JPH11120457A - Tunnel disaster preventing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly execute the extinguishing activity of a fire and the evacuation guidance activity of survivors by visually displaying a temperature distribution situation in a tunnel based on temperature information from a temperature sensor measuring the temperature in the tunnel at the time of the fire. SOLUTION: An optical fiber temperature measuring system 17 which is comprehensively arranged in a tunnel 10 over the full length of the tunnel 10 to measure a temperature distribution in the tunnel 10 is provided. This tunnel disaster preventing system is additionally provided with a carbon monoxide (CO) density measuring system 19 and a visibility (VI) distance measuring system 20 measuring visibility. Then, temperature information in the tunnel 10 measured by an optical fiber temperature measuring system 17, CO density information measured by the CO density measuring system 19 and VI distance information measured by the system 20 are sent to a remote managing center. The manager of the center 22 displays the video of a monitoring camera system on a screen at need and displays a temperature distributing situation in the tunnel 10 on the screen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention system for a tunnel capable of grasping a fire situation in a tunnel through which, for example, automobiles and other vehicles and pedestrians pass.

[0002]

2. Description of the Related Art When a fire occurs in a tunnel, it is important to grasp the state of the fire in the tunnel. If the fire situation can be accurately grasped, the fire extinguishing activities can be made more efficient and the fire can be minimized, and people left in the tunnel can be evacuated accurately. .

In a conventional tunnel disaster prevention system,
In order to grasp the fire situation in the tunnel, surveillance cameras have been installed at multiple locations inside the tunnel to monitor the actual situation inside the tunnel.

[0004]

However, when a surveillance camera is used, if a fire occurs and the view of the surveillance camera is obstructed by smoke or the like, the situation inside the tunnel may not be understood at all. . In addition, when gas that harms humans is generated in the tunnel, it cannot be confirmed by the monitoring camera.

[0005] As described above, if the situation in the tunnel cannot be accurately grasped, there is a risk that the evacuation guidance of humans in the tunnel will be hindered and the fire extinguishing activities will be delayed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a tunnel fire system capable of accurately grasping the situation in a tunnel without being affected by smoke or the like.

[0007]

Means for Solving the Problems In order to solve the above problems, the present invention has taken the following means.

According to a first aspect of the present invention, there is provided a temperature sensor for measuring a temperature in a tunnel, and display means for visually displaying a temperature distribution state in the tunnel based on temperature information measured by the temperature sensor at the time of fire. Is adopted.

According to this configuration, the temperature condition in the tunnel at the time of a fire can be visually reproduced without being affected by smoke or the like in the tunnel. In particular, in order to improve the visual effect, it is preferable that the temperature distribution state is displayed as a three-dimensional image on the display screen.

According to a second aspect of the present invention, there is provided a gas concentration sensor for measuring a gas concentration in a tunnel, and a gas concentration distribution state in the tunnel based on gas concentration information measured by the gas concentration sensor in a fire. And a display means for displaying.

According to this configuration, it is possible to visually reproduce the gas concentration state in the tunnel at the time of fire without being affected by smoke or the like in the tunnel. In this case, since it is possible to know the distribution state of the gas concentration and the distribution state of the smoke, it is possible to identify a safe section. In particular, in order to improve the visual effect, it is preferable that the gas concentration distribution status be displayed on the display screen as a three-dimensional image.

According to a third aspect of the present invention, a visibility distance measurement sensor for measuring a visibility distance in a tunnel, and a visibility distance measurement state in the tunnel based on visibility distance measurement information measured by the visibility distance measurement sensor during a fire. And a display means for visually displaying.

According to this configuration, it is possible to visually reproduce the visibility distance situation in the tunnel at the time of fire without being affected by smoke and the like in the tunnel. In particular, in order to improve the visual effect, it is preferable that the visibility distance state be displayed as a three-dimensional image on the display screen.

According to a fourth aspect of the present invention, there is provided a vehicle recognition system for recognizing a traffic condition of a vehicle in a tunnel based on information on a license plate of a vehicle passing in the tunnel, and a vehicle presence status recognized by the vehicle recognition system in a fire. And a display means for visually displaying.

