Fire protection system

Abstract

This fire protection system comprises: a first detection unit that detects, on the basis of first information obtained by sensing a monitoring target or a space around the monitoring target, a candidate fire source in which there is a sign of fire occurrence in the monitoring target; and a second detection unit that detects whether or not the candidate fire source is a prescribed fire prevention target on the basis of second information in which more details about the candidate fire source detected by the first detection unit are obtained, as compared with the first information.

Description

Fire Protection Systems

[0001] The present disclosure relates to fire protection systems.

[0002] Patent Document 1 discloses a waste treatment facility equipped with a crusher for crushing waste, a conveyor for transporting the crushed waste, and a chute for leading waste from downstream of the conveyor to the next process. The fire prevention device of the waste treatment facility includes a shutoff means for shutting off the passage of the chute in response to a signal from a fire and / or explosion detection means provided on the conveyor, and a water sprinkler means for filling the blocked chute with water.

[0003] Patent Document 2 discloses a monitoring system that transmits image data output from an infrared camera to a receiving terminal connected to a network. The receiving terminal has a fire detection means that detects a fire from the transmitted image data and a display means that displays fire information detected by the fire detection means.

[0004] JP 2015-6649 A JP 2009-100198 A

[0005] However, if a fire breaks out in waste, it may take a long time to restore the facilities if the response is made after the fire has started. Therefore, there is a need for technology that can respond to areas where fires are likely to occur before a fire occurs.

[0006] The present disclosure provides a fire protection system that allows for pre-fire response to potential fire outbreaks.

[0007] The fire prevention system of the present disclosure comprises a first detection unit that detects a potential fire source among the monitored object that indicates a possible fire outbreak based on first information obtained by sensing the monitored object or the space surrounding the monitored object, and a second detection unit that detects whether the potential fire source detected by the first detection unit is a specified fire prevention target based on second information obtained in more detail than the first information regarding the potential fire source detected by the first detection unit.

[0008] The fire prevention system of the present disclosure includes a detection unit that detects a potential fire source among the monitored object that indicates a possible fire outbreak based on information obtained by sensing the monitored object or the space surrounding the monitored object, and a derivation unit that derives the remaining time until the fire outbreak after the potential fire source is detected based on at least information obtained regarding the potential fire source.

[0009] According to the present disclosure, it is possible to provide a fire prevention system that enables responses to locations where a fire is likely to occur before a fire occurs.

[0010] 1 is a schematic configuration diagram of a fire prevention system according to a first embodiment of the present disclosure. FIG. 2 is a functional block diagram of a control device according to a first embodiment of the present disclosure. FIG. 3 is a flowchart illustrating an example of the operation of the control device according to the first embodiment of the present disclosure. FIG. 4 is a schematic configuration diagram of a fire prevention system according to a second embodiment of the present disclosure. FIG. 5 is a perspective view showing a portion of a conveying device and a chute unit according to a second embodiment of the present disclosure. FIG. 6 is a functional block diagram of a control device according to a second embodiment of the present disclosure. FIG. 7 is a diagram for explaining the tracking imaging of an imaging unit by an adjustment unit according to a second embodiment of the present disclosure. FIG. 8 is a graph showing the relationship between the field of view of an imaging unit according to a second embodiment of the present disclosure and the temperature of a detected monitored object. FIG. 9 is a diagram illustrating a fire prevention device at the destination of a fire source candidate according to a second embodiment of the present disclosure, the fire source candidate being associated with the position on the conveyor. FIG. 10 is a flowchart illustrating an example of the operation of a control device according to a second embodiment of the present disclosure. FIG. 11 is a diagram illustrating the state of a monitored object on a conveying device according to a fourth embodiment of the present disclosure. FIG. 12 is a schematic diagram illustrating a state when an ignition source is included in a monitored object on a conveying device according to a fourth embodiment of the present disclosure. FIG. 13 is a diagram illustrating the state of a monitored object on a conveying device according to a fourth embodiment of the present disclosure. FIG. 14 is a diagram illustrating the state of a monitored object on a conveying device according to a fourth embodiment of the present disclosure when an ignition source is included in the monitored object. FIG. 15 is a diagram illustrating the state change of a fire source candidate over time for each position of the ignition source. FIG. 16 is a diagram illustrating the correspondence relationship (a) between the time axis and the surface temperature, and the correspondence relationship (b) between the time axis and the heat release rate for each type (i to iii) of monitored Fig. 10 is a functional block diagram of a control device according to a fourth embodiment of the present disclosure. Fig. 11 is a flowchart showing an example of the operation of the control device according to the fourth embodiment of the present disclosure. Fig. 12 is a schematic configuration diagram of a fire prevention system according to another embodiment of the present disclosure. Fig. 13 is a hardware configuration diagram showing the configuration of a computer according to an embodiment of the present disclosure.

[0011] Hereinafter, an embodiment of the fire protection system 100 will be described with reference to the accompanying drawings.

[0012] <First Embodiment of Fire Prevention System> The fire prevention system 100 is a system that operates in a waste treatment plant that treats, for example, municipal solid waste, industrial waste, etc. The fire prevention system 100 prevents fires from occurring in the materials being treated in the waste treatment plant. In the description herein, the materials being treated in the waste treatment plant are referred to as "monitored objects T." As shown in FIG. 1 , the fire prevention system 100 includes, for example, an imaging unit 1, a mobile device 2, a detector 3, a fire prevention device 4, and a control device 5.

[0013] (Imaging Unit) The imaging unit 1 is a camera that captures an overall image of the surface of the monitoring target T stored in a predetermined space from above in the vertical direction Dv. Hereinafter, the predetermined space in which the monitoring target T is stored will be referred to as the "storage space R1." The imaging unit 1 generates a visible light image of the surface of the monitoring target T stored in the storage space R1, and transmits the generated visible light image to the control device 5, which will be described later. Note that the imaging unit 1 may be a camera that generates an infrared image or an ultraviolet image instead of a visible light image.

[0014] (Mobile device) The mobile device 2 is a device that can move within the storage space R1. The mobile device 2 is capable of moving toward the monitored object T and moving away from the monitored object T. The mobile device 2 moves within the storage space R1 at a position closer to the monitored object T than the imaging unit 1. In this embodiment, the mobile device 2 can run on, for example, the floor surface that defines the storage space R1. The movement of the mobile device 2 is controlled by the control device 5. The mobile device 2 is an example of an operation target device S.

[0015] (Detector) The detector 3 is mounted on the mobile device 2. That is, the detector 3 is provided on the mobile device 2 and moves together with the mobile device 2. In this embodiment, the detector 3 is a camera that captures an image of a portion of the surface of the monitored object T when the mobile device 2 approaches the monitored object T. The detector 3 captures an image of an area of ​​the monitored object T that is smaller than the area that can be captured by the imaging unit 1. The detector 3 generates a visible light image of the portion of the surface of the monitored object T and transmits the generated visible light image to the control device 5. Note that the detector 3 may be a camera that generates an infrared image or an ultraviolet image instead of a camera that generates a visible light image. Hereinafter, the visible light image transmitted by the imaging unit 1 and the detector 3 to the control device 5 will be simply referred to as an "image." The image is an example of first information obtained by sensing the monitored object T.

[0016] (Fire Prevention Device) The fire prevention device 4 is provided on the mobile device 2 and performs fire prevention treatment on the monitored object T. In this embodiment, the fire prevention device 4 is controlled by the control device 5 to spray inert gas in a predetermined direction (the direction in which the monitored object T is located). In other words, the fire prevention device 4 performs fire prevention treatment on the monitored object T using an elimination fire extinguishing method. Spraying inert gas is an example of the above-mentioned fire prevention treatment. Furthermore, the fire prevention device 4 is an example of an activation target device S.

[0017] (Control Device) The control device 5 remotely controls the mobile device 2 and the fire prevention device 4 based on images received from the imaging unit 1 and the detector 3. As shown in Fig. 2 , the control device 5 has, for example, an acquisition unit 50, a first detection unit 51, a second detection unit 52, an operation unit 53, and a storage unit 54.

[0018] (Acquisition Unit) The acquisition unit 50 acquires images transmitted from the imaging unit 1 at a predetermined cycle, sends the images acquired from the imaging unit 1 to the first detection unit 51, acquires images transmitted from the detector 3, and sends the images acquired from the detector 3 to the second detection unit 52. The predetermined cycle is determined based on, for example, the frame rate (fps: frames per second) of the imaging unit 1.

[0019] (First Detection Unit) Based on an image received from the acquisition unit 50, the first detection unit 51 detects a fire source candidate T1 among the monitored object T shown in the image that indicates a sign of a fire. As used herein, "signs of a fire" refer to the possibility of a future fire. Furthermore, the "fire source candidate T1" refers to a region of the monitored object T shown in the image, and all brightness values ​​of the region are greater than the brightness values ​​of the surrounding regions by at least a predetermined first threshold. In this embodiment, as the surface temperature of the monitored object T increases, the brightness values ​​of the region capturing the monitored object T in the image increase. In other words, the fire source candidate T1 in the image indicates a region of the monitored object T that is relatively hot. The first threshold is pre-stored in, for example, the memory unit 54. The first detection unit 51 performs the above detection operation by referencing the first threshold from the memory unit 54 as needed. Specifically, the first detection unit 51 detects the position of the fire candidate T1 (for example, the center or outer edge of the fire candidate T1) by determining the brightness value in the image. Each pixel in the image that the first detection unit 51 detects is associated with coordinates that represent the position within the storage space R1, for example. The first detection unit 51 sends the position of the fire candidate T1 to the operation unit 53.

