Rock core electrical property testing device and method

Abstract

The invention discloses a rock core electrical property testing device and method, and relates to the technical field of rock core electrical property testing, and the rock core electrical property testing device comprises a closed testing box body, a rotary lifting flexible supporting device, a visual analysis module, a supporting device controller based on a chip, an electrical property testing device and an electrical property analysis module. According to the invention, the to-be-tested rock core in an irregular shape is automatically positioned and supported through the rotary lifting flexible supporting device and the supporting device controller based on the chip, so that the rock core is prevented from being cut, polished and the like, and the distortion of the measured electrical property result caused by the damage to the original structure of the to-be-tested rock core is avoided. The electrical performance test control circuit board and the electrical performance analysis module are combined, so that voltage and current data can be acquired in real time, and a detailed electrical performance test result of the core to be tested is analyzed and output based on a test value. The automation level, the test precision and the test efficiency of the core electrical property test can be obviously improved, and the operation difficulty and the maintenance cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of core electrical performance testing, and in particular to a core electrical performance testing device and method. Background Art

[0002] Core electrical performance testing is an important task in oil and gas field exploration and development. It is of great significance to understand the conductivity, pore structure, fluid properties and other parameters of the rock. Through core electrical performance testing, we can understand the conductivity of the oil and gas reservoir, and then judge the type, quality and distribution of the oil and gas reservoir.

[0003] The test results provide a basis for reservoir reconstruction, such as fracturing, acidizing and other operations. By monitoring the changes in the electrical properties of the core, we can understand the changes in fluid saturation during reservoir development and provide a basis for production adjustments. It is helpful to study the pore structure of rocks, fluid properties and physical and chemical properties of rocks.

[0004] Traditional core electrical property testing methods often require cutting and grinding of the core, which destroys the original structure of the core.

[0005] Due to the heterogeneity of the internal structure of the core, traditional testing methods are difficult to accurately reflect the electrical properties of the entire core.

[0006] The processing, testing and data analysis of core samples take a long time, affecting work efficiency. Summary of the invention

[0007] In order to solve the above technical problems of core electrical performance testing, the present invention provides a core electrical performance testing device and method. The following technical solutions are adopted: A core electrical performance testing device comprises a closed test box, a rotating and lifting flexible support device, a visual analysis module, a chip-based support device controller, an electrical performance testing device and an electrical performance analysis module, wherein the rotating and lifting flexible support device comprises an electric rotating mechanism, an electric lifting mechanism, a supporting base plate and a plurality of electrically controlled flexible support rods, wherein the base of the electric rotating mechanism is mounted at the center position of the inner wall of the closed test box, the bottom of the electric lifting mechanism is mounted on the rotating part of the electric rotating mechanism, the bottom of the supporting base plate is detachably mounted on the top surface of the lifting part of the electric lifting mechanism, the top surface of the supporting base plate is provided with a plurality of flexible support rod mounting grooves and a camera mounting groove, the bottoms of the plurality of electrically controlled flexible support rods are respectively mounted at the plurality of flexible support rod mounting grooves, the visual analysis module is mounted at the camera mounting groove, and is used to capture the bottom visual picture of the core to be tested, and obtain the bottom geometric features of the core to be tested based on the bottom visual picture analysis, and obtain the bottom geometric features of the core to be tested based on the geometric features. The support point heights of the multiple electrically-controlled flexible support rods corresponding to the bottom of the core to be tested are obtained by analysis, and the visual analysis module interacts with the support device controller to obtain the visual analysis results. The support device controller generates control instructions for controlling the multiple electrically-controlled flexible support rods respectively, and controls the multiple electrically-controlled flexible support rods to adjust their heights respectively so that the bottom of the core to be tested is evenly supported. The electrical performance testing device includes a pair of telescopic electrical performance testing terminals and an electrical performance testing control circuit board. The pair of telescopic electrical performance testing terminals are respectively installed on the inner wall of the closed test box, and are respectively electrically connected to the test output ends of the electrical performance testing control circuit board. The support device controller controls the actions of the electric rotating mechanism and the electric lifting mechanism respectively so that the two ends of the geometric axis of the core to be tested, whose bottom is evenly supported, face the pair of telescopic electrical performance testing terminals of the electrical performance testing device. The electrical performance analysis module is communicatively connected to the electrical performance testing control circuit board, and outputs the electrical performance test results of the core to be tested based on the test value analysis.

