A device and method for testing the electrical properties of rock

Abstract

The present invention discloses a rock core electrical property testing device and method, which relates to the technical field of rock core electrical property testing, and includes a closed testing box body, a rotary lifting flexible support device, a visual analysis module, a chip-based support device controller, an electrical property testing device, and an electrical property analysis module. The present invention realizes the automatic positioning and support of irregularly shaped rock cores to be tested through the rotary lifting flexible support device and the chip-based support device controller, avoiding processing such as cutting and grinding of the rock cores, and avoiding the distortion of the measured electrical property results caused by the destruction of the original structure of the rock cores to be tested. The combination of the electrical property testing control circuit board and the electrical property analysis module can collect voltage and current data in real time, and analyze and output detailed electrical property testing results of the rock cores to be tested based on the test values. It can significantly improve the automation level, testing accuracy and efficiency of rock core electrical property testing, while reducing the operation difficulty and maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of rock electrophysical property testing, and in particular to a device and method for testing rock electrophysical properties. Background Art

[0002] Rock electrophysical property testing is an important task in oil and gas field exploration and development. It is of great significance for understanding parameters such as the conductivity, pore structure, and fluid properties of rocks. Through rock electrophysical property testing, the conductivity of the oil and gas reservoir can be understood, and then the type, quality, and distribution of the oil and gas reservoir can be judged.

[0003] The test results provide a basis for reservoir stimulation operations such as fracturing and acidizing. By monitoring the changes in rock electrophysical properties, the changes in fluid saturation during the oil reservoir development process can be understood, providing a basis for production adjustment. It helps to study the pore structure, fluid properties, and physical and chemical properties of rocks.

[0004] Traditional rock electrophysical property testing methods often require processing such as cutting and grinding of the core, which destroys the original structure of the core.

[0005] Due to the non-uniformity of the internal structure of the core, traditional testing methods are difficult to accurately reflect the electrophysical 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 rock electrophysical property testing, the present invention provides a device and method for testing rock electrophysical properties. The following technical solutions are adopted:

[0008] A rock core electrical property testing device includes an enclosed testing box body, a rotary lifting flexible support device, a visual analysis module, a support device controller based on a chip, an electrical property testing device, and an electrical property analysis module. The rotary lifting flexible support device includes an electric rotary mechanism, an electric lifting mechanism, a support bottom plate, and multiple electrically controlled flexible support rods. The base of the electric rotary mechanism is installed at the center position of the inner wall of the enclosed testing box body. The bottom of the electric lifting mechanism is installed on the rotary part of the electric rotary mechanism. The bottom of the support bottom plate is detachably installed on the top surface of the lifting part of the electric lifting mechanism. The top surface of the support bottom plate is provided with multiple flexible support rod installation slots and a camera installation slot. The bottoms of the multiple electrically controlled flexible support rods are respectively installed at the multiple flexible support rod installation slots. The visual analysis module is installed at the camera installation slot and is used to capture the bottom visual image of the rock core to be tested, analyze the bottom geometric features of the rock core to be tested based on the bottom visual image, and obtain the support point heights of the multiple electrically controlled flexible support rods corresponding to the bottom of the rock core to be tested based on the geometric feature analysis. The visual analysis module interacts with the support device controller for the visual analysis result. The support device controller generates control commands for respectively controlling the multiple electrically controlled flexible support rods and respectively controls the multiple electrically controlled flexible support rods to adjust their heights so that the bottom of the rock core to be tested is evenly supported. The electrical property testing device includes a pair of telescopic electrical property testing terminals and an electrical property testing control circuit board. The pair of telescopic electrical property testing terminals are respectively installed on the inner wall of the enclosed testing box body and are respectively electrically connected to the test output terminals of the electrical property testing control circuit board. The support device controller respectively controls the actions of the electric rotary mechanism and the electric lifting mechanism so that the geometric axes at both ends of the rock core to be tested with the bottom evenly supported are directly opposite to the pair of telescopic electrical property testing terminals of the electrical property testing device. The electrical property analysis module is communicatively connected to the electrical property testing control circuit board and analyzes and outputs the electrical property test result of the rock core to be tested based on the test value.

[0009] By adopting the above technical solution, through the rotary lifting flexible support device and the support device controller based on a chip, automatic positioning and support of the rock core to be tested with an irregular shape can be achieved, avoiding processes such as cutting and grinding of the rock core and preventing the measured electrical property results from being distorted due to damage to the original structure of the rock core to be tested.

