JP2019139657A - Tunnel internal state detector, tunnel having the same and tunnel internal state monitoring system - Google Patents

Abstract

To provide a tunnel internal state detector, a tunnel having the same and a tunnel internal state monitoring system, capable of achieving easy installation work in a tunnel and excellent maintenance and inspection performance as well as prompt detection of an accident in a tunnel, such as fire, internal wall drop and traffic accident, under its initial state.SOLUTION: A tunnel internal state monitoring system (S) includes a plurality of monitors 10A, 10B, 10C... Each of the monitors includes device bodies (1, 4) which acquire image information of the inside of a tunnel (T) using a laser radar technique or the like and which detects the presence/absence or sign of an accident from the acquired image information by image processing, and an installation unit (7) for installing the device bodies (1, 4) on a side strip (W) in the tunnel.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for monitoring the internal state of a tunnel.

  Conventionally, a tunnel is equipped with a fire detector that detects flames in addition to fire extinguishing equipment such as a fire extinguisher and a fire hydrant (see, for example, Patent Document 1).

JP 2004-152134 A

  However, since the flame is not sufficiently generated in the initial state of the fire, the fire detector that detects the flame cannot detect the fire quickly, and there is a possibility that the fire detection is delayed. When the fire detection is delayed, if it is an automobile tunnel, a general person such as a car driver in the tunnel reports 119, and the fire extinguisher is fire extinguisher until the fire department is dispatched to perform the fire extinguishing activity. For this reason, there is still room for consideration in fire countermeasures (early detection, early fire extinguishing) in tunnels, including automatic digestion equipment such as sprinklers.

  On the other hand, if the smoke accompanying the fire is detected, it is possible to detect the fire more quickly in the initial state than when detecting the flame. Here, since smoke accompanying a fire rises upward, it is conceivable that a fire detector is attached to the ceiling of the tunnel when this type of fire detector is installed in the tunnel. However, when a fire detector is attached to the ceiling of the tunnel, it may fall due to the influence of disturbance such as vibration. In addition, there is a problem that the installation work and maintenance inspection take time and cost.

  Therefore, the present invention has been made paying attention to such problems, and is easy to install in the tunnel and excellent in maintenance and inspection. In addition, disasters such as fires in the tunnel are in its initial state. It is an object of the present invention to provide a tunnel internal state detection device that can be detected quickly with a tunnel, a tunnel equipped with the device, and a tunnel internal state monitoring system.

  In order to solve the above-described problem, a tunnel internal state detection device according to an aspect of the present invention includes a detection unit that detects an internal state by image processing from image information of an internal state of a tunnel, and the detection unit in the tunnel. And a mounting portion attached to the roadside belt.

A tunnel according to one aspect of the present invention is characterized in that the roadside belt is equipped with the tunnel internal state detection device according to one aspect of the present invention.
A tunnel internal state monitoring system according to an aspect of the present invention is characterized by monitoring the internal state of a tunnel using the tunnel internal state detection device according to one aspect of the present invention.

  According to the tunnel internal state detection device according to the present invention, the tunnel internal state detection device includes a detection unit that detects the internal state of the tunnel, and a mounting unit that attaches the detection unit to a roadside belt in the tunnel. The presence or absence of smoke can be grasped by detecting the internal state by image processing from the image information of the internal state. Therefore, a fire in the tunnel can be detected quickly in its initial state.

  In addition, since the mounting part is attached to the roadside belt in the tunnel, when installing the tunnel internal condition detection device in the tunnel, compared with the case where a fire detector is attached to the ceiling of the tunnel, vibration etc. The possibility of falling due to the influence of the external disturbance is low, and even if it falls, the tunnel internal state detection device is provided at a low position, so that it is relatively safe. Furthermore, since the tunnel internal state detection device is provided at a low position, the time and cost required for the installation work and maintenance inspection can be reduced.

  The tunnel according to one aspect of the present invention is equipped with the tunnel internal state detection device according to one aspect of the present invention in the roadside belt, and the tunnel internal state monitoring system according to one aspect of the present invention includes the present invention. A tunnel internal state detection device according to an aspect of the invention is used to monitor the internal state of a tunnel. Therefore, according to any aspect of the present invention, installation work in the tunnel is easy and excellent in maintenance and inspection, and disasters such as fires in the tunnel can be quickly detected in the initial state.

