translucent window 36L is output to the control unit 34.

[0052] When the contamination processing unit 50 of the control unit 34 obtains a contamination detection signal from the amplification unit 46, it calculates the current rate by comparing the pre-recorded contamination detection signal level when there is no contamination with the contamination detection signal level obtained by the contamination processing, and thereby detects the degree of contamination. The detected degree of contamination is instructed to the control unit 34, and by setting contamination information indicating the value of the degree of contamination and identification information indicating left window detection in the response telegram for the call telegram that matches the self-address, control is performed to transmit it to the disaster prevention receiving board 10 as a contamination detection signal.

[0053] The above-mentioned contamination detection by the contamination processing unit 50 is carried out in response to a periodic (for example, once a day) contamination processing execution instruction signal from the disaster prevention receiving board 10, and the contamination detection signal can also be returned as this response signal.

[0054] Also, when the detected degree of contamination exceeds a predetermined contamination warning threshold value, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35, and by setting contamination warning information and identification information indicating left window detection in the response telegram for the call telegram (or the previous contamination processing execution instruction signal) that matches the self-address, control is performed to transmit it to the disaster prevention receiving board 10 as a contamination warning signal.

[0055] Here, when attaching the degree of contamination to the contamination information transmitted to the disaster prevention receiving board 10, the comparison process with the contamination warning threshold value and the determination of the contamination warning may be performed on the side of the disaster prevention receiving board 10. In this case, the contamination warning threshold value is set and registered in the disaster prevention receiving board 10.

[0056] Also, when the degree of contamination based on the contamination detection signal from the amplification unit 46 exceeds a predetermined contamination threshold value that is higher than the contamination warning threshold value, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35, and by setting contamination information and identification information indicating left window detection in the call telegram from the disaster prevention receiving board 10 that matches the self-address, control is performed to transmit it to the disaster prevention receiving board 10 as a contamination signal.

[0057] In addition, when attaching a degree of contamination to the contamination information transmitted to the disaster prevention receiver 10, the comparison process with the contamination threshold value and the determination of contamination may be performed on the side of the disaster prevention receiver 10. In this case, the contamination threshold value is set and registered in the disaster prevention receiver 10.

[0058] Here, the contamination processing unit 50 of the control unit 34 obtains the light attenuation rate of the left translucent window 36L indicating the degree of contamination based on the contamination detection signal from the amplification unit 46, transmits this light attenuation rate as the degree of contamination to the disaster prevention receiver 10, and performs the determination process of contamination omen and contamination.

[0059] The calculation of the light attenuation rate of the left translucent window 36L by the contamination processing unit 50 stores the level of the contamination detection signal at the time of factory shipment, the start of fire monitoring, or the end of cleaning when there is no contamination on the left translucent window 36L as the reference level Er, and every time a contamination detection signal with a detection level E is obtained from the amplification unit 46, the light attenuation rate D is D = 1 - (E / Er) calculated as.

[0060] The light attenuation rate D calculated in this way is a value that varies in proportion to the degree of contamination of the translucent window 36. In the following description, the light attenuation rate will be described as the degree of contamination.

[0061] In addition, the contamination omen threshold value used by the contamination processing unit 50 for the determination of contamination omen is set to a predetermined first contamination level at which the left translucent window 36L is slightly contaminated but the entire fire monitoring area by the light receiving units 38a and 38b can be maintained (a fire of a predetermined scale can be detected), for example, a light attenuation rate of 75 percent.

[0062] Furthermore, the contamination threshold value used by the contamination processing unit 50 for the determination of contamination is set to a predetermined second contamination level higher than the first contamination level at which the entire monitoring of the monitoring area by the light receiving unit becomes impossible, for example, a light attenuation rate of 85 percent.

[0063] The processing of such a contamination detection unit 50 is the same for the contamination of the right translucent window 36R.

[0064] [Disaster Prevention Receiver] FIG. 5 is a block diagram showing the schematic functional configuration of the disaster prevention receiving panel. As shown in FIG. 5, the disaster prevention receiving panel 10 includes a control unit 18. The control unit 18 is a function realized by, for example, executing a program, and is provided with the functions of a fire monitoring control unit 31 and a stain display control unit 32. As the hardware of the control unit 18, a computer circuit or the like including a CPU, a memory, various input / output ports, etc. is used.

