Resistance testing device under controllable pressure and temperature

Abstract

The invention relates to a resistance testing device under controllable pressure and temperature, which belongs to the technical field of testing devices, and comprises a fixing bracket for fixing and supporting; a pressurizing device is mounted on the fixed bracket so as to provide controllable pressure; the high-precision digital display pressure meter is connected with the pressurizing device so as to measure and display the pressure applied to the sample; the tail end of the high-precision digital display pressure gauge is connected with a red copper gold-plated upper electrode through a ceramic insulating base; a red copper gold-plated lower electrode fixed on the fixed bracket through the ceramic insulating base is correspondingly arranged right below the red copper gold-plated upper electrode; the red copper gold-plated upper electrode and the red copper gold-plated lower electrode are connected to an ultrahigh-precision resistance meter; and the temperature control module is connected with the red copper gold-plated upper electrode and the red copper gold-plated lower electrode through the ceramic insulating base so as to provide controllable temperature. According to the invention, accurate resistance measurement can be provided, the detection precision is high, and an important guiding effect is provided for the application of materials.

Description

Technical Field

[0001] The invention belongs to the technical field of testing devices, and in particular relates to a resistance testing device under controllable pressure and temperature. Background Art

[0002] At present, in the process of testing the resistance of materials, servo motors and single-chip microcomputers are usually used to accurately control the program, so as to apply stable pressure to the measurement sample to measure the resistance of the sample under different pressures. At the same time, during the experiment, a stable ambient temperature is applied to the measurement sample through hot and cold output to measure the resistance of the sample at different temperatures. However, with the in-depth study of the use of materials, such as alloys, ceramics, carbon, polymer composites, etc., there is currently no corresponding test device for the resistance change of samples under controllable pressure and temperature. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a resistance testing device under controllable pressure and temperature, which can accurately measure the resistance of a sample and provide important guidance for the application of materials.

[0004] A resistance testing device under controllable pressure and temperature, comprising a fixed bracket for fixing and supporting; a pressurizing device is installed on the fixed bracket to provide controllable pressure; a high-precision digital pressure gauge is connected to the pressurizing device to measure and display the pressure applied to the sample; the end of the high-precision digital pressure gauge is connected to a copper gold-plated upper electrode through a ceramic insulating base, a copper gold-plated lower electrode is correspondingly arranged directly below the copper gold-plated upper electrode, and the copper gold-plated lower electrode is fixed to the fixed bracket through the ceramic insulating base; the copper gold-plated upper electrode and the copper gold-plated lower electrode are provided with electrode connecting wires, which are connected to the electrode interface of an ultra-high-precision resistance meter by plugging and unplugging; the copper gold-plated upper electrode and the copper gold-plated lower electrode are used to contact the sample between the two to generate a loop to measure the resistance of the sample itself;

[0005] The resistance testing device also includes a temperature control module, which is connected through a ceramic insulating base, a copper gold-plated upper electrode and a copper gold-plated lower electrode to provide a controllable temperature.

[0006] The fixing bracket is made of stainless steel.

[0007] The high-precision digital pressure gauge and ultra-high-precision resistance meter both have a liquid crystal display screen.

[0008] Contact surfaces are arranged on the corresponding sides of the gold-plated copper upper electrode and the gold-plated copper lower electrode.

[0009] The resistance of the sample is measured by a four-terminal electrode method between the gold-plated copper upper electrode and the gold-plated copper lower electrode and an ultra-high precision resistance meter.

[0010] The sizes of the gold-plated copper lower electrode and the gold-plated copper upper electrode are changed according to the size of the sample resistor.

[0011] The pressurizing device comprises a servo motor, the servo motor is fixed on a fixed bracket, a movable guide rail is fixed on an output end of the servo motor, and a high-precision digital pressure gauge is fixed to the movable guide rail.

[0012] The resistance testing device also includes a controller for touch-controlled temperature control and pressure adjustment, which is electrically connected to a servo motor, a high-precision digital pressure gauge, a stroke digital scale, an upper electrode sample temperature control module, and a lower electrode sample temperature control module.

[0013] The controller has a built-in overpressure alarm function. When the pressure displayed by the high-precision digital pressure gauge received by the controller exceeds the critical pressure value that the measured sample can withstand or exceeds the maximum value of the high-precision digital pressure gauge, an alarm will be sounded through a buzzer.

