Disaster Prevention System

Abstract

To appropriately determine the necessity of cleaning by grasping contamination states of translucent windows which are provided correspondingly to both right-side and left-side monitoring areas.SOLUTION: A disaster prevention system for monitoring occurrence of a fire in a monitoring area by disposing a fire detection device for each boundary of a plurality of continued monitoring areas, comprises a display unit which displays information relating to the fire detection device, and a control unit which causes the display unit to display the information. The fire detection device detects a first window contamination degree indicating a contamination state of a first translucent window and a second window contamination degree indicating a contamination state of a second translucent window. On the basis of the first window contamination degree and the second window contamination degree, the control unit causes the display unit to display a pair of the first window contamination degree and the second window contamination degree in the order of disposing a plurality of fire detection devices in such a manner that the first window contamination degree of one fire sensor and the second window contamination degree of the other fire sensor, the fire sensors being respectively disposed in adjacent boundaries, are displayed side by side.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a disaster prevention system that monitors for fires in monitoring areas divided at predetermined intervals along the longitudinal direction of a tunnel by fire detection devices connected to a signal line drawn from a disaster prevention receiving panel. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in tunnels for expressways and the like, fire detection devices that monitor for fires are installed to protect people and vehicles from fire accidents that may occur within the tunnel, and the fire detection devices are connected to a signal line drawn from a disaster prevention receiving panel.

[0003] Fire detection devices are installed at the boundaries of monitoring areas divided along the length of the tunnel at intervals of, for example, 25 m or 50 m. The fire detection devices have detection areas on both the left and right sides, and adjacent fire detection devices redundantly monitor for fires 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, such as infrared rays, from fire flames occurring within the tunnel through the light-transmitting windows.

[0005] The fire detection devices installed in the tunnels become increasingly dirty over time due to the adhesion of polluting substances floating in the environment, so in order to maintain their flame monitoring function, the dirt on the transparent windows is monitored and the transparent windows are cleaned at regular intervals.

[0006] The contamination monitoring of the light-transmitting window is carried out by periodically shining test light from a test light source installed in the fire detection device through the space on the detection area side outside the detection device, entering the light-transmitting window and receiving the light with a light receiving element, and by comparing the light receiving level at this time with that at the initial uncontaminated time, the light attenuation rate is calculated as the degree of contamination, and if the degree of contamination exceeds a predetermined threshold, a contamination signal is sent to the disaster prevention receiving panel to output a contamination alarm. When a contamination alarm for the fire detection device is output, it is necessary to take measures to clean the light-transmitting window of the fire detection device that has become contaminated.

[0007] In addition, a lower contamination threshold is set for the contamination threshold, and when the degree of contamination exceeds the contamination threshold, a contamination signal is sent to the disaster prevention receiving panel to output a contamination warning. Regarding the contamination warning for fire detection devices, if the number of fire detection devices that have become contamination warning status increases, it becomes possible to take measures such as reconsidering the plan and bringing forward the timing of cleaning work when there is a long period until the scheduled regular cleaning.

[0008] Incidentally, as a method of monitoring the contamination of fire detection devices using a disaster prevention receiving panel, the degree of contamination progress such as normal, signs of contamination, and contamination is displayed in order along the length of the tunnel based on the level of contamination detected by the fire detection device, which makes it possible to grasp the degree of contamination and contamination trends of the fire detection devices throughout the tunnel (Patent Document 1). [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2000-315285 A [Patent Document 2] JP 2002-063664 A Summary of the Invention [Problem to be solved by the invention]

[0010] Incidentally, in a disaster prevention system in which the disaster prevention receiving panel displays the degree of contamination (normal, signs of contamination, and contamination) in the order of the length of the tunnel based on the degree of contamination detected by a fire detection device, the fire detection device does not distinguish between the contamination states of the right and left translucent windows installed corresponding to the left and right monitoring areas.If the degree of contamination of both translucent windows does not reach the contamination sign threshold, it is determined to be normal; if either of the translucent windows exceeds the contamination sign threshold, it is determined to be signs of contamination; and if either of the translucent windows exceeds the contamination threshold, it is determined to be contaminated, and the degree of contamination is displayed in the order of the length of the tunnel.

[0011] The display of the soiling state of the fire detection device by such a disaster prevention receiving panel is intended to show the necessity of cleaning the light-transmitting window installed in the fire detection device, but when considering the necessity of cleaning the light-transmitting window of the fire detection device and planning the cleaning work, it is not necessarily efficient to display the degree of soiling state in the order of the tunnel length (arrangement order). Also, in conventional disaster prevention systems, the soiling state is displayed without distinguishing between the left and right light-transmitting windows, so the necessity of cleaning may not be accurately judged.

[0012] For example, even if the degree of contamination is displayed in the longitudinal direction of the tunnel, it is still necessary to visually search for which detection devices need cleaning or which ones require cleaning with the highest urgency.

[0013] For example, when it comes to the contamination state of a fire detection device installed inside a tunnel, depending on the direction of the air currents flowing through the tunnel, the contamination may progress more quickly in one of the light-transmitting windows installed on the left and right sides than in the other. For this reason, even if one light-transmitting window of a certain fire detection device is in a pre-defective state, the other light-transmitting window may be normal (not soiled or only lightly soiled). In such a case, the disaster prevention receiving panel will show that the light-transmitting window of the fire detection device is in a pre-defective state. In this case, the urgency is not as high as when both light-transmitting windows are in a pre-defective state, but this fact cannot be grasped immediately, making it inefficient.

