Gas leak source location system based on multispectral imaging

Abstract

The present invention discloses a gas leakage source positioning system based on multi-spectral imaging, comprising a gas leakage positioning monitoring platform, wherein the gas leakage positioning monitoring platform is communicatively connected with a pan / tilt data acquisition unit, a gas leakage centering analysis unit, a gas data comprehensive processing unit and an early warning information linkage unit; the present invention realizes an all-round scanning of a target area, and then locates and calculates the precise position of the leakage source by comparing and converting the parallax between the spectral imaging displays and the numerical value of the overlapping area, and feeds back the positioning result for display on a user interface, thereby improving the accuracy and environmental adaptability of gas leakage detection, realizing rapid detection and precise positioning of hazardous gas leakage, improving the reliability of locating the leakage source, and effectively enhancing the emergency response capability of a petrochemical park.

Description

Technical Field

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

[0002] In industrial production, such as petrochemical, 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, poisoning, etc., 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 the urban gas supply system, it is also crucial to ensure the integrity and safety of the pipeline and prevent gas leakage to ensure the safety and stability of residents' living environment.

[0003] In combination with the above content, it should be explained that: the Chinese patent application number CN2024107459089 discloses a gas alarm system applied to a gas generator, which is formed by arranging a bus and hanging related alarm devices of the same type on the bus, thereby forming an alarm system for gas detection. However, during actual use, affected by the actual use environment, it is easy to cause the above-mentioned related sensors to be spliced ​​and connected and the related portable monitoring instruments to have low efficiency in locating the source of leaked gas, and the detection capability decreases sharply with the increase of monitoring distance, which is not suitable for large parks with complex leaked gas composition.

[0004] In view of the above-mentioned 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 multi-spectral imaging to solve the proposed problem.

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

[0007] 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;

[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 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;

[0009] 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.

[0010] Furthermore, the gas leakage locating and analyzing unit performs a locating and analyzing process on comprehensive gas leakage data, wherein 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, 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, wherein 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 collection period from the start time of a single detection of the multi-tube explosion-proof pan-tilt platform 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 platform. 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 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 the long-wave gas apparent value Ei Mean .

[0012] Furthermore, 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, and converts 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 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 Meanand 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.

[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 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.

[0014] Furthermore, 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.

[0015] Furthermore, 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 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, 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 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 realizes all-round scanning of the target area through a multi-spectral imaging module through a multi-tube explosion-proof pan / tilt. The refrigerated infrared imaging module is used to capture the thermal imaging of high-temperature gas leakage, the visible light imaging module provides clear visible light images, and the uncooled infrared imaging module is used to capture the thermal imaging of long-wave gas leakage. The precise position of the leakage source is calculated by comparing and converting the parallax between the spectral imaging displays and the values ​​of the overlapping areas, 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 leakage detection, can realize rapid detection and precise positioning of hazardous gas leakage, and improve the reliability of locating the leakage 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0020] Figure 1 is a block diagram of the overall multi-spectral 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 leakage source positioning system based on multispectral imaging, including a gas leakage positioning and monitoring platform, which is communicatively connected to a pan / tilt data acquisition unit, a gas leakage positioning 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 leakage source positioning system, it should be ensured that in the multi-spectral imaging gas leakage source positioning system, the display content of each spectral imaging is ultimately displayed on the display screen of the main controller of the gas leakage 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 gimbal in the equipment is fixed. The polar line correction of the currently obtained calibration target imaging results is performed in advance through the existing cloud-based algorithm to obtain the thresholds of the system parallax and correction baseline, which are stored inside the gas leak positioning supervision platform for subsequent continuous monitoring and backup.

[0026] When the multi-spectral imaging gas leak source positioning system is in operation, 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 cooled infrared imaging module, a visible light imaging module and a non-cooled infrared imaging module;

[0027] After the gas leak locating monitoring platform runs and generates monitoring instructions, the gas leak locating monitoring platform sends the monitoring instructions to the pan-tilt data acquisition unit. After receiving the monitoring instructions, 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 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 The curve graph is drawn in a point-drawing manner to obtain the image supervision abnormal signal, and the obtained image supervision abnormal signal is sent to the gas data comprehensive processing unit and the early warning information linkage unit; the gas leakage centering analysis unit performs the centering analysis process of the gas leakage comprehensive data as follows:

[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 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 in turn, where i is a natural number greater than zero and is expressed as the order of the frequency of each collection of multiple groups of data streams;

[0030] After acquiring 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 acquisition 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 acquisition frequency and acquisition 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 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 supervision 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. It 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 , high temperature gas thermal performance value Qi Mean , Visible light performance value Wi Mean and the long-wave gas apparent value Ei Mean It is retrieved and converted 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 based on the weekly average performance value.

[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 the long-wave gas apparent value Ei Mean The curve image is drawn by plotting points, and then 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 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. It should be noted that S represents the pre-stored correction 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 leakage detection imaging abnormality / predicted gas leakage / risk alarm / plan deployment and processing start" 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 for feedback of leakage point positioning detection result information.

[0034] Embodiment 2: This embodiment is a gas leakage source positioning system based on multispectral imaging, including a gas data comprehensive processing unit that analyzes and processes the collected data for generating the image supervision abnormality signal after receiving the image supervision abnormality signal, and compares it with the leakage gas content threshold of the pre-stored normalized natural distribution, obtains the regional risk alarm signal and the residual gas warning signal, and sends them 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 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 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 abnormal signal, and at the same time, based on the acquisition cycle of the acquisition frequency, assists in judging and generating relevant comparison signals. The specific process is as follows:

[0037] 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 there is a risk of continuous gas leakage and diffusion, and a regional risk alarm signal is generated and sent to the early warning information linkage unit;

[0038] After receiving the regional risk alarm signal, the early warning information linkage unit immediately generates text in the form of "monitoring area serial number 0292 / gas leakage risk / plant area alarm / backup plan processing start" and displays it on the display screen of the main controller of the multi-spectral imaging gas leakage source positioning system, and immediately retrieves the relevant on-site record information captured by the monitoring camera equipment or other equipment in the monitoring area, and connects it to the display screen of the main control room together with the root source data communication;

[0039] The gas leak location monitoring platform determines the distance between the gas leak point and the multi-cylinder 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, and 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. It also sends early warnings and related information to smart devices with bound communication connections through client software to provide feedback on the leak 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 in the small cycle are all within the normalized natural distribution of the leakage gas content threshold range, and the 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, and a residual gas warning signal is generated, and the residual gas warning signal is 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 / Notification of 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 quickly dispatch relevant professionals to clean up the residual gas.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. 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 data of gas leakage, the gas leakage analysis unit splits the comprehensive data of gas leakage according to the collection period and analyzes it to generate the weekly average performance value, and derives the high-temperature gas thermal performance value from the comprehensive data of gas leakage according to the weekly average performance value. QiMean , Visible light performance value WiMean and long-wave gas performance values EiMean 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 4 is 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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