[0010] The multiple electrically controlled flexible support rods can automatically adjust their heights according to the geometric features of the bottom of the rock core to be tested, ensuring that rock cores of different shapes and sizes can be evenly supported, with strong adaptability and being applicable to a variety of rock core samples.

[0011] A pair of telescopic electrical property testing terminals can accurately align with the geometric axis of the rock core, ensuring good contact in the electrical property testing, thereby improving the accuracy of the test data.

[0012] 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 analyze and output detailed electrical performance test results of the core to be tested based on the test values.

[0013] It can significantly improve the automation level, test accuracy and efficiency of the core electrical performance test, while reducing the operation difficulty and maintenance cost.

[0014] Optionally, it further includes an air inflation and extraction pump, a pressure sensor and a chip-based pressure controller. The air inflation and extraction pump is connected to the inside of the closed test chamber through a pipeline. The pressure sensor monitors the air pressure value inside the closed test chamber. The pressure controller controls the execution action of the air inflation and extraction pump based on the set air pressure value to make the air pressure inside the closed test chamber consistent with the set air pressure value.

[0015] By adopting the above technical solution, the set air pressure value refers to the air pressure value at the sampling location of the core to be tested. By performing electrical performance tests under the same air pressure value, the true electrical performance of the core to be tested can be better reflected.

[0016] Optionally, the electric rotating mechanism is a servo electric turntable, the electric lifting mechanism is a servo electric cylinder, and the electric control flexible support rod is a servo electric rod.

[0017] By adopting the above technical solution, the servo electric turntable can achieve high-precision rotation action control, the servo electric cylinder can achieve high-precision lifting control, and the servo electric rod can achieve high-precision position adjustment.

[0018] Optionally, the visual analysis module includes a visual camera, a memory and a visual analysis chip. The visual camera is installed at the camera mounting groove of the support bottom plate, and the lens faces upward. The memory is communicatively connected to the visual camera, and the visual analysis chip is communicatively connected to the memory.

[0019] By adopting the above technical solution, the visual analysis chip can analyze and obtain the bottom geometric features of the core to be tested based on the bottom visual image interacted with the memory. Specifically, the visual analysis chip processes the bottom visual image using the following specific solutions:

[0020] Convert the color image to a grayscale image to reduce computational complexity. Image filtering: Apply Gaussian filtering or median filtering to remove noise. Use Sobel or Canny operators to enhance the core edge.

[0021] Use the Canny edge detection algorithm to find the edges in the image. Use the findContours method to extract the edge contours. Screen out the main contours representing the bottom of the core according to the size and shape of the contours.

[0022] Calculate the geometric features of the screened contours, such as area, perimeter, centroid, moment of inertia, etc.

[0023] Find the smallest 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. Based on the smallest circumscribed circle or the convex hull, determine the position of the support points.

[0024] Optionally, the support device controller includes a buffer, an instruction chip, and a main control chip. The buffer is communicatively connected to the vision analysis chip, and the instruction chip is communicatively connected to the buffer, respectively generating control instructions for controlling the electric rotation mechanism, the electric lifting mechanism, and multiple electro-controlled flexible support rods. The main control chip communicates and interacts with the instruction chip for control instructions, and respectively controls the execution actions of the electric rotation mechanism, the electric lifting mechanism, and multiple electro-controlled flexible support rods based on the control instructions.

[0025] Optionally, the telescopic electrical property 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 the 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 at the other end of the spring rod and is electrically connected to the electrical property test control circuit board. When the electric telescopic rods of a pair of telescopic electrical property test terminals extend, a pair of test terminals respectively press against both ends of the core to be tested.

[0026] By adopting the above technical solution, when the electric telescopic rods of a pair of telescopic electrical property test terminals both extend, a pair of test terminals respectively abut against both ends of the core to be tested, and under the action of the spring rod, a pair of test terminals are reliably connected to both ends of the core to be tested.

[0027] Optionally, the electrical property test control circuit board includes a circuit board, a test signal generation circuit, a measurement circuit, a data acquisition circuit, and an interface circuit. The test signal generation circuit, the measurement circuit, the data acquisition circuit, and the interface circuit are integrated on the circuit board. The test signal output terminal of the test signal generation circuit is respectively electrically connected to a pair of telescopic electrical property test terminals. The measurement circuit is respectively electrically connected to a pair of telescopic electrical property test terminals for measuring voltage and current. The data acquisition circuit is electrically connected to the measurement circuit to acquire electrical property test data. The interface circuit is communicatively connected to the data acquisition circuit and is communicatively connected to the electrical property analysis module.

