An automatic patrol fire prevention and extinguishing device and method based on infrared thermal imaging

Abstract

The present application relates to a kind of automatic inspection fire prevention and extinguishing device and method based on infrared thermal imaging, to solve the technical problems such as large artificial inspection blind area, early warning lag, unable to deal with initial fire on the spot.The core of the technical scheme of the present application is: a mobile platform is formed by fixed track, track belt, control valve and sliding base;the control valve drives the track belt to drive the sliding base to reciprocate, while the rotating shaft and the track belt are synchronously rotated to automatically retract and release communication cable;infrared thermal imager generates thermal map in real time and sets double threshold values of early warning and alarm;when early warning, the control box locks the area to spray water for cooling after artificial confirmation by host computer, and when alarm, local high-voltage switch is automatically opened for fire extinguishing.The present application is mainly used for automatic inspection, early warning and precise fire prevention and extinguishing in coal mine underground belt roadway, substation and other external fire prone areas.

Description

Technical Field

[0001] This invention relates to the technical field of coal mine safety monitoring and automatic fire extinguishing, and in particular to an automatic inspection and fire prevention and extinguishing device and method based on infrared thermal imaging. Background Technology

[0002] Mine fires are one of the most prominent major disasters in coal mine safety production. External fires, in particular, have become frequent safety hazards underground due to their numerous triggers, sudden onset, and rapid spread. External fires are mainly caused by external heat sources such as short circuits and overloads in electrical equipment, heat generated by mechanical friction, and the failure of flame retardants in conveyor belts and cables. Compared to internal fires caused by spontaneous combustion of coal seams, external fires have no obvious warning signs and can ignite combustibles in the roadway in a short time, rapidly accumulating high-temperature, dense smoke. They are extremely prone to inducing gas and coal dust explosions, posing a significant hazard.

[0003] The traditional manual inspection and single-sensor monitoring methods commonly used in mines are clearly insufficient in their targeted nature. Manual inspections cannot monitor dynamic risk points such as electromechanical equipment and conveyor belts in real time, resulting in large blind spots. Single-sensor monitoring can only capture data exceeding the standard after open flames have formed, and cannot identify initial hidden dangers such as equipment overheating and friction heating. This leads to problems such as delayed early warning and one-sided judgment, making it difficult to achieve proactive prevention and control of external fires and failing to meet the safety operation requirements of intelligent mines for proactive defense and precise prevention and control. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To address this, the present invention proposes an automatic inspection and fire extinguishing device and method based on infrared thermal imaging. The device integrates inspection and fire extinguishing by using an infrared thermal imager and a water spray ball valve mounted on a track-mounted mobile platform. By setting dual temperature thresholds for early warning and alarm, a graded response is achieved: when an early warning is triggered, water is sprayed to cool the area after manual confirmation; when an alarm is triggered, the device automatically locks the high-temperature area and initiates fire extinguishing.

[0006] An automatic inspection and fire extinguishing device based on infrared thermal imaging according to an embodiment of the present invention is characterized in that it includes a base module and a monitoring module; the base module includes a fixed track, a track belt installed on the fixed track, a control valve connected to the track belt, and a sliding base installed on the fixed track and fixedly connected to the track belt, the sliding base being driven by the track belt to move along the fixed track; the monitoring module includes a base installed on the sliding base, a water spray ball valve installed on the base, an infrared thermal imager installed on the sliding base, a control box connected to the infrared thermal imager and the water spray ball valve respectively, and a host computer communicating with the control box; the control valve has a rotating shaft, a communication cable wound on the rotating shaft, the free end of the communication cable being connected to the infrared thermal imager, the rotating shaft rotating synchronously with the track belt, and the communication cable automatically retracting and extending when the sliding base moves.

[0007] According to one embodiment of the present invention, a control valve is fixed to one end of a fixed track. The control valve drives the track belt to rotate forward or backward, thereby causing the sliding base to move back and forth along the fixed track.

[0008] According to one embodiment of the present invention, a high-pressure switch is provided inside the water spray ball valve, and a multi-functional nozzle connected to the high-pressure switch and a high-pressure water pipe for connecting to a well water source are provided outside the water spray ball valve; the multi-functional nozzle has a spray mode, a sprinkling mode and a jet water mode, and is controlled by a control box to switch between them.

