Testing device for exploring polarization potential of electrode through electromagnetic method

Abstract

The invention relates to the technical field of electromagnetic method exploration electrode polarization potential, in particular to an electromagnetic method exploration electrode polarization potential testing device which comprises a base and an electrode and further comprises a sample box, a first lifting block and a protection assembly. Two elastic air bags are arranged in the first lifting block, the protection assembly comprises a fixed protection frame fixedly installed at the bottom of the first lifting block, and the fixed protection frame is slidably connected with a movable protection frame. The movable protection frame and the fixed protection frame are matched to completely wrap the electrode and the detection probe, the surface of the electrode is prevented from being damaged, contamination and damage of impurities to the probe are effectively prevented, it is ensured that the electrode and the probe can stably work for a long time, the elastic air bag provides uniform and adjustable clamping force, it is ensured that the electrode is kept stable in the testing process, and the testing efficiency is improved. The electrode is prevented from moving or deflecting due to external force or soil change, the clamping mode is soft, and damage to the electrode is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic exploration electrode polarization potential, and in particular to a test device for electromagnetic exploration electrode polarization potential. Background Art

[0002] A test device for electromagnetic exploration electrode polarization potential is a device used to detect its electromagnetic characteristics and analyze the composition and structure of soil or underground substances through the interaction between electromagnetic waves and soil or underground media. Such devices usually incorporate electrodes, sensors, and an electronic control system, and can provide accurate polarization potential data and electromagnetic response characteristics of soil / underground substances during actual exploration.

[0003] Currently, the electrodes and probes of the existing test devices are usually directly exposed to the external environment. In places with heavy soil or moisture, they are prone to being eroded by air, moisture, chemical substances, salts, etc. Corrosion or oxidation will cause the surface quality of the electrodes to decline, thereby affecting their electrical performance, resulting in measurement errors or inability to work properly. The exposed electrodes and probes are prone to accumulating impurities, which will make the test data inaccurate and affect the reliability of the test results. In addition, when clamping the electrodes and inserting them into the soil, excessive clamping is likely to cause damage to the electrodes, and unstable clamping is likely to cause the electrodes to shift during insertion, directly affecting the contact quality between the electrodes and the soil, resulting in potential measurement deviation and reducing the accuracy and precision of the measurement, thus making the practicality of the device poor. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of poor practicality of the existing devices, and to propose a test device for electromagnetic exploration electrode polarization potential.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A test device for electromagnetic exploration electrode polarization potential, including a base and an electrode, further comprising: A sample box, which is rotatably connected to the top of the base. A top cover is provided on the top of the sample box, and a detection hole and a soil sampling hole are provided on the top of the top cover; A first lifting block, which is installed on the top of the top cover through a lifting assembly. The first lifting block corresponds to the detection hole. A clamping hole is provided through the top of the first lifting block for clamping the electrode. Two elastic air bags are provided inside the first lifting block, and the two elastic air bags are symmetrically distributed on both sides of the clamping hole; Protective component, the protective component includes a fixed protective frame fixedly installed at the bottom of the first lifting block, the fixed protective frame corresponds to the clamping hole, the fixed protective frame is slidably connected with a movable protective frame, the fixed protective frame and the movable protective frame form a tubular structure in combination, and the tubular structure is sleeved on the outer wall of the electrode. Detection probe groups are respectively arranged on both sides of the fixed protective frame close to the movable protective frame, and a telescopic component is arranged on the first lifting block.

[0006] Preferably, a partition frame is arranged inside the sample box, the partition frame is used to divide the inside of the sample box into multiple regions with the same size and shape, and different textures of soil are respectively filled in the multiple regions. A plurality of electromagnetic receivers are arranged at the bottom of the sample box, and the plurality of electromagnetic receivers respectively correspond to the multiple regions.

[0007] Preferably, the detection hole and the soil sampling hole are at the same distance from the center of the top cover. A second guide rail frame is fixedly installed on the top of the top cover through bolts, the second guide rail frame corresponds to the soil sampling hole, a second lifting block is slidably connected to the second guide rail frame, a second lead screw is rotatably connected to the inner wall of the second guide rail frame, the second lead screw penetrates through the second lifting block and is threadedly connected to the second lifting block.

