Gas leakage source positioning system based on multispectral imaging

Abstract

The invention discloses a gas leakage source positioning system based on multispectral imaging, which comprises a gas leakage positioning supervision platform, and the gas leakage positioning supervision platform is in communication connection with a holder data acquisition unit, a gas leakage centering analysis unit, a gas data comprehensive processing unit and an early warning information linkage unit. According to the invention, the accurate position of the leakage source is positioned and calculated by realizing omnibearing scanning of the target area and comparing and converting the parallax among the spectral imaging display and the value of the overlapping area, and the positioning result is fed back on the user interface for display, so that the accuracy and environmental adaptability of gas leakage detection are improved, and the detection efficiency is improved. Rapid detection and accurate positioning of dangerous chemical gas leakage can be realized, the reliability of positioning a leakage source is improved, and the emergency response capability of a petrochemical park is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage detection, and in particular to a gas leakage source positioning system based on multispectral imaging. Background Art

[0002] In industrial production, such as petrochemicals, natural gas transmission, electricity and other fields, a large amount of hazardous gases and volatile organic compounds are used and stored. Gas leakage may cause serious accidents such as fire, explosion, and poisoning, which will not only pose a huge threat to personnel safety, but also cause environmental pollution, equipment damage and huge economic losses. In addition, in urban gas supply systems, it is also crucial to ensure the integrity and safety of pipelines and prevent gas leakage to ensure the safety and stability of residents' living environment.

[0003] In conjunction with the above content, it should be noted that: the Chinese patent application number CN2024107459089 discloses a gas alarm system for use on a gas generator. The system is constructed by arranging a bus and connecting related alarm devices of the same type to the bus, thereby forming an alarm system for gas detection. However, during actual use, due to the influence of the actual use environment, the above-mentioned related sensors are easily patchworked and connected, and the related portable monitoring instruments are prone to low efficiency in locating the source of leaked gas, and the detection capability decreases sharply with the increase of the monitoring distance. It is not suitable for large parks with complex leaked gas composition.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a gas leakage source positioning system based on multispectral imaging to solve the problems raised.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a gas leak source locating system based on multispectral imaging, comprising a gas leak locating and monitoring platform, wherein the gas leak locating and monitoring platform is communicatively connected to a pan / tilt data acquisition unit, a gas leak locating and analyzing unit, a gas data comprehensive processing unit, and an early warning information linkage unit;

[0007] The gas leak positioning and monitoring platform is constructed based on a multi-tube explosion-proof pan-tilt platform, and the multiple tubes of the multi-tube explosion-proof pan-tilt platform are respectively provided with a refrigerated infrared imaging module, a visible light imaging module, and a non-refrigerated infrared imaging module. After the gas leak positioning and monitoring platform is running and a monitoring instruction is generated, the pan-tilt data acquisition unit obtains the comprehensive gas leak data through the joint scanning of multiple groups of modules in the multi-tube explosion-proof pan-tilt platform after receiving the monitoring instruction, and sends the comprehensive gas leak data to the gas leak positioning and analysis unit;

[0008] After receiving the comprehensive gas leakage data, the gas leakage analysis unit splits the comprehensive gas leakage data according to the collection period and analyzes it to generate the weekly average performance value, and then derives the high-temperature gas thermal performance value Qi from the comprehensive gas leakage data based on the weekly average performance value. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean Draw a curve graph in a point-drawing manner to obtain an image supervision abnormality signal, and send the obtained image supervision abnormality signal to the gas data comprehensive processing unit and the early warning information linkage unit;

[0009] After receiving the image supervision anomaly signal, the gas data comprehensive processing unit analyzes and processes the collected data that generates the image supervision anomaly signal, and compares it with the pre-stored normalized natural distribution leakage gas content threshold to obtain the regional risk alarm signal and residual gas warning signal, and sends them to the early warning information linkage unit.

[0010] Furthermore, the gas leakage centering analysis unit performs a centering analysis process on the comprehensive gas leakage data, where the comprehensive gas leakage data includes the high-temperature gas thermal data stream collected by the refrigerated infrared imaging module, the visible light data stream collected by the visible light imaging module, and the long-wave gas data stream collected by the non-refrigerated infrared imaging module, and the high-temperature gas thermal data stream, the visible light data stream, and the long-wave gas data stream are marked as Qi, Wi, and Ei, respectively, where i is a natural number greater than zero, and is represented as the order of the frequency of each collection of multiple groups of data streams.

