A gas leakage monitoring system and method based on data analysis

Abstract

The present invention relates to the technical field of chemical gas leakage warning technology, and discloses a gas leakage monitoring system and method based on data analysis. The system includes a gas data acquisition module, a gas leakage point positioning module and a leakage processing module. The gas data acquisition module includes a fixed gas monitoring unit and a mobile gas leakage monitoring unit. The gas leakage point positioning module includes a gas leakage warning unit, a pre-positioning unit and a secondary positioning unit. The system receives the gas concentration in the factory monitored by the fixed gas monitoring unit through the gas leakage warning unit, and determines whether to issue a warning. If a warning is issued, the pre-positioning unit is called to pre-position the leakage point. After pre-positioning, the mobile gas leakage monitoring unit is called to perform secondary positioning at the pre-positioning position to obtain the highest point of gas concentration. After determining the highest point of gas concentration, a secondary warning is issued and sent to the staff, thereby achieving the effect of rapid warning and positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical gas leakage early warning technology, and in particular to a gas leakage monitoring system and method based on data analysis. Background Art

[0002] Gas leak detection has always been a key issue in industrial production. Traditional gas leak detection methods typically involve shutting down the equipment, applying soapy water to the surface of the monitoring area, and observing for bubbles to identify the leak point. This method is time-consuming and has low detection accuracy. With the advancement of detection technology, portable remote gas leak detection devices have emerged in the prior art. These devices monitor for gas leaks by manually controlling a laser beam to scan a target area, typically a gas pipeline or the vicinity of a gas pipeline network. However, using these portable remote gas leak detection devices for gas leak detection inevitably carries the risk of operators missing scans. Because they are manually operated, even a focused operator may accidentally forget to point to certain areas. Consequently, using these portable remote gas leak detection devices for gas leak detection is difficult to ensure reliable gas leak detection. During the monitoring and early warning process for sudden gas leaks, the leak area can be unclear or the leak area can be large, making early warning ineffective. This can lead to maintenance difficulties and potentially further spread of chemical gases. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a gas leakage monitoring system and method based on data analysis, which has the advantages of quickly determining the monitoring and early warning points of leakage and facilitating the work of staff, thereby solving the above technical problems.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a gas leakage monitoring system based on data analysis, comprising a gas data acquisition module, a gas leakage point location module and a leakage processing module;

[0005] The gas data acquisition module includes a fixed gas monitoring unit and a mobile gas leakage monitoring unit. The fixed gas monitoring unit is used to monitor the gas concentration in the factory at a fixed point and send the data to the gas leakage point positioning module in real time.

[0006] The gas leakage point positioning module includes a gas leakage warning unit, a pre-positioning unit and a secondary positioning unit. The gas leakage warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue an early warning. If an early warning is issued, the pre-positioning unit is called to pre-position the leakage point. After the pre-positioning, the mobile gas leakage monitoring unit is called to perform secondary positioning at the pre-positioned location to obtain the highest gas concentration point.

[0007] The leakage processing module is called after the secondary positioning is completed, and is used to issue a secondary warning and send the secondary warning to the staff.

[0008] As the preferred technical solution of the present invention, the fixed gas monitoring unit collects data from different sensors for analysis, and is used to monitor the gas concentration, gas concentration growth rate and pressure of each section of the pipeline in the factory at the current moment, and the first The expressions of the gas concentration and gas concentration growth rate at the current moment monitored by a fixed gas monitoring unit are as follows:

[0009] ;

[0010] in, Indicates the Gas concentration sampling set of a fixed gas monitoring unit, Indicates the Fixed gas monitoring units The gas concentration at the time, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The specific expression of the gas concentration growth rate at the moment is as follows:

[0011] ;

[0012] in, Indicates the Fixed gas monitoring units Gas concentration at a given moment.

[0013] As a preferred technical solution of the present invention, the gas leakage warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue an early warning. If an early warning is issued, the specific steps are as follows:

[0014] When Fixed gas monitoring units Gas concentration at the time When the gas concentration exceeds the preset warning value, an early warning is issued, and the BIM data map of the factory is obtained. After marking the corresponding points, the pre-positioning unit is called to pre-position the leakage point;

[0015] When Fixed gas monitoring units Gas concentration at the time No warning will be issued if the gas concentration does not exceed the preset warning value.

