JP2019041862A - Tunnel projection device - Google Patents

Abstract

To provide a tunnel projection device that allows a display of warning and evacuation guidance, etc. in a tunnel to be visually recognized reliably.SOLUTION: A tunnel projection device for projecting a light onto a wall surface of a tunnel includes a projection part 27 disposed so as to be directed to the wall surface of the tunnel, and a disaster prevention reception panel 30 for detecting an occurrence of an abnormality in the tunnel. When an abnormality occurrence in the tunnel is detected by the disaster prevention reception panel 30, the projection part 27 projects a display corresponding to the abnormality that has occurred, onto the wall surface of the tunnel or a road surface.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an intra-tunnel projection device that displays an alarm, evacuation guidance, and the like on a wall surface in a tunnel.

  In tunnels such as motorways, emergency equipment is installed in order to protect people and vehicles from fires occurring in the tunnels. Emergency equipment includes fire detectors that monitor the occurrence of fires, manual notification devices, emergency telephones, fire hydrant devices for extinguishing fires and spreading fires, water spray heads for protecting the inside of tunnels and ducts from fires, etc. have. In addition, the emergency equipment has a disaster prevention reception board that monitors and controls each of the devices.

  In the tunnel, a guidance display board indicating the direction and distance of the tunnel exit and the evacuation communication port, and an alarm display board for displaying an alarm when a fire accident occurs, etc. are also installed. The guidance display board and the alarm display board are installed on the wall of the tunnel. As a tunnel induction installation which provided the induction display board in the tunnel, there exists a thing like patent document 1, for example.

JP, 2017-134631, A

  Since the guidance display board is installed on the wall of the tunnel, the driver of the vehicle heading in the longitudinal direction of the tunnel can not sufficiently view the guidance display board unless there is a vicinity thereof. In addition, the alarm display board disposed so as to go in the traveling direction of the vehicle can not be made so large so as not to hinder the passage of the vehicle. For this reason, when an abnormality occurs in the tunnel, there is a possibility that the driver of the vehicle can not sufficiently view the alarm. In addition, although the fire hydrant arranged in the tunnel also has a display portion for informing its position, since the fire hydrant is arranged on the wall of the tunnel, it is difficult to visually recognize the display portion from the traveling direction of the vehicle.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide an intra-tunnel projection device in which a warning in the tunnel, an indication of evacuation guidance, etc. are largely displayed in the tunnel and can be reliably viewed. Do.

In order to solve the above-mentioned problems, the intra-tunnel projection device according to the invention of claim 1 is an intra-tunnel projection device which projects light onto a wall surface of a tunnel,
A projection unit arranged to face the wall of the tunnel;
And a disaster prevention receiving board for detecting an abnormality occurrence in the tunnel;
When an abnormality occurrence in the tunnel is detected by the disaster prevention receiving board, the projection unit is configured to project a display corresponding to the generated abnormality to a wall surface of the tunnel.

  According to the invention of claim 1, since the display is projected on the wall surface of the tunnel, the color of the wall surface of the tunnel can be changed, and characters, figures, etc. can be displayed in a large size. Etc. can be displayed so that they can be viewed with certainty. If you try to project the display outside the tunnel, it will be projected under sunlight, and this will cause problems such as requiring a very large amount of light or no projection destination, but the inside of the tunnel will be darker than outside the tunnel, In addition, because it is surrounded by a wall, these problems do not occur, and the projection display can be easily viewed.

  In the intra-tunnel projection apparatus according to the second aspect of the present invention, when an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit projects the light so that the wall surface of the tunnel becomes red. It is configured as a feature.

  According to the second aspect of the present invention, when the wall surface of the tunnel becomes red, the person in the tunnel can instantly recognize that an abnormality has occurred.

  Furthermore, in the intra-tunnel projection device according to the invention of claim 3, when the occurrence of an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit generates character information indicating an alarm on a wall surface of the tunnel. It is characterized by projecting a display.

  According to the third aspect of the present invention, since the characters can be displayed large on the wall of the tunnel by the projection unit, reliable information can be transmitted to the person in the tunnel by character information when an abnormality occurs.