[0011] Furthermore, the acquisition period from the start time of a single detection of the multi-tube explosion-proof pan-tilt platform to the end time of data acquisition is obtained from the gas leak positioning monitoring platform, and it is evenly divided according to the acquisition frequency of the multi-tube explosion-proof pan-tilt platform. Specifically, five acquisitions are made into a small cycle, and the cycle average flow value is obtained from the data stream collected in the small cycle. It is marked as the weekly average performance value, and combined with the high-temperature gas thermal data flow Qi, the visible light data flow Wi and the long-wave gas data flow Ei to form the high-temperature gas thermal performance value Qi. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean .

[0012] Furthermore, the gas leakage analysis unit establishes a rectangular coordinate system with the small cycle as the X axis and the weekly average performance value as the Y axis, and the high temperature gas thermal performance value Qi is Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean By drawing a curve image by tracing points, the pre-stored correction baseline is obtained from the gas leak positioning monitoring platform and plotted on the rectangular coordinate system, thereby obtaining the high-temperature gas thermal performance value Qi. Mean , visible light performance value Wi Meanand long-wave gas expression value Ei Mean The overlap value of the overlap area between the image and the correction baseline is calibrated, and the overlap value of the overlap area is calibrated as the performance value overlap value. If there is a calibrated performance value overlap value, an image supervision abnormality signal is generated and sent to the gas data comprehensive processing unit and the early warning information linkage unit.

[0013] Furthermore, after receiving the image supervision abnormality signal, the gas data comprehensive processing unit analyzes and processes the performance value overlap value that generates the image supervision abnormality signal, and obtains the high-temperature gas thermal performance value Qi that constitutes the performance value overlap value. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean And obtain the pre-stored normalized natural distribution leakage gas content threshold from the gas leak positioning supervision platform, and compare it with the high temperature gas thermal performance value Qi Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean Multiple groups of high-temperature gas thermal data streams Qi, visible light data streams Wi and long-wave gas data streams Ei are compared step by step.

[0014] Furthermore, the gas data comprehensive processing unit performs comparison processing on the data stream that generates the image supervision abnormality signal, and at the same time, based on the acquisition cycle of the acquisition frequency, assists in determining and generating relevant comparison signals.

[0015] Furthermore, if the high-temperature gas thermal data flow Qi, visible light data flow Wi and long-wave gas data flow Ei in a small cycle are all greater than the leakage gas content threshold of the normalized natural distribution, and multiple groups of data streams increase step by step with the acquisition cycle, it is judged that there is a gas leakage risk in the area, a regional risk alarm signal is generated, and the regional risk alarm signal is sent to the early warning information linkage unit; if the high-temperature gas thermal data flow Qi, visible light data flow Wi and long-wave gas data flow Ei in a small cycle are all within the leakage gas content threshold range of the normalized natural distribution, and multiple groups of data streams do not increase step by step with the acquisition cycle, it is judged that there is detectable gas residue in the area, a residual gas warning signal is generated, and the residual gas warning signal is sent to the early warning information linkage unit.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention uses a multi-spectral imaging module through a multi-tube explosion-proof pan-tilt head to achieve all-round scanning of the target area. The cooled infrared imaging module is used to capture thermal imaging of high-temperature gas leaks, the visible light imaging module provides clear visible light images, and the uncooled infrared imaging module is used to capture thermal imaging of long-wave gas leaks. By comparing and converting the parallax between the spectral imaging displays and the values ​​of the overlapping areas, the precise position of the leakage source is calculated and the positioning result is fed back and displayed on the user interface.

[0018] 2. The present invention improves the accuracy and environmental adaptability of gas leak detection, can achieve rapid detection and precise positioning of hazardous gas leaks, and improve the reliability of locating the leak source, effectively enhancing the emergency response capability of the petrochemical park. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a block diagram of the overall multispectral system of the present invention;

[0021] Figure 2 This is a data comparison display diagram of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1 - Figure 2 As shown, this embodiment is a gas leak source positioning system based on multispectral imaging, including a gas leak positioning and monitoring platform, which is communicatively connected to a pan-tilt data acquisition unit, a gas leak location and analysis unit, a gas data comprehensive processing unit, and an early warning information linkage unit;

[0024] According to the actual use environment, such as in an indoor environment or a scene without significant additional radiation sources (including sunlight) in the surrounding area, when setting up a multi-spectral imaging gas leak source positioning system, it should be ensured that in the multi-spectral imaging gas leak source positioning system, the display content of each spectral imaging is ultimately displayed on the main controller display screen of the gas leak positioning and monitoring platform, and the characteristic points of the calibration target and the background can be clearly observed.

