CN219590085U - Pulling and twisting combined testing device for microscale material - Google Patents
Pulling and twisting combined testing device for microscale material Download PDFInfo
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- CN219590085U CN219590085U CN202222558397.9U CN202222558397U CN219590085U CN 219590085 U CN219590085 U CN 219590085U CN 202222558397 U CN202222558397 U CN 202222558397U CN 219590085 U CN219590085 U CN 219590085U
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Abstract
The utility model discloses a pull-torsion combination testing device for microscale materials, which comprises: the device comprises a micro-force loading mechanism, a micro-force sensor, a torque loading mechanism, a micro-torque sensor, a sample clamping unit and a data acquisition and processing unit. The micro-force sensor is fixed on the left side of the ball screw platform, and the micro-torque sensor is connected with the micro-force sensor; the micro torque sensor comprises a flexible pivot, a light target and a laser displacement sensor; the ball screw is matched with the first stepping motor for use, so that the stretching or compression of the sample is realized; the second stepping motor is fixed on the right side of the ball screw platform and used for realizing torsion loading of the sample; the device can simultaneously and automatically measure the force-displacement and torque-rotation angle of the sample, and has the advantages of high measurement precision, wide application range and good device stability.
Description
Technical Field
The utility model belongs to the field of precision measurement of mechanical properties of microscale materials, and particularly relates to a pull-torsion combined testing device for microscale materials.
Background
With the development of the emerging discipline fields such as micro-electromechanical systems, many micro-scale materials and micro-nano devices are continuously emerging, but the characterization of the mechanical behavior of the micro-scale materials and the micro-nano devices has a certain difficulty. The existing pull-torsion combined testing machine has the defects of low measurement resolution and low precision, and the application range of the existing pull-torsion combined testing machine is greatly limited and cannot be suitable for mechanical behavior characterization of microscale materials.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the utility model provides a tension-torsion combined testing device for a microscale material, which has the advantages of high measurement resolution, high precision, wide application range and the like.
In order to achieve the above object, according to one aspect of the present utility model, there is provided a pull-torsion combination test device for a micro-scale material, comprising: the device comprises a micro-force loading mechanism, a micro-force sensor, a torque loading mechanism, a micro-torque sensor, a sample clamping unit and a data acquisition and processing unit;
the sample clamping unit comprises a first clamp and a second clamp which are parallel to each other and are respectively used for clamping two ends of a sample;
the torque loading mechanism comprises a second stepping motor, and an output shaft of the second stepping motor is connected with a second clamp and is used for applying a torsion angle to the sample;
the micro torque sensor comprises laser displacement sensors I and II and fixing frames I and II thereof, an optical target (9) and a flexible pivot; the end face of the front end of the flexible pivot is fixedly connected with one end of the micro force sensor, and the end face of the rear end of the flexible pivot is fixedly connected with the first clamp; the center point of the optical target is fixed on the side surface of the rear end of the flexible pivot, and the two ends of the optical target are provided with target points; the laser displacement sensors I and II are respectively used for measuring displacement variation of target points at two ends of the optical target;
the micro-force loading mechanism comprises a first stepping motor, a ball screw platform and a sliding table, wherein the second stepping motor is arranged on the sliding table, and the sliding table is connected with the ball screw; the output shaft of the first stepping motor is connected with one end of the ball screw and is used for driving the ball screw to rotate so as to change the length of the ball screw, so that the sliding table and the second stepping motor are driven to generate axial displacement along the ball screw, and axial pulling force or pressure is applied to a sample; the micro force sensor is used for measuring the axial pulling force or the compressive force applied to the sample by the micro force loading mechanism.
The data acquisition and processing unit is used for acquiring the measurement data of the micro force sensor and the laser displacement sensors I and II and calculating the torque of the sample according to the measurement data of the laser displacement sensors I and II.
Preferably, the measured data of the laser displacement sensors I, II and the torque of the sample satisfy the following relation:
Q＝kθ；
where k is the torsional stiffness coefficient of the flexible pivot, θ is the deflection angle of the first clamp, Δx 1 And Deltax 2 And d is the distance between the target points at the two ends of the optical target.
Preferably, the other end of the micro force sensor is fixed at the front end of the ball screw platform through a micro force sensor bracket, and the first motor is installed at the rear end of the ball screw platform.