  Still further, in the intra-tunnel projection device according to the invention of claim 4, when the occurrence of an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit is a character indicating evacuation guidance to the wall surface of the tunnel It is characterized by projecting the display of information and graphics.

  According to the fourth aspect of the present invention, since characters and figures can be displayed on the wall of the tunnel in a large size by the projection unit, reliable evacuation guidance can be performed.

  Then, in the intra-tunnel projection device according to the invention of claim 5, when the occurrence of an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit is a character indicating the position of the fire hydrant with respect to the wall surface of the tunnel. It is characterized by projecting the display of information and graphics.

  According to the fifth aspect of the present invention, since characters and figures indicating the position of the fire hydrant can be displayed on the wall of the tunnel in a large size by the projection unit, it is possible to reliably inform the person in the tunnel of the position of the fire hydrant.

  Further, in the intra-tunnel projection device according to the invention of claim 6, when the predetermined operation is performed by the fire hydrant, the projection unit projects a display of character information and / or a figure indicating contents to be operated next. It is configured as a feature.

  According to the invention of claim 6, since the display is changed by the projection unit according to the situation, it is possible to promote more accurate action when an abnormality occurs in the tunnel.

  Furthermore, in the in-tunnel projection device according to the invention of claim 7, of the display projected by the projection unit, information for the driver is projected on the ceiling of the tunnel, and information for the person who got out of the vehicle is the above It is characterized in that it is projected onto the side wall of the tunnel.

  According to the seventh aspect of the present invention, it is possible to perform display in accordance with the viewpoint of the viewer, and to improve the visibility of the display.

  Furthermore, the in-tunnel projection device according to the invention of claim 8 is characterized in that the projection unit is disposed on a wall surface of the tunnel or a guard passage.

  According to the eighth aspect of the invention, the projection unit can project the display on any of the ceiling portion, the side wall portion, the guard passage, and the road surface of the tunnel.

  The intra-tunnel projection apparatus according to the invention of claim 9 is provided with a passage detection unit for detecting passage of a car in the tunnel, and the projection unit performs projection while the passage detection unit does not detect passage of the vehicle. It is characterized in that, when the passage detection unit detects that the vehicle is passing, the projection is performed on the wall surface or the road surface of the tunnel.

  According to the invention of claim 9, since the projection is performed only at the necessary timing by the projection unit, the power consumption can be reduced.

  According to the in-tunnel projection apparatus according to the present invention, since the alarm can be displayed largely on the wall surface of the tunnel by the projection unit, a person in the tunnel can surely recognize the alarm etc. when an abnormality occurs.

It is a schematic diagram of a tunnel of a motorway. It is a block diagram of the projection device in a tunnel. It is a figure of the state which changed the color of the wall surface of a tunnel at the time of abnormality generation | occurrence | production by a projection part. It is a figure of the state which is displaying the character on the wall surface of a tunnel at the time of a fire occurrence by the projection part. It is a figure of the state which is displaying the character on the wall surface of a tunnel at the time of abnormality generation | occurrence | production by the projection part. It is a figure of the state which is displaying the character and figure on the wall surface of a tunnel at the time of abnormality generation | occurrence | production by the projection part. It is a figure of the state which is displaying the character and figure in the vicinity of a fire hydrant apparatus at the time of abnormality generation | occurrence | production by the projection part. It is a figure of the state which is performing the display which guides operation of a fire hydrant by projection part. It is a figure of the state which is performing the display which guides the operation after the fire hydrant door is opened from the state of FIG. It is a figure of the state which displayed the distance to the abnormality generation place in the tunnel by the projection part. It is a figure of the state which displayed the character to the effect of traffic congestion in the tunnel by the projection part. It is a figure of the state which displayed the character of the effect of reverse run by the projection part. It is a figure of the state which displayed the ring in the tunnel by the projection part.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic view of a tunnel of a motorway. The tunnel consists of an upstream tunnel A and a downstream tunnel B, both of which are connected by an evacuation contact anti-C. In the tunnel, a guard passage 10 is provided along the road. Further, on the road, emergency parking bands 11 are provided at predetermined intervals, and the width of the tunnel is wide in this part.

