Tunnel disaster prevention system

Abstract

To provide a tunnel disaster prevention system capable of preventing an unmonitored area in a tunnel from being generated without requiring a person in charge of maintenance to rush to the site to perform maintenance work even when one detector fails.SOLUTION: A tunnel disaster prevention system includes: a plurality of detectors 5 that can switch a monitoring area and are installed at predetermined intervals in a tunnel 3; and a disaster prevention receiving board 7 for enlarging, when a predetermined detector 5C of the plurality of detectors 5 fails, the monitoring areas of detectors 5B, 5D installed next to the failed detector 5C.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to Tunnel disaster prevention system In particular, the present invention relates to a method for detecting fires and the like in a tunnel using a plurality of detectors. [Background technology]

[0002] Conventional tunnel disaster prevention systems installed in tunnels employ a method of installing multiple detectors so that no unmonitored areas are created in the tunnel, or a method of double monitoring with detectors so that no unmonitored areas are created even if one of the multiple detectors fails. Here, for example, Patent Document 1 and Patent Document 2 are listed as documents related to the conventional technology. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-314376 [Patent Document 2] JP 2018-147373 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, in cases where a system has been adopted in which multiple detectors are installed to ensure that no areas are left unmonitored within a tunnel, if a detector malfunctions, a maintenance worker will rush to the site, enter the tunnel, and carry out work to repair the malfunction (for example, replacing the detector).

[0005] Furthermore, even if a system of double monitoring using detectors is adopted, if a detector malfunctions (failures) occur, even if there are no unmonitored areas within the tunnel, tunnel management regulations, etc. require that maintenance personnel rush to the site, enter the tunnel, and carry out work to restore the malfunction.

[0006] In any case, the conventional method has the problem that if a detector fails, a maintenance worker must immediately enter the tunnel and perform maintenance work such as replacing the failed detector.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a tunnel disaster prevention system in which a plurality of detectors are installed inside a tunnel, and in which, even if one of the plurality of detectors fails, it is possible to prevent unmonitored areas within a tunnel from occurring without the need for a maintenance technician to rush to the site to perform maintenance work. [Means for solving the problem]

[0008] The first invention is The tunnel comprises a plurality of detectors capable of switching monitoring areas and installed at a predetermined interval in the longitudinal direction within the tunnel; and a disaster prevention receiving panel that, when a predetermined detector among the plurality of detectors fails, expands the monitoring area of ​​a detector installed next to the failed detector, the monitoring areas of the detectors are configured to be formed on both sides of the detector, and the monitoring area of ​​the detector is switchable between a first monitoring area and a second monitoring area having a length twice that of the first monitoring area in the longitudinal direction, and the value of the predetermined interval in the plurality of detectors is equal to the length of the first monitoring area or the length of the second monitoring area. When a specific detector among the plurality of detectors fails, the monitoring area is expanded by switching the monitoring area of ​​the detector installed next to the failed detector from the first monitoring area to the second monitoring area, and in order to avoid the risk of the detector malfunctioning due to sunlight entering the tunnel from the tunnel entrance, the function of one of the monitoring areas on both sides of the detector installed at the tunnel entrance among the plurality of detectors is deleted, and the monitoring area of ​​the detector installed at the tunnel entrance is installed only in the inside direction of the tunnel. It is a tunnel disaster prevention system.

[0010] The second invention is The tunnel monitoring system includes a plurality of detectors that are installed in a tunnel at a predetermined interval in a longitudinal direction and that are capable of switching a monitoring area, and a disaster prevention receiving panel that expands the monitoring area of ​​a detector installed adjacent to a predetermined detector of the plurality of detectors when the predetermined detector of the plurality of detectors fails, the monitoring area of ​​the detector is configured to be formed on both sides of the detector, and the monitoring area of ​​the detector is switchable between a first monitoring area and a second monitoring area having a length twice as long as the first monitoring area in the longitudinal direction, the value of the predetermined interval in the plurality of detectors is equal to the value of the length of the first monitoring area or equal to the value of the length of the second monitoring area, and the expansion of the monitoring area when the predetermined detector of the plurality of detectors fails is achieved by switching the monitoring area of ​​the detector installed adjacent to the failed detector from the first monitoring area to the second monitoring area, and the tunnel includes a plurality of detectors that are configured to be ... a plurality of compartments are set in the longitudinal direction of the tunnel, and a fire extinguishing system having a plurality of compartment fire extinguishing units that discharge a fire extinguishing agent is provided for each of the plurality of compartments, the fire extinguishing system being composed of a water spray fire extinguishing system that sprays water as the fire extinguishing agent in a mist form from a water spray head or a foam spray fire extinguishing system that sprays air foam as the fire extinguishing agent from a foam head, the detectors are installed in the center of each of the plurality of compartments, the length of the first monitoring area in the longitudinal direction of the tunnel is equal to the length of the compartment in the longitudinal direction of the tunnel, and in order to avoid the risk of the detector malfunctioning due to sunlight entering the tunnel from the tunnel entrance, the function of one of the monitoring areas on both sides of the detector installed at the tunnel entrance among the plurality of detectors is deleted, and the monitoring area of ​​the detector installed at the tunnel entrance is installed only in the inside direction of the tunnel. It is a tunnel disaster prevention system.

[0011] The third invention is A tunnel disaster prevention system according to a second invention, which is configured to spray water spray or air bubbles not only to the compartment in which the compartment fire extinguishing unit is installed, but also to an adjacent compartment adjacent to the compartment in which the compartment fire extinguishing unit is installed. It is a tunnel disaster prevention system.

[0013] The fourth invention is the first Third The tunnel disaster prevention system according to any one of the above, wherein the detector comprises a light receiving unit, a test light emitting unit, and a memory, and whether or not a malfunction has occurred in the detector is determined by storing the intensity of light received by the light receiving unit when the test light emitting unit emits light in each of a plurality of addresses in the memory, and after this storage, comparing the intensities of light stored in each of the addresses.

[0014] Fifth invention is the first No.4. A tunnel disaster prevention system according to any one of claims 1 to 4, wherein the detector is equipped with a voltage monitoring unit that monitors the voltage of the power supply supplied to the detector, and whether or not a malfunction has occurred in the detector is determined by detecting whether or not the voltage detected by the voltage monitoring unit is outside an allowable range. Effect of the Invention

[0015] According to the present invention, even if one of a plurality of detectors fails, it is possible to prevent unmonitored areas within a tunnel from occurring without requiring a maintenance technician to rush to the site to perform maintenance work. [Brief description of the drawings]

