A method and device for monitoring the stability of a pressure equalizing ring

Abstract

The present application provides a method and device for monitoring the stability of an equalizing ring, which belongs to the field of equalizing ring monitoring, and the method includes: periodically emitting laser pulses to the equalizing ring through a laser scanner set at a monitoring point, and obtaining feedback data of the surface of the equalizing ring by using a receiving lens; extracting the key points of the equalizing ring from the feedback data; determining the monitoring distance between the key points and the monitoring points according to the feedback data; calculating the calculated distance between the key points and the monitoring points by using a cross-sectional scanning method; obtaining the distance difference between the monitoring distance and the calculated distance by comparing the monitoring distance with the calculated distance; and judging the stability state of the equalizing ring according to the comparison result of the distance difference with a preset threshold. The present application is based on laser detection and data analysis to judge whether the equalizing ring is damaged or not, and can quickly and effectively detect the stability state of the equalizing ring, and improves work efficiency compared to manual inspections.

Description

Technical Field

[0001] The present application relates to the field of pressure equalizing ring monitoring, and in particular to a pressure equalizing ring stability monitoring method and device. Background Art

[0002] The Northwest Power Grid faces some unique challenges due to its special geographical environment. First, due to the high altitude and strong wind and sand, the construction environment of the hub substation is particularly harsh. In these extreme environments, the grading ring of the substation and its lower supporting components are often tested by strong wind loads, and are prone to failures such as fracture and tilt, which may cause large-scale power outages in the power grid and have a serious impact on power supply.

[0003] Secondly, earthquakes are also an important factor affecting the safety of substation equipment. When an earthquake occurs, substation equipment may suffer large-scale failures, and the assessment of the extent of equipment damage is directly related to the repair, replacement, and re-commissioning period. Therefore, how to quickly and accurately assess the damage to equipment in the station has become an urgent problem to be solved.

[0004] At present, the monitoring of the operating status of the grading ring mainly adopts manual inspection for visual inspection. However, this method has low inspection efficiency, and problems can only be found when there are obvious fractures in the supporting body and ring body of the grading ring, and there is a lack of effective means to evaluate its potential damage status. In addition, due to the high voltage characteristics of the grading ring, the staff cannot observe its operating status at close range, which further increases the difficulty of monitoring. Summary of the invention

[0005] The purpose of the present application is to overcome the problems existing in the above-mentioned prior art and to provide a method and device for monitoring the stability of a pressure equalizing ring.

[0006] The present application provides a method for monitoring the stability of a pressure equalizing ring, comprising:

[0007] The laser scanner disposed at the monitoring point periodically emits laser pulses to the pressure equalizing ring, and the receiving lens on the laser scanner receives the laser pulses to obtain feedback data on the surface of the pressure equalizing ring;

[0008] Extracting key points of the pressure equalizing ring from the feedback data;

[0009] Determine the monitoring distance between the key point and the monitoring point according to the feedback data;

[0010] The cross-sectional scanning method is used to calculate the distance between the key point and the monitoring point;

[0011] By comparing the monitored distance with the calculated distance, a distance difference between the monitored distance and the calculated distance is obtained;

[0012] The stability state of the pressure equalizing ring is determined according to a comparison result between the distance difference and a preset threshold.

[0013] Optionally, determining a monitoring distance between the key point and the monitoring point according to the feedback data includes:

[0014] The feedback data is corrected according to preset pressure equalizing ring parameters, and the monitoring distance is extracted from the corrected feedback data.

[0015] Optionally, before extracting the key points of the pressure equalizing ring from the feedback data, the method includes:

[0016] The feedback data is screened to remove other interfering data on the surface and other equalizing ring data except for the key points.

[0017] Optionally, judging the stability state of the pressure equalizing ring according to a comparison result between the distance difference and a preset threshold value further includes:

[0018] Set the horizontal plane as the reference line;

[0019] The angle between the equalizing ring represented by the key point and the reference line is determined. If the angle is not vertical, the foundation damage state of the equalizing ring is determined.

[0020] Optionally, extracting key points of the pressure equalizing ring from the feedback data includes:

[0021] The key points are extracted from the feedback data using a data mining algorithm.

[0022] Optionally, the key point includes: the point where the lower support of the pressure equalizing ring is subjected to the maximum bending moment load.

[0023] The present application also provides a pressure equalizing ring stability monitoring device, comprising:

[0024] A data module, used to periodically emit laser pulses to the pressure equalizing ring through a laser scanner arranged at a monitoring point, and receive the laser pulses through a receiving lens on the laser scanner to obtain feedback data on the surface of the pressure equalizing ring;

[0025] An extraction module, used for extracting key points of the pressure equalizing ring from the feedback data;

[0026] A measuring module, used to determine the monitoring distance between the key point and the monitoring point according to the feedback data;

[0027] A calculation module, used for calculating the distance between the key point and the monitoring point by using a cross-sectional scanning method;

[0028] A comparison module, configured to obtain a distance difference between the monitored distance and the calculated distance by comparing the monitored distance with the calculated distance;

[0029] A judgment module is used to judge the stability state of the pressure equalizing ring according to the comparison result of the distance difference and a preset threshold.