[0014] In addition, in the case of adjacent fire detection devices that monitor the same monitoring area in an overlapping manner, even if the light-transmitting window of one of the fire detection devices monitoring the same monitoring area becomes dirty, if the light-transmitting window of the other fire detection device monitoring the same monitoring area is in a normal state, the monitoring function for that monitoring area will be maintained by monitoring through the light-transmitting window of the fire detection device that is in a normal state. Knowing this means that there is relatively ample time to clean the soiled fire detection device. However, even in this case, with conventional displays that do not take into account dirt on the left and right light-transmitting windows, it may be necessary to rush more than necessary to clean the soiled fire detection device, and the need for cleaning may not be properly determined.

[0015] The present invention aims to provide a disaster prevention system that can grasp the state of dirt on translucent windows installed in correspondence with the monitoring areas on both the left and right sides of a fire detection device and appropriately determine the need for cleaning. [Means for solving the problem]

[0016] (Disaster prevention monitoring system) The present invention provides a disaster prevention system that monitors the occurrence of a fire in a plurality of continuous monitoring areas by arranging a fire detection device at each boundary between 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; Equipped with Fire detection devices include: a first light-transmitting window and a second light-transmitting window are provided adjacent to the boundaries of the monitoring areas in which the fire detection device is disposed 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 the respective monitoring areas via the first light-transmitting window and the second light-transmitting window; detecting a first window soiling degree indicating a soiling state of a first light-transmitting window corresponding to one of the mutually adjacent monitoring areas and a second window soiling degree indicating a soiling state of a second light-transmitting window corresponding to the other of the mutually 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, a pair of one first window soiling degree and the other second window soiling degree is displayed on the display unit in the order of arrangement of the plurality of fire detection devices, so that one first window soiling degree of one fire detection device and another second window soiling degree of another fire detection device corresponding to the same monitoring area that are respectively arranged on adjacent boundaries and monitored in an overlapping manner are arranged side by side, The first window soiling degree and the second window soiling degree are characterized in that a normal state is identifiable and displayed when the soiling degree does not reach a predetermined soiling sign threshold, a soiling sign state is identifiable and displayed when the soiling degree reaches the soiling sign threshold, and a soiled state is identifiable and displayed when the soiling degree reaches a predetermined soiling threshold which is higher than the soiling sign threshold. Effect of the Invention

[0017] The present invention relates to 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 from a receiving device, the fire detection device comprising a fire determination unit which receives radiation from two monitoring areas through corresponding light-transmitting windows, converts the radiation into an electric signal, and transmits a fire determination signal to the receiving device when it determines that a fire has occurred in the corresponding monitoring area based on the electric signal, and a dirt detection unit which detects a first window dirt level indicating the dirt state of one light-transmitting window and a second window dirt level indicating the dirt state of the other light-transmitting window, and transmits a dirt level detection signal corresponding to the first window dirt level to the receiving device, The system is equipped with a fire monitoring control unit that receives a fire determination signal from the fire detection device and issues an alarm, and a dirt display control unit that displays the first window dirt level and the second window dirt level received from the multiple fire detection devices in a predetermined order.Therefore, for example, in a case where multiple fire detection devices are installed on the boundaries of monitoring areas divided at predetermined intervals along the longitudinal direction of a tunnel and monitor fires in the monitoring areas corresponding to the first and second light-transmitting windows, the first window dirt level and the second window dirt level provided on the multiple fire detection devices are displayed in a predetermined order on the receiving device, making it possible to grasp the dirt level, such as normal, signs of dirt, or dirt, for each of the first and second light-transmitting windows, and appropriately determine the need for cleaning of the light-transmitting windows.

[0018] (The effect of dividing the left and right windows into two groups and displaying them in order of the degree of damage) In addition, the contamination display control unit of the receiving device is configured to divide the first window contamination levels and second window contamination levels of multiple fire detection devices and display them in order of greatest contamination level, so that the contamination levels of the fire detection devices are divided into the first and second light-transmitting windows and displayed in order of greatest contamination level, and the contamination levels of the light-transmitting windows that are most in need of cleaning are displayed, for example, at the top, making it possible to appropriately determine the need for cleaning.

[0019] (Effect of combining and displaying the degree of dirt on the left and right windows) Furthermore, the dirt display control unit displays the first window dirt levels in combination with the corresponding second window dirt levels, and displays the second window dirt levels in combination with the corresponding first window dirt levels, so that the second window dirt levels of the same fire detection device are displayed in correspondence with, for example, the first window dirt levels displayed at the top in order of dirt level, making it possible to appropriately determine the need for cleaning taking into account the first and second dirt levels.

[0020] (Effect of indicating the degree of contamination in the order of fire detection devices) In addition, the contamination display control unit of the receiving device is configured to display sets of the first window contamination levels and second window contamination levels of multiple fire detection devices in the arrangement order of the multiple fire detection devices, so that sets of the first window contamination levels and the right window contamination levels are displayed in the direction in which the fire detection devices are arranged inside the tunnel, making it possible to appropriately determine the need for cleaning by taking into account the first and second contamination levels corresponding to their placement inside the tunnel.

[0021] (The effect of displaying the degree of soiling of the left and right windows in order of the degree of soiling) In addition, the dirt display control unit of the receiving device is configured to display the first window dirt levels and second window dirt levels of multiple fire detection devices in a mixed order in descending order of dirt level.By displaying the first window dirt levels and second window dirt levels in descending order of dirt level, it is possible to identify the translucent windows that are most in need of cleaning and appropriately determine the need for cleaning.