[0009] According to one embodiment of the present invention, both the lens of the infrared thermal imager and the water spray ball valve can reciprocate along a conical space, and the adjustment angle of the water spray ball valve is greater than the adjustment angle of the lens of the infrared thermal imager, so that the water spray range of the water spray ball valve covers the illumination range of the lens of the infrared thermal imager.

[0010] According to one embodiment of the present invention, the control box is connected to the wiring port on the control valve. The control box is equipped with a touch screen for configuring the inspection length and moving speed of the sliding base along the fixed track, the warning temperature threshold and alarm temperature threshold of the infrared thermal imager, the water spraying mode and start / stop cycle of the water spray ball valve, and the driving direction and start / stop of the control valve. The control box also communicates with the host computer through the underground industrial ring network.

[0011] This invention also provides an automatic inspection and fire extinguishing method based on infrared thermal imaging, applied to a device, comprising the following steps: S1, installing the device and connecting it to power and water; S2, controlling the control valve via the control box to move the sliding base to the initial position; S3, setting the inspection length and moving speed of the sliding base along the fixed track, the warning temperature threshold and alarm temperature threshold of the infrared thermal imager, and the driving parameters of the control valve via the control box or host computer; S4, starting the device via the control box or host computer to enter the daily inspection mode, the sliding base reciprocates along the fixed track, and the infrared thermal imager monitors the area temperature in real time; when the monitored temperature exceeds the warning temperature threshold, the infrared thermal imager uploads the warning information to the host computer via the control box, and after manual confirmation, the control box controls the water spray ball valve to lock the warning area for water spraying and cooling; when the monitored temperature exceeds the alarm temperature threshold, the control box automatically controls the water spray ball valve to open the high-pressure switch locally, locks the alarm area for water spraying and cooling, and simultaneously uploads the alarm information to the host computer.

[0012] According to one embodiment of the present invention, in S4, when the infrared thermal imager identifies a warning temperature area, if the user chooses not to spray water to cool it down, and the warning area does not expand by more than 20% and there are no new hot spots in the next inspection, the sliding base will not stop when it inspects the area again, but will only upload the warning information.

[0013] According to one embodiment of the present invention, in S4, in the daily inspection mode, the control box controls the water spray ball valve to open in spray mode or sprinkle mode according to a preset cycle; when a warning or alarm is triggered and water spraying is required to cool down, the multi-functional nozzle switches to water jet mode, and after the temperature of the monitored area returns to normal, the device resumes the daily inspection mode.

[0014] According to one embodiment of the present invention, in S4, after the host computer pauses the daily inspection mode, the operator clicks on any area in the thermal map uploaded by the infrared thermal imager, and the control box controls the water spray ball valve to spray water to cool the area at a fixed point. After cooling, the daily inspection mode is restored.

[0015] According to one embodiment of the present invention, the moving speed V of the sliding base satisfies: 0.1m / s≤V≤0.5m / s.

[0016] The beneficial effects of this invention are as follows: This invention is particularly suitable for fire prevention and extinguishing monitoring and control in areas prone to external fires, such as underground conveyor belt roadways and substations in coal mines. By integrating an infrared thermal imager and a water spray ball valve onto the same movable base, a closed-loop function of simultaneous inspection, monitoring, and fire extinguishing is achieved, solving the problem that existing technologies can only monitor but cannot handle fires on-site. By setting a rotating shaft on the control valve and winding a communication cable around it, the cable automatically retracts and extends as the sliding base moves, ensuring the reliability of wired power supply and signal transmission while avoiding cable dragging and tangling problems. This is suitable for underground environments with strong electromagnetic interference and unstable wireless signals. By setting dual temperature thresholds for early warning and alarm, a graded response is achieved, with early warning... After manual confirmation by the host computer, water spraying for cooling is initiated. Upon alarm, the control box automatically activates fire extinguishing on-site without manual intervention, significantly shortening fire response time. For warning areas that have been confirmed to be untouchable and whose scope has not significantly expanded, the system automatically stops during secondary inspections and only uploads information, avoiding ineffective shutdowns and improving inspection efficiency. During routine inspections, it can operate in spray or sprinkler mode according to preset cycles to reduce dust and lower temperatures. In case of fire, it automatically switches to jet water mode to ensure fire extinguishing effectiveness, and automatically resumes normal operation once the temperature returns to normal. The host computer supports pausing automatic inspections, and by clicking on any area in the thermal map, the system controls the water spray ball valve to spray water for cooling in that area, making the operation intuitive and the response flexible.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an automatic inspection and fire extinguishing device based on infrared thermal imaging. Figure 2 This is the spray mode of the multi-functional nozzle; Figure 3 This is the water spraying mode of the multi-functional nozzle; Figure 4 It is the water jet spray mode of the multi-functional nozzle; Figure 5 This is a flowchart of an automatic inspection and fire prevention method based on infrared thermal imaging.