[0008] By adopting the above technical solution, the automatic positioning and support of the irregularly shaped core to be tested can be achieved by rotating and lifting the flexible support device and the chip-based support device controller, avoiding cutting, grinding and other treatments on the core, and avoiding destroying the original structure of the core to be tested, resulting in distortion of the measured electrical performance results; Multiple electrically controlled flexible support rods can automatically adjust their height according to the geometric features of the bottom of the core to be tested, ensuring that cores of different shapes and sizes can be evenly supported. It has strong adaptability and is suitable for a variety of core samples.

[0009] A pair of telescopic electrical performance test terminals can be accurately aligned with the geometric axis of the core, ensuring good contact during electrical performance testing, thereby improving the accuracy of test data.

[0010] The combination of the electrical performance test control circuit board and the electrical performance analysis module can collect voltage and current data in real time, and output detailed electrical performance test results of the core to be tested based on the test value analysis output.

[0011] It can significantly improve the automation level, test accuracy and efficiency of core electrical performance testing, while reducing operation difficulty and maintenance costs.

[0012] Optionally, it also includes an inflation and exhaust pump, an air pressure sensor and a chip-based pressure controller, wherein the inflation and exhaust pump is connected to the interior of a closed test box through a pipeline, the air pressure sensor monitors the air pressure value inside the closed test box, and the pressure controller controls the execution of the inflation and exhaust pump based on the set air pressure value so that the air pressure inside the closed test box is consistent with the set air pressure value.

[0013] By adopting the above technical solution, the set air pressure value refers to the air pressure value at the sampling point of the core to be tested. By performing electrical performance tests under the same air pressure value, the actual electrical performance of the core to be tested can be better reflected.

[0014] Optionally, the electric rotating mechanism is a servo electric turntable, the electric lifting mechanism is a servo electric cylinder, and the electric-controlled flexible support rod is a servo electric rod.

[0015] By adopting the above technical solutions, the servo electric turntable can achieve high-precision rotation motion control, the servo electric cylinder can achieve high-precision lifting control, and the servo electric rod can achieve high-precision position adjustment.

[0016] Optionally, the visual analysis module includes a visual camera, a memory and a visual analysis chip, wherein the visual camera is mounted at a camera mounting slot of a supporting base plate with the lens facing upward, the memory is communicatively connected to the visual camera, and the visual analysis chip is communicatively connected to the memory.

[0017] By adopting the above technical solution, the visual analysis chip can analyze the bottom visual picture of the memory interaction to obtain the bottom geometric features of the core to be tested. The specific visual analysis chip processes the bottom visual picture using the following specific solution: Convert color images to grayscale images to reduce computational complexity. Image filtering: Apply Gaussian filtering or median filtering to remove noise. Use Sobel or Canny operators to enhance the edges of the core.

[0018] Use the Canny edge detection algorithm to find the edges in the image. Use the findContours method to extract the edge contours. Filter out the main contours representing the bottom of the core based on the size and shape of the contours.

[0019] Calculate the geometric features of the filtered contours, such as area, perimeter, center of mass, moment of inertia, etc.

[0020] Find the minimum circumscribed circle that can enclose the bottom contour of the core and determine the radius of the core. Calculate the convex hull of the contour to further analyze the shape of the core. Determine the location of the support point based on the minimum circumscribed circle or convex hull.

[0021] Optionally, the support device controller includes a cache, a command chip and a main control chip. The cache is communicatively connected to the visual analysis chip, and the command chip is communicatively connected to the cache to respectively generate control instructions for controlling the electric rotating mechanism, the electric lifting mechanism and the multiple electrically-controlled flexible support rods. The main control chip communicates with the command chip to exchange control instructions, and controls the execution actions of the electric rotating mechanism, the electric lifting mechanism and the multiple electrically-controlled flexible support rods based on the control instructions.

[0022] Optionally, the telescopic electrical performance test terminal includes an electric telescopic rod, a spring rod and a test terminal, the electric telescopic rod is installed on the inner wall of a closed test box, one end of the spring rod is installed on the telescopic part of the electric telescopic rod, and the test terminal is installed on the other end of the spring rod and is electrically connected to the electrical performance test control circuit board. When the electric telescopic rods of a pair of telescopic electrical performance test terminals are extended, a pair of test terminals respectively press the two ends of the rock core to be tested.

