Lighting control device, lighting system, and program

Abstract

To make clearly visible an abnormality that occurs per se.SOLUTION: A sensor 2 is a camera monitoring a passage, a smoke sensor, a flame sensor, etc., and transmits information indicating sensed results to a light projection control device 1. A detection section 111 receives the information from the sensor 2 and, based on the information, detects an abnormality that occurs in the passage. In a case where the detection section 111 detects the occurrence of an abnormality, an identification section 112 identifies a position where the abnormality occurs. A light projection control section 113 estimates the kind of the abnormality detected by the detection section 111 and the degree of the abnormality. The light projection control section 113 then refers to a mode table 122 to determine a mode ID corresponding to the estimated kind and degree of the abnormality. The light projection control section 113 then issues an instruction to a light projector 3 identified by a reported light projector ID so as to project light toward the position, where the abnormality occurs, in a mode identified by the determined mode ID.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a technique for notifying an occurrence of an abnormality by light in a place with low light quantity such as inside a tunnel.

Background Art

[0002] As patent documents disclosing a technique for notifying an occurrence of an abnormality in a tunnel or the like by light, for example, there are Patent Document 1 or Patent Document 2. Patent Document 1 discloses a tunnel projection device that enables visual recognition of alarms, evacuation guidance displays, etc. inside a tunnel. Patent Document 2 discloses a lighting system that suppresses the entry of vehicles into a tunnel when an abnormality occurs.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the techniques described in these Patent Documents 1 and 2 use light to warn other vehicles when an abnormality occurs, or provide information for promoting abnormality countermeasures such as fire - fighting activities. However, these techniques do not clearly show the occurrence of the abnormality itself.

Means for Solving the Problems

[0005] To solve the above problems, in one aspect, the present invention provides a light projection control device including a detection unit that detects an abnormality occurring in a passage, a specification unit that specifies the position of the detected abnormality, and a light projection control unit that causes a projector to project light in a mode different from normal toward the specified position.

Effects of the Invention

[0006] According to the present invention, the abnormality that occurs becomes clearly visible. [Brief explanation of the drawing]

[0007] [Figure 1] A schematic diagram illustrating an example of a situation in which the floodlight system 9 is used. [Figure 2] A diagram showing an example of the overall configuration of the floodlight system 9. [Figure 3] A diagram showing an example of the configuration of the light projection control device 1. [Figure 4] A diagram showing an example of the configuration of position table 121. [Figure 5] A diagram showing an example of the configuration in Table 122. [Figure 6] A diagram showing an example of the functional configuration of the light projection control device 1. [Figure 7] A flowchart illustrating an example of the operation flow of the light projection control device 1. [Figure 8] A diagram showing an example of the overall configuration of the light projection system 9a in a modified example. [Figure 9] A diagram showing an example of the configuration of sensor 2a.

[0008] [Embodiment] [Overall configuration of the floodlighting system] Figure 1 is a schematic diagram showing an example of a situation in which the floodlight system 9 is used. As shown in Figure 1, the floodlight system 9 is used in a tunnel T formed on a road where vehicles V such as automobiles travel.

[0009] Typical tunnels do not always extend in a straight line as shown in Figure 1, but are often meandering or curved. Therefore, even if an anomaly such as a collision between vehicles V occurs inside tunnel T as shown in Figure 1, other vehicles V often cannot notice the anomaly. An anomaly here could be, for example, a falling object from the tunnel ceiling or other structures onto the passageway, a hole or depression in the pavement, or a fire caused by a vehicle traveling in the passageway. Furthermore, even if other vehicles V approach the scene of the anomaly, if the only light illuminating the scene is normal lighting, the people in the other vehicles V may not be able to clearly see the state of the anomaly.

[0010] Figure 2 shows an example of the overall configuration of the light projection system 9. The light projection system 9 includes one or more light projection control devices 1, one or more sensors 2, and one or more light projectors 3. The light projection control device 1 shown in Figure 2 is connected to multiple sensors 2 by, for example, a dedicated communication line that constitutes a closed-circuit television. The light projection control device 1 shown in Figure 2 is also connected to multiple light projectors 3 by a dedicated communication line.

[0011] Multiple sensors 2 are arranged along the tunnel T and detect anomalies occurring within the tunnel T. These sensors 2 are various types of sensors, such as cameras, smoke sensors, infrared sensors, distance image sensors, sound sensors, and thermometers. These sensors 2 may vary depending on the type of anomaly to be detected. Furthermore, two or more types of sensors 2 may be combined. When these sensors 2 detect an anomaly, they notify the light projection control device 1 of the detection result.