[0025] The relative position and size of the calibration targets in each imaging screen are kept consistent, and the current position of the multi-tube explosion-proof pan-tilt head in the device is fixed. The currently obtained calibration target imaging results are polar corrected in advance using the existing cloud-based algorithm to obtain the thresholds of the system parallax and correction baseline, which are then stored in the gas leak positioning monitoring platform for subsequent continuous monitoring.

[0026] When the multi-spectral imaging gas leak source positioning system is running, the gas leak positioning monitoring platform is built on a multi-tube explosion-proof pan-tilt platform, and the multiple tubes of the multi-tube explosion-proof pan-tilt platform are respectively equipped with a cooled infrared imaging module, a visible light imaging module and an uncooled infrared imaging module;

[0027] After the gas leak locating monitoring platform runs and generates a monitoring instruction, the gas leak locating monitoring platform sends the monitoring instruction to the pan-tilt data acquisition unit. After receiving the monitoring instruction, the pan-tilt data acquisition unit obtains the comprehensive gas leak data through the joint scanning of multiple groups of modules in the multi-tube explosion-proof pan-tilt, and sends the comprehensive gas leak data to the gas leak locating analysis unit.

[0028] After receiving the comprehensive gas leakage data, the gas leakage analysis unit splits the comprehensive gas leakage data according to the collection period and analyzes it to generate the weekly average performance value, and then derives the high-temperature gas thermal performance value Qi from the comprehensive gas leakage data based on the weekly average performance value. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean A curve graph is drawn in a point-by-point manner to obtain an image monitoring abnormality signal, which is then sent to the gas data comprehensive processing unit and the early warning information linkage unit. The gas leakage centering analysis unit performs the following centering analysis on the gas leakage comprehensive data:

[0029] The comprehensive gas leakage data includes the high-temperature gas thermal data stream collected by the refrigerated infrared imaging module, the visible light data stream collected by the visible light imaging module, and the long-wave gas data stream collected by the unrefrigerated infrared imaging module. The high-temperature gas thermal data stream, the visible light data stream, and the long-wave gas data stream are marked as Qi, Wi, and Ei, respectively, where i is a natural number greater than zero and represents the order of the frequency of each collection of multiple data streams.

[0030] After collecting the high-temperature gas thermal data stream Qi, visible light data stream Wi, and long-wave gas data stream Ei, data file packages are constructed in sequence according to the collection objects, and the corresponding high-temperature gas thermal data stream Qi, visible light data stream Wi, and long-wave gas data stream Ei are identified and named according to the collection frequency and collection period, and then stored in the corresponding data file packages respectively, so as to facilitate subsequent quick reading and serve as root data.

[0031] The acquisition period from the start time of a single detection of the multi-tube explosion-proof pan-tilt platform to the end time of data acquisition is obtained from the gas leak positioning supervision platform, and it is evenly divided according to the acquisition frequency of the multi-tube explosion-proof pan-tilt platform. Specifically, five acquisitions are made into a small cycle. The cycle average flow value is obtained from the data stream collected in the small cycle, marked as the weekly average performance value, and combined with the high-temperature gas thermal data stream Qi, the visible light data stream Wi and the long-wave gas data stream Ei to form the high-temperature gas thermal performance value Qi. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean , high temperature gas thermal performance value Qi Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean It is obtained by retrieving and converting the weekly average performance value from the data file packages of high-temperature gas thermal data stream Qi, visible light data stream Wi and long-wave gas data stream Ei.

[0032] The gas leakage analysis unit uses the small cycle as the X axis and the weekly average performance value as the Y axis to establish a rectangular coordinate system. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean Draw a curve image by tracing points, then obtain the pre-stored correction baseline from the gas leak positioning monitoring platform and draw it on the rectangular coordinate system, thereby obtaining the high-temperature gas thermal performance value Qi Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean The overlap value of the overlap area between the calibration baseline and the calibration baseline is calibrated as the performance value overlap value. If there is a calibrated performance value overlap value, an image supervision abnormality signal is generated and sent to the gas data comprehensive processing unit and the early warning information linkage unit. It should be noted that S represents the pre-stored calibration baseline and D represents the performance value overlap value. Figure 2 shown.

[0033] After receiving the abnormal image supervision signal, the early warning information linkage unit immediately generates text in the format of "monitoring area serial number 0292 / gas leak detection imaging abnormality / predicted gas leakage / risk alarm / plan deployment processing started" and displays it on the main controller display screen of the multi-spectral imaging gas leak source positioning system. At the same time, the early warning and related information are pushed to the smart device with bound communication connection through the client software for feedback of the leakage point positioning detection result information.