[0028] By adopting the above technical solution, the test signal generation circuit generates the required test signals (such as DC voltage, AC voltage, or pulse signals). The measurement circuit includes a current measurement circuit, a voltage measurement circuit, an oscilloscope circuit, etc., for measuring the voltage between the electrodes and the current passing through the core.

[0029] It is used to convert the analog signal into a digital signal for easy analysis and processing. The interface circuit is used to communicate and interact data with external devices.

[0030] Optionally, the electrical property analysis module includes a data memory and a data analysis computer. The data memory is communicatively connected to the interface circuit, and the data analysis computer is communicatively connected to the data memory. The data analysis computer analyzes the electrical property test results of the core to be tested based on a deep learning algorithm.

[0031] A method for testing the electrical properties of a core uses a device for testing the electrical properties of a core to test the electrical properties of the core to be tested, including the following steps:

[0032] Step 1: Open the closed test box body. The support device controller controls the piston rods of the four electro-controlled flexible support rods at the four corners to be at the maximum stroke, and place the core to be tested on the piston rods of the four electro-controlled flexible support rods.

[0033] Step 2: The vision camera captures the bottom vision image of the core to be tested. The vision analysis chip analyzes the bottom geometric features of the core to be tested based on the bottom vision image, and obtains the support point heights of the multiple electro-controlled flexible support rods corresponding to the bottom of the core to be tested based on the geometric feature analysis. The vision analysis chip interacts with the support device controller for the vision analysis results.

[0034] Step 3: The instruction chip generates control instructions for controlling the electric rotation mechanism, the electric lifting mechanism, and the multiple electro-controlled flexible support rods respectively. The main control chip controls the execution actions of the electric rotation mechanism, the electric lifting mechanism, and the multiple electro-controlled flexible support rods respectively based on the control instructions, so that the bottom of the core to be tested is evenly supported and both ends are aligned with a pair of telescopic electrical property test terminals.

[0035] Step 4: Close the closed test box body, set the test air pressure value. The pressure controller controls the execution action of the air charging and pumping pump based on the set air pressure value so that the air pressure in the closed test box body is consistent with the set air pressure value, and the air pressure value is the corresponding air pressure value at the core mining position to be tested.

[0036] Step 5: The electric telescopic rods of a pair of telescopic electrical property test terminals extend, and the pair of test terminals respectively abut against both ends of the core to be tested.

[0037] Step 6: The test signal generation circuit of the electrical property test control circuit board generates an electrical property test signal.

[0038] Step 7: The data analysis computer collects the measured voltage and current of the electrical property test control circuit board and outputs the electrical property test results of the core to be tested.

[0039] Optionally, in Step 6, the electrical property test results of the core to be tested are: resistivity, conductivity, impedance, and current-voltage characteristic curve.

[0040] In summary, the present invention includes at least one of the following beneficial technical effects:

[0041] The present invention can provide a device and method for testing the electrical properties of rock cores. Through a rotating and lifting flexible support device and a support device controller based on a chip, automatic positioning and support of irregularly shaped rock cores to be tested can be achieved, avoiding processes such as cutting and grinding of the rock cores, and preventing the distortion of the measured electrical property results caused by damaging the original structure of the rock cores to be tested.

[0042] Multiple electronically controlled flexible support rods automatically adjust their heights according to the geometric characteristics of the bottom of the rock core to be tested, ensuring that rock cores of different shapes and sizes can be evenly supported, with strong adaptability and applicability to a variety of rock core samples.

[0043] A pair of telescopic electrical property test terminals can accurately align with the geometric axis of the rock core, ensuring good contact during the electrical property test, thereby improving the accuracy of the test data.

[0044] The combination of the electrical property test control circuit board and the electrical property analysis module can collect voltage and current data in real time, and analyze and output detailed electrical property test results of the rock core to be tested based on the test values.