[0022] (Effect of displaying the degree of contamination of overlapping areas in order) In addition, the contamination display control unit of the receiving device displays the sets of the first window contamination levels and the second window contamination levels of the multiple fire detection devices in the order in which the multiple fire detection devices are arranged, so that the contamination levels of one fire detection device and the other fire detection device that overlappingly monitor the same monitoring area are lined up adjacent to each other.This makes it possible to easily and reliably understand the relationship between the contamination levels of one fire detection device and the contamination levels of the other fire detection devices corresponding to the respective translucent windows for the same monitoring area that is overlappingly monitored by two adjacent fire detection devices.For example, even if the contamination level of one fire detection device has reached the contamination level, if the contamination level of the other fire detection device is within the normal level, it is not possible to monitor the monitoring area in an overlapping manner, but it is monitored normally by the other fire detection device whose contamination level is at the normal level, and it is possible to determine that even if the contamination level of one fire detection device has reached the contamination level, there is no urgent need for cleaning, making it possible to appropriately determine the need for cleaning.

[0023] (Effect of identifying signs of fouling and fouling using fire detection equipment and displaying the identification information on the receiving device) In addition, the dirt detection unit of the fire detection device transmits a dirt precursor signal indicating a dirt precursor state to the receiving device when the first window dirt degree or the second window dirt degree reaches a predetermined dirt precursor threshold, and transmits a dirt signal to the receiving device when the first window dirt degree or the second window dirt degree reaches a predetermined dirt threshold higher than the dirt precursor threshold, and the dirt display control unit of the receiving device causes the left window dirt degree or right window dirt degree corresponding to the dirt precursor signal to be identified and displayed as a dirt precursor state, and the first window dirt degree or second window dirt degree corresponding to the dirt signal to be identified and displayed as a dirt state.Therefore, for example, when the first window dirt degrees and the second window dirt degrees are divided and displayed in order of decreasing dirt degrees, it can be easily understood from the respective identification displays whether the highest dirt degree displayed at the top is in a dirty state or in a dirt precursor state, making it possible to more appropriately determine the need for cleaning when the dirt degrees are displayed in order of decreasing dirt degrees.

[0024] (Effects of detecting signs of contamination and identifying contamination on receiving equipment and displaying identification marks) In addition, the dirt display control unit of the receiving device is configured to identify and display a dirt pre-signal state for the first window dirt degree or the second window dirt degree when the first window dirt degree or the second window dirt degree reaches a predetermined dirt threshold, and to identify and display a dirt state for the first window dirt degree or the second window dirt degree when the first window dirt degree or the second window dirt degree reaches a predetermined dirt threshold higher than the dirt pre-signal threshold.This makes it easy to understand from the respective identification displays whether the display of a higher dirt degree indicates a dirt state or a dirt pre-signal state, and makes it possible to more appropriately determine the need for cleaning when the dirt degrees are displayed in order of decreasing dirt level.

[0025] In addition, by centralizing the determination of the contamination warning state and the contamination state in the receiving device, the processing burden on the fire detection device can be reduced. [Brief description of the drawings]

[0026] [Figure 1] An explanatory diagram showing an overview of the disaster prevention system according to the present invention, taking a fire monitoring in a tunnel as an example. [Diagram 2] An explanatory diagram showing the alert area in a tunnel that is monitored by multiple fire detection devices [Diagram 3] Block diagram showing the outline of the functional configuration of a fire detection device [Figure 4] An explanatory diagram showing the appearance of a fire detection device [Diagram 5] Block diagram showing the outline of the functional configuration of the disaster prevention receiving panel [Figure 6] A diagram showing a list of the damage information stored in the memory of the disaster prevention receiving panel. [Figure 7] FIG. 1 is an explanatory diagram showing a first embodiment of a stain display; [Figure 8] FIG. 11 is an explanatory diagram showing a second embodiment of a stain display; [Figure 9] FIG. 11 is an explanatory diagram showing a third embodiment of a stain display; [Figure 10] FIG. 11 is an explanatory diagram showing a fourth embodiment of a stain display; [Figure 11] FIG. 13 is an explanatory diagram showing a fifth embodiment of a stain display; [Figure 12] FIG. 13 is an explanatory diagram showing another display form according to the fifth embodiment. [Figure 13] FIG. 13 is an explanatory diagram showing another display form according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] [Disaster prevention system overview] Fig. 1 is an explanatory diagram showing an overview of a disaster prevention system according to the present invention, taking a fire monitoring system for a tunnel as an example. As shown in Fig. 1, an up-line tunnel 1a and an out-line tunnel 1b are constructed as tunnels for a motorway.

[0028] Inside the up-bound tunnel 1a and the down-bound tunnel 1b, fire detection devices 16 are installed at intervals of, for example, 50 meters along the walls in the longitudinal direction of the tunnel. Each fire detection device 16 has two sets of light receiving units with translucent windows on the left and right, providing monitoring areas on both the left and right sides of the longitudinal direction of the tunnel on the up-bound and down-bound sides, and is continuously installed along the longitudinal direction of the tunnel so that the monitoring areas of adjacent fire detection devices overlap.

[0029] From the disaster prevention receiving panel 10, which functions as a receiving device, power and signal lines 12a, 12b are drawn out to the up line tunnel 1a and the down line tunnel 1b, and the fire detection device 16 is connected, and a unique address is set in advance in sequence to the fire detection device 16. Note that a unique ID (identifier) ​​may be set in sequence to the fire detection device 16 instead of the address.

