Positioning method applied to test positioning of grounding resistance tester

Abstract

The invention relates to the technical field of building lightning protection device detection, and provides a positioning method applied to test positioning of a grounding resistance tester. Inputting necessary positioning conditions into the resistance tester, and determining a test electrode corresponding to the necessary positioning conditions; positioning instruments are installed on the voltage polar pile, the current polar pile and the test pole; installing a positioning receiver on the grounding resistance tester, and obtaining the position data of the voltage polar pile, the current polar pile and the test pole; determining the position of a test point, combining the position data with the position data to generate a positioning test shaft, and generating a closed test curve on the positioning test shaft; according to the closed test curve, the position relation between the voltage polar pile and the closed curve is judged; when the voltage polar pile is on the closed test curve, the positioning position is correct; when the voltage polar pile is in the closed test curve, an error exists in the positioning position; and when the voltage polar pile is outside the closed test curve, the positioning position has an error, and the positioning position is wrong.

Description

Technical Field

[0001] The invention relates to the technical field of building (structure) lightning protection device detection, and in particular to a positioning method applied to ground resistance tester test positioning. Background Art

[0002] The grounding resistance is the ratio of the grounding potential U to I when the current I flows into the earth through the grounding body. Therefore, in order to measure the grounding resistance, a certain current is first injected into the grounding body, which requires setting up a current electrode that can provide a current loop and measuring the current with an ammeter. In order to measure the potential of the grounding electrode with a voltmeter, it is necessary to set up a voltage electrode that can measure the potential at the infinite zero plane, such as Figure 2 shown.

[0003] There are two main forms of potential drop method used in daily ground resistance detection: straight line method and trigonometric method, both of which are special forms. The straight line method is θ=0°, and the trigonometric method is θ=29° (the straight line method is a special case of trigonometric method. In trigonometric measurement, it is generally stipulated that the lengths of the voltage electrode and the current electrode leads are equal, and the angle between the two is 29°, so that the true value of the ground resistance can be measured. At this time, the measured value is equal to the true value.

[0004] However, the existing technology has certain technical defects, such as:

[0005] All are done manually by inspectors. Every grounding body (object) that needs to be tested for "grounding resistance value" requires the inspectors to wire and test the test instrument in accordance with the requirements of "GB T21431-2023 Appendix E Grounding Resistance Measurement Annex 2". However, due to the uncertainty of the inspection personnel's operation and the simplification of the inspection method by the standard and the lack of specific agreement on the arrangement of the voltage pole and current pole positions (all within a certain range of proportions, see Appendix E), errors may occur.

[0006] The measurement results of the same measured point may be different due to different testers.

[0007] According to the current traditional (standard) ground resistance tester method, there is a large error between the measured value and the actual value of the measured point.

[0008] The linear three-level method cannot meet all the requirements of the testing site:

[0009] At the same time, taking into account the actual situation at the detection site, after finding the grounding device (test point) of the inspected building, the equipment is wired according to the site conditions and suitable current electrodes and voltage electrodes are found for testing. However, due to on-site environmental problems, there are problems such as: there is no suitable location for arranging current electrodes and voltage electrodes nearby (non-backfill soil is required), or the current electrode location is determined but the corresponding voltage electrode location cannot be arranged (such as concrete floors, roads, underground pipelines, etc.). Summary of the invention

[0010] The invention proposes a positioning method applied to the test positioning of a ground resistance tester, which is used to solve the problems that intelligent arrangement cannot be realized in the prior art and random arrangement in a complex environment can be solved.

[0011] The present invention provides a positioning method for testing and positioning a ground resistance tester, comprising:

[0012] Inputting the necessary positioning conditions into the ground resistance tester in advance, and determining the test electrodes corresponding to the necessary positioning conditions; wherein the test electrodes include a voltage pole pile, a current pole pile and a test pole;

[0013] Install locators on voltage pole piles, current pole piles and test poles;

[0014] Install a positioning receiver on the ground resistance tester to obtain the position data of the voltage pole pile, the current pole pile and the test pole;

[0015] Determine the test point position, combine the test point position with the position data, generate a positioning test axis, and generate a closed test curve on the positioning test axis;

[0016] According to the closed test curve, determine the positional relationship between the voltage pole and the closed curve;

[0017] Among them, when the voltage pole is on the closed test curve, it means that the positioning position is correct;

[0018] When the voltage pole is inside the closed test curve, it means that there is an error in the positioning position;

[0019] When the voltage pole stake is outside the closed test curve, it means that there is an error in the positioning position and the positioning position is wrong.