[0023] By adopting the above technical solution, when the electric telescopic rods of a pair of telescopic electrical performance test terminals are extended, the pair of test terminals respectively abut against the two ends of the rock core to be tested, and the pair of test terminals are reliably connected to the two ends of the rock core to be tested when the spring rod descends.

[0024] Optionally, the electrical performance test control circuit board includes a circuit substrate, a test signal generating circuit, a measurement circuit, a data acquisition circuit and an interface circuit, wherein the test signal generating circuit, the measurement circuit, the data acquisition circuit and the interface circuit are integrated on the circuit substrate, the test electrical signal output end of the test signal generating circuit is electrically connected to a pair of telescopic electrical performance test terminals, respectively, the measurement circuit is electrically connected to a pair of telescopic electrical performance test terminals, respectively, for measuring voltage and current, the data acquisition circuit is electrically connected to the measurement circuit to collect electrical performance test data, the interface circuit is communicatively connected to the data acquisition circuit, and is also communicatively connected to the electrical performance analysis module.

[0025] By adopting the above technical solution, the test signal generating circuit generates the required test signal (such as DC voltage, AC voltage or pulse signal). The measuring circuit includes a current measuring circuit, a voltage measuring circuit, an oscilloscope circuit, etc., which are used to measure the voltage between electrodes and the current passing through the core.

[0026] It is used to convert analog signals into digital signals for easy analysis and processing, and the interface circuit is used to communicate and exchange data with external devices.

[0027] Optionally, the electrical performance analysis module includes a data storage device and a data analysis computer, wherein the data storage device is communicatively connected to the interface circuit, and the data analysis computer is communicatively connected to the data storage device, and the data analysis computer analyzes the electrical performance test results of the core to be tested based on a deep learning algorithm.

[0028] A core electrical performance testing method, using a core electrical performance testing device to test the electrical performance of a core to be tested, comprises the following steps: Step 1, open the closed test box, the support device controller controls the piston rods of the four electrically controlled flexible support rods at the four corners to be at the maximum stroke, and the core to be tested is placed on the piston rods of the four electrically controlled flexible support rods; Step 2: The visual camera captures the bottom visual image of the core to be tested, and the visual analysis chip obtains the bottom geometric features of the core to be tested based on the bottom visual image analysis. Based on the geometric feature analysis, the heights of the support points of the multiple electrically controlled flexible support rods corresponding to the bottom of the core to be tested are obtained, and the visual analysis chip interacts with the support device controller to obtain the visual analysis results; Step 3, the command chip generates control instructions for controlling the electric rotating mechanism, the electric lifting mechanism and the multiple electrically controlled flexible support rods respectively, and the main control chip controls the execution actions of the electric rotating mechanism, the electric lifting mechanism and the multiple electrically controlled flexible support rods respectively based on the control instructions, so that the bottom of the core to be tested is evenly supported, and the two ends are aligned with a pair of telescopic electrical performance test terminals; Step 4, close the closed test box, set the test air pressure value, and the pressure controller controls the execution of the air pump based on the set air pressure value to make the air pressure in the closed test box consistent with the set air pressure value, and the air pressure value is the corresponding air pressure value of the core mining position to be tested; Step 5, the electric telescopic rods of a pair of telescopic electrical performance test terminals are extended, and the pair of test terminals are respectively against the two ends of the core to be tested; Step 6, the test signal generating circuit of the electrical performance test control circuit board generates an electrical performance test signal; Step 7: The data analysis computer collects the measured voltage and current of the electrical performance test control circuit board and outputs the electrical performance test results of the core to be tested.

[0029] Optionally, in step 6, the electrical property test results of the core to be tested are: resistivity, conductivity, impedance and current-voltage characteristic curve.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects: The present invention can provide a core electrical performance testing device and method, which can realize automatic positioning and support of irregular-shaped cores to be tested by rotating and lifting flexible support devices and chip-based support device controllers, avoid cutting, grinding and other treatments on the cores, avoid destroying the original structure of the cores to be tested and causing distortion of the measured electrical performance results; Multiple electrically controlled flexible support rods automatically adjust their height according to the geometric features of the bottom of the core to be tested, ensuring that cores of different shapes and sizes can be evenly supported. It has strong adaptability and is suitable for a variety of core samples.

[0031] A pair of telescopic electrical performance test terminals can be accurately aligned with the geometric axis of the core, ensuring good contact during electrical performance testing, thereby improving the accuracy of test data.