According to this configuration, it is possible to visually reproduce the vehicle presence state in the tunnel at the time of fire without being affected by smoke or the like in the tunnel. In particular, in order to improve the visual effect, it is preferable that the vehicle presence status is displayed as a three-dimensional image on the display screen.

By properly combining the inventions described in claims 1 to 4, the inside of the tunnel can be reproduced with higher accuracy.

According to the invention described in claim 5, according to claim 1,
The display means is selected from the group consisting of a temperature distribution state, a visibility distance, a gas concentration distribution state, and a vehicle traffic state for each of the plurality of divided tunnel sections. A configuration for displaying at least one is adopted.

According to this configuration, the tunnel section where the fire has occurred and the tunnel section near the tunnel section can be extracted and the situation can be individually grasped.

Preferably, the display means displays the number of vehicles for each tunnel section.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the display means includes:
A configuration is adopted in which a fire spread direction of a fire is predicted based on at least one of the change in the temperature distribution state and the change in the gas concentration distribution state, and the fire spread direction is displayed.

According to this configuration, fire extinguishing activities and evacuation guidance can be performed prior to the spread of fire, and damage can be minimized.

According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, a human detection system is provided at an emergency exit installed in a tunnel and detects a human passing through the emergency exit. And the display means is configured to display information from the human detection system.

According to this configuration, it is possible to recognize at which emergency exit a human is evacuated. Thereby, it is possible to confirm whether the evacuation guidance is being performed appropriately.

According to a ninth aspect of the present invention, in the first aspect of the present invention, the display means includes:
A configuration is adopted in which at least one of the temperature distribution state and the gas concentration distribution state is displayed as a three-dimensional image.

According to this configuration, the situation in the tunnel can be reproduced more realistically and accurately.

According to a tenth aspect of the present invention, in the first aspect of the present invention, the temperature distribution status, the gas concentration distribution status, the visibility distance, the vehicle traffic status, and the information from the human detection system. A configuration is employed in which a person in a tunnel is evacuated and guided based on at least one piece of information selected from a group consisting of information.

According to this configuration, it is possible to guide the people in the tunnel to the emergency passage more safely.

[0028]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of a tunnel to which a tunnel disaster prevention system according to the present invention is applied.
The tunnel 10 has an entrance 11 through which vehicles enter the tunnel 10 and an exit 1 through which vehicles exit the tunnel 10.
2 to form a one-way vehicle-only road. The vehicle exclusive road may include a plurality of vehicle traffic lanes.
In front of the entrance 11, a bulletin board 14 for displaying a traffic condition in the tunnel 10 and an alarm display is installed. This bulletin board 1
A plurality of 4 may be installed such as 1 km or 2 km before the entrance.

The tunnel 10 has an emergency passage 1 for pedestrians only.
5 are formed. If this emergency passage 15 is used, the pedestrian can go to the ground without using the entrance 11 and the exit 12 of the tunnel 10. Such emergency passages 15 are preferably provided at predetermined intervals in the tunnel 10. In addition, the emergency passage 15 may communicate with an emergency pit (not shown) formed in parallel with the tunnel 10.

The tunnel 10 is provided with a tunnel disaster prevention system according to the present invention. This tunnel disaster prevention system is provided with an optical fiber temperature measurement system 17 that covers the entire length of the tunnel 10 and measures the temperature distribution in the tunnel 10. At each measurement point of the optical fiber temperature measurement system 17, a mercury lamp 18 is installed. The measurement points are at equal intervals, for example,
It is preferable that the measurement points be provided over the entire length of 0, and that a plurality of measurement points be provided in the width direction of the tunnel 10 as much as possible. Such an optical fiber temperature measurement system 17 is laid on the inner wall surface of the tunnel 10 through an arbitrary tunneling method.

The tunnel disaster prevention system further includes a carbon monoxide (CO) concentration measuring system 19 for measuring the concentration of gas, for example, carbon monoxide, in the tunnel 10 over the entire length of the tunnel 10, and a carbon monoxide (CO) concentration measuring system 19 for measuring the gas concentration in the tunnel 10 over the entire length of the tunnel 10. And a visibility (VI) distance measurement system 20 for measuring visibility. The CO concentration measurement system 19 measures the CO concentration at each measurement point using a CO sensor 19a installed for each measurement point. The VI distance measurement system 20
Similarly, the VI distance of each measurement point is measured by the VI sensor 20a installed for each measurement point. In any of the systems 19 and 20, a plurality of measurement points may be set at equal intervals, for example, 5 m, in the entire length direction of the tunnel 10 as in the case of the mercury lamp 18 of the optical fiber temperature measurement 17 system.

