Fire prevention system

Abstract

To provide a fire protecting system that enables measures to be taken before a fire occurs in an area where a fire is likely to occur.SOLUTION: A fire protecting system comprises: a first detection unit that detects a potential fire source which is a sign of a fire among monitoring objects based on first information obtained by sensing a monitoring object or a space around the monitoring object; and a second detection unit that detects whether the potential fire source detected by the first detection unit is a predetermined fire prevention object based on second information acquired in detail in comparison with the first information.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a fire protection system.

Background Art

[0002] Patent Document 1 discloses waste treatment equipment including a crusher for crushing waste, a conveyor for transporting the crushed waste, and a chute for guiding the waste from downstream of the conveyor to the next process. The fire protection device of the waste treatment equipment includes a blocking means for blocking the passage of the chute by a signal from a fire and / or explosion detection means provided on the conveyor, and a water spraying means for filling the blocked chute with water.

[0003] Patent Document 2 discloses a monitoring system for transmitting image data output from an infrared camera to a receiving terminal connected on a network. The receiving terminal has a fire detection means for detecting a fire from the transmitted image data and a display means for displaying the fire information detected by the fire detection means.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when a fire occurs in waste, it may take time to recover the equipment in the response after the fire occurs. Therefore, a technology for coping with a place where a fire is likely to occur before the fire occurs is expected.

[0006] This disclosure is made to solve the above-mentioned problems and aims to provide a fire prevention system that enables responses to fires before they occur in areas where fires are likely to occur. [Means for solving the problem]

[0007] To solve the above problems, the fire prevention system according to this disclosure includes a first detection unit that detects potential fire sources within the monitored object based on first information obtained by sensing the monitored object or the space surrounding the monitored object, and a second information obtained with more detail than the first information regarding the fire source candidates detected by the first detection unit. The rate of change of the brightness value included Based on this, it includes a second detection unit that detects whether the candidate fire source is a predetermined fire-protected object.

[0008] The fire prevention system relating to this disclosure includes a detection unit that detects potential fire sources within the monitored object based on information obtained by sensing the monitored object or the space surrounding the monitored object, and information obtained with respect to at least the potential fire sources. The rate of change of the brightness value included The system includes a deduction unit that, based on the above, derives the remaining time from the detection of the potential fire source until the timing of the fire's occurrence. [Effects of the Invention]

[0009] According to this disclosure, it is possible to provide a fire prevention system that enables preventative measures to be taken before a fire occurs in areas where a fire is likely to occur. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram of the fire protection system according to the first embodiment of this disclosure. [Figure 2] This is a functional block diagram of a control device according to the first embodiment of this disclosure. [Figure 3] A flowchart illustrating an example of the operation of a control device according to the first embodiment of this disclosure. [Figure 4]It is a schematic configuration diagram of a fire prevention system according to the second embodiment of the present disclosure. [Figure 5] It is a perspective view showing a part of a conveying device and a chute part according to the second embodiment of the present disclosure. [Figure 6] It is a functional block diagram of a control device according to the second embodiment of the present disclosure. [Figure 7] It is a diagram for explaining the state of follow-up imaging of an imaging unit by an adjustment unit according to the second embodiment of the present disclosure. [Figure 8] It is a graph showing the relationship between the visual field range of an imaging unit and the temperature of a detected monitoring object according to the second embodiment of the present disclosure. [Figure 9] It is a diagram showing the fire prevention device at the conveyance destination of a fire source candidate according to the second embodiment of the present disclosure in association with the position on a conveyor. [Figure 10] It is a flowchart showing an example of the operation of a control device according to the second embodiment of the present disclosure. [Figure 11] It is a diagram showing the state of a monitoring object on a conveying device according to the fourth embodiment of the present disclosure. [Figure 12] It is a diagram schematically showing the state when an ignition source is included in a monitoring object on a conveying device according to the fourth embodiment of the present disclosure. [Figure 13] It is a diagram for explaining the state change of a fire source candidate over time for each position of an ignition source. [Figure 14] It is a diagram showing the correspondence relationship between the time axis and the surface temperature (a), and the correspondence relationship between the time axis and the heat generation rate (b) for each type (i to iii) of a monitoring object including an ignition source. [Figure 15] It is a functional block diagram of a control device according to the fourth embodiment of the present disclosure. [Figure 16] It is a flowchart showing an example of the operation of a control device according to the fourth embodiment of the present disclosure. [Figure 17] It is a schematic configuration diagram of a fire prevention system according to other embodiments of the present disclosure. [Figure 18] It is a hardware configuration diagram showing the configuration of a computer according to an embodiment of the present disclosure.

Best Mode for Carrying Out the Invention

[0011] Hereinafter, a mode for implementing the fire prevention system 100 will be described while referring to the accompanying drawings.

[0012] <First Embodiment of Fire Prevention System> The fire prevention system 100 is, for example, a system that operates in a waste treatment plant that treats, as objects to be treated, municipal waste, industrial waste, and the like. The fire prevention system 100 prevents a fire from occurring in the objects to be treated that are treated in the waste treatment plant. In the description in this specification, the objects to be treated that are 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 moving 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 entirely images the surface of the monitored object T stored in a predetermined space from the upper side in the vertical direction Dv. Hereinafter, the predetermined space in which the monitored object T is stored is referred to as a "storage space R1". The imaging unit 1 generates a visible light image of the surface of the monitored object T stored in the storage space R, and transmits the generated visible light image to the control device 5 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] (Moving Device) The moving device 2 is a device that can move within the storage space R1. The moving device 2 can perform an operation of approaching the monitored object T and an operation of separating from the monitored object T. The moving device 2 moves within the storage space R1 at a position closer to the monitored object T than the imaging unit 1. In the present embodiment, the moving device 2 can travel, for example, on the floor surface that defines the storage space R1. The movement operation of the moving device 2 is controlled by the control device 5. The moving device 2 is an example of an operating 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 images a portion of the surface of the object T when the mobile device 2 approaches the object T. The detector 3 captures an image of a region of the object T that is narrower than the area that the imaging unit 1 can capture. The detector 3 generates a visible light image of a portion of the surface of the 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 infrared or ultraviolet images instead of a camera that generates visible light images. Hereinafter, the visible light image transmitted by the imaging unit 1 and the detector 3 to the control device 5 will simply be referred to as "image". This image is an example of first information obtained by sensing the object T.

[0016] (Fire protection device) The fire protection device 4 is installed on the mobile device 2 and provides fire protection treatment to the monitored object T. In this embodiment, the fire protection device 4 is controlled by the control device 5 and can spray inert gas in a predetermined direction (the direction in which the monitored object T is located). That is, the fire protection device 4 provides fire protection treatment to the monitored object T using a removal fire extinguishing method. Spraying with inert gas is one example of the fire protection treatment described above. The fire protection device 4 is also an example of the device S that is activated.

[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 Figure 2, the control device 5 includes, 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 Department) The acquisition unit 50 acquires images transmitted from the imaging unit 1 at predetermined intervals and sends the acquired images from the imaging unit 1 to the first detection unit 51, and acquires images transmitted from the detector 3 and sends the acquired images from the detector 3 to the second detection unit 52. The predetermined interval is determined, for example, based on the frame rate (fps: frames per second) of the imaging unit 1.

