Multi-dimensional mechanical property strengthening test system for micro-nano-scale soft substances

Abstract

The invention discloses a multi-dimensional mechanical property strengthening test system for micro-nano-scale soft substances, and belongs to a plurality of crossed fields of material science, control engineering, mechanical engineering and the like. The multi-dimensional mechanical property strengthening test system comprises four parts, namely a soft substance sample bearing unit, a load applying unit, an optical observation unit and an upper computer system. The soft substance sample bearing unit comprises an upper lens assembly, a lower lens fine adjustment mechanism assembly and a temperature control unit; the load applying unit comprises a six-dimensional force sensor and a three-dimensional micro-nano scanning table; the optical observation unit comprises an optical microscope and an adjustable light source. The upper computer system is a computer program integrating storage, calculation and display functions and comprises a data automatic processing module and an autonomous analysis module. The system has a multi-dimensional and multi-direction testing function, can be used for carrying out various mechanical property tests such as tension and compression, shearing, fatigue and creep deformation on the soft material under the condition of considering the influence of temperature change, and realizes comprehensive performance evaluation on the soft material.

Description

Technical Field

[0001] The present invention belongs to multiple interdisciplinary fields such as materials science, control engineering, and mechanical engineering. Specifically, it relates to a multi-dimensional and high-precision enhanced testing system for mechanical property testing of soft matter materials at the micro-nano scale. This system can complete mechanical property tests such as tensile, compression, shear, fatigue, and creep of soft matter considering the influence of temperature changes, as well as optical observation of materials, realizing a comprehensive performance evaluation of soft matter materials. Background Art

[0002] Soft matter materials have good flexibility and plasticity and are widely used in many fields such as consumer electronics, medical devices, wearable technologies, automotive electronics, and smart homes. As one of the core materials, soft matter provides lightweight, flexible, and multifunctional characteristics while meeting the requirements of modern technologies for structural flexibility and equipment lightweighting, showing unique advantages in complex user operation environments. With the continuous emergence of frontier applications such as flexible electronics, flexible sensors, flexible energy storage devices, and soft robots, it further highlights the importance of soft matter materials in future technological innovation. In the field of consumer electronics, soft matter materials are widely used in flexible displays, touch panels, and sensors, realizing the combination of portability and intelligent experience; in the field of medical and health, smart patches, flexible electronic skins, and biosensors can closely fit the human body curve, providing better solutions for personalized health monitoring and precision medicine; in automotive electronics and smart homes, soft matter materials have promoted the progress of human-computer interaction, creating possibilities for intelligent and personalized lifestyles. In addition, the applications of soft matter materials in emerging fields such as soft robots, bionics, and aerospace also demonstrate their strong technical adaptability and broad application potential.

[0003] The long-term service of soft matter materials in complex mechanical working conditions makes them prone to performance degradation such as creep, relaxation, and fatigue, and even failure behaviors, seriously affecting the stability and service life of equipment or products. To ensure the quality and reliability of products and equipment, a multi-dimensional enhanced test of the comprehensive performance of soft matter materials should be carried out at the design stage. Through multi-dimensional mechanical property test analysis, it can provide a scientific basis for material selection and optimization, ensuring the stability and reliability of materials in different field applications.

[0004] At present, the performance testing of soft matter materials mainly includes means such as folding tests, tensile and bending tests, scratch resistance tests, and optical property tests. Folding tests are usually used to simulate the folding and unfolding of soft matter materials during use to evaluate their folding resistance and durability. Tensile and bending tests are used to characterize the mechanical properties of materials such as elastic modulus and yield strength. Scratch resistance tests are used to evaluate the wear resistance of the material surface. Optical property tests focus on the performance of materials in terms of optical characteristics, such as transparency and reflectivity. Facing the multi-dimensional and high-precision performance enhancement testing requirements for soft matter, the deficiencies of existing performance testing technologies are mainly reflected in the following aspects:

[0005] (1) Facing the multi-dimensional performance testing requirements in soft matter performance testing. Traditional testing methods are only one of folding tests, tensile and bending tests, scratch resistance tests, and optical property tests. However, the actual use conditions of soft matter are relatively complex and are usually affected by a combination of various complex mechanical conditions such as tension, compression, shear, fatigue, and creep. As a result, existing methods cannot comprehensively reflect their true performance, and existing testing means can only be tested at a single constant temperature and cannot achieve variable condition testing with continuously adjustable temperature, resulting in a serious impact on the accuracy and consistency between the test results and the actual conditions.

