Detection and early warning method for coal fire high-temperature area

Abstract

The invention relates to a detection and early warning method for a coal fire high-temperature area. The detection and early warning method for the coal fire high-temperature area comprises the steps that S10, a selected area is set, and an optical fiber detection system, a gas detection system and an infrared detection system are arranged in the selected area; s20, performing periodic detection through an optical fiber detection system; periodic detection is carried out through the gas detection system; periodic detection is carried out through an infrared detection system; s30, respectively forming a temperature distribution histogram, a gas content histogram and a temperature field distribution isothermal diagram; s40, obtaining the highest temperature value and the highest content value; and S50, according to the conditions of the highest temperature value and the highest content value, whether early warning is carried out or not is judged. The detection and early warning method for the coal fire high-temperature area has the advantage of being high in accuracy.

Description

Technical Field

[0001] This application relates to the technical field of coal and gas outburst early warning monitoring, and particularly to a detection and early warning method for high-temperature areas of coal fires. Background Art

[0002] Early warning of high-temperature areas of coal fires is an important topic in coal mine safety and environmental protection. Coal fire (also known as coal seam spontaneous combustion) refers to the phenomenon that coal seams contact with oxygen under natural conditions, undergo oxidation reactions, resulting in temperature rise and ultimately spontaneous combustion. Coal fires not only cause waste of resources but also release harmful gases, threatening the safety of miners and the ecological environment. Therefore, the early warning technology for high-temperature areas of coal fires is crucial.

[0003] Importance of early warning for high-temperature areas of coal fires: In terms of safety threats, coal fires may lead to accidents such as mine fires and explosions, threatening the lives of miners. In terms of resource waste, coal fires consume a large amount of coal resources, causing economic losses. In terms of environmental pollution, harmful gases (such as CO, CO 2 , SO 2 ) and particulate matter released by coal fires will pollute the air and soil. In terms of ecological damage, coal fires may lead to ecological problems such as surface subsidence and vegetation damage.

[0004] Currently, the early warning technology for high-temperature areas of coal fires mainly relies on temperature monitoring technology or magnetic prospecting technology. Affected by the depth of the coal seam, the accuracy of temperature monitoring technology is not high. Affected by the underground magnetic field and the interference of the complexity of underground substances, the accuracy of magnetic prospecting cannot be well guaranteed.

[0005] Therefore, in view of the existing technology, there is a problem of single detection method, which further leads to insufficient accuracy, and thus the accuracy of early warning is also not high. Summary of the Invention

[0006] Based on this, the purpose of this application is to provide a detection and early warning method for high-temperature areas of coal fires, which has high detection accuracy and can provide early warning.

[0007] On the one hand, this application provides a detection and early warning method for high-temperature areas of coal fires, including the steps of:

[0008] S10. Set a selected area, and respectively deploy an optical fiber detection system, a gas detection system, and an infrared detection system in the selected area;

[0009] S20. Periodically detect the temperature situation in the selected area through the optical fiber detection system; periodically detect the content of the measured gas in the selected area through the gas detection system; periodically detect the temperature distribution situation in the selected area through the infrared detection system;

[0010] S30. According to the detection results, respectively form a bar chart of temperature distribution, a bar chart of gas content, and an isotherm chart of temperature field distribution;

[0011] S40. Compare and obtain the highest temperature value in the bar chart of temperature distribution, compare and obtain the highest content value in the bar chart of gas content, and compare and obtain the highest temperature value in the isotherm chart of temperature field distribution;

[0012] S50. Judge whether to give an early warning according to the situation of the highest temperature value and the highest content value.

[0013] Regarding the detection and early warning method for the high-temperature area of coal fire in the present application, compared with the problem of inaccurate detection in the prior art, the detection and early warning method provided by the present application is more accurate, more reliable, and more comprehensive. First, the distributed optical fiber temperature measurement system is incorporated, enabling the detection of temperature to penetrate deep into the ground. Then, the gas content detection is incorporated to collect the combustion situation in the coal fire area. If a coal fire occurs, this information can be obtained through the gas content. Again, the infrared detection system is combined to comprehensively detect the temperature distribution on the ground surface. The optical fiber detection system has the problem of local distribution, while the infrared detection system solves the local problem and provides comprehensive detection. By combining the optical fiber detection system and the infrared detection system, both the comprehensiveness of detection and the accuracy of detection can be ensured. Finally, by combining gas detection and temperature detection, the accuracy is guaranteed, and the specific situation of the high-temperature area can be comprehensively known, and the specific location of the high-temperature area can be accurately obtained. Thus, ultimately, the high-temperature area can be accurately detected, and the specific location of the high-temperature area can be accurately obtained.