[0034] Example 2: This example is a gas leak source location system based on multispectral imaging, including a gas data comprehensive processing unit that, upon receiving an image monitoring anomaly signal, analyzes and processes the collected data that generated the image monitoring anomaly signal, compares the data with a pre-stored normalized natural distribution leakage gas content threshold, obtains a regional risk alarm signal and a residual gas warning signal, and sends the signals to the early warning information linkage unit;

[0035] After receiving the image supervision abnormality signal, the gas data comprehensive processing unit analyzes and processes the performance value overlap value that generates the image supervision abnormality signal, and obtains the high-temperature gas thermal performance value Qi that constitutes the performance value overlap value. Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean And obtain the pre-stored normalized natural distribution leakage gas content threshold from the gas leak positioning supervision platform, and compare it with the high temperature gas thermal performance value Qi Mean , visible light performance value Wi Mean and long-wave gas expression value Ei Mean Multiple groups of high-temperature gas thermal data streams Qi, visible light data streams Wi and long-wave gas data streams Ei are compared step by step;

[0036] The gas data comprehensive processing unit compares and processes the data stream that generates the image supervision abnormality signal. At the same time, based on the acquisition frequency and the acquisition cycle, it assists in judging and generating relevant comparison signals. The specific process is as follows:

[0037] If the high-temperature gas thermal data stream Qi, visible light data stream Wi, and long-wave gas data stream Ei within a small period are all greater than the normalized natural distribution leakage gas content threshold, and multiple groups of data streams increase step by step with the collection cycle, it is determined that there is a gas leakage risk in the area and there is a risk of continuous gas leakage and diffusion. A regional risk alarm signal is generated and sent to the early warning information linkage unit;

[0038] Upon receiving a regional risk alarm signal, the early warning information linkage unit immediately generates text such as "Monitoring area serial number 0292 / Gas leakage risk / Plant area alarm / Backup plan processing initiated" and displays it on the main controller display screen of the multispectral imaging gas leak source location system. It also immediately retrieves relevant on-site recordings captured by surveillance cameras or other equipment in the monitored area and communicates it, along with the root cause data, to the main control room display screen.

[0039] The gas leak location monitoring platform determines the distance between the gas leak point and the multi-tube explosion-proof pan-tilt head and monitoring camera based on the data recorded by the on-site monitoring camera and the data comparison during the collection period. It also infers the leakage diffusion speed and coverage through other software or cloud data. It is used to provide correct guidance to on-site remediation personnel and ensure proper gas leak remediation operations. The client software sends early warnings and related information to smart devices with bound communication connections for feedback of leakage point location detection results.

[0040] If the high-temperature gas thermal data stream Qi, the visible light data stream Wi, and the long-wave gas data stream Ei within a small period are all within the normalized naturally distributed leakage gas content threshold range, and the multiple data streams do not increase step by step with the acquisition cycle, it is determined that there is detectable gas residue in the area, and a residual gas warning signal is generated and sent to the early warning information linkage unit;

[0041] After receiving the residual gas warning signal, the early warning information linkage unit immediately generates text in the format of "Monitoring area serial number 0292 / Gas leakage residual / Danger warning / Notice cleaning" and displays it on the main controller display screen of the multi-spectral imaging gas leakage source positioning system. At the same time, the early warning and related information are pushed to the smart device with bound communication connection through the client software, so as to facilitate the rapid dispatch of relevant professionals to clean up the residual gas.

[0042] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A gas leak source positioning system based on multispectral imaging, including a gas leak positioning monitoring platform, characterized in that: The gas leak location monitoring platform is communicatively connected to a pan / tilt data acquisition unit, a gas leak location analysis unit, a gas data comprehensive processing unit and an early warning information linkage unit; The gas leak positioning monitoring platform is constructed based on a multi-tube explosion-proof pan-tilt platform, and the multi-tubes of the multi-tube explosion-proof pan-tilt platform are respectively provided with a refrigerated infrared imaging module, a visible light imaging module, and a non-refrigerated infrared imaging module. After the gas leak positioning monitoring platform is running and a monitoring instruction is generated, the pan-tilt data acquisition unit obtains the comprehensive gas leak data through a joint scan of multiple groups of modules in the multi-tube explosion-proof pan-tilt platform after receiving the monitoring instruction, and sends the comprehensive gas leak data to the gas leak positioning analysis unit; After receiving the comprehensive gas leakage data, the gas leakage analysis unit splits the comprehensive gas leakage data according to the collection period and analyzes it to generate the weekly average performance value, and derives the high-temperature gas thermal performance value Qi from the comprehensive gas leakage data according to the weekly average performance value. Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean Draw a curve graph in a point-drawing manner to obtain an image supervision abnormality signal, and send the obtained image supervision abnormality signal to the gas data comprehensive processing unit and the early warning information linkage unit; After receiving the image supervision abnormality signal, the gas data comprehensive processing unit analyzes and processes the collected data that generates the image supervision abnormality signal, and compares it with the pre-stored normalized natural distribution leakage gas content threshold to obtain the regional risk alarm signal and residual gas warning signal, and send them to the early warning information linkage unit.