[0014] The resistance testing device also includes an emergency stop device fixedly arranged on a fixed bracket, and when encountering an emergency, the emergency stop device can be pressed urgently.

[0015] The beneficial effects of the present invention are as follows: the present invention detects the resistance of samples of different sizes and under different pressures and temperatures by replacing different copper gold-plated electrode devices and temperature control modules, has good test effect, high sensitivity, and convenient testing, can provide accurate resistance measurement, has high detection accuracy, and provides important guidance for the application of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of a resistance testing device under controllable pressure and temperature provided in Example 1 of the present invention;

[0017] Figure 2 A left side view of the resistance testing device under controllable pressure and temperature provided in Example 1 of the present invention;

[0018] Figure 3 A right side view of the resistance testing device under controllable pressure and temperature provided in Example 1 of the present invention;

[0019] Figure 4 A rear view of the resistance testing device under controllable pressure and temperature provided in Example 1 of the present invention;

[0020] Figure 5 A top view of a resistance testing device under controllable pressure and temperature provided in Example 1 of the present invention;

[0021] Figure 6 A front view of a resistance testing device under controllable pressure and temperature provided in Example 2 of the present invention;

[0022] Figure 7 A left side view of a resistance testing device under controllable pressure and temperature provided in Example 2 of the present invention;

[0023] Figure 8 A right side view of a resistance testing device under controllable pressure and temperature provided in Example 2 of the present invention;

[0024] in:

[0025] 1-stroke digital display scale, 2-high-precision digital display pressure gauge, 3-ultra-high-precision resistance meter, 4-first upper ceramic insulating base, 5-first lower ceramic insulating base, 6-controller, 7-servo motor, 8-upper electrode sample temperature control module, 9-second upper ceramic insulating base, 10-gold-plated copper upper electrode, 11-lower electrode sample temperature control module, 12-second lower ceramic insulating base, 13-gold-plated copper lower electrode, 14-emergency stop device, 15-moving guide rail. DETAILED DESCRIPTION

[0026] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0027] Example 1

[0028] like Figure 1-Figure 5 As shown, a resistance test device under controllable pressure and temperature includes a fixed bracket, a stroke digital scale 1, a high-precision digital pressure gauge 2, an ultra-high precision resistance meter 3, a copper gold-plated upper electrode 10, a copper gold-plated lower electrode 13, a first upper ceramic insulating base 4 and a first lower ceramic insulating base 5. The fixed bracket is made of 316 stainless steel, and the high-precision digital pressure gauge 2 and the ultra-high precision resistance meter 3 both have a liquid crystal display. The fixed bracket plays a fixing and supporting role, and a pressurizing device is installed on the fixed bracket. The high-precision digital pressure gauge 2 is connected to the pressurizing device to measure and display the pressure applied to the sample. The end of the high-precision digital pressure gauge 2 is connected to a copper gold-plated upper electrode 10 through a first upper ceramic insulating base 4, and the first upper ceramic insulating base 4 is tightly connected to the copper gold-plated upper electrode 10 through screws; a copper gold-plated lower electrode 13 is correspondingly arranged directly below the copper gold-plated upper electrode 10, and the copper gold-plated lower electrode 13 is fixed to the fixed bracket through the first lower ceramic insulating base 5, and the copper gold-plated lower electrode 13 is tightly connected to the first lower ceramic insulating base 5 through screws. The first upper ceramic insulating base 4 is fixed to the end of the high-precision digital pressure gauge 2 through screws, and a slider is provided below the first lower ceramic insulating base 5, which is fixed to the sample stage of the fixed bracket through screws to ensure that the sample stage remains stable, and at the same time ensure the stability of the two electrodes when zeroing calibration is performed before testing the resistance and when the inherent internal resistance between the two electrodes is tested.

[0029] The gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with contact surfaces on the corresponding sides, and the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with electrode connection wires, which are connected to the electrode interface of the ultra-high precision resistance meter 3 by plugging and unplugging. The resistance of the sample is measured by the four-terminal electrode method between the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 and the ultra-high precision resistance meter 3, and the measured resistance can be controlled and monitored by a computer in real time through the RS-232C serial port data line.