[0021] The labels in the diagram are as follows: 1. Fixed track; 2. Track belt; 3. Sliding base; 4-1. First groove; 4-2. Second groove; 5. Base; 6. Water spray ball valve; 7. Multifunctional nozzle; 8. High-pressure water pipe; 9. Infrared thermal imager; 10. Control valve; 11. Rotating shaft; 12. Wiring port; 13. Control box; 14. Host computer; 15. Communication cable; 16-1. First cable; 16-2. Second cable; 16-3. Third cable. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The following describes in detail, with reference to the accompanying drawings, an automatic inspection and fire prevention device and method based on infrared thermal imaging, according to an embodiment of the present invention.

[0026] Example 1: like Figure 1 As shown, this embodiment provides an automatic inspection and fire prevention device based on infrared thermal imaging, including a base module and a monitoring module.

[0027] The base module includes a fixed rail 1, a track belt 2, a control valve 10, and a sliding base 3. The fixed rail 1 is made of stainless steel and is fixed to the sidewall of the underground roadway or chamber wall. Two tracks can be spliced ​​together as needed to extend the inspection distance. The track belt 2 is installed on the fixed rail 1 and passes through the control valve 10. Driven by the control valve 10, it can rotate forward or backward on the fixed rail 1. The control valve 10 is fixed to one end of the fixed rail 1 and connected to the track belt 2. The control valve 10 contains a drive motor and a control board. Externally, the control valve 10 has a rotating shaft 11 and a wiring port 12, located at the end of the rotating shaft 11. The wiring port 12 is internally connected to the control board inside the control valve 10. A communication cable 15 is wound around the rotating shaft 11. One end of the communication cable 15 is fixed to the rotating shaft 11 and connected to the inside of the wiring port 12, while the other end is free. The outside of the wiring port 12 is connected to the control box 13 via a first cable 16-1. The rotating shaft 11 can rotate synchronously with the track belt 2 in either the forward or reverse direction. The free end of the communication cable 15 wound on the rotating shaft 11 can be unwound and retracted following the forward or reverse rotation of the rotating shaft 11. The sliding base 3 is installed on the fixed track 1 and fixedly connected to the track belt 2. The upper surface of the sliding base 3 is provided with a first groove 4-1 and a second groove 4-2. The first groove 4-1 is used to fix the base 5, and the second groove 4-2 is used to fix the infrared thermal imager 9. When the control valve 10 drives the track belt 2 to rotate, the sliding base 3 moves back and forth along the fixed track 1 together with the track belt 2. At the same time, the rotating shaft 11 rotates synchronously with the track belt 2, automatically unwinding and retracting the communication cable 15 wound on it, thereby realizing wired power supply and signal transmission for the sliding base 3 during movement and avoiding the problem of cable dragging and tangling.

[0028] Among them, the fixed track 1 can be spliced ​​in pairs, and the interface does not affect the smooth movement of the sliding base 3. The length of the track 2 can be customized according to the length of the fixed track 1 that is finally fixed in the well, and the track 2 can be connected end to end.