[0030] FIG. 2 is an explanatory diagram showing monitoring areas in a tunnel that are monitored by overlapping fire detection devices, taking the up-track tunnel 1a in FIG. 1 as an example.

[0031] As shown in Fig. 2, fire detection devices 16 are installed at intervals of 50 meters along the side walls of the up-bound tunnel 1a. The tunnel is divided 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 is, for example, 50 m in the longitudinal direction and 20 m in the transverse direction.

[0032] The fire detection device 16 is provided with a left window light receiving section having a left light-transmitting window (first window) and a right window light receiving section having a right light-transmitting window (second window) for separately monitoring the left and right monitoring areas. Here, in this embodiment, the left-right relationship of the fire detection device 16 is determined when the fire detection device 16 is viewed from the front.

[0033] For example, the i-th fire detection device 16 located at the left end of a monitoring area ARi and the (i+1)-th fire detection device 16 located at the right end monitor the monitoring area ARi using the right window light receiving unit of the i-th fire detection device 16, and at the same time, redundantly monitor the same monitoring area ARi using the left window light receiving unit of the (i+1)-th fire detection device 16.

[0034] The first monitoring area AR1 on the tunnel entrance side is monitored solely by the left window light receiving unit of the first fire detection device 16.

[0035] The fire detection device 16 monitors fires by observing radiation, such as infrared rays, from flames caused by a fire within the left or right monitoring area using the left window light receiving unit, and also monitors fires by observing the radiation, such as infrared rays, from flames caused by a fire using the right window light receiving unit.If a fire is detected, it transmits a fire signal to the disaster prevention receiving panel 10, which includes a preset unique address and identification information indicating whether the fire was detected from the left or right window.

[0036] In addition, the fire detection device 16 detects contamination of the translucent windows provided in the light receiving section independently on the left and right sides at a cycle, for example, once a day, and transmits a contamination detection signal to the disaster prevention receiving panel 10, which includes the detected degree of contamination and identification information indicating whether the left or right window was detected.

[0037] Furthermore, when the periodically detected degree of contamination exceeds a predetermined contamination threshold, the fire detection device 16 transmits a contamination signal including contamination information and identification information indicating whether the left or right window was detected to the disaster prevention receiving panel 10, and when the degree of contamination exceeds a predetermined contamination threshold, the fire detection device 16 transmits a contamination signal including contamination information and identification information indicating whether the left or right window was detected to the disaster prevention receiving panel 10.

[0038] [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.

[0039] 3, the fire detection device 16 includes a left window fire detection unit 16L and a right window fire detection unit 16R, and as shown representatively in the left window fire detection unit 16L, includes light receiving units 38a, 38b including light receiving sensors, amplification processing units 40a, 40b corresponding to the light receiving units 38a, 38b, a control unit 34, and a transmission unit 35. A left light-transmitting window 36L provided in the detector cover is disposed in front of the light receiving units 38a, 38b, and light energy from the external monitoring area is incident on the light receiving units 38a, 38b through the left light-transmitting window 36L.

[0040] Further, in order to monitor the left light-transmitting window 36L for dirt, a dirt detection section made up of a test light source section 42, a dirt light receiving section 44 and an amplifier section 46 is provided.

[0041] Here, as shown in Fig. 4, the fire detection device 16 is provided with a left light-transmitting window 36L and a right light-transmitting window 36R in a sensor housing section 54 provided in the upper part of a housing 52, and the light receiving sections and the like of the left window fire detection section 16L and the right window fire detection section 16R shown in Fig. 3 are arranged inside the left light-transmitting window 36L and the right light-transmitting window 36R, respectively. In addition, two sets of test light source light-transmitting windows 56 housing individual test light source sections 42 are provided near the left light-transmitting window 36L and the right light-transmitting window 36R at positions where the light receiving sections can be seen through.

[0042] 3, 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, and uses, for example, a computer circuit equipped with a CPU, memory, various input / output ports, etc. as hardware. The control unit 34 is also provided with a fire determination unit 48 and a defacement processing unit 50 as functions realized by executing a program.

[0043] The left window fire detection unit 16L monitors fires, for example, using a two-wavelength flame detection principle. The light receiving unit 38a selectively transmits radiation of 4.4 to 4.5 μm, which is the resonance radiation band of CO2 specific to flames, from the light energy incident through the left light-transmitting window 36L using an optical wavelength bandpass filter, and the radiation energy is photoelectrically converted by the light receiving sensor. The amplifier processing unit 40a then performs predetermined processing such as amplification to convert the radiation energy into a received light signal corresponding to the amount of energy, and outputs it to the control unit 34.

[0044] The light receiving unit 38b selectively transmits radiation energy of 5 to 6 μm from the light energy incident through the left-side transparent window 36L using an optical wavelength bandpass filter, detects the radiation energy using a light receiving sensor and performs photoelectric conversion.Then, the amplification processing unit 40b performs predetermined processing such as amplification to convert the received light signal corresponding to the amount of energy and outputs it to the control unit 34.

[0045] A fire detection unit 48 provided in the control unit 34, for example, takes the relative ratio of the light receiving signal levels output from the amplification processing units 40a, 40b and compares it with a predetermined threshold value to determine the presence or absence of a flame, and if a fire is detected by determining that there is a flame, it instructs the transmission unit 35 to set fire detection information and identification information indicating left window detection in a response message to a call message from the disaster prevention receiving panel 10 that matches its own address, thereby controlling the transmission of the response message to the disaster prevention receiving panel 10 as a fire detection signal.