  On the wall of the tunnel, the devices that make up the emergency equipment are arranged. The equipment for emergency equipment includes the fire hydrant device 20, the manual notification device 21, the water spray nozzle 22, the emergency telephone 23, the evacuation guidance display plate 24, the alarm display plate 25, the fire detector 26, the projection unit 27, and the camera 28. Is shown in the figure. These devices are provided at predetermined intervals in the tunnel. Each device in the tunnel is connected to a control panel of a single system and a plurality of systems. For the sake of simplicity, these control boards are integrated into a disaster prevention receiving board 30 provided in the monitoring room 15 outside the tunnel. Each system transmits information such as a fire occurrence to the disaster prevention receiving board 30, or performs an operation according to the information received from the disaster prevention receiving board 30. Further, the disaster prevention receiving board 30 transmits various information such as sensor information and camera images to a monitoring center at a remote place, and receives various controls for the camera 28 and the projection unit 27 from the monitoring center.

  The fire hydrant device 20 has a fire hydrant and a hose inside the fire hydrant door 20a that is opened, and may have a fire extinguisher housed therein. The fire hydrant device 20 may also be provided with a manual notification device. The fire hydrant door 20 a can transmit a signal to that effect to the disaster prevention receiving board 30 by switching from the closed state to the open state. The manual notification device 21 is a push-button notification device, and when the button is operated, the information is transmitted to the disaster prevention reception board 30.

  The evacuation guidance display plate 24 is illuminated by light from the inside, and an arrow indicating the evacuation direction, a distance to the evacuation port, and the like are displayed. The alarm display board 25 is installed so as to face the traveling direction of the tunnel, and is an electric light display board for displaying an abnormality in the tunnel.

  The projection part 27 which comprises the projection apparatus in a tunnel is installed in the wall surface of the tunnel, and the guard passage 10. The projection unit 27 is configured of a device such as a projector that can project light. The projection part 27 is arrange | positioned so that the wall surface of a tunnel may be faced, and the light radiate | emitted from the projection part 27 is projected on the wall surface of a tunnel. The light from the projection unit 27 is projected on the wall surface of the tunnel, so that the wall surface of the tunnel can be changed to a predetermined color, and characters and figures can be displayed on the wall surface of the tunnel.

  In the tunnel, cameras 28 are installed at predetermined intervals, and images can be transmitted to the disaster prevention receiving board 30. In the monitoring room 15 where the disaster prevention reception panel 30 is installed, the image from the camera 28 can be viewed, and when reporting from the equipment in the tunnel, the image from the camera 28 confirms what kind of abnormality has occurred. be able to.

  FIG. 2 shows a block diagram of the intra-tunnel projection apparatus. As described above, the fire hydrant door 20 a of the fire hydrant device 20 which is a device disposed in the tunnel, the manual notification device 21, the fire detector 26, and the camera 28 are connected to the disaster prevention receiving board 30. The alarm display board 25 and the projection unit 27 are also connected to the disaster prevention receiving board 30. When receiving information on the occurrence of a fire from each device in the tunnel, the disaster prevention reception board 30 reports the occurrence of a fire to the outside, and performs pump control such as starting operation of a pump that supplies water to the fire hydrant device 20 Send information to the device to

  When an abnormality is detected in each device in the tunnel, the disaster prevention receiving board 30 can cause the alarm display board 25 and the projection unit 27 to display according to the type and place of the abnormality. FIG. 3 shows a state in which the color of the wall of the tunnel is changed by the projection unit 27 when an abnormality occurs. In this figure, the shaded area in the tunnel indicates that the red light from the projection unit 27 is projected. That is, in the present embodiment, the projection unit 27 projects light so that the entire wall surface of the tunnel becomes red. Thus, the driver or the like in the tunnel can instantly recognize that an abnormality has occurred in the tunnel. In addition to this, by causing the alarm display plate 25 to display the occurrence of a fire or the like, the driver or the like can reliably grasp the abnormality in the tunnel.

  The projection unit 27 can not only change the color of the tunnel wall but also project a character or the like. FIG. 4 shows a state in which characters are displayed on the wall of the tunnel at the time of fire occurrence by the projection unit 27. As shown in this figure, the projection unit 27 causes the light emitted to change the wall surface of the tunnel to a red color, and causes the ceiling portion and the side wall portion of the tunnel to largely display the characters “fire occurrence”. Thus, the driver or the like can reliably grasp that a fire has occurred in the tunnel. At this time, it is possible to make the character easy to recognize by making the color projected on the tunnel wall surface different from the color projected as the character, or not projecting the color display on the tunnel wall surface in the vicinity of the character to be projected. desirable. Also, instead of the word "fire occurrence" and in addition to this letter, a figure indicating a fire indication such as a fire mark may be projected.