[0014] Further, the optical fiber detection system includes a distributed optical fiber temperature measurement system and an optical fiber bundle. One end of the optical fiber bundle is connected to the distributed optical fiber temperature measurement system;

[0015] The optical fiber bundle is in a spiral shape;

[0016] Any two adjacent optical fiber bundles form a group. The two adjacent optical fiber bundles are symmetrically distributed and form a double helix shape, and there are multiple intersection ranges; the sizes of the multiple intersection ranges are the same;

[0017] Multiple groups of the optical fiber bundles are arranged in parallel;

[0018] The optical fiber bundle is buried in the shallow layer of the ground surface;

[0019] Obtain the temperature on its corresponding optical fiber bundle through the distributed optical fiber temperature measurement system to form the temperature distribution curve of the optical fiber bundle. Divide the temperature distribution curve according to a fixed interval, and calculate the average temperature of each interval to generate a bar chart of each interval;

[0020] Flatten the selected area to obtain a reference plane, and project the positions of all fiber bundles into the reference plane;

[0021] Correspond each interval to the projection on the reference plane, thereby obtaining a bar chart of the temperature distribution in the selected area.

[0022] Furthermore, the infrared temperature measurement system includes a drone, an infrared thermal imager, and an image processing system;

[0023] The infrared thermal imager is installed at the bottom of the drone and is electrically connected to the drone;

[0024] The image processing system is used to receive and process the thermal infrared image captured by the infrared thermal imager and convert it into an isotherm map of the temperature field distribution;

[0025] In S40, according to the isotherm map of the temperature field distribution, compare each isotherm to find the highest temperature value of all convex points in the selected area;

[0026] Then, correspond the bar chart of the temperature distribution to the isotherm map of the temperature field distribution, and judge the relationship between each convex point and the intersection range;

[0027] If the convex point is within the intersection range, use the highest temperature value in the bar chart of the temperature distribution as the temperature value for early warning judgment, and record the number of the interval corresponding to this highest temperature value;

[0028] If the convex point is outside the intersection range, find the highest temperature value in the bar chart of the temperature distribution closest to this convex point as the temperature value for early warning judgment, and record the number of the interval corresponding to this highest temperature value.

[0029] Furthermore, in S20, obtain the detection data of the infrared detection system for two adjacent times;

[0030] In S40, compare the relative position relationship between the convex point positions of the two adjacent data and the intersection range. If the relative position relationship remains unchanged, use the current temperature value of the selected interval number for early warning judgment; if the relative position relationship changes from inside to outside, use the highest temperature value in the bar chart of the temperature distribution closest to this convex point as the temperature value for early warning judgment; if the relative position relationship changes from outside to inside, use the highest temperature value in the bar chart of the temperature distribution as the temperature value for early warning judgment.

[0031] Furthermore, in S50, judge whether to give an early warning according to the situation of the highest temperature value and the highest content value, including:

[0032] Set the primary temperature value, secondary temperature value, and temperature warning value respectively, and compare them with the highest temperature value used for warning judgment. When the highest temperature value used for warning judgment is between the primary temperature value and the secondary temperature value, a primary prompt is made. When the highest temperature value used for warning judgment is between the secondary temperature value and the temperature warning value, a secondary prompt is made. When the highest temperature value used for warning judgment is higher than the temperature warning value, a temperature warning prompt is made.

[0033] Set the CO content warning value and CO2 content warning value respectively. Obtain the measured content values of CO and CO2 through the gas detection system, and compare the measured content values with the content warning values. If any measured content value is higher than its corresponding content warning value, a content warning prompt is made.