[0019] (First detection unit) The first detection unit 51 detects a potential fire source T1 within the monitored object T shown in the image, based on the image received from the acquisition unit 50. In this specification, "potential fire source T1" means that there is a possibility of a fire occurring in the future. Furthermore, "potential fire source T1" refers to a region within the monitored object T shown in the image, and all of the brightness values ​​shown by that region are greater than or equal to a predetermined first threshold value than the brightness values ​​shown by the surrounding region. In this embodiment, as the surface temperature of the monitored object T increases, the brightness value of the region in the image where the monitored object T is captured increases. In other words, the potential fire source T1 in the image indicates a region within the monitored object T shown in the image that has a relatively high temperature. The first threshold value is stored in advance, for example, by the storage unit 54. The first detection unit 51 performs the above detection operation by referencing the first threshold value from the storage unit 54 in a timely manner. Specifically, the first detection unit 51 detects the position of the fire source candidate T1 (for example, the center or outer edge of the fire source 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 its position within the storage space R1, for example. The first detection unit 51 sends the position of the fire source candidate T1 to the operating unit 53.

[0020] (Second detection unit) The second detection unit 52 detects whether the fire source candidate T1 is a predetermined fire-protected object 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 that has been acquired in more detail than the first information. In this specification, "predetermined fire-protected object" means a location where a fire may occur in the future (fire source) and where fire protection treatment by the fire protection device 4 is required. The second detection unit 52 determines whether the brightness value of the fire source candidate T1 shown in the image exceeds a predetermined second threshold, and if the brightness value exceeds the second threshold, it acquires the location of the fire source candidate T1 where the second threshold is exceeded. Hereinafter, the location of the fire source candidate T1 where the second threshold is exceeded will be referred to as the "fire source location T2". The second threshold is, for example, greater than the first threshold. The second threshold is stored in advance by, for example, the storage unit 54. The second detection unit 52 performs the above detection operation by referencing the second threshold from the storage unit 54 in a timely manner. Each pixel in the image that the second detection unit 52 detects is associated with coordinates that represent, for example, its position within the storage space R1. The second detection unit 52 sends the fire source position T2 to the operating unit 53.

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

[0022] When the first operating unit 531 receives the position of the potential fire source T1 from the first detection unit 51, it activates the moving device 2 to bring the moving device 2 closer to the potential fire source T1 (see (a) and (b) in Figure 1). Specifically, the first operating unit 531 moves the moving device 2 to the vicinity of the potential fire source T1 and operates the moving device 2 so that the direction of the inert gas ejected by the fire prevention device 4 is directed toward the potential fire source T1.

[0023] When the second operating unit 532 receives the fire source location T2 from the second detection unit 52, it activates the fire prevention device 4 to fire-prevent the monitored object T located at the fire source location T2. ​​Specifically, the second operating unit 532 transmits an instruction to the fire prevention device 4 to spray inert gas toward the fire source location T2, thereby performing fire-prevention on the monitored object T located at the fire source location T2.

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

[0025] The acquisition unit 50 acquires an image of the object T to be monitored from the imaging unit 1 (step S100). Next, the first detection unit 51 detects the potential fire source T1 within the object T to be monitored (step S101). Next, the operation unit 53 activates the moving device 2 (step S102). Next, the acquisition unit 50 acquires an image of the object T to be monitored from the detector 3 (step S103). Next, the second detection unit 52 detects whether or not the potential fire source T1 is a fire-prevention target (step S104). Next, the operation unit 53 activates the fire prevention device 4 (step S105). The operation of the control device 5 described above is repeatedly executed while the waste treatment plant is in operation.

[0026] (Effects / Actions) In the fire prevention system 100 described above, a potential fire source T1 with signs of impending fire is detected within the monitored object T. Based on the information acquired regarding the potential fire source T1 using a mobile device 2 equipped with a detector 3, it is determined whether or not the potential fire source T1 is a designated fire-protected object. This allows for highly accurate detection of areas where fires are likely to occur before they actually start. Furthermore, in the fire prevention system 100, if a potential fire source T1 is detected as a fire-protected object, the fire prevention device 4 is activated to apply fire protection measures to the fire-protected potential fire source T1. Therefore, the occurrence of fires in the monitored object T can be suppressed.

[0027] <Second embodiment of the fire prevention system> Next, a second embodiment of the fire prevention system 100 according to this disclosure will be described. In the second embodiment described below, components common to the first embodiment described above are denoted by the same reference numerals in the figures and their descriptions are omitted.

[0028] As shown in Figure 4, the fire prevention system 100 includes, for example, a control device 6, a transport device 7, a chute section 8, a transfer device 9, an imaging unit 10, and a fire prevention device 40. First, the configuration of the transport device 7 will be described.

[0029] (Conveyor device) The conveying device 7 receives the object to be monitored T, which has been crushed by the crusher 200, from the crusher 200 and conveys the object to be monitored T to the target location. In this embodiment, the conveying device 7 is located in a space defined by a plurality of wall surfaces 300, and conveys the object to be monitored T within this space. The wall surfaces 300 are, for example, part of the equipment in a waste treatment plant. Hereinafter, the space in which the conveying device 7 is located and the object to be monitored T is conveyed by the conveying device 7 will be referred to as the "conveying space R2". The conveying device 7 is an example of a moving device 2.

[0030] The conveying device 7 has multiple conveyors 70. Each of the multiple conveyors 70 conveys the object to be monitored T. In Figure 4, one example is shown where four conveyors 70 are arranged in a line in the direction in which the conveying space R2 extends. That is, the object to be monitored T that has been conveyed on one conveyor 70 falls onto the conveyor 70 adjacent to that conveyor 70 and is conveyed by that adjacent conveyor 70. For the sake of explanation, these four conveyors 70 will be referred to as "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 closer to the crusher 200 within the conveying space R2 may be referred to as the "upstream side," and the side closer to the target location, away from the crusher 200, may be referred to as the "downstream side."

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

[0032] The widths (W2 shown in Figure 5) of the second conveyor 72, the third conveyor 73, and the fourth conveyor 74 are equal. Hereinafter, these second conveyor 72, third conveyor 73, and fourth conveyor 74 may be collectively referred to as "other conveyors 70". Here, "width" refers to the dimension in the width direction of the conveyor 70 (the direction that intersects the vertical direction Dv and is perpendicular to the direction in which the object to be monitored T is transported). On the other hand, the width of the first conveyor 71 (W1 shown in Figure 5) is greater than the width of the other conveyors 70. The width of the first conveyor 71 is, for example, more than twice the width of the other conveyors 70. Note that the width of the first conveyor 71 may be greater than 1 times the width of the other conveyors 70, but less than 2 times.

[0033] The operation of each conveyor 70 (the first to fourth conveyors 71 to 74) is controlled by the control device 6, which will be described later. Specifically, the control device 6 controls the starting (start of operation), maintenance of operation, and stopping (end of operation) of the conveyors 70. The control device 6 uses two methods: 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 Figure 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 transport speeds of the second conveyor 72, the third conveyor 73, and the fourth conveyor 74 are equal to each other. On the other hand, the transport speed of the first conveyor 71 is lower than the transport speeds of the other conveyors 70. The conveying speed of the first conveyor 71 is, for example, 0.5 times or less the conveying speed of the other conveyors 70. However, the conveying speed of the first conveyor 71 may be greater than, for example, 0.5 times the conveying speed of the other conveyors 70, but less than 1 time. Hereinafter, the state in which each conveyor 70 (first conveyor 71 to fourth conveyor 74) is operating in the forward direction will be referred to as "normal operation," and the state in which it is operating in the reverse direction will be referred to as "abnormal operation." The conveying device 7 (first conveyor 71 to fourth conveyor 74) is an example of the device S to be operated.