Preferably, the end face of the front end of the flexible pivot is fixedly connected with the micro force sensor through a first intermediate connecting piece, and the end face of the rear end is fixedly connected with the first clamp through a second intermediate connecting piece.
Preferably, the second stepper motor is fixed on the sliding table through a stepper motor frame.
Preferably, the first clamp and the second clamp are both cylindrical.
Preferably, the data acquisition and processing unit comprises an A/D acquisition card and a computer system; and the measuring signals of the micro force sensor and the laser displacement sensors I and II are respectively acquired through different channels of the A/D acquisition card.
In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:
the tension-torsion combined testing device for the microscale material can simultaneously test the tensile and torsional mechanical properties of the microscale material, has high measurement precision and wide application range; the testing device has high resolution, can more accurately carry out combined measurement on the torsion and tensile mechanical properties of different microscale materials, is simple and convenient to mount and dismount, can reduce the operation difficulty of testing, and ensures the rapid performance of experiments.
Further, the pull-torsion combined testing device for the microscale material provided by the utility model adopts the double-laser displacement sensor to measure the deflection angle of the flexible pivot, and has the advantages of high precision, good stability, convenience in realizing automatic measurement and the like; by replacing flexible pivots of different types, the wide-range measurement of micro-torque of the micro-scale material can be realized.
Further, according to the tension-torsion combined testing device for the microscale material, the second stepping motor is arranged on the sliding table through the stepping motor frame, the micro force sensor is arranged on the micro force sensor support, the support is provided with the up-down displacement sliding groove, and the centering degree of the first clamp and the second clamp can be adjusted by adjusting the positions of the micro force sensor and the stepping motor frame, so that good centering degree is obtained.
Further, according to the tension-torsion combined testing device for the microscale material, provided by the utility model, the torque measuring signal and the micro-force measuring signal of the sample are respectively collected by different channels of the data collecting card, so that unified processing of a computer system is facilitated, and meanwhile, no crosstalk can be realized.
Drawings
FIG. 1 is a schematic diagram of a pull-torsion combination testing device for microscale materials provided by the utility model;
FIG. 2 is a schematic diagram of the structure of a flexible pivot in a pull-torsion combined test device for micro-scale materials provided by the utility model;
FIG. 3 is one of the measurement schematics of the pull-torsion combination test device for microscale materials provided by the utility model;
FIG. 4 is a second measurement schematic diagram of a pull-torsion combination test device for micro-scale materials according to the present utility model.
Fig. 5 is a schematic view of a ball screw platform.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein:
1-a first stepper motor; 2-a ball screw platform; 3-ball screw; 4-a sliding table; 5-a second stepper motor; 6-1-a first clamp; 6-2-a second clamp; 7-a stepper motor frame; 8-1-a laser displacement sensor I; 8-2-laser displacement sensor II; 9-light target; 10-flexible pivots; 11-a micro force sensor; 12-a micro force sensor bracket; 13-1-a laser displacement sensor fixing frame I; 13-2-laser displacement sensor mount II.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The utility model provides a pull-torsion combination testing device for microscale materials, which is shown in figure 1 and comprises: the device comprises a micro-force loading mechanism, a micro-force sensor, a torque loading mechanism, a micro-torque sensor, a sample clamping unit and a data acquisition and processing unit;
the sample clamping unit comprises a first clamp 6-1 and a second clamp 6-2 which are parallel to each other and are respectively used for clamping two ends of a sample;
the torque loading mechanism comprises a second stepping motor 5, and an output shaft of the second stepping motor is connected with a second clamp 6-2 and is used for applying torsion angle to the sample, namely applying torque to the sample to enable the sample to twist.
Preferably, the first clamp 6-1 and the second clamp 6-2 are both cylindrical.
It can be appreciated that the test device provided by the utility model has a measuring object of a micro-scale material, for example: fibers, films, and the like.
One end of the second clamp clamps one end of the sample, the other end of the second clamp is connected with the output shaft of the second stepping motor, and torque applied by the second clamp is transmitted to the sample, so that the sample is twisted.