  As described above, according to the present invention, installation work in the tunnel is easy and excellent in maintenance and inspection, and disasters such as fires in the tunnel can be quickly detected in the initial state.

It is a schematic diagram explaining one Embodiment of the tunnel equipped with the tunnel internal condition monitoring system which concerns on this invention. It is a block diagram explaining one Embodiment of the tunnel internal condition monitoring system with which the tunnel of FIG. 1 was equipped. It is a schematic diagram explaining one Embodiment of the tunnel internal condition detection apparatus provided in the roadside belt | band | zone in a tunnel. It is a schematic diagram explaining the state (vehicle running condition and inner wall condition) which monitors the inside of the tunnel of the figure using the tunnel internal condition monitoring system of FIG. It is a schematic diagram explaining the disaster detection operation | movement (fire initial stage) using the tunnel internal condition monitoring system of FIG. It is a schematic diagram explaining the disaster detection operation | movement (flame generation | occurrence | production) using the tunnel internal condition monitoring system of FIG. It is a schematic diagram explaining the disaster detection prediction operation (falling object detection) which monitors the tunnel of the figure using the tunnel internal condition detection apparatus of FIG. FIG. 2 is a schematic diagram for explaining a disaster detection prediction operation (entering a person) for monitoring the tunnel of FIG. 1 using the tunnel internal state detection device of FIG. 1. It is a schematic diagram explaining the detection operation | movement (eye safety monitoring) which monitors the tunnel of the figure using the tunnel internal condition detection apparatus of FIG. It is a schematic diagram explaining an example of the tunnel equipped with the conventional fire detector.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. The drawings are schematic. For this reason, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the dimensional relationship and the ratio are different between the drawings. Further, the following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, and arrangement of components. Etc. are not specified in the following embodiments.

  As shown in FIG. 1, the tunnel T of the present embodiment is equipped with a tunnel internal state monitoring system (hereinafter also simply referred to as “monitoring system”) S. An appropriate place of the tunnel T is provided with a shelter (not shown) and a guide light to the shelter. The “tunnel” in the present specification is an underground or underground passage that is relatively long and horizontally provided along the extending direction in which both ends are open to the atmosphere. Not limited to railroads including railway tunnels.

  In the tunnel T of the present embodiment, as shown in the figure, a plurality of tunnel internal state detection devices (hereinafter also simply referred to as “detection devices”) 10A, 10B, 10C,. . In the present embodiment, each of the detection devices 10A, 10B, 10C,... Is installed at every predetermined interval D (for example, D = 50 m) in the extending direction of the tunnel T. Since the configurations of the detection devices 10A, 10B, 10C,.

  The monitoring system S of the present embodiment is configured using at least one tunnel internal state detection device 10 and a monitoring device 20. In the example of the present embodiment, a monitoring room Z in which an operator is stationed is provided in a remote place away from the tunnel T. The monitoring room Z is equipped with necessary devices including a monitoring device 20, a display unit 30 such as a display, and an operation unit 40 such as a keyboard and a mouse.

  As shown in FIG. 2, each detection device 10 includes at least a laser radar device 1 and a detection unit 4 that detects the state of an object such as smoke by image processing based on mapping information acquired by the laser radar device 1. Have. Each detection device 10 is connected to the monitoring device 20 via a cable C. The monitoring device 20 includes a display unit 30 that displays an image of the internal state of the tunnel T on the screen from the image information acquired from each detection device 10. In addition, the detection apparatus 10 of this embodiment may be used independently, and may be used combining several units | sets. By cooperating with a plurality of units, the state of smoke can be displayed three-dimensionally by scanning in the horizontal direction and the vertical direction.

  More specifically, the monitoring device 20 is configured to include a computer and is an information processing device that executes a program necessary for monitoring the internal state of the tunnel T. As illustrated in FIG. And a control unit 22. The monitoring device 20 is connected to each of the detection devices 10A, 10B, 10C,... Via a cable C that can exchange necessary power and signals.