[0008] Preferably, it further includes a drilling mechanism. The drilling mechanism includes a servo motor fixedly installed inside the second lifting block, and the output end of the servo motor is fixedly connected with a soil sampling blade. The soil sampling blade is located below the second lifting block, the soil sampling blade corresponds to the soil sampling hole, and a soil discharge groove is arranged on the top of the top cover. The soil discharge groove is located on one side of the soil sampling hole away from the center of the top cover and is communicated with the soil sampling hole.

[0009] Preferably, a first guide rail frame is fixedly installed on the top of the top cover through bolts, the first guide rail frame corresponds to the detection hole, the first lifting block is slidably connected to the first guide rail frame, a first lead screw is rotatably connected to the inner wall of the first guide rail frame, the first lead screw penetrates through the first lifting block and is threadedly connected to the first lifting block.

[0010] Preferably, two relief grooves are arranged inside the first lifting block, the two relief grooves are symmetrically distributed on both sides of the clamping hole, two notched gears are respectively slidably connected inside the two relief grooves, and two elastic air bags are respectively fixedly installed on one side of the two notched gears close to each other.

[0011] Preferably, two driving gears are rotatably connected inside the first lifting block, the two driving gears are symmetrically distributed on both sides of the two notched gears, and the driving gears are meshed with the corresponding notched gears on each side. Steering engines are respectively arranged at the bottoms of the two driving gears and are fixedly connected to the output ends of the steering engines.

[0012] Preferably, the interior of the elastic airbag is filled with a thermally expandable gas. A heating component is provided on the first lifting block, and the heating component is used to heat the thermally expandable gas in the elastic airbag. The heating component includes electric heating plates fixedly installed on two notched gears, and the electric heating plates are in contact with the corresponding elastic airbags.

[0013] Preferably, the telescopic component is used to drive the movable protective frame to move up and down. The telescopic component includes two electric push rods fixedly installed on the top of the first lifting block. The two electric push rods are symmetrically distributed on both sides of the clamping hole. The tops of the two electric push rods are respectively fixedly connected to a driving frame, and the bottom of the driving frame is fixedly connected to the top of the movable protective frame.

[0014] Preferably, four support frames are fixedly installed on the top of the base. The four support frames are circumferentially arrayed around the sample box, and the side wall of the top cover is fixedly connected to the support frames.

[0015] Compared with the prior art, the advantages of the present invention are as follows: By providing devices such as a movable protective frame and a fixed protective frame, in the non-detection state, the movable protective frame and the fixed protective frame cooperate to completely wrap the electrode and the detection probe, avoiding the surface of the electrode being contaminated, corroded or damaged by the soil, significantly reducing the wear of the electrode, effectively preventing the contamination and damage of the probe by dust, dirt, moisture, etc., ensuring that the probe can work stably for a long time. Through multi-parameter monitoring, more comprehensive and accurate soil information is obtained, improving the accuracy of electromagnetic exploration. By observing the numerical changes of the probe group and the electromagnetic reception signal at the bottom of the sample box, the sensitivity differences at various positions around the electrode are analyzed to determine whether there are probe defects or faults. By monitoring the working state of the probe in a timely manner, effective fault diagnosis is carried out, reducing the downtime of the equipment and ensuring the reliability and long-term stability of the system.

[0016] By providing devices such as an elastic airbag and a notched gear, the interior of the elastic airbag is filled with a thermally expandable gas. The electric heating plate heats to make the elastic airbag expand, thereby providing a uniform and adjustable clamping force to ensure that the electrode remains stable during the test and is not easily loosened. It is softer than the traditional mechanical clamping method, reducing the damage to the electrode. The stable clamping can ensure that the electrode is in a fixed position and direction when inserted into the soil, avoiding the movement or deflection of the electrode due to external forces or soil changes. The electrode is inserted into the soil in a stable state, which can ensure that the measured potential response is more consistent with the soil characteristics, reducing the influence of external interference on the results, avoiding errors during the insertion process, and ensuring that the electrode reaches the predetermined depth and position.

[0017] By arranging a servo motor to drive the gear to rotate, the present invention can precisely control the rotation of the notched gear, thereby driving the electrode to make precise angular adjustments. The precise rotation of the electrode can avoid measurement errors caused by position deviations. When performing the test of the polarization potential of the electrode, it ensures the stability of the electromagnetic field and the reliability of the test data. In addition, the notched gear that holds the electrode can also ensure the stable operation of the electrode under different soil conditions, enhancing the operability and measurement consistency of the device.