[0046] The soiling detection unit, which is composed of a test light source unit 42, a soiled light receiving unit 44, and an amplifier unit 46, blinks the test light source unit 42 at a predetermined cycle, for example once a day, in response to instructions from the soiling processing unit 50 of the control unit 34 to emit a predetermined test light, which enters the soiled light receiving unit 44 through the left side translucent window 36L. This test light is converted into an electrical signal by a light receiving sensor provided in the soiled light receiving unit 44, amplified by the amplifier unit 46, and a soiling detection signal corresponding to the degree of soiling of the left side translucent window 36L is output to the control unit 34.

[0047] When a contamination detection signal is obtained from the amplifier 46, the contamination processing unit 50 of the control unit 34 detects the contamination level by comparing the prerecorded contamination detection signal level when there is no contamination with the contamination detection signal level obtained by the contamination processing to calculate the current contamination level. The control unit 34 is instructed to transmit the detected contamination level as a contamination detection signal to the disaster prevention receiving panel 10 by setting contamination information indicating the contamination level value and identification information indicating left window detection in a response message to a call message matching the self address.

[0048] The above-mentioned contamination detection by the contamination processing unit 50 is performed upon receiving a contamination processing instruction signal from the disaster prevention receiving panel 10 periodically (for example, once a day), and the contamination detection signal can also be sent back as a response signal to this.

[0049] In addition, when the detected degree of contamination exceeds a predetermined contamination prediction threshold, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35 to set contamination prediction information and identification information indicating left window detection in a response message to a call message (or the previous contamination processing execution instruction signal) that matches its own address, thereby controlling the transmission to be made to the disaster prevention receiving panel 10 as a contamination prediction signal.

[0050] Here, when a degree of contamination is added to the contamination information transmitted to the disaster prevention receiving panel 10, the comparison process with the contamination sign threshold and the judgment of the contamination sign may be performed on the disaster prevention receiving panel 10 side. In this case, the contamination sign threshold is set and registered in the disaster prevention receiving panel 10.

[0051] In addition, when the degree of contamination based on the contamination detection signal from the amplifier unit 46 exceeds a predetermined contamination threshold value that is higher than the contamination prediction threshold value, the contamination processing unit 50 of the control unit 34 instructs the transmission unit 35 to set contamination information and identification information indicating left window detection in a call message from the disaster prevention receiving panel 10 that matches its own address, thereby controlling the transmission of the call message to the disaster prevention receiving panel 10 as a contamination signal.

[0052] When the degree of contamination is added to the contamination information transmitted to the disaster prevention receiving panel 10, the comparison with the contamination threshold and the determination of contamination may be performed on the disaster prevention receiving panel 10 side. In this case, the contamination threshold is set and registered in the disaster prevention receiving panel 10.

[0053] Here, the contamination processing unit 50 of the control unit 34 determines the light attenuation rate of the left translucent window 36L, which indicates the degree of contamination, based on the contamination detection signal from the amplifier unit 46, and transmits this light attenuation rate to the disaster prevention receiving panel 10 as the degree of contamination, while also performing a process to determine signs of contamination and contamination.

[0054] The stain processing unit 50 calculates the light attenuation rate of the left light-transmitting window 36L by storing the level of the stain detection signal at the time of shipment from the factory when the left light-transmitting window 36L is not stained, at the start of fire monitoring, or at the end of cleaning as a reference level Er. Each time a stain detection signal of a detection level E is obtained from the amplifier unit 46, the light attenuation rate D is calculated as D=1-(E / Er) It is calculated as follows.

[0055] The light attenuation rate D calculated in this manner is a value that varies in proportion to the degree of soiling of the light-transmitting window 36, and in the following description, the light attenuation rate will be described as the degree of soiling.

[0056] In addition, the contamination sign threshold value used by the contamination processing unit 50 to determine contamination signs is set to a predetermined first contamination level, for example a light reduction rate of 75 percent, at which the left side translucent window 36L is slightly contaminated but fire monitoring of the entire monitoring area by the light receiving units 38a, 38b can still be maintained (a fire of a predetermined scale can be detected).

[0057] Furthermore, the contamination threshold used by the contamination processor 50 to determine contamination is set to a second contamination level higher than the first contamination level, for example, a light attenuation rate of 85 percent, at which the light receiver cannot monitor the entire monitoring area.

[0058] The process of the dirt detection unit 50 is similar to that for dirt on the right light-transmitting window 36R.

[0059] [Disaster prevention receiving panel] Fig. 5 is a block diagram showing an outline of the functional configuration of the disaster prevention receiving panel. As shown in Fig. 5, the disaster prevention receiving panel 10 includes a control unit 18, which is a function realized by, for example, executing a program, and includes the functions of a fire monitoring control unit 31 and a damage display control unit 32. The hardware of the control unit 18 uses a computer circuit or the like equipped with a CPU, memory, various input / output ports, etc.

[0060] Transmission units 20a, 20b are provided for the control unit 18, and multiple fire detection devices 16 installed in the up-line tunnel 1a and the down-line tunnel 1b are connected to signal lines 12a, 12b drawn from the transmission units 20a, 20b, respectively.

[0061] In addition, the control unit 18 is provided with an alarm unit 22 equipped with a speaker, alarm indicator lights, etc., a display unit 24 equipped with an LCD display, etc., a printer 25, an operation unit 26 equipped with various switches, etc., and a modem 28 connecting an IG child station equipment that communicates with external monitoring equipment, and further provided with an IO unit 30 connecting a ventilation equipment, an alarm display board equipment, a radio rebroadcasting equipment, a camera monitoring equipment, a lighting equipment, and a fire pump equipment.