The micro torque sensor comprises a laser displacement sensor fixing frame I13-1, a laser displacement sensor fixing frame II13-2, a laser displacement sensor I8-1, a laser displacement sensor II 8-2, an optical target 9 and a flexible pivot 10; the laser displacement sensor fixing frames I13-1 and the laser displacement sensor fixing frames II13-2 are symmetrically arranged along the two sides of the ball screw platform 2; the end face of the front end of the flexible pivot 10 is fixedly connected with one end of the micro force sensor 11, and the end face of the rear end of the flexible pivot 10 is coaxially and fixedly connected with the first clamp 6-1; the center point of the light target 9 is fixed on the side surface of the rear end of the flexible pivot 10, and the two ends of the light target 9 are provided with target points; the laser displacement sensor I8-1 and the laser displacement sensor II 8-2 are respectively used for measuring displacement variation of target points at two ends of the optical target 9 when the sample is twisted.
The laser displacement sensor fixing frames I and II are symmetrically arranged along two sides of the ball screw platform 2, and at least two rows of hollow grooves are formed for fixing the laser displacement sensors I and II.
The torque applied to the sample by the second stepper motor 5 is transmitted to the connecting end of the flexible pivot and the first clamp 6-1 through the first clamp 6-1, so that the first clamp 6-1 and the connecting end of the flexible pivot and the first clamp 6-1 rotate at the same angle; the center of the optical target 9 is fixedly connected with the first clamp 6-1, the torque of the sample is transmitted to the flexible pivot by the first clamp 6-1, and the optical target 9 amplifies the torsional deformation of the flexible pivot, namely, the optical target, the first clamp 6-1 and the connecting end of the flexible pivot and the first clamp 6-1 rotate at the same angle.
It will be appreciated by those skilled in the art that as shown in FIG. 2, the flexible pivot includes a front end A, a rear end B, and an elastic tab connecting the front end A and the rear end B; the front end A and the rear end B are coaxially arranged and can rotate freely relative to each other, and torque between the front end A and the rear end B is transmitted through the elastic sheet. Both ends A, B of the flexible pivot can rotate relatively when torque is applied, namely the rotation directions of both ends A, B are opposite; one end of the device can be fixed, and the other end of the device can rotate.
The micro torque sensor is connected with the tension measuring unit (namely the micro force sensor) through a flexible pivot, the end face of the front end A of the flexible pivot is fixed with the micro force sensor, and the end face of the rear end B of the flexible pivot is coaxially fixed with the first clamp of the micro torque sensor.
The first clamp and the second clamp both ends of the sample, and the sample is stretched or compressed by the micro-force loading mechanism and simultaneously is twisted by the torque loading mechanism. The front end of the flexible pivot 10 is completely fixed with the micro force sensor 11, and the rotation cannot occur, the torque applied to the sample is transmitted to the rear end of the flexible pivot 10 by the first clamp 6-1, so that the rear end of the flexible pivot 10 rotates, and the optical target 9 is fixed on the side wall of the rear end of the flexible pivot, therefore, when the rear end of the flexible pivot rotates, the optical target 9 also deflects by the same angle, namely, the deflection angle of the rear end of the flexible pivot is the same as the deflection angle of the optical target 9.
The micro torque measuring element is a flexible pivot 10, the center point of the optical target 9 being fixed on the side of the rear end B of the flexible pivot. The two ends of the optical target 9 are provided with target points, the distance between the two target points is d, the laser displacement sensors I and II are respectively used for measuring displacement variation of the target points at the two ends of the optical target 9 when the sample is twisted, the deflection angle of the optical target 9 can be further calculated according to the displacement variation of the two target points, so that the deflection angle of the flexible pivot 10 (the deflection angles of the two target points are the same) is obtained, and the torsion moment of the sample can be obtained by multiplying the deflection angle and the torsion rigidity of the flexible pivot 10 due to the known torsion rigidity coefficient of the flexible pivot 10.
That is, since the deflection angle of the optical target is the same as the deflection angle of the rear end of the flexible pivot, and the torque of the flexible pivot is the same as the torque of the sample, the deflection angle of the optical target (i.e., the deflection angle of the rear end of the flexible pivot) is measured by the laser displacement sensor, and the torque of the sample can be obtained by multiplying the deflection angle by the torsional rigidity coefficient of the flexible pivot.