[0030] Optionally, the judging module judges the stability state of the pressure equalizing ring according to the comparison result between the distance difference and a preset threshold, and further includes:

[0031] Set the horizontal plane as the reference line;

[0032] The angle between the equalizing ring represented by the key point and the reference line is determined. If the angle is not vertical, the foundation damage state of the equalizing ring is determined.

[0033] Optionally, the extraction module extracts key points of the pressure equalizing ring from the feedback data, including:

[0034] The key points are extracted from the image of the three-dimensional model using a data mining algorithm.

[0035] Optionally, the key point includes: the point where the lower support of the pressure equalizing ring is subjected to the maximum bending moment load.

[0036] The beneficial effects of this application are:

[0037] The present application provides a method for monitoring the stability of an equalizing ring, comprising: periodically emitting laser pulses to the equalizing ring through a laser scanner arranged at a monitoring point, and receiving the laser pulses through a receiving lens on the laser scanner to obtain feedback data on the surface of the equalizing ring; extracting key points of the equalizing ring from the feedback data; determining the monitoring distance between the key points and the monitoring point according to the feedback data; calculating the calculated distance between the key points and the monitoring point using a cross-sectional scanning method; obtaining the distance difference between the monitoring distance and the calculated distance by comparing the monitoring distance with the calculated distance; and judging the stability state of the equalizing ring according to the comparison result of the distance difference with a preset threshold. The present application is based on laser detection and data analysis to judge whether the equalizing ring is damaged or not, and can quickly and effectively detect the stability state of the equalizing ring, and improves work efficiency compared to manual inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the pressure equalizing ring stability monitoring process in this application;

[0039] Figure 2 It is a schematic diagram of the locations of key points in this application;

[0040] Figure 3It is a schematic diagram of the pressure equalizing ring stability monitoring device in this application. DETAILED DESCRIPTION

[0041] The present application is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it.

[0042] Please refer to Figure 1 As shown, a method for monitoring the stability of a pressure equalizing ring comprises the following steps:

[0043] S101, periodically emitting laser pulses to a pressure equalizing ring through a laser scanner arranged at a monitoring point, and receiving the laser pulses through a receiving lens on the laser scanner to obtain feedback data of the surface of the pressure equalizing ring.

[0044] Select one or more pressure equalizing rings with typical structures as the research object. Typical structures include common design styles, size specifications, material types, etc., so that the research results are representative and universal.

[0045] For example, a substation located at a high altitude area is selected.

[0046] The laser inside the laser scanner emits a continuous or periodic signal laser beam. The laser beam is precisely controlled and focused through a series of optical elements (such as lenses, reflectors, etc.) and accurately irradiated onto the pressure equalizing ring.

[0047] When the laser beam hits the surface of the voltage equalizing ring, part of the light will be reflected back according to the law of reflection. The receiving lens is responsible for capturing the reflected light and focusing it onto the photodetector.

[0048] The photodetector converts the received light signal into an electrical signal (feedback data). After amplification and filtering, these electrical signals are transmitted to the signal processor for further analysis and processing.

[0049] S102 extracts key points of the pressure equalizing ring from the feedback data.

[0050] The feedback data obtained after the scanning and processing operation is used to obtain the three-dimensional coordinate data of the target area using the system software to establish a three-dimensional model.

[0051] For example, the feedback data includes a large amount of point cloud data, that is, each point in the target area irradiated by the laser beam corresponds to a three-dimensional coordinate.

[0052] Next, the data is imported into the system software, the point cloud data is converted into three-dimensional coordinate data, and a preliminary three-dimensional model is generated. This model shows the three-dimensional form of the pressure equalization ring and its surrounding environment, including terrain, vegetation, buildings, etc.

[0053] After obtaining the 3D model, the data is further screened and processed to focus on analyzing the status of the pressure equalization ring itself. Specifically, the data screening tool in the system software is used to remove other interfering data on the surface. These interfering data include vegetation, rocks, buildings, etc. on the ground, which are not directly helpful for analyzing the status of the pressure equalization ring.

[0054] After removing the surface interference data, the equalizing ring body data is further screened.

[0055] Since the pressure equalizing ring is a complex structure composed of multiple nodes and connectors, but the present application is only interested in certain key points. Therefore, the selection function of the software is used to select only the data of these key points or areas, and exclude the data of other non-critical parts. Figure 3 As shown, the key points on the pressure equalizing ring include: key point 201, key point 202, key point 203, key point 204, key point 205, key point 206, key point 207, key point 208, key point 209, and key point 210.