[0062] The fire monitoring control unit 31 of the disaster prevention receiving panel 10 repeatedly transmits a call message including a polling command that sequentially specifies the addresses of the fire detection devices 16 via the transmission units 20a, 20b, and when the fire detection device 16 receives a call message that matches its own address, it replies with a response message that includes detection information such as the level of contamination, signs of contamination, and contamination detected immediately before, as well as identification information indicating whether the detection was made on the left or right window.

[0063] In addition, when the fire monitoring control unit 31 of the disaster prevention receiving panel 10 determines that there is a fire by receiving a 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 perform linked control of other equipment.

[0064] [Disaster prevention receiving panel for monitoring contamination] (Collecting and storing information on damage) The contamination display control unit 32 of the disaster prevention receiving panel 10 stores the contamination information 100 of the fire detection device 16 shown in Figure 6 in the memory of the control unit 18 based on the degree of contamination information set in the response message received from the fire detection device 16 and the identification information of whether the left window or right window is detected.

[0065] The contamination information 100 stored in the memory in 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 in Fig. 3 in correspondence with the address of the fire detection device 16. Note that i indicates an arbitrary address of the fire detection device 16.

[0066] Here, assuming that the tunnel lengths of the up line tunnel 1a and the down line tunnel 1b shown in Fig. 1 are each 1 kilometer, 20 fire detection devices 16 are placed at 50 meter intervals, and the dirt information 100 in Fig. 6 shows an example in which left window dirt levels LD01-LD20 and right window dirt levels RD01-RD20 are stored corresponding to addresses 01-20 set for the 20 fire detection devices 16. The left window dirt levels LD01-LD20 and right window dirt levels RD01-RD20 are analog values ​​indicating the light attenuation rates of the light-transmitting windows.

[0067] When a specified operation is performed using the operation unit 26 to check the soiling condition, the soiling display control unit 32 controls the display unit 24 to display a list of the left window soiling levels and right window soiling levels corresponding to the addresses in a specified order based on the soiling information 100 in Figure 6, and also controls the printer 25 to print out the list.

[0068] In addition, the contamination display control unit 32 of the disaster prevention receiving panel 10 controls the display of the left window contamination levels and right window contamination levels corresponding to the addresses based on the contamination information 100 in Figure 6, when the list is displayed on the liquid crystal display of the display unit 24 or printed out by the printer 25, to identify and display the left window contamination levels and right window contamination levels by color coding or the like according to signs of contamination or contamination.

[0069] An embodiment of the display control of the soiling information by the soiling display control unit 32 is as follows.

[0070] (First embodiment of the stain indication) Fig. 7 is an explanatory diagram showing a first embodiment of the stain display. As shown in Fig. 7, the stain display 102 of this embodiment by the stain display control unit 32 of the disaster prevention receiving panel 10 is displayed separately into left window stain information 102 and right window stain information 104 based on the stain information 100 shown in Fig. 6. The display is performed for each of the up line and the down line, but only the up line is shown in the figure.

[0071] The left window soiling information 102 arranges the left window soiling degrees LDi in descending order of soiling degree in correspondence with the addresses Ai of the up line side fire detection devices 16. The right window soiling information 104 arranges the right window soiling degrees RDi in descending order of soiling degree in correspondence with the addresses Ai of the fire detection devices 16.

[0072] As for the left window soiling information 102, the left window soiling degree LD15 at the top address 15 with the highest soiling degree is identified as being in a soiled state as indicated by diagonal lines, since a soiling signal has been received from the corresponding fire detection device 16. As for the left window soiling degrees LD09, LD04, LD12 at addresses 09, 04, 12 with the second to fourth soiling degrees, they are identified as being in a soiling predictive state as indicated by sand, since a soiling predictive signal has been received from the corresponding fire detection device 16.

[0073] As for the right window soiling information 104, the right window soiling degree RD07 at the top address 07 with the highest soiling degree is identified as being in a soiled state as indicated by diagonal lines, since a soiling signal has been received from the corresponding fire detection device 16. Similarly, the left window soiling degrees RD01, RD09 at addresses 01, 09 with the second and third soiling degrees are identified as being in a soiling predictive state as indicated by sand, since a soiling predictive signal has been received from the corresponding fire detection device 16.

[0074] To indicate that the device is in a soiled state or a state that indicates signs of soiling, the background or characters of the corresponding display area are displayed in a predetermined color. For example, a soiled state is indicated in red, and signs of soiling are indicated in yellow.

[0075] By looking at the left window soiling information 102 and right window soiling information 104 arranged in order of the degree of soiling in this way, it can be seen at a glance that the left side light-transmitting window is in high need of cleaning for the fire detection device 16 at address 15, and the right side light-transmitting window is in high need of cleaning for the fire detection device 16 at address 07. In particular, for both windows, the soiled state shown by the diagonal lines, i.e., the light reduction rate has reached 85 percent and it is no longer possible to monitor the entire alert area, so it can be determined that the need for cleaning is even greater.

[0076] On the other hand, the fire detection devices 16 at addresses 09, 04, and 12 for the left-side translucent window and the fire detection devices 16 at addresses 01 and 15 for the right-side translucent window are in a state of pre-soiling soiling, as indicated by the sand, i.e., the light attenuation rate is less than 85 percent but has reached 75 percent, and it can be determined that they are in the next highest need for cleaning.