  A command to project the characters “fire occurrence” by the projection unit 27 is issued from the disaster prevention reception board 30 to the projection unit 27. The command for projecting the characters “fire occurrence” is made to accompany the occurrence of a fire at the disaster prevention receiving board 30. The occurrence of the fire can be made when the disaster prevention receiving board 30 receives the sensing information from the fire detector 26, and the manual notification device 21 located in the tunnel is pressed. In addition, after confirming the image from the camera 28 on the disaster prevention receiving board 30, it may be possible to manually issue a command to project the characters "fire occurrence".

  The projection unit 27 can project characters and the like even when an abnormality other than the occurrence of a fire occurs. FIG. 5 shows a state in which characters are displayed on the wall of the tunnel when an abnormality occurs by the projection unit 27. As shown in this figure, the projection unit 27 causes the light of the emitted light to change the wall surface of the tunnel to red, and causes the ceiling portion and the side wall portion of the tunnel to display the characters “accident occurrence” in a large size. Thus, the driver or the like can reliably grasp that an accident has occurred in the tunnel.

  A command for projecting the characters “accident occurrence” by the projection unit 27 is issued from the disaster prevention reception board 30 to the projection unit 27. The command to project the characters of "accident occurrence" may be automatically output from the disaster prevention receiving board 30 when there is a notification from the manual notification device 21 in the disaster prevention receiving board 30, or the manual notification apparatus If there is a notification from S.21, the image from the camera 28 may be confirmed on the disaster prevention receiving board 30, and then the command may be issued manually. At this time, the distance between the accident occurrence location and the current position may be displayed together.

  The projection unit 27 can display a figure on the wall of the tunnel in addition to the characters. FIG. 5 shows a state in which characters and figures are displayed on the wall surface of the tunnel when an abnormality occurs by the projection unit 27. As shown in FIG. As shown in this figure, the projection unit 27 changes the wall surface of the tunnel to red by the emitted light, and also displays the character of “evacuation” and an arrow indicating the direction toward the exit 12 on the side wall of the tunnel. Make it bigger. Thereby, a driver etc. can grasp the direction and position of evacuation port 12 certainly in a tunnel. The letters and arrows of “evacuation” can be strongly urged to evacuate the person in the tunnel by repeating flashing.

  In FIG. 5, the characters “evacuation” and an arrow indicating the direction toward the evacuation port 12 are displayed on the side wall of the tunnel, but these are displayed together with the characters “accident occurrence” as shown in FIG. You may In addition, the instruction to display the character of “evacuation” and the arrow indicating the direction toward the evacuation port 12 by the projection unit 27 is a case where the notification from the manual notification device 21 is received in the disaster prevention reception board 30 or the fire hydrant door 20 a May be automatically output when the fire detector 26 detects the occurrence of a fire when it is detected that the camera has been opened, or after confirming the image from the camera 28 at the time of these detections. It may be issued manually.

  There are various other indications on the wall of the tunnel by the projection unit 27. FIG. 6 shows a state in which characters and figures are displayed near the fire hydrant device 20 by the projection unit 27 when an abnormality occurs. As shown in this figure, the projection unit 27 causes the light of the light to change the wall surface of the tunnel to red, and causes the letters and arrows of “fire hydrant” to be displayed in a large size directly above the fire hydrant device 20. Thereby, a driver etc. can grasp the position of fire hydrant device 20 certainly in a tunnel.

  The display by the projection unit 27 can also be changed according to the situation. FIG. 7 shows a state in which a display for guiding the operation of the fire hydrant device 20 by the projection unit 27 is performed. When there is a fire detection by the fire detector 26 or a notification by the manual notification device 21, the disaster prevention receiving board 30 causes the projection unit 27 to project the display as shown in FIG. 7 at a position immediately next to the fire hydrant device 20. The display here urges the fire hydrant door 20 a of the fire hydrant device 20 to be opened. By this display, it is possible to instantly grasp the position of the fire hydrant device 20 and which part to operate.