[0006] (2) Facing the high-precision and high-stability testing requirements in soft matter performance testing. The displacement accuracy of existing testing means is only at the millimeter level, and the load accuracy also cannot meet the requirements of high-precision testing. In addition, the vibration of the equipment itself significantly interferes with the testing process, resulting in insufficient purity of data acquisition and serious signal distortion, leading to large errors in measurement results and seriously affecting subsequent precise analysis and reliability research based on data.

[0007] (3) Facing the dynamic observation and real-time regulation requirements in soft matter performance testing. Existing testing means cannot achieve real-time observation of the deformation degree of soft matter materials during the testing process, nor can they perform real-time processing and analysis of test data. As a result, the experimental scheme cannot be regulated in real time, and the dual requirements of real-time and controllability cannot be met, affecting the overall accuracy and reliability of the test.

[0008] Patent CN119198370A discloses a mechanical property testing system with an in-situ high-temperature loading device, which can help researchers more accurately evaluate the performance of materials at high temperatures and guide the development of new materials. However, it can only perform micro-tensile experiments on specimens, with a single testing method and unable to achieve multi-dimensional mechanical property testing. To address the above problems, the present invention is dedicated to developing a multi-dimensional high-precision performance enhancement testing system for soft matter. This system has multi-dimensional and multi-directional testing functions, and can perform various mechanical property tests such as tension-compression, shear, fatigue, and creep on soft matter considering the influence of temperature changes, achieving a comprehensive performance evaluation of soft matter materials. In addition, the system supports real-time observation functions, monitors the test process in real-time through a microscopic image collector, etc., and is equipped with data processing software to achieve automatic acquisition, processing, and analysis of test data, greatly improving the efficiency and accuracy of the test. The system also has precise load-displacement control functions, can apply loads in different directions to soft matter, and can flexibly adjust the load and displacement according to requirements, providing a highly customized test plan. Summary of the Invention

[0009] The present invention is dedicated to solving problems in the performance testing of soft matter materials at the micro-nano scale, such as single dimension, insufficient precision and stability, inability to observe in real-time and precisely control, etc., and provides a new solution for multi-dimensional high-precision performance enhancement testing of soft matter. It realizes multi-dimensional performance evaluation of soft matter, improves the precision and stability of the experimental process, as well as the rapid analysis and precise control of experimental data.

[0010] Technical solution of the present invention:

[0011] A multi-dimensional mechanical property enhancement testing system for soft matter at the micro-nano scale, the multi-dimensional mechanical property enhancement testing system includes four major parts: a soft matter specimen bearing unit 0502, a load application unit 0503, an optical observation unit, and a host computer system 0501. The soft matter specimen bearing unit 0502 includes an upper lens assembly 0101, a lower lens fine adjustment mechanism assembly 0106, and a temperature control unit 0505; the load application unit 0503 includes a six-axis force sensor 0107 and a three-dimensional micro-nano scanning stage 0104; the optical observation unit includes an optical microscope 0109 and an adjustable light source 0110. The host computer system 0501 is a computer program integrating storage, calculation, and display functions, and includes a data automatic processing module and an independent analysis module.

[0012] The upper lens assembly 0101 includes an upper lens 0301, an upper lens retaining ring 0302, an upper cover plate 0304, a support block 0103, and a bottom plate 0105. The circumference of the upper lens 0301 is fixed to the lower surface of the upper cover plate 0304 by the upper lens retaining ring 0302. The upper lens 0301 is used to apply pressure to the soft material specimen 0504. The upper cover plate 0304 supports and fixes the upper lens 0301. The upper and lower ends of the support block 0103 are respectively used to connect the upper cover plate 0304 and the bottom plate 0105 to provide a stable support structure. The bottom plate 0105 is rigidly connected to the support block 0103 to form an integral frame.

[0013] Further, an upper lens rubber pad 0307 is provided between the upper lens 0301 and the upper lens retaining ring 0302.

[0014] Further, the upper and lower ends of the support block 0103 are respectively fixed to the upper cover plate 0304 and the bottom plate 0105 through gaskets 0305 and socket head cap screws B 0306.

[0015] Further, the upper lens retaining ring 0302 is connected to the lower surface of the upper cover plate 0304 by socket head cap screws A 0303.