[0016] [Figure 1] 1 is a diagram showing a schematic configuration of a tunnel disaster prevention system (a tunnel disaster prevention system installed in a tunnel) according to an embodiment of the present invention. [Diagram 2] 1A and 1B are diagrams showing the outer shape of a detector of a tunnel disaster prevention system according to an embodiment of the present invention, and FIG. 1B is a view taken along the arrow IIB in FIG. [Diagram 3] 1 is a block diagram showing a schematic configuration of a detector of a tunnel disaster prevention system according to an embodiment of the present invention. [Figure 4] 1 is a block diagram showing a schematic configuration of a disaster prevention receiving panel of a tunnel disaster prevention system according to an embodiment of the present invention and a detector installed in the disaster prevention receiving panel. [Diagram 5] FIG. 2 is a diagram showing a monitoring area of ​​a detector of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 6] 1 is a diagram illustrating the emission of water spray or air bubbles by the fire extinguishing equipment of the tunnel disaster prevention system according to an embodiment of the present invention. FIG. [Figure 7] FIG. 6 is a diagram showing the monitoring areas of the detectors in the embodiment shown in FIG. 5 when one detector fails. [Figure 8] 4 is a flowchart showing operations such as switching of a monitoring area by a detector of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 9] 4 is a flowchart showing operations such as fault detection in a detector of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 10] 4 is a flowchart showing the operation of a disaster prevention receiving panel of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 11] 4 is a flowchart showing the operation of a disaster prevention receiving panel of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 12] 4 is a flowchart showing the operation of a disaster prevention receiving panel of the tunnel disaster prevention system according to the embodiment of the present invention. [Figure 13] FIG. 2 is a diagram showing a schematic configuration of a tunnel disaster prevention system according to a first modified example. [Figure 14] FIG. 11 is a diagram showing a schematic configuration of a tunnel disaster prevention system according to a second modified example. [Figure 15] FIG. 13 is a diagram showing a schematic configuration of a tunnel disaster prevention system according to a third modified example. [Figure 16] FIG. 16 is a diagram showing the monitoring areas of the detectors in the embodiment shown in FIG. 15 when one detector fails. [Figure 17] FIG. 13 is a diagram showing a schematic configuration of a tunnel disaster prevention system according to a fourth modified example. [Figure 18] FIG. 18 is a diagram showing the areas monitored by the detectors in the embodiment shown in FIG. 17 when one detector fails. [Figure 19] FIG. 8 corresponds to FIG. 5 and FIG. 7, and shows a schematic configuration of a tunnel disaster prevention system at a tunnel entrance. [Figure 20] FIG. 8 corresponds to FIG. 5 and FIG. 7, and shows a schematic configuration of another tunnel disaster prevention system at the entrance of a tunnel. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A tunnel disaster prevention system (e.g., a road tunnel disaster prevention system) 1 according to an embodiment of the present invention is installed and used in a tunnel 3, as shown in Figure 1 etc., and is equipped with a plurality of detectors (fire detectors) 5 (5A, 5B, 5C, 5D, 5E, etc.) and a disaster prevention receiving panel 7.

[0018] Detectors 5 can switch monitoring areas (monitoring range; detection area) (see arrow A1 in Fig. 5 and Fig. 7, etc.), and are installed in tunnel 3 at predetermined intervals (for example, constant intervals) in the longitudinal direction of tunnel 3 so that no unmonitored areas are formed in tunnel 3 (so that all areas in tunnel 3 can be monitored). In the monitoring area, detector 5 detects whether or not there are any high temperature spots such as fires.

[0019] Even when a specific detector (e.g., a specific detector 5C) among the multiple detectors 5 (5A, 5B, 5C, 5D, 5E, etc.) fails, the disaster prevention receiving panel 7 expands the monitoring area of, for example, a pair of detectors 5B and 5D (switches the monitoring area so that the monitoring area becomes wider) as shown by arrows B2w and D1w in Fig. 7 to prevent an unmonitored area from being formed within the tunnel 3. The detectors 5B and 5D are detectors installed on both sides of the failed detector 5C.

[0020] To explain further, when all detectors 5 are operating normally, as shown in FIG. 5, detector 5A monitors the range indicated by arrows A1 and A2, detector 5B monitors the range indicated by arrows B1 and B2, detector 5C monitors the range indicated by arrows C1 and C2, detector 5D monitors the range indicated by arrows D1 and D2, and detector 5E monitors the range indicated by arrows E1 and E2.

[0021] On the other hand, when detector 5C fails, detector 5B widens the monitoring area on the detector 5C side, and detector 5D widens the monitoring area on the detector 5C side, as shown in Fig. 7. Detector 5A monitors the range indicated by arrows A1 and A2, detector 5B monitors the range indicated by arrows B1 and B2w, detector 5D monitors the range indicated by arrows D1w and D2, and detector 5E monitors the range indicated by arrows E1 and E2.

[0022] Each of the multiple detectors 5 transmits a failure occurrence signal (a signal notifying the occurrence of a failure; an alarm signal) to the disaster prevention receiving panel 7 when a failure occurs. The disaster prevention receiving panel 7 also monitors whether a failure occurrence signal is sent from each of the multiple detectors 5, and when it receives a failure occurrence signal sent from a specific detector 5C, it transmits a monitoring area switching signal (a signal instructing the switching of the monitoring area) to detectors 5B and 5D installed next to the detector 5C where the failure occurred, and commands the switching of the monitoring area. Each of the multiple detectors 5 monitors whether a monitoring area switching signal is sent from the disaster prevention receiving panel 7, and widens the monitoring area when it receives a monitoring distance switching signal.

[0023] The monitoring area of ​​detector 5 is formed on both sides of detector 5 (on one side and the other side in the longitudinal direction of tunnel 3 when installed in tunnel 3), as shown by arrows in Figures 5 and 7.

[0024] The monitoring area of ​​the detector 5 can be switched between, for example, a first monitoring area (see arrows B1, B2, C1, C2, D1, D2, etc. in FIG. 5) and a second monitoring area (see arrows B2w, D1w in FIG. 7) that is twice as long (distance) as the first monitoring area. The value of the predetermined interval in the multiple detectors 5 (5A, 5B, 5C, 5D, 5E, etc.) is equal to the length of the first monitoring area.

[0025] As already understood, when no failure occurs in any of the detectors 5 and all the detectors 5 are operating normally, each detector 5 performs monitoring in a first monitoring area, and when a failure occurs in one detector 5C, the detectors 5B and 5D installed next to the failed detector 5C perform monitoring in a second monitoring area on the side of the failed detector 5B.

[0026] 7, the detectors 5B and 5D monitor only the side of the failed detector 5C using the second monitoring area, but the detectors 5B and 5D may monitor both sides using the second monitoring area. That is, the detector 5B may monitor the detector 5C side and the detector 5A side using the second monitoring area, and the detector 5D may monitor the detector 5C side and the detector 5E side using the second monitoring area.

[0027] As shown in Figures 15, 16, 17 and 18, the value of the predetermined interval between the multiple detectors 5 (5A, 5C, 5E, etc.) may be equal to the length of the second monitoring area.

[0028] Then, when all of the detectors 5 (5A, 5C, 5E, etc.) are operating normally, as shown in Figures 15 and 17, the range indicated by arrows A1 and A2 may be monitored by detector 5A, the range indicated by arrows C1 and C2 may be monitored by detector 5C, and the range indicated by arrows E1 and E2 may be monitored by detector 5E.