[0018] By arranging devices such as soil sampling blades and the second lifting block, the present invention uses the soil sampling blades to drill the soil sample in the sample box, and the soil finally discharges from the soil discharge groove as a sample, so as to detect the geology of the soil sample in the separated area, facilitate the distinction of soils in different areas, and is beneficial to the subsequent distinction of polarization potential detection. The extraction of the sample soil makes the degree of compression of the surrounding soil small when the subsequent electrode is inserted into the soil, and the polarization potential is more representative, avoiding excessive compression from changing the soil state, so as to more accurately reflect the actual characteristics of the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 2 is a schematic diagram of the structure of another perspective of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 3 is a schematic diagram of the structure of the top cover of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 4 is a schematic diagram of the internal structure of the sample box of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 5 is a schematic diagram of the structure of the first guide rail frame of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 6 is a schematic diagram of the structure of a part of the first lifting block of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 7 is a schematic diagram of the internal structure of the first lifting block of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 8 is a schematic diagram of the structure of the notched gear part of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 9 is a schematic diagram of the semi-section axonometric structure of the fixed protective shell of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention; Figure 10This is a schematic structural diagram of the second guide rail frame part of a test device for the polarization potential of an electromagnetic exploration electrode proposed by the present invention.

[0020] In the figure: 1 base, 101 support frame, 2 sample box, 201 partition frame, 3 top cover, 301 detection hole, 302 soil sampling hole, 4 soil discharge groove, 5 first guide rail frame, 501 first lead screw, 6 second guide rail frame, 601 second lead screw, 7 first lifting block, 701 clamping hole, 8 second lifting block, 9 soil sampling blade, 10 fixed protection frame, 11 detection probe group, 12 moving protection frame, 13 drive frame, 14 electric push rod, 15 drive gear, 16 notched gear, 161 relief groove, 17 elastic airbag. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Referring to Figures 1 to 10 , a test device for the polarization potential of an electromagnetic exploration electrode includes a base 1 and an electrode. A sample box 2 is rotatably connected to the top of the base 1. A drive motor (not shown in the figure) for driving the rotation of the sample box 2 is arranged inside the base 1. A partition frame 201 is arranged inside the sample box 2. The partition frame 201 is used to divide the inside of the sample box 2 into multiple regions with the same size and shape. Different textures of soil are filled in each of the multiple regions to simulate the different responses of different types of soil to electromagnetic signals, so as to provide diverse experimental data, which helps to analyze the influence of different soil types on the polarization potential of the electrode. Four support frames 101 are fixedly installed on the top of the base 1. The four support frames 101 are circumferentially arranged around the sample box 2. The top cover 3 is rotatably connected to the top of the sample box 2. The side wall of the top cover 3 is fixedly connected to the support frame 101, ensuring the stability of the sample box 2 and avoiding interference from external factors on the test. A detection hole 301 and a soil sampling hole 302 penetrate through the top of the top cover 3. The distances from the detection hole 301 and the soil sampling hole 302 to the center of the circle of the top cover 3 are the same. A soil discharge groove 4 is arranged on the top of the top cover 3. The soil discharge groove 4 is located on the side of the soil sampling hole 302 away from the center of the circle of the top cover 3 and is communicated with the soil sampling hole 302. A plurality of electromagnetic receivers are arranged at the bottom of the sample box 2. The plurality of electromagnetic receivers respectively correspond to the plurality of regions, and can accurately measure the change of the polarization potential of the electrode in each region, which helps to deeply understand the relationship between the spatial distribution of electromagnetic signals and soil properties. The partition frame 201 can isolate the magnetic field interference between soils and avoid the influence of magnetic field cross-action. As an electrical conductor, the physical properties of soil will affect the propagation of electromagnetic fields. Through this design, the accuracy of test data can be ensured, and the error caused by magnetic field interference can be prevented.