[0012] Multiple floodlights 3 are lighting devices arranged, for example, at predetermined intervals along the direction of travel of the vehicle V. These multiple floodlights 3 project light towards designated positions under the control of the light projection control device 1. The direction in which the floodlights 3 project light may be fixed, but it may also be possible to change it under the control of the light projection control device 1.

[0013] The light projection control device 1 is an information processing device that acquires sensing results from a plurality of sensors 2 and controls a projector 3 based on the sensing results to project light toward the position where an abnormality has occurred. The light projection control device 1 is, for example, a computer.

[0014] When the light projection system 9 has two or more light projection control devices 1, these two or more light projection control devices 1 may be communicably connected to each other by a communication line or the like (not shown) and function in cooperation.

[0015] [Configuration of Light Projection Control Device] FIG. 3 is a diagram showing an example of the configuration of the light projection control device 1. The light projection control device 1 shown in FIG. 3 includes a processor 11, a memory 12, a communication unit 13, an operation unit 14, and a display unit 15. The light projection control device 1 may also include an image processing unit 16 that processes images. These components are communicably connected to each other, for example, by a bus.

[0016] The processor 11 controls each part of the light projection control device 1 by reading and executing a computer program (hereinafter simply referred to as a program) stored in the memory 12. The processor 11 is, for example, a CPU (Central Processing Unit).

[0017] The communication unit 13 is a communication circuit that communicably connects the light projection control device 1 to other devices by wire or wirelessly. As shown in FIG. 3, the communication unit 13 directly connects the light projection control device 1 and the sensor 2 by wire as shown in FIG. 2. Also, the communication unit 13 directly connects the light projection control device 1 and the projector 3 by wire.

[0018] The operation unit 14 includes operation elements such as operation buttons, a keyboard, a touch panel, a mouse, etc. for giving various instructions, accepts an operation, and sends a signal corresponding to the operation content to the processor 11. This operation is, for example, pressing on a keyboard, a gesture on a touch panel, etc.

[0019] The display unit 15 has a display screen such as a liquid crystal display and displays an image under the control of the processor 11. A transparent touch panel of the operation unit 14 may be placed on top of the display screen. The light projection control device 1 does not necessarily have to have the operation unit 14 and the display unit 15. The light projection control device 1 may be operated from an external device via the communication unit 13, or it may present information to an external device.

[0020] The image processing unit 16 analyzes the image transmitted from the sensor 2 and generates information to estimate the shape, state, etc., of the objects depicted in the image.

[0021] Memory 12 is a storage means that stores the operating system, various programs, data, etc., that are loaded into the processor 11. Memory 12 has RAM (Random Access Memory) or ROM (Read Only Memory). Memory 12 may also have a solid-state drive, a hard disk drive, etc. Furthermore, this memory 12 stores a location table 121 and a configuration table 122.

[0022] [Structure of the location chart] Figure 4 shows an example of the configuration of the position table 121. The position table 121 shown in Figure 4 is a table that stores the items of sensor ID, position information, and light emitter ID in association with each other.

[0023] The Sensor ID field lists the Sensor IDs, which are identification information for identifying multiple sensors 2. The Location Information field stores information about the location within T detected by the Sensor 2 identified by the corresponding Sensor ID. The Floodlight ID field stores the Floodlight ID, which is identification information for floodlights capable of illuminating the location indicated by the Location Information.

[0024] Note that there does not have to be a one-to-one correspondence between sensor IDs and location information. For example, multiple location information may be associated with a single sensor ID. In short, if there are multiple locations that sensor 2, which is uniquely identified by its sensor ID, can detect, then the location information indicating those locations should be associated with the sensor ID in the location table 121.

[0025] Furthermore, there does not have to be a one-to-one correspondence between the floodlight ID and the location information. For example, multiple location information may be associated with a single floodlight ID. In short, if there are multiple locations where floodlight 3, which is uniquely identified by its floodlight ID, can emit light, then it is sufficient that the location information indicating those locations is associated with the floodlight ID in the location table 121.

[0026] [Structure of the configuration table] Figure 5 shows an example of the configuration of the aspect table 122. The aspect table 122 shown in Figure 5 is a table that stores the items of type ID, degree information, and aspect ID in a corresponding manner.