[0029] On the other hand, when detector 5C fails, the monitoring area of ​​detector 5A on the detector 5C side may be widened, and the monitoring area of ​​detector 5E on the detector 5C side may be widened, as shown in Figures 16 and 18. Then, detector 5A may monitor the range indicated by arrows A1 and A2w, and detector 5E may monitor the range indicated by arrows E1w and E2.

[0030] Here, the tunnel 3 and the monitoring area of ​​the detector 5 will be described in more detail.

[0031] The cross-sectional shape of tunnel 3 (the shape of a cross section taken along a plane perpendicular to the longitudinal direction) is a substantially constant shape, such as a semicircular shape. Furthermore, the longitudinal dimension of tunnel 3 (the left-right direction in FIG. 1, etc.) is considerably larger than the cross-sectional height and width. Naturally, vehicles traveling within tunnel 3 travel along the longitudinal direction of tunnel 3.

[0032] Since the longitudinal dimension of tunnel 3 is significantly larger than the cross-sectional height and width, the monitoring area of ​​detector 5 can be considered one-dimensional, and the monitoring area of ​​detector 5 and the monitoring distance of detector 5 can be considered synonymous.

[0033] 1 etc., the multiple detectors 5 are installed in the tunnel 3 at regular intervals (e.g., 25 m intervals) in the longitudinal direction of the tunnel 3. Each detector 5 installed in the tunnel 3 has a monitoring area of ​​a first monitoring distance (e.g., 25 m, which is the same as the installation interval value) on both sides of the detector 5 (one side and the other side in the longitudinal direction of the tunnel).

[0034] When all the detectors 5 are operating normally without any malfunctions, as shown in Fig. 5, each detector 5 has a monitoring distance of 25 m on one side of the longitudinal direction of the tunnel 3 and also has a monitoring distance of 25 m on the other side of the longitudinal direction of the tunnel 3. This allows for double monitoring of the occurrence of fires, etc. within the tunnel 3. In other words, the area between two adjacent detectors 5 is monitored by one of the two detectors 5 and the other detector.

[0035] On the other hand, when a failure occurs in one of the detectors 5, detector 5C, the monitoring distance of one detector 5B present on one side of the failed detector 5C is changed from 25m to 50m, and the monitoring distance of one detector 5D present on the other side of the failed detector 5C is switched from 25m to 50m, as shown in Fig. 7. This allows for double monitoring of fires and other events in the tunnel 3, even in the area where the failed detector 5C is located.

[0036] Incidentally, detectors 5 whose monitoring distance can be switched to either 25 m or 50 m as described above may be installed inside tunnel 3 at intervals of 50 m, as shown in Figures 15, 16, 17, and 18 described above.

[0037] When all the detectors 5 are not broken down and are operating normally, the monitoring distance of each of the detectors 5 may be set to 25 m (see Figs. 15 and 17).

[0038] On the other hand, when a malfunction occurs in one of the detectors 5, detector 5C, the monitoring distance (monitoring distance on the detector 5C side) of one detector 5A located on one side of the detector 5C where the malfunction has occurred may be changed from 25 m to 50 m, and the monitoring distance (monitoring distance on the detector 5C side) of one detector 5E located on the other side of the detector 5C where the malfunction has occurred may be switched from 25 m to 50 m (see Figures 16 and 18).

[0039] Here, the detector 5 will be described in detail.

[0040] 3, the detector 5 is configured with a light receiving unit (fire detection unit) 9, a test light emitting unit 11 that emits test light (for example, infrared light) that resembles the flames and heat of a fire, a memory (EEPROM) 13, and a control unit (fire detector control unit configured with a CPU, not shown) 15. The light receiving unit 9 also detects the flames and heat of an actual fire.

[0041] Two fire detection units 9 are provided: a left fire detection unit 9A and a right fire detection unit 9B. When the detector 5 is installed in the tunnel 3, the left fire detection unit 9A detects the occurrence of a fire or the like to the left of the detector 5 shown in FIG. 5 etc., and when the detector 5 is installed in the tunnel 3, the right fire detection unit 9A detects the occurrence of a fire or the like to the right of the detector 5 shown in FIG. 5 etc.

[0042] The fire detection unit 9 is configured to include a first sensor (sensor A) 17, a second sensor (sensor B) 19, a signal amplifier 21 (21A, 21B), and an amplification factor switching unit 23. The first sensor 17 detects light of a predetermined wavelength (for example, infrared light of a first wavelength), and the second sensor 19 detects light of a predetermined wavelength (for example, infrared light of a second wavelength different from the first wavelength).

[0043] The signal amplifier 21A amplifies the signal output from the first sensor 17, and the signal amplifier 21B amplifies the signal output from the second sensor 19. The amplification factor switching unit 23 changes the amplification factor of the signal in the signal amplifier 21 (21A, 21B). The amplification factor switching unit 23 changes the amplification factor of the signal in the signal amplifier 21 (21A, 21B), so that the monitoring area of ​​the detector 5 can be changed.

[0044] The test light emitting unit 11 is configured to include a check lamp driving unit 25 and check lamps 27 (27A, 27B). The check lamp 27A is configured to emit light (e.g., infrared light) toward the sensors 17, 19 of the fire detection unit 9A that can be detected by the sensors 17, 19. The check lamp 27B is configured to emit light toward the sensors 17, 19 of the fire detection unit 9B that can be detected by the sensors 17, 19.

[0045] 2, the detector 5 includes a housing 33 in which the through holes 29, 31 are provided, and although not shown in FIG 2, the test light emitter 11 (check lamp 27) and the light receiver 9 (sensors 17, 19) are provided within the housing 33. The through holes 29, 31 are closed with a member 35 such as glass through which the light emitted by the check lamp 27 passes.

[0046] The infrared rays emitted by the test light-emitting unit 11 are then transmitted through member 35 and received by the light-receiving unit 9. When the detector 5 is installed inside the tunnel 3, member 35 gradually becomes dirty. As a result, the intensity of the infrared rays received by the light-receiving unit 9 when the test light-emitting unit 11 emits infrared rays gradually weakens over time, but the intensity of the light received by the light-receiving unit 9 can be restored by periodically cleaning member 35.

[0047] 3, the detector 5 is provided with both a serial type transmission unit 41 and a parallel type I / O unit 43 in addition to the power supply unit 37 and the voltage monitoring unit 39. The serial type transmission unit 41 is used when signals are exchanged between the detector 5 and the disaster prevention receiving panel 7 in a serial type using a transmission method, and the parallel type I / O unit 43 is used when signals are exchanged between the detector 5 and the disaster prevention receiving panel 7 in a direct method (voltage or non-voltage contact signal).

[0048] The power supply unit 37 supplies power to the detector 5 , and the voltage monitoring unit 39 monitors the voltage of the power supply supplied to the detector 5 and the voltages of the multiple power supply systems converted by the power supply unit 37 .

[0049] The fire detector control unit 15 is configured to include a fire judgment processing unit 45, a voltage monitoring processing unit 47, a monitoring range switching processing unit 49, and a check lamp test processing unit 51.

[0050] The fire judgment processing unit 45 judges whether or not a fire has occurred in the monitoring area of ​​the detector 5 based on the signal sent from the fire detection unit 9 (signal amplification unit 21), and when it determines that a fire has occurred, it sends a signal to the disaster prevention receiving panel 7 to notify that a fire has occurred.