[0020] (Second Detection Unit) The second detection unit 52 detects whether the fire source candidate T1 is a predetermined fire prevention target based on the image received from the acquisition unit 50. The image used by the second detection unit 52 for detection is an example of second information acquired in more detail than the first information. The "predetermined fire prevention target" described in this specification refers to a location (fire source) where a fire may occur in the future and where fire prevention measures by the fire prevention device 4 are required. The second detection unit 52 determines whether the brightness value of the fire source candidate T1 captured in the image exceeds a predetermined second threshold, and if the brightness value exceeds the second threshold, acquires the location of the fire source candidate T1 where the brightness value exceeds the second threshold. Hereinafter, the location of the fire source candidate T1 where the brightness value exceeds the second threshold is referred to as the "fire source position T2." The second threshold is, for example, greater than the first threshold. The second threshold is pre-stored in, for example, the memory unit 54. The second detection unit 52 performs the above detection operation by referencing the second threshold from the memory unit 54 as appropriate. Each pixel in the image detected by the second detection unit 52 is associated with coordinates that represent a position within the storage space R1. The second detection unit 52 sends the fire source position T2 to the operation unit 53.

[0021] (Operation Unit) The operation unit 53 activates the operation target device S (the mobile device 2 and the fire prevention device 4) when it receives the position of the fire source candidate T1 from the first detection unit 51 and when it receives the fire source position T2 from the second detection unit 52. The operation unit 53 has a first operation unit 531 and a second operation unit 532.

[0022] When the first actuation unit 531 receives the position of the fire candidate T1 from the first detection unit 51, it actuates the moving device 2 to move the moving device 2 closer to the fire candidate T1 (see (a) and (b) in FIG. 1). Specifically, the first actuation unit 531 moves the moving device 2 to the vicinity of the position of the fire candidate T1 and actuates the moving device 2 so that the direction of the inert gas ejected by the fire prevention device 4 is directed toward the fire candidate T1.

[0023] When the second operating unit 532 receives the fire source position T2 from the second detection unit 52, it operates the fire prevention device 4 to perform fire prevention treatment on the monitored object T located at the fire source position T2. ​​Specifically, the second operating unit 532 performs fire prevention treatment on the monitored object T located at the fire source position T2 by transmitting an instruction to the fire prevention device 4 to eject inert gas toward the fire source position T2.

[0024] (Operation of Control Device) Next, an example of the operation of the control device 5 in this embodiment will be described with reference to Fig. 3. However, the order of the processes described below is not limited to the following example and may be changed as appropriate.

[0025] The acquisition unit 50 acquires an image of the monitored object T from the imaging unit 1 (step S100). Next, the first detection unit 51 detects a fire source candidate T1 within the monitored object T (step S101). Next, the operation unit 53 operates the moving device 2 (step S102). Next, the acquisition unit 50 acquires an image of the monitored object T from the detector 3 (step S103). Next, the second detection unit 52 detects whether the fire source candidate T1 is a fire prevention target (step S104). Next, the operation unit 53 operates the fire prevention device 4 (step S105). The above-described operation of the control device 5 is repeatedly executed during operation of the waste treatment plant.

[0026] (Actions and Effects) The above-described fire prevention system 100 detects a fire source candidate T1 among the monitored object T that shows signs of a fire outbreak, and determines whether the fire source candidate T1 is a specified fire prevention target based on information acquired about the fire source candidate T1 using the mobile device 2 equipped with the detector 3. This makes it possible to detect locations where a fire is likely to break out with high accuracy before a fire occurs. Furthermore, in the above-described fire prevention system 100, when the fire source candidate T1 is detected as a fire prevention target, the fire prevention device 4 is activated to perform fire prevention treatment on the fire source candidate T1 that is a fire prevention target. Therefore, it is possible to prevent a fire from breaking out at the monitored object T.

[0027] <Second embodiment of fire protection system> Next, a second embodiment of the fire protection system 100 according to the present disclosure will be described. In the second embodiment described below, components common to the first embodiment will be denoted by the same reference numerals in the drawings, and descriptions thereof will be omitted.

[0028] 4, the fire protection system 100 includes, for example, a control device 6, a conveying device 7, a chute unit 8, a transfer device 9, an imaging unit 10, and a fire protection device 40. First, the configuration of the conveying device 7 will be described.

[0029] (Transportation Device) The transport device 7 receives the monitoring object T crushed by the crusher 200 from the crusher 200 and transports the monitoring object T toward a destination. In this embodiment, the transport device 7 is disposed in a space defined by a plurality of wall surfaces 300, and transports the monitoring object T within the space. The wall surfaces 300 are, for example, part of the equipment within a waste treatment plant. Hereinafter, the space in which the transport device 7 is disposed and in which the monitoring object T is transported by the transport device 7 will be referred to as a "transport space R2." The transport device 7 is an example of a moving device 2.

[0030] The transport device 7 has multiple conveyors 70. Each of the multiple conveyors 70 transports a monitoring target T. FIG. 4 shows an example in which four conveyors 70 are lined up in a row in the direction in which the transport space R2 extends. That is, a monitoring target T transported by one conveyor 70 falls onto the conveyor 70 adjacent to that conveyor 70 and is then transported by the adjacent conveyor 70. For ease of explanation, these four conveyors 70 will be referred to as the "first conveyor 71," "second conveyor 72," "third conveyor 73," and "fourth conveyor 74" in order from the side closest to the crusher 200. In addition, the side of the transport space R2 closest to the crusher 200 may be referred to as the "upstream side," and the side closer to the target location and away from the crusher 200 may be referred to as the "downstream side."

[0031] The first conveyor 71 is disposed below the crusher 200 in the vertical direction Dv and receives the monitoring objects T crushed by the crusher 200. The first conveyor 71 transports the monitoring objects T supplied from the crusher 200 downstream and drops the transported monitoring objects T to the second conveyor 72. The second conveyor 72 is disposed downstream of the first conveyor 71. The second conveyor 72 transports the monitoring objects T supplied from the first conveyor 71 downstream and drops the transported monitoring objects T to the third conveyor 73. The third conveyor 73 is disposed downstream of the second conveyor 72 and has its upstream end overlapping the second conveyor 72 in the vertical direction Dv. The third conveyor 73 transports the monitoring objects T supplied from the second conveyor 72 downstream and drops the transported monitoring objects T to the fourth conveyor 74. The fourth conveyor 74 is disposed downstream of the third conveyor 73, and its upstream end overlaps the third conveyor 73 in the vertical direction Dv. The fourth conveyor 74 transports the monitored object T supplied from the third conveyor 73 toward a target location downstream.

[0032] The second conveyor 72, the third conveyor 73, and the fourth conveyor 74 have the same width (W2 shown in FIG. 5). Hereinafter, the second conveyor 72, the third conveyor 73, and the fourth conveyor 74 may be collectively referred to as the "other conveyors 70." The "width" here refers to the dimension in the width direction of the conveyor 70 (a direction intersecting the vertical direction Dv and perpendicular to the direction in which the monitored object T is transported). On the other hand, the width of the first conveyor 71 (W1 shown in FIG. 5) is larger than the width of the other conveyors 70. The width of the first conveyor 71 is, for example, at least twice the width of the other conveyors 70. Note that the width of the first conveyor 71 may be more than one time but less than two times the width of the other conveyors 70.

[0033] The operation of each conveyor 70 (first conveyor 71 to fourth conveyor 74) is controlled by a control device 6 (described below). Specifically, the control device 6 controls the starting (starting of operation), maintaining operation, and stopping (terminating operation) of the conveyor 70. The control device 6 operates the conveyor 70 in two ways: forward operation, which operates the conveyor 70 so that the monitored object T is transported downstream, and reverse operation, which operates the conveyor 70 so that the monitored object T is transported upstream. In other words, in FIG. 4 , when the conveyor 70 is operated in the forward direction, the monitored object T on the conveyor 70 moves to the right (downstream), and when the conveyor 70 is operated in the reverse direction, the monitored object T on the conveyor 70 moves to the left (upstream). The conveying speeds of the second conveyor 72, third conveyor 73, and fourth conveyor 74 are all equal. On the other hand, the conveying speed of the first conveyor 71 is slower than the conveying speeds of the other conveyors 70. The conveying speed of the first conveyor 71 is, for example, 0.5 times or less than the conveying speed of the other conveyors 70. Note that the conveying speed of the first conveyor 71 may be, for example, greater than 0.5 times but less than 1 time the conveying speed of the other conveyors 70. Hereinafter, the state in which each conveyor 70 (first conveyor 71 to fourth conveyor 74) is operated in the forward direction may be referred to as "normal operation," and the state in which each conveyor 70 is operated in the reverse direction may be referred to as "abnormal operation." The conveying device 7 (first conveyor 71 to fourth conveyor 74) is an example of an operation target device S.

[0034] (Chute section) The chute section 8 temporarily receives and stores the monitoring objects T that have fallen from the first conveyor 71, and supplies the received monitoring objects T from above in the vertical direction Dv onto the second conveyor 72. The chute section 8 is disposed between the first conveyor 71 and the second conveyor 72.

[0035] As shown in FIG. 5 , the chute unit 8 has a predetermined box-like shape. The chute unit 8 has a supply hole 80h in its central portion, which is rectangular when viewed from the vertical direction Dv. The supply hole 80h has a first opening 80u that opens upward in the vertical direction Dv and a second opening 80d that opens downward in the vertical direction Dv. The second opening 80d opens toward the second conveyor 72. In this embodiment, the area defined on the inner surface of the supply hole 80h is uniformly formed in the vertical direction Dv. The supply hole 80h may be formed so that its area narrows from the first opening 80u toward the second opening 80d. Furthermore, the supply hole 80h does not have to be rectangular when viewed from the vertical direction Dv. For example, the supply hole 80h may be formed in a circular or polygonal shape other than a rectangle. The width of the second opening 80d is equal to the width W2 of the second conveyor 72, for example. The width of the second opening 80d may be smaller than the width W2 of the second conveyor 72.