The temperature information in the tunnel 10 measured by the optical fiber temperature measuring system 17, the CO concentration information measured by the CO concentration measuring system 19, and the VI distance information measured by the VI distance measuring system 20 are remotely managed. Center 2
It is sent to 2. A data communication path is established between the tunnel 10 and the management center 22 by wire, wirelessly, or a combination thereof.

FIG. 2 shows one section 10a of the tunnel 10 sectioned along the entire length direction (dotted area in FIG. 1).
Is shown. As shown in FIG. 2, a pedestrian-only passage 24 is formed adjacent to the vehicle traffic lane 23 in the tunnel 10. These pedestrian passages 24 are curved (stepped).
This completely separates the vehicle from the vehicle lane 23. The pedestrian can reach the entrance 25 of the emergency passage 15 along the pedestrian passage 24.

An emergency door 26 is provided at the entrance 25 of the emergency passage 15. The opening of the emergency door 26 is performed by the emergency door sensor 2
7, and the detection signal is sent to the management center 22. The storage box 29 in which the fire extinguisher 28 is stored includes
A fire extinguisher door sensor 30 for detecting that the door of the storage box 29 has been opened is provided. The detection signal of the fire extinguisher door sensor 30 is similarly sent to the management center 22. Further, a fire hydrant 31 is installed in the tunnel 10. When the fire alarm button 32 attached to the fire hydrant 31 is pressed, a fire alarm signal is sent to the management center 22.

A surveillance camera 34 is provided on the ceiling of the tunnel 10.
Is installed. The monitoring camera 34 captures an image of the inside of the tunnel 10 and supplies the captured image to the management center 22. It is preferable that the surveillance camera 34 projects the entire section 10a using a wide-angle lens or a swing motion. A plurality of surveillance cameras 34 cooperate to configure a surveillance camera system of the tunnel disaster prevention system. Surveillance camera 34
And the number (that is, the installation intervals) of the monitoring cameras 34 may be determined in accordance with the photographable area of each monitoring camera 34.

A vehicle identification camera 35 for obtaining a vehicle number from a license plate of a passing vehicle is installed on the ceiling surface of the tunnel 10. The acquired license plate information is sent to the management center 22. A plurality of vehicle identification cameras cooperate to configure a vehicle identification (AVI) system. According to the AVI system, the number of passing vehicles, the passing speed of the passing vehicles, and the position information of a specific passing vehicle can be obtained.

A sprayer 36 and a broadcast speaker 37 are further provided on the ceiling surface of the tunnel 10. Nebulizer 36
Discharges water toward a road surface according to a command from the management center 22. Broadcast speaker 37 outputs sound sent from management center 22.

FIG. 3 is a block diagram showing a schematic configuration of the tunnel disaster prevention system of the present invention. In the management center 22,
A control unit 40 that performs various operations of the tunnel disaster prevention system is installed. The control unit 40 includes temperature information, CO concentration information, VI distance information sent to the management center 22, image information from the surveillance camera system 41, license plate information from the AVI system 42, fire recognition means 43 Fire alarm information is supplied. As the fire recognition means 43, in addition to the above-described emergency door sensor 27, fire extinguisher door sensor 30, and fire alarm button 32, a fire detector, an emergency telephone door open sensor, and a fire hydrant door open sensor may be provided. Good. Either method is sufficient to assist in recognizing a fire.

The control unit 40 operates according to a program stored in the memory 45. The result of the operation and the processing result of the supplied various information are displayed on the display screen of the display device 46. By using the input device 47, the user controls the switching of the display screen, the support operation for the operation of the control unit 40, the operation command of the sprayer 36, the operation of the loudspeaker broadcasting system 48, and the operation of the radio rebroadcast system 49. be able to. The control unit 40,
The memory 45, the display device 46, and the input device 47 may be configured by a computer system.