[0027] The Type ID is an item that lists Type IDs, which are identification information that identifies the type of anomaly that may occur. The Severity Information is an item that stores information indicating the degree of the anomaly that may occur. The Mode ID is an item that stores a Mode ID that identifies the mode of projection associated with each combination of the type of anomaly identified by the Type ID and the degree of the anomaly indicated by the Severity Information. The Mode ID is read by the processor 11 when an anomaly of the corresponding type occurs to the corresponding degree in the Mode Table 122. When the processor 11 reads the Mode ID, it instructs a specific light source 3 to project light in the mode identified by that Mode ID.

[0028] Furthermore, the pattern ID may not be associated with each combination of type and degree of abnormality, but rather with only the type or only the degree.

[0029] [Functional configuration of the light projection control device] Figure 6 shows an example of the functional configuration of the light projection control device 1. The processor 11 of the light projection control device 1 functions as a detection unit 111, a identification unit 112, and a light projection control unit 113 by executing a program stored in the memory 12.

[0030] Sensor 2 is positioned along the road inside tunnel T. Sensor 2 includes cameras, smoke sensors, infrared sensors, etc., that monitor the passageway and sends information indicating the detected results to the light projection control device 1.

[0031] The detection unit 111 acquires information from the sensor 2 and detects abnormalities occurring in the passage based on that information. In other words, this detection unit 111 is an example of a detection unit that detects abnormalities occurring in a passage.

[0032] When sensor 2 transmits an image of the passageway, detection unit 111 uses this image to detect any abnormalities occurring in the passageway. For example, sensor 2 may be a series of video cameras (imaging devices) installed along the road (passageway) inside tunnel T.

[0033] In this case, these multiple video cameras may be connected to the light projection control device 1 in the central control room via a dedicated line. That is, the multiple video cameras constituting sensor 2 each transmit video data showing the images they have captured to the light projection control device 1 in real time. The display unit 15 of the light projection control device 1 then displays the images shown by these transmitted video data. These multiple video cameras, which constitute sensor 2, and the light projection control device 1 constitute a closed-circuit television.

[0034] In this case, the video (image) that sensor 2 sends to light projection control device 1 is an example of an image captured by an imaging device for a closed-circuit television installed along the passageway.

[0035] In this case, the detection unit 111 may, for example, utilize the results analyzed using the image processing unit 16 described above. This detection unit 111 is an example of a detection unit that detects abnormalities using images taken of a passageway.

[0036] The identification unit 112 identifies the location where an abnormality has occurred when the detection unit 111 detects the occurrence of the abnormality. For example, the identification unit 112 shown in Figure 6 refers to the location table 121, reads the location information corresponding to the sensor ID that identifies the sensor 2 that sent the information indicating the detected abnormality, and identifies the location indicated by that location information. In other words, this identification unit 112 is an example of an identification unit that identifies the location of a detected abnormality.

[0037] Furthermore, if the location information associated with the sensor ID in the location table 121 indicates the installation location of the sensor 2 identified by that sensor ID, the identification unit 112 identifies the installation location of the sensor 2 that detected the abnormality. In this case, the identification unit 112 is an example of an identification unit that identifies the location of the detected abnormality based on the identification information associated with the installation location of the sensor that detected the abnormality. The identification unit 112 notifies the light emitter ID corresponding to the identified location of the light emitter control unit 113.

[0038] The light projection control unit 113 estimates the type and severity of the abnormality detected by the detection unit 111. The light projection control unit 113 then refers to the pattern table 122 and determines a pattern ID corresponding to the estimated type and severity of the abnormality. The light projection control unit 113 then instructs the light projector 3, identified by the notified light projector ID, to project light towards the location where the abnormality occurred in the manner identified by the determined pattern ID.

[0039] Here, the mode of illumination indicated by the mode ID described in Mode Table 122 is different from the mode of illumination used to light the inside of tunnel T under normal circumstances. For example, the mode of illumination indicated by this mode ID is a mode of illumination that uses stronger light than under normal circumstances.

[0040] In other words, this light projection control unit 113 is an example of a light projection control unit that projects light from a light source in a manner different from normal, directed towards a specific location. Furthermore, this light projection control unit 113 is an example of a light projection control unit that projects light more strongly than normal when the detection unit detects an abnormality.