[0051] The voltage monitoring processing unit 47 judges whether the voltage of the power supply unit 37 is normal or not based on the signal sent from the voltage monitoring unit 39, and if it judges that the voltage of the power supply unit 37 is abnormal, it sends a signal to the disaster prevention receiving panel 7 indicating that the voltage is abnormal.

[0052] The monitoring range switching unit processing unit 49 switches the monitoring area of ​​the detector 5 based on the signal sent from the disaster prevention receiving panel 7. This switching is performed by changing the amplification factor in the amplification factor switching unit 23, as described above.

[0053] The check lamp test processing unit 51 turns on the check lamp 27 based on a signal sent at a predetermined time interval from the disaster prevention receiving panel 7. The check lamp test processing unit 51 also determines whether or not a malfunction has occurred in the detector 5.

[0054] This determination is made by storing (memorizing) the intensity of light (quantified light intensity) received by the light receiving unit 9 (sensors 17, 19) when the test light emitting unit 11 (check lamp 27) emits light (for example, infrared light) in each of a plurality of addresses (not shown) of the EEPROM 13, and then comparing the light intensities stored in each address. When it is determined that a malfunction has occurred in the detector 5, the check lamp test processing unit 51 sends a signal to the disaster prevention receiving panel 7 to that effect.

[0055] The determination of a malfunction in the detector 5 (check lamp test processing unit 51) will be further described.

[0056] When the test light emitter 11 (check lamp 27A) emits light, the intensity of the light received by the light receiver 9A is stored in each of two addresses (first address, second address) of the EEPROM 13. After this storage, the numerical values ​​indicating the light intensity stored in the two addresses are compared. If the two numerical values ​​match, it is determined that no malfunction has occurred in the detector 5 (fault in the memory 13). On the other hand, if the numerical values ​​indicating the light intensity stored in the two addresses differ from each other, it is determined that a malfunction has occurred in the detector 5 (memory fault). This malfunction determination in the detector 5 is performed in the same way for the check lamp 27B and the light receiver 9B.

[0057] As described above, the infrared rays emitted by the test light-emitting unit 11 are transmitted through the member 35 and received by the light-receiving unit 9. Therefore, when the detector 5 is installed inside the tunnel 3, the member 35 provided in the through-holes 29, 31 of the housing 33 of the detector 4 gradually becomes dirty, and the intensity of the infrared rays received by the light-receiving unit 9 gradually weakens over time. In other words, the transmittance of the infrared rays through the member 35 gradually deteriorates (the degree of contamination gradually increases).

[0058] Therefore, when the contamination rate exceeds a predetermined threshold, the check lamp test processing unit 51 sends a signal to the disaster prevention receiving panel 7 to the effect that the contamination rate exceeds the predetermined threshold (outputs a contamination alarm). The numerical values ​​indicating the light intensity stored in each of the two addresses of the EEPROM 13 (the numerical values ​​when no failure occurs) can also be understood as the contamination rate.

[0059] Next, the disaster prevention receiving panel 7 will be described in detail with reference to FIG.

[0060] The disaster prevention receiving panel 7 is composed of a main control unit (main control unit configured with a CPU and memory not shown) 53, a display unit 55 configured for example with an LCD, an operation unit 57 configured for example with a touch panel, an I / O unit 59 used for connecting devices other than the detector 5, a transmission unit 61 used for connecting an information communication unit such as the Internet, and a transmission unit 63 used for connecting the detector 5.

[0061] The transmission unit 63 is used for connection to the transmission unit 41 of the serial type detector 5, and is used for sending and receiving signals with the serial type detector 5. A transmission unit 64 may be provided instead of or in addition to the transmission unit 63. The transmission unit 64 is used for connection to the I / O unit of the parallel type detector 5 via an I / O controller (signal converter).

[0062] In the tunnel disaster prevention system 1, when the voltage detected by the voltage monitoring unit 39 of the detector 5 is not within the allowable range (if it is outside the allowable range), the detector 5 that detected the voltage outside the allowable range is determined to have failed. Then, the disaster prevention receiving panel 7 switches the monitoring area of ​​the detector 5 installed next to the failed detector 5 as described above.

[0063] Furthermore, in the tunnel disaster prevention system 1, if the numerical values ​​indicating the light intensities stored in two addresses of the EEPROM 13 are different from each other, it is determined that the detector 5 having the different numerical values ​​indicating the light intensities has failed. Then, the disaster prevention receiving panel 7 switches the monitoring area of ​​the detector 5 installed next to the failed detector 5 as described above.

[0064] As shown in Fig. 1, inside the tunnel 3, a plurality of sections 65 (65A, 65B, 65C, 65D, 65E, 65F, etc.) are set, each sectioned at 25 m in the longitudinal direction (left-right direction in Fig. 1) of the tunnel 3. The sections 65 are continuously connected in the longitudinal direction of the tunnel 3.

[0065] The tunnel disaster prevention system 1 is provided with a fire extinguishing system 67. The fire extinguishing system (water spray fire extinguishing system or foam spray fire extinguishing system) 67 includes an automatic water spray valve device or an automatic air foam valve device, a pump, a valve, and fire extinguishing equipment devices 69 such as piping and joints connecting these, a plurality of compartment fire extinguishing units 71 (71A, 71B, 71C, 71D, 71E, 71F, etc.) that spray water spray or air foam as a fire extinguishing agent for each of the plurality of compartments 65, and a switching valve 75. The air foam is a foam extinguishing system that is sprayed from a foam head, a foam nozzle, etc., and covers the surface of a flammable liquid with foam, and extinguishes the fire by two actions: a suffocating action caused by the covering of a collection of fine bubbles and a cooling action caused by the moisture contained in the bubbles.

[0066] The compartment fire extinguishing section 71 is configured with a plurality of water spray heads or foam heads 77 arranged at predetermined intervals in the longitudinal direction of the tunnel 3. In addition, the fire extinguishing equipment 69 and each switching valve 75 are connected to the disaster prevention receiving panel 7 via the I / O unit 59 of the disaster prevention receiving panel 7.

[0067] Each of the multiple detectors 5 (5A, 5B, 5C, 5D, 5E, etc.) is installed in the center of each section 65 in the longitudinal direction of the tunnel 3, as shown in Figures 1, 5, 6, and 7.

[0068] As shown in Figure 6, for example, when a fire occurs in the second compartment 65B located between detectors 5B and 5C (when a fire point 79 is generated), under the control of the main control unit 53, the switching valve 75 of the compartment fire extinguishing unit 71B and the switching valve 75 of the compartment fire extinguishing unit 71C are opened, and water spray or air bubbles are sprayed from the water spray or foam head 77 of the compartment fire extinguishing unit 71B and the water spray or foam head 77 of the compartment fire extinguishing unit 71C onto the second compartment 65B and the third compartment 65C.

[0069] 17 and 18, a plurality of compartments 65 (65A, 65C, 65E,...) are set at 50 m intervals in the longitudinal direction of tunnel 3. A plurality of compartment fire extinguishing units 71 (71A, 71C, 71E,...) are provided for each compartment 65.