[0016] The lower lens fine-tuning mechanism assembly 0106 includes a lower lens 0409, a lower lens heating ring 0410, a lower lens pressing ring 0411, a heat insulation sheet 0408, a heating sheet 0407, a lower lens carrier plate 0401, a lower lens tray 0402, a precision screw pair 0404, and a wedge block 0403. The lower lens carrier plate 0401 is located at the bottom of the entire lower lens fine-tuning mechanism assembly 0106. A cylindrical groove is provided inside to accommodate the entire lower lens fine-tuning mechanism assembly 0106, playing a role in supporting the entire lower lens fine-tuning mechanism assembly 0106, and realizing the fine-tuning function through other components; the lower lens tray 0402 is located above the lower lens carrier plate 0401. Through holes are provided in the center of the cylindrical groove of the lower lens carrier plate 0401 and the lower lens tray 0402. The upper surface of the lower lens tray 0402 is in contact with the bottom surface of the lower lens 0409. A number of radial inclined grooves are evenly provided along the circumference on the lower surface, and the inclined angle is the same as that of the inclined surface of the wedge block 0403, and the two inclined surfaces are in contact. The wedge block 0403 is located in the inclined groove. The flat surface of the wedge block 0403 and the lower surface of the lower lens tray 0402 are both in contact with the bottom surface of the cylindrical groove of the lower lens carrier plate 0401. The lower lens 0409 is the bottom lens for carrying the soft material sample 0504. A threaded hole is provided in the length direction of the wedge block 0403, which is matched with the thread of the precision screw pair 0404. The screw pair plug 0405 is fixed to the outer end of the precision screw pair 0404. By rotating the screw pair plug 0405, the wedge block 0403 moves inwards and outwards along the inclined groove of the lower lens tray 0402, and then pushes the lower lens tray 0402 to move upwards or downwards. The upward and downward movement of the lower lens tray 0402 will drive the lower lens 0409 to move. The cooperation between the wedge block 0403 and the precision screw pair 0404 can also realize the angle fine-tuning of the lower lens 0409, ensuring that the upper surface of the lower lens 0409 is parallel to the lower surface of the upper lens 0301, so that the soft material sample 0504 is uniformly stressed; the lower lens heating ring 0410 is closely attached to the circumference of the lower lens 0409, used to heat the lower lens 0409 to adjust the temperature of the soft material sample 0504; the heating sheet 0407 is closely attached to the lower lens heating ring 0410; the heat insulation sheet 0408 is located outside the heating sheet 0407, used to isolate heat and prevent heat transfer to other components; the rubber pad 0412 is closely attached to the outside of the heat insulation sheet 0408; the lower lens pressing ring 0411 is installed at the top of the entire lower lens fine-tuning mechanism assembly 0106 and is connected to the lower lens carrier plate 0401 by a thread, used to keep the components stable.

[0017] Further, the lower end of the cylindrical pin 0406 passes through the hole of the six-axis force sensor 0107, and the upper end passes through the holes of the lower lens carrier plate 0401 and the lower lens tray 0402, for positioning between the lower lens fine-tuning mechanism assembly 0106 and the six-axis force sensor 0107.

[0018] The temperature control unit 0505 is used to adjust and maintain the test temperature of the soft matter sample 0504, and includes a temperature sensor, a heating device, and a temperature controller. The temperature sensor is arranged between the lower lens 0409 and the lower lens heating ring 0410, and can real-time monitor the temperatures of the lower lens 0409 and the soft matter sample 0504 to ensure the accuracy of temperature control; the heating sheet 0407 in the heating device is connected to the lower lens heating ring 0410, and after the heating sheet 0407 is heated, it transfers heat to the lower lens 0409 through the lower lens heating ring 0410, so that the soft matter sample 0504 reaches and maintains the required test temperature; the heat insulation sheet 0408 is used to prevent unnecessary heat conduction to ensure the accuracy of temperature control; the temperature controller is respectively connected to the temperature sensor and the heating device, and according to the temperature feedback of the temperature sensor, it real-time adjusts the working state of the heating device to achieve precise temperature control.

[0019] Through the coordinated work of each component, the high-precision and high-stability requirements in the soft matter performance test are met. The upper lens assembly 0101 and the lower lens fine-tuning mechanism assembly 0106 ensure the position accuracy and uniform force application of the sample during the test, while the temperature control unit 0505 ensures that the sample is tested under the required temperature conditions, ultimately guaranteeing the accuracy and reliability of the test results.

