Soil pressure monitoring method and equipment during impact current diffusion and medium

Abstract

The invention discloses a soil pressure monitoring method and device during impact current diffusion and a medium, and the method comprises the steps: obtaining a vertical grounding electrode and a horizontal grounding electrode of a target detection tower pole, constructing a space rectangular coordinate system based on the vertical grounding electrode and the horizontal grounding electrode of the target detection tower pole, and carrying out the pressure monitoring point selection; and acquiring multi-point pressure monitoring data in multiple directions, and calculating to obtain the pressure of the soil on the target detection tower pole. Pressure changes in multiple directions close to soil are obtained by measuring pressure of soil at different points in a space, and monitoring precision is improved by measuring stress in multiple directions at the same time. According to the method, the soil pressure borne by the target detection tower pole in different directions can be evaluated more accurately, so that the risk of soil pressure change during direct measurement of lightning ground diffusion in an actual scene is reduced, potential faults can be found in advance, and equipment damage caused by lightning stroke or grounding system abnormity is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pressure monitoring, and in particular to a method, equipment and medium for monitoring soil pressure when impulse current is dissipated. Background Art

[0002] The purpose of a lightning grounding system is to safely conduct lightning current into the ground to protect buildings and equipment. Measuring soil pressure can help evaluate the effectiveness of the grounding system. The grounding system conducts current through the soil, and changes in soil pressure reflect the load on the grounding system. Measuring soil pressure helps understand the conductivity of the soil, because the conductivity of the soil affects the distribution of lightning current and the effectiveness of the grounding system. Different types of soil have different conductivity, which directly affects the design and installation of the lightning grounding system. By measuring soil pressure, the design and arrangement of grounding electrodes can be optimized. For example, understanding the pressure changes in the soil under lightning current can help determine the optimal depth and arrangement of grounding electrodes to ensure uniform current distribution and reduce ground voltage rise.

[0003] Soil pressure changes caused by lightning currents may cause changes in soil structure, thus affecting the stability of the grounding system. Regular monitoring of soil pressure can help prevent grounding faults caused by soil pressure changes and ensure the long-term reliability of the system. Safety needs to be considered when designing lightning grounding systems. The measurement of soil pressure can help assess potential dangers under the action of lightning currents, such as the soil may become loose or unstable, thus affecting the safety of surrounding facilities and personnel. In short, measuring soil pressure during lightning grounding can provide key information about soil conductivity, grounding system performance, design optimization, safety and maintenance, ensuring the effectiveness and reliability of lightning grounding systems in actual use.

[0004] However, the current measurement methods for soil pressure when lightning strikes the ground are still imperfect. Lightning current is a short and high-intensity transient phenomenon, and the change in soil pressure is also transient. This rapid and drastic change is difficult to accurately capture with traditional measuring instruments, because the response speed of most instruments is not fast enough to keep up with the change of lightning current. At the same time, due to the limitations of sensors, sensors can often only measure pressure changes in a single direction, and cannot accurately measure pressure changes in two or more directions.

[0005] Lightning current is a short and high-intensity transient phenomenon, and the change in soil pressure is also transient. Therefore, when the energy of lightning current is transmitted to the soil, it will cause extreme changes in soil pressure, resulting in soil forces in multiple directions. Rapid and drastic changes in different directions are difficult to accurately capture with traditional measuring instruments, because the response speed of most instruments is not enough to keep up with the changes in lightning current. Due to the danger and unpredictability of lightning activities, measurement is very dangerous, which makes it very difficult to directly measure the change in soil pressure when lightning enters the ground in actual scenarios. Thundercloud channels are usually located in complex atmospheric environments, including strong electric fields, extreme temperatures, high humidity and strong winds. These factors will challenge the selection and reliability of measurement equipment and technology. At present, there is no reliable measurement method for soil forces in multiple directions when lightning current is grounded using pressure sensors. Therefore, pressure monitoring cannot measure extreme changes in soil pressure, and its monitoring accuracy is low. Therefore, it is impossible to timely maintain the tower pole according to the impact of soil pressure on the monitoring object such as the tower pole, resulting in safety risks. Summary of the invention