[0032] The combination of the electrical performance test control circuit board and the electrical performance analysis module can collect voltage and current data in real time, and output detailed electrical performance test results of the core to be tested based on the test value analysis output.

[0033] It can significantly improve the automation level, test accuracy and efficiency of core electrical performance testing, while reducing operation difficulty and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the internal structure principle of a core electrical performance testing device of the present invention in a test state; Figure 2 This is a schematic diagram of the connection principle of the electrical components of a supporting device controller for a core electrical performance testing device of the present invention to control the rotating lifting flexible supporting device Figure 3 It is a schematic diagram of communication connection between an electrical performance analysis module and an electrical performance testing device of a core electrical performance testing device of the present invention.

[0035] Explanation of the accompanying drawings: 1. Closed test box; 21. Electric rotating mechanism; 22. Electric lifting mechanism; 23. Support bottom plate; 24. Electric-controlled flexible support rod; 3. Visual analysis module; 31. Visual camera; 32. Memory; 33. Visual analysis chip; 4. Support device controller; 41. Buffer; 42. Instruction chip; 43. Main control chip; 51. Telescopic electrical performance test terminal; 511. Electric telescopic rod; 512. Spring rod; 513. Test terminal; 52. Electrical performance test control circuit board; 521. Circuit substrate; 522. Test signal generating circuit; 523. Measurement circuit; 524. Data acquisition circuit; 525. Interface circuit; 6. Electrical performance analysis module; 61. Data storage device; 62. Data analysis computer; 71. Inflatable air pump; 100. Core to be tested. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] The embodiment of the invention discloses a core electrical property testing device and method.

[0038] Reference Figure 1-Figure 3 Embodiment 1, a core electrical performance testing device, comprising a closed test box 1, a rotating and lifting flexible support device, a visual analysis module 3, a chip-based support device controller 4, an electrical performance testing device and an electrical performance analysis module 6, the rotating and lifting flexible support device comprising an electric rotating mechanism 21, an electric lifting mechanism 22, a supporting bottom plate 23 and a plurality of electrically controlled flexible support rods 24, the base of the electric rotating mechanism 21 is installed at the center position of the inner wall of the closed test box 1, the bottom of the electric lifting mechanism 22 is installed on the rotating part of the electric rotating mechanism 21, the bottom of the supporting bottom plate 23 is detachably installed on the top surface of the lifting part of the electric lifting mechanism 22, the top surface of the supporting bottom plate 23 is provided with a plurality of flexible support rod mounting grooves and a camera mounting groove, the bottoms of the plurality of electrically controlled flexible support rods 24 are respectively installed at the plurality of flexible support rod mounting grooves, the visual analysis module 3 is installed at the camera mounting groove, and is used to capture the bottom visual picture of the core 100 to be tested, and obtain the bottom geometric features of the core 100 to be tested based on the bottom visual picture analysis, and obtain the bottom geometric features of the core 100 to be tested based on the geometric feature analysis. The visual analysis module 3 exchanges the visual analysis results with the support device controller 4 to determine the support point height of the bottom of the core 100 to be tested corresponding to the multiple electrically controlled flexible support rods 24. The support device controller 4 generates control instructions for controlling the multiple electrically controlled flexible support rods 24 respectively, and controls the multiple electrically controlled flexible support rods 24 to adjust the height so that the bottom of the core 100 to be tested is evenly supported. The electrical performance testing device includes a pair of telescopic electrical performance testing terminals 51 and an electrical performance testing control circuit board 52. The pair of telescopic electrical performance testing terminals 51 are respectively installed on the inner wall of the closed test box 1, and are respectively electrically connected to the test output ends of the electrical performance testing control circuit board 52. The support device controller 4 controls the actions of the electric rotating mechanism 21 and the electric lifting mechanism 22 respectively so that the two ends of the geometric axis of the core 100 to be tested, whose bottom is evenly supported, are directly opposite to the pair of telescopic electrical performance testing terminals 51 of the electrical performance testing device. The electrical performance analysis module 6 is connected to the electrical performance testing control circuit board 52 for communication, and outputs the electrical performance test results of the core 100 to be tested based on the test value analysis.