[0045] It can significantly improve the automation level, test accuracy and efficiency of the rock core electrical property test, while reducing the operation difficulty and maintenance cost. Description of the Drawings

[0046] Figure 1 It is a schematic diagram of the internal structural principle of the test state of a rock core electrical property test device of the present invention;

[0047] Figure 2 It is a schematic diagram of the electrical component connection principle of the support device controller controlling the rotating and lifting flexible support device of a rock core electrical property test device of the present invention

[0048] Figure 3 It is a schematic diagram of the communication connection between the electrical property analysis module and the electrical property test device of a rock core electrical property test device of the present invention.

[0049] Description of the Reference Numerals: 1, closed test box; 21, electric rotating mechanism; 22, electric lifting mechanism; 23, support bottom plate; 24, electronically 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 property test terminal; 511, electric telescopic rod; 512, spring rod; 513, test terminal; 52, electrical property test control circuit board; 521, circuit substrate; 522, test signal generation circuit; 523, measurement circuit; 524, data acquisition circuit; 525, interface circuit; 6, electrical property analysis module; 61, data memory; 62, data analysis computer; 71, air inflation and extraction pump; 100, rock core to be tested. Specific Embodiment

[0050] The present invention will be further described in detail below with reference to the accompanying drawings.

[0051] An embodiment of the present invention discloses a device and method for testing the electrical properties of rock cores.

[0052] Refer to Figures 1 - 3 , Embodiment 1, a device for testing the electrical properties of rock cores, comprising a closed test box 1, a rotary lifting flexible support device, a visual analysis module 3, a support device controller 4 based on a chip, an electrical property test device, and an electrical property analysis module 6. The rotary lifting flexible support device includes an electric rotary mechanism 21, an electric lifting mechanism 22, a support bottom plate 23, and multiple electronically controlled flexible support rods 24. The base of the electric rotary 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 rotary mechanism 21. The bottom of the support 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 support bottom plate 23 is provided with multiple flexible support rod mounting grooves and a camera mounting groove. The bottoms of the multiple electronically controlled flexible support rods 24 are respectively installed at the multiple 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 image of the rock core 100 to be tested, and analyze the bottom geometric features of the rock core 100 to be tested based on the bottom visual image. Based on the geometric feature analysis, the support point heights of the multiple electronically controlled flexible support rods 24 corresponding to the bottom of the rock core 100 to be tested are obtained. The visual analysis module 3 interacts with the support device controller 4 to output the visual analysis result. The support device controller 4 generates control instructions for respectively controlling the multiple electronically controlled flexible support rods 24, and respectively controls the multiple electronically controlled flexible support rods 24 to adjust the height so that the bottom of the rock core 100 to be tested is evenly supported. The electrical property test device includes a pair of telescopic electrical property test terminals 51 and an electrical property test control circuit board 52. The pair of telescopic electrical property test terminals 51 are respectively installed on the inner wall of the closed test box 1 and are respectively electrically connected to the test output terminals of the electrical property test control circuit board 52. The support device controller 4 respectively controls the actions of the electric rotary mechanism 21 and the electric lifting mechanism 22 so that the two ends of the geometric axis of the rock core 100 to be tested with evenly supported bottom are directly opposite to the pair of telescopic electrical property test terminals 51 of the electrical property test device. The electrical property analysis module 6 is communicatively connected to the electrical property test control circuit board 52, and analyzes and outputs the electrical property test result of the rock core 100 to be tested based on the test value.

[0053] Through the rotary lifting flexible support device and the support device controller based on a chip, automatic positioning and support of the rock core 100 to be tested with an irregular shape can be realized, avoiding processes such as cutting and grinding of the rock core, and avoiding distortion of the measured electrical property results caused by damage to the original structure of the rock core 100 to be tested;

[0054] Multiple electronically controlled flexible support rods 24 can automatically adjust their heights according to the geometric characteristics of the bottom of the core 100 to be tested, ensuring that cores of different shapes and sizes can be evenly supported, with strong adaptability and being applicable to a variety of core samples.

[0055] A pair of telescopic electrical property test terminals 51 can accurately align with the geometric axis of the core, ensuring good contact for electrical property testing, thereby improving the accuracy of test data.

[0056] The combination of the electrical property test control circuit board 52 and the electrical property analysis module 6 can collect voltage and current data in real time and analyze and output detailed electrical property test results of the core 100 to be tested based on the test values.

[0057] It can significantly improve the automation level, test accuracy and efficiency of core electrical property testing, while reducing the operation difficulty and maintenance cost.