[0065] Transmission units 20a and 20b are provided for the control unit 18, and a plurality of fire detection devices 16 installed in the up-line tunnel 1a and the down-line tunnel 1b are respectively connected to the signal lines 12a and 12b drawn from the transmission units 20a and 20b.

[0066] In addition, an alarm unit 22 equipped with a speaker, an alarm display lamp, etc., a display unit 24 equipped with a liquid crystal display, etc., a printer 25, an operation unit 26 equipped with various switches, etc., and a modem 28 for connecting an IG slave station device for communicating with external monitoring facilities are provided for the control unit 18. Furthermore, an IO unit 30 connected to ventilation facilities, alarm display board facilities, radio rebroadcast facilities, camera monitoring facilities, lighting facilities, and fire extinguishing pump facilities is provided.

[0067] The fire monitoring control unit 31 of the disaster prevention receiving panel 10 repeatedly transmits a call message including a polling command that sequentially designates the addresses of the fire detection devices 16 via the transmission units 20a and 20b. When the fire detection device 16 receives a call message that matches its own address, it returns a response message including detection information such as the stain degree, stain omen, and stain detected immediately before, and identification information indicating whether it is a left window detection or a right window detection.

[0068] Note that when the fire monitoring control unit 31 of the disaster prevention receiving panel 10 determines a fire based on the reception of a message from the fire detection device 16, it instructs the alarm unit 22 to output a fire alarm and instructs the IO unit 30 to perform interlocking control with other facilities.

[0069] [Stain Monitoring by Disaster Prevention Receiving Panel] [Collection and Storage of Stain Information] The contamination display control unit 32 of the disaster prevention receiver 10 stores the contamination information 100 of the fire detection device 16 shown in FIG. 6 in the memory of the control unit 18 based on the contamination degree information set in the response telegram received from the fire detection device 16 and the identification information indicating whether it is left window detection or right window detection.

[0070] The contamination information 100 stored in the memory of FIG. 6 stores the left window contamination degree LDi detected by the left window fire detection unit 16L in FIG. 3 and the left window contamination degree RDi detected by the right window fire detection unit 16R corresponding to the address of the fire detection device 16. Here, i indicates an arbitrary address of the fire detection device 16.

[0071] Here, assuming that the tunnel lengths of the uphill tunnel 1a and the downhill tunnel 1b shown in FIG. 1 are each 1 kilometer, 20 fire detection devices 16 are arranged at intervals of 50 meters. In the contamination information 100 of FIG. 6, the case where the left window contamination degrees LD01 to LD20 and the right window contamination degrees RD01 to RD20 corresponding to the addresses 01 to 20 set for the 20 fire detection devices 16 are stored is taken as an example. Also, the left window contamination degrees LD01 to LD20 and the right window contamination degrees RD01 to RD20 are analog values indicating the light attenuation rate of the light-transmitting window.

[0072] When a predetermined operation for checking the contamination state is performed by the operation unit 26, the contamination display control unit 32 displays a list of the left window contamination degree and the right window contamination degree corresponding to the address on the liquid crystal display of the display unit 24 in a predetermined order based on the contamination information 100 in FIG. 6, and also performs control to cause the printer 25 to print and output.

[0073] Also, when the contamination display control unit 32 of the disaster prevention receiver 10 displays a list of the left window contamination degree and the right window contamination degree corresponding to the address on the liquid crystal display of the display unit 24 or causes the printer 25 to print and output based on the contamination information 100 in FIG. 6, it performs control to distinguish and display the left window contamination degree and the right window contamination degree by color coding or the like corresponding to the contamination omen and contamination.

[0074] The embodiment of the display control of the contamination information by such a contamination display control unit 32 is as follows.

[0075] (First Embodiment of Defect Display) FIG. 7 is an explanatory diagram showing a first embodiment of the defect display. As shown in FIG. 7, the defect display 102 of this embodiment by the defect display control unit 32 of the disaster prevention receiving board 10 is displayed separately as left window defect information 102 and right window defect information 104 based on the defect information 100 shown in FIG. 6. The display is performed for each ascending and descending line, but only the ascending line side is illustrated.