  As shown in the figure, each detection device 10 includes a box-shaped housing 6 having a hollow rectangular parallelepiped shape, and a mounting portion 7 attached to an appropriate position on the outer surface of the housing 6. In the example of the present embodiment, the mounting portion 7 is provided on the outer surface of the housing 6. In addition, since each detection apparatus 10 has the same structure, the structure is shown as an example of the detection apparatus 10A in the figure, and illustration and description of the other detection apparatuses 10B, 10C,.

Each detection device 10 incorporates a laser radar (Lidar) device 1 and an infrared (IR) camera 2 as an image information acquisition unit in a housing 6. In this example, infrared rays (camera 2 corresponds to the image acquisition means in the image information acquisition unit.
The laser radar device 1 and the infrared camera 2 are synchronized with each other, and the infrared camera 2 removes the timing at which the laser radar device 1 projects and receives the pulsed laser so as not to receive the interference of the pulsed laser. An electronic shutter is configured to acquire information. Similarly, the detection devices 10 are also synchronized with each other, and mutual interference with other adjacent detection devices 10 is prevented.

  In the present embodiment, the laser radar device 1 and the infrared camera 2 are provided at the upper position in the housing 6 while being placed on the turning mechanism 3. A detection unit 4 having a communication unit 5 is provided below the turning mechanism 3. The turning mechanism 3 of the present embodiment is capable of turning the laser radar device 1 and the infrared camera 2 in the range of 180 degrees in the horizontal direction.

  As shown in the front view of FIG. 3, the detection apparatus 10 has a housing 6 constituting the apparatus main body attached to a position of a roadside band W in the tunnel T by a mounting part 7. In the example of this embodiment, it is mounted at the mounting position provided on the peripheral wall surface at the position of the roadside belt W. The detection device 10 is provided so that the installation height of the laser radar device 1 is lower than 1 meter (average height of a 4-year-old child) in the mounted state. A 4-year-old child is assumed to be the youngest infant who may walk on the roadside belt as an emergency evacuation route. The mounting part 7 attaches the detection device 10 to the roadside belt W in the tunnel T so as to be detachable with bolts, for example. In the example of the present embodiment, an example in which the vehicle is traveling on the right side is illustrated, but it is needless to say that the present invention is applicable even when the vehicle is traveling on the left side.

  The detection device 10 is installed by the laser radar device 1 so as to irradiate the laser radar toward the traveling lane L side in the tunnel and above the vehicle M. The detection device 10 of the present embodiment drives the turning mechanism 3 to scan the laser radar device 1 in the horizontal direction within a range of 180 °, whereby the situation in the tunnel continues in the horizontal and vertical directions. It is possible to monitor the inside of the tunnel.

  The laser radar device 1 is configured to be able to acquire image information (mapping information) of the internal state of the tunnel T including smoke and the like by a lidar technique. That is, the laser radar device 1 irradiates a predetermined pulse laser toward the inside of the tunnel, performs coherent detection of the reflected light and scattered light returning, records the time response waveform of the received signal, and corresponds to the time delay By obtaining the scattering intensity for each and generating a “point cloud” that is a set of coordinates, it is possible to acquire the characteristics of the object in the tunnel inside the situation as mapping information.

  The specifications of the laser radar device 1 are, for example, a maximum measurement range of 50 m, a horizontal scanning angle by the turning mechanism 3 of 180 °, an angular resolution of 0.5 °, a scanning speed of 60 times / sec, and the like. Laser radar technology can recognize unevenness of an object that becomes a long-distance object over a wide range. The infrared camera 2 is configured to be able to acquire image information of the internal state of the tunnel T including high-temperature smoke and flame.

The laser radar device 1 of the present embodiment has a light emitting part and a light receiving part of a pulse laser, and a pulse laser emitted from the light emitting part is irradiated to a target in the tunnel, and the reflected light is detected by the light receiving part. It is supposed to be entered as. Here, in the laser radar device 1 of the present embodiment, the pulse laser is eye safety, and the output intensity of the laser is 25 W / m ² or less. The laser wavelength is an eye-safe band of 1.4 μm or more.