[0020] Furthermore, the necessary positioning conditions are input into the communication control terminal, and the communication control terminal is connected to the resistance tester.

[0021] Furthermore, a test indicator light is arranged on the voltage pole; wherein the test indicator light displays a corresponding indication color based on the positional relationship between the voltage pole pole and the closed curve.

[0022] Furthermore, when the positioning receiver is installed on the ground resistance tester, it also includes:

[0023] The signal strengths of the voltage pole pile, the current pole pile and the test pole are obtained respectively, and the operation parameters of the voltage pole pile, the current pole pile and the locator on the test pole are determined;

[0024] According to the signal intensity and the operating parameters, an operating compensation model fitted with the signal intensity is constructed;

[0025] According to the operation compensation model, the signal strengths of the voltage pole, current pole and test pole are synchronously compared to determine whether there is a signal strength deviation;

[0026] According to the signal strength deviation, adjust the real-time operating parameters of the corresponding locator.

[0027] Furthermore, when the positioning receiver is installed on the ground resistance tester, it also includes:

[0028] Pre-set the test gradient table to collect the original test signals under different test voltages;

[0029] Decompose the original test signal in time and frequency to generate time-frequency components;

[0030] Feature extraction is performed on the time-frequency components under different gradient values ​​to determine the time domain features and frequency domain features;

[0031] Input the time domain characteristics and frequency domain characteristics into a preset signal optimization model to determine a smoothing factor;

[0032] According to the smoothing factor, the original test signal under different gradient values ​​is gain optimized to determine the target test signal set;

[0033] Compare the stability of signal characteristics of different test signals in the target test signal set, and determine the target test gradient with the highest stability;

[0034] According to the target test gradient, the corresponding optimal test parameters are determined.

[0035] Furthermore, before generating the closed test curve on the positioning test axis, the method further includes:

[0036] Obtain environmental data of the test area; wherein the environmental data includes soil type, soil moisture, soil temperature, and electromagnetic interference;

[0037] According to the environmental data, determine the loss function corresponding to different environmental data and build an environmental simulation model;

[0038] The environmental simulation model and the positioning test axis are integrated to generate a positioning test model.

[0039] Furthermore, before fusing the environment simulation model and the positioning test axis, the method further includes:

[0040] Determine the soil conductivity heterogeneity based on the environmental simulation model and the contact area of ​​the soil in the test electrode insertion area;

[0041] Based on the preset conductivity matching network, a conductivity configuration model is established for the test electrode;

[0042] Based on the conductivity configuration model, a soil simulator is used to simulate the interaction between soil and test electrodes, and the conductivity simulation flux is calculated.

[0043] Based on the conductivity simulated flux, the conductive medium between the test electrode and the soil in the current area is determined.

[0044] Furthermore, the voltage pole, current pole and test pole are all equipped with positioning response components;

[0045] Wherein, the positioning response component includes a signal responder, a distance responder and a contact surface responder;

[0046] When the positioning receiver on the ground resistance tester receives the response signals of the signal responder, the distance responder and the contact surface responder respectively, the test is started and a closed test curve is generated.

[0047] Furthermore, a first signal channel is configured between the ground resistance tester and the voltage pole, a second signal channel is configured between the ground resistance tester and the current pole, and a third signal channel is configured between the ground resistance tester and the test pole;

[0048] Wherein, the ground resistance tester is used to mix the position data in the first signal channel, the second signal channel and the third signal channel;

[0049] When the signals are mixed, the phase-locked loop configured in the resistance tester is used to determine whether there is a signal phase deviation and adjust the signal phase.