[0039] By rotating and lifting the flexible support device and the chip-based support device controller, the irregular-shaped core 100 to be tested can be automatically positioned and supported, avoiding cutting, grinding and other treatments on the core, and avoiding damage to the original structure of the core 100 to be tested, resulting in distortion of the measured electrical performance results; The multiple electrically controlled flexible support rods 24 can automatically adjust their heights according to the geometric features of the bottom of the core 100 to be tested, ensuring that cores of different shapes and sizes can be evenly supported. The rods have strong adaptability and are suitable for a variety of core samples.

[0040] A pair of telescopic electrical performance test terminals 51 can be accurately aligned with the geometric axis of the core, ensuring good contact of the electrical performance test, thereby improving the accuracy of the test data.

[0041] The combination of the electrical performance test control circuit board 52 and the electrical performance analysis module 6 can collect voltage and current data in real time, and output detailed electrical performance test results of the core 100 to be tested based on the test value analysis.

[0042] It can significantly improve the automation level, test accuracy and efficiency of core electrical performance testing, while reducing operation difficulty and maintenance costs.

[0043] Embodiment 2 also includes an inflation and exhaust pump 71, an air pressure sensor and a chip-based pressure controller. The inflation and exhaust pump 71 is connected to the interior of the closed test box 1 through a pipeline. The air pressure sensor monitors the air pressure value in the closed test box 1. The pressure controller controls the execution action of the inflation and exhaust pump 71 based on the set air pressure value so that the air pressure in the closed test box 1 is consistent with the set air pressure value.

[0044] The set air pressure value refers to the air pressure value at the sampling point of the core 100 to be tested. By performing the electrical performance test under the same air pressure value, the real electrical performance of the core 100 to be tested can be better reflected.

[0045] In specific applications, the closed test box 1 can be a box with an openable and closable top. When the top is closed, the air pressure in the closed test box 1 can be precisely adjusted by inflating or deflating the air pump 71 .

[0046] In the third embodiment, the electric rotating mechanism 21 is a servo electric turntable, the electric lifting mechanism 22 is a servo electric cylinder, and the electric-controlled flexible support rod 24 is a servo electric rod.

[0047] The servo electric turntable can achieve high-precision rotation motion control, the servo electric cylinder can achieve high-precision lifting control, and the servo electric rod can achieve high-precision position adjustment.

[0048] Embodiment 4, the visual analysis module 3 includes a visual camera 31, a memory 32 and a visual analysis chip 33, the visual camera 31 is installed in the camera mounting slot of the supporting base plate 23 with the lens facing upward, the memory 32 is communicatively connected to the visual camera 31, and the visual analysis chip 33 is communicatively connected to the memory 32.

[0049] The visual analysis chip 33 can analyze the bottom visual picture interacting with the memory 32 to obtain the bottom geometric features of the core 100 to be tested. Specifically, the visual analysis chip 33 processes the bottom visual picture using the following specific scheme: Convert color images to grayscale images to reduce computational complexity. Image filtering: Apply Gaussian filtering or median filtering to remove noise. Use Sobel or Canny operators to enhance the edges of the core.

[0050] Use the Canny edge detection algorithm to find the edges in the image. Use the findContours method to extract the edge contours. Filter out the main contours representing the bottom of the core based on the size and shape of the contours.

[0051] Calculate the geometric features of the filtered contours, such as area, perimeter, center of mass, moment of inertia, etc.

[0052] Find the minimum circumscribed circle that can enclose the bottom contour of the core and determine the radius of the core. Calculate the convex hull of the contour to further analyze the shape of the core. Determine the location of the support point based on the minimum circumscribed circle or convex hull.

[0053] Embodiment 5, the support device controller 4 includes a buffer 41, a command chip 42 and a main control chip 43, the buffer 41 is communicatively connected to the visual analysis chip 33, the command chip 42 is communicatively connected to the buffer 41, and respectively generates control instructions for controlling the electric rotating mechanism 21, the electric lifting mechanism 22 and the multiple electrically-controlled flexible support rods 24, the main control chip 43 communicates with the command chip 42 to exchange control instructions, and controls the execution actions of the electric rotating mechanism 21, the electric lifting mechanism 22 and the multiple electrically-controlled flexible support rods 24 based on the control instructions.