  The definition of “eye safety” is the light intensity of a laser that does not damage the human eye, and satisfies the safety standards set by the International Electrotechnical Commission and the American Standards Association. The maximum allowable exposure for laser light depends on the wavelength and operating conditions. Infrared lasers within the wavelength range of 1.4 to 2.6 μm are more human than other wavelengths even if the pulse width, repetition frequency, etc. are changed. High tolerance that does not cause eye damage. As a laser in this band, high efficiency and high output can be achieved by semiconductor laser excitation using a material in which Er3 +, Tm3 +, Ho3 +, etc. are doped into YAG, YLF, or glass. A semiconductor laser that can directly output coherent laser light can also be used.

In the present embodiment, the laser radar device 1 measures the distance to the target by irradiating the laser radar to a predetermined scanning range in the vertical direction. Here, as shown in FIG. 3, the vertical scanning range of the laser radar of the present embodiment is set such that the maximum height H from the roadside belt side is 4.1 m or more.
In other words, as shown in the figure, the direction R in which the laser is emitted is when the distance from the installation location of the laser radar device 1 to the road of the automobile is Xm, and the installation location of the laser radar device 1 is Ym from the ground. , Θ = tan ⁻¹ (4.1−Y / X). By adopting this configuration, even if the pulse laser is not limited to eye safety, it is suitable for preventing the possibility that the pulse laser light will damage the driver's eyeball.

  Returning to FIG. 2, the detection unit 4 is an information processing device that includes a computer and executes a program necessary for monitoring the internal state of the tunnel T under the management of the monitoring device 20. Necessary communication can be performed with the communication unit 21 of the monitoring device 20. The detection unit 4 detects whether there is an abnormality in the internal state of the tunnel including flames and smoke by image processing from the image information (mapping information) acquired by the laser radar device 1 and the image information (internal state information) acquired by the infrared camera 2. Can be detected.

In the present embodiment, the detection unit 4 accurately draws the atmospheric conditions in the tunnel and the outlines of all the objects in the tunnel based on the mapping information indicating the characteristics of the objects in the tunnel output from the laser radar device 1. In addition, image processing (internal situation information) acquired by the infrared camera 2 is taken into account, and the processing program that can catch the initial stage of fire can be executed at an early stage by performing image processing on the feature points of the object. Has been.
The detection unit 4 also acquires distance information from the time from pulse laser projection to light reception (pulse laser propagation time) to the target based on the mapping information acquired by the laser radar device 1 using the laser radar technology. To do.

  The monitoring device 20 measures the distance to the object inside the tunnel that is the target of smoke and the like based on the information obtained by communicating the image information acquired from the detection device 10, and displays the unevenness of the object as a two-dimensional image. It can be displayed on the part 30. The distance information to the target is acquired as useful information for fire countermeasures (early detection, early fire extinguishment) in the tunnel T. For example, the location of the fire hydrant and the evacuation center closest to the fire occurrence site are set. It is considered as basic information. The monitoring device 20 is configured by a fire based on a predetermined reference (movement, shape, color) based on a shape based on a feature point of an image obtained by image processing, a hue set corresponding to a scattering intensity, a temporal change, and the like. It can be determined that smoke is generated.

  Further, the monitoring device 20 detects a flame occurrence point from the image information (internal situation information) acquired by the detection device 10 with the infrared camera 2, outputs flame information (flame detection signal), and obtains the obtained flame information. The flame information image-processed and imaged on the screen for displaying the mapping information can be superimposed on the display unit 30.

Next, the operation and effect of the tunnel internal situation monitoring system S will be described.
As shown in FIG. 4, the monitoring system S includes a plurality of detection devices 10, and each of the detection devices 10 </ b> A, 10 </ b> B, 10 </ b> C,. Since it is installed for each (for example, D = 50 m), it is possible to monitor the situation in the tunnel at any time including the traveling situation of the vehicle M and the situation of the inner wall of the tunnel. The symbols Ra and Rz shown in the figure indicate an image in which the laser radar device 1 projects and receives a pulse laser and monitors the internal state of the tunnel T by scanning in the horizontal direction and the vertical direction.