[0029] The monitoring module includes a base 5, a water spray ball valve 6, an infrared thermal imager 9, a control box 13, and a host computer 14. The base 5 is made of stainless steel and is fixed to the first groove 4-1 of the sliding base 3. The water spray ball valve 6 is installed above the base 5. The water spray ball valve 6 is a spherical stainless steel casing device, indirectly connected to the control box 13 via the infrared thermal imager 9. That is, the control signal from the control box 13 is forwarded to the water spray ball valve 6 via the adapter of the infrared thermal imager 9. The water spray ball valve 6 can be controlled by the control box 13, reciprocating around a fixed point as the rotation center along a conical space to achieve full-range pitch or sway adjustment of the conical surface. The water spray ball valve 6 has a high-pressure switch inside, which is controlled by the control box 13 to open and close to control the entry of external water. The water spray ball valve 6 has a multi-functional nozzle 7 and a high-pressure water pipe 8 on its exterior. The multi-functional nozzle 7 is used for spraying water and is connected to the front end of the high-pressure switch. The rear end of the high-pressure switch is connected to the high-pressure water pipe 8, which can be connected to a well water source. See [link to relevant documentation]. Figure 2 , Figure 3 and Figure 4 The multi-functional nozzle 7 features spray, sprinkle, and jet water modes, which are controlled and switched by the control box 13. A high-pressure water pipe 8 connects to the well water source. An infrared thermal imager 9 is fixed to the second groove 4-2 of the sliding base 3. One end of the infrared thermal imager 9 is connected to the water spray ball valve 6 via the second cable 16-2, and the other end is connected to the free end of the communication cable 15 wound on the rotating shaft 11, thus communicating with the control box 13 through the wiring port 12 of the control valve 10. The infrared thermal imager 9 can accurately identify the external ambient temperature, converting the temperature difference into a visual thermal map, allowing for a direct view of the hot and cold distribution. The infrared thermal imager 9 has an adapter interface to receive and forward signals from the water spray ball valve 6 and the control box 13. The infrared thermal imager 9 can reciprocate its lens around a fixed point as the rotation center along a conical space, achieving full-area pitch or swivel adjustment of the conical surface, and generating a regional thermal map in real time. The water spray ball valve 6 can also reciprocate along the conical space, and its adjustment angle is greater than that of the infrared thermal imager 9 lens, ensuring that the water spray range of the water spray ball valve 6 can completely cover the irradiation range of the infrared thermal imager 9.

[0030] The control box 13 is connected to the wiring port 12 via the first cable 16-1. The control box 13 has an internal touchscreen for configuring the inspection length and movement speed of the sliding base 3, the warning and alarm temperature thresholds of the infrared thermal imager 9, the water spray mode and start / stop cycle of the water spray ball valve 6, and the drive direction and start / stop of the control valve 10. The control box 13 also communicates with the host computer 14 via the underground industrial ring network. Specifically, the control box 13 is also connected to the host computer 14 via the third cable 16-3, uploading the action information of the water spray ball valve 6, the infrared thermal imager 9, and the control valve 10 to the host computer 14, and simultaneously receiving control commands from the host computer 14. The host computer 14 can view the information uploaded by the control box 13 in real time and can also actively control the control box 13 to control the inspection length and movement speed of the sliding base 3, the warning and alarm temperature thresholds of the infrared thermal imager 9, the water spray mode and start / stop cycle of the water spray ball valve 6, and the drive direction and start / stop of the control valve 10.

[0031] Example 2: like Figure 5 As shown, this embodiment provides an automatic inspection and fire prevention / extinguishing method based on infrared thermal imaging, including the following steps: S1. Installation and preparation: Install the device in the underground fire inspection area (such as belt conveyor roadway, substation), and connect the power supply and underground water source.

[0032] S2. Initialization: Control the control valve 10 via the control box 13 to move the sliding base 3 to the side where the control valve 10 is located (initial position). During the movement, the rotating shaft 11 rotates with the track belt 2, and the free end of the communication cable 15 wound on the rotating shaft 11 performs a winding or unwinding action.

[0033] S3. Parameter Settings: Based on the length of the installed fixed track 1, the inspection length and moving speed V of the sliding base 3 are set via the control box 13 or the host computer 14. The value range of the moving speed V is 0.1m / s ≤ V ≤ 0.5m / s. Simultaneously, based on the installation location of the device and the environmental characteristics of the monitoring area, the customer can set the warning temperature threshold and alarm temperature threshold of the infrared thermal imager 9, as well as the drive parameters of the control valve 10 (such as drive direction and start / stop logic).