[0041] [Operation of the floodlight control device] Figure 7 is a flowchart showing an example of the operation flow of the light projection control device 1. The processor 11 of the light projection control device 1 determines whether or not it has detected an abnormality that occurred in the passage (step S101). As long as it is determined that no abnormality has been detected (step S101; NO), the processor 11 continues the processing in step S101.

[0042] On the other hand, if it determines that an abnormality has been detected (step S101; YES), the processor 11 identifies the location where the detected abnormality is occurring (step S102) and identifies the light emitter 3 corresponding to that location (step S103).

[0043] Furthermore, the processor 11 identifies the type and degree of the abnormality that occurred (step S104), and determines the mode of light projection according to the combination of the identified type and degree of abnormality (step S105).

[0044] Then, the processor 11 instructs the identified light emitter 3 to emit light in the determined manner (step S106).

[0045] As described above, when the light projection control device 1 in the present invention detects an abnormality, it projects light from the light projector 3 towards the location where the abnormality occurred. With this configuration, abnormalities occurring in the passageway become clearly visible to, for example, people, cameras, etc., located nearby. Furthermore, with this configuration, those who directly or indirectly perceive the light projected by the light projector 3 can also understand the type and severity of the abnormality that has occurred.

[0046] [Differentiation] The embodiments described above are just one specific example of the present invention and can be modified in various ways within the scope of the technical idea of ​​the present invention. Examples of such modifications are as follows. Two or more of the following modifications may be combined as appropriate.

[0047] (1) In the embodiments described above, the mode table 122 described mode IDs indicating modes in which light is emitted with a stronger intensity than normal, but this mode is not limited to modes of illumination by a single floodlight 3. For example, the mode table 122 may describe mode IDs indicating modes in which multiple floodlights 3 emit light from different directions toward the location where the abnormality occurred.

[0048] In this case, the light projection control unit 113 implemented by the processor 11 projects light from more directions than usual, for example, using multiple light projectors 3, towards the location where the detected anomaly is occurring. As a result, the location where the anomaly is occurring is illuminated from more directions than usual, making it less likely for shadows to form and easier for observers to see. In other words, this light projection control unit 113 is an example of a light projection control unit that projects light from more directions than usual when the detection unit detects an anomaly.

[0049] Furthermore, the mode of illumination instructed to the floodlight 3 when an abnormality is detected should, in short, be one that clearly indicates the situation at the location where the abnormality occurred compared to normal conditions. In addition, the mode of illumination may include flashing lights, color changes, movement of the illumination range, etc. In this case, a person who sees this mode of illumination will be more likely to notice that an abnormality has occurred because the illumination is different from normal conditions.

[0050] (2) In the above-described embodiment, the sensor 2 sent images captured by a video camera for a closed-circuit television to the light projection control device 1 as a sensing result. However, the imaging device for capturing images to sense abnormalities occurring in the passageway is not limited to this. The light projection control device 1 may acquire images from, for example, an imaging device such as a drive recorder mounted on the vehicle V.

[0051] Figure 8 shows an example of the overall configuration of the light projection system 9a in a modified example. The light projection system 9a has a sensor 2a, which is composed of an imaging device mounted on the vehicle, in addition to or instead of the sensor 2.

[0052] Figure 9 shows an example of the configuration of sensor 2a. Sensor 2a is, for example, an imaging device such as a drive recorder mounted on a vehicle V. This sensor 2a has a processor 21, memory 22, communication unit 23, operation unit 24, display unit 25, imaging unit 26, and positioning unit 27.

[0053] The processor 21 controls each part of the sensor 2a by reading and executing a program stored in the memory 22. The processor 21 is, for example, a CPU.

[0054] The communication unit 23 is a communication circuit that connects the sensor 2a to other devices via wired or wireless means. The communication unit 23 shown in Figure 9 connects the sensor 2a and the light emission control device 1 wirelessly.

[0055] The control unit 24 is equipped with various control elements such as control buttons, a keyboard, a touch panel, and a mouse for issuing various instructions, and receives operations and sends signals corresponding to the content of those operations to the processor 21.

[0056] The display unit 25 has a display screen such as a liquid crystal display and displays images under the control of the processor 21. A transparent touch panel of the operation unit 24 may be placed on top of the display screen. The sensor 2a does not necessarily have to have an operation unit 24 and a display unit 25.

[0057] Memory 22 is a storage means for storing the operating system, various programs, data, etc., that are loaded into the processor 21. Memory 22 may include RAM or ROM. Memory 22 may also include a solid-state drive, a hard disk drive, etc.