[0030] The sample to be measured is placed between the gold-plated copper lower electrode 13 and the gold-plated copper upper electrode 10, and the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are in contact with the sample to generate a circuit to measure the resistance of the sample itself. The resistance of samples of different sizes can be measured by replacing different gold-plated copper lower electrodes 13 and gold-plated copper upper electrodes 10, so that the length, width and height of the sample can be adjusted within a certain range.

[0031] The pressurizing device includes a servo motor 7, which is fixed on a fixed bracket, a movable guide rail 15 is fixed on the output end of the servo motor 7, and a high-precision digital pressure gauge 2 is fixed to the movable guide rail 15. The servo motor 7 is a linear motor, and the servo motor 7 drives the movable guide rail 15 to move downward, thereby applying pressure to the sample.

[0032] The resistance test device also includes a controller 6 for pressure control by touch. The controller 6 is a PLC touch temperature control pressure controller, which is electrically connected to the servo motor 7, the high-precision digital pressure gauge 2, and the stroke digital scale 1. The controller 6 is provided with two self-reset buttons, start and close, which are used to power on and off.

[0033] The controller 6 is provided with a display touch screen and buttons, and test parameters are programmed through the buttons and the display touch screen; at the same time, the controller 6 has a built-in overpressure alarm function. When the pressure displayed by the high-precision digital pressure gauge 2 received by the controller 6 exceeds the critical pressure value that the measured sample can withstand or exceeds the maximum value of the high-precision digital pressure gauge 2, an alarm will be sounded through a buzzer, and the pressure will be reduced to ensure that the equipment is not damaged.

[0034] The resistance testing device further comprises an emergency stop device 14 fixedly arranged on a fixed bracket. When an emergency occurs, such as a failure of a pressurizing device and the test must be terminated, the emergency stop device 14 can be pressed urgently to terminate the test process.

[0035] In this embodiment, only pressure is considered, and temperature change is not considered, and the temperature is room temperature. When working, the required force is preset by the controller 6, and a working instruction is issued to the servo motor 7 to control the servo motor 7 to perform a downward movement, and the real-time pressure is displayed by the high-precision digital pressure gauge 2, and the stroke digital scale 1 can display the stroke of the servo motor 7 in real time. When the controller 6 detects that the pressure displayed by the high-precision digital pressure gauge 2 reaches the preset force, the servo motor 7 stops working, and the resistance of the current sample is checked by the ultra-high precision resistance meter 3.

[0036] In order to effectively obtain the variation law of the resistance of the test sample and the applied pressure, when the ultra-high precision resistance meter 3 detects the resistance of the sample between the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13, the controller 6 is used to adjust the pressure change, so as to observe the change of the sample resistance. For example, in this embodiment, a pressure range of 1N-1000N can be provided, and the controller 6 is used to adjust the pressure change within the range of 1N-1000N, and the time point is set for recording, and the pressure is increased by 1N every 1 second, and the sample resistance is tested and recorded once, and the variation law of the sample resistance in the range of 1nΩ-1200MΩ is observed.

[0037] Example 2

[0038] like Figure 6-Figure 8As shown, a resistance testing device under controllable pressure and temperature includes a fixed bracket, a stroke digital scale 1, a high-precision digital pressure gauge 2, an ultra-high precision resistance meter 3, a copper gold-plated upper electrode 10, a copper gold-plated lower electrode 13, a first upper ceramic insulating base 4 and a first lower ceramic insulating base 5. The fixed bracket is made of 316 stainless steel, and the high-precision digital pressure gauge 2 and the ultra-high precision resistance meter 3 both have a liquid crystal display. A pressurizing device is installed on the fixed bracket, and the high-precision digital pressure gauge 2 is connected to the pressurizing device to measure and display the pressure applied to the sample. The end of the high-precision digital pressure gauge 2 is connected to a copper gold-plated upper electrode 10 through a first upper ceramic insulating base 4 and a second upper ceramic insulating base 9, an upper electrode sample temperature control module 8 is arranged between the first upper ceramic insulating base 4 and the second upper ceramic insulating base 9, and the second upper ceramic insulating base 9 is tightly connected to the copper gold-plated upper electrode 10 through screws; a copper gold-plated lower electrode 13 is arranged correspondingly below the copper gold-plated upper electrode 10, and the copper gold-plated lower electrode 13 is fixed to a fixed bracket through the second lower ceramic insulating base 12 and the first lower ceramic insulating base 5, a lower electrode sample temperature control module 11 is arranged between the second lower ceramic insulating base 12 and the first lower ceramic insulating base 5, and the copper gold-plated lower electrode 13 is tightly connected to the first lower ceramic insulating base 5 through screws. The first upper ceramic insulating base 4 is fixed to the end of the high-precision digital pressure gauge 2 by screws, and a slider is provided under the first lower ceramic insulating base 5, which is fixed to the sample stage of the fixed bracket by screws to ensure that the sample stage remains stable and ensure the stability of the two electrodes when zeroing calibration is performed before testing the resistance and when testing the inherent internal resistance between the two electrodes.