The control unit 40 is further connected with an LED guidance system 51 and a human detection system 52.
The LED guidance system 51 includes an LED row 54 laid in the pedestrian-specific passage 24, as shown in FIG. LE
When each LED 55 in the D row 54 blinks, the person in the tunnel 10 is guided to the entrance 25 of the emergency passage 15 or the entrance 11 or the exit 12 of the tunnel 10.

On the other hand, the human detection system 52 includes an infrared strobe 5 installed at an arbitrary interval in the emergency passage 15.
6 or a continuous illuminator. Since the strobe light and the continuous light are blocked by a passing person, the moving state of the person can be detected by observing the blocked state. Thereby, it is possible to confirm whether the evacuation guidance is being properly performed.

Next, the operation of the tunnel disaster prevention system will be described. First, in a normal monitoring system, the control unit 40
As shown in FIG. 5, for example, a plurality of tunnels 61, 6
A wide-area map 64 that can specify 2, 63 is displayed on the display screen of the display device 46. Such a wide area map 6
4 is stored in the memory 45 in advance.

The administrator of the management center 22
The video of the surveillance camera system 41 can be displayed on the screen. The input device 47 may be used to switch the screen display. The display screen includes a plurality of surveillance cameras 34.
May be displayed at the same time. Each surveillance camera 34 is given a unique identification number, and the administrator selects a specific video based on the identification number.

The manager of the management center 22 can display the temperature distribution in the tunnel 10 on the screen as needed. Input device 4 for switching screen display
7 may be used. In a normal monitoring system, the temperature distribution state is created in a relatively long measurement cycle. The temperature information from all the measurement points is processed by the control unit 40 and displayed three-dimensionally on the display screen.

Here, the three-dimensional data of the tunnel 10 is stored in the memory 45 in advance. The position data of all measurement points set in the optical fiber temperature measurement system 17, the CO concentration measurement system 19, and the VI distance measurement system 20 are associated with the three-dimensional data. The measurement result of each measurement point is associated with the corresponding three-dimensional position data. As a result, as shown in FIG. 7, the distribution status of the temperature, the CO concentration, and the VI distance is displayed on the display screen by using the density of the color.

In this normal monitoring system, as shown in FIG. 6, it is preferable that the AVI system 42 always calculate the average speed and the number of vehicles of each type of vehicles passing through each tunnel section. The average speed is 40 km in the section 10b and 30 in the section 10c using the three-dimensional image of the tunnel 10.
It is displayed together with the traveling direction, such as km. The average speed of the vehicle group may be calculated from the elapsed time until a vehicle that has passed through one vehicle identification camera 35 passes through the next vehicle identification camera 35. Similarly, the number of vehicles is displayed such as 5 in the section 10b and 12 in the section 10c. Since the license plate of the vehicle is used to identify the vehicle, by tracking the movement of the license plate, the entrance 11 of the tunnel 10 to the exit 1
Up to two pieces of vehicle position information can be acquired.

When the fire notification information is sent from the fire recognition means 43, the control unit 40 specifies the tunnel based on the fire notification information and changes the color of the corresponding tunnel on the wide area map 64. By this discoloration, the manager of the management center 22 knows the tunnel where the fire has been notified.

At this time, the administrator can switch the screen display to the video from the monitoring camera 34 and check whether or not a fire has occurred. To that end, the control unit 40
Based on the position information included in the fire notification information, it is preferable to narrow down a tunnel section where a fire is expected to occur (fire spread), and display an image around the narrowed tunnel section on a display screen. Thus, fire extinguishing activities and evacuation guidance can be performed prior to the spread of the fire, and damage can be minimized.

In addition, such confirmation makes it possible to discriminate false reports of fire notification. If there is a fire,
The administrator can check the fire spot, the damage situation, and the blaming situation through the video.

The administrator may switch the screen display to the temperature distribution of the tunnel 10 to check whether a fire has occurred. If a fire has occurred, a place where the temperature is rapidly rising or a place where the temperature is higher than usual will be confirmed.