[0034] S4. Routine Inspection and Tiered Response: The device is activated via control box 13 or host computer 14 to enter the routine inspection mode. In this mode, the sliding base 3 moves back and forth along the fixed track 1 at a set speed and inspection length, and the lens of the infrared thermal imager 9 deflects back and forth along the conical space to monitor the area temperature in real time.

[0035] When the temperature in the area monitored by the infrared thermal imager 9 exceeds the warning temperature threshold: the infrared thermal imager 9 uploads the warning information to the host computer 14 via the control box 13. The host computer 14 displays the warning information and a "Start water spray cooling?" indicator. Ground personnel confirm whether to initiate water spray cooling. If ground personnel confirm, the control box 13 controls the water spray ball valve 6 to rotate, automatically locking the warning temperature area identified by the infrared thermal imager 9, turning on the high-pressure switch, and allowing the multi-functional nozzle 7 to spray water for cooling. If multiple areas in the infrared thermal imager 9 display warning temperatures, the control box 13 controls the water spray ball valve 6 to spray water on each area sequentially for cooling.

[0036] When the temperature of the area monitored by the infrared thermal imager 9 exceeds the alarm temperature threshold: the infrared thermal imager 9 uploads the alarm information to the host computer 14 through the control box 13. At the same time, the control box 13 automatically controls the water spray ball valve 6 to rotate, locks the alarm area, and turns on the high-pressure switch to spray water for cooling without manual confirmation.

[0037] Example 3: Based on Example 2, this embodiment further describes the parameter configuration method for the daily inspection mode and the intelligent response logic of the device during the inspection process, including functions such as periodic water spraying, early warning / alarm linkage, intelligent ignoring of steady-state hotspots, and manual fixed-point intervention.

[0038] After completing steps S1 to S4 of Example 2, the relevant parameters for the daily inspection mode are set via control box 13 or host computer 14. The on / off times of the high-pressure switch and the operating mode of the multi-functional sprinkler head 7 are configured. The on / off time configuration sequence is cycle, time. For example, the cycle can be selected as every day, workday, or manually selected from the calendar as the current day, a future day, or multiple days; the time can be selected as a continuous period within 24 hours, multiple periods, or continuous operation. For example, it can be configured to operate continuously from 9:00 AM to 5:00 PM every workday, or operate for two periods daily: 00:00 to 01:00 and 12:00 to 13:00. The multi-functional sprinkler head 7 has a spray mode, a sprinkling mode, and a jet spray mode. Users can select one mode according to their daily needs. After selection, during the daily inspection period, when the high-pressure switch is turned on according to the configured on / off time, the multi-functional sprinkler head 7 will spray water according to the selected mode, providing preventative functions such as dust reduction, cooling, and humidification. It should be noted that regardless of the selected water spray mode in the daily inspection mode, when the warning temperature is triggered and water spraying is initiated upon manual confirmation, or when the alarm temperature is triggered and water spraying is initiated automatically, the multi-functional sprinkler head 7 will automatically switch to the jet water mode to ensure the strongest fire extinguishing effect. After the temperature in the monitored area returns to normal, the multi-functional sprinkler head 7 will automatically revert to the spray or sprinkling mode configured in the daily inspection mode.

[0039] After configuring the above parameters, the device is activated via control box 13 or host computer 14 to enter the daily inspection mode. Control box 13 controls control valve 10 to drive the rail belt 2 to rotate, causing the sliding base 3 to reciprocate along the fixed track 1 at a set moving speed. During the movement, the rotating shaft 11 rotates synchronously with the rail belt 2, automatically retracting and extending the communication cable 15 to ensure stable and reliable power supply and signal transmission for the infrared thermal imager 9. Simultaneously, control box 13 controls the lens of the infrared thermal imager 9 to reciprocate along the conical space with a fixed point as the rotation center, achieving automatic pitch / swing adjustment across the entire conical surface to ensure coverage of the entire inspection area.