The torque loading unit can realize the precise control of the torsion speed and torsion angle of the sample through the first stepping motor.
As shown in fig. 3-4, two sets of laser displacement sensors I, II are respectively placed on two sets of laser displacement sensor fixing frames I, II, so as to facilitate position adjustment, and respectively correspond to the target points on the left side and the right side of the optical target 9, and the distance between the two target points is d. When the optical target deflects, the laser displacement sensor I measures the displacement variation delta x of the target point at the left side of the optical target 1 The laser displacement sensor II measures the displacement conversion quantity Deltax of the target point on the right side of the optical target 2 。
Therefore, the rotation angle θ of the light target and the flexible pivot (i.e., the rotation angle of the rear end of the flexible pivot) is
When θ is small (θ <2 °), it can be approximated as
The torque of the flexible pivot 10 is proportional to its rotation angle θ, and therefore
Q＝kθ (3)
The torsional rigidity coefficient k can be obtained through a calibration experiment, and the torque value applied to the sample can be directly obtained through displacement variation measured by the two laser displacement sensors.
Preferably, the front end surface of the flexible pivot 10 is fixedly connected with the micro force sensor 11 through a first intermediate connecting piece, and the rear end surface is fixedly connected with the first clamp 6-1 through a second intermediate connecting piece.
The micro-force loading mechanism comprises a first motor 1, a ball screw platform 2 and a sliding table 4, wherein the second stepping motor 5 is arranged on the sliding table 4, and the sliding table 4 is connected with the ball screw 3; an output shaft of the first stepper motor 1 is connected with one end of the ball screw 3, and is used for driving the ball screw 3 to rotate so as to change the length of the ball screw, so that the sliding table 4 and the second stepper motor 5 are driven to generate axial displacement along the ball screw, and axial tension or pressure is applied to a sample; one end of the micro force sensor 11 is fixedly connected with the front end of the flexible pivot 10, and the other end of the micro force sensor is fixed at the front end of the ball screw platform 2 through the micro force sensor bracket 12 and is used for measuring the axial pulling force or the pressure applied to the sample by the micro force loading mechanism.
Specifically, as shown in fig. 1 and 5, the ball screw platform adopts the existing ball screw platform, as shown in fig. 5, the ball screw platform comprises a connecting piece C, a ball screw 3, side plates 2 positioned at two sides of the ball screw 3, a bottom plate positioned at the bottom of the ball screw 3, front end plates and rear end plates positioned at the front end and the rear end of the ball screw 3 respectively, the connecting piece C is connected with two side plates, and the two side plates, the front end plates and the rear end plates are all connected with the bottom plate.
As shown in fig. 5, the slide table 4 is connected with the ball screw through a connector C. When the first motor drives the ball screw to rotate, the screw rotates to drive the sliding table to axially displace along the screw (the side plates 2 positioned on two sides of the ball screw 3 are used as sliding rails), so that loading of axial pulling/pressure of a sample is realized.
The data acquisition and processing unit is used for acquiring the measurement data of the micro force sensor and the laser displacement sensors I and II and determining the torque of the sample according to the measurement data of the laser displacement sensors I and II.
Specifically, the data acquisition and processing module is used for acquiring and processing the measurement data of the laser displacement sensors I and II to obtain the deflection angle of the optical target 9 (namely the deflection angle of the rear end of the flexible pivot), so as to further calculate the torque test result of the sample; and collecting and processing an output signal of the micro force sensor to obtain a tensile test result of the sample.
The data acquisition and processing module may also acquire and process the rotational angle applied to the sample by the second stepper motor, the axial displacement applied to the sample by the first stepper motor via the ball screw.
Preferably, the data acquisition and processing unit comprises an A/D acquisition card and a computer system; and the measurement data of the micro force sensor and the measurement data of the laser displacement sensors I and II are respectively acquired through different channels of the A/D acquisition card.