[0023] A second guide rail frame 6 is fixedly installed on the top of the top cover 3 through bolts. The second guide rail frame 6 corresponds to the soil sampling hole 302. A second lifting block 8 is slidably connected to the second guide rail frame 6. A second lead screw 601 is rotatably connected to the inner wall of the second guide rail frame 6. The second lead screw 601 is longitudinally arranged. The second lead screw 601 penetrates through the second lifting block 8 and is threadedly connected to the second lifting block 8. A motor (not shown in the figure) for driving the second lead screw 601 to rotate is arranged inside the second guide rail frame 6. A servo motor (not shown in the figure) is fixedly installed inside the second lifting block 8. The output end of the servo motor is fixedly connected to a soil sampling blade 9. The soil sampling blade 9 is located below the second lifting block 8. The soil sampling blade 9 corresponds to the soil sampling hole 302. The aperture of the soil sampling hole 302 is larger than the width of the soil sampling blade 9. The soil sampling blade 9 can pass through the soil sampling hole 302. When the second lead screw 601 rotates, the second lifting block 8 drives the soil sampling blade 9 to move downward. At the same time, the soil sampling blade 9 rotates under the action of the servo motor. The soil sampling blade 9 performs drilling work. The diameter of the hole drilled by the soil sampling blade 9 is adapted to the diameter of the electrode, so that when the electrode is inserted, it is in full contact with the soil sample. When the soil sampling blade 9 drills, the soil sample inside the sample box 2 is transported upward and discharged from the soil discharge groove 4. The discharged soil sample can be used for the detection of basic properties, which is convenient for distinguishing different soils and is beneficial to the subsequent distinction of polarization potential detection. Moreover, the extraction of the sample soil makes the degree of compression of the surrounding soil smaller after the electrode is inserted into the soil, and the polarization potential is more representative. After the drilling is completed, the sample box 2 is rotated so that the drilled hole is aligned with the detection hole 301.

[0024] A first guide rail frame 5 is fixedly installed on the top of the top cover 3 through bolts. The first guide rail frame 5 corresponds to the detection hole 301. A first lifting block 7 is slidably connected to the first guide rail frame 5. A first lead screw 501 is rotatably connected to the inner wall of the first guide rail frame 5. The first lead screw 501 is vertically arranged. The first lead screw 501 penetrates through the first lifting block 7 and is threadedly connected to the first lifting block 7. A motor (not shown in the figure) for driving the first lead screw 501 to rotate is arranged inside the first guide rail frame 5. A clamping hole 701 is arranged through the top of the first lifting block 7. The clamping hole 701 is used for clamping the electrode. Two relief grooves 161 are arranged inside the first lifting block 7. The two relief grooves 161 are symmetrically distributed on both sides of the clamping hole 701. Two notched gears 16 are respectively slidably connected inside the two relief grooves 161. Two driving gears 15 are rotatably connected inside the first lifting block 7. The two driving gears 15 are symmetrically distributed on both sides of the two notched gears 16. And the driving gears 15 are meshed with the corresponding notched gears 16 on the corresponding side. Servos are respectively arranged at the bottoms of the two driving gears 15 and are fixedly connected to the output ends of the servos. Elastic air bags 17 are respectively arranged on the sides of the two notched gears 16 close to each other. The elastic air bags 17 are filled with thermally expandable gas. Electric heating plates are respectively fixedly installed inside the two notched gears 16 and are in contact with the corresponding elastic air bags 17. The electric heating plates heat to make the elastic air bags 17 expand. The electrode penetrates through the clamping hole 701 from top to bottom. The two elastic air bags 17 expand to clamp the electrode. By controlling the rotation of the driving gears 15 by the servos, the notched gears 16 and the elastic air bags 17 can be driven to drive the electrode to rotate, and the angle of the electrode can be adjusted. By controlling the rotation of the first lead screw 501, the first lifting block 7 can drive the electrode to pass through the detection hole 301 and enter the hole drilled by the soil sampling blade 9.

[0025] Through the expansion of the two elastic air bags 17, the electrode can be accurately clamped. The elastic air bags 17 are filled with thermally expandable gas. When the electric heating plates heat, the elastic air bags 17 expand, providing a uniform and adjustable clamping force, ensuring that the electrode remains stable during the test, not easy to loosen, preventing measurement errors caused by insufficient clamping, being softer than the traditional mechanical clamping method, reducing damage to the electrode. The addition of the electric heating plates ensures that the expansion of the air bags is controllable. By controlling the temperature of the electric heating plates, the expansion degree of the air bags can be controlled, further improving the stability of the clamping process and ensuring that the electrode always maintains a stable clamping state during the test. By driving the rotation of the driving gears 15 by the servos, the rotation of the notched gears 16 can be accurately controlled, thereby driving the electrode to adjust the angle. The angle adjustment is a very important part in electromagnetic exploration because electrodes at different angles will affect the measurement accuracy and data reliability. Flexibly adjusting the angle of the electrode helps to ensure that the electrode can adapt to different soil conditions and exploration requirements, further improving the measurement accuracy.