[0054] Embodiment 6, the telescopic electrical performance test terminal 51 includes an electric telescopic rod 511, a spring rod 512 and a test terminal 513, the electric telescopic rod 511 is installed on the inner wall of the closed test box 1, one end of the spring rod 512 is installed on the telescopic part of the electric telescopic rod 511, the test terminal 513 is installed on the other end of the spring rod 512, and is electrically connected to the electrical performance test control circuit board 52. When the electric telescopic rod 511 of a pair of telescopic electrical performance test terminals 51 is extended, a pair of test terminals 513 respectively press the two ends of the core 100 to be tested.

[0055] When the electric telescopic rods 511 of the pair of telescopic electrical performance test terminals 51 are extended, the pair of test terminals 513 respectively abut against the two ends of the core 100 to be tested, and the spring rod 512 lowers the pair of test terminals 513 to be reliably connected to the two ends of the core 100 to be tested.

[0056] Embodiment 7, the electrical performance test control circuit board 52 includes a circuit substrate 521, a test signal generating circuit 522, a measuring circuit 523, a data acquisition circuit 524 and an interface circuit 525, the test signal generating circuit 522, the measuring circuit 523, the data acquisition circuit 524 and the interface circuit 525 are integrated on the circuit substrate 521, the test electrical signal output end of the test signal generating circuit 522 is electrically connected to a pair of telescopic electrical performance test terminals 51, respectively, the measuring circuit 523 is electrically connected to a pair of telescopic electrical performance test terminals 51, respectively, for measuring voltage and current, the data acquisition circuit 524 is electrically connected to the measuring circuit 523 to collect electrical performance test data, the interface circuit 525 is communicatively connected to the data acquisition circuit 524, and is also communicatively connected to the electrical performance analysis module 6.

[0057] The test signal generating circuit 522 generates the required test signal (such as DC voltage, AC voltage or pulse signal). The measuring circuit 523 includes a current measuring circuit, a voltage measuring circuit, an oscilloscope circuit, etc., which are used to measure the voltage between electrodes and the current passing through the core.

[0058] The interface circuit 525 is used to convert analog signals into digital signals for easy analysis and processing, and is used to communicate and exchange data with external devices.

[0059] Embodiment 8, the electrical performance analysis module 6 includes a data storage device 61 and a data analysis computer 62, the data storage device 61 is communicatively connected to the interface circuit 525, the data analysis computer 62 is communicatively connected to the data storage device 61, and the data analysis computer 62 analyzes the electrical performance test results of the core 100 to be tested based on a deep learning algorithm.

[0060] Embodiment 9, a method for testing the electrical properties of a core, using a core electrical properties testing device to test the electrical properties of a core 100 to be tested, comprising the following steps: Step 1, open the closed test box 1, the support device controller 4 controls the piston rods of the four electrically controlled flexible support rods 24 at the four corners to be at the maximum stroke, and place the core 100 to be tested on the piston rods of the four electrically controlled flexible support rods 24; Step 2, the visual camera 31 captures the bottom visual image of the core to be tested 100, the visual analysis chip 33 obtains the bottom geometric features of the core to be tested 100 based on the bottom visual image analysis, obtains the support point heights of the plurality of electrically controlled flexible support rods 24 corresponding to the bottom of the core to be tested 100 based on the geometric feature analysis, and the visual analysis chip 33 exchanges the visual analysis results with the support device controller 4; Step 3, the instruction chip 42 generates control instructions for controlling the electric rotating mechanism 21, the electric lifting mechanism 22 and the multiple electrically controlled flexible support rods 24 respectively, and the main control chip 43 controls the execution actions of the electric rotating mechanism 21, the electric lifting mechanism 22 and the multiple electrically controlled flexible support rods 24 respectively based on the control instructions, so that the bottom of the core 100 to be tested is evenly supported, and the two ends are aligned with a pair of telescopic electrical performance test terminals 51; Step 4, close the closed test box 1, set the test air pressure value, and the pressure controller controls the execution of the air pump 71 based on the set air pressure value to make the air pressure in the closed test box 1 consistent with the set air pressure value, and the air pressure value is the corresponding air pressure value of the mining position of the core 100 to be tested; Step 5, the electric telescopic rods 511 of the pair of telescopic electrical performance test terminals 51 are extended, and the pair of test terminals 513 are respectively pressed against the two ends of the core 100 to be tested; Step 6, the test signal generating circuit 522 of the electrical performance test control circuit board 52 generates an electrical performance test signal; Step 7: The data analysis computer 62 collects the measured voltage and current of the electrical performance test control circuit board 52 and outputs the electrical performance test result of the core 100 to be tested.