[0034] Furthermore, set the warning temperature rise slope value. When the highest temperature value used for warning judgment is between the secondary temperature value and the temperature warning value, and the temperature rise slope value is greater than the warning temperature rise slope value, a temperature emergency warning prompt is made.

[0035] Furthermore, the gas detection system includes a processor and multiple gas detection components. The gas detection components include a mounting rod, a CO sensor, a CO2 detection module, a wireless communication module, and a photovoltaic module.

[0036] The mounting rod is vertically inserted into the surface of the coalfield. A spherical head with a cavity is formed at the upper part of the mounting rod, and air holes are formed on the wall surface of the spherical head. The CO sensor and the CO2 detection module are respectively placed inside the spherical head. The wireless communication module is installed inside the spherical head and is electrically connected to the CO sensor and the CO2 detection module respectively.

[0037] The photovoltaic module is installed outside the mounting rod and is electrically connected to the CO sensor, the CO2 detection module, and the wireless communication module respectively. The photovoltaic module is used for power supply.

[0038] Multiple wireless communication modules are wirelessly connected to form a wireless distributed communication system. This wireless distributed system is electrically connected to the processor. The data sending direction of the wireless communication module is unidirectional and fixed, and its data receiving direction is also unidirectional and fixed, and all data finally converges to the processor.

[0039] The gas detection components are installed within the intersection range.

[0040] In S20, obtain the CO content value through the CO sensor and obtain the CO2 content value through the CO2 detection module. The obtained data is sent to the established wireless communication module through the wireless communication module, and all data converges to the processor.

[0041] In S30, the data of the gas content is processed, and a bar chart of the gas content corresponding to each gas detection component is generated respectively. The bar chart of the gas content includes a bar chart of the CO content and a bar chart of the CO2 content.

[0042] Further, in S50, among the bar chart of the CO content and the bar chart of the CO2 content, the measured values that make the content warning prompt are selected as the highest content values used for warning judgment.

[0043] Moreover, the intersection range where the convex points in the isotherm diagram of the temperature field distribution are located is selected, and the data of the corresponding gas detection components are used as the basis for warning judgment.

[0044] When there are convex points in the isotherm diagram of the temperature field distribution within the intersection range, it is judged whether the highest temperature value or the highest content value reaches the warning standard. If any one of them reaches the warning standard, a warning prompt is made.

[0045] When the convex points in the isotherm diagram of the temperature field distribution are outside the intersection range, only the highest temperature value is judged whether it reaches the warning standard. If so, a warning prompt is made.

[0046] Further, the ventilation holes are obliquely arranged and are arranged in a direction with the inner side higher and the outer side lower relative to the ball head.

[0047] Further, in S10, a cloud server is also provided. The optical fiber detection system, the gas detection system, and the infrared detection system are respectively communicatively connected to the cloud server and are respectively communicatively connected to the terminal device through the cloud server.

[0048] For better understanding and implementation, the present application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flowchart of an exemplary method for detecting and warning the high-temperature area of a coal fire in the present application;

[0050] Figure 2 It is a schematic plan view of a basic unit in an exemplary optical fiber detection system of the present application;

[0051] Figure 3 It is a schematic plan view of a group of basic units in an exemplary optical fiber detection system of the present application;

[0052] Figure 4 It is a schematic diagram of an exemplary intersection range in the present application;

[0053] Figure 5 It is a schematic structural diagram of an exemplary mounting post in the present application;

[0054] Figure 6The projection view obtained by multiple optical fiber detection systems corresponding to the selected area of the present application on the reference plane;

[0055] Figure 7 The isothermal line diagram of the temperature field distribution generated within the selected area of the present application;

[0056] Figure 8 The schematic diagram of a bar chart of a section of temperature distribution of the present application. Detailed implementation manners

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0058] Please refer to Figures 1-8 As shown, an exemplary method for detecting and warning the high-temperature area of coal fire in the present application includes the steps:

[0059] S10. Set a selected area, and respectively arrange an optical fiber detection system, a gas detection system, and an infrared detection system within the selected area;

[0060] S20. Periodically detect the temperature situation within the selected area through the optical fiber detection system; periodically detect the content of the measured gas within the selected area through the gas detection system; periodically detect the temperature distribution situation within the selected area through the infrared detection system;

[0061] S30. According to the detection results, respectively form a bar chart of temperature distribution, a bar chart of gas content, and an isothermal line diagram of temperature field distribution;

[0062] S40. Compare and obtain the highest temperature value in the bar chart of temperature distribution, compare and obtain the highest content value in the bar chart of gas content, and compare and obtain the highest temperature value in the isothermal line diagram of temperature field distribution;

[0063] S50. Judge whether to give a warning according to the situation of the highest temperature value and the highest content value.