[0050] Furthermore, the signal mixing further includes:

[0051] Obtaining the signal amplitude after signal mixing and comparing it with the expected amplitude; wherein, when the deviation between the signal amplitude and the expected amplitude is within a preset deviation threshold interval, the signal mixing is distortion-free; and when the deviation between the signal amplitude and the expected amplitude is not within the preset deviation threshold interval, the signal mixing is distorted;

[0052] Frequency compensation is performed through a preset equalizer according to the distortion deviation value of the signal mixing distortion; wherein the preset equalizer is pre-configured in the ground resistance tester.

[0053] The beneficial effects of the present invention are:

[0054] The present invention determines the test point position more accurately and improves the accuracy of the ground resistance test by accurately locating the positions of the voltage pole pile, the current pole pile and the test pole. The pre-input of the necessary positioning conditions and the automated positioning process reduce human judgment and operation errors, and improve the reliability of the test. By generating the positioning test axis and the closed test curve, the tester can intuitively see the positional relationship of the test electrodes. The positioning receiver can obtain the electrode position data in real time, so that the tester can immediately judge whether the positioning is accurate and adjust the electrode position in time. The system can automatically judge whether the positioning is correct based on the positional relationship between the voltage pole pile and the closed test curve, without manual judgment, thereby improving the test efficiency. It can also distinguish different positioning error situations (the voltage pole pile is inside or outside the closed curve), which helps the tester to quickly identify and correct positioning errors.

[0055] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0056] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0058] In the attached picture:

[0059] Figure 1 A method flow chart of a positioning method applied to test positioning of a ground resistance tester in an embodiment of the present invention;

[0060] Figure 2 It is an electrode arrangement diagram of a ground resistance meter in an embodiment of the present invention;

[0061] Figure 3 A formal diagram of the necessary conditions for positioning in an embodiment of the present invention;

[0062] Figure 4 Graph showing the movement trajectory of the voltage pole point P in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0064] The present invention proposes a positioning method for testing and positioning a ground resistance tester. The specific steps include:

[0065] Inputting the necessary positioning conditions into the ground resistance tester in advance, and determining the test electrodes corresponding to the necessary positioning conditions; wherein the test electrodes include a voltage pole pile, a current pole pile and a test pole;

[0066] Install locators on voltage pole piles, current pole piles and test poles;

[0067] Install a positioning receiver on the ground resistance tester to obtain the position data of the voltage pole pile, the current pole pile and the test pole;

[0068] Determine the test point position, combine the test point position with the position data, generate a positioning test axis, and generate a closed test curve on the positioning test axis;

[0069] According to the closed test curve, determine the positional relationship between the voltage pole and the closed curve;

[0070] Among them, when the voltage pole is on the closed test curve, it means that the positioning position is correct;

[0071] When the voltage pole is inside the closed test curve, it means that there is an error in the positioning position;

[0072] When the voltage pole stake is outside the closed test curve, it means that there is an error in the positioning position and the positioning position is wrong.

[0073] The technical principle of the above technical solution is:

[0074] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention is a method for quickly and conveniently arranging a test voltage pole pile (P), a current pole pile (C) and a tested point (E) during a ground resistance detection process, and can also more accurately measure the ground resistance value.

[0075] The ground resistance tester of the present invention breaks through the traditional ground resistance detection method. It does not need to measure only according to the two special cases of the traditional straight line method and the trigonometric method, but can arrange the curves after the combination of these methods at will. Through the present invention, the ground resistance detector can be applied to more complex detection environments (such as backfill soil, cement ground, underground metal pipes, etc. around the detection point), and can also adjust the position of the test voltage pole pile (P) at will according to the on-site situation, without the need to replace all three points.

[0076] The intelligent arrangement of grounding piles is realized, which greatly improves the efficiency and accuracy of grounding detection.

[0077] The method adopted in the present invention is mainly the potential drop method. The grounding resistance value is the most important parameter of a grounding system. There are many measurement methods. Currently, the potential drop method is mainly used. However, in actual potential drop method measurement, determining the position of the potential pole compensation point is difficult.