[0034] (Shooting Club) The chute section 8 temporarily receives and stores the objects T to be monitored that have fallen from the first conveyor 71, and then supplies the stored objects T onto the second conveyor 72 from above in the vertical direction Dv. The chute section 8 is positioned between the first conveyor 71 and the second conveyor 72.

[0035] As shown in Figure 5, the chute section 8 has a predetermined box shape. The chute section 8 has a supply hole 80h formed in a rectangular shape when viewed from the vertical direction Dv in the central part. 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 partitioned on the inner surface of the supply hole 80h is formed uniformly in the vertical direction Dv. The supply hole 80h may be formed to narrow from the first opening 80u toward the second opening 80d. Also, the supply hole 80h does not have to be formed in a rectangular shape when viewed from the vertical direction Dv; for example, it may be formed in a circular shape or a polygon other than a rectangle. The width of the second opening 80d is formed to be 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] Furthermore, the chute section 8 is connected to the first opening 80u and has a guide section 8g whose cross-sectional area perpendicular to the vertical direction Dv expands as it moves upward in the vertical direction Dv. In this embodiment, the guide section 8g is composed of four surfaces 8a. These four surfaces 8a are connected to each other by adjacent surfaces, forming a receiving opening 8h at the uppermost side of the chute section 8. The width of the receiving opening 8h is formed to be equal to, for example, the width W1 of the first conveyor 71. However, the width of the receiving opening 8h may be formed to be larger than the width W1 of the first conveyor 71.

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

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

[0039] Multiple imaging units 10 are provided on the wall surface 300. In Figure 4, one example is shown where three imaging units 10 are provided on the wall surface 300 at intervals from the upstream side to the downstream side. For the sake of explanation, these three imaging units 10 will be referred to as "first imaging unit 11," "second imaging unit 12," and "third imaging unit 13," respectively, from the upstream side (the side closer to the crusher 200).

[0040] In this embodiment, the first imaging unit 11 images the entire surface of the object to be monitored T as it is being transported on the first conveyor 71. The second imaging unit 12 images the entire surface of the object to be monitored T as it is being transported on the second conveyor 72, and the entire surface of the object to be monitored T as it is being transported on a portion of the third conveyor 73. The third imaging unit 13 mainly images the entire surface of the object to be monitored T as it is being transported on the remaining portion of the third conveyor 73, which is outside the imaging range of the second imaging unit 12. The imaging ranges of the first imaging unit 11, the second imaging unit 12, and the third imaging unit 13 may overlap. Hereinafter, the settings of the imaging unit 10 (first imaging unit 11, second imaging unit 12, third imaging unit 13) that image each of the above regions will be referred to as the "initial settings".

[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 imaging direction (tilt of the entire imaging unit 10), adjustment of the field of view using the wide-angle function (zoom out to capture the monitored object T as a subject smaller within the field of view), and adjustment of the field of view using the telephoto function (zoom in to capture the monitored object T as a subject larger within the field of view). In other words, each imaging unit 10 can image the entire monitored object T on the conveyor 70 using the wide-angle function, and can enlarge and image a part of the monitored object T on the conveyor 70 using the telephoto function.

[0042] (Fire protection device) The fire protection device 40 is located within the transport space R2 and provides fire protection treatment to the monitored object T. While detailed illustrations are omitted, the fire protection device 40, for example, has a predetermined box shape. Multiple fire protection devices 40 are arranged to accommodate the monitored object T transported to each conveyor 70. In other words, the fire protection device 40 includes multiple fire protection devices 40 located in different places. Figure 4 shows an example where three fire protection devices 40 are spaced apart within the transport space R2. For the sake of explanation, these three fire protection devices 40 will be referred to as "first fire protection device 41," "second fire protection device 42," and "third fire protection device 43," respectively, from the upstream side (closer to the crusher 200).

[0043] The first fire protection device 41 is located 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 located 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 located 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 multiple fire protection devices 40 (first fire protection device 41, second fire protection device 42, third fire protection device 43), and each of the multiple fire protection devices 40 is positioned to receive objects T to be monitored that are transported by one or more conveyors 70 included in the multiple conveyors 70.

[0044] In other words, if the first conveyor 71 is operated in the reverse direction, the monitored object T on the first conveyor 71 will fall into the first fire protection device 41. If 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 will fall into the second fire protection device 42. If 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 will fall into the third fire protection device 43.

[0045] The fire protection devices 40 (first fire protection devices 41 to third fire protection devices 43) are activated by the control device 6 when a monitored object T is received inside, thereby creating a sealed space (closed room) inside the fire protection device 40 that is airtightly isolated from the outside. The fire protection devices 40 perform fire protection treatment on the received monitored object T by, for example, closing the interior with a lid from above to create a sealed space. In other words, the fire protection devices 40 perform fire protection treatment on the monitored object T using the suffocation method. Alternatively, the fire protection devices 40 may perform fire protection treatment on the received monitored object T by, for example, spraying an inert gas into the interior. In other words, the fire protection devices 40 may perform fire protection treatment on the monitored object T using the removal method.

[0046] In this embodiment, the fire protection device 40 has a sensor 40a capable of detecting the temperature of the object T that has been received inside. The sensor 40a is, for example, a temperature sensor located 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 that can detect the temperature of the object T, and may be, for example, a smoke sensor or a camera.

[0047] (transfer device) The transfer device 9, activated by the control device 6, transfers the monitored objects T stored in each fire protection device 40 to a pit or the like. The transfer device 9 connects each fire protection device 40 to the pit. The transfer device 9 is an example of a device S that is activated.

[0048] (Control device) The control device 6 remotely controls the target devices S (transport device 7, fire prevention device 40, transport device 9) based on the images received from the imaging unit 10 and the detection results received from the sensor 40a. As shown in Figure 6, the control device 6 includes, 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 operation unit 60, a criteria derivation unit 61 (derivation unit), a selection unit 62, a determination unit 63, a fire prevention processing unit 64, and a storage unit 65.

[0049] (1st acquisition part) The first acquisition unit 55 acquires images transmitted from the imaging unit 10 at predetermined intervals 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 interval is determined, for example, based on 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 prevention 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 potential fire source T1 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 location of the potential fire source T1 by determining whether or not there is a potential fire source T1 among the monitored object T, based on the brightness value of the monitored object T shown in the image. If the first detection unit 56 determines that there is a potential fire source T1 among the monitored object T, it sends the detected location of the potential fire source T1 to the adjustment unit 57, the operation unit 60, and the determination unit 63.

[0051] (adjustment section) When the adjustment unit 57 receives notification from the first detection unit 56 that a candidate fire source T1 has been detected, it adjusts the settings of the imaging unit 10. Specifically, the adjustment unit 57 adjusts the settings of the imaging unit 10 so that it can primarily image the candidate fire source T1 detected by the first detection unit 56. For example, as shown in Figures 4 and 7, let us explain with an example where the candidate fire source T1 is detected on the third conveyor 73 which is 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 candidate fire source T1, and sequentially adjusts the telephoto function of the imaging unit 10 so that most of the field of view (view range) of the imaging unit 10 is the candidate fire source T1. In other words, the adjustment unit 57 causes the imaging unit 10 to track the candidate fire source T1 so that it can continuously image the candidate fire source T1 being transported by the conveyor 70. In other words, when the first detection unit 56 detects a candidate fire source T1, the control device 6 continues sensing the candidate fire source T1 being transported by the conveyor 70. For the sake of explanation, the continuous imaging of the candidate fire source T1 being transported by the conveyor 70 by the imaging unit 10 will be referred to as "tracking imaging." The adjustment unit 57 sends a message to the second detection unit 58 indicating that the imaging unit 10 is performing tracking imaging.