The administrator who has confirmed the occurrence of the fire subsequently reports the occurrence of the fire. First, a warning display of "Fire occurrence: entry into a tunnel prohibited" is displayed on the bulletin board 14 through the operation of the input device 47. In addition, the radio rebroadcast system 49
, And the confirmed fire spots and damage status are repeatedly broadcast on a specific frequency. In this way, the new vehicle is in tunnel 1
Prevent entry into zero. Further, it is possible to use the loudspeaker broadcasting system 48 to prevent a vehicle in the tunnel 10 from approaching a fire spot.

Following such initial notification, the manager performs fire extinguishing activities and evacuation guidance. Therefore, according to this tunnel disaster prevention system, the fire situation is clearly reproduced on the screen.

First, the administrator determines the temperature at each measurement point,
The latest information of the temperature change rate, the CO concentration, and the VI distance is obtained through the control unit 40. From the time of acquiring the latest information, a short measurement cycle shorter than the measurement cycle of the normal monitoring system is set. Here, it is preferable to improve the distance resolution. For example, in a normal monitoring system, measurement points are selected at intervals of 25 m along the entire length of the tunnel 10, and after recognition of a fire, measurement points are selected at intervals of 5 m along the entire length of the tunnel 10. With such improved distance resolution,
The detailed temperature distribution status narrowed down to the fire spot can be obtained.

Upon receiving the temperature information, the control unit 40 displays the temperature distribution in the tunnel 10 three-dimensionally on the display screen as shown in FIG. According to this screen display, the area heated by the fire is shown,
The temperature change rate of each tunnel section is shown. Here, an increase in temperature is indicated by an upward triangle, and a decrease in temperature is indicated by a downward triangle. The number of triangles indicates the degree of the change rate. For example, in FIG. 7, it can be seen that the temperature rise rate of the section 10b is large and the temperature decrease rate of the section 10d is relatively large. The administrator can know the fire occurrence point 71 and the spread 72 of the fire by knowing the temperature distribution. Also, the temperature change rate is a valuable data for knowing the direction of fire spread. Such information may be provided to fire fighters (firefighters) who rushed to the fire site. As a result, safer fire fighting activities can be supported.

To display the temperature distribution, the CO concentration distribution and VI
The distance distribution may be displayed together. By using these distribution displays, not only can the fire situation be confirmed more reliably, but also the distribution of fire smoke can be known. As a result, based on such information, the environment in the tunnel can be identified as shown in FIG. For example, an area where the CO concentration is high is set to be excluded from the safety section. In FIG. 8, a viable section is marked with a circle, a dangerous section is marked with a triangle, and a non-viable section is marked with an X.

By clearly grasping the fire situation as described above, fire extinguishing activities can be made more efficient and fires can be minimized. That is, the manager who has grasped the fire situation specifies the section where the fire is spreading, or specifies the direction of the fire spread, so that the sprayer 36 can be positioned at the optimum position.
Can be operated. At this time, the water discharge state of the sprayer 36 may be displayed so as to be superimposed on the three-dimensional display of the temperature distribution.

Understanding the fire situation is also useful for evacuation guidance. That is, the person in the tunnel 10 is guided toward the emergency passage existing in the safety section. These leads include
The loudspeaker broadcasting system 48 and the LED guidance system 51 are used. The evacuation status by the guidance is grasped by the human detection system 52.

When the occurrence of a fire is recognized, the AVI system 42 is used to grasp the congestion state of the tunnel section based on the number of vehicles in each tunnel section and to predict the flow of traffic based on the average speed. It becomes possible. During fire fighting and evacuation guidance, the AVI system 4
As shown in FIG. 9, it is possible to specify the moving state of the vehicle in the tunnel 10 and the vehicle existing in the tunnel 10 by using the information 2. As a result, for example, it is possible to efficiently guide the rescue vehicle. Further, based on the license plate information, it is possible to specify the location of a patrol car, a fire engine and a patrol car of the Public Corporation.

In this case, since the vehicle is recognized by the license plate, it is possible to identify a large vehicle or a small vehicle. That is, the number of large vehicles and the number of small vehicles can be classified and the number of vehicles can be recognized for each tunnel section.

When the fire subsides, the tunnel disaster prevention system returns to the normal monitoring operation. Normally, in a post-fire process, for example, even for a vehicle that cannot be identified due to a fire, the AVI system 42 can identify the vehicle based on the license plate (see FIG. 9).