[0056] In specific operations, information mining technology can be used to determine key points. For example, based on the design drawings or actual structure of the pressure equalizing ring, the positions of key points or areas are marked on the 3D model. Then, these areas are selected using the selection tool of the software and their data is extracted. In this way, a 3D model containing only key points or areas is obtained.

[0057] S103 determines the monitoring distance between the key point and the monitoring point according to the feedback data.

[0058] The feedback data mentioned above include the distance between each cloud point and the detection point for detecting the pressure equalizing ring. The distance of each key point is extracted from the feedback data as the monitoring distance.

[0059] S104 uses a cross-sectional scanning method to calculate the distance between the key point and the monitoring point.

[0060] Determine the positions of the sections that need to be scanned. These sections are cross sections of the pressure equalizing ring at different heights, representing the positions of the key points.

[0061] Obtain detailed point cloud data of the section and calculate the distance using the section scanning method.

[0062] Specifically, along a specified section, feedback data of the key points on the pressure equalizing ring are obtained, and three-dimensional coordinate data of the key points are extracted.

[0063] These data include the position information of key points in three-dimensional space. The distance calculation expression is as follows:

[0064]

[0065] Among them, x1, x2, y1, y2, z1, z2 are the three-dimensional coordinate values ​​of the two cloud points.

[0066] Furthermore, tilt correction is performed for position errors of the laser scanner, such as errors caused by the central axis not being vertically downward.

[0067] By comparing the difference between the horizontal reference plane in the laser scanning data and the actual horizontal plane in the preset parameters of the equalizing ring, the inclination angle is calculated, and the calculated distance in the feedback data is adjusted and corrected according to the inclination angle.

[0068] The corrected data will more accurately reflect the actual position and shape of the pressure equalizing ring.

[0069] S105 obtains a distance difference between the monitored distance and the calculated distance by comparing the monitored distance with the calculated distance.

[0070] Use statistics or data analysis software to fit the calculated distance and the monitored distance. The fitting method is selected according to the distribution characteristics and accuracy requirements of the data, such as linear fitting, polynomial fitting or nonlinear fitting. The goal of fitting is to find a model that can best reflect the relationship between the calculated distance and the monitored distance.

[0071] By fitting the data, we can observe the differences between the actual measured values ​​and the calculated distances of the pressure equalizing ring and the support body. These differences are manifested as significant deviations between the actual distances and the calculated distances of some nodes.

[0072] S106: judging the stability state of the pressure equalizing ring according to the comparison result between the distance difference and a preset threshold.

[0073] If the data difference is too large, exceeding the preset threshold or standard range, it can be determined that a certain part of the pressure equalizing ring body and the support has deformed or other hidden dangers. This is because deformation or hidden dangers usually cause the actual distance of the key point to change, which in turn causes a significant deviation between the calculated distance and the monitored distance.

[0074] Furthermore, the angle between the overall structural data of the equalizing ring and the horizontal reference line is calculated and evaluated.

[0075] Determine a horizontal reference line. The reference line is a horizontal plane based on the ground or other fixed reference point.

[0076] Measure the angle between the overall structural data of the pressure equalizing ring and the horizontal reference line. This angle reflects the inclination of the pressure equalizing ring relative to the horizontal plane.

[0077] Among them, if the angle is not vertical (that is, the angle is not equal to 90 degrees), the following situations may exist:

[0078] The pressure equalizing ring tilts as a whole;

[0079] The support of the pressure equalizing ring is damaged or the foundation is unstable;

[0080] Deformation caused by other external factors (such as wind, earthquake, etc.).

[0081] After discovering that the angle is not vertical, the status of the equalizing ring and its supporting parts should be further observed in combination with the inspection method. The observation content may include the degree of damage to the foundation, the integrity of the supporting parts, the deformation of the equalizing ring, etc. Based on the inspection results and the angle data, the damage status of the equalizing ring and its supporting parts is evaluated. If there are hidden dangers, corresponding maintenance or reinforcement measures should be formulated to ensure the safe and stable operation of the equalizing ring.

[0082] like Figure 3 As shown, the present application also provides a pressure equalizing ring stability monitoring device, comprising:

[0083] A data module, used to periodically emit laser pulses to the pressure equalizing ring through a laser scanner arranged at a monitoring point, and receive the laser pulses through a receiving lens on the laser scanner to obtain feedback data on the surface of the pressure equalizing ring;

[0084] An extraction module, used for extracting key points of the pressure equalizing ring from the feedback data;

[0085] A measuring module, used to determine the monitoring distance between the key point and the monitoring point according to the feedback data;

[0086] A calculation module, used for calculating the distance between the key point and the monitoring point by using a cross-sectional scanning method;

[0087] A comparison module, configured to obtain a distance difference between the monitored distance and the calculated distance by comparing the monitored distance with the calculated distance;

[0088] A judgment module is used to judge the stability state of the pressure equalizing ring according to the comparison result of the distance difference and a preset threshold.