[0006] The technical problem to be solved by the present invention is that when a lightning current strikes a tower pole, the soil will be subjected to forces in multiple directions. Existing monitoring means have low precision and cannot perform multi-directional monitoring. The purpose is to provide a soil pressure monitoring method, equipment and medium when the impact current is dispersed. According to the situation when the lightning current is dispersed into the ground, the pressure of the soil at different points in the space is measured to obtain the pressure changes in multiple directions of the adjacent soil. By simultaneously measuring the forces in multiple directions, the monitoring accuracy is improved, and the soil pressure on the target detection tower pole in different directions can be more accurately evaluated, thereby reducing the risk of directly measuring the soil pressure changes when the lightning current is dispersed into the ground in actual scenarios, and predicting and improving the behavior of the soil under the impact of lightning voltage.

[0007] The present invention is achieved through the following technical solutions:

[0008] A first aspect of the present invention provides a soil pressure monitoring method when an impulse current is dissipated, comprising the following specific steps:

[0009] Obtain a vertical grounding electrode and a horizontal grounding electrode of the target detection tower, and construct a spatial rectangular coordinate system based on the vertical grounding electrode and the horizontal grounding electrode of the target detection tower;

[0010] Select pressure monitoring points based on the spatial rectangular coordinate system;

[0011] Acquire multi-point pressure monitoring data in multiple directions, and obtain the pressure of the soil on the target detection tower based on the multi-point pressure monitoring data.

[0012] Furthermore, the vertical grounding electrode and the horizontal grounding electrode of the target detection tower are used to construct a spatial rectangular coordinate system, which specifically includes:

[0013] Obtain the center point of the horizontal grounding pole of the target detection tower as the origin of the spatial rectangular coordinate system;

[0014] The coordinate axes of the space rectangular coordinate system are constructed according to the directions of the vertical grounding electrode and the horizontal grounding electrode.

[0015] Furthermore, the pressure monitoring point selection based on the spatial rectangular coordinate system specifically includes:

[0016] According to the directions of the vertical grounding electrode and the horizontal grounding electrode, the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis and the positive direction of the z-axis are obtained, and the pressure monitoring point is selected according to the direction of the coordinate axis.

[0017] Furthermore, the pressure monitoring point selection according to the coordinate axis direction specifically includes: selecting multiple pressure monitoring points in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis and the positive direction of the z-axis, wherein the distance between the multiple pressure monitoring points in each direction is k, and k is a distance threshold.

[0018] Further, each direction includes at least three pressure monitoring points;

[0019] The distances between the three pressure monitoring points and the center of the horizontal grounding electrode are marked as d1, d2, and d3, respectively.

[0020] Furthermore, the obtaining of multi-point pressure monitoring data in multiple directions specifically includes:

[0021] During the lightning discharge, soil pressure data of pressure monitoring points are collected at intervals of t. Each cycle lasts for T time, and t / T pressure data are obtained at each monitoring point.

[0022] Furthermore, obtaining the pressure of the soil on the target detection tower according to the multi-point pressure monitoring data specifically includes:

[0023] Obtain pressure monitoring data in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis;

[0024] According to the pressure monitoring data and point data, the relationship between the magnitude of force and the displacement of coordinate values ​​is calculated by interpolation method;

[0025] Based on the relationship between force and displacement, the pressure of the target detection tower at any point in the soil is determined.

[0026] Furthermore, the determining of the pressure of the target detection tower at any point in the soil specifically includes:

[0027]

[0028] Among them, F(m ±) is the magnitude of the force with direction on the coordinate axis; m ± The distance from any point in the xyz coordinate axis to the center of the sensor; d i is the location of the pressure monitoring point, i=1,2,…,n; F i 、F i+1 and F i+2 The pressure measured at the pressure monitoring point.

[0029] A second aspect of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a soil pressure monitoring method during impulse current dissipation is implemented.