[0061] In Example 10, in step 6, the electrical property test results of the core 100 to be tested are: resistivity, conductivity, impedance and current-voltage characteristic curve.

[0062] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A core electrical performance testing device, characterized in that: The invention comprises a closed test box (1), a rotating and lifting flexible support device, a visual analysis module (3), a chip-based support device controller (4), an electrical performance test device and an electrical performance analysis module (6), wherein the rotating and lifting flexible support device comprises an electric rotating mechanism (21), an electric lifting mechanism (22), a support bottom plate (23) and a plurality of electrically controlled flexible support rods (24), wherein the base of the electric rotating mechanism (21) is mounted at the center of the inner wall of the closed test box (1), and the bottom of the electric lifting mechanism (22) is mounted on the rotating portion of the electric rotating mechanism (21). The bottom of the support base plate (23) is detachably mounted on the top surface of the lifting part of the electric lifting mechanism (22); the top surface of the support base plate (23) is provided with a plurality of flexible support rod mounting grooves and a camera mounting groove; the bottoms of the plurality of electrically controlled flexible support rods (24) are respectively mounted at the plurality of flexible support rod mounting grooves; the visual analysis module (3) is mounted at the camera mounting grooves and is used to capture a bottom visual image of the test core (100); and based on the bottom visual image, obtain the bottom geometric features of the test core (100); and based on the geometric feature analysis, obtain the bottom geometric features of the plurality of electrically controlled flexible support rods (24). The support rod (24) corresponds to the support point height of the bottom of the core to be tested (100), the visual analysis module (3) and the support device controller (4) exchange visual analysis results, the support device controller (4) generates control instructions for controlling the plurality of electrically controlled flexible support rods (24) respectively, and controls the plurality of electrically controlled flexible support rods (24) to adjust their heights so that the bottom of the core to be tested (100) is evenly supported, the electrical performance testing device comprises a pair of telescopic electrical performance testing terminals (51) and an electrical performance testing control circuit board (52), the pair of telescopic electrical performance testing terminals (51) respectively The electric performance test device (100) is installed on the inner wall of the closed test box (1) and is electrically connected to the test output terminals of the electric performance test control circuit board (52). The support device controller (4) controls the actions of the electric rotating mechanism (21) and the electric lifting mechanism (22) respectively so that the two ends of the geometric axis of the tested rock core (100) with the bottom evenly supported face the pair of telescopic electric performance test terminals (51) of the electric performance test device. The electric performance analysis module (6) is connected to the electric performance test control circuit board (52) for communication and outputs the electric performance test results of the tested rock core (100) based on the test value analysis.

2. A core electrical performance testing device according to claim 1, characterized in that: It also includes an air inflation and air extraction pump (71), an air pressure sensor, and a chip-based pressure controller, wherein the air inflation and air extraction pump (71) is connected to the interior of the closed test box (1) through a pipeline, the air pressure sensor monitors the air pressure value in the closed test box (1), and the pressure controller controls the execution action of the air inflation and air extraction pump (71) based on a set air pressure value so that the air pressure in the closed test box (1) is consistent with the set air pressure value.

3. A core electrical performance testing device according to claim 2, characterized in that: The electric rotating mechanism (21) is a servo electric turntable, the electric lifting mechanism (22) is a servo electric cylinder, and the electric-controlled flexible support rod (24) is a servo electric rod.

4. A core electrical performance testing device according to claim 3, characterized in that: The visual analysis module (3) comprises a visual camera (31), a memory (32) and a visual analysis chip (33); the visual camera (31) is mounted on a camera mounting slot of a supporting base plate (23) with a lens facing upward; the memory (32) is communicatively connected to the visual camera (31); and the visual analysis chip (33) is communicatively connected to the memory (32).

5. A core electrical performance testing device according to claim 4, characterized in that: The support device controller (4) comprises a buffer (41), a command chip (42) and a main control chip (43); the buffer (41) is communicatively connected to the visual analysis chip (33); the command chip (42) is communicatively connected to the buffer (41), and respectively generates control instructions for controlling the electric rotating mechanism (21), the electric lifting mechanism (22) and the plurality of electrically controlled flexible support rods (24); the main control chip (43) communicates and interacts with the command chip (42) to exchange control instructions, and respectively controls the execution actions of the electric rotating mechanism (21), the electric lifting mechanism (22) and the plurality of electrically controlled flexible support rods (24) based on the control instructions.