2. The gas leakage source positioning system based on multispectral imaging according to claim 1 is characterized in that: The gas leakage centering analysis unit performs a centering analysis process on the comprehensive gas leakage data as follows. The comprehensive gas leakage data includes a high-temperature gas thermal data stream collected by a cooling infrared imaging module, a visible light data stream collected by a visible light imaging module, and a long-wave gas data stream collected by a non-cooling infrared imaging module. The high-temperature gas thermal data stream, the visible light data stream, and the long-wave gas data stream are marked as Qi, Wi, and Ei, respectively, where i is a natural number greater than zero, and is represented as the order of the frequency of each collection of multiple groups of data streams.

3. The gas leakage source positioning system based on multispectral imaging according to claim 2 is characterized in that: The collection period from the start time of a single detection of the multi-tube explosion-proof pan-tilt to the end time of data collection is obtained from the gas leak positioning monitoring platform, and it is evenly divided according to the collection frequency of the multi-tube explosion-proof pan-tilt. Specifically, five collections are made into a small period, and the period average flow value is obtained from the data stream collected in the small period, which is marked as the weekly average performance value, and combined with the high-temperature gas thermal data stream Qi, the visible light data stream Wi and the long-wave gas data stream Ei to form the high-temperature gas thermal performance value Qi. Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean .

4. The gas leakage source positioning system based on multi-spectral imaging according to claim 3 is characterized in that: The gas leakage centering analysis unit establishes a rectangular coordinate system with the small cycle as the X-axis and the weekly average performance value as the Y-axis. Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean The curve image is drawn by plotting points, and the pre-stored correction baseline is obtained from the gas leak positioning monitoring platform and plotted on the rectangular coordinate system, thereby obtaining the high-temperature gas thermal performance value Qi. Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean The overlap value of the overlap area between the correction baseline is calibrated as the performance value overlap value. If there is a calibrated performance value overlap value, an image supervision abnormality signal is generated and sent to the gas data comprehensive processing unit and the early warning information linkage unit.

5. The gas leakage source positioning system based on multi-spectral imaging according to claim 1, characterized in that: After receiving the image supervision abnormality signal, the gas data comprehensive processing unit analyzes and processes the performance value overlap value that generates the image supervision abnormality signal, and obtains the high-temperature gas thermal performance value Qi constituting the performance value overlap value. Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean The pre-stored normalized natural distribution leakage gas content threshold is obtained from the gas leak positioning supervision platform, and compared with the high-temperature gas thermal performance value Qi Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean The multiple groups of high-temperature gas thermal data streams Qi, visible light data streams Wi and long-wave gas data streams Ei are compared step by step.

6. The gas leakage source positioning system based on multi-spectral imaging according to claim 5, characterized in that: The gas data comprehensive processing unit performs comparison processing on the data stream that generates the image supervision abnormal signal, and at the same time, based on the acquisition cycle of the acquisition frequency, assists in determining and generating relevant comparison signals.

7. The gas leakage source positioning system based on multi-spectral imaging according to claim 6, characterized in that: If the high-temperature gas thermal data flow Qi, visible light data flow Wi and long-wave gas data flow Ei in a small period are all greater than the leakage gas content threshold of normalized natural distribution, and multiple groups of data flows increase step by step with the collection cycle, it is judged that there is a gas leakage risk in the area, and a regional risk alarm signal is generated, and the regional risk alarm signal is sent to the early warning information linkage unit; If the high-temperature gas thermal data flow Qi, the visible light data flow Wi and the long-wave gas data flow Ei in a small cycle are all within the threshold range of the leakage gas content of the normalized natural distribution, and the multiple groups of data streams do not increase step by step with the collection cycle, it is judged that there is detectable gas residue in the area, and a residual gas warning signal is generated, and the residual gas warning signal is sent to the early warning information linkage unit.

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