[0016] As a preferred technical solution of the present invention, the specific steps of the pre-positioning unit for pre-positioning the leakage point are as follows:

[0017] Step A1: Read the marked BIM data of the factory building and convert it into a 2D plan of all marked points;

[0018] Step A2: For the two-dimensional plane graph of all marked points, use Welzl's algorithm to solve the minimum covering circle and its corresponding center coordinates;

[0019] Step A3: Send the coverage area of ​​the minimum coverage circle and the coordinates of the center of the coverage area of ​​the minimum coverage circle to the mobile gas leakage monitoring unit to complete pre-positioning.

[0020] As a preferred technical solution of the present invention, the specific steps of the mobile gas leakage monitoring unit performing secondary positioning are as follows:

[0021] Step B1: Calculate the area ratio of the minimum coverage circle ;

[0022] Step B2: When the area covered by the minimum coverage circle accounts for When the coverage ratio exceeds the set threshold, step B3 is executed. When the coverage ratio of the minimum coverage circle is greater than the coverage ratio of the minimum coverage circle, step B3 is executed. If the coverage ratio does not exceed the set threshold, execute step B6;

[0023] Step B3: Read the first Fixed gas monitoring units The gas concentration growth rate at the moment and the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment is calculated comprehensively to obtain the Leakage risk factor for a fixed gas monitoring unit ;

[0024] Step B4: Determine Leakage risk factor for a fixed gas monitoring unit Whether it exceeds the preset leakage risk threshold, if so, the first The fixed gas monitoring units are marked, and the leakage risk coefficients of all fixed gas monitoring units in the coverage area of ​​the minimum coverage circle are traversed in turn to obtain several secondary marking points;

[0025] Step B5: Several mobile gas leakage monitoring units traverse the secondary marked points in sequence, output the highest gas concentration point, and complete the secondary positioning;

[0026] Step B6: Set several mobile gas leakage monitoring units at equal intervals on the circumference of the coverage area of ​​the minimum coverage circle, and move toward the center coordinates of the coverage area of ​​the minimum coverage circle until they reach the center coordinates of the coverage area of ​​the minimum coverage circle and stop, and output several highest gas concentration points collected in the moving path.

[0027] As a preferred technical solution of the present invention, the area ratio of the minimum coverage circle covered area in step B1 is calculated. The specific expression is as follows:

[0028] ;

[0029] in, Indicates the area ratio of the minimum coverage circle, represents the area covered by the minimum covering circle, Indicates the factory area.

[0030] As a preferred technical solution of the present invention, the Leakage risk factor for a fixed gas monitoring unit The specific expression is as follows:

[0031] ;

[0032] in, represents the leakage risk coefficient of the fixed gas monitoring unit, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The gas concentration growth rate at time Indicates the Fixed gas monitoring units cover the regional pipeline standard pressure, They represent two weight coefficients whose sum is 1.

[0033] As a preferred technical solution of the present invention, the leakage processing module also includes emitting an audible and visual alarm when the gas leakage warning unit issues an early warning, reminding staff to evacuate, and closing the factory building opening by 85% to 95%.

[0034] As the preferred technical solution of the present invention, the mobile gas leakage monitoring unit includes a drone equipped with detection instruments and remote-controlled ground equipment. The leakage processing module outputs a real-time leakage value after receiving several gas concentration peak points, and sends it to the staff port for viewing via a wireless network.

[0035] The present invention also provides a gas leakage monitoring method based on data analysis, based on the above-mentioned gas leakage monitoring system based on data analysis, comprising the following steps:

[0036] Step 1: Use a fixed gas monitor to monitor the gas concentration in the factory and determine whether an early warning is issued. If no early warning is issued, terminate the step; if an early warning is issued, proceed to step 2.

[0037] Step 2: Pre-locate the leak point and use the mobile gas leak monitoring equipment to locate the secondary fixed gas monitoring unit to obtain the highest gas concentration point;

[0038] Step 3: After the secondary positioning is completed, a secondary warning is issued and sent to the staff in combination with the secondary positioning.

[0039] Compared with the prior art, the present invention provides a gas leakage monitoring system and method based on data analysis, which has the following beneficial effects:

[0040] The present invention receives the gas concentration in the factory monitored by the fixed gas monitoring unit through the gas leakage early warning unit, and determines whether to issue an early warning. If an early warning is issued, the pre-positioning unit is called to pre-position the leakage point. After the pre-positioning, the mobile gas leakage monitoring unit is called to perform secondary positioning at the pre-positioning position to obtain the highest point of gas concentration. After determining the highest point of gas concentration, a secondary early warning is issued and sent to the staff, thereby achieving the effect of rapid early warning and positioning, and ensuring the rapid progress of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the system framework of the present invention;

[0042] Figure 2 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figure 1-Figure 2 , a gas leakage monitoring system based on data analysis, including a gas data acquisition module, a gas leakage point positioning module and a leakage processing module;

[0045] The gas data acquisition module includes a fixed gas monitoring unit and a mobile gas leakage monitoring unit. The fixed gas monitoring unit is used to monitor the gas concentration in the factory at a fixed point and send the data to the gas leakage point positioning module in real time.