[0030] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a soil pressure monitoring method when an impulse current is dissipated.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] Based on the above, the technical effects of the lightning grounding system can be summarized as follows:

[0033] According to the situation when lightning current disperses into the ground, the pressure of the soil at different points in the space is measured, and the pressure changes in multiple directions of the adjacent soil are obtained. By measuring the forces in multiple directions at the same time, the monitoring accuracy is improved, and the soil pressure on the target detection tower in different directions can be more accurately evaluated, thereby reducing the risk of directly measuring the soil pressure changes when lightning disperses into the ground in actual scenarios. Potential faults can be discovered in advance to avoid equipment damage due to lightning strikes or abnormal grounding systems. By accurately monitoring lightning impulses, real-time control of lightning strike events and the status of the grounding system can be achieved, thereby improving the lightning protection capability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 is a flow chart of soil pressure monitoring when impulse current is dispersed in an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of a method for measuring soil pressure changes when an impulse current is dissipated in an embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of the arrangement of soil pressure change sensors when the impulse current is dissipated in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0039] As a possible implementation, Figure 1 As shown, this embodiment provides a soil pressure monitoring method when impulse current is scattered, including the following specific steps: obtaining the vertical grounding electrode and the horizontal grounding electrode of the target detection tower, and constructing a spatial rectangular coordinate system based on the vertical grounding electrode and the horizontal grounding electrode of the target detection tower; selecting points for pressure monitoring based on the spatial rectangular coordinate system; obtaining multi-point pressure monitoring data in multiple directions, and obtaining the pressure of the soil on the target detection tower according to the multi-point pressure monitoring data. This embodiment measures the pressure of the soil at different points in space according to the situation when the lightning current is scattered into the ground, obtains the pressure changes in multiple directions of the adjacent soil, and improves the monitoring accuracy by simultaneously measuring the forces in multiple directions. It can more accurately evaluate the soil pressure on the target detection tower in different directions, thereby reducing the risk of directly measuring the soil pressure changes when lightning is scattered into the ground in actual scenarios, and can detect potential faults in advance to avoid equipment damage due to lightning strikes or abnormal grounding systems. By accurately monitoring lightning impulses, it is possible to achieve real-time control of lightning strike events and grounding system status, and improve the lightning protection capability of the power system.

[0040] In some possible implementations, a spatial rectangular coordinate system is constructed based on the vertical grounding electrode and the horizontal grounding electrode of the target detection tower, specifically including:

[0041] Obtain the center point of the horizontal grounding pole of the target detection tower as the origin of the spatial rectangular coordinate system;

[0042] The coordinate axes of the space rectangular coordinate system are constructed according to the directions of the vertical grounding electrode and the horizontal grounding electrode.

[0043] In some possible implementations, pressure monitoring point selection is performed based on a spatial rectangular coordinate system, specifically including:

[0044] According to the directions of the vertical grounding electrode and the horizontal grounding electrode, the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis and the positive direction of the z-axis are obtained, and the pressure monitoring point is selected according to the direction of the coordinate axis.

[0045] In some possible implementations, pressure monitoring points are selected according to the direction of the coordinate axis, specifically including: selecting multiple pressure monitoring points in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis, respectively, wherein the distance between the multiple pressure monitoring points in each direction is k, and k is a distance threshold.

[0046] In some possible implementations, obtaining multi-point pressure monitoring data in multiple directions specifically includes:

[0047] During the lightning discharge, soil pressure data of pressure monitoring points are collected at intervals of t. Each cycle lasts for T time, and t / T pressure data are obtained at each monitoring point.

[0048] In some possible implementations, obtaining the pressure of soil on the target detection tower according to the multi-point pressure monitoring data specifically includes:

[0049] Obtain pressure monitoring data in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis;

[0050] According to the pressure monitoring data and point data, the relationship between the magnitude of force and the displacement of coordinate values ​​is calculated by interpolation method;

[0051] Based on the relationship between force and displacement, the pressure of the target detection tower at any point in the soil is determined.