[0036] The chute 8 also has a guide portion 8g connected to the first opening 80u, the cross-sectional area of ​​which perpendicular to the vertical direction Dv increases as it extends upward in the vertical direction Dv. In this embodiment, the guide portion 8g is composed of four surfaces 8a. Adjacent surfaces 8a of these four surfaces 8a are connected to each other to form a receiving opening 8h at the uppermost position of the chute 8. The width of the receiving opening 8h is, for example, equal to the width W1 of the first conveyor 71. Note that the width of the receiving opening 8h may be greater than the width W1 of the first conveyor 71.

[0037] Therefore, the monitored object T transported downstream by the first conveyor 71 falls into the chute section 8, is guided downward by the guide section 8g (four surfaces 8a) of the chute section 8, and then is supplied from above to the second conveyor 72 through the supply hole 80h.

[0038] (Imaging Unit) Returning to Fig. 4, the imaging unit 10 is a camera that captures an image of the surface of the monitoring target T being transported in the transport space R2 from above. The imaging unit 10 generates a visible light image of the surface of the monitoring target T and transmits the generated image to the control device 6. The image is an example of first information obtained by sensing the monitoring target T. Note that the imaging unit 10 may be a camera that generates an infrared image or an ultraviolet image instead of a visible light image.

[0039] A plurality of imaging units 10 are provided on the wall surface 300. Fig. 4 shows an example in which three imaging units 10 are provided on the wall surface 300 at intervals from the upstream side to the downstream side. For ease of explanation, these three imaging units 10 will be referred to as the "first imaging unit 11," the "second imaging unit 12," and the "third imaging unit 13" in order from the upstream side (the side closest to the crusher 200).

[0040] In this embodiment, the first imaging unit 11 captures an image of at least the entire surface of the monitored object T being transported on the first conveyor 71. The second imaging unit 12 captures an image of at least the entire surface of the monitored object T being transported on the second conveyor 72 and the entire surface of the monitored object T being transported on a portion of the third conveyor 73. The third imaging unit 13 mainly captures an image of at least the entire surface of the monitored object T being transported on the remaining portion of the third conveyor 73, which is outside the imaging range of the second imaging unit 12. Note that the imaging ranges of the first imaging unit 11, second imaging unit 12, and third imaging unit 13 may overlap with each other. Hereinafter, the setting of the imaging units 10 (first imaging unit 11, second imaging unit 12, third imaging unit 13) that capture the above-mentioned respective regions will be referred to as the "initial setting."

[0041] The settings of the first imaging unit 11, the second imaging unit 12, and the third imaging unit 13 are adjusted by the control device 6. The settings of the imaging unit 10 here include, for example, adjustment of the angle of the imaging direction (tilting of the entire imaging unit 10), adjustment of the angle of view using the wide-angle function (zooming out to capture a smaller image of the monitored object T as a subject within the angle of view), and adjustment of the angle of view using the telephoto function (zooming in to capture a larger image of the monitored object T as a subject within the angle of view). That is, each imaging unit 10 can capture an image of the entire monitored object T on the conveyor 70 using the wide-angle function, and can capture an enlarged image of a portion of the monitored object T on the conveyor 70 using the telephoto function.

[0042] (Fire Prevention Device) The fire prevention device 40 is disposed within the transport space R2 and performs fire prevention treatment on the monitored object T. Although detailed illustration is omitted, the fire prevention device 40 has, for example, a predetermined box shape. A plurality of fire prevention devices 40 are disposed so as to be able to receive the monitored object T transported by each conveyor 70. In other words, the fire prevention device 40 includes a plurality of fire prevention devices 40 installed in different locations. FIG. 4 shows an example in which three fire prevention devices 40 are disposed at intervals within the transport space R2. For ease of explanation, these three fire prevention devices 40 will be referred to as the "first fire prevention device 41," the "second fire prevention device 42," and the "third fire prevention device 43" in order from the upstream side (the side closest to the crusher 200).

[0043] The first fire protection device 41 is disposed upstream of the first conveyor 71 and below the first conveyor 71 in the vertical direction Dv. More specifically, the first fire protection device 41 is located below the upstream end of the first conveyor 71. The second fire protection device 42 is disposed upstream of the third conveyor 73 and below the third conveyor 73 in the vertical direction Dv. More specifically, the second fire protection device 42 is located below the upstream end of the third conveyor 73. At the same time, the second fire protection device 42 is located below the downstream end of the second conveyor 72. The third fire protection device 43 is disposed upstream of the fourth conveyor 74 and below the fourth conveyor 74 in the vertical direction Dv. More specifically, the third fire protection device 43 is located below the upstream end of the fourth conveyor 74. At the same time, the third fire protection device 43 is located below the downstream end of the third conveyor 73. In other words, the fire protection device 40 has a plurality of fire protection devices 40 (first fire protection device 41, second fire protection device 42, third fire protection device 43), and each of the plurality of fire protection devices 40 is arranged so as to be able to receive the monitored object T transported by one or more conveyors 70 included in the plurality of conveyors 70.

[0044] That is, when the first conveyor 71 is operated in the reverse direction, the monitored object T on the first conveyor 71 falls into the first fire protection device 41. When the second conveyor 72 is operated in the forward direction and the third conveyor 73 is operated in the reverse direction, the monitored object T on the second conveyor 72 and the monitored object T on the third conveyor 73 fall into the second fire protection device 42. When the third conveyor 73 is operated in the forward direction and the fourth conveyor 74 is operated in the reverse direction, the monitored object T on the third conveyor 73 and the monitored object T on the fourth conveyor 74 fall into the third fire protection device 43.

[0045] When the fire protection devices 40 (first fire protection device 41 to third fire protection device 43) receive the monitored object T inside, they are activated by the control device 6 to create a closed space (sealed room) hermetically isolated from the outside. The fire protection devices 40 perform fire protection treatment for the received monitored object T, for example, by closing a lid from above to create a closed space inside. That is, the fire protection devices 40 perform fire protection treatment for the received monitored object T using a suffocation fire extinguishing method. Note that instead of performing fire protection treatment for the received monitored object T by creating a closed space inside, the fire protection devices 40 may perform fire protection treatment for the monitored object T by, for example, spraying an inert gas inside. That is, the fire protection devices 40 may perform fire protection treatment for the monitored object T using an elimination fire extinguishing method.

[0046] In this embodiment, the fire protection device 40 has a sensor 40a capable of detecting the temperature of the monitored object T received therein. The sensor 40a is, for example, a temperature sensor disposed inside the fire protection device 40. The sensor 40a transmits the detection result to the control device 6. Note that the sensor 40a of the fire protection device 40 is not limited to a configuration capable of detecting the temperature of the monitored object T, and may be, for example, a smoke sensor or a camera.

[0047] (Transportation Device) The transportation device 9 is activated by the control device 6 to transport the monitored object T stored in each fire protection device 40 to a pit or the like. The transportation device 9 connects each fire protection device 40 to the pit. The transportation device 9 is an example of the device S to be activated.

[0048] (Control Device) The control device 6 remotely controls the activation target devices S (transport device 7, fire protection device 40, and transfer device 9) based on the image received from the imaging unit 10 and the detection result received from the sensor 40a. As shown in Fig. 6 , the control device 6 has, for example, a first acquisition unit 55, a first detection unit 56 (detection unit), an adjustment unit 57, a second detection unit 58, a second acquisition unit 59, an activation unit 60, a criteria derivation unit 61 (derivation unit), a selection unit 62, a determination unit 63, a fire protection processing unit 64, and a memory unit 65.

[0049] (First Acquisition Unit) The first acquisition unit 55 acquires images transmitted from the imaging unit 10 at a predetermined cycle and sends the acquired images to the first detection unit 56, the second detection unit 58, the second acquisition unit 59, and the determination unit 63. The predetermined cycle is determined based on, for example, the frame rate of the imaging unit 10. The first acquisition unit 55 also acquires detection results transmitted from the sensor 40a of the fire protection device 40 and sends the acquired detection results to the determination unit 63.

[0050] (First detection unit) The first detection unit 56 (detection unit) detects a fire source candidate T1 that indicates a possible fire outbreak among the monitored object T shown in the image based on the image received from the first acquisition unit 55. Specifically, the first detection unit 56 detects the position of the fire source candidate T1 by determining whether or not the fire source candidate T1 is present among the monitored object T based on the brightness value of the monitored object T shown in the image. When the first detection unit 56 determines that the fire source candidate T1 is present among the monitored object T, it sends the position of the detected fire source candidate T1 to the adjustment unit 57, the operation unit 60, and the determination unit 63.

[0051] (Adjustment Unit) When the adjustment unit 57 receives notification from the first detection unit 56 that the fire source candidate T1 has been detected, the adjustment unit 57 adjusts the settings of the imaging unit 10. Specifically, the adjustment unit 57 adjusts the settings of the imaging unit 10 so that the imaging unit 10 can mainly capture images of the fire source candidate T1 detected by the first detection unit 56. For example, as shown in FIGS. 4 and 7 , a case will be described in which the fire source candidate T1 is detected on the third conveyor 73 within the imaging range of the third imaging unit 13. The adjustment unit 57 sequentially adjusts the imaging direction of the imaging unit 10 so that it faces the position of the fire source candidate T1 and sequentially adjusts the telephoto function of the imaging unit 10 so that the majority of the angle of view (field of view) of the imaging unit 10 is the fire source candidate T1. In other words, the adjustment unit 57 causes the imaging unit 10 to track the fire source candidate T1 so that the imaging unit 10 continuously captures images of the fire source candidate T1 being transported by the conveyor 70. In other words, when the first detection unit 56 detects the fire source candidate T1, the control device 6 continues sensing of the fire source candidate T1 being transported by the conveyor 70. For ease of explanation, the imaging unit 10 continuously capturing images of the fire source candidate T1 being transported by the conveyor 70 will be referred to as "tracking imaging" below. The adjustment unit 57 sends a signal to the second detection unit 58 that the imaging unit 10 is performing tracking imaging.