[0070] Next, the operation of the tunnel disaster prevention system 1 will be described.

[0071] First, the operation of the detector 5, such as switching of the monitoring area, will be described with reference to Fig. 8. The operation shown in Fig. 8 is performed by each of the multiple detectors 5, for example, in parallel with each other.

[0072] The detector 5 performs an initialization process including setting an amplification factor according to the monitoring area (S1). At this time, the monitoring area is set to 25 m on one side of the longitudinal direction of the tunnel 3, and is also set to 25 m on the other side of the longitudinal direction of the tunnel 3.

[0073] Next, a fire determination process is performed (S3). That is, the fire determination processing unit 45 determines whether or not a fire has occurred in the monitoring area of ​​the detector 5. Also, a voltage monitoring process is performed (S5). That is, the voltage monitoring unit 39 determines whether or not the voltage of the power supply unit 37 is normal.

[0074] Next, it is determined whether or not a signal for switching to a monitoring range different from the current monitoring range has been input from the disaster prevention receiving panel 7 (S7).

[0075] In step S7, if there is no input of a signal to switch to a monitoring range different from the current monitoring range (a signal to widen the monitoring range or a signal to narrow the monitoring range), the process returns to step S3 and a fire determination process is performed.

[0076] In step S7, if a signal to switch to a monitoring range different from the current monitoring range (monitoring range switching signal) is input, the setting of the amplification factor switching unit 23 is changed to switch the monitoring distance from 50 m to 25 m, or the monitoring distance is switched from 25 m to 50 m, and a switching response signal is output to the disaster prevention receiving panel 7 (S13).

[0077] Next, the operation of the detector 5, such as failure detection, will be described with reference to Fig. 9. The operation shown in Fig. 9 is also performed by each of the multiple detectors 5, for example, in parallel with each other.

[0078] The detector 5 performs an initialization process including setting an amplification factor according to the monitoring area (S21). At this time, the monitoring area is set to 25 m on one side of the longitudinal direction of the tunnel 3, and is also set to 25 m on the other side of the longitudinal direction of the tunnel 3.

[0079] Next, a fire determination process is performed (S23). That is, the fire determination processing unit 45 determines whether or not a fire has occurred in the monitoring area of ​​the detector 5. The fire determination process (S23) performs monitoring, determination, decision, and signal transmission processing, but detailed description thereof will be omitted.

[0080] Next, it is determined whether or not the power supply system of the detector 5 monitoring fires and the like has exceeded the allowable voltage range (S25). That is, the voltage monitoring unit 39 of the detector 5 detects, for example, the voltage of the power supply unit 37, and it is determined whether or not the detected voltage is within the allowable value.

[0081] If the power supply system of the monitored detector 5 is within the allowable voltage range, it is determined whether or not a check lamp test start signal has been sent from the disaster prevention receiving panel 7 (S27).

[0082] When a check lamp test start signal is input, the contamination rate of the fire detection unit 9 is obtained by the lighting operation (or blinking operation) of the check lamp 27 (S28). The obtained contamination rates are stored in two addresses of the EEPROM 13 (S29). Also, in step S29, if the obtained contamination rate is greater than a predetermined threshold, a contamination alarm is output to the disaster prevention receiving panel 7 (S34). The contamination rate is a numerical value indicating the intensity of light.

[0083] Next, it is determined whether or not there is an error in the pollution rate stored in EEPROM 13 in step S29 (S31). This determination is made based on whether or not the pollution rates stored in the two addresses of EEPROM 13 match, and if the pollution rates stored in the two addresses match, it is determined that there is no error in the pollution rate stored in EEPROM 13, and if the pollution rates stored in the two addresses do not match, it is determined that there is an error in the pollution rate stored in EEPROM 13.

[0084] If it is determined in step S31 that there is no error in the contamination rate stored in the EEPROM 13, the process returns to step S23.

[0085] If in step S25 the allowable voltage range is exceeded in the power supply system of the detector 5, the detector 5 that has exceeded the allowable voltage range outputs a power supply system fault signal to the disaster prevention receiving panel 7, and fire monitoring by the failed detector 5 is stopped (S33).

[0086] If the voltage of at least one of the power supply systems of the detectors 5 monitored in step S25 exceeds the allowable range, the fire monitoring by the tunnel disaster prevention system 1 may be stopped.

[0087] If the check lamp test start signal is not input in step S27, the process returns to step S23.

[0088] In step S28, if the obtained contamination rate is equal to or higher than a predetermined threshold value (if contamination is present), a contamination alarm is output (S34), and the obtained contamination rates are stored in each of two addresses in the EEPROM 13 (S29).

[0089] If it is determined in step S31 that there is an error in the contamination rate stored in EEPROM 13, the detector 5 with the contamination rate error outputs a fault signal from EEPROM 13 to the disaster prevention receiving panel 7, and fire monitoring by the faulty detector 5 is stopped (S35).

[0090] If a failure occurs in the EEPROM 13 of at least one of the EEPROMs 13 of the detectors 5 monitored in step S31, the fire monitoring by the tunnel disaster prevention system 1 may be stopped.

[0091] Next, the operation of the disaster prevention receiving panel 7 will be described with reference to Figs.

[0092] The disaster prevention receiving panel 7 first performs an initialization process (S51), and then performs a fire determination process (S53). The fire determination process is performed based on whether or not a signal indicating that a fire has occurred is received from the detector 5. The fire determination process (S53) involves monitoring, determination, decision, and signal transmission processes, but detailed explanations will be omitted.

[0093] Next, it is determined whether a signal indicating that the power supply system has failed has been received from the detector 5 (S55), and if a signal indicating that the power supply system has failed has not been received from the detector 5, it is determined whether the time for the check lamp test has arrived (whether the time to measure the contamination rate has arrived) (S57).

[0094] When the time for the check lamp test arrives, a detector 5 is designated (a detector number is designated) and a signal to the designated detector to perform a check lamp test is transmitted (S59).

[0095] Next, a test result signal is received from the specified detector 5 (S61), and the test result (for example, the contamination rate) based on this received signal is displayed on the display unit 55 (S63).

[0096] Next, it is determined whether or not a failure signal (a signal indicating that an error has occurred in the EEPROM 13) has been received from the specified detector 5 (S65).

[0097] If a failure signal is not received from the specified detector 5, the operations of steps S59 to S65 are repeated for all of the other detectors 5 (S67). Note that the group of operations from step S59 to step S67 is performed in a comparatively short time, for example.

[0098] Next, it is determined whether there is a detector 5 whose monitoring area has been changed from 25 m to 50 m, and whether the broken detector 5 has been restored (replaced or repaired) (S69), and if the broken detector 5 has been restored, it is determined whether the monitoring range of the detector 5 adjacent to this broken detector 5 has been restored (S71), and the monitoring range of the detector 5 whose monitoring range has been changed is restored (back from 50 m to 25 m; S73). The monitoring range of this detector 5 is restored by specifying the number of the detector 5 whose monitoring range should be restored, and manually sending a restoration signal to the detector 5 via the disaster prevention receiving panel 7, for example.