[0076] The left window defect information 102 arranges the left window defect degrees LDi corresponding to the addresses Ai of the ascending line side fire detection devices 16 in descending order of the defect degree. Also, the right window defect information 104 arranges the right window defect degrees RDi corresponding to the addresses Ai of the fire detection devices 16 in descending order of the defect degree.

[0077] Also, regarding the left window defect information 102, since the left window defect degree LD15 of the top address 15 with the maximum defect degree has received a defect signal from the corresponding fire detection device 16, it is discriminatively displayed as being in a defective state as shown by diagonal lines. Also, the left window defect degrees LD09, LD04, LD12 of the addresses 09, 04, 12 from the second to the fourth in terms of defect degree have received a defect warning signal from the corresponding fire detection device 16, so they are discriminatively displayed as being in a defect warning state as shown by sandy areas.

[0078] Also, regarding the right window defect information 104, since the right window defect degree RD07 of the top address 07 with the maximum defect degree has received a defect signal from the corresponding fire detection device 16, it is discriminatively displayed as being in a defective state as shown by diagonal lines. Also, the left window defect degrees RD01, RD09 of the addresses 01, 09 from the second to the third in terms of defect degree have received a defect warning signal from the corresponding fire detection device 16, so they are discriminatively displayed as being in a defect warning state as shown by sandy areas.

[0079] The discriminative display of being in a defective state or a defect warning state is to make the background or characters of the corresponding display part a predetermined color. For example, the defective state is identified in red, and the defect warning is identified in yellow.

[0080] By looking at the displays of the left window fouling information 102 and the right window fouling information 104 arranged in descending order of the fouling degree in this way, it can be immediately grasped that for the left translucent window, the necessity of cleaning for the fire detection device 16 at address 15 is increasing, and for the right translucent window, the necessity of cleaning for the fire detection device 16 at address 07 is increasing. In particular, for both of them, since the fouling state indicated by the diagonal lines, that is, the light reduction rate has reached 85 percent and the entire monitoring of the warning area cannot be performed, it can be judged that the necessity of cleaning is even higher.

[0081] On the other hand, for the left translucent window, the fire detection devices 16 at addresses 09, 04, and 12, and for the right translucent window, the fire detection devices 16 at addresses 01 and 15 are in a fouling warning state indicated by sandy areas, that is, the light reduction rate is less than 85 percent but has reached 75 percent, and it can be judged that the necessity of cleaning is the next highest.

[0082] (Second Embodiment of Fouling Display) FIG. 8 is an explanatory diagram showing the second embodiment of the fouling display. As shown in FIG. 8, the fouling display of this embodiment by the fouling display control unit 32 of the disaster prevention receiving board 10 combines and displays the right window fouling degree RDi in the same fire detection device 16 with respect to the left window fouling degree LDi of the left window fouling display 102 shown in FIG. 7. The display is performed for each upward line and downward line, but only the upward line side is illustrated.

[0083] Also, the right window fouling degree RDi in the same fire detection device 16 is combined and corresponded to the left window fouling degree LDi of the left window fouling display 102 shown in FIG. 7 for display.

[0084] For example, the left window fouling degree LD15 at address 15 with the highest fouling degree of the left window fouling display 102 is combined and displayed with the right window fouling degree RD15 at the same address 15. Here, since the left window fouling degree LD15 at address 15 is in a fouling state, an identification display indicated by diagonal lines is performed, and since the right window fouling degree RD15 at the same address 15 is in a fouling warning state, an identification display indicated by sandy areas is performed.

[0085] In this case, the left window fouling degree LD15 at address 15 has a light reduction rate reaching 85%, indicating a fouled state. Also, the right window fouling degree RD15 at address 15 has a light reduction rate less than 85% but reaching 75%, indicating a sign of fouling. For the fire detection device 16 at address 15, it can be immediately grasped that the need for cleaning is quite high.

[0086] This is the same for the case based on the right window fouling display 104. The left window fouling degree LL07 at the same address 07 is combined and displayed with the right window fouling degree RD07 at address 07, which has the highest fouling degree in the right window fouling display 104. Here, since the right window fouling degree RD07 at address 07 is in a fouled state, a discriminative display indicated by diagonal lines is performed. Also, it can be immediately grasped that the left window fouling degree LD07 at the same address 07 has a low fouling degree and is in a normal state. Here too, it can be immediately grasped that the fire detection device 16 at address 15 has a quite high need for cleaning.