Specifically, the data acquisition and processing module comprises a computer system and an A/D acquisition card. The a input end of the A/D acquisition card is connected with a measuring unit and comprises a laser displacement sensor 13 and a micro force sensor 11, and the laser displacement sensor is used for acquiring data such as axial force, torque and the like of a sample; the input end b of the A/D acquisition card is connected with one end of a servo controller, and the other end of the servo controller is connected with the stepping motors 1 and 5 and used for acquiring and A/D converting the rotation angle and axial displacement of the stepping motors loaded to the sample. The output end of the A/D acquisition card is connected with a computer system, the latter can control the testing device, calculate the flexible pivot angle theta acquired by the A/D acquisition card, the angle phi of the second stepping motor 5 loaded to the sample, the axial displacement l applied by the first stepping motor to the sample and the micro force sensor reading F, and display the torque-angle curve, the axial force-torque curve, the axial force-displacement curve and the like of the sample in real time.
In the testing device provided by the embodiment of the utility model, the torque measuring signal and the micro-force measuring signal of the sample are respectively connected into different channels of the acquisition card, so that the computer system can perform unified processing conveniently and crosstalk can be avoided.
The testing device provided by the utility model is based on an in-situ micro-torsion experimental testing system, and is added with modules such as the micro-force sensor, the ball screw platform and the like, so that the tension-torsion combined test can be carried out on the micro-scale material, and meanwhile, the accurate control of torque-rotation angle and force-displacement of the micro-scale material is realized. By changing different types of flexible pivots, wide range measurement can be achieved.
Preferably, the other end of the micro force sensor 11 is connected to one end of the ball screw platform 2 through a micro force sensor bracket 12, and the first motor is disposed at the other end of the ball screw platform 2.
Specifically, the first stepper motor is disposed at one end of the ball screw platform 2, and the micro force sensor is fixed to the other end of the ball screw platform 2 through the micro force sensor bracket 12.
For example, as shown in fig. 1, the micro force sensor is fixed on the left side of the ball screw platform through a micro force sensor bracket and is connected with the micro torque sensor; the first stepper motor is arranged on the right side of the ball screw platform.
The micro torque sensing device and the micro force sensor are fixed at one end, far away from the motor, of the ball screw platform, so that the interference of motor vibration to the testing process can be reduced, and the testing precision is further improved.
Preferably, the micro force sensor support 12 is provided with a vertical chute, and the other end of the micro force sensor 11 is connected with the micro force sensor support 12 through the vertical chute.
Specifically, the micro force sensor can slide up and down in a vertical chute provided on the micro force sensor bracket for connection with the micro force sensor bracket 12.
Preferably, the vertical chute is arranged in the middle of the micro force sensor bracket.
Preferably, the micro force sensor can also be connected with the micro force sensor bracket through a connecting hole arranged on the micro force sensor bracket, and can slide up and down in the connecting hole.
Preferably, the second stepper motor 5 is arranged on the sliding table 4 by a stepper motor frame 7.
Specifically, in the torque loading unit, the second stepping motor 5 is fixed by a stepping motor frame 7, and the stepping motor frame is fixed to the slide table 4.
In the testing device provided by the embodiment of the utility model, the second stepping motor is arranged on the two-dimensional translation sliding table through the stepping motor frame, the micro force sensor is arranged on the micro force sensor bracket, the middle part of the bracket is provided with the up-down displacement sliding groove, and good centering degree can be obtained by adjusting the positions of the micro force sensor and the stepping motor frame.
The testing device provided by the embodiment of the utility model can be placed on the air cushion vibration isolation table in the use process, so that the interference of external vibration on experiments can be obviously reduced, and the precision of a testing result is further improved.
In conclusion, the device can automatically measure the force-displacement and torque-torsion angle of the sample at the same time, and has the advantages of high measurement accuracy, wide application range and good device stability.
The following describes, with a specific example, specific operation steps of the test device according to the embodiment of the present utility model:
(1) According to the measurement requirement, taking a material sample with a certain length, respectively placing two ends of the sample in a first clamp 6-1 and a second clamp 6-2 for clamping, and adjusting a first stepping motor 1 in a computer system to control the initial axial displacement of the sample and zero the axial force;
(2) The laser displacement sensor 8 is started, and parameters such as the rotating speed of the second stepping motor 5 are set.
(3) The first motor drives the ball screw to rotate, and as the sliding table 4 is connected with the screw, the screw rotates to drive the sliding table to displace along the axial direction of the screw, so that the loading of axial pulling/pressure of a sample is realized.