[0064] The detection and early warning method for the high-temperature area of coal fires described in this application is more accurate, reliable, and comprehensive compared to the inaccurate detection problems of the prior art. First, a distributed optical fiber temperature measurement system is incorporated to enable in-depth temperature detection on the ground. Then, gas content detection is combined to collect the combustion conditions in the coal fire area. If a coal fire occurs, this information can be obtained through the gas content. Thirdly, an infrared detection system is combined to comprehensively detect the temperature distribution on the ground surface. The optical fiber detection system has the problem of local distribution, while the infrared detection system solves the local problem and enables comprehensive detection. By combining the optical fiber detection system and the infrared detection system, both comprehensive detection and accurate detection can be ensured. Finally, gas detection and temperature detection are combined to ensure accuracy and comprehensively understand the specific situation of the high-temperature area, accurately obtaining the specific location of the high-temperature area. Thus, the high-temperature area can ultimately be accurately detected, and the specific location of the high-temperature area can be accurately obtained.

[0065] In some preferred embodiments, the optical fiber detection system includes a distributed optical fiber temperature measurement system and an optical fiber bundle. One end of the optical fiber bundle is connected to the distributed optical fiber temperature measurement system;

[0066] The optical fiber bundle is in a spiral shape;

[0067] Any two adjacent optical fiber bundles form a group. The two adjacent optical fiber bundles are symmetrically distributed and form a double spiral shape, and there are multiple intersection ranges formed; the sizes of the multiple intersection ranges are the same;

[0068] Multiple groups of the optical fiber bundles are arranged in parallel;

[0069] The optical fiber bundle is buried in the shallow layer of the ground surface;

[0070] The temperature on the corresponding optical fiber bundle is obtained through the distributed optical fiber temperature measurement system to form the temperature distribution curve of the optical fiber bundle. The temperature distribution curve is divided according to a fixed interval, and the average temperature of each interval is calculated to generate a histogram for each interval;

[0071] The selected area is flattened to obtain a reference plane, and the positions of all optical fiber bundles are projected into the reference plane;

[0072] Each interval is corresponded to the projection on the reference plane, thereby obtaining the temperature distribution histogram of the selected area.

[0073] The division of the interval is based on equal division of the entire optical fiber bundle according to the length. The average temperature of the temperature values within the length range of this interval is the temperature value of this interval.

[0074] The intersection range refers to the smallest unit in the closed range formed by the intersection of two optical fiber bundles. Multiple intersection ranges are formed by the intersection of two optical fiber bundles.

[0075] The operations of this application are carried out in the software of a computer, and the provided bar charts and isotherm diagrams are mainly used to facilitate intuitive connection for users. Therefore, when performing calculations, calculations are carried out through data, rather than based on bar charts and isotherm diagrams. For example, in a bar chart, the temperature value in a certain interval is 30, and this temperature value is presented at the height corresponding to 30 in the bar chart. When calculating, the value 30 is used, rather than based on the interval height in the bar chart. In addition, this application is also provided with a cloud server, and the bar charts and isotherm diagrams can also be sent to the user terminal through the cloud server so that users can intuitively understand the situation.

[0076] The optical fiber bundle in this application can adopt a conventional optical fiber bundle, and it is preferably a high-temperature-resistant optical fiber bundle; in order to enable the high-temperature use of the optical fiber bundle, a heat-insulating material can be wrapped on the surface of the optical fiber bundle to improve the heat-insulating effect. If the optical fiber bundle is wrapped with a heat-insulating material, then the temperature judgment benchmark needs to be lowered to adapt to the actual temperature situation.