[0087] (Third Embodiment of Fouling Display) FIG. 9 is an explanatory diagram showing the third embodiment of the fouling display. As shown in FIG. 9, the fouling display 106 of this embodiment by the fouling display control unit 32 of the disaster prevention receiving panel 10 displays a set of the left window fouling degree LDi and the right window fouling degree RDi in the order of the address i of the fire detection device 16 side by side. The display is performed for each upward line and downward line, but only the upward line side is illustrated.

[0088] Also, similar to FIGS. 7 and 8, the fouling degree in a fouled state is discriminatively displayed as indicated by diagonal lines, and the fouling degree in a sign-of-fouling state is discriminatively displayed as indicated by sand patterns, enabling an intuitive grasp of the progress of fouling without looking at the analog value of the fouling degree.

[0089] Here, the discriminative display of the fouled state and the fouled omen state is performed for the left window fouling degree LDi and the right window fouling degree RDi in the fouled or fouled omen state. For the address i corresponding to this, the discriminative display of the fouled state or the fouled omen state is also performed. As this discriminative display, for example, in the case where the left window fouling degree LD15 is in the fouled state and the right window fouling degree RD15 is in the fouled omen state like address 15, the discriminative display of the fouled state for the higher fouling degree LD15 is preferentially performed.

[0090] Such fouling display 106 directly reads out and displays the fouling information 100 stored in the memory shown in FIG. 6 to perform discriminative display of the fouled state and the fouled omen state. According to the arrangement order of the fire detection devices 16 in the tunnel, the fouling degrees of the left and right light-transmitting windows in each fire detection device 16 are grasped, and the necessity of cleaning can be determined.

[0091] (Fourth Embodiment of Fouling Display) FIG. 10 is an explanatory diagram showing the fourth embodiment of the fouling display. As shown in FIG. 10, the fouling display 108 of this embodiment by the fouling display control unit 32 of the disaster prevention receiving board 10 displays the left window fouling degree LDi and the right window fouling degree RDi in a mixed manner in descending order of the fouling degree. The address of the fouling display 108 displays an address iL or iR obtained by combining the address i of the fire detection device 16 and the identification code L indicating the left window fire detection unit or the identification code indicating the right window fire detection unit. Note that the display is performed for each upward line and downward line, and only the upward line side is illustrated.

[0092] In this example, the left window fouling degree LD15 of address 15L is the largest, followed by the right window fouling degree RD07 of address 07R, and both are discriminative displays with diagonal lines indicating the fouled state. It can be determined that the fire detection device 16 at address 15 has a higher necessity for cleaning.

[0093] (Fifth Embodiment of Fouling Display) FIG. 11 is an explanatory diagram showing a fifth embodiment of the stain display. As shown in FIG. 11, the stain display 110 of this embodiment by the stain display control unit 32 of the disaster prevention receiver 10 is such that the left window stain degree LDi of the i-th fire detection device 16 that overlaps and monitors the same monitoring area ARi and the right window stain degree RLi+1 of the (i + 1)-th fire detection device 16 are arranged adjacent to each other, and control is performed to display them in the order of address i. The display is performed for each upward and downward line, but only the upward line side is illustrated.

[0094] For example, since the fire detection device 16 with address 01 and the fire detection device 16 with address 02 overlap and monitor the same monitoring area AR12, the right window stain degree RD01 of address 01 and the left window stain degree LD2 of address 02 are arranged adjacent to each other. This relationship is the same for other fire detection devices 16 that overlap and monitor adjacent and the same monitoring area.

[0095] Also, similar to FIGS. 7 and 8, the stain degree in the stained state is discriminatively displayed as shown by diagonal lines, and the stain degree in the stain precursor state is discriminatively displayed as shown by sandy ground, so that the progress of the stain can be grasped at a glance without looking at the analog value of the stain degree.

[0096] According to such a stain display 110, the relationship between one stain degree and the other stain degree corresponding to the respective light-transmitting windows (fire detection units) for the same monitoring area that are overlapped and monitored by two adjacent fire detection devices 16 can be easily and surely understood. For example, the right window stain degree RD07 of address 07 is in the stained state shown by diagonal lines, but the right window stain degree RD08 of address 08 that overlaps and monitors the same monitoring area AR08 is at the normal level, and it is possible to judge at a glance that the situation does not require urgent cleaning.