[0099] Next, it is determined whether or not a restoration signal (switching response signal) has been received from the detector 5 which has restored its monitoring range (S75), and if a signal has been received from the detector 5 which has restored its monitoring range, a number or the like indicating the detector 5 which has restored its monitoring range is displayed on the display unit 55 (S77), and the process returns to step S53.

[0100] If a signal indicating that the power supply system has failed is received in step S55, the number of the failed detector 5 is displayed on the display unit 55 (S101).

[0101] Next, a signal to expand the monitoring area from 25 m to 50 m is sent to the detectors 5 on both sides of the failed detector 5 (S103). This signal may be sent automatically or manually.

[0102] Next, signals (signals indicating that a signal has been received to expand the monitoring area from 25 m to 50 m) are received from the detectors 5 on either side of the failed detector 5 (S105), and the number or other information indicating the detector 5 that has expanded the monitoring range is displayed on the display unit 55 (S107), and processing of step S57 is performed.

[0103] If it is determined in step S57 that the time for the check lamp test has not yet arrived, the process returns to step S53.

[0104] If a failure signal is received from the detector 5 specified in step S65, the processes of steps S101 to S107 are carried out, and then the process of S67 is carried out.

[0105] In step S69, if the detector 5 whose monitoring area has been changed has not been restored, the process returns to step S53.

[0106] In step S71, if the monitoring range of the detector 5 whose monitoring area has been changed is not restored, the process returns to step S53.

[0107] According to the tunnel disaster prevention system 1, there are a plurality of detectors 5 installed at a predetermined interval in the tunnel 3 so that the monitoring area can be switched, and there is a disaster prevention receiving panel 7 which, when a predetermined detector 5C among the plurality of detectors 5 fails, expands the monitoring area of ​​the detectors 5B and 5D installed next to the failed detector 5C. Therefore, even when the predetermined detector 5C fails, it is possible to prevent unmonitored areas within the tunnel 3 from occurring without a maintenance technician having to rush to the site to perform maintenance work.

[0108] In addition, even if double monitoring is performed inside the tunnel 3 using detectors 5 due to tunnel management regulations, etc., the double monitoring inside the tunnel 3 can be maintained without a maintenance staff member having to rush to the site to perform maintenance work.

[0109] As a result, even if a specific detector 5C breaks down, there is no need to impose traffic restrictions when traffic volume is high, and maintenance work on the detector 5C can be carried out, for example, at night when traffic volume is low, together with other construction work.

[0110] In addition, in the tunnel disaster prevention system 1, the monitoring area of ​​the detector 5 is formed on both sides of the detector 5, and the monitoring area of ​​the detector 5 can be set to a first monitoring area or a second monitoring area (a second monitoring area twice as long as the first monitoring area), and the specified interval when installing multiple detectors 5 in the tunnel 3 is equal to the length of the first monitoring area.

[0111] When all detectors 5 are operating normally, the monitoring areas of all detectors 5 are set as the first monitoring area, and when one detector 5C fails, the monitoring areas of the neighboring detectors 5B and 5D (the monitoring areas on the side of the failed detector 5C) are set as the second monitoring area, so that even when one detector 5C fails, double monitoring is possible throughout the tunnel 3 (see Figures 5 and 7).

[0112] Furthermore, if the specified interval between multiple detectors 5 is equal to the length of the second monitoring area, and when all detectors 5 are operating normally, the monitoring areas of all detectors 5 are set to the first monitoring area, and when one detector 5C fails, the monitoring areas of the neighboring detectors 5B and 5D (the monitoring area on the side of the failed detector 5C) are set to the second monitoring area, it is possible to avoid a situation in which an unmonitored area is formed within the tunnel 3 even when one detector 5C fails (see Figures 15 and 16).

[0113] Furthermore, according to the tunnel disaster prevention system 1, the detector 5 is configured to include a light receiving unit 9, a test light emitting unit 11, and a memory 13, and whether or not a malfunction has occurred in the detector 5 is confirmed by storing the intensity of the light received by the light receiving unit 9 when the test light emitting unit 11 emits light (infrared light) in each of a number of addresses in the memory 13, and then comparing the light intensity values ​​stored in each address, thereby enabling the occurrence of a malfunction in the detector 5 to be accurately detected.

[0114] Furthermore, according to the tunnel disaster prevention system 1, whether or not a malfunction has occurred in the detector 5 is determined by detecting whether or not the voltage detected by the voltage monitoring processing unit 47 is outside the allowable range, which also makes it possible to accurately detect the occurrence of a malfunction in the detector 5.

[0115] Here, a tunnel disaster prevention system 1a according to a modified example will be described with reference to FIG.

[0116] A tunnel disaster prevention system 1a according to the modified example differs from the tunnel disaster prevention system 1 shown in FIG. 1 etc. in the installation position of the detector 5 relative to the compartment fire extinguishing section 71, but is otherwise configured similarly to the tunnel disaster prevention system 1.

[0117] In the tunnel disaster prevention system 1a shown in Figure 13, multiple compartments 65 are set up inside the tunnel 3, separated in the longitudinal direction of the tunnel 3, and a fire extinguishing system 67 having multiple compartment fire extinguishing units 71 that spray water spray or air bubbles is provided for each of the multiple compartments 65.

[0118] On the other hand, in the tunnel disaster prevention system 1a, each of the multiple detectors 5 is installed at the boundary between the multiple sections 65 in the longitudinal direction of the tunnel 3. Note that each of the multiple detectors 5 may be installed near the boundary between the multiple sections 65 in the longitudinal direction of the tunnel 3.

[0119] According to the tunnel disaster prevention system 1a, each of the multiple detectors 5 is installed at or near the boundary between the multiple compartments 65, thereby reducing the amount of water spray or air bubbles consumed in the event of a fire.

[0120] That is, in the tunnel disaster prevention system 1 shown in Fig. 6, in an embodiment in which the detectors 5 are installed in the center of each section 65 in the longitudinal direction of the tunnel 3, for example, if a fire occurs in the second section 65B, the detectors 5B and 5C detect the fire, but cannot determine whether the fire occurred in the second section 65B or the third section 65C. Therefore, water spray or air bubbles are sprayed on the second section 65B and the third section 65C.

[0121] In contrast, in the tunnel disaster prevention system 1a shown in Figure 13, detectors 5 are installed at the boundaries between multiple compartments 65. Therefore, for example, if a fire breaks out in the second compartment 65B, detectors 5B and 5C can detect that a fire has broken out in the second compartment 65B, and water spray or air bubbles are sprayed only onto the second compartment 65B, thereby reducing the amount of water spray or air bubbles consumed.

[0122] Next, a tunnel disaster prevention system 1b according to a modified example will be described with reference to FIG.

[0123] A tunnel disaster prevention system 1b according to the modified example differs from the tunnel disaster prevention system 1a shown in FIG. 13 in the form of a compartment fire extinguishing section 71, but is otherwise configured in the same manner as the tunnel disaster prevention system 1a.