[0052] In some possible implementations, determining the pressure of a target detection tower at any point in the soil specifically includes:

[0053]

[0054] Among them, F(m ± ) is the magnitude of the force with direction on the coordinate axis; m ± The distance from any point in the xyz coordinate axis to the center of the sensor; d i is the location of the pressure monitoring point, i=1,2,…,n; F i 、F i+1 and F i+2 The pressure measured at the pressure monitoring point.

[0055] In some possible implementations, three high-frequency pressure sensors are buried in the positive direction of the x-axis, with the distances from the center of the horizontal grounding electrode being d1, d2, and d3 respectively. The relationship between the magnitude of the force in the x-axis direction and the displacement is calculated based on the magnitude and position of the force at three points in the positive direction of the x-axis. Similarly, the relationship between the magnitude of the force in the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis and the displacement can be obtained. Based on the forces of different magnitudes in the five directions, the resultant force at any point in the soil is calculated, thereby obtaining a pressure change curve at any point in the soil when lightning enters the ground.

[0056] In some possible implementations, this embodiment provides a pressure calculation process for burying three high-frequency pressure sensors along the positive direction of the x-axis. Each sensor has a different distance from the center of the horizontal grounding electrode, which is marked as d1, d2 and d3, respectively, to measure the magnitude of the force at different positions in the positive direction of the x-axis, which are marked as F1, F2 and F3, respectively. The expression of the force magnitude varying with the displacement in the positive direction of the x-axis is calculated using the interpolation method of numerical analysis:

[0057] F(x + )=F1+(F2-F1)(x + -d1) / (d2-d1)+(F3-F2)(x + -d2) / (d3-d2)

[0058] In the formula, F(x + ) is the magnitude of the force in the positive direction of the x-axis, N; x + is the distance from any point on the positive direction of the x-axis to the center of the sensor, m; d1, d2 and d3 are the locations of the sensors, m; F1, F2 and F3 are the magnitudes of the force measured by the sensors, N.

[0059] Based on the above calculation process, the relationship between the magnitude of the force in the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis and the displacement can be obtained by the same logic. - )、F(y + )、F(y - )、F(z + ).

[0060] According to F(x + )、F(x - )、F(y + )、F(y - ) and F(z + ), based on the principles of mechanics, the magnitude and direction of the pressure on a certain point can be calculated.

[0061] In some possible implementations, a high frequency pressure sensor and an oscilloscope constitute a soil pressure measurement system, such as Figure 2 and Figure 3As shown in the figure, the pressure measurement system mainly consists of x parts, namely the impulse current generator, the pressure sensor group and the signal acquisition and storage system. A spatial rectangular coordinate system is established with the grounding pole as the origin, and the pressure sensors are buried along the x, y and z axes respectively.

[0062] The impulse current of the grounding electrode is obtained by the impulse current generator. When the impulse current enters the ground, a large amount of energy is released and the soil pressure changes. After the pressure sensor in the soil detects the pressure change, the signal acquisition and storage system performs signal processing and analysis to obtain the pressure change curve. The scope of application of this embodiment includes monitoring the soil pressure near the vertical grounding electrode and the horizontal grounding electrode of the tower when lightning is grounded through the tower. The high-frequency pressure sensor will be installed in the soil. During the burial process, there should be soil pressure membrane protection measures. The high-frequency pressure sensor can measure the change of soil pressure in a very short time. The high-frequency pressure sensor is used to obtain multiple pressure measurement data. The high-frequency pressure sensor is connected to an oscilloscope. The oscilloscope is used to store the pressure change curve obtained by the high-frequency pressure sensor to ensure accurate measurement. During the lightning discharge, the sensor measures the soil pressure change every 1 microsecond. The whole measurement process lasts for 20 microseconds. In this way, 20 pressure data points will be obtained in this time window. The system draws a soil pressure change curve based on the 20 pressure data points. These data will help analyze the impact of lightning current on soil pressure, thereby providing an important basis for the design and optimization of lightning grounding systems.