[0097] This also holds true for address 15 where the left window stain degree LD15 has reached the stained state. The left window stain degree LD16 of address 14 that overlaps and monitors the same monitoring area AR15 is at the normal level, and similarly, it is possible to easily judge that the situation does not require urgent cleaning.

[0098] The stain display 120 in FIG. 12 shows an embodiment in which the stain information 100 is displayed in the order of the addresses of the fire detectors 16 with the tunnel longitudinal direction as the horizontal direction.

[0099] The stain display 130 in FIG. 13 shows an embodiment in which the stain information 100 is displayed in the order of the addresses of the fire detectors 16 corresponding to the monitoring areas AR1, AR2,... in the tunnel.

[0100] When the stain displays 110, 120, and 130 in FIGS. 11 to 13 are displayed on the screen of a liquid crystal display, if they do not fit on one screen, display methods such as switching display or scrolling display will be adopted.

[0101] (Sixth Embodiment of Stain Display) As a sixth embodiment of the stain display by the stain display control unit 32 provided in the disaster prevention receiver 10, the stain displays according to the first to fifth embodiments shown in FIGS. 7 to 13 may be selectively displayed as necessary by a predetermined operation by the operation unit 26.

[0102] [Modification Example of the Present Invention] (Fire Detector) The above embodiment takes the two-wavelength type fire detector as an example, but it is not limited thereto, and other types may be used. For example, in addition to the two wavelengths described above, for the 4.4 - 4.5 μm band which is the resonance radiation band of CO2, the radiation energy in the wavelength band near, for example, 3.8 μm on the short wavelength side is detected by the same method as the two-wavelength type, and it may be a three-wavelength type flame detector that determines the presence or absence of a flame based on the relative ratio of each received light signal in these three wavelength bands.

[0103] (Detection of Stain Prediction State and Stain State) In the above-described embodiment, the fire detection device detects the warning state and the warning state and transmits them to the disaster prevention receiving panel, but it is not limited thereto. For example, since the disaster prevention receiving panel collects and stores the left window contamination degree and the right window contamination degree of the fire detection device, when the left window contamination degree or the right window contamination degree reaches a predetermined contamination warning threshold by the contamination display control unit of the disaster prevention receiving panel, the contamination warning state is identified and displayed on the left window contamination degree or the right window contamination degree. Also, when the left window contamination degree or the right window contamination degree reaches a predetermined contamination threshold higher than the contamination warning threshold, it is also possible to identify and display the contamination state on the left window contamination degree or the right window contamination degree. This can reduce the processing load on the fire detector device side.

[0104] Note that the left window and the right window may be, for example, a single light-transmitting window curved so as to cover the right light-receiving part from the left light-receiving part. In this case, the portion corresponding to the front of the sensor of the left fire detection unit (light-receiving unit) is equivalent to the left light-transmitting window of the present embodiment, and the portion corresponding to the front of the sensor of the right fire detection unit (light-receiving unit) is equivalent to the right light-transmitting window.

[0105] (Display content of contamination degree) In the above-described embodiment, the contamination display control unit of the disaster prevention receiving panel displays the left window contamination degree and the right window contamination degree as analog values (light reduction rate) of the contamination degree, but it is not limited thereto. For example, it may be displayed by characters, symbols, figures, or colors indicating the degree of contamination in multiple stages. By displaying the degree of contamination in multiple stages by characters, symbols, figures, or colors in this way, it is possible to intuitively grasp the degree of contamination and determine the necessity of cleaning.

[0106] Note that in each embodiment of the contamination display shown in FIGS. 7 to 13, the numerical display of the contamination degree is not essential and may be omitted. Even when the numerical display of the contamination degree is omitted, the object of the present invention can be achieved without changing the fact that the urgency and priority of cleaning can be grasped easily and efficiently.

[0107] Also, in each embodiment of the contamination display shown in FIGS. 7 to 13, the contamination degree or the degree of contamination may be displayed in the order of monitoring areas with a high degree of cleaning urgency.