[0058] The imaging unit 26 is an imaging device such as a video camera that captures images of the surroundings when the vehicle V is traveling through a passage inside the tunnel T. The imaging unit 26 includes an optical system for focusing light, such as a lens, and an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charge Coupled Device) image sensor.

[0059] The positioning unit 27 is a device that measures the position of the device itself. This positioning unit 27 is, for example, a receiver of a satellite positioning system such as the Global Navigation Satellite System or a Regional Navigation Satellite System. When the positioning unit 27 is a receiver of a satellite positioning system, the sensor 2a determines its own position using a combination of latitude and longitude.

[0060] Alternatively, the positioning unit 27 may receive radio beacon signals or the like transmitted from transmitters pre-installed in the tunnel T and identify the position associated with these radio beacon signals.

[0061] Furthermore, the positioning unit 27 may measure its own position using various indoor positioning technologies. The positioning unit 27 may, for example, use an acceleration sensor that detects acceleration in three axes to calculate the distance the device has moved and estimate its own position based on this distance.

[0062] This sensor 2a is mounted on the vehicle V and takes images of the surroundings as the vehicle V travels along a passageway, and stores the image data representing the captured images in the memory 22. In addition, the sensor 2a sends a portion of the image data to the light projection control device 1 via wireless communication, for example using the communication unit 23, along with position information indicating the position of the vehicle V measured by the positioning unit 27 when the image represented by the image data was captured.

[0063] As described above, the processor 11 of the light projection control device 1 functions as a detection unit 111. This detection unit 111 analyzes a portion of the video data sent from the sensor 2a and determines whether or not the video data contains an anomaly. When the detection unit 111 determines that an anomaly is present in the video, it means that an anomaly has occurred in the passageway.

[0064] Furthermore, as described above, the processor 11 functions as a identification unit 112. When the detection unit 111 detects an abnormality, the identification unit 112 identifies the location where the abnormality occurred based on the location information sent in association with the video data described above, and identifies a light emitter 3 capable of emitting light toward that location. The light emission control unit 113 implemented by the processor 11 only needs to issue instructions to the identified light emitter 3.

[0065] In this case, the image transmitted by sensor 2a, which is used to detect abnormalities, is an example of an image captured by an imaging device mounted on a vehicle traveling in a passageway.

[0066] In this case, the identification unit 112 implemented by the processor 11 is an example of an identification unit that identifies the location of an anomaly detected based on positioning results that measure the location where the anomaly is occurring.

[0067] (3) In the modified example described above, the sensor 2a was an imaging device such as a drive recorder mounted on the vehicle V, but as shown in Figure 8, it may be an imaging device such as a camera mounted on a mobile device such as a smartphone carried by a person moving through a passageway.

[0068] In this case, the image transmitted by the sensor 2a used to detect anomalies is an example of an image captured by an imaging device mounted on a portable terminal carried by a person moving along the passageway. In this case, the positioning unit 27 of the sensor 2a may also measure its own position by utilizing the communication connection status with small base stations, such as so-called femtocells, which are arranged along the passageway.

[0069] (4) In the embodiment described above, the light-emitting system 9 is an example of a light-emitting system having a plurality of sensors, a plurality of light emitters, and one or more light-emitting control devices. The light-emitting control device 1 in this light-emitting system 9 is an example of a light-emitting control device having a detection unit that acquires information from any of the plurality of sensors and detects an abnormality occurring in the passage, a identification unit that identifies the location of the detected abnormality, and a light-emitting control unit that causes any of the plurality of light emitters to emit light toward the identified location in a manner different from that of normal use.

[0070] (5) In the embodiments described above, the floodlighting system 9 is applied to a road inside the tunnel T, but the scope of application is not limited to inside the tunnel T. The floodlighting system 9 may be applied to roads at night, paths such as forest roads that are relatively dark even during the day, railways, etc.

[0071] (6) In the embodiments described above, the sensor 2 was, for example, a camera, smoke sensor, infrared sensor, distance image sensor, sound sensor, thermometer, etc., but other configurations are also possible. For example, the sensor 2 may be a so-called LiDAR (Light Detection and Ranging) mounted on the vehicle V.

[0072] Furthermore, sensor 2 may be at least one optical fiber sensor. If sensor 2 is an optical fiber sensor, it only needs to detect its own position distorted by external forces, heat, etc.