[0020] The lower lens fine-tuning mechanism assembly 0106, the six-axis force sensor 0107, the six-axis force sensor support plate 0108, and the three-dimensional micro-nano scanning stage 0104 are fixed in sequence from top to bottom, and the whole after fixation is located between the upper cover plate 0304 and the bottom plate 0105. The three-dimensional micro-nano scanning stage 0104 is fixed on the bottom plate 0105. By controlling the three-dimensional movement of the execution surface in the three-dimensional micro-nano scanning stage 0104 through the host computer system 0501, it can drive the three-dimensional movement of the lower lens fine-tuning mechanism assembly 0106, the six-axis force sensor 0107, and the six-axis force sensor support plate 0108, thereby changing the tensile, compressive, and shear force changes of the soft matter sample bearing unit 0502 on the tested soft matter sample 0504. The force signals received by the soft matter sample 0504 are then detected by the six-axis force sensor 0107 and fed back to the host computer system 0501, and finally the host computer system 0501 adjusts and controls the movement of the execution surface of the three-dimensional micro-nano scanning stage 0104 according to the mechanical loading requirements required by the user.

[0021] The optical microscope 0109 is located above the upper lens assembly 0101 and is used to observe the deformation and microscopic structure changes of the soft matter specimen 0504 under the influence of force or external conditions. By combining with a CCD (Charge Coupled Device), it can capture microscopic images in real time to achieve precise observation of the soft matter specimen 0504. The soft matter specimen carrier unit 0502 and the load application unit 0503 are of hollow structure. The light from the adjustable light source 0110 at the bottom of the bottom plate 0105 can pass through the bottom of the bottom plate 0105 to illuminate the soft matter specimen 0504, ensuring that the optical microscope 0109 can clearly observe the deformation of the soft matter specimen 0504. The adjustable light source 0110 allows adjustment of the light intensity, brightness, and spectral characteristics, thereby optimizing the illumination conditions of the soft matter specimen 0504, reducing reflection or overexposure, and ensuring good imaging effects of the soft matter specimen 0504.

[0022] An outer shell 0102 is provided outside the soft matter specimen carrier unit 0502 and the load application unit 0503.

[0023] The data automatic processing calculation module can perform noise reduction, filtering, and normalization preprocessing operations on the original data of load, displacement, temperature, and deformation of the soft matter specimen 0504 collected by the six-dimensional force sensor 0107 and the temperature sensor, ensuring high purity and low distortion rate of the data, and visualizing the data and generating reports for subsequent analysis. The independent analysis module can analyze the performance of the soft matter specimen 0504 in dynamic force and multi-dimensional changes in real time for different types of experimental scenarios. The host computer system 0501 can achieve closed-loop control of the entire test process through real-time data acquisition and dynamic adjustment, adjust the test parameters according to the dynamic performance of the soft matter specimen 0504, and complete the test under variable working conditions.

[0024] Advantages of the present invention:

[0025] This multi-dimensional mechanical property strengthening test system can apply tiny and rapidly changing three-dimensional axial forces and tangential forces to the soft matter to simulate the dynamic loading conditions in the actual use process, and can also perform tests under continuously changing temperature conditions, realizing multi-dimensional performance testing of soft matter materials, and more truly reflecting the performance of soft matter in actual service conditions.

[0026] This multi-dimensional mechanical property strengthening test system can perform high-precision adjustment of the position and angle of the lower lens 0409 at the sub-micron level through the lower lens fine-tuning mechanism assembly 0106, thereby adapting to soft matter specimens 0504 of different thicknesses, ensuring uniform stress on the specimen, providing accuracy guarantee for the testing of soft matter materials at the micro-nano scale, realizing precise control of the stress state of the specimen during the test, and improving the reliability and repeatability of the test results.

[0027] This multi-dimensional mechanical property strengthening test system can test the dynamic evolution behavior of soft matter at high frequencies. By designing corresponding accelerated test methods, it realizes the strengthening experimental test of soft matter specimens, reduces the overall test time, and improves the evaluation efficiency.

[0028] This multi-dimensional mechanical property strengthening test system designs a soft matter specimen bearing unit 0502 and a load application unit 0503 with a hollow structure. The light from the light source can pass through the upper lens 0301, the lower lens 0409 and the soft matter specimen 0504 from the bottom plate of the device, so that the fatigue test situation of the specimen can be clearly observed from the microscopic image collector. Based on the real-time self-processing algorithm of data, it realizes the real-time analysis of test data and the real-time regulation of test schemes, significantly improves the real-time performance and accuracy of the test, and ensures that every step in the test process can be accurately monitored and adjusted. Description of the Drawings

[0029] Figure 1 is the overall schematic diagram of the multi-dimensional mechanical property strengthening test system for soft matter specimens;

[0030] Figure 2 is the general assembly drawing of the multi-dimensional mechanical property strengthening test system;