[0108] (Others) The present invention also includes appropriate modifications that do not impair its objectives and advantages, and is not limited by the numerical values shown in the above embodiments.

Explanation of Reference Numerals

[0109] 1a: Upward Line Tunnel 1b: Downward Line Tunnel 10: Disaster Prevention Receiver Panel 12a, 12b: Signal Lines 16: Fire Detection Device 16L: Left Window Fire Detection Unit 16R: Right Window Fire Detection Unit 18, 34: Control Unit 20a, 20b, 35: Transmission Unit 31: Fire Monitoring Control Unit 32: Contamination Display Control Unit 36L: Left Translucent Window 36R: Right Translucent Window 38a, 38b: Light Receiving Unit 40a, 40b: Amplification Processing Unit 42: Test Light Source Unit 44: Contamination Light Receiving Unit 46: Amplification Unit 48: Fire Judgment Unit 50: Contamination Processing Unit

Claims

1. A disaster prevention system that monitors for the occurrence of a fire in a plurality of continuous monitoring areas by arranging a fire detection device at each boundary of the monitoring areas, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Equipped with The fire detection device includes: a first light-transmitting window and a second light-transmitting window that are in contact with the boundaries of the monitoring areas in which the fire detection devices are arranged and correspond to the adjacent monitoring areas, determining whether or not a fire has occurred in each of the adjacent monitoring areas by receiving light rays from each of the adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window; detecting a first window soiling degree indicating a soiling state of the first light-transmitting window corresponding to one of the adjacent monitoring areas and a second window soiling degree indicating a soiling state of the second light-transmitting window corresponding to the other of the adjacent monitoring areas; The control unit is Based on the first window soiling degree and the second window soiling degree detected by the plurality of fire detection devices, the display unit displays the first window soiling degree of one of the fire detection devices and the second window soiling degree of the other of the fire detection devices, which are arranged on the adjacent boundaries and correspond to the same monitoring area that is monitored in an overlapping manner, in association with each other; A disaster prevention system characterized in that it is possible to determine whether or not the need for cleaning of the first translucent window and the second translucent window is imminent by displaying a correspondence between the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device corresponding to the same monitoring area.

2. The disaster prevention system according to claim 1, A disaster prevention system characterized in that, as a display correlating the first window contamination degree of one of the fire detection devices corresponding to the same monitoring area with the second window contamination degree of the other of the fire detection devices, the first window contamination degree of one of the fire detection devices and the second window contamination degree of the other of the fire detection devices corresponding to the same monitoring area are arranged adjacent to each other, and the adjacent pairs of the first window contamination degree and the second window contamination degree are arranged in accordance with the arrangement order of the multiple fire detection devices.

3. The disaster prevention system according to claim 1, A disaster prevention system characterized in that, as a display correlating the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device corresponding to the same monitoring area, the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device are arranged adjacent to each other corresponding to the same monitoring area, and the adjacent pairs of the first window contamination degree and the second window contamination degree are displayed together with area information indicating the corresponding monitoring area in accordance with the order of the multiple consecutive monitoring areas.

4. A disaster prevention system that monitors for the occurrence of a fire in a plurality of continuous monitoring areas by arranging a fire detection device at each boundary of the monitoring areas, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Equipped with The fire detection device includes: a first light-transmitting window and a second light-transmitting window that are in contact with the boundaries of the monitoring areas in which the fire detection devices are arranged and correspond to the adjacent monitoring areas, determining whether or not a fire has occurred in each of the adjacent monitoring areas by receiving light rays from each of the adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window; detecting a first window soiling degree indicating a soiling state of the first light-transmitting window corresponding to one of the adjacent monitoring areas and a second window soiling degree indicating a soiling state of the second light-transmitting window corresponding to the other of the adjacent monitoring areas; The control unit is The first window contamination degree and the second window contamination degree detected by the plurality of fire detection devices are displayed on the display unit in a predetermined order, A disaster prevention system characterized in that the first window contamination degree and the second window contamination degree are displayed in a identifiable manner, such as a normal state in which the contamination degree has not reached a predetermined contamination sign threshold, a contamination sign state in which the contamination degree has reached the contamination sign threshold, and a contamination state in which the contamination degree has reached a predetermined contamination threshold that is higher than the contamination sign threshold.