[0063] In some possible implementations, this embodiment uses a high-frequency pressure sensor group, the sensing material is lead zirconate titanate, and the internal chip has a sampling frequency of 1 MHz. The pressure sensor measures the force change of the soil and converts it into a voltage signal. The voltage signal is transmitted to the oscilloscope through a connecting line for signal processing and analysis, thereby obtaining a pressure change curve.

[0064] In some possible implementations, the oscilloscope of this embodiment is a DS1000Z oscilloscope.

[0065] As a possible implementation, this embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, a soil pressure monitoring method when an impulse current is dispersed is implemented.

[0066] As a possible implementation, this embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a soil pressure monitoring method when an impulse current is dispersed is implemented.

[0067] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A soil pressure monitoring method when impulse current is dissipated, characterized in that: The specific steps include: Obtain a vertical grounding electrode and a horizontal grounding electrode of the target detection tower, and construct a spatial rectangular coordinate system based on the vertical grounding electrode and the horizontal grounding electrode of the target detection tower; Select pressure monitoring points based on the spatial rectangular coordinate system; Acquire multi-point pressure monitoring data in multiple directions, and obtain the pressure of the soil on the target detection tower based on the multi-point pressure monitoring data.

2. The soil pressure monitoring method when impulse current is dispersed according to claim 1, characterized in that: The vertical grounding electrode and the horizontal grounding electrode of the target detection tower are used to construct a spatial rectangular coordinate system, which specifically includes: Obtain the center point of the horizontal grounding pole of the target detection tower as the origin of the spatial rectangular coordinate system; The coordinate axes of the space rectangular coordinate system are constructed according to the directions of the vertical grounding electrode and the horizontal grounding electrode.

3. The soil pressure monitoring method during impulse current dissipation according to claim 1, characterized in that: The pressure monitoring point selection based on the spatial rectangular coordinate system specifically includes: According to the directions of the vertical grounding electrode and the horizontal grounding electrode, the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis and the positive direction of the z-axis are obtained, and the pressure monitoring point is selected according to the direction of the coordinate axis.

4. The soil pressure monitoring method during impulse current dissipation according to claim 1, characterized in that: The pressure monitoring point selection according to the coordinate axis direction specifically includes: selecting multiple pressure monitoring points in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis and the positive direction of the z-axis, wherein the distance between the multiple pressure monitoring points in each direction is k, and k is a distance threshold.

5. The soil pressure monitoring method when impulse current is dispersed according to claim 4, characterized in that: Each direction includes at least three pressure monitoring points; the distances between the three pressure monitoring points and the center of the horizontal grounding electrode are marked as d i d i+1 and d i+2 .

6. The soil pressure monitoring method when impulse current is dispersed according to claim 1, characterized in that: The obtaining of multi-point pressure monitoring data in multiple directions specifically includes: During the lightning discharge, soil pressure data of pressure monitoring points are collected at intervals of t. Each cycle lasts for T time, and t / T pressure data are obtained at each monitoring point.

7. The soil pressure monitoring method during impulse current dissipation according to claim 1, characterized in that: The step of obtaining the pressure of the soil on the target detection tower rod according to the multi-point pressure monitoring data specifically includes: Obtain pressure monitoring data in the positive direction of the x-axis, the negative direction of the x-axis, the positive direction of the y-axis, the negative direction of the y-axis, and the positive direction of the z-axis; According to the pressure monitoring data and point data, the relationship between the magnitude of force and the displacement of coordinate values ​​is calculated by interpolation method; Based on the relationship between force and displacement, the pressure of the target detection tower at any point in the soil is determined.

8. The soil pressure monitoring method during impulse current dissipation according to claim 7, characterized in that: Determining the pressure of the target detection tower at any point in the soil specifically includes: Among them, F(m ± ) is the magnitude of the force with direction on the coordinate axis; m ± The distance from any point in the xyz coordinate axis to the center of the sensor; d i is the location of the pressure monitoring point, i=1,2,…,n; F i 、F i+1 and F i+2 The pressure measured at the pressure monitoring point.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the soil pressure monitoring method during impulse current dissipation as described in any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the soil pressure monitoring method during impulse current dissipation as described in any one of claims 1 to 8 is implemented.

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