[0046] The fixed gas monitoring unit collects data from different sensors for analysis and is used to monitor the current gas concentration, gas concentration growth rate and pressure of each section of the pipeline in the plant. The expressions of the gas concentration and gas concentration growth rate at the current moment monitored by a fixed gas monitoring unit are as follows:

[0047] ;

[0048] in, Indicates the Gas concentration sampling set of a fixed gas monitoring unit, Indicates the Fixed gas monitoring units The gas concentration at the time, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The specific expression of the gas concentration growth rate at the moment is as follows:

[0049] ;

[0050] in, Indicates the Fixed gas monitoring units Gas concentration at the time;

[0051] The gas leakage point positioning module includes a gas leakage warning unit, a pre-positioning unit and a secondary positioning unit. The gas leakage warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue an early warning. If an early warning is issued, the pre-positioning unit is called to pre-position the leakage point. After pre-positioning, the mobile gas leakage monitoring unit is called to perform secondary positioning at the pre-positioned location to obtain the highest gas concentration point.

[0052] The gas leakage warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue an early warning. The specific steps for issuing an early warning are as follows:

[0053] When Fixed gas monitoring units Gas concentration at the time When the gas concentration exceeds the preset warning value, an early warning is issued, and the BIM data map of the factory is obtained. After marking the corresponding points, the pre-positioning unit is called to pre-position the leakage point;

[0054] When Fixed gas monitoring units Gas concentration at the time No warning will be issued if the gas concentration does not exceed the preset warning value.

[0055] The specific steps for the pre-location unit to pre-locate the leak point are as follows:

[0056] Step A1: Read the annotated BIM data of the factory building and convert it into a 2D plan view of all annotated points. The BIM model contains the 3D structural information of the factory building. The generated 2D plan view accurately reflects key locations such as equipment, passages, and walls, avoiding positional deviations caused by 3D complexity. The complex 3D coordinates are converted into 2D coordinates, reducing the computational complexity of the subsequent Welzl's algorithm.

[0057] Step A2: For the two-dimensional planar graph of all annotated points, Welzl's algorithm is used to find the minimum covering circle and its corresponding center coordinates. The time complexity of Welzl's algorithm is O(n), which is far superior to brute-force search methods (such as exhaustively enumerating all three-point combinations) and is suitable for large-scale point calculations. The minimum covering circle can accurately contain all annotated points and has a minimal radius, avoiding resource waste caused by overly large monitoring areas.

[0058] Step A3: Send the minimum coverage circle coverage area and the center coordinates of the minimum coverage circle coverage area to the mobile gas leakage monitoring unit to complete pre-positioning. By using the center coordinates as the target center point and combining them with the coverage radius, the monitoring range can be quickly narrowed to avoid blind search.

[0059] The specific steps for secondary positioning using a mobile gas leak monitoring unit are as follows:

[0060] Step B1: Calculate the area ratio of the minimum coverage circle , where the calculation can clearly determine the size of the minimum covering circle;

[0061] Step B2: When the area covered by the minimum coverage circle accounts for When the coverage ratio exceeds the set threshold, step B3 is executed. At this time, the minimum coverage circle area is too large, indicating that there may be multiple leakage points. It will waste a lot of time to traverse directly through the mobile gas leakage monitoring unit, and it cannot ensure that every leakage point is traversed. When the area of ​​the minimum coverage circle accounts for If the coverage ratio does not exceed the set threshold, the minimum coverage circle area is small, indicating that there may be only a small number of leakage points. Then, execute step B6.

[0062] Step B3: Read the first Fixed gas monitoring units The gas concentration growth rate at the moment and the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment is calculated comprehensively to obtain the Leakage risk factor for a fixed gas monitoring unit ;

[0063] Step B4: Determine Leakage risk factor for a fixed gas monitoring unit Whether it exceeds the preset leakage risk threshold, if so, the first The fixed gas monitoring units are marked, and the leakage risk coefficients of all fixed gas monitoring units in the coverage area of ​​the minimum coverage circle are traversed in turn to obtain several secondary marking points;

[0064] Step B5: Several mobile gas leakage monitoring units traverse the secondary marked points in sequence, output the highest gas concentration point, and complete the secondary positioning;

[0065] Step B6: Set several mobile gas leakage monitoring units at equal intervals on the circumference of the coverage area of ​​the minimum coverage circle, and move toward the center coordinates of the coverage area of ​​the minimum coverage circle until they reach the center coordinates of the coverage area of ​​the minimum coverage circle and stop, and output several highest gas concentration points collected in the moving path.