[0052] Furthermore, if 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 settings of the imaging unit 10 so that the imaging unit 10 performs tracking imaging. Also, if the adjustment unit 57 receives notification from the operation unit 60 (described later) that it has switched to normal operation, or if it receives notification from the fire prevention processing unit 64 (described later) that there is no risk of re-ignition, the adjustment unit 57 adjusts the settings of the imaging unit 10 to the initial settings described above.

[0053] (Second detection unit) When the second detection unit 58 receives notification from the adjustment unit 57 that the imaging unit 10 is performing tracking imaging, it determines whether the fire source candidate T1 is a predetermined fire-protected object 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 that has been 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-protected object by determining whether the foreign object determination index based on the brightness value of the fire source candidate T1 in the image exceeds a predetermined foreign object determination threshold. The foreign object determination index is calculated based on, for example, the maximum brightness value of the fire source candidate T1 in the image (i.e., the maximum temperature of the fire source candidate T1), the rate of change of the maximum brightness value of the fire source candidate T1 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 in the image, and the rate of change of the area of ​​the fire source candidate T1 in the image. The second detection unit 58 calculates the foreign object detection index by substituting, for example, 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 (for example, a function). The predetermined calculation formula and foreign object detection threshold are stored in advance by, for example, the storage unit 65. The second detection unit 58 performs the above detection operation by referencing the predetermined calculation formula and foreign object detection threshold from the storage unit 65 in a timely manner. The second detection unit 58 sends a message to the operating unit 60 indicating that the fire source candidate T1 is a fire-prevention target.

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

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

[0056] (Criteria output section) The criteria derivation unit 61 (derivation unit) derives criteria based on the temperature of multiple fire source candidates T1 in a time series received from the second acquisition unit 59 and the temperature change of the monitored object T predicted based on the temperature rise profile (actual data) acquired in advance for each type of monitored object T. Specifically, the criteria derivation unit 61 selects one simulation result from among multiple simulation results (temperature prediction curves showing the temperature change of the monitored object T) based on the temperature rise profile for each type of monitored object T acquired in advance by combustion tests, etc., that best fits the temperature of the multiple fire source candidates T1 in a time series received from the second acquisition unit 59. The criteria derivation unit 61 derives criteria from the selected simulation result. For example, the criteria derivation unit 61 derives the time from the temperature of the fire source candidate T1 shown in the selected simulation result to the temperature at which the monitored object T ignites (the remaining time until the timing of fire occurrence) as the above criteria. Therefore, the criteria indicate the time from the moment when the candidate fire source T1 is detected as a fire-protected object to the moment the fire occurs. Multiple simulation results are stored in advance, for example, in the storage unit 65. The criteria derivation unit 61 performs the above derivation operation by referencing the multiple simulation results from the storage unit 65 in a timely manner. The criteria derivation unit 61 sends the derived criteria to the selection unit 62. The criteria derivation unit 61 may also derive the criteria based on the temperature of one candidate fire source T1 received from the second acquisition unit 59 and the temperature trend of the monitored object T predicted based on the temperature rise profile (actual data) acquired in advance for each type of monitored object T.

[0057] (Selection Department) The selection unit 62 selects a fire protection device 40 to receive the fire source candidate T1 based on the criteria received from the criteria output unit 61. The selection unit 62 obtains the time required to transport the fire source candidate T1 from its location to the fire protection device 40 from predetermined correspondence information. Hereinafter, the time required to transport the fire source candidate T1 from its location to the fire protection device 40 will be referred to as the "transportation time". The correspondence information is, for example, a table in which the location on the conveyor 70 and the time required to transport the monitored object T from its location on the conveyor 70 to a fire protection device 40 capable of transporting the monitored object T (transportation time) are related to each other. 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 will 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 will be transported will be either the second fire protection device 42 or the third fire protection device 43. Also, 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 will be transported will be the third fire protection device 43. Correspondence relationship information is stored in advance, for example, in the storage unit 65. The selection unit 62 performs the above selection operation by referring to the correspondence relationship information from the storage unit 65 in a timely manner. In other words, the selection unit 62 selects which of the multiple fire protection devices 40 to use for fire protection treatment based on the state of the fire-protected object 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 meets predetermined conditions. Here, "meeting predetermined conditions" means, for example, that the transport time is less than the criteria. For example, if a potential fire source T1 is located on the third conveyor 73, the selection unit 62 selects a fire protection device 40 from the second fire protection device 42 and the third fire protection device 43 whose transport time is less than the criteria. Figure 9 shows an example of the relationship between the position of the potential fire source T1 on the conveyor 70 and the fire protection device 40 to which the potential fire source T1 will be transported. The selection unit 62 sends the selected fire protection device 40 to the operation unit 60 and the fire protection processing unit 64.

[0059] (Operating part) The operating unit 60 operates the conveying device 7 so that the fire source candidate T1 moves 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 operating unit 60 operates the first conveyor 71 in the reverse direction. Also, 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 operating unit 60 operates the second conveyor 72 in the forward direction. Furthermore, the operating unit 60 operates the third conveyor 73 in the reverse direction if the position of the fire source candidate T1 received from the first detection unit 56 is on the third conveyor 73 and the fire protection device 40 received from the selection unit 62 is the second fire protection device 42. If the position of the fire source candidate T1 is on the third conveyor 73 and the received fire protection device 40 is the third fire protection device 43, the operating unit 60 operates the third conveyor 73 in the forward direction and the fourth conveyor 74 in the reverse direction.

[0060] Furthermore, if 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 operating unit 60 switches each conveyor 70 to the normal operation state. The operating unit 60 sends a message to the adjustment unit 57 indicating that it has switched to the normal operation state.

[0061] (Judgment Department) 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 determining 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 the monitored object T within the fire protection device 40 re-igniting, based on the detection result of the sensor 40a received from the first acquisition unit 55. Here, "re-igniting" means that a fire will occur in the monitored object T in the future. Specifically, the determination unit 63 determines whether the detection result of the sensor 40a is above a predetermined third threshold. If the detection result of the sensor 40a is above the third threshold, the determination unit 63 determines that there is a risk of re-igniting. On the other hand, if the detection result of the sensor 40a is below the third threshold, the determination unit 63 determines that there is no risk of re-igniting. Hereinafter, the result of this determination will be referred to as the "second determination". The third threshold is stored in advance, for example, by the storage unit 65. The determination unit 63 performs the operation of the second determination by referencing the third threshold from the storage unit 65 in a timely manner. The determination unit 63 sends the result of the second determination to the fire protection processing unit 64.

[0063] (Fire Prevention Department) The fire prevention processing unit 64 activates the fire prevention device 40 received from the selection unit 62 when the result of the first determination received from the determination unit 63 indicates that the candidate fire source T1 is not present in the image. In other words, the fire prevention processing unit 64 activates the fire prevention device 40 received from the selection unit 62, thereby applying fire protection to the monitored object T received by the fire prevention device 40.

