Method for testing contact performance difference between different grounding materials and soil

Abstract

The invention discloses a method for testing contact performance difference between different grounding materials and soil, and belongs to the technical field of grounding materials. The method provided by the invention covers multiple aspects of preparation of different grounding material samples, soil treatment, ion concentration change, pressure application, temperature gradient, comparison of different textures, long-term natural environment exposure and the like, comprehensively evaluates the contact performance of the grounding material and the soil, and realizes quantitative analysis of influence degrees of various factors; the action mechanism and the influence rule of specific factors such as ion concentration, dynamic pressure and temperature on the contact performance of the grounding material are deeply researched, so that the experimental result is more reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of grounding materials, and more specifically, particularly relates to a method for testing the difference in contact performance between different grounding materials and soil. Background Art

[0002] The contact performance between grounding materials and soil is crucial to the safe and stable operation of many systems, such as power systems, electronic equipment, etc. However, different grounding materials will show different performance when in contact with soil, and are affected by many factors.

[0003] At present, the research methods for the contact performance between grounding materials and soil are relatively limited, and there is a lack of a method that can comprehensively, systematically and accurately test and analyze the differences in the contact performance between different grounding materials and soil. In practical applications, it is often necessary to accurately understand the performance of grounding materials under different soil conditions in order to select appropriate grounding materials or make targeted improvements and optimizations.

[0004] For example, changes in ion concentration, dynamic pressure, temperature, and soil texture have significant effects on contact performance, but existing technologies often cannot effectively quantify and analyze the specific impact of these factors. At the same time, there is a lack of in-depth research and accurate evaluation methods for the attenuation law of grounding material contact performance in a long-term natural environment.

[0005] Therefore, there is an urgent need for an innovative testing method to deeply study the differences in the contact performance between different grounding materials and soil, which can comprehensively consider the influence of multiple factors and present and analyze the test results in a quantitative and accurate manner, thereby providing strong technical support for the research and development, application and improvement of grounding materials. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a method for testing the difference in contact performance between different grounding materials and soil, so as to comprehensively evaluate the contact performance between the grounding material and the soil.

[0007] The present invention adopts the following technical solution: a method for testing the difference in contact performance between different grounding materials and soil, which comprises the following steps:

[0008] Step A, selecting samples of different grounding materials;

[0009] Step B, burying each grounding material sample in the soil at the same depth;

[0010] Step C, connecting a measuring instrument to the grounding material sample, applying the same current and voltage, and measuring and recording corresponding resistance and conductivity parameters;

[0011] Step D, regularly measuring the resistance and conductivity parameters and observing their changes over time;

[0012] Step E, first measuring the initial performance value of the contact performance between the grounding material and the soil, changing the soil ion concentration by adding chemical reagents, then measuring the changed performance value of the contact performance between the grounding material and the soil under different soil ion concentrations, and calculating the contact performance change rate;

[0013] Step F, applying dynamic pressure to the contact portion between the grounding material sample and the soil, monitoring and recording the change in contact performance between the grounding material and the soil during the pressure change process, and analyzing the relationship between pressure and soil contact performance using the formula: pressure influence coefficient = contact performance change / pressure change, wherein the contact performance change is the difference in soil contact performance before and after the dynamic pressure is applied;

[0014] Step G, measuring the contact performance between the grounding material and the soil in different temperature gradient areas, and using the formula: temperature performance correlation = (variance of performance values ​​at different temperatures / average performance value) to measure the correlation degree of temperature on the contact performance;

[0015] Step H: Conduct comparative experiments on different soil textures and calculate the difference index of contact performance of grounding materials under soils of different textures;

[0016] Step I: Conduct a natural environment exposure experiment, regularly measure and record the contact performance between the grounding material and the soil, and use the formula: performance decay rate = (initial performance value - final performance value) / initial performance value × exposure time to analyze the performance decay law in the natural environment.

[0017] Preferably, the measuring instrument includes a resistance tester and a conductivity tester.

[0018] Preferably, in step D and step I, the time interval of the periodic measurement is a fixed value.

[0019] Preferably, the magnitude range of the dynamic pressure is [10N, 50N], and the frequency range is [1Hz, 10Hz].

[0020] Preferably, the temperature gradient region ranges from [10°C, 50°C].

[0021] Preferably, when constructing the temperature gradient region, a plurality of gradient intervals are set, and the temperature interval of each interval is 5°C.

[0022] Preferably, the contact performance change rate=(performance value after change-initial performance value) / initial performance value×100%.

[0023] Preferably, the resistance tester measures the resistance value of the contact portion between the grounding material and the soil, and the conductivity tester measures the conductivity value of the contact portion between the grounding material and the soil.

[0024] Preferably, the difference index=(the sum of the absolute values ​​of the contact performance differences of different textures / the sum of the total performance values)×100%.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention covers multiple aspects from sample preparation of different grounding materials to soil treatment, changes in ion concentration, pressure application, temperature gradient, comparison of different textures, and long-term exposure to natural environments, to comprehensively evaluate the contact performance between grounding materials and soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic flow chart of a method for testing the difference in contact performance between different grounding materials and soil according to the present invention. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] See also Figure 1 The present invention provides a method for testing the difference in contact performance between different grounding materials and soil, comprising the following steps:

[0030] 1) Prepare different grounding material samples to compare the performance differences of different grounding materials in subsequent experiments.

[0031] 2) Select soil samples and pre-treat them to ensure that the soil samples are typical and suitable, providing a basis for subsequent research on the interaction with grounding materials.

[0032] 3) Each grounding material sample is buried in the soil at the same depth to ensure the consistency of experimental conditions and facilitate comparative analysis.

[0033] 4) Connect the measuring instrument to the grounding material sample, apply a certain current or voltage, measure and record the corresponding parameters such as resistance and conductivity. This is the key step to directly obtain data related to the contact performance between the grounding material and the soil by connecting the measuring instrument to apply current or voltage and measure and record the parameters.

[0034] 5) Repeat the measurement of resistance and conductivity parameters regularly, observe their changes over time, and understand the dynamic change trend of contact performance over time.

[0035] 6) First measure the initial performance value of the contact performance between the grounding material and the soil; by adding chemical reagents, the ion concentration in the soil can be changed through processes such as ion exchange after dissolution, and then measure the changed performance values ​​of the contact performance between the grounding material sample and the soil under different soil ion concentrations, record the relevant data, and use the formula: contact performance change rate = (performance value after change - initial performance value) / initial performance value × 100% to evaluate the degree of influence of ion concentration changes on contact performance.

[0036] The chemical reagents are specifically divided into: if you want to increase the cation concentration in the soil, use a chemical reagent containing potassium ions (K + ) of potassium chloride (KCl), sodium ions (Na + ) containing sodium chloride (NaCl), etc. If you want to increase the concentration of anions in the soil, use nitrate ions (NO3 - ) of potassium nitrate (KNO3), etc.

[0037] 7) Apply dynamic pressures of different magnitudes and frequencies to the contact points between the grounding material sample and the soil, monitor and record the changes in the contact performance between the grounding material sample and the soil during the pressure change process, and use the formula: pressure influence coefficient = contact performance change / pressure change to analyze the relationship between pressure and soil contact performance, where the contact performance change is the difference in soil contact performance before and after the dynamic pressure is applied.

[0038] 8) Construct a temperature gradient environment, place the grounding material and soil in it, measure the contact performance in different temperature gradient areas, and use the formula: temperature-performance correlation = (variance of performance values ​​at different temperatures / average performance value) to measure the degree of correlation between temperature and contact performance.

[0039] 9) Conduct comparative experiments on different soil textures (such as sand, clay, etc.) and calculate the difference index of the contact performance of grounding materials under soils of different textures. The formula can be: Difference index = (sum of the absolute values ​​of the performance differences of different textures / sum of the total performance values) × 100%.

[0040] 10) Conduct long-term natural environment exposure experiments, measure and record the contact performance at regular intervals, and use the formula: performance decay rate = (initial performance value - final performance value) / initial performance value × exposure time to analyze the performance decay law under long-term natural conditions.

[0041] Using the formula contact performance change rate = (performance value after change - initial performance value) / initial performance value × 100% to evaluate the impact of ion concentration changes on contact performance can quantify the specific impact of ion concentration changes on the contact performance between grounding materials and soil, clarify the changes in contact performance under different ion concentration levels, and help to deeply understand the relationship between the factor of ion concentration and contact performance, provide a basis for optimizing grounding material design and soil environmental management, and more accurately evaluate and predict performance under different ion concentration conditions. This formula calculates the ratio of the difference in performance values ​​before and after the change to the initial performance value, and multiplies it by 100% to convert it into a percentage, thereby intuitively reflecting the relative change in contact performance caused by changes in ion concentration.

[0042] The relationship between pressure and contact performance is analyzed using the formula pressure influence coefficient = performance change / pressure change, where the performance change is the difference in performance before and after the dynamic pressure is applied. This intuitively quantifies the degree of influence of dynamic pressure changes on contact performance, clarifies the specific correlation between pressure and contact performance, and helps to conduct in-depth research on the mechanism of the dynamic pressure factor on the contact performance between grounding materials and soil. The performance of different grounding materials under pressure environments can be evaluated based on the pressure influence coefficient, providing a reference for material selection, etc., and is conducive to targeted design and improvement to adapt to different pressure conditions. The performance change refers to the difference in the contact performance between the grounding material and the soil before and after the dynamic pressure is applied, and the pressure change is the amplitude of the dynamic pressure change.

[0043] The formula temperature-performance correlation = (variance of performance values ​​at different temperatures / average performance value) is used to measure the correlation between temperature and contact performance. The degree of correlation between temperature and contact performance is clarified in a quantitative way, which helps to accurately understand the significance of the influence of temperature factors on contact performance, so as to better grasp the role of temperature. It provides specific data support and analysis basis for targeted consideration of the influence of temperature factors on the contact performance between grounding materials and soil, and can help optimize the design and experimental plan, such as determining the temperature range that needs to be focused on. Among them, the "variance of performance values ​​at different temperatures" reflects the degree of dispersion of performance values ​​at different temperatures, and the "average performance value" is the average of all performance values.

[0044] The difference index of the contact performance of grounding materials under soils of different textures is calculated using the following formula: Difference Index = (Sum of the absolute values ​​of the performance differences under different textures / Sum of the total performance values) × 100%, that is, first calculate the sum of the absolute values ​​of the performance differences under different textures, divide it by the sum of the total performance values, and finally multiply it by 100% to convert it into a percentage to express the difference index. This clearly quantifies the degree of difference in the impact of different soil textures on the contact performance of grounding materials, and can intuitively compare the performance differences caused by different soil textures, providing a basis for further analysis and optimization, helping to determine the adaptability and targeted improvement direction of grounding materials under different soil texture conditions, so that researchers can have a clearer understanding of the importance of soil texture factors.

[0045] The performance decay law under long-term natural conditions is analyzed using the formula performance decay rate = (initial performance value - final performance value) / initial performance value × exposure time, where "initial performance value" is the performance value at the beginning of the natural environment exposure experiment, "final performance value" is the performance value after a period of exposure, and "exposure time" is the length of time the entire experimental process lasts. It accurately quantifies the degree and speed of decay of the contact performance of the grounding material under long-term natural environment exposure, helps to gain a deeper understanding of the long-term stability and reliability of the grounding material in actual application scenarios, and can provide important data support for the selection, improvement and design of the grounding material, so as to develop products that are better able to adapt to the long-term natural environment, and facilitate the comparison and evaluation of the long-term performance of different grounding materials.

[0046] The measuring instruments include a resistance tester and a conductivity tester, which can simultaneously obtain two important parameters of the grounding material, resistance and conductivity. Resistance and conductivity are key indicators for measuring the contact performance between the grounding material and the soil. The use of a special resistance tester and conductivity tester can ensure the accuracy and reliability of the measurement, and fully understand the performance of the grounding material under the action of current and voltage, providing more abundant data for in-depth analysis and evaluation, helping to more accurately judge the performance of the grounding material, and providing a basis for further optimization and improvement.

[0047] The time interval of regular measurement is a fixed value to ensure the regularity and consistency of data collection, facilitate data analysis and comparison, and more clearly observe the trend and law of parameter changes over time, making the experimental results more comparable and reliable, and helping to timely discover abnormal situations and stage changes. The specific time interval value will be determined according to actual needs and experimental design. For example, measurements may be taken every other day, week, or month.

[0048] The dynamic pressure range is [10N, 50N], and the frequency range is [1Hz, 10Hz]. The specific range of pressure application is clarified, making the experiment operational and controllable. The changes in the contact performance between the grounding material and the soil within a specific pressure range can be systematically studied. By setting a reasonable range, a wider range of pressure conditions can be covered, thereby more comprehensively evaluating material performance and facilitating comparison and comprehensive analysis with other experimental conditions.

[0049] The temperature gradient range is [10℃, 50℃], which limits the temperature change interval and facilitates targeted experimental research. It can deeply explore how the contact performance between grounding materials and soil is affected by temperature within a specific temperature range, as well as the specific degree and law of this influence. It covers a certain temperature span and can better simulate the temperature changes that may be encountered in the actual environment. It is helpful to compare the performance differences under different temperature conditions and provide a basis for the application and optimization of grounding materials.

[0050] The present invention covers a wide range of aspects, from sample preparation of different grounding materials to soil treatment, changes in ion concentration, pressure application, temperature gradient, comparison of different textures, and long-term exposure to natural environments, to comprehensively evaluate the contact performance between grounding materials and soil;

[0051] Through multiple formulas such as contact performance change rate formula, pressure influence coefficient formula, temperature performance correlation formula, difference index formula and performance attenuation rate formula, quantitative analysis of the influence of various factors is achieved;

[0052] The mechanism and influence of specific factors such as ion concentration, dynamic pressure, temperature, etc. on the contact performance of grounding materials were studied in depth;

[0053] Use specialized measuring instruments such as resistance testers and conductivity testers to ensure measurement accuracy, and regular measurements at fixed time intervals to ensure the regularity and consistency of data collection, making the experimental results more reliable;

[0054] The specific range of dynamic pressure and temperature gradient is clarified to facilitate experimental operation and comparative analysis;

[0055] It provides a strong basis and guidance for the design, optimization, material selection and soil environmental management of grounding materials. Through various settings and measurements, the experimental results have good comparability, which is convenient for evaluating and comparing the performance under different conditions. It helps to understand the long-term stability and reliability of grounding materials in actual application scenarios and provide a reference for actual engineering applications.

[0056] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A method for testing the difference in contact performance between different grounding materials and soil, characterized in that: include: Select samples of different grounding materials; Each grounding material sample was buried in the soil at the same depth; Connect the measuring instrument to the grounded material sample, apply the same current and voltage, measure and record the corresponding resistance and conductivity parameters; Regularly measure the resistance and conductance parameters and observe their changes over time; First, measure the initial performance value of the contact performance between the grounding material and the soil, change the soil ion concentration by adding chemical reagents, then measure the changed performance value of the contact performance between the grounding material and the soil under different soil ion concentrations, and calculate the contact performance change rate; Apply dynamic pressure to the contact part between the grounding material sample and the soil, monitor and record the change of the contact performance between the grounding material and the soil during the pressure change process, and use the formula: pressure influence coefficient = contact performance change / pressure change to analyze the relationship between pressure and soil contact performance, where the contact performance change is the difference in soil contact performance before and after the dynamic pressure is applied; Measure the contact performance between the grounding material and the soil in different temperature gradient areas, and use the formula: temperature performance correlation = (variance of performance values ​​at different temperatures / average performance value) to measure the correlation degree of temperature on contact performance; Conduct comparative experiments on different soil textures and calculate the difference index of contact performance of grounding materials under soils of different textures; Conduct natural environment exposure experiments, regularly measure and record the contact performance between the grounding material and the soil, and use the formula: performance decay rate = (initial performance value - final performance value) / initial performance value × exposure time to analyze the performance decay law in the natural environment.

2. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: Measuring instruments include resistance testers and conductivity testers.

3. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: When the resistance and conductance parameters are measured periodically, the time interval of the periodic measurement is a fixed value.

4. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: When the contact performance between the grounding material and the soil is measured and recorded regularly, the time interval of the regular measurement is a fixed value.

5. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: The dynamic pressure range is [10N, 50N], and the frequency range is [1Hz, 10Hz].

6. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: The temperature gradient region ranges from [10℃, 50℃].

7. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: When constructing the temperature gradient region, multiple gradient intervals were set, and the temperature interval of each interval was 5°C.

8. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: Contact performance change rate = (performance value after change - initial performance value) / initial performance value × 100%.

9. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: The resistance tester measures the resistance value of the contact part between the grounding material and the soil, and the conductivity tester measures the conductivity value of the contact part between the grounding material and the soil.

10. A method for testing the difference in contact performance between different grounding materials and soil as claimed in claim 1, characterized in that: Difference index = (sum of absolute values ​​of contact performance differences of different textures / sum of total performance values) × 100%.

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