[0066] Calculate the area ratio of the minimum coverage circle in step B1 The specific expression is as follows:

[0067] ;

[0068] in, Indicates the area ratio of the minimum coverage circle, represents the area covered by the minimum covering circle, Indicates the factory area.

[0069] No. Leakage risk factor for a fixed gas monitoring unit The specific expression is as follows:

[0070] ;

[0071] in, Indicates the Leakage risk factor of a fixed gas monitoring unit, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The gas concentration growth rate at time Indicates the Fixed gas monitoring units cover the regional pipeline standard pressure, Represent two weight coefficients whose sum is 1;

[0072] The leak handling module is called after the secondary positioning is completed to issue a secondary warning and send the secondary warning to the staff;

[0073] The leakage handling module also includes sound and light alarms when the gas leakage warning unit issues an early warning, reminding staff to evacuate and closing the factory opening by 85% to 95%.

[0074] The leakage processing module outputs the real-time leakage value after receiving several gas concentration peak points, and sends it to the staff port for viewing via the wireless network;

[0075] The mobile gas leak monitoring unit includes the equipment listed in Table 1 below:

[0076]

[0077] Example 1:

[0078] This embodiment calculates the area ratio of the minimum coverage circle covered area Less than the coverage ratio threshold = 0.31, at this time, three mobile gas leakage drones are set up on the circumference of the minimum coverage circle, and they are evenly distributed around the circumference of the minimum coverage circle and output the two highest gas concentration points, which are then inspected by staff;

[0079] Example 2: This example calculates the area ratio of the minimum coverage circle Greater than the coverage ratio threshold = 0.31, the calculated See Table 2 below:

[0080] Table 2

[0081]

[0082] At this time, the calculated values ​​are traversed in descending order, thereby speeding up the inspection and repair of multi-point leakage;

[0083] The above embodiments only provide one or more feasible solutions, which do not represent the optimal solution. The threshold value is set to facilitate comparison. The size of the threshold value depends on the amount of sample data and the number of bases set by technicians in this field for each group of sample data. As long as it does not affect the proportional relationship between the parameter and the quantized value, and the size of the weight can be determined by technicians in this field based on each sample data and multiple rounds of experiments, the above formulas are all calculated by removing the dimension and taking the numerical value.

[0084] The present invention also provides a gas leakage monitoring method based on data analysis, based on the above-mentioned gas leakage monitoring system based on data analysis, comprising the following steps:

[0085] Step 1: Use a fixed gas monitor to monitor the gas concentration in the factory and determine whether an early warning is issued. If no early warning is issued, terminate the step; if an early warning is issued, proceed to step 2.

[0086] Step 2: Pre-locate the leak point and use mobile gas leak monitoring equipment for secondary positioning to obtain the point with the highest gas concentration;

[0087] Step 3: After the secondary positioning is completed, a secondary warning is issued and sent to the staff in combination with the secondary positioning.

[0088] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A gas leak monitoring system based on data analysis, characterized by: It includes gas data acquisition module, gas leakage point location module and leakage treatment module; The gas data acquisition module includes a fixed gas monitoring unit and a mobile gas leakage monitoring unit. The fixed gas monitoring unit is used to monitor the gas concentration in the factory at a fixed point and send the data to the gas leakage point positioning module in real time. The gas leak point location module includes a gas leak warning unit, a pre-positioning unit, and a secondary positioning unit. The gas leak warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue an early warning. If an early warning is issued, the pre-positioning unit is called to pre-position the leak point. After pre-positioning, the mobile gas leak monitoring unit is called to perform secondary positioning at the pre-positioned location to obtain the point with the highest gas concentration. The specific steps of the pre-locating unit for pre-locating the leakage point are as follows: Step A1: Read the marked BIM data of the factory building and convert it into a 2D plan of all marked points; Step A2: For the two-dimensional plane graph of all marked points, use Welzl's algorithm to solve the minimum covering circle and its corresponding center coordinates; Step A3: sending the coverage area of ​​the minimum coverage circle and the coordinates of the center of the coverage area of ​​the minimum coverage circle to the mobile gas leakage monitoring unit to complete pre-positioning; The specific steps of the mobile gas leakage monitoring unit for secondary positioning are as follows: Step B1: Calculate the area ratio of the minimum coverage circle ; Step B2: When the area covered by the minimum coverage circle accounts for When the coverage ratio exceeds the set threshold, step B3 is executed. When the coverage ratio of the minimum coverage circle is greater than the coverage ratio of the minimum coverage circle, step B3 is executed. If the coverage ratio does not exceed the set threshold, execute step B6; Step B3: Read the first Fixed gas monitoring units The gas concentration growth rate at the moment and the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment is calculated comprehensively to obtain the Leakage risk factor for a fixed gas monitoring unit ; Step B4: Determine Leakage risk factor for a fixed gas monitoring unit Whether it exceeds the preset leakage risk threshold, if so, the first The fixed gas monitoring units are marked, and the leakage risk coefficients of all fixed gas monitoring units in the coverage area of ​​the minimum coverage circle are traversed in turn to obtain several secondary marking points; Step B5: Several mobile gas leakage monitoring units traverse the secondary marked points in sequence, output the highest gas concentration point, and complete the secondary positioning; Step B6: several mobile gas leakage monitoring units are equidistantly arranged at the circumference of the minimum coverage circle, and are moved toward the center coordinates of the minimum coverage circle until they reach the center coordinates of the minimum coverage circle, and the mobile gas leakage monitoring units are outputted as the highest gas concentration points collected along the movement path. The leakage processing module is called after the secondary positioning is completed, and is used to issue a secondary warning and send the secondary warning to the staff.