  Then, as shown in FIG. 5, if smoke K is generated from the vehicle M in the tunnel T, the detection unit 4 of the detection device 10 detects the smoke K from the mapping information acquired by the laser radar device 1, and The detection information is sent to the monitoring device 20 of the monitoring system S via the cable C. Based on the detection information including the mapping information acquired from the detection device 10, the monitoring device 20 can accurately draw the situation in the tunnel and the outlines of all the objects in the tunnel by predetermined image processing. Further, after detecting the smoke K and obtaining the detection information, as shown in FIG. 6, if a flame is detected, the flame detected by the infrared camera 2 is sent to the monitoring device 20 as flame information. .

  In particular, according to the present embodiment, mapping information and detection information input from the detection device 10 to the monitoring room Z monitoring device 20 are analyzed in detail by analysis processing including image processing in the monitoring device 20, and information on analysis results is obtained. Is stored in the storage device of the monitoring device 20. And the monitoring apparatus 20 displays the information of the analysis result memorize | stored in the memory | storage device on the display screen of the display part 30, and an operator can monitor the tunnel internal condition at any time in the monitoring room Z. FIG.

  Thereby, according to the monitoring system S of the present embodiment, it is possible to quickly catch the initial stage of the fire at an early time point when the smoke K is detected, and to create time for appropriate countermeasures. The operator can select and display a monitoring state on the display screen of the display unit 30 for the monitoring areas of the detection devices 10A, 10B, and 10C by performing predetermined input from the operation unit 40.

  Here, as shown in FIG. 10, conventional fire detectors 100A, 100B, and 100C have sensors built in detectors 100A, 100B, and 100C, and are introduced into detectors 100A, 100B, and 100C. Since the presence or absence of fire F from the vehicle M is detected based on the temperature of the target object and the degree of light scattering by the smoke, there is room for consideration in quickly detecting the fire in the tunnel in its initial state. There is a problem that a disaster in a tunnel other than a fire cannot be detected quickly in its initial state.

  On the other hand, according to the monitoring system S of the present embodiment, based on the mapping information acquired by the detection device 10 using the laser radar (Lidar) technology, image information of the internal state of the tunnel T including smoke, flame, and the like by image processing. Because it is possible to detect and monitor the tunnel internal situation from time to time, it is possible to quickly grasp whether there is an abnormality in the tunnel internal situation such as flame or smoke.

  And according to the monitoring system S of this embodiment, since each detection apparatus 10 can be installed in the roadside belt | band | zone W other than right above the range which the vehicle M travels within the tunnel T, as shown in FIG. The detection devices 10A, 10B, and 10C as fire detectors can be arranged at low positions, and the danger of the detection device 10 falling onto the traveling vehicle M can be avoided. Moreover, since each detection apparatus 10 can be installed at a low position, the time and cost required for installation work and maintenance of the detection apparatus 10 can be significantly reduced.

  In particular, according to the monitoring system S of the present embodiment, the monitor display of the display unit 30 is based on the display of information about disasters such as fire, falling of the inner wall, water leakage from the inner wall, cracking of the inner wall, traffic accidents, traffic volume, etc. Made. That is, the monitoring device 20 displays a two-dimensional image of the unevenness of the object on the display unit 30 by image processing based on the mapping information acquired from the reflected laser of the pulse laser emitted from the laser radar device 1, and smoke. In addition, a state relating to a fire such as a flame, a state of an inner wall such as falling or deterioration of an inner wall of a tunnel, a situation of a traffic accident, and the like can be monitored and stored as an image and displayed.

  Further, according to the detection device 10 of the present embodiment, since the infrared camera 2 is also provided, the smoke temperature information and the flame information acquired by the infrared camera 2 are also subjected to image processing and image information is transmitted to the monitoring device 20. And is superimposed and displayed on the monitor of the display unit 30. Thereby, the operator can select the tunnel from the many screen displays such as the presence / absence of fire, the location, and the scale displayed on the monitor screen of the display unit 30 by the operator (or automatically) based on the screen display. It is possible to respond to fire countermeasures (early detection, early fire extinguishment) quickly and accurately.