[0077] The distributed optical fiber temperature measurement system of this application can be any solution in the prior art. In a prior art solution, this distributed optical fiber temperature measurement system includes a pulsed laser, a photoelectric conversion module, a data acquisition card, and a coupler. In some prior art solutions, this distributed optical fiber temperature measurement system is also called a distributed temperature sensing system, or a DTS (Distributed Temperature Sensor) system.

[0078] In some preferred embodiments, the infrared temperature measurement system includes a drone, a thermal imager, and an image processing system;

[0079] The thermal imager is installed at the bottom of the drone and is electrically connected to the drone;

[0080] The image processing system is used to receive and process the thermal infrared image captured by the thermal imager and convert it into an isotherm diagram of the temperature field distribution;

[0081] In S40, according to the isotherm diagram of the temperature field distribution, compare each isotherm to find the highest temperature value of all convex points in the selected area;

[0082] Then, correspond the temperature distribution bar chart with the isotherm diagram of the temperature field distribution, and judge the relationship between each convex point and the intersection range;

[0083] If the convex point is within the intersection range, then use the highest temperature value in the temperature distribution bar chart as the temperature value used for early warning judgment, and record the number of the interval corresponding to this highest temperature value;

[0084] If the convex point is outside the intersection range, find the highest temperature value in the temperature distribution histogram closest to the convex point, use it as the temperature value for early warning judgment, and record the number of the interval corresponding to this highest temperature value.

[0085] In Figure 8 In the shown section of the temperature distribution histogram, the number of the interval corresponding to the highest temperature value is A.

[0086] In a selected area, there may be multiple convex points, and usually there are multiple convex points. These convex points respectively represent the highest temperature within their respective ranges.

[0087] Set a number for each interval on each optical fiber bundle, so that the selected highest temperature value can find the corresponding interval and its corresponding number.

[0088] It should be supplemented that when the convex point is within a certain intersection range, find the highest temperature value within this intersection range, determine the number of this interval according to this highest temperature value and record it. On the one hand, this highest temperature value is used as the temperature value for early warning judgment. On the other hand, the temperature value of this interval number needs to be continuously observed, and only the temperature value of this interval number is observed to reduce the calculation amount.

[0089] Similarly, when the convex point is outside a certain intersection range, find the highest temperature value closest to the convex point. The interval where this highest temperature value is located has a corresponding number, and this number also needs to be recorded. The temperature change corresponding to this interval number also needs to be continuously observed.

[0090] For the method of obtaining the highest temperature value in this application, find the number of the interval where the highest temperature value is located, and just continuously pay attention to and calculate, which can reduce the calculation amount and operation intensity. If the number of the interval of the highest temperature value changes, then just take the new interval number as the object of attention. The methods and rules for the change of the interval number are described later.

[0091] Related technologies such as the isotherm in this application, the isothermal line diagram of the temperature field distribution, the processing of the thermal imaging diagram by the image processing system, and the combination of the unmanned aerial vehicle and the thermal imaging can all be obtained according to the existing technology, and will not be elaborated here.

[0092] In some preferred embodiments, in S20, obtain the detection data of the infrared detection system for two adjacent times;

[0093] In S40, the relative positional relationship between the bump positions of two adjacent data and the intersection range is compared. If the relative positional relationship remains unchanged, the current temperature value of the selected interval number is used for early warning judgment; if the relative positional relationship is from the inside to the outside, the highest temperature value in the temperature distribution histogram closest to the bump is used as the temperature value for early warning judgment; if the relative positional relationship is from the outside to the inside, the highest temperature value in the temperature distribution histogram is used as the temperature value for early warning judgment.

[0094] In each detection cycle, the detection and drawing of the temperature distribution histogram, the gas content histogram, and the isotherm diagram of the temperature field distribution are carried out respectively; two consecutive detections are performed to obtain two sets of data and graphs, so as to compare the two sets of data and graphs.