[0064] Furthermore, the fire prevention processing unit 64 continues to operate the fire prevention device 40 if the result of the second determination received from the determination unit 63 indicates that there is a risk of re-ignition. Also, the fire prevention processing unit 64 activates the transfer device 9 if the result of the second determination received from the determination unit 63 indicates that there is no risk of re-ignition. In other words, the fire prevention processing unit 64 transfers the monitored object T stored in the fire prevention device 40 to a pit or the like by activating the transfer device 9. The fire prevention processing unit 64 also sends a message to the adjustment unit 57 indicating that there is no risk of re-ignition.

[0065] (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 Figure 10. However, the order of the processes described below is not limited to the following example and may be rearranged 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 predetermined intervals (step S2). Next, the first detection unit 56 detects the fire source candidate T1 by determining whether or not there is a fire source candidate T1 among the monitored object T in the image (step S3). If there is no fire source candidate T1 among the monitored object T (step S3: NO), the process returns to step S2. On the other hand, if there is a fire source candidate T1 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 predetermined intervals (step S5). Next, the second detection unit 58 detects the fire source candidate T1 by determining whether or not it is a fire protection target based on the image (step S6). If the fire source candidate T1 is not subject to fire protection (step S6: NO), the process returns to step S4. On the other hand, if the fire source candidate T1 is subject to fire protection (step S6: YES), the criteria derivation unit 61 derives criteria based on the temperatures of multiple fire source candidates T1 in time series and the predicted temperature changes 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 images the transported fire source candidate T1 (step S10). Next, the first acquisition unit 55 acquires the images transmitted from the imaging unit 10 at predetermined intervals (step S11). Next, the determination unit 63 determines whether or not the fire source candidate T1 is in the image (step S12). If the fire source candidate T1 is in the image (step S12: YES), the process returns to step S10. On the other hand, if the fire source candidate T1 is not in the image (step S12: NO), the fire prevention processing unit 64 activates the fire prevention device 40 to fire-prevent the monitored object T received by the fire prevention device 40 (step S13), and the operation unit 60 switches each conveyor 70 to the normal operation state (step S15). After completing the process in step S15, the process returns to step S1.Following the process in 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 performed while the waste treatment plant is in operation.

[0067] (Effects / Actions) In the fire prevention system 100 described above, a potential fire source T1 with signs of impending fire is detected within the monitored object T, and based on the information acquired regarding the potential fire source T1 using the telephoto function of the imaging unit 10, it is detected whether or not the potential fire source T1 is a designated fire-protection target. This makes it possible to detect areas likely to cause fire with high accuracy before a fire occurs. Furthermore, in the fire prevention system 100, when a potential fire source T1 on the transport device 7 that transports the monitored object T is detected to be a fire-protection target, the transport device 7 is activated to move the potential fire source T1 toward the fire protection device 40. In other words, the potential fire source T1 is treated for fire protection using the function of the transport device 7. Therefore, there is no need to use, for example, a device to move the potential fire source T1. In addition, in the fire prevention system 100, the transport device 7 has multiple conveyors 70, and multiple fire protection devices 40 are arranged so as to be able to receive the potential fire source T1 transported on each conveyor 70. Therefore, the potential fire source T1 can be moved to the fire protection device 40 more quickly. Furthermore, based on criteria indicating the time from the moment a potential fire source T1 on the conveyor 70 is detected as a fire-protected object to the moment the fire actually occurs, a fire protection device 40 that will receive the potential fire source T1 is selected, and the potential fire source T1 is transported to the selected fire protection device 40. Therefore, it is possible to suppress the occurrence of a fire from the potential fire source T1 while it is being transported to the fire protection device 40. In addition, the criteria are derived based on the temperature of multiple potential fire source T1s over time and the temperature changes of the monitored objects T predicted based on temperature rise profiles acquired in advance for each type of monitored object T. Therefore, the criteria can be brought closer to the time it takes from the moment a potential fire source T1 is detected to the actual occurrence of a fire. In other words, the criteria can be made more appropriate. In addition, the fire protection device 40 uses a suffocation method to protect the potential fire source T1 from fire. As a result, compared to a water-spraying method (cooling method) that uses water, for example, moisture does not adhere to the monitored object T. Therefore, events caused by moisture, such as electrical leakage from the monitored object T, are less likely to occur.

[0068] <Third embodiment of the fire prevention system> Next, a third embodiment of the fire protection system 100 according to this disclosure will be described. Note that the criteria outlet 61 of the third embodiment described below differs in part from the criteria outlet 61 described in the second embodiment above. The description of the common components will be omitted.

[0069] (1st acquisition part) In this 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 output unit 61. The first acquisition unit 55 is an example of the acquisition unit 50.

[0070] (Criteria output section) In this embodiment, the criteria derivation unit 61 derives criteria using a trained model 650 (see Figure 6) that has been trained to output criteria when it receives a plurality of time-series images (i.e., information acquired regarding the candidate fire source T1) from the first acquisition unit 55. The trained model 650 is pre-stored in, for example, the memory unit 65. The criteria derivation unit 61 obtains the output criteria by inputting the plurality of time-series images received from the first acquisition unit 55 to the trained model 650 stored in the memory 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 corresponding to the above input by repeatedly performing a learning step in which a training dataset including the temperature transition of the monitored object T predicted in advance for each type of monitored object T and the temperature rise profile acquired in advance for each type of monitored object T is input. The predicted temperature progression of the monitored object T is a simulation result (a temperature prediction curve showing the temperature progression of the monitored object T) based on temperature rise profiles (actual data) for each type of monitored object T obtained in advance through combustion tests or the like. The trained model 650 may use, for example, 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 also derive the criteria using a trained model 650 that has been trained to output criteria when a single image received from the first acquisition unit 55 is input.

[0071] (Effects / Actions) This allows the criteria to more closely reflect the actual time it takes from the detection of potential fire source T1 to the start of the fire.

[0072] <Fourth embodiment of the fire prevention system> Next, a fourth embodiment of the fire prevention system 100 related to this disclosure will be described.

[0073] First, Figure 11 shows the state of the object to be monitored T on the conveyor 70 as it is being transported by the conveyor 70 described above. As shown in Figure 11, the conveyor 70 has, for example, a first portion 70a extending in the direction of transporting the object to be monitored T, and a plurality of second portions 70b provided on the first portion 70a, each holding the object to be monitored T together with the first portion 70a. The first portion 70a is provided with, for example, a conveyor belt, and the conveyor belt is configured to circulate in the forward or reverse direction. Therefore, the imaging unit 10 images the surface of the object to be monitored T that is held and transported by the first portion 70a and the second portions 70b. Figure 12 is a schematic diagram showing the object to be monitored T being transported by the conveyor 70 shown in Figure 11, broken down into a plurality of circles (〇), and shows a state in which an ignition source is included in the object to be monitored T. The ignition sources include, for example, lithium-ion batteries (LIBs) that have been short-circuited due to structural damage caused by impact within the crusher 200, or metal fragments heated by friction within the crusher 200. In Figure 12, "surrounding debris" refers to the monitored objects T located around the ignition source on the conveyor 70 (surrounding the ignition source).