2. A gas leakage monitoring system based on data analysis according to claim 1, characterized in that: The fixed gas monitoring unit collects data from different sensors for analysis and is used to monitor the gas concentration, gas concentration growth rate and pressure of each section of the pipeline in the factory at the current moment. The expressions of the gas concentration and gas concentration growth rate at the current moment monitored by a fixed gas monitoring unit are as follows: ； in, Indicates the Gas concentration sampling set of a fixed gas monitoring unit, Indicates the Fixed gas monitoring units The gas concentration at the time, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The specific expression of the gas concentration growth rate at the moment is as follows: ； in, Indicates the Fixed gas monitoring units Gas concentration at a given moment.

3. A gas leakage monitoring system based on data analysis according to claim 2, characterized in that: The gas leakage warning unit is used to receive the gas concentration in the factory monitored by the fixed gas monitoring unit and determine whether to issue a warning. If a warning is issued, the specific steps are as follows: When Fixed gas monitoring units Gas concentration at the time When the gas concentration exceeds the preset warning value, an early warning is issued, and the BIM data map of the factory is obtained. After marking the corresponding points, the pre-positioning unit is called to pre-position the leakage point; When Fixed gas monitoring units Gas concentration at the time No warning will be issued if the gas concentration does not exceed the preset warning value.

4. The gas leakage monitoring system based on data analysis according to claim 1, characterized in that: In step B1, the area ratio of the minimum coverage circle is calculated. The specific expression is as follows: ； in, Indicates the area ratio of the minimum coverage circle, represents the area covered by the minimum covering circle, Indicates the factory area.

5. A gas leakage monitoring system based on data analysis according to claim 4, characterized in that: The said Leakage risk factor for a fixed gas monitoring unit The specific expression is as follows: ； in, Indicates the Leakage risk factor of a fixed gas monitoring unit, Indicates the Fixed gas monitoring units The pressure of the pipeline in the coverage area at the moment, Indicates the Fixed gas monitoring units The gas concentration growth rate at time Indicates the Fixed gas monitoring units cover the regional pipeline standard pressure, They represent two weight coefficients whose sum is 1.

6. A gas leakage monitoring system based on data analysis according to claim 5, characterized in that: The leakage processing module also includes emitting an audible and visual alarm when the gas leakage warning unit issues an early warning, reminding staff to evacuate, and closing the factory building opening by 85% to 95%.

7. A gas leakage monitoring system based on data analysis according to claim 6, characterized in that: The mobile gas leakage monitoring unit includes a drone equipped with a detection instrument and a remote-controlled ground device. The leakage processing module outputs a real-time leakage value after receiving several gas concentration peak points, and sends it to the staff port for viewing via a wireless network.

8. A gas leakage monitoring method based on data analysis, based on the gas leakage monitoring system based on data analysis according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Use a fixed gas monitor to monitor the gas concentration in the factory and determine whether an early warning is issued. If no early warning is issued, terminate the step; if an early warning is issued, proceed to step 2. Step 2: Pre-locate the leak point and use mobile gas leak monitoring equipment for secondary positioning to obtain the point with the highest gas concentration; Step 3: After the secondary positioning is completed, a secondary warning is issued and sent to the staff in combination with the secondary positioning.

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