[0058] Embodiment 2 further includes an air inflation and extraction pump 71, a pressure sensor and a chip-based pressure controller. The air inflation and extraction pump 71 is connected to the inside of the closed test chamber 1 through a pipeline. The pressure sensor monitors the air pressure value inside the closed test chamber 1, and the pressure controller controls the execution action of the air inflation and extraction pump 71 based on the set air pressure value to make the air pressure inside the closed test chamber 1 consistent with the set air pressure value.

[0059] The set air pressure value refers to the air pressure value at the sampling location of the core 100 to be tested. By performing electrical property tests under the same air pressure value, the true electrical properties of the core 100 to be tested can be better reflected.

[0060] In specific applications, the closed test chamber 1 can be a box with an openable top. When the top is closed, the air pressure inside the closed test chamber 1 can be accurately adjusted by inflating or extracting air through the air inflation and extraction pump 71.

[0061] In Embodiment 3, the electric rotating mechanism 21 is a servo electric turntable, the electric lifting mechanism 22 is a servo electric cylinder, and the electronically controlled flexible support rod 24 is a servo electric rod.

[0062] 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.

[0063] In 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 at the camera mounting groove of the support 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.

[0064] 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:

[0065] 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.

[0066] 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.

[0067] Calculate the geometric features of the filtered contours, such as area, perimeter, center of mass, moment of inertia, etc.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Example 7. The electrical performance test control circuit board 52 includes a circuit substrate 521, a test signal generation circuit 522, a measurement circuit 523, a data acquisition circuit 524, and an interface circuit 525. The test signal generation circuit 522, the measurement circuit 523, the data acquisition circuit 524, and the interface circuit 525 are integrated on the circuit substrate 521. The test electrical signal output terminals of the test signal generation circuit 522 are respectively electrically connected to a pair of telescopic electrical performance test terminals 51. The measurement 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 measurement circuit 523 to acquire 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.

[0073] The test signal generation circuit 522 generates the required test signals (such as DC voltage, AC voltage, or pulse signals). The measurement circuit 523 includes a current measurement circuit, a voltage measurement circuit, an oscilloscope circuit, etc., for measuring the voltage between the electrodes and the current passing through the core.

[0074] It is used to convert analog signals into digital signals for easy analysis and processing. The interface circuit 525 is used to communicate and interact with external devices for data.

[0075] Example 8. The electrical performance analysis module 6 includes a data memory 61 and a data analysis computer 62. The data memory 61 is communicatively connected to the interface circuit 525. The data analysis computer 62 is communicatively connected to the data memory 61. The data analysis computer 62 analyzes the electrical performance test results of the core 100 to be tested based on a deep learning algorithm.

[0076] Example 9. A method for testing the electrical performance of a core. A device for testing the electrical performance of a core is used to test the electrical performance of the core 100 to be tested, including the following steps:

[0077] Step 1. Open the closed test box 1. The support device controller 4 controls the piston rods of the four electro-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 electro-controlled flexible support rods 24.

[0078] Step 2. The vision camera 31 captures the bottom vision image of the core 100 to be tested. The vision analysis chip 33 analyzes the bottom geometric features of the core 100 to be tested based on the bottom vision image, and analyzes the support point heights of the multiple electro-controlled flexible support rods 24 corresponding to the bottom of the core 100 to be tested based on the geometric features. The vision analysis chip 33 interacts the vision analysis results with the support device controller 4.

[0079] Step 3: The instruction chip 42 respectively generates control instructions for the electric rotating mechanism 21, the electric lifting mechanism 22 and multiple electric control flexible support rods 24. The main control chip 43 respectively controls the execution actions of the electric rotating mechanism 21, the electric lifting mechanism 22 and multiple electric control flexible support rods 24 based on the control instructions, so that the bottom of the core 100 to be tested is evenly supported, and both ends are aligned with a pair of telescopic electrical property test terminals 51.

[0080] Step 4: Close the closed test box 1, set the test air pressure value. The pressure controller controls the execution action of the air inflation and 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.

[0081] Step 5: The electric telescopic rods 511 of a pair of telescopic electrical property test terminals 51 extend, and a pair of test terminals 513 respectively abut against both ends of the core 100 to be tested.

[0082] Step 6: The test signal generation circuit 522 of the electrical property test control circuit board 52 generates an electrical property test signal.

[0083] Step 7: The data analysis computer 62 collects the measured voltage and current of the electrical property test control circuit board 52, and outputs the electrical property test results of the core 100 to be tested.

[0084] 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.

[0085] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within 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.

Images