[0124] In other words, the compartment fire extinguishing unit 71 of the tunnel disaster prevention system 1b is configured to spray water spray or air bubbles not only on the compartment 65 in which the compartment fire extinguishing unit 71 is installed, but also on the adjacent compartment adjacent to the compartment 65 in which the compartment fire extinguishing unit 71 is installed.

[0125] Here, the tunnel disaster prevention system 1b will be described in detail using an example of three compartments (a second compartment 65B, a third compartment 65C, and a fourth compartment 65D) adjacent to each other in the longitudinal direction of the tunnel 3. A third compartment fire extinguishing unit 71C is provided in the third compartment 65C.

[0126] The third compartment fire extinguishing section 71C is configured to spray water spray or air bubbles not only onto the third compartment 65C, but also onto a portion of the second compartment 65B and a portion of the fourth compartment 65D.

[0127] The part of the second section 65B is a portion 71Cb extending from the end of the third section 65C on the second section 65B side to a point 71Ca located a predetermined distance away from the third section 65C in the longitudinal direction of the tunnel 3. The point 71Ca is located within the second section 65B and is located closer to the third section 65C than the center of the second section 65B.

[0128] The part of the fourth section 65D is a region 71Cd extending from the end of the third section 65C on the fourth section 65D side to a point 71Cc located a predetermined distance away from the third section 65C in the longitudinal direction of the tunnel 3. The point 71Cc is located within the fourth section 65D and is located closer to the third section 65C than the center of the fourth section 65D.

[0129] The second compartment fire extinguishing section 71B is also configured to spray water spray or air bubbles to the areas 71Bb and 71Bd, similar to the third compartment fire extinguishing section 71C. The fourth compartment fire extinguishing section 71D is also configured to spray water spray or air bubbles to the areas 71Db and 71Dd, similar to the third compartment fire extinguishing section 71C. Furthermore, the other compartment fire extinguishing sections 71 are also configured to spray water spray or air bubbles in a similar manner.

[0130] As a result, an area (overlapping radiation area) 71Va where water spray or air bubbles are emitted in an overlapping manner is formed near the boundary between the second section 65B and the third section 65C, and the detector 5B is installed within the overlapping radiation area 71Va in the longitudinal direction of the tunnel 3.

[0131] In addition, near the boundary between the third section 65C and the fourth section 65D, an area (overlapping radiation area) 71Vb where water spray or air bubbles are emitted in an overlapping manner is formed, and the detector 5C is installed within the overlapping radiation area 71Vb in the longitudinal direction of the tunnel 3.

[0132] Further, in a similar manner, overlapping radiation portions are formed in the vicinity of the boundaries of the other sections 65, and the detectors 5 are installed in the overlapping radiation portions in the longitudinal direction of the tunnel 3.

[0133] According to the tunnel disaster prevention system 1b, the compartment fire extinguishing unit 71 is configured to spray water spray or air bubbles not only on the compartment in which the compartment fire extinguishing unit 71 is installed, but also on an area adjacent to the compartment in which the compartment fire extinguishing unit 71 of the adjacent compartment is installed, so that any fire that does occur can be extinguished more reliably.

[0134] For example, if a fire occurs in the third section 65C near the detector 5C, the amount of water spray or air bubbles emitted to the area near the left side of the detector 5C may be insufficient in the embodiment shown in Fig. 13. In contrast, in the embodiment shown in Fig. 14, a sufficient amount of water spray or air bubbles is emitted to the area near the left side of the detector 5C.

[0135] In addition, the state of the tunnel disaster prevention systems 1, 1a, 1b and changes to the monitoring area of ​​the detector 5 may be made by an external device connected to the tunnel disaster prevention systems 1, 1a, 1b via the transmission unit 61 shown in Figure 4.

[0136] Here, the configuration of the tunnel disaster prevention system 1 at the entrance 73 of the tunnel 3 will be described with reference to Fig. 19. In the longitudinal direction of the tunnel 3, an entrance section 65 (65X), a first section 65 (65A), a second section 65 (65B), etc. are arranged in this order from the entrance 73 toward the inside of the tunnel 3. The length of the entrance section 65X in the longitudinal direction of the tunnel 3 is 25m, and the lengths of the first section 65A, the second section 65B, etc. are 50m.

[0137] Detector 5 (5X) is installed at the wellhead 73. Detector 5 (5A) is installed in the center of the first section 65A, and detector 5 (5B) is installed in the center of the second section 65B.

[0138] The monitoring area of ​​the detector 5X is installed only toward the inside of the tunnel 3. The length of the first monitoring area of ​​the detector 5X is 25 m (see arrow X1), and the length of the second monitoring area of ​​the detector 5X is 50 m (see arrow Xw1).

[0139] The detection of a fire between the detector 5X and the detector 5A will be described. In a normal state, the detector 5X monitors the first monitoring area (see arrow X1), and the detector 5A also monitors the first monitoring area (see arrow A1).

[0140] In a normal state, when the detector 5X fails, the monitoring area of ​​the detector 5A (the monitoring area of ​​the failed detector 5X) is set to the second monitoring area (see arrow Aw1). On the other hand, when the detector 5A fails, the monitoring area of ​​the detector 5X is set to the second monitoring area (see arrow Xw1).

[0141] 19, the compartment fire extinguishing section (approximately 50 m compartment) 71A is installed in the first compartment (50 m compartment) 65A, but the compartment fire extinguishing section 71A may be divided into two in the longitudinal direction of the tunnel 3 to provide two fire extinguishing compartment sections (two 25 m fire extinguishing compartment sections) in the first compartment 65A. Similarly, two fire extinguishing compartment sections may be provided in the second compartment (50 m compartment) 65B, etc.

[0142] Next, the configuration of another tunnel disaster prevention system 1 at the entrance 73 of the tunnel 3 will be described with reference to Fig. 20. The tunnel disaster prevention system 1 shown in Fig. 19 does not assume that sunlight will enter the inside of the tunnel 3 from the entrance 73, but the tunnel disaster prevention system 1 shown in Fig. 20 assumes that sunlight will enter the inside of the tunnel 3 from the entrance 73. In other words, the tunnel disaster prevention system 1 shown in Fig. 20 is designed to avoid the risk of the detector 5 malfunctioning due to sunlight entering the inside of the tunnel 3.

[0143] As shown in FIG. 20, the tunnel 3 is arranged in the order of the first section (section at the entrance) 65 (65X), the second section 65 (65A), the second section 65 (65B), etc., from the entrance 73 toward the inside of the tunnel 3 in the longitudinal direction. The length of the entrance section (entrance section) 65X in the longitudinal direction of the tunnel 3 is 50 m, and the lengths of the second section 65A and the third section 65B are also 50 m. The entrance section 65X is composed of a section on the entrance 73 side (entrance side section) 65X1 and a section on the second section 65A side (opposite entrance side section) 65X2. The length of the entrance side section 65X1 and the opposite entrance side section 65X2 is 25 m.

[0144] Detector 5 (5X1) is installed at the wellhead 73. Detector 5 (5X2) is installed at the boundary 81 between wellhead side section 65X1 and anti-wellhead side section 65X2 (the center of wellhead section 65X). Detector 5 (5A) is installed at the center of second section 65A, and detector 5 (5B) is installed at the center of third section 65B.