6. A core electrical performance testing device according to claim 5, characterized in that: The telescopic electrical performance test terminal (51) comprises an electric telescopic rod (511), a spring rod (512) and a test terminal (513); the electric telescopic rod (511) is mounted on the inner wall of a closed test box (1); one end of the spring rod (512) is mounted on the telescopic portion of the electric telescopic rod (511); the test terminal (513) is mounted on the other end of the spring rod (512) and is electrically connected to an electrical performance test control circuit board (52); when the electric telescopic rods (511) of a pair of telescopic electrical performance test terminals (51) are extended, the pair of test terminals (513) respectively press the two ends of a core (100) to be tested.

7. A core electrical performance testing device according to claim 6, characterized in that: The electrical performance test control circuit board (52) comprises a circuit substrate (521), a test signal generating circuit (522), a measuring circuit (523), a data acquisition circuit (524) and an interface circuit (525); the test signal generating circuit (522), the measuring circuit (523), the data acquisition circuit (524) and the interface circuit (525) are integrated on the circuit substrate (521); the test electrical signal output end of the test signal generating circuit (522) is respectively electrically connected to a pair of telescopic electrical performance test terminals (51); the measuring circuit (523) is respectively electrically connected to a pair of telescopic electrical performance test terminals (51) for measuring voltage and current; the data acquisition circuit (524) is electrically connected to the measuring circuit (523) for collecting electrical performance test data; the interface circuit (525) is communicatively connected to the data acquisition circuit (524) and is also communicatively connected to an electrical performance analysis module (6).

8. A core electrical performance testing device according to claim 7, characterized in that: The electrical performance analysis module (6) comprises a data storage device (61) and a data analysis computer (62), wherein the data storage device (61) is communicatively connected to the interface circuit (525), and the data analysis computer (62) is communicatively connected to the data storage device (61), and the data analysis computer (62) analyzes the electrical performance test results of the core to be tested (100) based on a deep learning algorithm.

9. A method for testing the electrical properties of a core, characterized in that: The electrical performance test device for a core according to claim 8 is used to test an electrical performance of a core (100) to be tested, comprising the following steps: Step 1, open the closed test box (1), the support device controller (4) controls the piston rods of the four electrically controlled flexible support rods (24) at the four corners to be at the maximum stroke, and place the core (100) to be tested on the piston rods of the four electrically controlled flexible support rods (24); Step 2, the visual camera (31) captures a visual image of the bottom of the rock core (100) to be tested, the visual analysis chip (33) obtains the bottom geometric features of the rock core (100) to be tested based on the bottom visual image analysis, obtains the support point heights of the plurality of electrically controlled flexible support rods (24) corresponding to the bottom of the rock core (100) to be tested based on the geometric feature analysis, and the visual analysis chip (33) interacts with the support device controller (4) to obtain the visual analysis results; Step 3, the command chip (42) generates control instructions for controlling the electric rotating mechanism (21), the electric lifting mechanism (22) and the plurality of electrically controlled flexible support rods (24), and the main control chip (43) controls the execution actions of the electric rotating mechanism (21), the electric lifting mechanism (22) and the plurality of electrically controlled flexible support rods (24) based on the control instructions, so that the bottom of the core (100) to be tested is evenly supported and the two ends are aligned with a pair of telescopic electrical performance test terminals (51); Step 4, closing the closed test box (1), setting a test air pressure value, and the pressure controller controlling the execution of the air filling and air extraction pump (71) based on the set air pressure value so that the air pressure in the closed test box (1) is consistent with the set air pressure value, and the air pressure value is the corresponding air pressure value at the mining position of the core (100) to be tested; Step 5, the electric telescopic rods (511) of a pair of telescopic electrical performance test terminals (51) are extended, and a pair of test terminals (513) are respectively pressed against two ends of the core (100) to be tested; Step 6, the test signal generating circuit (522) of the electrical performance test control circuit board (52) generates an electrical performance test signal; Step 7: The data analysis computer (62) collects the measured voltage and current of the electrical performance test control circuit board (52), and outputs the electrical performance test results of the core (100) to be tested.

10. A core electrical performance testing method according to claim 9, characterized in that: In step 6, the electrical property test results of the core (100) to be tested are: resistivity, conductivity, impedance and current-voltage characteristic curve.

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