  According to the present embodiment, the presence or absence of abnormality in the tunnel internal condition including flames and smoke is quickly detected by the laser radar technology, and the output data of the laser radar device 1 is imaged on the monitor of the display unit 30 and detected. Since the operator can monitor the smoke generated by the fire that has been generated on the monitor screen of the display unit 30, it contributes to quick fire countermeasures (early detection, early extinguishment) in the tunnel. Furthermore, since the high-temperature smoke and flame can be superimposed on the monitor screen of the display unit 30 by the infrared camera 2, a more detailed fire display screen can be displayed, contributing to fire countermeasures (early detection, early extinguishing) in the tunnel. To do.

  In other words, according to the present embodiment, the tunnel interior state monitoring system S including the plurality of detection devices 10A, 10B, and 10C allows the interior of the tunnel to be operated in cooperation with smoke detection by the laser radar device 1 and flame detection by the infrared camera 2. The situation can be closely monitored. Moreover, in the monitoring system S provided with the detection apparatus 10 of this embodiment, since the tunnel inner wall can be monitored simultaneously as an object in addition to smoke and flame, the aging of the tunnel can be evaluated.

  For example, in the monitoring system S including the detection device 10 of the present embodiment, the automobile in the tunnel can be simultaneously monitored as an object in addition to smoke and flame. Therefore, in the example shown in FIG. The situation of the accident (for example, the posture and position of the vehicle) can be quickly grasped.

For example, in the monitoring system S including the detection device 10 according to the present embodiment, a falling object or the like on the traveling lane L can be quickly grasped as an object as in the example illustrated in FIG. Thus, it is possible to prevent a collision accident.
Further, for example, in the monitoring system S including the detection device 10 of the present embodiment, a person P walking on the travel lane L or the roadside belt W can be quickly grasped as an object, as in the example illustrated in FIG. Therefore, it contributes to the determination of the relationship between the person P and the disaster location, the direction to evacuate, and the like, and this is excellent in preventing or suppressing human damage. In particular, according to the detection device 10 of the present embodiment, the laser radar device 1 and the infrared camera 2 are provided with the turning mechanism 3 for turning the laser radar device 1 and the infrared camera 2 in the range of 180 degrees in the horizontal direction. Is preferred.

Further, according to the detection device 10 of the present embodiment, the laser radar device 1 is configured such that the scanning range (height) in the vertical direction of the laser radar is a range between the roadside zone and the maximum track height (4.1 m). If this setting is adopted, as shown in FIG. 9, the pulse laser beam from the laser radar device 1 is limited to a range that does not reach the driver's line of sight. . Eye safe is laser light that does not damage human eyes. In the example shown in the figure, the portion other than the scanning range is indicated by a shaded image. In order to closely monitor the internal state of the tunnel T, this setting can be canceled and the scanning range can be widened by an eye-safe laser radar.
At the time of monitoring for smoke monitoring at the beginning of the fire, the road administrator must be able to use the vehicle on the designated road (height-designated road) that is recognized as having no hindrance in the maintenance of the road structure and the prevention of traffic hazards. For example, since the upper limit of the height of a vehicle such as a truck is set to 4.1 meters, it is preferable to set the scanning range (height) of the laser radar to be equal to or higher than this height.

That is, in the laser radar device 1, the output intensity of the pulse laser beam is 25 W / m ² or less. This output intensity is an intensity that does not damage the human eyeball in any wavelength band. When the wavelength of the laser beam is 1.3 μm or more, even if it is 25 W / m ² or more, or even when it falls on the line of sight of a person, the pulse laser output from the laser radar device 1 is a human eyeball Will not damage. As in this embodiment, it is desirable to use a wavelength band of laser light of 1.3 μm or more that can achieve both spatial resolution, sensitivity, and eye safe.

  Moreover, according to this embodiment, since the installation height of the laser radar apparatus 1 is provided at a position lower than the average height (1 meter) of a 4-year-old infant who may walk, the detection apparatus 10 is Even if it falls, it does not hit the infant's head, so it is excellent in terms of safety.

  Note that the tunnel internal state detection device, the tunnel including the tunnel internal state detection device, and the tunnel internal state monitoring system according to the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. is there.