[0095] In some preferred embodiments, in S50, judging whether to give an early warning according to the highest temperature value and the highest content value includes:

[0096] The first-level temperature value, the second-level temperature value, and the temperature early warning value are set respectively, and the highest temperature value used for early warning judgment is compared respectively; when the highest temperature value used for early warning judgment is between the first-level temperature value and the second-level temperature value, a first-level prompt is made; when the highest temperature value used for early warning judgment is between the second-level temperature value and the temperature early warning value, a second-level prompt is made; when the highest temperature value used for early warning judgment is higher than the temperature early warning value, a temperature early warning prompt is made;

[0097] The CO content early warning value and the CO2 content early warning value are set respectively. The measured content values of CO and CO2 are obtained through the gas detection system, and the measured content values are compared with the content early warning values. If any measured content value is higher than its corresponding content early warning value, a content early warning prompt is made.

[0098] In some preferred embodiments, an early warning temperature rise slope value is set. When the highest temperature value used for early warning judgment is between the second-level temperature value and the temperature early warning value, and the temperature rise slope value is greater than the early warning temperature rise slope value, a temperature emergency early warning prompt is made.

[0099] When continuously observing the interval number corresponding to the highest temperature value, after detecting its multiple temperature values, a discrete point is generated. By connecting these points into a line, the slope value of the temperature value change can be calculated.

[0100] In some preferred embodiments, the gas detection system includes a processor and multiple gas detection components; the gas detection components include a mounting rod, a CO sensor, a CO2 detection module, a wireless communication module, and a photovoltaic module;

[0101] The installation rod is vertically inserted into the surface of the coalfield. A ball head with a cavity is formed at the upper part of the installation rod, and air holes are formed on the wall surface of the ball head. The CO sensor and the CO2 detection module are respectively placed inside the ball head; the wireless communication module is installed inside the ball head and is electrically connected to the CO sensor and the CO2 detection module respectively;

[0102] The photovoltaic module is installed outside the installation rod and is electrically connected to the CO sensor, the CO2 detection module, and the wireless communication module respectively; the photovoltaic module is used for power supply;

[0103] Multiple wireless communication modules are wirelessly connected to form a wireless distributed communication system; this wireless distributed system is electrically connected to the processor; the data sending direction of the wireless communication module is unidirectional and fixed, and its data receiving direction is also unidirectional and fixed, and all data finally converges into the processor;

[0104] The gas detection component is installed within the intersection range;

[0105] In S20, the CO content value is obtained through the CO sensor, and the CO2 content value is obtained through the CO2 detection module; the obtained data is sent to a predetermined wireless communication module through the wireless communication module, and all data converges into the processor;

[0106] In S30, the data of the gas content is processed, and a gas content histogram corresponding to each gas detection component is respectively generated. This gas content histogram includes a CO content histogram and a CO2 content histogram.

[0107] There are two relative position relationships between the photovoltaic module and the installation rod. One is to install the photovoltaic module on the installation rod, and the other is to install the photovoltaic module outside the installation rod.

[0108] To enhance the stability of the installation rod, a fixed fork is provided at the bottom end of the installation rod to strengthen the connection stability between the installation rod and the coalfield or the ground.

[0109] In some preferred embodiments, in S50, among the CO content histogram and the CO2 content histogram, the measured value that makes the content warning prompt is selected as the highest content value used for warning judgment;

[0110] And, the data of the gas detection component corresponding to the intersection range where the convex point of the isotherm of the temperature field distribution is located is selected as the basis for warning judgment;

[0111] When there is a convex point in the isotherm of the temperature field distribution within the intersection range, it is judged whether the highest temperature value or the highest content value reaches the warning standard. If any one of them reaches the warning standard, a warning prompt is made;

[0112] When the convex point in the isotherm diagram of the temperature field distribution is outside the intersection range, only judge whether the highest temperature value reaches the warning standard. If so, make a warning prompt.

[0113] In this application, the content values of CO and CO2 are used for calculation, while the CO content bar chart and the CO2 content bar chart are used to facilitate users to obtain information intuitively.

[0114] In some preferred embodiments, the ventilation holes are obliquely arranged and are arranged in a direction with a higher inner part and a lower outer part relative to the ball head.

[0115] In some preferred embodiments, in S10, a cloud server is further provided. The optical fiber detection system, the gas detection system, and the infrared detection system are respectively communicatively connected to the cloud server and are respectively communicatively connected to the terminal device through the cloud server.