  When the fire hydrant door 20a is opened from the display state of FIG. 7, the disaster prevention receiving board 30 which has detected the signal to that effect subsequently causes the projection unit 27 to project the display shown in FIG. The display here urges the nozzle 20b of the fire hydrant device 20 to be taken out. By this display, after the fire hydrant door 20a is opened, it can be surely grasped how to operate.

  Furthermore, the removal of the nozzle 20b can be detected, and when the nozzle 20b is removed, the display of the projection unit 27 can be further changed to display "Please pull the lever" or the like. As described above, by changing the display by the projection unit 27 at each stage of the operation of the fire hydrant device 20, the operation of the fire hydrant device 20 can be guided. Further, by changing the display by the projection unit 27 according to the situation, it is possible to promote more accurate action when an abnormality occurs in the tunnel.

  Another display can also be performed in the projection unit 27. FIG. 9 shows a state in which the projection unit 27 displays the distance to the abnormality occurrence point in the tunnel. The disaster prevention receiving board 30 can recognize from which device the notification from the manual notification device 21 and the fire detection by the fire detector 26 are performed. Then, as shown in FIG. 9, the disaster prevention receiving board 30 causes the projection unit 27 to project the distance to the device in which the abnormality is detected. In FIG. 9, distances are displayed at points of 500 m, 400 m, and 300 m, respectively, to the device at which the abnormality is detected. Thus, the driver or the like can easily grasp the distance to the position where the abnormality has occurred.

  In addition, in the situation other than the time of abnormality occurrence in the tunnel, it is possible to make the projection section 27 project characters and the like. FIG. 10 shows a state in which the projection unit 27 displays characters indicating that traffic is in traffic in the tunnel. As shown in this figure, when traffic congestion occurs in the tunnel, the driver's attention is given by causing the projection unit 27 to project the letters “in traffic congestion” and “front caution” largely on the wall of the tunnel. Prompt and prevent collisions.

  FIG. 11 shows a state in which the character indicating reverse running is displayed by the projection unit 27. As shown in FIG. When a car traveling backward in the tunnel enters, it is possible to make the driver recognize that the driver is traveling backward by causing the projection unit 27 to largely project the characters “reverse!” On the wall surface of the tunnel. And prevent accidents. The detection of a reverse vehicle is performed by a change in position of the vehicle at different times in the image of the camera 28 or a known speed detection of the vehicle.

  FIG. 12 shows a diagram in which the projection unit 27 displays a ring in the tunnel. As shown in this figure, the projection unit 27 can display a plurality of rings along the longitudinal direction in the tunnel. These rings are designed to become progressively lighter in color from the front to the back in the figure. Thereby, the driver in the tunnel can be urged to decelerate. In addition, if the color of the ring is displayed to be gradually darkened from the front to the back, the driver in the tunnel can be urged to accelerate. Such ring display can alleviate congestion in the tunnel.

  Although various displays by the projection unit 27 have been described so far, among the displays, it is preferable that the display for the person in operation is displayed at a high position such as the ceiling of a tunnel for better visibility. On the other hand, it is preferable to display the display for the person who got off the car, specifically, the person in evacuation or the person who uses the fire hydrant device 20 at a low position such as a side wall of the tunnel without looking up.

  The projection unit 27 can be installed near the entrance of the tunnel. Since light from the outside of the tunnel enters near the entrance of the tunnel, it is desirable to be able to emit stronger light than the projection unit 27 installed on the far side of the tunnel. It is preferable that the display in the vicinity of the entrance of the tunnel is performed by displaying an entry prohibition mark on the road surface so that it can be noticed immediately before or after entering the tunnel.

  When an abnormality occurs in the tunnel, as described above, the projection unit 27 projects red light so that the wall of the tunnel becomes red, but may project another color depending on the situation. For example, based on the color alert standard of JIS standard, green represents safety, yellow represents red, yellow red represents hazard, and extinguish or stop. You may project red, respectively.

  The projection unit 27 may display information different from the abnormality display at the normal time (not abnormal time). For example, construction information displayed on a light bulletin board or the like, information to the next parking area, and the like may be displayed.