[0026] A fixed protective frame 10 is fixedly connected to the bottom of the first lifting block 7. The fixed protective frame 10 corresponds to the clamping hole 701. A movable protective frame 12 is slidably connected to the fixed protective frame 10. The fixed protective frame 10 and the movable protective frame 12 are combined to form a tubular structure. The tubular structure is sleeved on the outer wall of the electrode to ensure that the electrode will not be in direct contact with the soil in the non-detection state, avoiding damage or contamination of the electrode, and reducing the measurement error caused by the soil covering or corroding the surface of the electrode. On both sides of the fixed protective frame 10 close to the movable protective frame 12, a detection probe group 11 is respectively arranged. When the detection work is not carried out, the movable protective frame 12 shields and protects the detection probe group 11, avoiding the direct contact of the probe with the external environment when not in use, reducing the damage to the probe caused by dust, dirt, moisture, etc., and thus significantly extending the service life of the probe. The detection probe group 11 is composed of a variety of different sensors, and can detect the soil conductivity, dielectric constant, magnetic susceptibility, humidity, temperature, salt content, etc. at the position where the electrode contacts the soil. This multi-parameter monitoring greatly improves the accuracy of electromagnetic exploration, ensuring accurate measurement under different soil conditions. Two electric push rods 14 are fixedly installed at the top of the first lifting block 7. The two electric push rods 14 are symmetrically distributed on both sides of the clamping hole 701. The tops of the two electric push rods 14 are respectively fixedly connected to a driving frame 13. The bottom of the driving frame 13 is fixedly connected to the top of the movable protective frame 12. When detection is required, the electric push rod 14 controls the driving frame 13 to drive the movable protective frame 12 to move upward, so that the detection probe group 11 on the fixed protective frame 10 is exposed, and the electrode contacts the soil at the same time. During the detection, the notched gear 16 that clamps the electrode is precisely rotated to achieve the precise rotation of the electrode, ensuring that the electrode maintains an accurate position and angle in the soil, thereby improving the measurement accuracy. Observe the numerical changes of the detection probe group 11 and the magnitude of the electromagnetic reception signal at the bottom of the sample box 2, and analyze the sensitivity of each position around the electrode. The sensitivity differences at different positions can help identify whether there are defects or faults in the probe, facilitating timely troubleshooting of problems.

[0027] In the present invention, the sample box 2 is rotatably connected to the base 1 and is controlled to rotate by a driving motor inside the base 1. The interior of the sample box 2 is divided into several regions of the same size and shape by a partition 201. Different textures of soil are respectively installed in each region for the electromagnetic exploration electrode to explore the polarization potential under different geological conditions (such as clay, metal pollution, large resistivity change, large magnetic susceptibility change, etc.). The periphery of the base 1 is fixedly connected with a top cover 3 through a support frame 101. The top cover 3 just contacts the sample box 2 to complete the sealing, and the sample box 2 can rotate freely. The top of the top cover 3 is provided with a detection hole 301 and a soil sampling hole 302. The detection hole 301 and the soil sampling hole 302 are at equal distances from the center of the top cover 3. And a soil discharge groove 4 is opened in the direction away from the center of the top cover 3 of the soil sampling hole 302. Electromagnetic receivers are installed at the bottoms of different soil regions at the bottom of the sample box 2, which can detect the change in the magnitude of the electromagnetic signal of the electrode. The partition 201 can isolate the magnetic field to avoid interference.