[0116] Data can be sent to the mobile terminal through the cloud server, and users can remotely understand it through the programs or software of the mobile terminal.

[0117] The detection and warning method for the coal fire high-temperature area described in this application obtains accurate and range-limited data through the optical fiber detection system, obtains data with a comprehensive range but slightly poor accuracy through the infrared detection system, and supplements the accuracy of the data through the gas detection system. Thus, comprehensive and accurate data can be obtained. Furthermore, compared with the prior art, the situation of the coal fire high-temperature area can be obtained more accurately, and the highest temperature situation of the high-temperature area can be accurately obtained.

[0118] The above embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application.

Claims

1. A method for detecting and warning high temperature areas of coal fires, characterized in that: Includes steps: S10, setting a selected area, and respectively deploying an optical fiber detection system, a gas detection system, and an infrared detection system in the selected area; S20, periodically detecting the temperature in the selected area through the optical fiber detection system; periodically detecting the measured gas content in the selected area through the gas detection system; and periodically detecting the temperature distribution in the selected area through the infrared detection system; S30, forming a temperature distribution histogram, a gas content histogram, and a temperature field distribution isotherm diagram according to the detection results; S40, comparing and obtaining the highest temperature value in the temperature distribution histogram, comparing and obtaining the highest content value in the gas content histogram, and comparing and obtaining the highest temperature value in the temperature field distribution isotherm diagram; S50: Determine whether to issue an early warning based on the maximum temperature value and the maximum content value.

2. The method for detecting and warning high temperature areas of coal fire according to claim 1, characterized in that: The optical fiber detection system comprises a distributed optical fiber temperature measurement system and an optical fiber bundle, one end of the optical fiber bundle is connected to the distributed optical fiber temperature measurement system; The optical fiber bundle is in a spiral shape; Any two adjacent optical fiber bundles form a group, the two adjacent optical fiber bundles are symmetrically distributed and form a double helix, and form multiple intersection ranges; the sizes of the multiple intersection ranges are the same; A plurality of groups of optical fiber bundles are arranged in parallel; The optical fiber bundle is buried in a shallow layer of the ground; The temperature of the corresponding optical fiber bundle is obtained through a distributed optical fiber temperature measurement system to form a temperature distribution curve of the optical fiber bundle, the temperature distribution curve is divided into fixed intervals, and the average temperature of each interval is calculated to generate a bar graph of each interval; Planarizing the selected area to obtain a reference plane, and projecting the positions of all optical fiber bundles into the reference plane; Each interval is matched with the projection on the reference plane to obtain the temperature distribution histogram of the selected area.

3. The method for detecting and warning high temperature areas of coal fire according to claim 2, characterized in that: The infrared temperature measurement system includes a drone, a thermal imager, and an image processing system; The thermal imager is mounted on the bottom of the drone and is electrically connected to the drone; The image processing system is used to receive and process the thermal infrared image taken by the thermal imager, and convert it into a temperature field distribution isotherm diagram; In S40, according to the temperature field distribution isotherm diagram, each isotherm is compared to find the highest temperature value of all convex points in the selected area; Then, the temperature distribution histogram is matched with the temperature field distribution isotherm diagram to determine the relationship between each convex point and the intersection range; If the convex point is within the intersection range, the highest temperature value in the temperature distribution bar graph is used as the temperature value used for early warning judgment, and the number of the interval corresponding to the highest temperature value is recorded; If the convex point is outside the intersection range, the highest temperature value in the temperature distribution histogram closest to the convex point is found as the temperature value used for early warning judgment, and the number of the interval corresponding to the highest temperature value is recorded.

4. The method for detecting and warning high temperature areas of coal fire according to claim 3, characterized in that: In S20, the detection data of two consecutive infrared detection systems are obtained; In S40, the relative position relationship between the salient point positions of two adjacent data and the intersection range is compared, and if the relative position relationship remains unchanged, the current temperature value of the selected interval number is used for early warning judgment; If the relative position relationship is from inside to outside, the highest temperature value in the temperature distribution histogram closest to the convex point is used as the temperature value used for early warning judgment; If the relative position relationship is from outside to inside, the highest temperature value in the temperature distribution bar graph is used as the temperature value used for early warning judgment.