[0078] In the actual implementation process, the present invention embeds a processing chip on the ground resistance tester and loads the necessary positioning conditions.

[0079] The formula for positioning the necessary conditions is:

[0080]

[0081] That is, as long as the distances between the three electrodes E, P and C satisfy the above formula, the measured resistance value is equal to the actual grounding resistance value. The above formula is called the necessary condition for correctly measuring the grounding resistance value.

[0082] And customize (install locator, etc.) voltage pole pile (P), current pole pile (C) and test E (clip for clamping the position of the measured point, E) point, so that when the 3-point position is arranged, the ground resistance tester can read the position values ​​(xx meters) of dEC, dEP, and dCP at any time.

[0083] At the same time, signal indicators (or other indicators) are customized on the voltage pole (P) and current pole (C). After determining the position of the measured point (E) and the current pole C, the voltage pole (P) Figure 2 When on the blue closed curve, the indicator light shows green (indicating that it is in the correct position for the test);

[0084] If the voltage pole (P) is inside this closed curve, the indicator light will be (yellow), and the instrument will display the measured value, which will be greater than the true value;

[0085] If the voltage pole (P) is outside the closed curve, the indicator light will be on (yellow), and the instrument will display the measured value, which will be slightly lower than the true value.

[0086] On the curve: measured value = true value.

[0087] Inside the curve: measured value > true value. According to the specification requirements, if the measured value needs to be less than the standard requirement, the true value must be less than the standard requirement. The qualified judgment is not affected. Only the test value has an error, so a yellow mark (warning) is given.

[0088] Outside the curve: measured value < true value. According to the specification requirements, if the measured value is less than the standard requirement, there is a situation where the measured value is less than the standard requirement (the test inspector will judge it as "meeting the requirements") but the true value is greater than the standard requirement (actually "not meeting the requirements"). At this time, not only the test value has errors, but the test conclusion may also be wrong, so a red mark (warning) is given;

[0089] Purpose: Testers do not need to use the traditional fixed three-pole straight line method to find the position of the voltage pole pile (P) with a ruler, but can directly follow the signal light indication (the color can quickly determine the required position of point P) in a complex on-site testing environment to arbitrarily select an effective voltage pole pile (P) position (i.e. the indicator light shows green).

[0090] This invention greatly simplifies the process of arranging voltage pole piles (P) and current pole piles (C) during ground resistance detection (no need to use a distance measuring instrument to arrange them). After ensuring the length of dEC, it is only necessary to arrange them according to the indicator light of the voltage pole pile (P). The efficiency of the detection personnel in the ground resistance test is greatly improved. At the same time, because the point arrangement is carried out according to the requirements of formula (7), the detection result of the ground resistance value is more accurate.

[0091] The beneficial effects of the present invention are:

[0092] The present invention determines the test point position more accurately and improves the accuracy of the ground resistance test by accurately locating the positions of the voltage pole pile, the current pole pile and the test pole. The pre-input of the necessary positioning conditions and the automated positioning process reduce human judgment and operation errors, and improve the reliability of the test. By generating the positioning test axis and the closed test curve, the tester can intuitively see the positional relationship of the test electrodes. The positioning receiver can obtain the electrode position data in real time, so that the tester can immediately judge whether the positioning is accurate and adjust the electrode position in time. The system can automatically judge whether the positioning is correct based on the positional relationship between the voltage pole pile and the closed test curve, without manual judgment, thereby improving the test efficiency. It can also distinguish different positioning error situations (the voltage pole pile is inside or outside the closed curve), which helps the tester to quickly identify and correct positioning errors.

[0093] As an embodiment of the present invention: the necessary positioning conditions are input into a communication control terminal, and the communication control terminal is connected to a resistance tester.

[0094] In the actual implementation process, the communication control terminal includes but is not limited to: an embedded chip, a communication component or a communication device, which can be connected to the resistance tester.

[0095] As an embodiment of the present invention: a test indicator light is arranged on the voltage pole; wherein the test indicator light displays a corresponding indication color based on the positional relationship between the voltage pole pole and the closed curve.