[0028] A second guide rail frame 6 is bolted to the top of the soil sampling hole 302. The second guide rail frame 6 controls the second lifting block 8 to freely lift inside it through a second lead screw 601. A soil sampling blade 9 is installed at the bottom of the second lifting block 8 through a servo motor. The soil sampling blade 9 corresponds to the position of the soil sampling hole 302, and the size and specification of the soil sampling blade 9 can just pass through the soil sampling hole 302. While the soil sampling blade 9 rotates, the second lifting block 8 descends to drill a hole. When the soil sampling blade 9 drills a hole, it can transport the soil sample inside the sample box 2 upward and finally discharge it from the soil discharge groove 4. The discharged soil sample can be specifically detected for its basic properties to facilitate the distinction of different soils, which is beneficial to the subsequent distinction of polarization potential detection. And the extraction of the sample soil makes the degree of compression of the surrounding soil smaller after the electrode is inserted into the soil, and the polarization potential is more representative.

[0029] The diameter of the hole drilled by the soil-taking blade 9 is adapted to the diameter of the electrode, so that after the electrode is inserted, it can be in full contact with the soil. The driving motor inside the base 1 controls the rotation of the sample box 2. The soil area after soil-taking is rotated to the bottom of the detection hole 301, and the detection hole 301 corresponds to the drilling position of the soil. A first guide rail frame 5 is bolted to the top of the detection hole 301. The first guide rail frame 5 controls the first lifting block 7 to freely lift inside it through the first lead screw 501. A clamping hole 701 is opened in the first lifting block 7. Relief grooves 161 are opened at symmetrical positions on the side wall of the clamping hole 701. A notched gear 16 is slidably connected inside the relief groove 161. The notched gear 16 meshes with the driving gear 15 inside the first lifting block 7. The driving gear 15 is controlled by a servo motor and can accurately rotate the angle. Elastic air bags 17 are inlaid on the opposite sides of the two notched gears 16. The elastic air bags 17 are filled with thermally expandable gas. An electric heating plate is installed inside the notched gear 16 and is in contact with the elastic air bag 17. When the electric heating plate is heated, it can control the expansion of the elastic air bag 17. When the electrode passes through the clamping hole 701, the elastic air bag 17 expands to clamp the electrode, and the electrode can be precisely rotated at a slight angle by controlling the rotation of the servo motor.

[0030] A fixed protection frame 10 is fixedly connected to the bottom of the first lifting block 7. The fixed protection frame 10 is in contact with the electrode and the two can rotate relative to each other. The electric push rod 14 on the first lifting block 7 controls the lifting of the driving frame 13. The driving frame 13 is fixed with a moving protection frame 12. The moving protection frame 12 and the fixed protection frame 10 are slidably connected. When the electric push rod 14 is in a contracted state, the moving protection frame 12 and the fixed protection frame 10 form a tubular structure that wraps the electrode, so that the soil does not contact the electrode. During detection, the electric push rod 14 controls the moving protection frame 12 to rise, so that the detection probe group 11 is exposed, and the electrode also contacts the soil. The detection probe group 11 is composed of a variety of different sensors and can detect the soil conductivity, dielectric constant, magnetic susceptibility, humidity, temperature, salt content, etc. at the position where the electrode contacts the soil, which is beneficial to accurately analyze the contact potential and diffusion potential in the area around the electrode. The detection probe group 11 is shielded and protected by the moving protection frame 12 in the non-detection state, and the accuracy and service life are also greatly increased.

[0031] During detection, by controlling the rotation of the notched gear 16 that clamps the electrode, the precise rotation of the electrode can be achieved. By observing the numerical changes of the detection probe group 11 and the magnitude of the electromagnetic reception signal at the bottom of the sample box 2, the sensitivity of each position around the electrode can be accurately analyzed, defects can be detected, and the polarization potential data of the probe can also be made more three-dimensional and accurate.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test device for the electrode polarization potential in electromagnetic exploration, comprising a base (1) and an electrode, characterized in that, Further included are: A sample box (2), the sample box (2) is rotatably connected to the top of the base (1), a top cover (3) is arranged on the top of the sample box (2), and a detection hole (301) and a soil sampling hole (302) are arranged on the top of the top cover (3); A first lifting block (7), the first lifting block (7) is installed on the top of the top cover (3) through a lifting assembly, the first lifting block (7) corresponds to the detection hole (301), a clamping hole (701) is arranged through the top of the first lifting block (7), the clamping hole (701) is used for clamping an electrode, and two elastic air bags (17) are arranged inside the first lifting block (7), and the two elastic air bags (17) are symmetrically distributed on both sides of the clamping hole (701); A protection assembly, the protection assembly includes a fixed protection frame (10) fixedly installed at the bottom of the first lifting block (7), the fixed protection frame (10) corresponds to the clamping hole (701), a movable protection frame (12) is slidably connected to the fixed protection frame (10), the fixed protection frame (10) and the movable protection frame (12) form a tubular structure in combination, and the tubular structure is sleeved on the outer wall of the electrode. Detection probe groups (11) are respectively arranged on both sides of the fixed protection frame (10) close to the movable protection frame (12), and a telescopic assembly is arranged on the first lifting block (7).

2. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, A partition frame (201) is arranged inside the sample box (2), the partition frame (201) is used for dividing the inside of the sample box (2) into multiple regions with the same size and shape, and different textures of soil are filled in each of the multiple regions. A plurality of electromagnetic receivers are arranged at the bottom of the sample box (2), and the plurality of electromagnetic receivers respectively correspond to the multiple regions.

3. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, The detection hole (301) and the soil sampling hole (302) are at the same distance from the center of the circle of the top cover (3). A second guide rail frame (6) is fixedly installed on the top of the top cover (3) through bolts, the second guide rail frame (6) corresponds to the soil sampling hole (302), a second lifting block (8) is slidably connected to the second guide rail frame (6), a second lead screw (601) is rotatably connected to the inner wall of the second guide rail frame (6), the second lead screw (601) penetrates through the second lifting block (8) and is threadedly connected to the second lifting block (8).

4. The test device for electrode polarization potential in electromagnetic method exploration according to claim 3, characterized in that, Further included is a drilling mechanism, the drilling mechanism includes a servo motor fixedly installed inside the second lifting block (8), and a soil sampling blade (9) is fixedly connected to the output end of the servo motor. The soil sampling blade (9) is located below the second lifting block (8), the soil sampling blade (9) corresponds to the soil sampling hole (302), and a soil discharge groove (4) is arranged on the top of the top cover (3), the soil discharge groove (4) is located on one side of the soil sampling hole (302) away from the center of the circle of the top cover (3) and is communicated with the soil sampling hole (302).

5. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, The top of the top cover (3) is fixedly installed with a first guide rail frame (5) through bolts. The first guide rail frame (5) corresponds to the detection hole (301). The first lifting block (7) is slidably connected to the first guide rail frame (5). The inner wall of the first guide rail frame (5) is rotatably connected with a first lead screw (501). The first lead screw (501) passes through the first lifting block (7) and is threadedly connected to the first lifting block (7).

6. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, Two relief grooves (161) are arranged inside the first lifting block (7). The two relief grooves (161) are symmetrically distributed on both sides of the clamping hole (701). Two notched gears (16) are respectively slidably connected inside the two relief grooves (161). Two elastic air bags (17) are respectively fixedly installed on one side of the two notched gears (16) close to each other.

7. The testing device for electrode polarization potential in electromagnetic method exploration according to claim 6, characterized in that, Two drive gears (15) are rotatably connected inside the first lifting block (7). The two drive gears (15) are symmetrically distributed on both sides of the two notched gears (16). The drive gears (15) are meshed with the corresponding notched gears (16). Servos are respectively arranged at the bottoms of the two drive gears (15) and are fixedly connected to the output ends of the servos.

8. The test device for electrode polarization potential in electromagnetic method exploration according to claim 6, characterized in that, The elastic air bag (17) is filled with thermally expandable gas. A heating assembly is arranged on the first lifting block (7). The heating assembly is used to heat the thermally expandable gas in the elastic air bag (17). The heating assembly includes electric heating plates fixedly installed on the two notched gears (16), and the electric heating plates are in contact with the corresponding elastic air bags (17).

9. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, The telescopic assembly is used to drive the movable protection frame (12) to move up and down. The telescopic assembly includes two electric push rods (14) fixedly installed on the top of the first lifting block (7). The two electric push rods (14) are symmetrically distributed on both sides of the clamping hole (701). The tops of the two electric push rods (14) are respectively fixedly connected with a drive frame (13). The bottom of the drive frame (13) is fixedly connected with the top of the movable protection frame (12).

10. The test device for electrode polarization potential in electromagnetic method exploration according to claim 1, characterized in that, Four support frames (101) are fixedly installed on the top of the base (1). The four support frames (101) are circumferentially arrayed around the sample box (2). The side wall of the top cover (3) is fixedly connected with the support frames (101).

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