[0052] Furthermore, when the result of the determination (first determination) received from the determination unit 63 (described later) indicates that the fire source candidate T1 is present in the image, the adjustment unit 57 adjusts the setting of the imaging unit 10 so that the imaging unit 10 performs tracking imaging. Furthermore, when the adjustment unit 57 receives a notification from the operation unit 60 (described later) that the operation has been switched to normal operation, or when the adjustment unit 57 receives a notification from the fire prevention processing unit 64 (described later) that there is no risk of recurrence of fire, the adjustment unit 57 adjusts the setting of the imaging unit 10 to the above-described initial setting.

[0053] (Second Detection Unit) When the second detection unit 58 receives a notification from the adjustment unit 57 that the imaging unit 10 is performing tracking imaging, the second detection unit 58 determines whether the fire source candidate T1 is a predetermined fire prevention target based on the image received from the first acquisition unit 55. The image used by the second detection unit 58 for detection is an example of second information acquired in more detail than the first information. In this embodiment, the second detection unit 58 detects whether the fire source candidate T1 is a fire prevention target by determining whether a foreign object determination index based on the luminance value of the fire source candidate T1 captured in the image exceeds a predetermined foreign object determination threshold. The foreign object determination index is calculated based on, for example, the maximum luminance value of the fire source candidate T1 captured in the image (i.e., the maximum temperature of the fire source candidate T1), the rate of change of the maximum luminance value of the fire source candidate T1 captured in the image (i.e., the rate of change of the maximum temperature of the fire source candidate T1), the area of ​​the fire source candidate T1 captured in the image, and the rate of change of the area of ​​the fire source candidate T1 captured in the image. The second detection unit 58 calculates the foreign object determination index by, for example, substituting the maximum brightness value of the fire source candidate T1, the rate of change of the maximum brightness value of the fire source candidate T1, the area of ​​the fire source candidate T1, and the rate of change of the area of ​​the fire source candidate T1 into a predetermined calculation formula (e.g., a function). The predetermined calculation formula and foreign object determination threshold value are stored in advance in, for example, the memory unit 65. The second detection unit 58 performs the above detection operation by referencing the predetermined calculation formula and foreign object determination threshold value from the memory unit 65 as appropriate. The second detection unit 58 then sends a signal to the operation unit 60 indicating that the fire source candidate T1 is a fire prevention target.

[0054] FIG. 8 is a graph showing the relationship between the field of view of the imaging unit 10 and the temperature of the detected fire candidate T1 (monitored object T). The "field of view of the imaging unit 10" here refers to a length (m) corresponding to the number of horizontal pixels in the image (e.g., 640 pixels). As shown in FIG. 8, as the field of view of the imaging unit 10 expands, the difference between the temperature of the detected fire candidate T1 and the ambient temperature (the temperature of the monitored object T surrounding the fire candidate T1) decreases. As the field of view narrows to a certain point (A in FIG. 8), the difference between the temperature of the detected fire candidate T1 and the ambient temperature increases. Furthermore, even if the field of view of the imaging device narrows beyond the certain point (A), the difference between the temperature of the detected fire candidate T1 and the ambient temperature remains constant. The inventors found that by measuring the actual temperature (real temperature) of the fire source candidate T1, when the field of view was narrowed to a certain point (A) or below using the telephoto function of the imaging unit 10, the temperature based on the detected brightness value of the fire source candidate T1 matched the actual temperature of the fire source candidate T1.

[0055] (Second Acquisition Unit) When the second acquisition unit 59 receives from the second detection unit 58 information that the fire source candidate T1 is a fire prevention target, the second acquisition unit 59 acquires information about the fire source candidate T1 based on the image received from the first acquisition unit 55. Specifically, the second acquisition unit 59 acquires the temperature of the fire source candidate T1 in the image. The second acquisition unit 59 sends the acquired temperature of the fire source candidate T1 to the criteria derivation unit 61. The second acquisition unit 59 is an example of the acquisition unit 50.

[0056] (Criteria Derivation Unit) The criteria derivation unit 61 (derivation unit) derives criteria based on the temperatures of the multiple fire source candidates T1 on a time series received from the second acquisition unit 59 and the temperature transition of the monitored object T predicted based on a temperature rise profile (actual data) previously acquired for each type of monitored object T. Specifically, the criteria derivation unit 61 selects one simulation result that best matches the temperatures of the multiple fire source candidates T1 on a time series received from the second acquisition unit 59 from multiple simulation results (temperature prediction curves showing the temperature transition of the monitored object T) based on the temperature rise profile for each type of monitored object T previously acquired by a combustion test or the like. The criteria derivation unit 61 derives criteria from the selected simulation result. For example, the criteria derivation unit 61 derives, as the criterion, the time required for the temperature of the fire source candidate T1 indicated in the selected simulation result to reach the temperature at which the monitored object T ignites indicated in the simulation result (the remaining time until the timing of a fire outbreak). Therefore, the criteria indicate the time from when the fire source candidate T1 is detected as a fire prevention target to when the fire breaks out. Multiple simulation results are stored in advance, for example, in the storage unit 65. The criteria derivation unit 61 performs the above-mentioned derivation operation by referring to the multiple simulation results from the storage unit 65 at appropriate times. The criteria derivation unit 61 sends the derived criteria to the selection unit 62. Note that the criteria derivation unit 61 may derive the criteria based on the temperature of one fire source candidate T1 received from the second acquisition unit 59 and a temperature transition of the monitored object T predicted based on a temperature rise profile (actual data) acquired in advance for each type of monitored object T.

[0057] (Selection Unit) The selection unit 62 selects a fire protection device 40 that will accept the fire source candidate T1 based on the criteria received from the criteria derivation unit 61. The selection unit 62 acquires the time required to complete transportation from the location of the fire source candidate T1 to the fire protection device 40 from predetermined correspondence information. Hereinafter, the time required to complete transportation from the location of the fire source candidate T1 to the fire protection device 40 will be referred to as the "transport time." The correspondence information is, for example, a table that associates positions on the conveyor 70 with the time (transport time) required to complete transportation of the monitored object T from the position on the conveyor 70 to a fire protection device 40 that can transport the monitored object T. For example, if the fire source candidate T1 is located on the first conveyor 71, the fire protection device 40 to which the fire source candidate T1 is to be transported is the first fire protection device 41, the second fire protection device 42, or the third fire protection device 43. Furthermore, if the fire source candidate T1 is located on the second conveyor 72 or the third conveyor 73, the fire protection device 40 to which the fire source candidate T1 is to be transported is the second fire protection device 42 or the third fire protection device 43. Furthermore, if the fire source candidate T1 is located on the fourth conveyor 74, the fire protection device 40 to which the fire source candidate T1 is to be transported is the third fire protection device 43. The correspondence information is stored in advance, for example, in the memory unit 65. The selection unit 62 performs the above-mentioned selection operation by referring to the correspondence information from the memory unit 65 as appropriate. In other words, the selection unit 62 selects which of the multiple fire protection devices 40 to use to perform fire protection treatment based on the state of the fire protection target obtained from the detection result of the second detection unit 58.

[0058] Specifically, the selection unit 62 selects a fire protection device 40 whose transport time satisfies a predetermined condition. Here, "satisfying a predetermined condition" means, for example, that the transport time is less than the criterion. For example, when the fire source candidate T1 is located on the third conveyor 73, the selection unit 62 selects the fire protection device 40 from the second fire protection device 42 or the third fire protection device 43 whose transport time is less than the criterion. An example of the relationship between the position of the fire source candidate T1 on the conveyor 70 and the fire protection device 40 to which the fire source candidate T1 is to be transported is shown in FIG. 9 . The selection unit 62 sends the selected fire protection device 40 to the activation unit 60 and the fire protection processing unit 64.

[0059] (Operation Unit) The operation unit 60 operates the transport device 7 to move the fire source candidate T1 toward the fire protection device 40 based on the position of the fire source candidate T1 on the conveyor 70 received from the first detection unit 56 and the fire protection device 40 received from the selection unit 62. For example, if the position of the fire source candidate T1 received from the first detection unit 56 indicates that it is on the first conveyor 71 and the fire protection device 40 received from the selection unit 62 indicates that it is the first fire protection device 41, the operation unit 60 operates the first conveyor 71 in the reverse direction. Furthermore, if the position of the fire source candidate T1 received from the first detection unit 56 indicates that it is on the second conveyor 72 and the fire protection device 40 received from the selection unit 62 indicates that it is the second fire protection device 42, the operation unit 60 operates the second conveyor 72 in the forward direction. In addition, if the position of the fire source candidate T1 received from the first detection unit 56 indicates that it is on the third conveyor 73 and the fire protection device 40 received from the selection unit 62 indicates that it is the second fire protection device 42, the operation unit 60 operates the third conveyor 73 in the reverse direction, and if the position of the fire source candidate T1 indicates that it is on the third conveyor 73 and the received fire protection device 40 indicates that it is the third fire protection device 43, the operation unit 60 operates the third conveyor 73 in the forward direction and the fourth conveyor 74 in the reverse direction.

[0060] Furthermore, when the result of the determination (first determination) received from the determination unit 63 (described later) indicates that the fire source candidate T1 is not present in the image, the operation unit 60 switches each conveyor 70 to the normal operation state. The operation unit 60 notifies the adjustment unit 57 that the conveyors 70 have been switched to the normal operation state.

[0061] (Determination Unit) The determination unit 63 determines whether or not the fire source candidate T1 is present in the image based on the image received from the first acquisition unit 55. Specifically, the determination unit 63 determines whether or not the fire source candidate T1 is present in the image by judging the brightness value in the image. Hereinafter, the result of this determination will be referred to as the "first determination." The determination unit 63 sends the result of the first determination to the operation unit 60 and the fire prevention processing unit 64.