  The color of the tunnel wall may be displayed gradually as time passes. For example, a plurality of color display lines may be prepared, and the intervals between the lines may be gradually narrowed. As a result, the color of the wall surface suddenly changes, so that it is possible to prevent an accident associated with a sudden braking caused by the driver being surprised.

  The display by the projection unit 27 may be performed when the emergency vehicle is approaching. Since it is difficult to hear the siren sound of the emergency vehicle in the tunnel, awareness by display is effective.

  The display by the projection unit 27 may be performed only at a necessary timing. The necessary timing is, for example, when a car has passed. For this purpose, a passage detection unit capable of detecting the passage of a vehicle is provided in the tunnel, and the display / non-display of the projection unit 27 is switched depending on the presence / absence of passage detection of the vehicle by the passage detection unit. Specifically, the projection unit 27 does not perform projection while the passage detection unit does not detect passage of a car, and when the passage detection unit detects passage of a vehicle, the projection unit 27 is determined with respect to the tunnel wall surface or road surface. Project the Thereby, power consumption in the projection unit 27 can be suppressed. In addition, the projection unit 27 can be protected by a cover or the like at the time of non-projection, and can be exposed only at the time of projection to emit light. In this case, it is possible to prevent the contamination of the projection unit 27 by performing the projection only when the passage of the vehicle is detected.

  Although the display by the projection unit 27 is projected on the wall surface of the tunnel, it may be projected on the road surface of the tunnel. In this case, the projection unit 27 is installed at a high place in the tunnel.

  As mentioned above, although embodiment of this invention was described, application of this invention is not restricted to this embodiment, It can be variously applied within the range of the technical thought.

A uphill tunnel B downhill tunnel C evacuation contact anti-10 guard passage 11 emergency parking zone 12 evacuation port 20 fire hydrant device 21 manual notification device 22 water spray nozzle 23 emergency telephone 24 evacuation guidance display board 25 alarm display board 26 fire detector 27 projection unit 28 camera 30 disaster prevention receiver board

Claims (9)

An intra-tunnel projection device that projects light onto the wall of the tunnel,
A projection unit arranged to face the wall of the tunnel;
And a disaster prevention receiving board for detecting an abnormality occurrence in the tunnel;
When an abnormality occurrence in the tunnel is detected by the disaster prevention receiving board, the projection unit projects a display corresponding to the generated abnormality onto a wall surface or a road surface of the tunnel. apparatus.   The in-tunnel projection according to claim 1, wherein when the occurrence of an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit projects light so that a wall surface of the tunnel becomes red. apparatus.   3. The apparatus according to claim 1, wherein when the occurrence of an abnormality in the tunnel is detected by the disaster prevention receiving board, the projection unit projects a display of character information indicating an alarm on a wall surface of the tunnel. In-tunnel projection device as described.   When an abnormality occurrence in the tunnel is detected by the disaster prevention receiving board, the projection unit projects a display of character information and / or a figure indicating evacuation guidance on a wall surface of the tunnel. The intra-tunnel projection device according to any one of Items 1 to 3.   When the abnormality occurrence in the tunnel is detected by the disaster prevention receiving board, the projection unit projects the display of the character information and / or the figure indicating the position of the fire hydrant to the wall surface of the tunnel. The intra-tunnel projection device according to any one of claims 1 to 4.   The in-tunnel projection device according to claim 5, wherein the projection unit projects a display of character information and / or a figure indicating contents to be operated next, when a predetermined operation is performed by the fire hydrant. .   In the display projected by the projection unit, the information for the driver is projected on the ceiling of the tunnel, and the information for the person who got out of the car is projected on the sidewall of the tunnel. The intra-tunnel projection device according to any one of 1 to 6.   The in-tunnel projection device according to any one of claims 1 to 7, wherein the projection unit is disposed on a wall surface or a guard passage of the tunnel.   A passage detection unit for detecting passage of a car is provided in a tunnel, and the projection unit does not perform projection while the passage detection unit does not detect passage of a vehicle, and the passage detection unit detects passage of a vehicle The in-tunnel projection device according to any one of claims 1 to 8, wherein the projection is performed on a wall surface or a road surface of the tunnel.

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