[0145] The monitoring area of ​​detector 5X1 is installed only in the inside direction of tunnel 3. The length of the first monitoring area of ​​detector 5X1 is 25 m (see arrow X1), and the length of the second monitoring area of ​​detector 5X1 is 50 m (see arrow Xw1). The monitoring area of ​​detector 5X2 is also installed only in the inside direction of tunnel 3. The length of the first monitoring area of ​​detector 5X2 is 25 m (see arrow X2), and the length of the second monitoring area of ​​detector 5X2 is 50 m (see arrow Xw2).

[0146] Under normal conditions, when detector 5X2 fails, the monitoring area of ​​detector 5A (the monitoring area on the failed detector 5X2 side) is set as the second monitoring area (see arrow Aw1), and further, the monitoring area of ​​detector 5X1 (the monitoring area on the failed detector 5X2 side) is set as the second monitoring area (see arrow Xw1).

[0147] When the detector 5X2 fails, only the monitoring area of ​​the detector 5A may be set as the second monitoring area, or the monitoring area of ​​the detector 5X1 may be set as the second monitoring area.

[0148] In addition, under normal conditions, when detector 5A fails, the monitoring area of ​​detector 5X2 (the monitoring area on the failed detector 5A side) is set as the second monitoring area (see arrow Xw2), and further, the monitoring area of ​​detector 5B (the monitoring area on the failed detector 5A side) is set as the second monitoring area (see arrow Bw1).

[0149] When the detector 5A fails, only the monitoring area of ​​the detector 5X2 may be set as the second monitoring area, or the monitoring area of ​​the detector 5B may be set as the second monitoring area.

[0150] In addition, the monitoring area of ​​detector 5X2 can be set to the entrance 73 side of tunnel 3 as well, and under normal circumstances, the monitoring area of ​​detector 5X2 can be installed only on the inside direction of tunnel 3, and in the event that detector 5X1 fails, the monitoring area of ​​detector 5X2 can be set to the entrance 73 side of tunnel 3 as well.

[0151] In the tunnel disaster prevention system 1 shown in Fig. 20, a compartment fire extinguishing section (approximately 50 m compartment) 71X is installed in the first compartment (50 m compartment) 65X, but similarly to the case described in the tunnel disaster prevention system 1 shown in Fig. 19, the compartment fire extinguishing section 71X may be divided into two in the longitudinal direction of the tunnel 3 to provide two fire extinguishing compartment sections in the first compartment 65X. Similarly, two fire extinguishing compartment sections may be provided in the second compartment (50 m compartment) 65A, etc. [Explanation of symbols]

[0152] 1. Tunnel disaster prevention system 3. Tunnel 5, 5B, 5C, 5D Detectors 7 Emergency reception panel 9 Light receiving section 11 Test light emission section 13 Memory (EEPROM) 39 Voltage monitoring unit Sections 65, 65B, 65C, 65D 67 Fire extinguishing equipment 71, 71C Compartment Fire Department 71Cb, 71Cd site

Claims

1. A plurality of detectors capable of switching monitoring areas and installed in the tunnel at predetermined intervals in the longitudinal direction; a disaster prevention receiving panel that, when a predetermined detector among the plurality of detectors fails, expands a monitoring area of ​​a detector installed next to the failed detector; having The monitoring area of ​​the detector is configured to be formed on both sides of the detector, The monitoring area of ​​the detector can be switched between a first monitoring area and a second monitoring area having a length twice as long as the first monitoring area in the longitudinal direction, and the value of the predetermined interval in the plurality of detectors is equal to the length of the first monitoring area or the length of the second monitoring area; When a predetermined detector among the plurality of detectors fails, the monitoring area is expanded by switching a monitoring area of ​​a detector installed next to the failed detector from the first monitoring area to the second monitoring area, A tunnel disaster prevention system characterized in that, in order to avoid the risk of the detector malfunctioning due to sunlight entering the tunnel from the tunnel entrance, the function of one of the monitoring areas on both sides of a detector installed at the tunnel entrance among the multiple detectors is removed, and the monitoring area of ​​the detector installed at the tunnel entrance is installed only toward the inside of the tunnel.

2. A plurality of detectors capable of switching monitoring areas and installed in the tunnel at predetermined intervals in the longitudinal direction; a disaster prevention receiving panel that, when a predetermined detector among the plurality of detectors fails, expands a monitoring area of ​​a detector installed next to the failed detector; having The monitoring area of ​​the detector is configured to be formed on both sides of the detector, The monitoring area of ​​the detector can be switched between a first monitoring area and a second monitoring area having a length twice as long as the first monitoring area in the longitudinal direction, and the value of the predetermined interval in the plurality of detectors is equal to the length of the first monitoring area or the length of the second monitoring area; When a predetermined detector among the plurality of detectors fails, the monitoring area is expanded by switching a monitoring area of ​​a detector installed next to the failed detector from the first monitoring area to the second monitoring area, A plurality of sections separated in a longitudinal direction of the tunnel are set in the tunnel, A fire extinguishing system is provided, the fire extinguishing system including a plurality of compartment fire extinguishing units each of which discharges a fire extinguishing agent for each of the plurality of compartments, The fire extinguishing equipment is composed of a water spray fire extinguishing equipment that sprays water as the fire extinguishing agent in a spray form from a water spray head, or a foam spray fire extinguishing equipment that sprays air foam as the fire extinguishing agent from a foam head, The detector is installed in a central portion of each of the plurality of compartments, a length of the first monitoring area in a longitudinal direction of the tunnel is equal to a length of the section in the longitudinal direction of the tunnel; A tunnel disaster prevention system characterized in that, in order to avoid the risk of the detector malfunctioning due to sunlight entering the tunnel from the tunnel entrance, the function of one of the monitoring areas on both sides of a detector installed at the tunnel entrance among the multiple detectors is removed, and the monitoring area of ​​the detector installed at the tunnel entrance is installed only toward the inside of the tunnel.

3. A tunnel disaster prevention system according to claim 2, A tunnel disaster prevention system characterized in that it is configured to spray water spray or air bubbles not only to the compartment in which the compartment fire extinguishing unit is installed, but also to an adjacent compartment adjacent to the compartment in which the compartment fire extinguishing unit is installed.

4. A tunnel disaster prevention system according to any one of claims 1 to 3, the detector includes a light receiving unit, a test light emitting unit, and a memory; A tunnel disaster prevention system characterized in that whether or not a malfunction has occurred in the detector is determined by storing the intensity of light received by the light receiving unit when the test light emitting unit emits light in each of a number of addresses in the memory, and then comparing the light intensities stored in each of the addresses.

5. A tunnel disaster prevention system according to any one of claims 1 to 4, The detector includes a voltage monitoring unit that monitors a voltage of a power supply supplied to the detector, A tunnel disaster prevention system characterized in that whether or not a malfunction has occurred in the detector is determined by detecting whether or not the voltage detected by the voltage monitoring unit is outside an acceptable range.

Images