  For example, in the present embodiment, an example has been described in which each detection device 10 has a monitoring function for determining an abnormality. However, the detection device 10 is not limited to this, and the detected information is not limited to detecting the internal state of the tunnel. May be transmitted to the monitoring device 20, and the monitoring device 20 may be configured to monitor including abnormality determination. In the monitoring system S, such determination units (programs) can be arbitrarily distributed and provided in the system, and necessary information may be exchanged by communication with each other.

In the present embodiment, for example, a fire from a vehicle has been described as an example of a disaster. However, a disaster to be monitored inside the tunnel T is not limited to a fire or the above-described example, and is monitored by image processing. Of course, various disasters can be targeted if possible.
For example, the operator stores the area of the smoke detection range in advance in the monitoring device 20 by default, and detects an abnormality in the detection device 10 or the monitoring device 20 when the smoke detection area increases beyond the initial setting. It can be configured.
In addition, for example, the image information acquisition unit includes the infrared camera 2 as an image acquisition unit including a camera having sensitivity to infrared rays. However, the image information acquisition unit is not limited thereto, and is not limited to this. ) A camera can be provided. Further, it is possible to adopt a configuration in which no image acquisition means is provided other than the laser radar device 1.

Further, for example, the detection device 10 does not always operate the infrared camera 2 but performs monitoring by the laser radar device 1 during normal times, determines whether or not the detection unit 4 is abnormal, smoke in the tunnel T, etc. After the position estimated to be abnormal is identified, monitoring by the infrared camera 2 is also performed, and a flame generation display may be superimposed and displayed from the position of the detected object in the tunnel.
Further, for example, the detection device 10 is configured to determine a change in smoke distribution, capture the position and behavior of smoke generated from the coordinates of the change over time of the target, and predict and display the smoke flow on the screen. May be. In addition, for example, the detection device 10 may be configured to display a behavior (a grasp of smoke flow) in which smoke gradually covers the inside of the tunnel as the vehicle moves due to a vehicle fire.

1 Laser radar device (image information acquisition unit)
2 Infrared camera (image information acquisition unit: image acquisition means)
3 Turning mechanism 4 Detection unit 5 Communication unit 6 Case 7 Mounting unit 10 (10A, 10B, 10C ...) Tunnel internal state detection device 20 Monitoring device 21 Communication unit 22 Control unit 30 Display unit 40 Operation unit C Cable T Tunnel L Driving lane W Roadside belt U Ceiling M Vehicle S Tunnel internal condition monitoring system Z Monitoring room

Claims (12)

  An apparatus main body having an image information acquisition unit that acquires image information of an internal state of the tunnel, a detection unit that detects an internal state of the tunnel by image processing from the image information acquired by the image information acquisition unit, and the apparatus main body And a mounting part for attaching the part to a roadside belt in the tunnel.   2. The tunnel internal state detection device according to claim 1, wherein the device main body has a turning mechanism that turns the image information acquisition unit in a horizontal direction within a range of 180 degrees.   The tunnel internal state detection device according to claim 1, wherein the image information acquisition unit is a laser radar device.   The tunnel radar state detection device according to claim 3, wherein the laser radar device has a laser that is eye-safe. 5. The tunnel internal state detection device according to claim 4, wherein the laser radar device has a laser output intensity of 25 W / m ² or less.   6. The tunnel internal state detection device according to claim 4, wherein the laser radar device is an eye-safe band having a laser wavelength of 1.3 μm or more.   The tunnel state detection device according to any one of claims 3 to 6, wherein the laser radar device has a laser radar scanning range set to a maximum height of 4.1 m or more from the roadside band side. .   The tunnel internal state detection device according to any one of claims 3 to 7, wherein the image information acquisition unit includes image acquisition means including a camera having sensitivity to infrared rays.   A tunnel comprising the tunnel internal state detection device according to any one of claims 1 to 8 in a roadside belt.   The tunnel according to claim 9, wherein an installation height of the image information acquisition unit of the tunnel internal state detection device is provided at a position lower than 1 meter.   The tunnel according to claim 9 or 10, comprising a plurality of the tunnel internal state detection devices, wherein each tunnel internal state detection device is installed at predetermined intervals in the tunnel extending direction.   A tunnel internal state monitoring system, wherein the tunnel internal state detection device according to any one of claims 1 to 8 is used to monitor a tunnel internal state.

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