[0096] In the actual implementation process, the ground resistance tester needs to determine the position of the voltage pole when testing the ground resistance. The voltage pole is the point where the test voltage is applied in the ground resistance test. The test indicator light is configured on the voltage pole, and the displayed color can be changed according to the positional relationship between the voltage pole and the preset closed curve (usually the safety boundary of the test area). When the voltage pole is located inside the closed curve or at a specific position, the test indicator light displays one color; when the voltage pole is located outside the closed curve or at another specific position, it displays another color.

[0097] As an embodiment of the present invention: when the positioning receiver is installed on the ground resistance tester, it also includes:

[0098] The signal strengths of the voltage pole pile, the current pole pile and the test pole are obtained respectively, and the operation parameters of the voltage pole pile, the current pole pile and the locator on the test pole are determined;

[0099] According to the signal intensity and the operating parameters, an operating compensation model fitted with the signal intensity is constructed;

[0100] According to the operation compensation model, the signal strengths of the voltage pole, current pole and test pole are synchronously compared to determine whether there is a signal strength deviation;

[0101] According to the signal strength deviation, adjust the real-time operating parameters of the corresponding locator.

[0102] In the actual implementation process, the ground resistance tester needs to accurately locate the positions of the voltage pole pile, current pole pile and test pole during the test, and then obtain its operating parameters based on the position data. The position data determines the signal strength to a certain extent.

[0103] A positioning receiver is installed on the ground resistance tester to receive positioning signals from the voltage pole pile, current pole pile and test pole. The signal strength of these three poles and the operating parameters of the locator are obtained respectively. The operating parameters include signal transmission delay, signal attenuation, etc. The operating compensation model is constructed using the acquired signal strength and operating parameters. The operating compensation model is used to fit the relationship between signal strength and the operating status of the locator. By comparing the signal strength of the voltage pole pile, current pole pile and test pole, it is determined whether there is a signal strength deviation. The strength deviation may be caused by environmental factors or problems with the equipment itself. If a signal strength deviation is detected, the real-time operating parameters of the ground resistance locator are adjusted to compensate for the deviation and ensure the accuracy of positioning.

[0104] As an embodiment of the present invention: when the positioning receiver is installed on the ground resistance tester, it also includes:

[0105] Pre-set the test gradient table to collect the original test signals under different test voltages;

[0106] Decompose the original test signal in time and frequency to generate time-frequency components;

[0107] Feature extraction is performed on the time-frequency components under different gradient values ​​to determine the time domain features and frequency domain features;

[0108] Input the time domain characteristics and frequency domain characteristics into a preset signal optimization model to determine a smoothing factor;

[0109] According to the smoothing factor, the original test signal under different gradient values ​​is gain optimized to determine the target test signal set;

[0110] Compare the stability of signal characteristics of different test signals in the target test signal set, and determine the target test gradient with the highest stability;

[0111] According to the target test gradient, the corresponding optimal test parameters are determined.

[0112] In the actual implementation process, a test gradient table is pre-set to optimize the test signal. First, a test gradient table is established, which includes test parameters under different test voltages.

[0113] In the implementation process, the original test signal is collected during the ground resistance test, and the original test signal under different test voltages is collected. Time-frequency decomposition is to decompose the collected original test signal in time and frequency to obtain time-frequency components, analyze the signal characteristics more carefully, and then extract signal features. Feature extraction is to extract features from time-frequency components, and determine the time domain features and frequency domain features respectively. The time domain features and frequency domain features can reflect the essential characteristics of the signal.

[0114] Then the signal is processed by the signal optimization model, that is, the extracted time domain features and frequency domain features are input into the preset signal optimization model, and the smoothing factor is determined by the signal optimization model, and the smoothing factor is used to optimize the signal processing process.

[0115] In this process, gain optimization is to optimize the gain of the original test signal according to the smoothing factor to reduce noise and enhance signal quality, thereby determining the target test signal set. Stability comparison is to compare the stability of different test signals in the target test signal set and select the target test gradient with the highest stability. The best test parameters are determined according to the target test gradient with the highest stability, and are used for accurate testing of ground resistance.