[0039] The upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 adopt PID temperature control modules to provide a heating environment or a cooling environment for the test.

[0040] The gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with contact surfaces on the corresponding sides, and the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with electrode connection wires, which are connected to the electrode interface of the ultra-high precision resistance meter 3 by plugging and unplugging. The resistance of the sample is measured by the four-terminal electrode method between the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 and the ultra-high precision resistance meter 3, and the measured resistance can be controlled and monitored by a computer in real time through the RS-232C serial port data line.

[0041] The sample to be measured is placed between the copper gold-plated lower electrode 13 and the copper gold-plated upper electrode 10, and the copper gold-plated upper electrode 10 and the copper gold-plated lower electrode 13 are used to contact the sample to generate a circuit to measure the resistance of the sample itself. The resistance of samples 1 of different sizes can be measured by replacing different copper gold-plated lower electrodes 13, copper gold-plated upper electrodes 10, upper electrode sample temperature control modules 8 and lower electrode sample temperature control modules 11, so that the length, width and height of the sample can be adjusted within a certain range.

[0042] The pressurizing device includes a servo motor 7, which is fixed on a fixed bracket. A movable guide rail 15 is fixed on the output end of the servo motor 7. A high-precision digital pressure gauge 2 is fixed to the movable guide rail 15. The servo motor 7 drives the movable guide rail 15 to move downward, thereby applying pressure to the sample.

[0043] The resistance test device also includes a controller 6 for touch control for temperature control. The controller 6 is a PLC touch temperature control pressure controller, which is electrically connected to the upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11. The controller 6 is provided with two self-reset buttons, start and close, which are used to power on and off.

[0044] The controller 6 is provided with a display touch screen and buttons, and the test parameters are programmed through the buttons and the display touch screen. The resistance test device also includes an emergency stop device 14 fixedly arranged on a fixed bracket. When an emergency occurs, such as a failure of the pressurizing device, the emergency stop device 14 can be pressed urgently to terminate the test process.

[0045] This embodiment only considers temperature, not pressure changes. During operation, the upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 are started by the controller 6, the required temperature is preset and heating is performed, and the controller 6 displays the preset temperature and the current temperature. When the controller 6 detects that the upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 have reached the preset temperature, it starts to keep warm, and the resistance of the current sample is checked by the ultra-high precision resistance meter 3.

[0046] In order to effectively obtain the variation law of the resistance of the test sample and the applied temperature, when the ultra-high precision resistance meter 3 detects the resistance of the sample between the copper gold-plated upper electrode 10 and the copper gold-plated lower electrode 13, the temperature change is adjusted by the controller 6, and the temperature control module 8 is used to heat or cool, so as to observe the variation of the resistance of the sample. For example, in this embodiment, the temperature variation range is adjusted by the controller 6 to 0-200°C, and the time point is set for recording, and the temperature is increased by 10°C every 1 minute, and the sample resistance is tested and recorded once, and the variation law of the sample resistance in the range of 1nΩ-1200MΩ is observed.