[0074] Figure 13 is a diagram illustrating the changes in the state of the monitored object T (potential fire source T1) being transported by the conveyor 70 over time, according to the location of the ignition source within the monitored object T. Note that the conveyor 70 is not shown in Figure 13. dindicates the time when the fire source candidate T1 is detected in the monitoring target T by the above-described first detection unit 51. As shown in FIG. 13, when there is an ignition source in the monitoring target T, it is understood that as time passes, the temperature on the surface or inside of the fire source candidate T1 is rising as a whole. In addition, the "gas generation amount" shown in FIG. 13 means the generation amount of a specific gas generated from the monitoring target T (fire source candidate T1). Each of Vu1 to Vu4, Vm1 to Vm5, and Vd1 to Vd7 indicates the gas generation amount, and the magnitude relationship among these Vu1 to Vu4, Vm1 to Vm5, and Vd1 to Vd7 is Vu1 < Vu2 < Vu3 < Vu4, Vm1 < Vm2 < Vm3 < Vm4, and Vd1 < Vd2 < Vd3 < Vd4. Also, Vu1 < Vm2 < Vd4. Therefore, the lower the position of the ignition source in the monitoring target T (fire source candidate T1), the larger the gas generation amount. In addition, the "gas concentration" means the concentration of the above-described specific gas generated from the monitoring target T (or fire source candidate T1). Each of Cu1 to Cu4, Cm1 to Cm5, and Cd1 to Cd7 indicates the gas concentration value, and the magnitude relationship among these Cu1 to Cu4, Cm1 to Cm5, and Cd1 to Cd7 is Cu1 < Cu2 < Cu3 < Cu4, Cm1 < Cm2 < Cm3 < Cm4, and Cd1 < Cd2 < Cd3 < Cd4. Also, Cu1 < Cm2 < Cd4. Therefore, the lower the position of the ignition source in the monitoring target T (fire source candidate T1), the higher the concentration of the gas generated from the monitoring target T. That is, due to different ignition source situations, the gas generation amount, gas concentration, etc. are different, and the surface state of the fire source candidate T1 is also different.

[0075] Figure 14 shows the correspondence between the time axis and the surface temperature of the monitored object T, and the correspondence between the time axis and the heat generation rate of the monitored object T, for each type of monitored object T including the ignition source. The correspondences shown in Figure 14 are the temperature rise profiles (actual data) for each type of monitored object T that were previously obtained, for example, through combustion tests. The curves (i), (ii), and (iii) shown in (a) of Figure 14 show the change in surface temperature (state change information) over time for monitored objects T of different types. 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. Also, the curves (i), (ii), and (iii) shown in (b) of Figure 14 show the change in heat generation rate (state change information) over time for monitored objects T of different types. Note that the curves (i), (ii), and (iii) shown in Figure 14 are correspondences obtained from monitored objects T of the same type. d1 This indicates the time when the first detection unit 51 described above detected the fire source candidate T1 among the monitored objects T corresponding to curve (i). d2 This indicates the time when the first detection unit 51 described above detected the fire source candidate T1 among the monitored objects T corresponding to curve (ii). d3 This indicates the time when the first detection unit 51 described above detected the fire source candidate T1 among the monitored objects T corresponding to curve (iii). T shown in Figure 14 d This indicates the temperature of the fire source candidate T1 detected by the first detection unit 51, and T i This indicates the temperature of the ignition source candidate T1 when it ignites. Therefore, the criteria derivation unit 61 described in the second and third embodiments derives the 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] (Control device) As shown in Figure 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 section) The data storage unit 91 acquires information from multiple points in time regarding the fire source candidate T1. Specifically, the data storage unit 91 acquires multiple images of the monitored object T in time from the imaging unit 1 and stores the acquired images in, for example, the storage unit 65. The data storage unit 91 also sends the acquired images in time to the extraction unit 92. The data storage unit 91 is an example of an acquisition unit.

[0078] (Extraction part) The extraction unit 92 extracts feature quantities based on multiple time-series images received from the data storage unit 91. Specifically, the extraction unit 92 extracts the speed of the spread of the surface temperature distribution of the monitored object T and the rate of change of the maximum surface temperature of the monitored object T from the multiple time-series images as the above feature quantities. The extraction unit 92 sends the extracted feature quantities to the estimation unit 93 and stores the feature quantities in the storage unit 65.

[0079] (Estimation Department) The estimation unit 93 estimates the temperature distribution of the candidate fire source 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 candidate fire source T1 and the temperature distribution of the candidate fire source T1 based on CFD data (Computational Fluid Dynamics), which is the result of fluid analysis of the monitored object T that has been acquired in advance, and multiple time-series images acquired in the past that are stored in the storage unit 65. The "information about the ignition source of the candidate fire source T1" here means, for example, the location of the ignition source within the candidate fire source T1 and the amount of heat generated by the ignition source. The above CFD data is stored in advance in the storage unit 65, for example. The estimation unit 93 sends the estimated information about the ignition source of the candidate fire source T1 and the temperature distribution of the candidate fire source T1 to the prediction unit 94.

[0080] (Prediction section) The prediction unit 94 predicts the scale of a fire and the state of candidate fire source T1 at a time (time) after the above criteria have elapsed, starting from the time when candidate fire source T1 is detected as a fire-protected target by the second detection unit 58. This prediction unit 94 then sends the predicted scale of the fire and the state of candidate fire source T1 to the determination unit.

[0081] (Decision section) The decision unit 95 determines the content of the fire prevention measures (fire extinguishing method) for the candidate fire source T1 based on the scale of the fire outbreak and the state of the candidate fire source T1 received from the prediction unit 94. The decision unit 95 determines one fire extinguishing method from among several fire extinguishing methods, such as removal extinguishing, suffocation extinguishing, and water spraying extinguishing (cooling extinguishing). The decision unit 95 sends the determined fire extinguishing method to the operation unit 60. The decision unit is an example of an information processing unit.

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

[0083] (Data volume) The data processing unit 96 calculates the accuracy rate of predicting the surface state of the fire source candidate T1 based on multiple time-series images stored in the storage unit 65 by the data storage unit 91. The accuracy rate is, for example, a result that shows the degree of agreement between the image of the fire source candidate T1 actually acquired at a time after the above criteria have elapsed from the time when the fire source candidate T1 is detected as a fire-protection target by the second detection unit 58, and the predicted state of the fire source candidate T1, expressed as a percentage or similar. The data processing unit 96 stores the calculated accuracy rate in the storage unit 65.

[0084] Furthermore, the operation of each processing unit described above (data storage unit 91, extraction unit 92, estimation unit 93, prediction unit 94, decision unit 95, data processing unit 96) may be realized by artificial intelligence (AI), for example. In this case, an AI (trained model) with 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 can be employed.

[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 Figure 16. The data storage unit 91 acquires multiple time-series images (step S20). Next, the extraction unit 92 extracts feature quantities based on the multiple time-series images (step S21). Next, the estimation unit 93 estimates the temperature distribution of the fire source candidate T1 from the feature quantities (step S22). Next, the prediction unit 94 predicts the scale of the fire and the state of the fire source candidate T1 at a time after the above criteria have elapsed from the timing when the second detection unit 58 detected that the fire source candidate T1 is a fire-protection target, based on information regarding the ignition source of the fire source candidate T1, the temperature distribution of the fire source candidate T1, the accuracy rate, and CFD data (step S23). Next, the determination unit 95 determines the 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 (step S24). Next, the operation unit 60 operates the target device S based on the fire extinguishing method (step S25). The operation of the control device 6 described above is performed repeatedly while the waste treatment plant is in operation.

[0086] (Effects / Actions) According to the above, it is possible to perform appropriate fire extinguishing actions according to the state of the potential fire source T1.

[0087] (Other embodiments) Although embodiments of this disclosure have been described in detail above with reference to the drawings, the specific configurations are not limited to those of each embodiment, and additions, omissions, substitutions, and other modifications to the configurations are possible without departing from the gist of this disclosure.