[0077] (Second embodiment of the stain indication) Fig. 8 is an explanatory diagram showing a second embodiment of the stain display. As shown in Fig. 8, the stain display of this embodiment by the stain display control unit 32 of the disaster prevention receiving panel 10 combines the left window stain degree LDi of the left window stain display 102 shown in Fig. 7 with the right window stain degree RDi of the same fire detection device 16. The display is performed for each of the up line and the down line, but only the up line side is shown.

[0078] Further, the left window soiling degree LDi of the left window soiling display 102 shown in FIG. 7 is displayed in combination with the right window soiling degree RDi of the same fire detection device 16.

[0079] For example, the left window dirt level LD15 of address 15, which has the highest dirt level of the left window dirt display 102, is combined with the right window dirt level RD15 of the same address 15. Here, the left window dirt level LD15 of address 15 is in a dirty state, so it is identified by a diagonal line, and the right window dirt level RD15 of the same address 15 is in a state where dirt is likely to occur, so it is identified by a sandy area.

[0080] In this case, the left window soiling degree LD15 of the address 15 has a light reduction rate of 85 percent and is in a soiled state, and the right window soiling degree RD15 of the address 15 has a light reduction rate of less than 85 percent and has reached 75 percent, which is a sign of impending soiling, and it can be seen at a glance that the fire detection device 16 of the address 15 is in considerable need of cleaning.

[0081] This is similar to the case where the right window soiling indication 104 is used as the base, and the right window soiling level RD07 of address 07, which has the highest soiling level in the right window soiling indication 104, is combined with the left window soiling level LL07 of the same address 07. Here, the right window soiling level RD07 of address 07 is in a soiled state, so it is identified by a diagonal line, and it can be seen at a glance that the left window soiling level LD07 of the same address 07 has a low degree of soiling and is in a normal state. Here too, it can be seen at a glance that the fire detection device 16 of address 15 is in considerable need of cleaning.

[0082] (Third embodiment of stain indication) Fig. 9 is an explanatory diagram showing a third embodiment of the stain display. As shown in Fig. 9, the stain display 106 of this embodiment by the stain display control unit 32 of the disaster prevention receiving panel 10 displays a set of left window stain degree LDi and right window stain degree RDi in the order of the address i of the fire detection device 16. The display is performed for each of the up line and the down line, but only the up line side is shown.

[0083] As in Figures 7 and 8, the degree of contamination in a contaminated state is identifiable and displayed as indicated by diagonal lines, and the degree of contamination that is in a state where contamination is likely to occur is identifiable and displayed as indicated by sand, allowing the progress of contamination to be intuitively grasped without having to look at the analog value of the contamination degree.

[0084] Here, the identification display of the soiled state and the soiling sign state is performed for the left window soiling degree LDi and right window soiling degree RDi, which are in the soiled or soiling sign state, but the identification display of the soiled state or the soiling sign state is also performed for the corresponding address i. For example, in the case of address 15, where the left window soiling degree LD15 is in the soiled state and the right window soiling degree RD15 is in the soiling sign state, the identification display of the soiling state for the higher soiling degree LD15 is given priority.

[0085] This type of soiling display 106 simply reads out and displays the soiling information 100 stored in the memory shown in FIG. 6, and distinguishes between a soiled state and a state that indicates signs of soiling. Based on the arrangement of the fire detection devices 16 in the tunnel, the degree of soiling of the translucent windows on the left and right of each fire detection device 16 can be grasped, and the need for cleaning can be determined.

[0086] (Fourth embodiment of the stain indication) Fig. 10 is an explanatory diagram showing a fourth embodiment of the stain display. As shown in Fig. 10, the stain display 108 of this embodiment by the stain display control unit 32 of the disaster prevention receiving panel 10 displays the left window stain degree LDi and the right window stain degree RDi in descending order of stain degree, and the address of the stain display 108 displays the address iL or iR which is a combination of 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 of the up line and the down line, but only the up line side is shown in the figure.

[0087] In this example, the left window at address 15L has the highest degree of soiling LD15, followed by the right window at address 07R with a degree of soiling RD07. Both windows are marked with diagonal lines indicating a soiled state, but it can be determined that the fire detection device 16 at address 15 is in greater need of cleaning.

[0088] (Fifth embodiment of stain indication) Fig. 11 is an explanatory diagram showing a fifth embodiment of the soiling display. As shown in Fig. 11, the soiling display control unit 32 of the disaster prevention receiving panel 10 controls the soiling display 110 of this embodiment to display in the order of address i so that the left window soiling degree LDi of the i-th fire detection device 16 and the right window soiling degree RLi+1 of the i+1-th fire detection device 16, which overlappingly monitor the same monitoring area ARi, are adjacent to each other. The display is performed for each of the up line and the down line, but only the up line is shown.

[0089] For example, the fire detection device 16 at address 01 and the fire detection device 16 at address 02 are overlappingly monitoring the same monitoring area AR12, so they are arranged so that the right window soiling degree RD01 at address 01 and the left window soiling degree LD2 at address 02 are adjacent to each other. This relationship is also the same for other fire detection devices 16 that are adjacent and overlappingly monitoring the same monitoring area.

[0090] As in Figures 7 and 8, the degree of contamination in a contaminated state is displayed as indicated by diagonal lines, and the degree of contamination that is in a state where contamination is likely to occur is displayed as indicated by sand, making it possible to grasp the degree of contamination at a glance without having to look at the analog value of the contamination degree.