[0040] When the infrared thermal imager 9 detects that the temperature in the monitored area exceeds the warning temperature threshold, the control box 13 locally controls the control valve 10 to stop the rotation of the track belt 2, causing the sliding base 3 to stop near the warning area. At the same time, the infrared thermal imager 9 uploads the warning information to the host computer 14 through the control box 13. The host computer 14 pops up a warning prompt and displays a "Start water spray cooling?" indicator.

[0041] If ground personnel confirm the water spraying, control box 13 controls the water spray ball valve 6 to rotate, automatically locking the warning temperature area identified by infrared thermal imager 9, turning on the high-pressure switch, and multi-functional nozzle 7 sprays water in jet mode to cool the area. After the temperature in the monitored area returns to normal, the device automatically resumes the daily inspection mode and continues to perform mobile inspections and temperature monitoring.

[0042] If ground personnel choose not to spray water, the device continues its routine inspection mode, but control box 13 records the location, temperature range, and hotspot distribution of the warning area. When the device inspects this area again, the system automatically determines: if the area of ​​the warning zone has not expanded by more than 20% and there are no new contiguous hotspots (i.e., the temperature anomaly point is not connected to the original temperature anomaly range), then control box 13 will not control control valve 10 to stop the rotation of track belt 2 locally, and sliding base 3 will pass directly through the area. Only the infrared thermal imager 9 will upload the warning information to control box 13 and host computer 14. This logic avoids the device repeatedly stopping at the same persistent non-emergency high-temperature point, significantly improving inspection efficiency. Conversely, if the area expands by more than 20% or new contiguous hotspots appear, the device will still stop and re-report, awaiting manual or automatic processing.

[0043] When the infrared thermal imager 9 detects that the temperature in the monitored area exceeds the alarm temperature threshold, the control box 13 locally controls the control valve 10 to stop the rotation of the rail belt 2 without manual confirmation. The control box 13 directly controls the water spray ball valve 6 to rotate, locks the alarm area, turns on the high-pressure switch, and the multi-functional sprinkler head 7 automatically switches to water jet mode for cooling. At the same time, the control box 13 uploads the alarm information to the host computer 14 to remind ground personnel to pay attention.

[0044] The host computer 14 supports manual pause of the daily inspection mode. When the operator observes an anomaly in a certain area of ​​the thermal map on the host computer 14 (such as localized high temperature, smoke, etc., but not yet reaching the alarm threshold or the device not automatically stopping), they can manually click the pause button and then directly click on the abnormal area in the thermal map. After receiving the instruction, the control box 13 controls the water spray ball valve 6 to turn towards that area and turns on the high-pressure switch to perform targeted water spraying for cooling. After cooling is completed, the operator can manually click the resume button, and the device will resume the daily inspection mode and continue to perform the preset mobile inspection tasks.

[0045] Through the above configuration and logic, this device realizes all-round fire prevention and extinguishing functions, including daily preventive water spraying, graded early warning and automatic fire extinguishing, intelligent ignoring of steady-state hot spots, and intuitive human intervention. It can effectively replace manual inspection and meet the needs of advanced prevention and precise handling of external fires in coal mines.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic inspection and fire prevention / extinguishing device based on infrared thermal imaging, characterized in that, include: The base module includes a fixed track (1), a track belt (2) installed on the fixed track (1), a control valve (10) connected to the track belt (2), and a sliding base (3) installed on the fixed track (1) and fixedly connected to the track belt (2). The sliding base (3) is driven by the track belt (2) to move along the fixed track (1). The monitoring module includes a base (5) installed on the sliding base (3), a water spray ball valve (6) installed on the base (5), an infrared thermal imager (9) installed on the sliding base (3), a control box (13) connected to the infrared thermal imager (9) and the water spray ball valve (6) respectively, and a host computer (14) communicating with the control box (13). The control valve (10) has a rotating shaft (11) on which a communication cable (15) is wound. The free end of the communication cable (15) is connected to the infrared thermal imager (9). The rotating shaft (11) rotates synchronously with the track (2). The communication cable (15) is automatically wound up and down when the sliding base (3) moves.

2. The automatic inspection and fire prevention device based on infrared thermal imaging according to claim 1, characterized in that, The control valve (10) is fixed to one end of the fixed track (1). The control valve (10) drives the track belt (2) to rotate forward or backward, thereby driving the sliding base (3) to move back and forth along the fixed track (1).