[0073] (7) In the embodiment described above, the floodlight 3 was a lighting device arranged at predetermined intervals along the direction of travel of the vehicle V, but other configurations are also possible. For example, the floodlight 3 may be a lighting device installed in emergency equipment such as fire extinguishers, fire hydrants, fire detectors, push-button alarm devices, and emergency telephones, and their housing boxes.

[0074] Furthermore, the floodlight 3 may be a mobile lighting device. The mobile floodlight 3 may be mounted on, for example, a drone, a radio-controlled car, or a robot that travels along rails. In this case, the floodlight 3 may receive instructions from the floodlight control device 1 and move to the location where the detected abnormality has occurred.

[0075] (8) In the embodiments described above, the processor 11 was a CPU, but it may be configured in other ways. The processor 11 may be, for example, an FPGA (Field Programmable Gate Array), or may include an FPGA. Alternatively, this processor may have an ASIC (Application Specific Integrated Circuit) or other programmable logic device, and control may be performed by these.

[0076] (9) In the embodiment described above, the program loaded into the processor 11 is an example of a program that causes the computer to function as a detection unit that detects an abnormality occurring in the passage, a location unit that identifies the location of the detected abnormality, and a light projection control unit that causes the light projector to project light towards the identified location in a manner different from that of normal operation. [Explanation of symbols]

[0077] 1...Light projection control device, 11...Processor, 111...Detection unit, 112...Specification unit, 113...Light projection control unit, 12...Memory, 121...Position table, 122...Pattern table, 13...Communication unit, 14...Operation unit, 15...Display unit, 16...Image processing unit, 2, 2a...Sensor, 21...Processor, 22...Memory, 23...Communication unit, 24...Operation unit, 25...Display unit, 26...Imaging unit, 27...Positioning unit, 3...Light projector, 9, 9a...Light projection system.

Claims

1. A detection unit for detecting abnormalities occurring in the passageway inside the tunnel, A unit for identifying the location of the detected abnormality, Based on information indicating the positions to which each of the multiple floodlights can emit light, the light emission control unit identifies one or more floodlights from among the multiple floodlights that are capable of illuminating the position identified by the identification unit, and causes the one or more floodlights to emit light in a manner different from normal so that the abnormality is clearly visible toward that position. A light-emitting control device.

2. When the detection unit detects the abnormality, the light projection control unit will project light more strongly than usual, or from more directions than usual. The light projection control device according to claim 1.

3. The aforementioned identification unit identifies the location based on the positioning results obtained by measuring the location where the abnormality occurred. The light projection control device according to claim 1 or 2.

4. The identification unit identifies the location based on identification information associated with the installation location of the sensor that detected the abnormality. The light projection control device according to claim 1 or 2.

5. A detection unit for detecting abnormalities occurring in the passageway inside the tunnel, A unit for identifying the location of the detected abnormality, A light projection control unit that projects light from a floodlight in a manner different from normal, toward the specified position, It has, The detection unit detects the abnormality using an image captured by an imaging device mounted on a vehicle traveling along the passage. Floodlight control device.

6. A detection unit for detecting abnormalities occurring in the passageway inside the tunnel, A unit for identifying the location of the detected abnormality, A light projection control unit that projects light from a floodlight in a manner different from normal, toward the specified position, It has, The detection unit detects the abnormality using an image captured by an imaging device mounted on a portable terminal carried by a person moving through the passage. Floodlight control device.

7. Multiple sensors, Multiple floodlights, It comprises one or more light projection control devices, The aforementioned light projection control device is A detection unit that acquires information from any of the aforementioned multiple sensors to detect abnormalities occurring in the tunnel passage, A unit for identifying the location of the detected abnormality, Based on information indicating a predetermined position where each of the plurality of floodlights can emit light, the light emission control unit identifies one or more floodlights from among the plurality of floodlights that are capable of illuminating the position identified by the identification unit, and causes the one or more floodlights to emit light in a manner different from normal so that the abnormality is clearly visible toward that position. A floodlighting system characterized by having the following features.

8. Computers, A detection unit that detects abnormalities occurring in the tunnel passageway, A unit for identifying the location of the detected abnormality, Based on information indicating the positions to which each of the multiple floodlights can emit light, the light-emitting control unit identifies one or more floodlights from among the multiple floodlights that are capable of illuminating the position identified by the identification unit, and causes the one or more floodlights to emit light in a manner different from normal so that the abnormality is clearly visible toward that position. A program designed to function as such.

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