[0091] Such a soiling display 110 makes it possible to easily and reliably see the relationship between the soiling degree of one light-transmitting window (fire detection section) and the soiling degree of the other light-transmitting window for the same monitoring area that is redundantly monitored by two adjacent fire detection devices 16. For example, the soiling degree RD07 of the right window of address 07 is in a soiled state as indicated by the diagonal lines, but the soiling degree RD08 of the right window of address 08, which is redundantly monitoring the same monitoring area AR08, is at a normal level, making it possible to determine at a glance that cleaning is not urgently needed.

[0092] In this regard, even in the case of address 15, where the left window soiling degree LD15 has reached a soiled state, the left window soiling degree LD16 of address 14, which is overlappingly monitoring the same monitoring area AR15, is at a normal level, and similarly, it is easily possible to determine that there is no urgent need for cleaning.

[0093] The contamination display 120 in FIG. 12 shows an embodiment in which the contamination information 100 is displayed in the order of the addresses of the fire detection devices 16 with the longitudinal direction of the tunnel as the horizontal direction.

[0094] A contamination display 130 in FIG. 13 shows an embodiment in which contamination information 100 is displayed in the order of addresses of the fire detection devices 16 corresponding to monitored areas AR1, AR2, . . . in a tunnel.

[0095] When the stain indications 110, 120, and 130 in Figs. 11 to 13 are displayed on a liquid crystal display, if they do not fit on one screen, a display method such as switching display or scrolling display will be used.

[0096] (Sixth embodiment of stain indication) As a sixth embodiment of the damage display by the damage display control unit 32 provided in the disaster prevention receiving panel 10, the damage displays according to the first to fifth embodiments shown in Figures 7 to 13 may be selected and displayed as necessary by a specified operation of the operation unit 26.

[0097] [Modifications of the present invention] (Fire detection device) The above embodiment is an example of a two-wavelength type fire detection device, but the present invention is not limited to this and other types may be used. For example, in addition to the above-mentioned two wavelengths, a three-wavelength type flame detector may be used that detects radiation energy in a wavelength band around 3.8 μm, which is on the short wavelength side of the 4.4 to 4.5 μm band that is the resonance radiation band of CO2, in a similar manner to the two-wavelength type, and determines the presence or absence of a flame based on the relative ratio of each received light signal in these three wavelength bands.

[0098] (Detection of signs of contamination and actual contamination) In the above embodiment, the fire detection device detects the pre-warning state and the forecast state and transmits them to the disaster prevention receiving panel, but this is not limiting. For example, since the left window soiling degree and the right window soiling degree of the fire detection device are collected and stored in the disaster prevention receiving panel, the soiling display control unit of the disaster prevention receiving panel may distinguish and display the soiling pre-warning state on the left window soiling degree or the right window soiling degree when the left window soiling degree or the right window soiling degree reaches a predetermined soiling pre-warning threshold, and may distinguish and display the soiling state on the left window soiling degree or the right window soiling degree when the left window soiling degree or the right window soiling degree reaches a predetermined soiling threshold higher than the soiling pre-warning threshold. This makes it possible to reduce the processing load on the fire detection device side.

[0099] The left and right windows may be a single light-transmitting window curved to cover, for example, the left light-receiving unit and the right light-receiving unit. In this case, the part corresponding to the front of the sensor of the left fire detection unit (light-receiving unit) corresponds to the left light-transmitting window in this embodiment, and the part corresponding to the front of the sensor of the right fire detection unit (light-receiving unit) corresponds to the right light-transmitting window.

[0100] (Display of degree of damage) In the above embodiment, the contamination display control unit of the disaster prevention receiving panel displays the contamination degree of the left window and the contamination degree of the right window as analog values ​​(light reduction rates) of the contamination degree, but is not limited to this. For example, the contamination degree may be displayed by characters, symbols, figures, or colors that indicate the degree of contamination in multiple stages. By displaying the degree of contamination in multiple stages in this way by characters, symbols, figures, or colors, the degree of contamination can be intuitively grasped and the need for cleaning can be determined.

[0101] In addition, in each embodiment of the soiling indication shown in Figures 7 to 13, the numerical indication of the soiling degree is not essential and may be omitted. Even if the numerical indication of the soiling degree is omitted, the urgency and priority of cleaning can be easily and efficiently grasped, and the object of the present invention can be achieved.

[0102] In each of the embodiments of the soiling display shown in FIG. 7 to FIG. 13, the soiling degree or the degree of the soiling degree may be displayed in the order of the monitoring areas with the highest cleaning urgency.

[0103] (Other) Surveillance Areas Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values ​​shown in the above embodiment. [Explanation of symbols]

[0104] 1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiving panel 12a, 12b: signal line 16: Fire detection device 16L: Left window fire detector 16R: Right window fire detection unit 18,34: Control section 20a, 20b, 35: Transmission section 31: Fire monitoring and control unit 32: Defacement display control unit 36L:Left side translucent window 36R: Right side translucent window 38a, 38b: Light receiving part 40a, 40b: Amplification processing section 42: Test light source section 44: Dirty receiver 46: Amplification section 48:Fire judgment department 50: Defacement treatment section

Claims

[Claim 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, a pair of 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 are displayed on the display unit in the order of arrangement of the plurality of fire detection devices, so that 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 corresponding to the same monitoring area that are respectively arranged on the adjacent boundaries and overlappingly monitored are arranged side by side, A disaster prevention system characterized in that, for the first window soiling degree and the second window soiling degree, a normal state is identifiable and displayed when the soiling degree does not reach a predetermined soiling sign threshold, a soiling sign state is identifiable and displayed when the soiling degree reaches the soiling sign threshold, and a soiled state is identifiable and displayed when the soiling degree reaches a predetermined soiling threshold which is higher than the soiling sign threshold.

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