(4) The sample is subjected to torque loading, the sample 27 transmits the torque to the first clamp 6-1 and the flexible pivot 10, the flexible pivot 10 and the optical target 9 deflect at the same angle, and the displacement x of target points on two sides of the optical target 1 、x 2 The rotation angle ψ applied by the stepper motors 1, 5 1 、ψ 2 And the axial force measured value F of the micro force sensor 11 is respectively acquired by an A/D acquisition card and transmitted to a computer system, and the computer system calculates and obtains curves such as torque-rotation angle, axial force-displacement and the like when the sample is loaded in real time. After the test is finished, the relevant data are stored.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. A pull-torsion combination testing device for microscale materials, comprising: the device comprises a micro-force loading mechanism, a micro-force sensor, a torque loading mechanism, a micro-torque sensor, a sample clamping unit and a data acquisition and processing unit;
the sample clamping unit comprises a first clamp (6-1) and a second clamp (6-2) which are parallel to each other and are respectively used for clamping two ends of a sample;
the torque loading mechanism comprises a second stepping motor (5), and an output shaft of the second stepping motor is connected with a second clamp (6-2) and is used for applying a torsion angle to the sample;
the micro torque sensor comprises laser displacement sensors I and II (8-1, 8-2) and fixing frames I and II (13-1, 13-2) thereof, an optical target (9) and a flexible pivot (10); the end face of the front end of the flexible pivot (10) is fixedly connected with one end of the micro force sensor (11), and the end face of the rear end is fixedly connected with the first clamp (6-1); the center point of the light target (9) is fixed on the side surface of the rear end of the flexible pivot (10), and target points are arranged at two ends of the light target (9); the laser displacement sensors I and II (8-1, 8-2) are respectively used for measuring displacement variation of target points at two ends of the optical target (9);
the micro-force loading mechanism comprises a first stepping motor (1), a ball screw platform and a sliding table (4), wherein the second stepping motor (5) is arranged on the sliding table (4), and the sliding table (4) is connected with the ball screw (3); an output shaft of the first stepping motor (1) is connected with one end of the ball screw (3) and is used for driving the ball screw (3) to rotate so as to change the length of the ball screw, so that the sliding table (4) and the second stepping motor (5) are driven to generate axial displacement along the ball screw, and axial pulling force or pressure is applied to a sample; the micro force sensor is used for measuring the axial pulling force or the pressure applied to the sample by the micro force loading mechanism;
the data acquisition and processing unit is used for acquiring the measurement data of the micro force sensor and the laser displacement sensors I, II (8-1, 8-2) and calculating the torque of the sample according to the measurement data of the laser displacement sensors I, II (8-1, 8-2).
2. The apparatus of claim 1, wherein the measured data of the laser displacement sensors I, II (8-1, 8-2) and the torque of the sample satisfy the following relation:
Q＝kθ；
where k is the torsional stiffness coefficient of the flexible pivot, θ is the deflection angle of the first clamp, Δx 1 And Deltax 2 And d is the distance between the target points at the two ends of the optical target.
3. The device according to claim 1 or 2, wherein the other end of the micro force sensor (11) is fixed to the front end of the ball screw platform (2) through a micro force sensor bracket (12), and the first stepper motor is mounted at the rear end of the ball screw platform (2).
4. The device according to claim 1, characterized in that the front end face of the flexible pivot (10) is fixedly connected to the micro force sensor (11) by means of a first intermediate connection and the rear end face is fixedly connected to the first clamp (6-1) by means of a second intermediate connection.
5. The device according to claim 1, characterized in that the second stepper motor (5) is fixed to the slide table (4) by means of a stepper motor frame (7).
6. The device according to claim 1, wherein the first clamp (6-1) and the second clamp (6-2) are both cylindrical.
7. The apparatus of claim 1, wherein the data acquisition and processing unit comprises an a/D acquisition card and a computer system; the measuring signals of the micro force sensor (11) and the laser displacement sensors I, II (8-1, 8-2) are respectively collected through different channels of the A/D collecting card.
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| CN202222558397.9U CN219590085U (en) | 2022-09-27 | 2022-09-27 | Pulling and twisting combined testing device for microscale material |
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| CN202222558397.9U CN219590085U (en) | 2022-09-27 | 2022-09-27 | Pulling and twisting combined testing device for microscale material |
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