[0062] Furthermore, the determination unit 63 determines whether there is a risk of re-ignition at the monitored object T within the fire prevention device 40 based on the detection result of the sensor 40a received from the first acquisition unit 55. "Re-ignition" here means that a fire will break out at the monitored object T in the future. Specifically, the determination unit 63 determines whether the detection result of the sensor 40a is equal to or greater than a predetermined third threshold. If the detection result of the sensor 40a is equal to or greater than the third threshold, the determination unit 63 determines that there is a risk of re-ignition. On the other hand, if the detection result of the sensor 40a is less than the third threshold, the determination unit 63 determines that there is no risk of re-ignition. Hereinafter, this determination result will be referred to as a "second determination." The third threshold is pre-stored in, for example, the memory unit 65. The determination unit 63 performs the second determination operation by referring to the third threshold from the memory unit 65 as appropriate. The determination unit 63 sends the result of the second determination to the fire prevention processing unit 64.

[0063] (Fire Prevention Processing Unit) When the result of the first determination received from the determination unit 63 indicates that the fire source candidate T1 is not present in the image, the fire prevention processing unit 64 activates the fire prevention device 40 received from the selection unit 62. That is, the fire prevention processing unit 64 activates the fire prevention device 40 received from the selection unit 62, thereby performing fire prevention processing on the monitored object T received by the fire prevention device 40.

[0064] Furthermore, when the result of the second determination received from the determination unit 63 indicates that there is a risk of recurrence, the fire prevention processing unit 64 continues to operate the fire prevention device 40. Furthermore, when the result of the second determination received from the determination unit 63 indicates that there is no risk of recurrence, the fire prevention processing unit 64 activates the transfer device 9. That is, by activating the transfer device 9, the fire prevention processing unit 64 transfers the monitored object T stored in the fire prevention device 40 to a pit or the like. Furthermore, the fire prevention processing unit 64 notifies the adjustment unit 57 that there is no risk of recurrence.

[0065] (Operation of Control Device) Next, an example of the operation of the control device 6 in this embodiment will be described with reference to Fig. 10. However, the order of the processes described below is not limited to the following example, and may be changed as appropriate.

[0066] The adjustment unit 57 adjusts the settings of the imaging unit 10 to the initial settings (step S1). Next, the first acquisition unit 55 acquires images transmitted from the imaging unit 10 at a predetermined interval (step S2). Next, the first detection unit 56 detects the fire source candidate T1 by determining whether or not the fire source candidate T1 is present among the monitored object T shown in the image (step S3). If the fire source candidate T1 is not present among the monitored object T (step S3: NO), the process returns to step S2. On the other hand, if the fire source candidate T1 is present among the monitored object T (step S4: YES), the adjustment unit 57 adjusts the settings of the imaging unit 10 (step S4). Next, the first acquisition unit 55 acquires images transmitted from the imaging unit 10 at a predetermined interval (step S5). Next, the second detection unit 58 detects the fire source candidate T1 by determining whether or not the fire source candidate T1 is a fire prevention target based on the image (step S6). If the fire source candidate T1 is not a fire prevention target (step S6: NO), the process returns to step S4. On the other hand, if the fire source candidate T1 is a fire prevention target (step S6: YES), the criteria derivation unit 61 derives criteria based on the time-series temperatures of the multiple fire source candidates T1 and the predicted temperature transition of the monitored object T (step S7). Next, the selection unit 62 selects a fire protection device 40 to accept the fire source candidate T1 based on the criteria (step S8). Next, the operation unit 60 operates the transport device 7 so that the fire source candidate T1 moves toward the fire protection device 40 that accepts the fire source candidate T1 (step S9). Next, the adjustment unit 57 adjusts the settings of the imaging unit 10 so that the imaging unit 10 continuously captures the transported fire source candidate T1 (step S10). Next, the first acquisition unit 55 acquires images transmitted from the imaging unit 10 at a predetermined interval (step S11). Next, the determination unit 63 determines whether the fire source candidate T1 is present in the image (step S12). If the fire source candidate T1 is present in the image (step S12: YES), the process returns to step S10. On the other hand, if the fire source candidate T1 is not present in the image (step S12: NO), the fire prevention processing unit 64 activates the fire prevention device 40 to perform fire prevention processing on the monitored object T received by the fire prevention device 40 (step S13), and the operation unit 60 switches each conveyor 70 to a normal operation state (step S15). After the process of step S15 is completed, the process returns to step S1.Following the processing of step S13, the determination unit 63 determines whether or not there is a risk of the monitored object T in the fire prevention device 40 re-igniting (step S14). If there is a risk of the monitored object T re-igniting (step S14: YES), the process returns to step S13. On the other hand, if there is no risk of the monitored object T re-igniting (step S14: NO), the fire prevention processing unit 64 activates the transfer device 9 to transfer the monitored object T stored in the fire prevention device 40 to a pit or the like (step S16). The operation of the control device 6 described above is repeatedly executed during operation of the waste treatment plant.

[0067] (Operations and Effects) The above-described fire prevention system 100 detects a fire candidate T1 among the monitored object T that indicates a potential fire, and determines whether the fire candidate T1 is a predetermined fire prevention target based on information acquired about the fire candidate T1 using the telephoto function of the imaging unit 10. This allows for highly accurate detection of locations where a fire is likely to occur before a fire breaks out. Furthermore, in the above-described fire prevention system 100, when the fire candidate T1 on the transport device 7 transporting the monitored object T is detected as a fire prevention target, the transport device 7 is operated to move the fire candidate T1 toward the fire prevention device 40. In other words, the fire candidate T1 is subjected to fire prevention treatment using the function of the transport device 7. Therefore, for example, there is no need to use a device for moving the fire candidate T1. Furthermore, in the above-described fire prevention system 100, the transport device 7 has multiple conveyors 70, and multiple fire prevention devices 40 are arranged to receive the fire candidate T1 transported by each conveyor 70. Therefore, the fire source candidate T1 can be moved to the fire prevention device 40 more quickly. Furthermore, a fire prevention device 40 that accepts the fire source candidate T1 is selected based on criteria indicating the time from when the fire source candidate T1 on the conveyor 70 is detected as a fire prevention target to when a fire breaks out, and the fire source candidate T1 is transported to the selected fire prevention device 40. Therefore, a fire outbreak from the fire source candidate T1 while the fire source candidate T1 is being transported to the fire prevention device 40 can be prevented. Furthermore, the criteria are derived based on the temperatures of multiple fire source candidates T1 over time and the temperature transition of the monitored object T predicted based on a temperature rise profile previously acquired for each type of monitored object T. Therefore, the criteria can be made closer to the time required from when the fire source candidate T1 is detected to when a fire actually breaks out. In other words, the criteria can be more appropriately optimized. Furthermore, the fire prevention device 40 performs fire prevention treatment on the fire source candidate T1 using a smothering fire extinguishing method. This prevents moisture from adhering to the monitored object T compared to, for example, a water sprinkling fire extinguishing method (cooling fire extinguishing method) that uses water. Therefore, for example, events caused by moisture, such as electric leakage from the monitored object T, are unlikely to occur.

[0068] <Third embodiment of fire protection system> Next, a third embodiment of the fire protection system 100 according to the present disclosure will be described. Note that the criteria derivation unit 61 of the third embodiment described below is partially different from the criteria derivation unit 61 described in the second embodiment above. Description of common configurations will be omitted.

[0069] (First Acquisition Unit) In the present embodiment, the first acquisition unit 55 acquires images transmitted from the imaging unit 10 at predetermined intervals and sends the acquired images to the criteria derivation unit 61. The first acquisition unit 55 is an example of the acquisition unit 50.

[0070] (Criteria Derivation Unit) In the present embodiment, the criteria derivation unit 61 derives criteria using a trained model 650 (see FIG. 6 ) that has been trained to output criteria when multiple time-series images (i.e., information acquired about the fire source candidate T1) received from the first acquisition unit 55 are input. The trained model 650 is stored in advance in, for example, the storage unit 65. The criteria derivation unit 61 acquires the output criteria by inputting the multiple time-series images received from the first acquisition unit 55 to the trained model 650 stored in the storage unit 65. The trained model 650 is, for example, a deep learning model (supervised learning model) such as a deep neural network (DNN). The trained model 650 has been trained to output criteria according to the input by repeatedly executing a learning step in which a teacher data set is input, the teacher data set including temperature transitions of the monitored objects T predicted in advance for each type of monitored object T and temperature rise profiles acquired in advance for each type of monitored object T. The predicted temperature transition of the monitored object T is a simulation result (a temperature prediction curve showing the temperature transition of the monitored object T) based on a temperature rise profile (actual data) for each type of monitored object T acquired in advance by a combustion test or the like. The trained model 650 may be a deep learning model such as a convolutional neural network (CNN) or a recurrent neural network (RNN). The criteria derivation unit 61 sends the derived criteria to the selection unit 62. The criteria derivation unit 61 may derive criteria using the trained model 650 that has been trained to output criteria when an image received from the first acquisition unit 55 is input.

[0071] (Operation and Effect) This allows the criteria to be closer to the actual time taken from the time when the fire source candidate T1 is detected until the fire breaks out.

[0072] <Fourth Embodiment of Fire Protection System> Next, a fourth embodiment of the fire protection system 100 according to the present disclosure will be described.