[0088] In addition, 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 Figure 17, multiple detection units 30 are provided on the wall surface (e.g., the floor surface) on which the object to be monitored T rests, among the wall surfaces defining the storage space R1. The detection unit 30 is a composite sensor capable of simultaneously detecting flames and temperature at a candidate fire source T1, and transmits the detection results of the flames and temperature at the candidate fire source T1 to the control device 5. In this case, the first detection unit 51 of the control device 5 only needs to detect the candidate fire source T1 that shows signs of fire occurring within the object to be monitored T based on the detection results of the detection unit 30. Furthermore, the detection unit 30 is not limited to the imaging units 1 and 10 or the composite sensor described above, but may be, for example, a temperature sensor capable of detecting the temperature of the object to be monitored T, a photoelectric sensor capable of detecting light emitted from the object to be monitored T, a gas sensor capable of detecting the concentration of a specific gas generated from the object to be monitored T, i.e., the concentration of a specific gas present in the space surrounding the object to be monitored T, a sensor capable of detecting microwaves, X-rays, and terahertz waves reflected from the object to be monitored 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 object to be monitored T or the space surrounding the object to be monitored T. In addition, the detector 3 may be replaced with, for example, a carbon monoxide sensor (CO sensor), a thermocouple, or a composite sensor capable of detecting flames and temperature.

[0089] Furthermore, the fire protection device 4 described in the first embodiment may, instead of having a configuration that ejects inert gas, have, for example, a box-shaped partition wall, and by covering the potential fire source T1 with the partition wall from the outside, the potential fire source T1 as the target of fire protection may be treated for fire protection (suffocation fire extinguishing method). Alternatively, the fire protection device 4 may be configured to take out only the potential fire source T1 from the monitored object T and transport the taken-out potential fire source T1 from the storage space R1. Covering the potential fire source T1 with a partition wall from the outside and transporting the potential fire source T1 are examples of fire protection treatment.

[0090] Furthermore, the first detection unit 51 described in the first embodiment may detect a potential fire source T1 within the monitored object T shown in the image by detecting the generation of smoke visible in the image. In this case, the potential fire source T1 is, for example, a location within the monitored object T shown in the image where smoke has begun to be generated.

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

[0092] Furthermore, the fire protection devices 4 and 40 described in the first and second embodiments may include a first fire protection device that uses a removal method or a suffocation method, and a second fire protection device that uses a water spraying method (cooling method). In this case, the control devices 5 and 6 (for example, the selection unit 62 in the second embodiment) may select which of the multiple fire protection devices 40 to use for fire protection measures based on the state of the fire-protected object obtained from the detection result of the second detection unit 58. In other words, the control devices 5 and 6 only need to select a fire protection device 40 that can execute an appropriate fire extinguishing method from among multiple fire protection devices 40 with different fire extinguishing methods.

[0093] Furthermore, the second information (images used for detection by the second detection units 52 and 58) described in the first and second embodiments may be obtained by magnifying the sensing results from the imaging units 1 and 10. Specifically, the control devices 5 and 6 may obtain second information that is more detailed than the first information by magnifying the images captured by the imaging units 1 and 10. The control devices 5 and 6 may implement the above-mentioned magnification process by, for example, interpolating between data using an interpolation function when the spatial and temporal resolution in the storage space R1 or transport space R2 is poor. That is, when the first detection units 51 and 56 detect a candidate fire source T1, the control devices 5 and 6 may implement the above-mentioned magnification process by applying software-based image processing (correction) to narrow the field of view (view of view) of the image showing the candidate fire source T1 to increase the resolution.

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

[0095] The control devices 5 and 6 described above are implemented in one or more computers 1100. The operation of each processing unit described above is stored in storage 1130 in the form of a program. The processor 1110 reads the program from storage 1130, loads it into main memory 1120, and executes the above processing according to the program. The processor 1110 also reserves memory areas in main memory 1120 corresponding to the storage units 54 and 65 described above, according to the program. The program may be for realizing a part of the functions to be performed by the computer 1100. For example, the program may perform its function in combination with other programs already stored in storage 1130, or in combination with other programs implemented in other devices. In addition to the above configuration, or in place of the above configuration, the computer 1100 may be equipped with a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device). Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). 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 magnetic disks, magneto-optical disks, and 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 load it into main memory 1120 and execute the above processing. In the above embodiment, storage 1130 is a tangible storage medium that is not temporary. Furthermore, the program may be for the purpose of realizing some of the functions described above. Moreover, the program may be a so-called differential file (differential program) that realizes the above functions in combination with other programs already stored in storage 1130.

[0097] <Note> 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 embodiment includes first detection units 51, 56 that detect a candidate fire source T1 in the monitored object T that shows signs of fire occurring, based on first information obtained by sensing the monitored object T or the space surrounding the monitored object T, and second detection units 52, 58 that detect whether the candidate fire source T1 is a predetermined fire prevention target, based on second information obtained in more detail than the first information regarding the candidate fire source T1 detected by the first detection units 51, 56.

[0099] This makes it possible to detect areas where a fire is likely to occur with high accuracy before the fire actually starts.

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

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

[0102] This helps to prevent fires from starting at the monitored object T.

[0103] (4) The fire protection system 100 according to the fourth embodiment is any one of the fire protection systems 100 from (1) to (3), further comprising imaging units 1, 10 that perform sensing by imaging the object to be monitored T or the space surrounding the object to be monitored T, and the second information may be obtained by augmenting the results of the sensing by the imaging units 1, 10.

[0104] (5) The fire protection system 100 according to the fifth embodiment is the fire protection system 100 of (3), wherein the fire protection device 40 includes a plurality of fire protection devices 40 installed in different locations, and the control device 6 may select which of the plurality of fire protection devices 40 to use for the fire protection treatment based on the state of the fire-protected object obtained from the detection results of the second detection units 52, 58.

[0105] (6) The fire prevention system 100 according to the sixth embodiment is the fire prevention system 100 of (3), wherein the fire prevention device 40 includes 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 for the fire prevention treatment based on the state of the fire-protected object obtained from the detection results of the second detection units 52, 58.

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

[0107] (8) The fire prevention system 100 according to the eighth embodiment is any one of (1) to (7) and further comprises a transport device 7 for transporting the object to be monitored T, a fire prevention device 40 for receiving the object to be monitored T transported by the transport device 7 and for fire prevention treatment of the received object to be monitored T, and a control device 6 that controls the transport device 7 so that the fire source candidate T1 on the transport device 7 moves toward the fire prevention device 40 when the second detection unit 58 detects that the fire source candidate T1 on the transport device 7 is the object to be protected from fire.

[0108] As a result, the fire source candidate T1 is treated for fire prevention using the function of the transport device 7 that transports the object to be monitored 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 embodiment is the fire prevention system 100 of (8), wherein the control device 6 may continue sensing 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 protection system 100 according to the tenth embodiment is the fire protection system 100 of (8), wherein the transport device 7 has a plurality of conveyors 70, each of which transports the object to be monitored T, and the fire protection device 40 has a plurality of fire protection devices 40, and each of the plurality of fire protection devices 40 may be arranged to be able to receive the object to be monitored T transported by one or more conveyors 70 included in the plurality of conveyors 70.

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

[0112] (11) The fire protection system 100 according to the 11th embodiment is the fire protection system 100 of (10), wherein the control device 6 may, when the second detection unit 58 detects that the candidate fire source T1 on the transport device 7 is the fire protection target, select a fire protection device 40 from among the plurality of fire protection devices 40 to accept the fire protection target based on criteria indicating the time from the detection timing to the timing of the fire occurrence.