[0047] Example 3

[0048] like Figure 6-Figure 8 As shown, a resistance testing device under controllable pressure and temperature includes a fixed bracket, a stroke digital scale 1, a high-precision digital pressure gauge 2, an ultra-high precision resistance meter 3, a copper gold-plated upper electrode 10, a copper gold-plated lower electrode 13, a first upper ceramic insulating base 4 and a first lower ceramic insulating base 5. The fixed bracket is made of 316 stainless steel, and the high-precision digital pressure gauge 2 and the ultra-high precision resistance meter 3 both have a liquid crystal display. A pressurizing device is installed on the fixed bracket, and the high-precision digital pressure gauge 2 is connected to the pressurizing device to measure and display the pressure applied to the sample. The end of the high-precision digital pressure gauge 2 is connected to a copper gold-plated upper electrode 10 through a first upper ceramic insulating base 4 and a second upper ceramic insulating base 9, an upper electrode sample temperature control module 8 is arranged between the first upper ceramic insulating base 4 and the second upper ceramic insulating base 9, and the second upper ceramic insulating base 9 is tightly connected to the copper gold-plated upper electrode 10 through screws; a copper gold-plated lower electrode 13 is arranged correspondingly below the copper gold-plated upper electrode 10, and the copper gold-plated lower electrode 13 is fixed to a fixed bracket through the second lower ceramic insulating base 12 and the first lower ceramic insulating base 5, a lower electrode sample temperature control module 11 is arranged between the second lower ceramic insulating base 12 and the first lower ceramic insulating base 5, and the copper gold-plated lower electrode 13 is tightly connected to the first lower ceramic insulating base 5 through screws. The first upper ceramic insulating base 4 is fixed to the end of the high-precision digital pressure gauge 2 by screws, and a slider is provided under the first lower ceramic insulating base 5, which is fixed to the sample stage of the fixed bracket by screws to ensure that the sample stage remains stable and ensure the stability of the two electrodes when zeroing calibration is performed before testing the resistance and when testing the inherent internal resistance between the two electrodes.

[0049] The upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 adopt PID temperature control modules to provide a heating environment or a cooling environment for the test.

[0050] The gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with contact surfaces on the corresponding sides, and the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 are provided with electrode connection wires, which are connected to the electrode interface of the ultra-high precision resistance meter 3 by plugging and unplugging. The resistance of the sample is measured by the four-terminal electrode method between the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 and the ultra-high precision resistance meter 3, and the measured resistance can be controlled and monitored by a computer in real time through the RS-232C serial port data line.

[0051] The measured sample is placed between the copper gold-plated lower electrode 13 and the copper gold-plated upper electrode 10, and the copper gold-plated upper electrode 10 and the copper gold-plated lower electrode 13 are used to contact the sample to generate a circuit to measure the resistance of the sample itself. The resistance of samples of different sizes can be measured by replacing different copper gold-plated lower electrodes 13, copper gold-plated upper electrodes 10, upper electrode sample temperature control modules 8 and lower electrode sample temperature control modules 11, so that the length, width and height of the sample can be adjusted within a certain range.

[0052] The pressurizing device includes a servo motor 7, which is fixed on a fixed bracket. A movable guide rail 15 is fixed on the output end of the servo motor 7. A high-precision digital pressure gauge 2 is fixed to the movable guide rail 15. The servo motor 7 drives the movable guide rail 15 to move downward, thereby applying pressure to the sample.

[0053] The resistance test device also includes a controller 6 for touch control of temperature and pressure. The controller 6 is a PLC touch temperature and pressure controller, which is electrically connected to a servo motor 7, a high-precision digital pressure gauge 2, a stroke digital scale 1, an upper electrode sample temperature control module 8, and a lower electrode sample temperature control module 11. The controller 6 is provided with two self-reset buttons, start and close, and power on and off are completed by the self-reset buttons.

[0054] The controller 6 is provided with a display touch screen and buttons, and test parameters are programmed through the buttons and the display touch screen; at the same time, the controller 6 has a built-in overpressure alarm function. When the pressure displayed by the high-precision digital pressure gauge 2 received by the controller 6 exceeds the critical pressure value that the measured sample can withstand or exceeds the maximum value of the high-precision digital pressure gauge 2, an alarm will be sounded through a buzzer, and the pressure will be reduced to ensure that the equipment is not damaged.

[0055] The resistance testing device further comprises an emergency stop device 14 fixedly arranged on a fixed bracket. When an emergency occurs, such as a failure of a pressurizing device and the test must be terminated, the emergency stop device 14 can be pressed urgently to terminate the test process.