[0073] First, FIG. 11 is a diagram illustrating the state of a monitoring object T on the conveyor 70 as it is transported by the conveyor 70 described above. As shown in FIG. 11 , the conveyor 70 includes, for example, a first portion 70a extending in the direction in which the monitoring object T is transported, and multiple second portions 70b provided on the first portion 70a, each of which holds the monitoring object T together with the first portion 70a. For example, a conveyor belt is provided on the first portion 70a, and the conveyor belt is configured to be able to rotate in a forward or reverse direction. Therefore, the imaging unit 10 captures an image of the surface of the monitoring object T being held and transported by the first portion 70a and the second portion 70b. FIG. 12 is a schematic diagram illustrating the monitoring object T transported by the conveyor 70 shown in FIG. 11 , broken down into multiple circles (◯), and illustrates a state in which an ignition source is contained within the monitoring object T. The ignition source may be, for example, a lithium-ion battery (LIB) that has been subjected to an impact inside the crusher 200, causing structural damage and causing a short circuit, or a metal piece that has been heated by friction inside the crusher 200. Note that the "surrounding garbage" shown in Figure 12 refers to the monitored object T that is located around the ignition source on the conveyor 70 (surrounding the ignition source).

[0074] FIG. 13 is a diagram for explaining the change in state of the monitored object T (fire source candidate T1) conveyed by the conveyor 70 over time for each position of the ignition source within the monitored object T. Note that the conveyor 70 is not shown in FIG. 13. ｄ indicates the time when the fire source candidate T1 was detected in the monitored object T by the first detection unit 51 described above. As shown in FIG. 13, if there is an ignition source in the monitored object T, it can be seen that the temperature of the surface or inside of the fire source candidate T1 rises overall with the passage of time. Also, the "gas generation amount" shown in FIG. 13 means the amount of a specific gas generated from the monitored object T (fire source candidate T1). Vu １ ~Vu ４ , Vm １ ~Vm ５ , and Vd １ ~Vd ７ Each of these Vu indicates the amount of gas generated. １~Vu ４ , Vm １ ~Vm ５ , and Vd １ ~Vd ７ The magnitude relationship between Vu １ <Vu ２ <Vu ３ <Vu ４ , Vm １ <Vm ２ <Vm ３ <Vm ４ , and Vd １ <Vd ２ <Vd ３ <Vd ４ Also, Vu １ <Vm ２ <Vd ４ Therefore, the lower the location of the ignition source is in the monitored object T (fire source candidate T1), the greater the amount of gas generated. Also, "gas concentration" means the concentration of the specific gas generated from the monitored object T (or fire source candidate T1). Cu １ ~Cu ４ , Cm １ ~Cm ５ , and Cd １ ~Cd ７ Each of these Cu １ ~Cu ４ , Cm １ ~Cm ５ , and Cd １ ~Cd ７ The magnitude relationship is Cu １ <Cu ２ <Cu ３ <Cu ４ , Cm １ <Cm ２ <Cm ３ <Cm ４ , and Cd １ <Cd ２ <Cd ３ <Cd ４ In addition, Cu １ <Cm ２ <Cd ４Therefore, the lower the position of the ignition source is within the monitored object T (fire source candidate T1), the higher the concentration of the gas generated from the monitored object T. In other words, depending on the condition of the ignition source, the amount of gas generated and the gas concentration will differ, and the surface condition of the fire source candidate T1 will also differ.

[0075] FIG. 14 shows the correspondence relationship between the time axis and the surface temperature of the monitored object T, as well as the correspondence relationship between the time axis and the heat generation rate of the monitored object T, for each type of monitored object T including an ignition source. The correspondence relationship shown in FIG. 14 is a temperature rise profile (actual data) for each type of monitored object T previously obtained, for example, through a combustion test. Curves (i), (ii), and (iii) shown in FIG. 14 (a) show the change in surface temperature (state change information) over time for different types of monitored object T. That is, it can be seen that the way the surface temperature of the monitored object T rises over time differs depending on the type of monitored object T. Furthermore, curves (i), (ii), and (iii) shown in FIG. 14 (b) show the change in heat generation rate (state change information) over time for different types of monitored object T. Note that curves (i), (ii), and (iii) shown in FIG. 14 are correspondence relationships obtained from the same type of monitored object T. Furthermore, td1 indicates the time when the first detection unit 51 detects the fire source candidate T1 among the monitored objects T corresponding to the curve (i). td2 indicates the time when the first detection unit 51 detects the fire source candidate T1 among the monitored objects T corresponding to the curve (ii). td3 indicates the time when the first detection unit 51 detects the fire source candidate T1 among the monitored objects T corresponding to the curve (iii). Td shown in FIG. 14 indicates the temperature of the fire source candidate T1 detected by the first detection unit 51, and Ti indicates the temperature of the fire source candidate T1 when the fire source candidate T1 ignites. Therefore, the criteria derivation unit 61 described in the second and third embodiments derives criteria based on the temperature rise profile for each type of monitored object T described in this embodiment. The criteria derivation unit 61 is an example of an information processing unit.

[0076] 15 , in this embodiment, the control device 6 further includes a data storage unit 91, an extraction unit 92, an estimation unit 93, a prediction unit 94, a determination unit 95, and a data processing unit 96. The first acquisition unit 55 described above sends the image acquired from the imaging unit 10 to the data storage unit 91.

[0077] (Data Storage Unit) The data storage unit 91 acquires information on a plurality of time points on the time series acquired regarding the fire source candidate T1. Specifically, the data storage unit 91 acquires a plurality of images on the time series of the monitored object T from the imaging unit 1, and stores the acquired plurality of images in, for example, the memory unit 65. The data storage unit 91 also sends the acquired plurality of images on the time series to the extraction unit 92. The data storage unit 91 is an example of an acquisition unit.

[0078] (Extraction Unit) The extraction unit 92 extracts feature amounts based on a plurality of images in a time series received from the data storage unit 91. Specifically, the extraction unit 92 extracts, as the feature amounts, the speed at which the surface temperature distribution of the monitored object T spreads and the rate of change of the maximum surface temperature of the monitored object T from a plurality of images in a time series. The extraction unit 92 sends the extracted feature amounts to the estimation unit 93 and stores the feature amounts in the memory unit 65.

[0079] (Estimation Unit) The estimation unit 93 estimates the temperature distribution of the fire source candidate T1 based on the feature quantities received from the extraction unit 92. Specifically, the estimation unit 93 estimates information about the ignition source of the fire source candidate T1 and the temperature distribution of the fire source candidate T1 based on CFD (Computational Fluid Dynamics) data, which is the result of a fluid analysis of the monitored object T previously acquired, and multiple time-series images previously acquired and stored in the storage unit 65. Here, "information about the ignition source of the fire source candidate T1" refers to, for example, the location of the ignition source within the fire source candidate T1 and the heat generation amount of the ignition source. The CFD data is stored in advance in, for example, the storage unit 65. The estimation unit 93 sends the estimated information about the ignition source of the fire source candidate T1 and the temperature distribution of the fire source candidate T1 to the prediction unit 94.

[0080] (Prediction Unit) The prediction unit 94 predicts the scale of the fire and the state of the fire source candidate T1 at a timing (time) after the above criteria have elapsed, for example, from the timing when the second detection unit 58 detects that the fire source candidate T1 is a fire prevention target, based on the information about the ignition source of the fire source candidate T1 and the temperature distribution of the fire source candidate T1 received from the estimation unit 93, as well as the accuracy rate (described later) and CFD data stored in the memory unit 65. The prediction unit 94 sends the predicted scale of the fire and the state of the fire source candidate T1 to the determination unit.

[0081] (Determination Unit) The determination unit 95 determines the content of fire prevention measures (fire extinguishing method) for the fire source candidate T1 based on the scale of the fire and the state of the fire source candidate T1 received from the prediction unit 94. The determination unit 95 determines one fire extinguishing method from among a plurality of fire extinguishing methods, such as elimination fire extinguishing, smothering fire extinguishing, and water spraying fire extinguishing (cooling fire extinguishing). The determination unit 95 sends the determined fire extinguishing method to the activation unit 60. The determination unit is an example of an information processing unit.

[0082] In this embodiment, the activation unit 60 activates the activation target device S based on the fire extinguishing method received from the determination unit 95. Specifically, when the fire extinguishing method indicates, for example, suffocation extinguishing, the activation unit 60 activates the conveyor 70 to move the fire source candidate T1 to the fire protection device 40, and activates the fire protection device 40 to perform fire prevention treatment on the fire source candidate T1 introduced into the fire protection device 40. The activation unit 60 is an example of a control unit.

[0083] (Data Processing Unit) The data processing unit 96 calculates the accuracy rate of the prediction of the surface condition of the fire source candidate T1 based on the multiple images in time series stored in the memory unit 65 by the data storage unit 91. The accuracy rate is a result expressed as a percentage or the like, showing the degree of agreement between the image of the fire source candidate T1 actually acquired at a time after the above criteria has elapsed from the time when the second detection unit 58 detected the fire source candidate T1 as a fire prevention target and the predicted state of the fire source candidate T1. The data processing unit 96 stores the calculated accuracy rate in the memory unit 65.

[0084] The operations of the above-described processing units (data storage unit 91, extraction unit 92, estimation unit 93, prediction unit 94, decision unit 95, and data processing unit 96) may be realized by, for example, artificial intelligence (AI). In this case, it is sufficient to employ AI (trained model) that implements algorithms such as linear regression, generalized linear model, support vector regression, Gaussian process regression, ensemble method, neural network, random forest, support vector machine, discriminant analysis, naive Bayes, and nearest neighbor method.

[0085] (Operation of the Control Device) Next, an example of the operation of the control device 6 in this embodiment will be described with reference to FIG. 16 . The data storage unit 91 acquires multiple images in a time series (step S20). Next, the extraction unit 92 extracts features based on the multiple images in the time series (step S21). Next, the estimation unit 93 estimates the temperature distribution of the fire candidate T1 from the features (step S22). Next, the prediction unit 94 predicts the scale of the fire and the state of the fire candidate T1 at a time after the above criteria have elapsed from the time when the second detection unit 58 detects that the fire candidate T1 is a fire prevention target, based on information about the ignition source of the fire candidate T1, the temperature distribution of the fire candidate T1, the accuracy rate, and the CFD data (step S23). Next, the determination unit 95 determines a fire extinguishing method for the fire candidate T1 based on the scale of the fire and the state of the fire candidate T1 (step S24). Next, the activation unit 60 activates the activation target device S based on the fire extinguishing method (step S25). The above-described operation of the control device 6 is repeatedly executed during operation of the waste treatment plant.