[0116] As an embodiment of the present invention: before generating a closed test curve on the positioning test axis, the method further includes:

[0117] Obtain environmental data of the test area; wherein the environmental data includes soil type, soil moisture, soil temperature, and electromagnetic interference;

[0118] According to the environmental data, determine the loss function corresponding to different environmental data and build an environmental simulation model;

[0119] The environmental simulation model and the positioning test axis are integrated to generate a positioning test model.

[0120] In the actual implementation process, to obtain the environmental data of the test area, the environmental information of the test area is first collected before the ground resistance test. This information includes soil type, soil moisture, soil temperature, electromagnetic interference, etc. These factors may affect the test results of the ground resistance.

[0121] Then, the loss function is determined, which is to determine a loss function for each environmental factor based on the collected environmental data. The loss function is used to quantify the impact of the environmental factor on the test signal.

[0122] To build an environmental simulation model, a certain loss function is used to establish an environmental simulation model, which can simulate the signal loss of ground resistance test under different environmental conditions. Finally, the environmental simulation model and the positioning test axis are integrated: the environmental simulation model is combined with the data of the positioning test axis to generate a comprehensive positioning test model. The positioning test model can take into account the impact of actual environmental factors on the test results, and then suppress or compensate for the interference caused by actual environmental factors when outputting the test results.

[0123] As an embodiment of the present invention: before fusing the environment simulation model and the positioning test axis, the method further includes:

[0124] Determine the soil conductivity heterogeneity based on the environmental simulation model and the contact area of ​​the soil in the test electrode insertion area;

[0125] Based on the preset conductivity matching network, a conductivity configuration model is established for the test electrode;

[0126] Based on the conductivity configuration model, a soil simulator is used to simulate the interaction between soil and test electrodes, and the conductivity simulation flux is calculated.

[0127] Based on the conductivity simulated flux, the conductive medium between the test electrode and the soil in the current area is determined.

[0128] In the actual implementation process, the non-uniformity of soil conductivity is determined by analyzing the environmental simulation model and the contact area of ​​the soil in the test electrode insertion area to evaluate the spatial distribution characteristics of soil conductivity. Because of the differences in soil composition, humidity, structure and other factors in the actual environment, its conductivity will vary at different locations. Through this step, the difference in conductivity can be determined, and then the conductive state of the soil can be determined.

[0129] Then, a conductivity configuration model is established. In this process, in order to enable the test electrode to obtain accurate measurement results in a simulated environment, it is necessary to establish a conductivity configuration model for the test electrode through a preset conductivity matching network based on the unevenness of soil conductivity. The conductivity configuration model can reflect the parameters affecting the electrode performance due to the spatial variation of soil conductivity.

[0130] Finally, the conductivity simulation flux is calculated. In actual implementation, a soil simulator is used to simulate the interaction between the soil and the test electrode according to the conductivity configuration model. Through simulation, the conductivity simulation flux can be calculated. This flux is a physical quantity that describes the flow of current in the soil, and then the optimal conductive medium is determined, that is, according to the calculated conductivity simulation flux, the conductive medium characteristics between the test electrode and the soil are determined, the electrochemical reaction and current transmission mechanism between the electrode and the soil are determined, and the most suitable conductive medium is determined and arranged around the polar pile.

[0131] As an embodiment of the present invention: the voltage pole, the current pole and the test pole are all equipped with a positioning response component;

[0132] Wherein, the positioning response component includes a signal responder, a distance responder and a contact surface responder;

[0133] When the positioning receiver on the ground resistance tester receives the response signals of the signal responder, the distance responder and the contact surface responder respectively, the test is started and a closed test curve is generated.