[0113] This makes it possible to prevent a fire from starting in the potential fire source T1 while it is being transported to the fire prevention device 40.

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

[0115] This allows the criteria to be brought closer to the time it takes from the detection of potential fire source T1 to the actual outbreak of fire.

[0116] (13) The fire prevention system 100 according to the 13th embodiment is the fire prevention system 100 of (12), wherein the control device 6 derives the criteria using a trained model 650 that has been trained to output the criteria when the second information acquired with respect to the candidate fire source T1 is input, and the trained model 650 may be trained to output the criteria corresponding to the input by repeatedly performing a learning step in which a training dataset is input that includes at least one of the temperature transition of the monitored object T predicted in advance for each type of monitored object T and the temperature rise profile acquired in advance for each type of monitored object T.

[0117] This allows the criteria to be more closely aligned with the time it takes from the detection of potential fire source T1 to the actual outbreak of fire.

[0118] (14) The fire prevention system 100 according to the 14th embodiment is any one of the fire prevention systems 100 from (3) to (13), wherein the control device 6 includes an acquisition unit that acquires the second information at multiple points in time in a time series acquired with respect to the candidate fire source T1, and an information processing unit that derives at least one of the remaining time until the timing of fire occurrence with respect to the candidate fire source and the content of fire prevention treatment for the candidate fire source, based on state change information showing the time change of state until fire occurs, which is determined by experiment or simulation for multiple ignition sources with different conditions, or a trained model that has been trained using the state change information, and the second information at multiple points in time in a time series acquired by the acquisition unit.

[0119] (15) The fire prevention system 100 according to the 15th embodiment includes a detection unit that detects a candidate fire source T1 within the monitored object T that shows signs of fire occurring, 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 timing when the candidate fire source T1 is detected to the timing when the fire occurs, based on information obtained with respect to at least the candidate fire source T1. [Explanation of Symbols]

[0120] 1,10…Imaging unit 2…Moving device 3…Detector 4,40…Fire protection device 5,6…Control device 7…Transport device 8…Cute unit 8a…Surface 8g…Guide 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 protection device 42…Second fire protection device 43…Third fire protection 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 output unit 62…Selection unit 63…Determination unit 64…Fire protection processing unit 70…Conveyor 70a…First part 70b...Second section 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...Decision unit 96...Data processing unit 100...Fire prevention system 200...Crusher 300...Wall surface 531...First operating unit 532...Second operating unit 650...Trained model 651...First determination unit 652...Second determination unit 653...Third determination unit 654...Fourth determination unit 1100...Computer 1110...Processor 1120...Main memory 1130...Storage 1140...Interface Dv...Vertical direction R1...Storage space R2...Conveying space S...Operating target device T...Object under monitoring T1...Potential source of fire T2...Location of fire source W1, W2...Width

Claims

1. A first detection unit detects potential fire sources within the monitored object that show signs of fire based on first information obtained by sensing the monitored object or the space surrounding the monitored object, A second detection unit detects whether the fire source candidate detected by the first detection unit is a predetermined fire-protected object, based on the rate of change of luminance values ​​included in the second information, which is obtained in more detail than the first information, with respect to the fire source candidate detected by the first detection unit, A fire protection system is provided.

2. An imaging unit that performs sensing by imaging the object to be monitored or the space surrounding the object to be monitored, A moving device that reduces the distance between the detector and the candidate fire source, The further comprising at least one of the following: The second information is acquired using the moving device or the telephoto function of the imaging unit. The fire prevention system according to claim 1.

3. A fire protection device for fire protection treatment of the aforementioned fire protection target, A control device that, when the second detection unit detects that the candidate fire source is the target of the fire prevention, causes the fire prevention device to perform the fire prevention treatment, It also has the following features: The fire prevention system according to claim 1.

4. The system further comprises an imaging unit that performs sensing by imaging the object to be monitored or the space surrounding the object to be monitored, The second information is obtained by processing the sensing results by the imaging unit to enlarge them. The fire prevention system according to claim 3.

5. The aforementioned fire protection device includes multiple fire protection devices installed in different locations. The control device selects which of the multiple fire protection devices to use for the fire protection treatment based on the state of the fire-protected object obtained from the detection result of the second detection unit. The fire prevention system according to claim 3.

6. The aforementioned fire protection device includes multiple fire protection devices with different fire extinguishing methods, The control device selects which of the multiple fire protection devices to use for the fire protection treatment based on the state of the fire-protected object obtained from the detection result of the second detection unit. The fire prevention system according to claim 3.

7. The aforementioned multiple fire prevention devices include a first fire prevention device that uses a removal fire extinguishing method or a suffocation fire extinguishing method, and a second fire prevention device that uses a water spraying fire extinguishing method. The fire prevention system according to claim 6.

8. A transport device for transporting the object to be monitored, A fire protection device that receives the object to be monitored transported by the transport device and fire-prevents the received object to be monitored, When the second detection unit detects that the candidate fire source on the transport device is the target of the fire prevention, a control device controls the transport device so that the candidate fire source moves toward the fire prevention device. It also has the following features: A fire prevention system according to any one of claims 1 to 7.

9. When the first detection unit detects the fire source candidate, the control device continues sensing the fire source candidate being transported by the transport device. The fire prevention system according to claim 8.

10. The transport device has a plurality of conveyors, each of which transports the object to be monitored. The fire protection device comprises a plurality of fire protection devices, each of which is arranged to be able to receive the object to be monitored, which is transported by one or more conveyors included in the plurality of conveyors. The fire prevention system according to claim 8.

11. When the control device detects that the candidate fire source on the transport device is the fire-protected object, the control device selects a fire-protected device from among the plurality of fire-protected devices to accept the fire-protected object, based on criteria indicating the time from the detection timing to the timing of the fire outbreak. The fire prevention system according to claim 10.

12. The control device derives the criteria based on the second information obtained with respect to the candidate fire source and the temperature trend of the monitored object predicted based on the temperature rise profile obtained in advance for each type of monitored object. The fire prevention system according to claim 11.

13. When the control device receives the second information obtained regarding the fire source candidate, it derives the criteria using a trained model that has been trained to output the criteria, The aforementioned trained model is The temperature trend of the object to be monitored, which has been predicted in advance for each type of object to be monitored, A temperature rise profile acquired in advance for each type of object being monitored, A training step is repeatedly performed in which a training dataset containing at least one of the following is input, so that the system is trained to output the criteria corresponding to the input. The fire prevention system according to claim 12.

14. The control device is An acquisition unit that acquires the second information at multiple points in time with respect to the aforementioned fire source candidate, An information processing unit derives at least one of the remaining time until the timing of fire occurrence for the candidate fire source and the content of fire prevention measures for the candidate fire source, based on state change information showing the time change of the state until fire occurrence, obtained by experiment or simulation for multiple ignition sources with different conditions, or a trained model trained using the state change information, and the second information at multiple time points in a time series obtained by the acquisition unit. Having, A fire prevention system according to any one of claims 3 to 7.

15. A detection unit that detects potential fire sources within the monitored object that show signs of fire based on information obtained by sensing the monitored object or the space surrounding the monitored object, A derivation unit that derives the remaining time from the detection of the fire source candidate to the timing of fire outbreak based on the rate of change of brightness values ​​included in the information obtained with respect to at least the fire source candidate, A fire protection system is provided.

Images