5. The disaster prevention system according to claim 4, The control unit is The first window soiling degree, the second window soiling degree, and the identification information set for each fire detection device are associated with each other in the same fire detection device, and the associated sets of the first window soiling degree, the second window soiling degree, and the identification information are arranged in the order of arrangement of the plurality of fire detection devices and displayed on the display unit, A disaster prevention system characterized in that, among the degree of contamination displayed by either the first window contamination degree or the second window contamination degree and the degree of contamination displayed by the other of the first window contamination degree or the second window contamination degree, a state with a higher degree of contamination is displayed preferentially in the identification information.

6. A disaster prevention receiving panel that connects fire detection devices arranged at the boundaries of a plurality of continuous monitoring areas to monitor occurrence of fires in the monitoring areas, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Equipped with The control unit is based on the first window soiling degree indicating the soiling state of a first light-transmitting window corresponding to one of the adjacent monitoring areas detected by the plurality of fire detection devices and the second window soiling degree indicating the soiling state of a second light-transmitting window corresponding to the other of the adjacent monitoring areas, the display unit displays in association with the first window soiling degree of one of the fire detection devices and the second window soiling degree of the other of the fire detection devices, which are disposed on the adjacent boundaries and corresponding to the same monitoring area that is monitored in an overlapping manner, This disaster prevention receiving panel is characterized in that it makes it possible to determine whether or not there is an imminent need to clean the first and second light-transmitting windows by displaying the correspondence between the degree of first window contamination of one fire detection device and the degree of second window contamination of the other fire detection device corresponding to the same monitoring area.

7. 7. The disaster prevention receiving panel according to claim 6, A disaster prevention receiving panel characterized in that, as a display correlating the first window contamination degree of one of the fire detection devices corresponding to the same monitoring area with the second window contamination degree of the other of the fire detection devices, the first window contamination degree of one of the fire detection devices and the second window contamination degree of the other of the fire detection devices corresponding to the same monitoring area are arranged adjacent to each other, and the adjacent pairs of the first window contamination degree and the second window contamination degree are arranged in the order of the arrangement of the multiple fire detection devices.

8. 7. The disaster prevention receiving panel according to claim 6, A disaster prevention receiving panel characterized in that the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device corresponding to the same monitoring area are displayed in correspondence with each other, with the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device corresponding to the same monitoring area being arranged adjacent to each other, and the adjacent pairs of the first window contamination degree and the second window contamination degree being displayed together with area information indicating the corresponding monitoring area in accordance with the order of the multiple consecutive monitoring areas.

9. A disaster prevention receiving panel that connects fire detection devices arranged at the boundaries of a plurality of continuous monitoring areas to monitor occurrence of fires in the monitoring areas, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Equipped with The control unit is displaying, on the display unit in a predetermined order, the first window soiling degree, which indicates a soiling state of a first light-transmitting window corresponding to one of the adjacent monitoring areas detected by the plurality of fire detection devices, and the second window soiling degree, which indicates a soiling state of a second light-transmitting window corresponding to the other of the adjacent monitoring areas; This disaster prevention receiving panel is characterized in that the first window contamination degree and the second window contamination degree are displayed in such a way that they can be distinguished as a normal state in which the contamination degree has not reached a predetermined contamination sign threshold, a contamination sign state in which the contamination degree has reached the contamination sign threshold, and a contamination state in which the contamination degree has reached a predetermined contamination threshold that is higher than the contamination sign threshold.

10. The disaster prevention receiving panel according to claim 9, The control unit is The first window soiling degree, the second window soiling degree, and the identification information set for each fire detection device are associated with each other in the same fire detection device, and the associated sets of the first window soiling degree, the second window soiling degree, and the identification information are arranged in the order of arrangement of the plurality of fire detection devices and displayed on the display unit, This disaster prevention receiving panel is characterized in that, among the degree of contamination displayed by either the first window contamination degree or the second window contamination degree and the degree of contamination displayed by the other of the first window contamination degree or the second window contamination degree, the state with a higher degree of contamination is displayed preferentially in the identification information.