[0086] (Operation and Effect) According to the above, it is possible to realize an appropriate fire extinguishing operation according to the state of the fire source candidate T1.

[0087] (Other Embodiments) Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, the specific configurations are not limited to those of the respective embodiments, and additions, omissions, substitutions, and other modifications to the configurations are possible within the scope of the gist of the present disclosure.

[0088] The fire prevention system 100 described in the first embodiment may include a detection unit 30 instead of the imaging unit 1. As shown in Fig. 17 , a plurality of detection units 30 are provided on the wall surfaces (e.g., floor surfaces) that define the storage space R1 and on which the monitored object T rests. The detection units 30 are composite sensors that can simultaneously detect the flame and temperature at the fire source candidate T1 and transmit the detection results of the flame and temperature at the fire source candidate T1 to the control device 5. In this case, the first detection unit 51 of the control device 5 simply detects the fire source candidate T1 that shows signs of a fire among the monitored object T based on the detection results of the detection units 30. Furthermore, the detection unit 30 is not limited to the imaging units 1, 10 or the above-described composite sensor, and may be, for example, a temperature sensor capable of detecting the temperature of the monitored object T, a photoelectric sensor capable of detecting light emitted from the monitored object T, a gas sensor capable of detecting the concentration of a specific gas emitted from the monitored object T, i.e., the concentration of a specific gas present in the space surrounding the monitored object T, a sensor capable of detecting microwaves, X-rays, or terahertz waves reflected by the monitored object T, or a combination of these sensors. The detection result of the detection unit 30 is an example of first information obtained by sensing the monitored object T or the space surrounding the monitored object T. Furthermore, the detector 3 may be, instead of a camera, for example, a carbon monoxide sensor (CO sensor), a thermocouple, or a composite sensor capable of detecting flame and temperature.

[0089] Furthermore, the fire prevention device 4 described in the first embodiment may have, for example, a box-shaped partition wall instead of a configuration that ejects inert gas, and the fire candidate T1 may be covered from the outside with the partition wall to perform fire prevention treatment (suffocation fire extinguishing method) on the fire candidate T1 as a fire prevention target. Furthermore, the fire prevention device 4 may be configured to extract only the fire candidate T1 from the monitored object T and transport the extracted fire candidate T1 from the storage space R1. Covering the fire candidate T1 from the outside with a partition wall and transporting the fire candidate T1 are examples of fire prevention treatment.

[0090] Furthermore, the first detection unit 51 described in the first embodiment may detect smoke generation in an image, thereby detecting a fire source candidate T1 that indicates a possible fire outbreak among the monitored object T in the image. In this case, the fire source candidate T1 is, for example, a location in the monitored object T in the image where smoke is beginning to be generated.

[0091] Furthermore, instead of the moving device 2 described in the first embodiment being configured to move itself within the storage space R1, it may be a device that moves the monitored object T. In this case, for example, the detector 3 may not be provided on the moving device 2 but may be provided at a predetermined location, and the moving device 2 (e.g., a transport device) may move the monitored object T so that it approaches the detector 3, thereby detecting the fire source position T2 of the fire source candidate T1.

[0092] Furthermore, the fire protection devices 4, 40 described in the first and second embodiments may include a first fire protection device that uses an elimination fire extinguishing method or a suffocation fire extinguishing method and a second fire protection device that uses a water sprinkling fire extinguishing method (cooling fire extinguishing method). In this case, the control devices 5, 6 (e.g., the selection unit 62 in the second embodiment) may select which of the multiple fire protection devices 40 to use to perform fire prevention measures based on the state of the fire protection target obtained from the detection result of the second detection unit 58. In other words, the control devices 5, 6 may select a fire protection device 40 that can execute an appropriate fire extinguishing method from among the multiple fire protection devices 40 that use different fire extinguishing methods.

[0093] Furthermore, the second information (images used by the second detection units 52, 58 for detection) described in the first and second embodiments may be acquired by enlarging the results of sensing by the imaging units 1, 10. Specifically, the control devices 5, 6 may acquire second information that is more detailed than the first information by enlarging the images captured by the imaging units 1, 10. When the spatial and temporal resolution in the storage space R1 or the transfer space R2 is poor, the control devices 5, 6 may achieve the enlarging process by, for example, interpolating data using an interpolation function. That is, when the first detection unit 51, 56 detects the fire source candidate T1, the control devices 5, 6 may achieve the enlarging process by software-based image processing (correction) that narrows the angle of view (field of view) of the image containing the fire source candidate T1 to increase the resolution.

[0094] 18 is a hardware configuration diagram showing the configuration of a computer 1100 according to this embodiment. The computer 1100 includes a processor 1110, a main memory 1120, a storage 1130, and an interface 1140.

[0095] The control devices 5 and 6 are implemented in one or more computers 1100. The operations of the above-described processing units are stored in the storage 1130 in the form of a program. The processor 1110 reads the program from the storage 1130, loads it into the main memory 1120, and executes the above-described processing in accordance with the program. The processor 1110 also allocates storage areas in the main memory 1120 corresponding to the above-described storage units 54 and 65 in accordance with the program. The program may be for implementing part of the functions to be performed by the computer 1100. For example, the program may be combined with other programs already stored in the storage 1130 or other programs implemented in other devices to perform the functions. The computer 1100 may also include a custom large-scale integrated circuit (LSI) such as a programmable logic device (PLD) in addition to or instead of the above configuration. Examples of PLDs include programmable array logic (PAL), generic array logic (GAL), complex programmable logic devices (CPLD), and field programmable gate arrays (FPGA). In this case, some or all of the functions implemented by processor 1110 may be implemented by the integrated circuit.

[0096] Examples of storage 1130 include a magnetic disk, a magneto-optical disk, and a semiconductor memory. Storage 1130 may be an internal medium directly connected to the bus of computer 1100, or an external medium connected to computer 1100 via interface 1140 or a communication line. Furthermore, if this program is distributed to computer 1100 via a communication line, computer 1100 that receives the program may deploy the program in main memory 1120 and execute the above-described processing. In the above embodiment, storage 1130 is a non-transitory tangible storage medium. Furthermore, the program may be for realizing part of the above-described functions. Furthermore, the program may be a so-called differential file (differential program) that realizes the above-described functions in combination with another program already stored in storage 1130.

[0097] <Additional Notes> The fire protection system 100 described in each embodiment can be understood, for example, as follows.

[0098] (1) The fire prevention system 100 according to the first aspect includes a first detection unit 51, 56 that detects a potential fire source T1 among the monitored object T that indicates a possible fire outbreak based on first information obtained by sensing the monitored object T or the space surrounding the monitored object T, and a second detection unit 52, 58 that detects whether the potential fire source T1 is a specified fire prevention target based on second information obtained in more detail than the first information about the fire source candidate T1 detected by the first detection unit 51, 56.

[0099] This makes it possible to detect areas where a fire is likely to break out with high accuracy before a fire occurs.

[0100] (2) The fire prevention system 100 according to the second aspect is the fire prevention system 100 of (1), further comprising at least one of an imaging unit 1, 10 that performs the sensing by imaging the monitored object T or the space around the monitored object T, and a mobile device 2 that reduces the distance between the detector 3 and the potential fire source T1, and the second information may be acquired using the telephoto function of the mobile device 2 or the imaging unit 1, 10.

[0101] (3) The fire prevention system 100 according to the third aspect may be the fire prevention system 100 of (1) or (2), and may further include a fire prevention device 4 that performs fire prevention treatment on the fire prevention target, and control devices 5 and 6 that cause the fire prevention device 4 to perform fire prevention treatment when the second detection units 52 and 58 detect that the fire source candidate T1 is the fire prevention target.

[0102] This can prevent a fire from breaking out at the monitored object T.

[0103] (4) The fire prevention system 100 relating to the fourth aspect is any one of the fire prevention systems 100 of (1) to (3), and further includes an imaging unit 1, 10 that performs the sensing by imaging the monitored object T or the space around the monitored object T, and the second information may be obtained by enlarging the results of the sensing by the imaging unit 1, 10.

[0104] (5) The fire prevention system 100 according to the fifth aspect is the fire prevention system 100 of (3), wherein the fire prevention devices 40 include a plurality of fire prevention devices 40 installed at different locations, and the control device 6 may select which of the plurality of fire prevention devices 40 to use to perform the fire prevention processing based on the state of the fire prevention target obtained from the detection results of the second detection units 52, 58.

[0105] (6) The fire prevention system 100 according to the sixth aspect is the fire prevention system 100 of (3), wherein the fire prevention devices 40 include a plurality of fire prevention devices 40 with different fire extinguishing methods, and the control device 6 may select which of the plurality of fire prevention devices 40 to use to perform the fire prevention treatment based on the state of the fire prevention target obtained from the detection results of the second detection units 52, 58.

[0106] (7) The fire protection system 100 according to the seventh aspect is the fire protection system 100 of (6), wherein the plurality of fire protection devices 40 may include a first fire protection device that uses an elimination fire extinguishing method or a suffocation fire extinguishing method, and a second fire protection device that uses a water spray fire extinguishing method.

[0107] (8) The fire prevention system 100 relating to the eighth aspect may be any one of the fire prevention systems 100 of (1) to (7), and may further include a transporting device 7 that transports the monitored object T, a fire prevention device 40 that receives the monitored object T transported by the transporting device 7 and performs fire prevention treatment on the received monitored object T, and a control device 6 that controls the transporting device 7 so that the fire source candidate T1 moves toward the fire prevention device 40 when the second detection unit 58 detects that the fire source candidate T1 on the transporting device 7 is the fire prevention target.