[0089] Furthermore, the judging module judges the stability state of the pressure equalizing ring according to the comparison result between the distance difference and the preset threshold, and further includes:

[0090] Set the horizontal plane as the reference line;

[0091] The angle between the equalizing ring represented by the key point and the reference line is determined. If the angle is not vertical, the foundation damage state of the equalizing ring is determined.

[0092] Furthermore, the extraction module extracts the key points of the pressure equalization ring from the feedback data, including:

[0093] The key points are extracted from the image of the three-dimensional model using a data mining algorithm.

[0094] Furthermore, the key point includes: the point where the lower support of the equalizing ring bears the maximum bending moment load.

Claims

1. A method for monitoring the stability of a pressure equalizing ring, characterized in that: include: A laser scanner arranged at a monitoring point periodically emits laser pulses to the pressure equalizing ring, and receives the laser pulses through a receiving lens on the laser scanner to obtain feedback data on the surface of the pressure equalizing ring; Extracting key points of the pressure equalizing ring from the feedback data includes: constructing a three-dimensional model according to the feedback data, and screening out preset key points from the three-dimensional model; Determine the monitoring distance between the key point and the monitoring point according to the distance between each cloud point included in the feedback data and the detection point for detecting the pressure equalizing ring; The cross-sectional scanning method is used to calculate the distance between the key point and the monitoring point; By comparing the monitored distance with the calculated distance, a distance difference between the monitored distance and the calculated distance is obtained; The stability state of the pressure equalizing ring is determined according to a comparison result between the distance difference and a preset threshold.

2. The method for monitoring the stability of a pressure equalizing ring according to claim 1, characterized in that: Determining the monitoring distance between the key point and the monitoring point according to the feedback data includes: The feedback data is corrected according to preset pressure equalizing ring parameters, and the monitoring distance is extracted from the corrected feedback data.

3. The method for monitoring the stability of a pressure equalizing ring according to claim 1, characterized in that: Before extracting the key points of the pressure equalizing ring from the feedback data, it includes: The feedback data is screened to remove other interfering data on the surface and other equalizing ring data except for the key points.

4. The method for monitoring the stability of a pressure equalizing ring according to claim 1, characterized in that: Judging the stability state of the pressure equalizing ring according to the comparison result between the distance difference and the preset threshold value, further comprising: Set the horizontal plane as the reference line; The angle between the equalizing ring represented by the key point and the reference line is determined. If the angle is not vertical, the foundation damage state of the equalizing ring is determined.

5. The method for monitoring the stability of a pressure equalizing ring according to claim 1, characterized in that: Extracting the key points of the pressure equalizing ring from the feedback data includes: The key points are extracted from the feedback data using a data mining algorithm.

6. The method for monitoring the stability of a pressure equalizing ring according to claim 1, characterized in that: The key points include: the points where the lower support of the equalizing ring bears the largest bending moment load.

7. A pressure equalizing ring stability monitoring device, characterized in that: include: A data module, used to periodically emit laser pulses to the pressure equalizing ring through a laser scanner arranged at a monitoring point, and receive the laser pulses through a receiving lens on the laser scanner to obtain feedback data on the surface of the pressure equalizing ring; An extraction module is used to extract key points of the pressure equalizing ring from the feedback data, including: constructing a three-dimensional model according to the feedback data, and screening out preset key points from the three-dimensional model; A measuring module, used to determine the monitoring distance between the key point and the monitoring point according to the distance between each cloud point included in the feedback data and the detection point for detecting the pressure equalizing ring; A calculation module, used for calculating the distance between the key point and the monitoring point by using a cross-sectional scanning method; A comparison module, configured to obtain a distance difference between the monitored distance and the calculated distance by comparing the monitored distance with the calculated distance; A judgment module is used to judge the stability state of the pressure equalizing ring according to the comparison result of the distance difference and a preset threshold.

8. The pressure equalizing ring stability monitoring device according to claim 7, characterized in that: The judging module judges the stability state of the pressure equalizing ring according to the comparison result between the distance difference and the preset threshold, and further includes: Set the horizontal plane as the reference line; The angle between the equalizing ring represented by the key point and the reference line is determined. If the angle is not vertical, the foundation damage state of the equalizing ring is determined.

9. The pressure equalizing ring stability monitoring device according to claim 7, characterized in that: The extraction module extracts the key points of the pressure equalizing ring from the feedback data, including: The key points are extracted from the image of the three-dimensional model using a data mining algorithm.

10. The pressure equalizing ring stability monitoring device according to claim 7, characterized in that: The key points include: the points where the lower support of the equalizing ring bears the largest bending moment load.

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