11. A fire detection device disposed at each boundary of a plurality of continuous monitoring areas is connected to a disaster prevention receiving panel to monitor occurrence of a fire in the monitoring areas; The disaster prevention receiving panel, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Established A disaster prevention method for a disaster prevention system, in which the fire detection device is provided with a first light-transmitting window and a second light-transmitting window that are in contact with a boundary of the monitoring area in which the fire detection device is arranged and correspond to each of the monitoring areas adjacent to each other, comprising: The fire detection device, determining whether or not a fire has occurred in each of the adjacent monitoring areas by receiving light rays from each of the adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window; detecting a first window soiling degree indicating a soiling state of the first light-transmitting window corresponding to one of the adjacent monitoring areas and a second window soiling degree indicating a soiling state of the second light-transmitting window corresponding to the other of the adjacent monitoring areas; The control unit, Based on the first window soiling degree and the second window soiling degree detected by the plurality of fire detection devices, the display unit displays the first window soiling degree of one of the fire detection devices and the second window soiling degree of the other of the fire detection devices, which are arranged on the adjacent boundaries and correspond to the same monitoring area that is monitored in an overlapping manner, in association with each other; A disaster prevention method characterized in that it is possible to determine whether or not there is an imminent need to clean the first and second light-transmitting windows by displaying a correspondence between the first window contamination level of one fire detection device and the second window contamination level of the other fire detection device corresponding to the same monitoring area.

12. The disaster prevention method according to claim 11, A disaster prevention method characterized in that, as a display correlating the first window contamination degree of one of the fire detection devices corresponding to the same monitoring area with the second window contamination degree of the other of the fire detection devices, the first window contamination degree of one of the fire detection devices and the second window contamination degree of the other of the fire detection devices corresponding to the same monitoring area are arranged adjacent to each other, and the adjacent pairs of the first window contamination degree and the second window contamination degree are arranged in accordance with the arrangement order of the multiple fire detection devices.

13. The disaster prevention method according to claim 11, A disaster prevention method characterized in that, as a display correlating the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device corresponding to the same monitoring area, the first window contamination degree of one fire detection device and the second window contamination degree of the other fire detection device are arranged adjacent to each other corresponding to the same monitoring area, and the adjacently arranged pairs of the first window contamination degree and the second window contamination degree are displayed together with area information indicating the corresponding monitoring area in accordance with the arrangement order of the multiple consecutive monitoring areas.

14. A fire detection device disposed at each boundary of a plurality of continuous monitoring areas is connected to a disaster prevention receiving panel to monitor occurrence of a fire in the monitoring areas; The disaster prevention receiving panel, A display unit that displays information about the fire detection device; A control unit that causes the display unit to display the information; Established A disaster prevention method for a disaster prevention system, in which the fire detection device is provided with a first light-transmitting window and a second light-transmitting window that are in contact with a boundary of the monitoring area in which the fire detection device is arranged and correspond to each of the monitoring areas adjacent to each other, comprising: The fire detection device, determining whether or not a fire has occurred in each of the adjacent monitoring areas by receiving light rays from each of the adjacent monitoring areas through the first light-transmitting window and the second light-transmitting window; detecting a first window soiling degree indicating a soiling state of the first light-transmitting window corresponding to one of the adjacent monitoring areas and a second window soiling degree indicating a soiling state of the second light-transmitting window corresponding to the other of the adjacent monitoring areas; The control unit, The first window contamination degree and the second window contamination degree detected by the plurality of fire detection devices are displayed on the display unit in a predetermined order, A disaster prevention method characterized in that the first window contamination degree and the second window contamination degree are identifiably displayed as a normal state in which the contamination degree has not reached a predetermined contamination sign threshold, a contamination sign state in which the contamination degree has reached the contamination sign threshold, and a contamination state in which the contamination degree has reached a predetermined contamination threshold that is higher than the contamination sign threshold.

15. The disaster prevention method according to claim 14, The control unit, The first window soiling degree, the second window soiling degree, and the identification information set for each fire detection device are associated with each other in the same fire detection device, and the associated sets of the first window soiling degree, the second window soiling degree, and the identification information are arranged in the order of arrangement of the plurality of fire detection devices and displayed on the display unit, A disaster prevention method characterized in that a higher degree of contamination is preferentially displayed in the identification information between a degree of contamination displayed in either the first window contamination degree or the second window contamination degree and a degree of contamination displayed in the other of the first window contamination degree or the second window contamination degree.

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