[0108] As a result, the fire source candidate T1 is subjected to fire prevention treatment using the function of the transport device 7 that transports the monitored object T, so there is no need to use, for example, a device to move the fire source candidate T1.

[0109] (9) The fire prevention system 100 according to the ninth aspect is the fire prevention system 100 of (8), and the control device 6 may continue the sensing of the fire source candidate T1 being transported by the transport device 7 when the fire source candidate T1 is detected by the first detection unit 56.

[0110] (10) The fire prevention system 100 according to the tenth aspect is the fire prevention system 100 of (8), wherein the conveying device 7 has a plurality of conveyors 70 each conveying the monitored object T, the fire prevention device 40 has a plurality of fire prevention devices 40, and each of the plurality of fire prevention devices 40 may be positioned to be able to accept the monitored object T conveyed by one or more conveyors 70 included in the plurality of conveyors 70.

[0111] This allows the fire source candidate T1 to be moved to the fire protection device 40 more quickly.

[0112] (11) The fire prevention system 100 according to the eleventh aspect is the fire prevention system 100 of (10), in which, when the second detection unit 58 detects that the fire source candidate T1 on the conveying device 7 is the fire prevention target, the control device 6 may select a fire prevention device 40 from among the plurality of fire prevention devices 40 to accept the fire prevention target based on a criterion indicating the time from the time of detection to the time of the fire outbreak.

[0113] This makes it possible to prevent a fire from breaking out from the fire source candidate T1 while the fire source candidate T1 is being transported to the fire prevention device 40.

[0114] (12) The fire prevention system 100 according to the 12th aspect is the fire prevention system 100 of (11), wherein the control device 6 may derive the criteria based on the second information acquired regarding the fire source candidate T1 and the temperature trend of the monitored object T predicted based on a temperature rise profile acquired in advance for each type of monitored object T.

[0115] This allows the criteria to be closer to the time required from the time when the fire source candidate T1 is detected until the actual occurrence of a fire.

[0116] (13) The fire prevention system 100 according to the thirteenth aspect is the fire prevention system 100 of (12), wherein the control device 6 derives the criteria using a trained model 650 trained to output the criteria when the second information acquired regarding the fire source candidate T1 is input, and the trained model 650 may be trained to output the criteria according to the input by repeatedly executing a learning step in which a teacher data set is input that includes at least one of a temperature trend of the monitored object T predicted in advance for each type of the monitored object T and a temperature rise profile acquired in advance for each type of the monitored object T.

[0117] This allows the criteria to be closer to the time it takes from the time when the fire source candidate T1 is detected until the actual occurrence of a fire.

[0118] (14) The fire prevention system 100 according to the fourteenth aspect is any one of the fire prevention systems 100 of (3) to (13), and the control device 6 may have an acquisition unit that acquires the second information at multiple points in time on the time series acquired for the fire source candidate T1, and an information processing unit that derives at least one of the remaining time until the timing of the fire outbreak for the fire source candidate and the content of the fire prevention treatment for the fire source candidate based on state change information indicating the change in state over time until the outbreak of a fire obtained by experiment or simulation for multiple ignition sources with different circumstances, or a trained model that has been trained using the state change information, and the second information at multiple points in time on the time series acquired by the acquisition unit.

[0119] (15) The fire prevention system 100 according to the fifteenth aspect includes a detection unit that detects a potential fire source T1 among the monitored object T that indicates a possible fire outbreak based on the results of sensing the monitored object T or the space surrounding the monitored object T, and a derivation unit that derives the time from the time the fire source candidate T1 is detected to the time the fire breaks out based on at least information acquired about the fire source candidate T1.

[0120] According to the present disclosure, it is possible to provide a fire prevention system that enables responses to locations where a fire is likely to occur before a fire occurs.

[0121] REFERENCE SIGNS LIST 1, 10...imaging unit 2...moving device 3...detector 4, 40...fire prevention device 5, 6...control device 7...conveying device 8...chute unit 8a...surface 8g...guiding unit 8h...receiving opening 9...transfer device 11...first imaging unit 12...second imaging unit 13...third imaging unit 30...detection unit 40a...sensor 41...first fire prevention device 42...second fire prevention device 43...third fire prevention device 50...acquisition unit 51, 56...first detection unit 52, 58...second detection unit 53, 60...operation unit 54, 65...storage unit 55...first acquisition unit 57...adjustment unit 59...second acquisition unit 61...criteria derivation unit 62...selection unit 63...determination unit 64...fire prevention treatment unit 70...conveyor 70a...first part 70b...second part 71...first conveyor 72...second conveyor 73...third conveyor 74...fourth conveyor 80d...second opening 80h...supply hole 80u...first opening 91...data storage unit 92...extraction unit 93...estimation unit 94...prediction unit 95...determination unit 96...data processing unit 100...fire prevention system 200...crusher 300...wall surface 531...first operation unit 532...second operation unit 650...trained model 651...first judgment unit 652...second judgment unit 653...third judgment unit 654...fourth judgment unit 1100...computer 1110...processor 1120...main memory 1130...storage 1140...interface Dv...vertical direction R1...storage space R2...transport space S...Device to be activated T...Object to be monitored T1...Possible source of fire T2...Location of source of fire W1, W2...Width

Claims

1. A fire prevention system comprising: a first detection unit that detects potential fire sources within a monitored object that are signs of a fire based on first information obtained by sensing the monitored object or the space surrounding the monitored object; and a second detection unit that detects whether the potential fire sources detected by the first detection unit are designated fire prevention targets based on second information obtained in more detail than the first information regarding the potential fire sources detected by the first detection unit.

2. A fire prevention system as described in claim 1, further comprising at least one of: an imaging unit that performs the sensing by capturing an image of the monitored object or the space surrounding the monitored object; and a mobile device that reduces the distance between the detector and the suspected fire source, wherein the second information is obtained using the telephoto function of the mobile device or the imaging unit.

3. A fire prevention system as described in claim 1, further comprising: a fire prevention device that performs fire prevention treatment on the fire prevention target; and a control device that causes the fire prevention device to perform the fire prevention treatment when the second detection unit detects that the fire source candidate is the fire prevention target.

4. A fire prevention system as described in claim 3, further comprising an imaging unit that performs the sensing by capturing an image of the monitored object or the space surrounding the monitored object, and the second information is obtained by enlarging the results of the sensing by the imaging unit.

5. A fire prevention system as described in claim 3, wherein the fire prevention devices include a plurality of fire prevention devices installed at different locations, and the control device selects which of the plurality of fire prevention devices to use to perform the fire prevention treatment based on the state of the fire prevention target obtained from the detection result of the second detection unit.

6. A fire protection system as described in claim 3, wherein the fire protection device includes a plurality of fire protection devices with different fire extinguishing methods, and the control device selects which of the plurality of fire protection devices to use to perform the fire protection treatment based on the state of the fire protection object obtained from the detection result of the second detection unit.

7. The fire protection system according to claim 6, wherein the plurality of fire protection devices include a first fire protection device that uses an elimination fire extinguishing method or a smothering fire extinguishing method, and a second fire protection device that uses a water spray fire extinguishing method.

8. A fire prevention system as described in any one of claims 1 to 7, further comprising: a transport device that transports the monitored object; a fire prevention device that receives the monitored object transported by the transport device and performs fire prevention treatment on the received monitored object; and a control device that controls the transport device so that the fire source candidate moves toward the fire prevention device when the second detection unit detects that the fire source candidate on the transport device is the fire prevention target.

9. A fire prevention system as described in claim 8, wherein the control device continues the sensing of the fire candidate being transported by the transport device when the fire candidate is detected by the first detection unit.

10. A fire protection system as described in claim 8, wherein the transport device has a plurality of conveyors each transporting the object to be monitored, and the fire protection device has a plurality of fire protection devices, each of which is positioned to be able to accept the object to be monitored transported by one or more conveyors included in the plurality of conveyors.

11. A fire prevention system as described in claim 10, wherein when the second detection unit detects that the fire source candidate on the transport device is the fire prevention target, the control device selects a fire prevention device from among the plurality of fire prevention devices to accept the fire prevention target based on a criterion indicating the time from the time of detection to the time of the fire outbreak.

12. A fire prevention system as described in claim 11, wherein the control device derives the criteria based on the second information acquired regarding the fire source candidate and the temperature change of the monitored object predicted based on a temperature rise profile acquired in advance for each type of monitored object.

13. The fire prevention system described in claim 12, wherein the control device, when inputted with the second information acquired regarding the fire source candidate, derives the criteria using a trained model trained to output the criteria, and the trained model is trained to output the criteria according to the input by repeatedly executing a learning step in which a teacher dataset is inputted that includes at least one of: a temperature trend of the monitored object predicted in advance for each type of monitored object; and a temperature rise profile acquired in advance for each type of monitored object.

14. A fire prevention system as described in any one of claims 3 to 7, wherein the control device has: an acquisition unit that acquires the second information at multiple points in time on the time series regarding the fire source candidate; and an information processing unit that derives at least one of the remaining time until the timing of fire outbreak regarding the fire source candidate and the content of fire prevention measures for the fire source candidate, based on state change information indicating the change in state over time until the outbreak of a fire determined by experiment or simulation regarding multiple ignition sources with different circumstances, or a trained model that has been trained using the state change information, and the second information at multiple points in time on the time series acquired by the acquisition unit.

15. A fire prevention system comprising: a detection unit that detects a potential fire source within a monitored object that indicates a potential fire based on information obtained by sensing the monitored object or the space surrounding the monitored object; and a derivation unit that derives the remaining time until the fire occurs after the potential fire source is detected based on at least the information obtained regarding the potential fire source.

Images