3. The automatic inspection and fire extinguishing device based on infrared thermal imaging according to claim 1, characterized in that, The water spray ball valve (6) is equipped with a high-pressure switch inside, and the water spray ball valve (6) is equipped with a multi-functional nozzle (7) connected to the high-pressure switch and a high-pressure water pipe (8) for connecting to the well water source outside; the multi-functional nozzle (7) has a spray mode, a sprinkling mode and a jet water mode, and is controlled and switched by the control box (13).

4. The automatic inspection and fire extinguishing device based on infrared thermal imaging according to claim 1, characterized in that, Both the lens of the infrared thermal imager (9) and the water spray ball valve (6) can reciprocate along the conical space, and the adjustment angle of the water spray ball valve (6) is greater than the adjustment angle of the lens of the infrared thermal imager (9), so that the water spray range of the water spray ball valve (6) covers the illumination range of the lens of the infrared thermal imager (9).

5. An automatic inspection and fire extinguishing device based on infrared thermal imaging according to claim 1, characterized in that, The control box (13) is connected to the wiring port (12) on the control valve (10). The control box (13) is equipped with a touch screen, which is used to configure the inspection length and moving speed of the sliding base (3) along the fixed track (1), the warning temperature threshold and alarm temperature threshold of the infrared thermal imager (9), the water spraying mode and start-stop cycle of the water spray ball valve (6), and the driving direction and start-stop of the control valve (10). The control box (13) also communicates with the host computer (14) through the underground industrial ring network.

6. An automatic inspection and fire prevention method based on infrared thermal imaging, applied to the device described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Install the device and connect it to electricity and water; S2. The control valve (10) is controlled by the control box (13) to move the sliding base (3) to the initial position; S3. Set the inspection length and moving speed of the sliding base (3) along the fixed track (1), the warning temperature threshold and alarm temperature threshold of the infrared thermal imager (9), and the driving parameters of the control valve (10) through the control box (13) or the host computer (14). S4. Start the device through the control box (13) or the host computer (14) to enter the daily inspection mode. The sliding base (3) moves back and forth along the fixed track (1). The infrared thermal imager (9) monitors the area temperature in real time. When the monitored temperature exceeds the warning temperature threshold, the infrared thermal imager (9) uploads the warning information to the host computer (14) through the control box (13). After manual confirmation, the control box (13) controls the water spray ball valve (6) to lock the warning area and spray water to cool it down. When the monitored temperature exceeds the alarm temperature threshold, the control box (13) automatically controls the water spray ball valve (6) to open the high-pressure switch, lock the alarm area and spray water to cool it down, and at the same time uploads the alarm information to the host computer (14).

7. The automatic inspection and fire prevention method based on infrared thermal imaging according to claim 6, characterized in that, In S4, when the infrared thermal imager (9) identifies the warning temperature area, if the manual selection does not spray water to cool it down, and the warning area does not expand by more than 20% and there are no new hot spots in the next inspection, the sliding base (3) will not stop when it inspects the area again, but will only upload the warning information.

8. The automatic inspection and fire prevention method based on infrared thermal imaging according to claim 6, characterized in that, In S4, under the daily inspection mode, the control box (13) controls the water spray ball valve (6) to open in spray mode or water spray mode according to a preset cycle; when a warning or alarm is triggered and water spraying is required to cool down, the multi-functional nozzle (7) switches to water jet mode, and after the temperature of the monitored area returns to normal, the device resumes the daily inspection mode.

9. The automatic inspection and fire prevention method based on infrared thermal imaging according to claim 6, characterized in that, In S4, when the host computer (14) pauses the daily inspection mode, the user manually clicks on any area in the thermal map uploaded by the infrared thermal imager (9), and the control box (13) controls the water spray ball valve (6) to spray water to cool the area. After cooling, the daily inspection mode is restored.

10. The automatic inspection and fire prevention method based on infrared thermal imaging according to claim 6, characterized in that, The moving speed V of the sliding base (3) satisfies: 0.1m / s≤V≤0.5m / s.

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