In the above-described embodiment, the tunnel disaster prevention system according to the present invention is applied to a one-way vehicle exclusive road. However, the tunnel disaster prevention system according to the present invention may be applied to a bidirectional vehicle exclusive road. In that case, it is necessary to adjust the direction of the vehicle identification camera 35 and the position of the bulletin board 14 according to the traveling direction of the vehicle. Further, the tunnel disaster prevention system according to the present invention may be applied to a tunnel in which a pedestrian or a bicycle can run together with a vehicle, or a tunnel dedicated to a pedestrian or a bicycle.

[0063]

As described above, according to the present invention, the inside of the tunnel can be reliably reproduced as a screen display based on the temperature distribution in the tunnel and the like. As a result, it is possible to smoothly carry out fire extinguishing activities and activities to guide survivors to blame.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire structure of a tunnel to which a tunnel disaster prevention system according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing a state in which one section of a tunnel is cut out and the inside of the tunnel is cut out.

FIG. 3 is a block diagram showing a configuration of a tunnel disaster prevention system according to one embodiment.

FIG. 4 is an enlarged perspective view near an emergency passage in a tunnel.

FIG. 5 is a diagram showing a screen display example of a wide area map.

FIG. 6 is a diagram showing an example of a screen display relating to an average vehicle speed and the number of vehicles in each tunnel section.

FIG. 7 is a diagram showing an example of a screen display relating to a temperature distribution and a temperature change rate for each tunnel section.

FIG. 8 is a diagram showing an example of a screen display related to an environment in a tunnel for each tunnel section.

FIG. 9 is a diagram showing an example of a screen display related to vehicles existing in each tunnel section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Tunnel 17 Optical fiber temperature measuring system (optical fiber thermometer) 18 Mercury lamp 19a Oxygen monoxide (CO) concentration sensor 20a Visibility (VI) distance measuring sensor 25 Emergency passage entrance 42 Vehicle identification (AVI) system 46 Display device 51 LED guidance System 52 Human detection system

Claims (10)

[Claims] 1. A temperature sensor for measuring a temperature in a tunnel, and display means for visually displaying a temperature distribution state in the tunnel based on temperature information measured by the temperature sensor during a fire. Tunnel disaster prevention system. 2. A gas concentration sensor for measuring a gas concentration in a tunnel, and display means for visually displaying a gas concentration distribution state in the tunnel based on gas concentration information measured by the gas concentration sensor at the time of fire. A disaster prevention system for a tunnel, comprising: 3. A visibility distance measuring sensor for measuring a visibility distance in a tunnel, and a display means for visually displaying a visibility distance measurement status in the tunnel based on visibility distance measurement information measured by the visibility distance measurement sensor in a fire. And a tunnel disaster prevention system comprising: 4. A vehicle recognition system for recognizing a vehicle traffic situation in a tunnel based on information on a license plate of a vehicle passing in the tunnel, and a display means for visually displaying a vehicle presence situation recognized by the vehicle recognition system in a fire. And a tunnel disaster prevention system comprising: 5. The display means displays at least one selected from the group consisting of a temperature distribution state, a visibility distance, a gas concentration distribution state, and a vehicle traffic state for each of the plurality of divided tunnel sections. The tunnel disaster prevention system according to any one of claims 1 to 4, wherein: 6. The disaster prevention system according to claim 5, wherein the display means displays the number of vehicles for each tunnel section. 7. The display means predicts a fire spread direction based on at least one of a change in a temperature distribution state and a change in a gas concentration distribution state, and displays the fire spread direction. The tunnel disaster prevention system according to any one of claims 1 to 6. 8. A human detection system provided at an emergency exit installed in a tunnel and detecting a human passing through the emergency exit, wherein the display means displays information from the human detection system. The tunnel disaster prevention system according to any one of claims 1 to 7. 9. The tunnel disaster prevention system according to claim 1, wherein the display means displays at least one of a temperature distribution state and a gas concentration distribution state in a three-dimensional image. 10. Evacuation guidance for a person in a tunnel based on at least one information selected from the group consisting of a temperature distribution state, a gas concentration distribution state, a visibility distance, a vehicle traffic state, and information from a human detection system. The tunnel disaster prevention system according to any one of claims 1 to 9, wherein: