A direct current method instrument automatic testing method and system

Abstract

The present application relates to the technical field of electrical method tester testing, and discloses a direct current electrical method tester automatic testing method and system, comprising a apparent resistivity simulation module for simulating the resistivity variation of the earth layer; an automatic wiring simulation module for arranging a plurality of simulated electrode points according to the simulated resistivity variation of the earth layer; an information acquisition module for determining corresponding starting points and moving points according to the arranged plurality of simulated electrode points, then automatically running the electrodes, and collecting the electrode running information between the starting points and the moving points at each time of automatic electrode running through the direct current electrical method tester; the electrode running information includes the voltage value, the current value and the spontaneous potential between the electrodes; a judgment module for verifying the consistency of the collected voltage value, current value and spontaneous potential, and judging whether the corresponding data is correct; if correct, the direct current electrical method tester meets the requirements, otherwise it does not meet the requirements.

Description

Technical Field

[0001] This invention relates to the field of electrical resistivity testing technology, and specifically to an automatic testing method and system for a DC electrical resistivity instrument. Background Technology

[0002] Currently, both domestically and internationally, the prediction and forecasting of hidden geological hazards ahead of underground engineering construction (tunneling), coal mines, etc., mainly employs two methods: drilling and geophysical exploration. Geophysical exploration methods primarily include seismic wave exploration, electrical resistivity tomography (ERT), electromagnetic wave exploration, and acoustic wave exploration. ERT, in particular, is a set of exploration methods that use the differences in electrical conductivity between rocks and ores in the Earth's crust as a material basis, observing and studying the distribution patterns of artificially established underground current fields to find minerals and solve geological problems.

[0003] Existing DC resistivity transducers require performance testing before leaving the factory, which consists of laboratory testing and field trials. Laboratory testing primarily assesses parameters such as the programmable electrode switch and serial port signal peak values. Field trials require the installation of electrodes and cables, involve significant construction work, and struggle to maintain consistent field conditions. This makes quantitative analysis of test parameters difficult, hindering the comparison of the transducer's performance accuracy; only relative values ​​can be used to analyze equipment operating conditions.

[0004] Therefore, there is an urgent need for an automatic testing method and system for DC resistivity instruments that can solve the problems of high testing difficulty and low operational efficiency of existing DC resistivity instruments in field experiments. Summary of the Invention

[0005] The present invention aims to provide an automatic testing method and system for DC resistivity instruments, which can solve the problems of high testing difficulty and low operation efficiency of existing DC resistivity instruments in field experiments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic testing system for a DC resistivity meter, comprising:

[0007] The apparent resistivity simulation module is used to simulate the resistivity changes of the geoelectric layer.

[0008] The automatic wiring simulation module is used to arrange multiple simulated electrode points based on the simulated resistivity changes of the geoelectric layer.

[0009] The information acquisition module is used to determine the corresponding starting point and moving point based on the multiple simulated electrode points, and then perform automatic electrode running. The electrode running information between the starting point and the moving point is collected by a DC voltage transducer during each automatic electrode running. The electrode running information includes the voltage value, current value and natural potential between the electrodes.

[0010] The judgment module is used to verify the consistency of the collected voltage, current and natural potential values ​​and to determine whether the corresponding data is correct. If it is correct, the DC voltage meter is judged to meet the requirements; otherwise, it does not meet the requirements.

[0011] The principle and advantages of this scheme are as follows: First, the resistivity change of the geoelectric layer is simulated to reflect the actual resistivity change of the ground. Then, based on the simulated resistivity change of the geoelectric layer, multiple simulated electrode points are arranged to make the arranged simulated electrode points conform to the simulated geoelectric layer, thereby making subsequent detection or electrode running faster and more accurate.

[0012] Then, the starting point and moving point of the polarity running are determined, and automatic polarity running is performed. During the automatic polarity running process, the polarity running information is collected in real time by a DC resistivity meter. The accuracy of the information collected by the DC resistivity meter is verified based on the polarity running information. Only when the verification is passed can the corresponding data be considered correct. This proves that the DC resistivity meter used to collect polarity running information meets the requirements and is a qualified product.

[0013] In the existing technology, in order to test the performance of the manufactured DC resistivity meter and determine whether it can be put into use, the performance test of the DC resistivity meter is usually carried out through field tests. However, field tests usually require the arrangement of electrodes and cables, which involves a large amount of construction work. At the same time, the consistency of the corresponding test conditions cannot be guaranteed, which makes it difficult to quantify and analyze the test parameters. In other words, it is difficult to compare the accuracy of the test of the resistivity meter performance, and only relative values ​​can be used to analyze the equipment operating conditions.

[0014] This solution simulates the resistivity changes of the geoelectric layer and combines this with automatic pole-running technology to achieve a realistic simulation of field testing. This simulation allows for the creation of testing scenarios for the DC resistivity transducer (DCTR). By replacing the DCTR, performance testing of multiple transducers can be completed. The simulation ensures consistency of field test conditions, reducing the difficulty of analyzing the corresponding test parameters and making performance comparisons easier. Furthermore, the overall difficulty of field testing of the DCTR is reduced, enabling automated testing, minimizing the amount of field work, and significantly improving testing efficiency.

[0015] Preferably, as an improvement, a display module is also included for displaying the polarity information collected each time.

[0016] Beneficial effects: In this solution, the display module can more intuitively display the specific curves of the pole running information collected by each DC resistivity meter, realizing the visualization of the DC resistivity meter's collection status.

[0017] Preferably, as an improvement, it also includes an alarm module, which issues an alarm message if the judgment result indicates that the DC power meter does not meet the requirements.

[0018] Beneficial effects: In this solution, an alarm will be triggered if any DC voltage resistivity meter does not meet the requirements, so that operators can make timely judgments on the DC voltage resistivity meter and better classify the voltage resistivity meter.

[0019] Preferably, as an improvement, the simulated electrode points are provided with 32 points.

[0020] Beneficial effects: In this scheme, the number of simulated electrode points is set to 32, which not only meets the data acquisition requirements and ensures the performance testing requirements of the DC electrical resistivity meter, but also makes the data acquisition process more complex and diverse, thereby improving the accuracy of the test.

[0021] Preferably, as an improvement, the apparent resistivity simulation module includes:

[0022] The initial simulation module is used to collect the resistivity information of the clay and calculate the resistance value of each precision resistor based on the resistivity information of the clay.

[0023] The optimization module is used to numerically optimize the calculated resistance value, generate the corresponding final resistance value, and set the precision resistors according to the corresponding final resistance value to form a precision resistor combination that simulates the resistivity change of the geoelectric layer.

[0024] Beneficial effects: Optimizing the calculated resistance values ​​allows for faster and more precise resistance settings while meeting requirements as much as possible, thereby improving the realism and efficiency of resistivity simulation.

[0025] Preferably, as an improvement, the apparent resistivity simulation module includes three sets of precision resistor combinations with a temperature drift of less than 10 ppm.

[0026] Beneficial effects: Using three sets of precision resistors to better simulate the resistivity of the geoelectric layer greatly improves the realism and accuracy of the simulation.

[0027] Preferably, as an improvement, it also includes:

[0028] The statistics module is used to identify and classify the reasons why the DC resistivity meter does not meet the requirements when the judgment result is that the DC resistivity meter does not meet the requirements, and generate corresponding non-compliance reason information.

[0029] The analysis module is used to determine if there is a problem of improper operation by the tester when the non-compliance reason information is the same within a preset number of times. At this time, the data analysis is performed based on the non-compliance reason information to analyze the various situations corresponding to this situation and formulate corresponding solutions.

[0030] The transmission module is used to transmit the corresponding solution to the server.

[0031] Beneficial Effects: In this solution, the test results of each DC resistivity meter are statistically analyzed. Discrepancies may exist, and the causes are identified and statistically analyzed for each discrepancy, such as voltage values ​​being too high. If the causes of discrepancies are consistent across all DC resistivity meters within a preset number of tests, it indicates a potential problem with the meters themselves, the testing operation, or the module. To improve future testing, the causes of discrepancies are analyzed to determine the possible reasons for these discrepancies, and solutions are developed. Testers can then use these solutions to conduct checks during subsequent tests to prevent similar issues from recurring, thus significantly improving test accuracy.

[0032] Preferably, as an improvement, it also includes a data acquisition module for acquiring information on the personnel testing the DC resistivity meter and for acquiring information on the current working environment of the DC resistivity meter.

[0033] The dynamic adjustment module is used to dynamically adjust the preset number of tests based on the tester information and the working environment information.

[0034] Beneficial effects: In this solution, the preset number of tests is dynamically adjusted based on the tester information and the working environment information, which greatly improves the accuracy of the judgment.

[0035] This invention provides an automatic testing method for a DC resistivity meter, which applies the aforementioned automatic testing system for a DC resistivity meter. Attached Figure Description

[0036] Figure 1 This is a logic block diagram of the automatic testing system for DC power voltammetry in Embodiment 1 of the present invention.

[0037] Figure 2This is a graph showing the apparent resistivity of a certain ground surface in Embodiment 1 of the present invention.

[0038] Figure 3 This is a contour map of apparent resistivity obtained from ground inversion in Embodiment 1 of the present invention.

[0039] Figure 4 This is a hardware design diagram of the apparent resistivity simulation module in Embodiment 1 of the present invention.

[0040] Figure 5 This is a hardware design diagram of the automatic wiring simulation module in Embodiment 1 of the present invention. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] The basic implementation examples are as follows: Figure 1 As shown: An automatic testing system for a DC resistivity meter, comprising:

[0043] The apparent resistivity simulation module is used to simulate the resistivity changes of the geoelectric layer.

[0044] The apparent resistivity simulation module includes:

[0045] The initial simulation module is used to collect the resistivity information of the clay and calculate the resistance value of each precision resistor based on the resistivity information of the clay.

[0046] The optimization module is used to numerically optimize the calculated resistance value, generate the corresponding final resistance value, and set precision resistors based on the final resistance value to form a precision resistor combination that simulates the resistivity variation of the Earth's magnetic field. Three sets of precision resistor combinations are set, with a temperature drift of less than 10 ppm (0–40°C). In this embodiment, to achieve the corresponding function, the corresponding hardware circuit is developed, and the specific hardware circuit diagram is as follows. Figure 4 The technical requirements for this hardware circuit are: resistivity: 0.1Ω·m~10Ω·m; resistance accuracy: ≤1%; resistance power: ≤3W; temperature drift: 10ppm; operating voltage: 80VDC; operating current: ≤60mA.

[0047] In this embodiment, in order to make the resistivity simulation process more realistic, when collecting the resistivity of clay, considering that the degree of coupling between the electrode and the clay surface has a significant impact on the authenticity of the collected voltage signal, the contact area between the clay and the electrode is increased by compaction and water addition to improve the coupling degree between the electrode and the clay surface.

[0048] Of course, when selecting the electrode spacing at this time, a relatively moderate spacing will be chosen. For example, considering the maximum identifiable voltage signal, the electrode spacing can be smaller to improve the detection resolution. At the same time, when selecting the side line length, it will be controlled within the minimum signal range of the instrument's timer to avoid background noise interfering with the authenticity of the acquired signal.

[0049] Of course, after data collection, it is necessary to compare the results with the corresponding standard geoelectric model to determine which standard geoelectric model best matches the resistivity characteristics of the clay. In subsequent resistivity variation simulations, the simulated resistivity changes must also conform to the regularity of the corresponding standard geoelectric model. For example, taking a low-resistivity conductive sphere as an example, when a low-resistivity conductive sphere exists underground, symmetrical four-level detection on the ground should produce an apparent resistivity curve that approximates the following characteristics: Figure 2 As shown; while the inverted apparent resistivity contour map approximates the following characteristics, such as Figure 3 As shown;

[0050] An automatic wiring simulation module is used to arrange multiple simulated electrode points based on the simulated resistivity changes of the geothermal layer. There are 32 simulated electrode points. In this embodiment, the automatic wiring simulation module uses a shift register to control the 32 simulated electrode points to achieve automatic combination and switching. To implement this automatic wiring simulation function, corresponding hardware circuitry is also designed in this embodiment, as shown in the specific design diagram. Figure 5 As shown, its specific technical requirements are: operating voltage: 12V DC, operating current: ≤200mA; analog electrode access points: 32; access points can be automatically combined and switched; it has a communication interface.

[0051] The information acquisition module is used to determine the corresponding starting point and moving point based on multiple simulated electrode points, and then perform automatic electrode running. A DC resistivity transducer is used to collect electrode running information between the starting point and the moving point during each automatic electrode running. This electrode running information includes the voltage value, current value, and natural potential between the electrodes. In this embodiment, the electrode running information is used to calculate the corresponding resistance value, and the calculated resistance value is used to determine whether it exceeds the theoretical range, thereby judging the validity of the data. Simultaneously, to test the quality of the DC resistivity transducer, voltage difference measurement can be performed to generate a corresponding voltage difference curve. For example, the acquired voltage signal curve shows a quadratic decreasing trend with respect to the measurement point position; even with the influence of natural potential and instrument noise, the overall change in potential difference still approximates a quadratic decreasing trend.

[0052] The judgment module is used to verify the consistency of the collected voltage, current and natural potential values ​​and to determine whether the corresponding data is correct. If it is correct, the DC voltage meter is judged to meet the requirements; otherwise, it does not meet the requirements.

[0053] The display module is used to display the electrode running information collected each time. In this embodiment, in order to better display the data, after the DC power meter completes the electrode running, the data measured each time will be visualized, such as the corresponding resistance curve, current value, etc.

[0054] The alarm module is used to issue an alarm message when the DC voltage resistivity meter fails to meet the requirements. To better alert the testing personnel, an alarm will be triggered when a non-compliant DC voltage resistivity meter is detected. The alarm method includes a dual alarm of warning light and buzzer, which greatly improves the timeliness of alarm communication.

[0055] Also includes:

[0056] The statistics module is used to identify and classify the reasons why the DC resistivity meter does not meet the requirements when the judgment result is that the DC resistivity meter does not meet the requirements, and generate corresponding non-compliance reason information.

[0057] The analysis module is used to determine if there is a problem of improper operation by the tester when the non-compliance reason information is the same within a preset number of times. At this time, the data analysis is performed based on the non-compliance reason information to analyze the various situations corresponding to this situation and formulate corresponding solutions.

[0058] The transmission module is used to transmit the corresponding solutions to the server. In this embodiment, to facilitate better testing, each DC resistivity meter identifies and categorizes the reasons for non-compliance after testing. For example, if the resistance value calculated from the data obtained by a DC resistivity meter does not meet the requirements (i.e., exceeds the theoretical range), the reasons for non-compliance are analyzed to determine whether it is caused by current, voltage, or other factors. This method allows for the sequential determination of the causes of non-compliance in the DC resistivity meter. If all the corresponding resistivity meters fail within a preset number of tests and the corresponding reasons for non-compliance are consistent, a further assessment is required. This situation may indicate improper operation by the tester or a genuine problem with the resistivity meter. To further determine the cause, the data is analyzed to identify multiple possible reasons for the situation and solutions are developed. This allows the tester to compare and review the solutions one by one to ensure successful testing in the future.

[0059] The data acquisition module is used to acquire information about the personnel testing the DC resistivity meter, as well as information about the current working environment of the DC resistivity meter.

[0060] The dynamic adjustment module is used to dynamically adjust the preset number of predictions based on tester information and work environment information. In this embodiment, the number of predictions is dynamically adjusted according to tester information and work environment information. This makes the prediction test more realistic. For example, testers have different levels of proficiency, so the requirements for them are also different, making the subsequent judgment results more consistent with reality.

[0061] This embodiment also provides an automatic testing method for a DC resistivity meter, which applies the aforementioned automatic testing system for a DC resistivity meter.

[0062] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic testing system for a DC resistivity meter, characterized in that: include: The apparent resistivity simulation module is used to simulate the resistivity changes of the geoelectric layer. The automatic wiring simulation module is used to arrange multiple simulated electrode points based on the simulated resistivity changes of the geoelectric layer. The information acquisition module is used to determine the corresponding starting point and moving point based on the multiple simulated electrode points, and then perform automatic electrode running. The electrode running information between the starting point and the moving point is collected by a DC voltage transducer during each automatic electrode running. The electrode running information includes the voltage value, current value and natural potential between the electrodes. The judgment module is used to verify the consistency of the collected voltage values, current values, and natural potential, and to determine whether the corresponding data is correct. If correct, the DC current resistivity meter is deemed to meet the requirements; otherwise, it does not meet the requirements. The statistics module is used to identify and classify the reasons why the DC resistivity meter does not meet the requirements when the judgment result is that the DC resistivity meter does not meet the requirements, and generate corresponding non-compliance reason information. The analysis module is used to determine if there is a problem of improper operation by the tester when the non-compliance reason information is the same within a preset number of times. At this time, the data analysis is performed based on the non-compliance reason information to analyze the various situations corresponding to this situation and formulate corresponding solutions. The transmission module is used to transmit the corresponding solution to the server; The data acquisition module is used to acquire information about the personnel testing the DC resistivity meter, as well as information about the current working environment of the DC resistivity meter. The dynamic adjustment module is used to dynamically adjust the preset number of tests based on the tester information and the working environment information. The apparent resistivity simulation module includes three sets of precision resistor combinations with a temperature drift of less than 10 ppm; the apparent resistivity simulation module also includes: The initial simulation module is used to collect the resistivity information of the clay and calculate the resistance value of each precision resistor based on the resistivity information of the clay. The optimization module is used to numerically optimize the calculated resistance value, generate the corresponding final resistance value, and set the precision resistors according to the corresponding final resistance value to form a precision resistor combination that simulates the resistivity change of the geoelectric layer.

2. The automatic testing system for a DC resistivity meter according to claim 1, characterized in that: It also includes a display module for displaying the polarity information collected each time.

3. The automatic testing system for a DC resistivity meter according to claim 2, characterized in that: It also includes an alarm module, which issues an alarm message if the judgment result indicates that the DC power meter does not meet the requirements.

4. The automatic testing system for a DC resistivity meter according to claim 3, characterized in that: There are 32 simulated electrode points.

5. An automatic testing method for a DC resistivity meter, characterized in that: An automatic testing system for DC resistivity meter as described in any one of claims 1-4.

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