[0134] In the implementation process of the present invention, the positioning response components are configured, and the positioning response components are installed on the voltage pole pile, the current pole pile and the test pole respectively. These components include a signal responder, a distance responder and a contact surface responder. The signal responder is used to send or reflect the positioning signal so that the positioning receiver can determine the position of the pole pile. The distance responder is used to measure the distance between the positioning receiver and the pole pile to ensure the accuracy of the test. The contact surface responder is used to detect the state of the contact surface between the pole pile and the soil to ensure good contact, thereby ensuring the accuracy of the test results. The test is started, when the positioning receiver on the ground resistance tester receives the response signal from the signal responder, the distance responder and the contact surface responder, the system confirms that all the pole piles have been correctly placed and are ready for testing, and then starts the test process. Generate a closed test curve, after the test is started, the system generates a closed test curve according to the received positioning information, and the curve is used to guide the test process and data analysis.

[0135] As an embodiment of the present invention: a first signal channel is configured between the ground resistance tester and the voltage pole, a second signal channel is configured between the ground resistance tester and the current pole, and a third signal channel is configured between the ground resistance tester and the test pole;

[0136] Wherein, the ground resistance tester is used to mix the position data in the first signal channel, the second signal channel and the third signal channel;

[0137] When the signals are mixed, the phase-locked loop configured in the resistance tester is used to determine whether there is a signal phase deviation and to adjust the signal phase.

[0138] In the actual implementation process, by configuring the signal channel, that is, the ground resistance tester and the voltage pole, current pole and test pole are respectively configured with independent signal channels (first, second and third signal channels) for transmitting position data. Signal mixing means that the ground resistance tester mixes the position data from the three signal channels, so that the position information from different poles can be processed and analyzed at the same time. The phase-locked loop (PLL) is configured inside the ground resistance tester. This is a circuit for detecting and tracking the signal phase, which can determine whether there is a phase deviation after signal mixing. Signal phase adjustment means that if the phase-locked loop detects a signal phase deviation, the ground resistance tester will make corresponding signal phase adjustments to ensure signal synchronization and test accuracy.

[0139] As an embodiment of the present invention: the signal mixing further includes:

[0140] Obtaining the signal amplitude after signal mixing and comparing it with the expected amplitude; wherein, when the deviation between the signal amplitude and the expected amplitude is within a preset deviation threshold interval, the signal mixing is distortion-free; and when the deviation between the signal amplitude and the expected amplitude is not within the preset deviation threshold interval, the signal mixing is distorted;

[0141] Frequency compensation is performed through a preset equalizer according to the distortion deviation value of the signal mixing distortion; wherein the preset equalizer is pre-configured in the ground resistance tester.

[0142] In actual implementation,

[0143] After the signals are mixed, the amplitude value of the signal is obtained through an amplitude detection circuit or algorithm and compared with the expected ideal amplitude value. If the deviation between the signal amplitude and the expected amplitude is within the preset deviation threshold range, the signal mixing is considered to be distortion-free; if the deviation exceeds the threshold range, it is considered to be distorted. When distortion is detected, the system adjusts the parameters of the preset equalizer according to the distortion deviation value to perform frequency compensation. The equalizer can adjust the gain for specific frequency components to compensate for the amplitude and phase distortion introduced during the signal mixing process. The preset equalizer can compensate for the frequency response unevenness in the signal path by adjusting the gain and phase of different frequency components of the signal, thereby reducing amplitude distortion.

[0144] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A positioning method for testing and positioning a ground resistance tester, characterized in that: include: Inputting the necessary positioning conditions into the ground resistance tester in advance, and determining the test electrodes corresponding to the necessary positioning conditions; wherein the test electrodes include a voltage pole pile, a current pole pile and a test pole; Install locators on voltage pole piles, current pole piles and test poles; Install a positioning receiver on the ground resistance tester to obtain the position data of the voltage pole pile, the current pole pile and the test pole; Acquire the test point position, and combine the test point position with the position data to generate a positioning test axis, and generate a closed test curve on the positioning test axis; According to the closed test curve, determine the positional relationship between the voltage pole and the closed curve; Among them, when the voltage pole is on the closed test curve, it means that the positioning position is correct; When the voltage pole is inside the closed test curve, it means that there is an error in the positioning position; When the voltage pole stake is outside the closed test curve, it means that there is an error in the positioning position and the positioning position is wrong.

2. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: The necessary positioning conditions are input into the communication control terminal, and the communication control terminal is connected to the resistance tester.

3. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: The voltage pole is provided with a test indicator light, wherein the test indicator light displays a corresponding indication color based on the positional relationship between the voltage pole and the closed curve.

4. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: When the positioning receiver is installed on the ground resistance tester, it also includes: The signal strengths of the voltage pole pile, the current pole pile and the test pole are obtained respectively, and the operation parameters of the voltage pole pile, the current pole pile and the locator on the test pole are determined; According to the signal intensity and the operating parameters, an operating compensation model fitted with the signal intensity is constructed; According to the operation compensation model, the signal strengths of the voltage pole, current pole and test pole are synchronously compared to determine whether there is a signal strength deviation; According to the signal strength deviation, adjust the real-time operating parameters of the corresponding locator.

5. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: When the positioning receiver is installed on the ground resistance tester, it also includes: Pre-set the test gradient table to collect the original test signals under different test voltages; Decompose the original test signal in time and frequency to generate time-frequency components; Feature extraction is performed on the time-frequency components under different gradient values ​​to determine the time domain features and frequency domain features; Input the time domain characteristics and frequency domain characteristics into a preset signal optimization model to determine a smoothing factor; According to the smoothing factor, the original test signal under different gradient values ​​is gain optimized to determine the target test signal set; Compare the stability of signal characteristics of different test signals in the target test signal set, and determine the target test gradient with the highest stability; According to the target test gradient, the corresponding optimal test parameters are determined.

6. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: Before generating a closed test curve on the positioning test axis, the method further includes: Obtain environmental data of the test area; wherein the environmental data includes soil type, soil moisture, soil temperature, and electromagnetic interference; According to the environmental data, determine the loss function corresponding to different environmental data and build an environmental simulation model; The environmental simulation model and the positioning test axis are integrated to generate a positioning test model.

7. A positioning method for testing and positioning a ground resistance tester as claimed in claim 6, characterized in that: Before fusing the environment simulation model and the positioning test axis, the method further includes: Determine the soil conductivity heterogeneity based on the environmental simulation model and the contact area of ​​the soil in the test electrode insertion area; Based on the preset conductivity matching network, a conductivity configuration model is established for the test electrode; Based on the conductivity configuration model, a soil simulator is used to simulate the interaction between soil and test electrodes, and the conductivity simulation flux is calculated. Based on the conductivity simulated flux, the conductive medium between the test electrode and the soil in the current area is determined.

8. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: The voltage pole, current pole and test pole are all equipped with positioning response components; Wherein, the positioning response component includes a signal responder, a distance responder and a contact surface responder; When the positioning receiver on the ground resistance tester receives the response signals of the signal responder, the distance responder and the contact surface responder respectively, the test is started and a closed test curve is generated.

9. A positioning method for testing and positioning a ground resistance tester as claimed in claim 1, characterized in that: A first signal channel is configured between the ground resistance tester and the voltage pole, a second signal channel is configured between the ground resistance tester and the current pole, and a third signal channel is configured between the ground resistance tester and the test pole; Wherein, the ground resistance tester is used to mix the position data in the first signal channel, the second signal channel and the third signal channel; When the signals are mixed, the phase-locked loop configured in the resistance tester is used to determine whether there is a signal phase deviation and to adjust the signal phase.

10. A positioning method for testing and positioning a ground resistance tester according to claim 9, characterized in that: The signal mixing further includes: Obtaining the signal amplitude after signal mixing and comparing it with the expected amplitude; wherein, when the deviation between the signal amplitude and the expected amplitude is within a preset deviation threshold interval, the signal mixing is distortion-free; and when the deviation between the signal amplitude and the expected amplitude is not within the preset deviation threshold interval, the signal mixing is distorted; Frequency compensation is performed through a preset equalizer according to the distortion deviation value of the signal mixing distortion; wherein the preset equalizer is pre-configured in the ground resistance tester.

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