[0056] This embodiment takes both pressure and temperature into consideration. During operation, the controller 6 is used to preset the required force, and a work instruction is issued to the servo motor 7 to control the servo motor 7 to perform a downward movement. The high-precision digital pressure gauge 2 is used to display the real-time pressure, and the stroke digital scale 1 can display the stroke of the servo motor 7 in real time. When the controller 6 detects that the pressure displayed by the high-precision digital pressure gauge 2 reaches the preset force, the servo motor 7 stops working; at the same time, the upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 are started by the controller 6, the required temperature is preset and heated, and the controller 6 displays the preset temperature and the current temperature. When the controller 6 detects that the upper electrode sample temperature control module 8 and the lower electrode sample temperature control module 11 have reached the preset temperature, it starts to keep warm, and then checks the resistance of the current sample through the ultra-high precision resistance meter 3.

[0057] In order to effectively obtain the variation law of the resistance of the test sample with the applied pressure and the applied temperature, when the resistance of the sample between the gold-plated copper upper electrode 10 and the gold-plated copper lower electrode 13 is detected by the ultra-high precision resistance meter 3, the pressure and temperature are adjusted by the controller 6. For example, the pressure increases by 10°C and 100N at the same time every minute, and the sample resistance is tested and recorded once, so as to obtain the variation of the resistance of the sample in the range of 1nΩ-1200MΩ within the pressure range of 1N-1000N and the temperature range of 0-200°C.

Claims

1. A resistance testing device under controllable pressure and temperature, characterized in that: The invention comprises a fixed bracket for fixing and supporting; a pressure device is installed on the fixed bracket to provide controllable pressure; a high-precision digital pressure gauge (2) is connected to the pressure device to measure and display the pressure applied to the sample; the end of the high-precision digital pressure gauge (2) is connected to a copper gold-plated upper electrode (10) through a ceramic insulating base, a copper gold-plated lower electrode (13) is arranged correspondingly directly below the copper gold-plated upper electrode (10), and the copper gold-plated lower electrode (13) is fixed to the fixed bracket through the ceramic insulating base; the copper gold-plated upper electrode (10) and the copper gold-plated lower electrode (13) are provided with electrode connecting wires, which are connected to the electrode interface of the ultra-high-precision resistance meter (3) by plugging and unplugging; the copper gold-plated upper electrode (10) and the copper gold-plated lower electrode (13) are used to contact the sample between the two to generate a loop, so as to measure the resistance of the sample itself; The resistance testing device also includes a temperature control module, which is connected via a ceramic insulating base, a copper-gold-plated upper electrode (10) and a copper-gold-plated lower electrode (13) to provide a controllable temperature.

2. A resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The fixing bracket is made of 316 stainless steel.

3. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The high-precision digital pressure gauge (2) and the ultra-high-precision resistance meter (3) both have a liquid crystal display screen.

4. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: Contact surfaces are provided on the corresponding sides of the gold-plated copper upper electrode (10) and the gold-plated copper lower electrode (13).

5. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The resistance of the sample is measured by a four-terminal electrode method between the gold-plated copper upper electrode (10) and the gold-plated copper lower electrode (13) and an ultra-high precision resistance meter (3).

6. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The sizes of the gold-plated copper lower electrode (13) and the gold-plated copper upper electrode (10) are changed according to the size of the sample resistor.

7. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The pressurizing device comprises a servo motor (7), the servo motor (7) is fixed on a fixed bracket, a movable guide rail (15) is fixed on an output end of the servo motor (7), and a high-precision digital pressure gauge (2) is fixed to the movable guide rail (15).

8. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The resistance testing device also includes a controller (6) for adjusting temperature and pressure by touch control, and is electrically connected to a servo motor (7), a high-precision digital pressure gauge (2), a stroke digital scale (1), an upper electrode sample temperature control module (8), and a lower electrode sample temperature control module (11).

9. The resistance testing device under controllable pressure and temperature according to claim 8, characterized in that: The controller (6) has an overpressure alarm function built in. When the pressure displayed by the high-precision digital pressure gauge (2) received by the controller (6) exceeds the critical pressure value that the measured sample can withstand or exceeds the maximum value of the high-precision digital pressure gauge (2), an alarm will be sounded through a buzzer.

10. The resistance testing device under controllable pressure and temperature according to claim 1, characterized in that: The resistance testing device also includes an emergency stop device (14) fixedly arranged on the fixed bracket. When an emergency occurs, the emergency stop device (14) can be pressed urgently.

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