5. The method for detecting and warning high temperature areas of coal fire according to claim 4, characterized in that: In S50, judging whether to issue an early warning according to the maximum temperature value and the maximum content value includes: The first-level temperature value, the second-level temperature value, and the temperature warning value are set respectively, and the highest temperature value used for the warning judgment is compared respectively; when the highest temperature value used for the warning judgment is between the first-level temperature value and the second-level temperature value, a first-level prompt is made; when the highest temperature value used for the warning judgment is between the second-level temperature value and the temperature warning value, a second-level prompt is made; when the highest temperature value used for the warning judgment is higher than the temperature warning value, a temperature warning prompt is made; The CO content warning value and the CO2 content warning value are set respectively, and the actual measured values ​​of CO and CO2 content are obtained respectively through the gas detection system, and the actual measured values ​​of the content are compared with the content warning values. If any of the actual measured values ​​of the content is higher than its corresponding content warning value, a content warning prompt is issued.

6. The method for detecting and warning high temperature areas of coal fire according to claim 5, characterized in that: Set the warning temperature rise slope value. When the highest temperature value used for the warning judgment is between the secondary temperature value and the temperature warning value, and the temperature rise slope value is greater than the warning temperature rise slope value, a temperature emergency warning prompt is issued.

7. The method for detecting and warning high temperature areas of coal fire according to claim 5, characterized in that: The gas detection system includes a processor and a plurality of gas detection components; the gas detection components include a mounting rod, a CO sensor, a CO2 detection module, a wireless communication module, and a photovoltaic component; The mounting rod is vertically inserted into the surface of the coal field, a ball head with a cavity is formed on the upper part of the mounting rod, and a vent hole is formed on the wall of the ball head, and the CO sensor and the CO2 detection module are respectively placed in the ball head; the wireless communication module is installed in the ball head and is electrically connected to the CO sensor and the CO2 detection module respectively; The photovoltaic assembly is installed outside the mounting pole and is electrically connected to the CO sensor, the CO2 detection module, and the wireless communication module respectively; the photovoltaic assembly is used for power supply; A plurality of wireless communication modules are wirelessly connected to form a wireless distributed communication system; the wireless distributed system is electrically connected to the processor; the data transmission direction of the wireless communication module is unidirectional and fixed, the data receiving direction is also unidirectional and fixed, and all data are finally collected in the processor; The gas detection assembly is installed within the intersection range; In S20, the CO content value is obtained through the CO sensor, and the CO2 content value is obtained through the CO2 detection module; the obtained data is sent to the established wireless communication module through the wireless communication module, and all the data are collected in the processor; In S30, the gas content data is processed, and a gas content histogram corresponding to each gas detection component is generated respectively, and the gas content histogram includes a CO content histogram and a CO2 content histogram.

8. The method for detecting and warning high temperature areas of coal fire according to claim 7, characterized in that: In S50, the CO content bar graph and the CO2 content bar graph are selected, and the measured value for which a content warning prompt is made is selected as the highest content value used for warning judgment; Furthermore, the intersection range of the convex points in the temperature field distribution isotherm diagram is selected, and the data of the corresponding gas detection component is used as the basis for early warning judgment; When there is a convex point in the temperature field distribution isotherm diagram within the intersection range, it is determined whether the highest temperature value or the highest content value reaches the warning standard. If either of them reaches the warning standard, a warning prompt is issued; When the convex point in the temperature field distribution isotherm diagram is outside the intersection range, it is only judged whether the highest temperature value reaches the warning standard. If so, a warning prompt is issued.

9. The method for detecting and warning high temperature areas of coal fire according to claim 7, characterized in that: The vent holes are arranged obliquely, and are arranged in a direction of being higher inside and lower outside relative to the ball head.

10. The method for detecting and warning high temperature areas of coal fire according to any one of claims 1 to 9, characterized in that: In S10, a cloud server is also provided, and the optical fiber detection system, the gas detection system, and the infrared detection system are respectively connected to the cloud server for communication, and are respectively connected to the terminal device for communication through the cloud server.

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