[0031] Figure 3 is the schematic diagram of the multi-dimensional mechanical property strengthening test system;

[0032] Figure 4 is the structure diagram of the soft matter specimen bearing unit;

[0033] Figure 5 is the structure diagram of the upper lens assembly, where (a) is the front view and (b) is the A-A sectional view;

[0034] Figure 6 is the structure diagram of the lower lens fine-tuning mechanism assembly, where (a) is the front view and (b) is the A-A sectional view;

[0035] Figure 7 is the flow chart of the multi-dimensional mechanical property strengthening test system for soft matter;

[0036] Figure 8 is the PID control flow chart of the strengthening test system;

[0037] Figure 9 is the data self-processing flow chart.

[0038] Reference numerals in the figure: 0101 is the upper lens assembly; 0102 is the outer shell; 0103 is the support block; 0104 is the three-dimensional micro-nano scanning stage; 0105 is the bottom plate; 0106 is the lower lens fine adjustment mechanism assembly; 0107 is the six-axis force sensor; 0108 is the six-axis force sensor support plate; 0109 is the optical microscope; 0110 is the adjustable light source; 0301 is the upper lens; 0302 is the upper lens retaining ring; 0303 is the round head socket head cap screw A; 0304 is the upper cover plate; 0305 is the gasket; 0306 is the round head socket head cap screw B; 0307 is the upper lens rubber pad; 0401 is the lower lens carrier plate; 0402 is the lower lens tray; 0403 is the wedge block; 0404 is the precision thread pair; 0405 is the thread pair plug; 0406 is the cylindrical pin; 0407 is the heating sheet; 0408 is the heat insulation sheet; 0409 is the lower lens; 0410 is the lower lens heating ring; 0411 is the lower lens retaining ring; 0412 is the rubber pad; 0501 is the host computer system; 0502 is the soft matter sample bearing unit; 0503 is the load application unit; 0504 is the soft matter sample; 0505 is the temperature control unit. Detailed implementation manners

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0040] A multi-dimensional mechanical property enhancement test system for soft matter at the micro-nano scale, the multi-dimensional mechanical property enhancement test system includes four major parts (as Figure 1 、 Figure 3 shown): a soft matter sample bearing unit 0502, a load application unit 0503, an optical observation unit, and a host computer system 0501. The soft matter sample bearing unit 0502 includes an upper lens assembly 0101, a lower lens fine adjustment mechanism assembly 0106, and a temperature control unit 0505; the load application unit 0503 includes a six-axis force sensor 0107 and a three-dimensional micro-nano scanning stage 0104; the optical observation unit includes an optical microscope 0109 and an adjustable light source 0110. The host computer system 0501 is a computer program integrating storage, calculation, and display functions, and includes a data automatic processing module and an independent analysis module.

[0041] As Figure 2 、 Figure 5As shown, the upper lens assembly 0101 includes an upper lens 0301, an upper lens retaining ring 0302, an upper cover plate 0304, a support block 0103, and a bottom plate 0105. The circumference of the upper lens 0301 is fixed to the lower surface of the upper cover plate 0304 by the upper lens retaining ring 0302, and the upper lens 0301 is used to apply pressure to the soft material specimen 0504; the upper cover plate 0304 supports and fixes the upper lens 0301; the upper and lower ends of the support block 0103 are respectively used to connect the upper cover plate 0304 and the bottom plate 0105 to provide a stable support structure; the bottom plate 0105 is rigidly connected to the support block 0103 to form an integral frame.

[0042] An upper lens rubber pad 0307 is provided between the upper lens 0301 and the upper lens retaining ring 0302. The upper and lower ends of the support block 0103 are respectively fixed to the upper cover plate 0304 and the bottom plate 0105 by gaskets 0305 and socket head cap screws B0306. The upper lens retaining ring 0302 is connected to the lower surface of the upper cover plate 0304 by socket head cap screws A0303.

[0043] As Figure 2 , Figure 6As shown, the lower lens fine-tuning mechanism assembly 0106 includes a lower lens 0409, a lower lens heating ring 0410, a lower lens pressing ring 0411, a heat insulation sheet 0408, a heating sheet 0407, a lower lens carrier plate 0401, a lower lens tray 0402, a precision screw pair 0404, and a wedge block 0403. The lower lens carrier plate 0401 is located at the bottom of the entire lower lens fine-tuning mechanism assembly 0106. A cylindrical groove is opened inside it to accommodate the entire lower lens fine-tuning mechanism assembly 0106, playing a role in supporting the entire lower lens fine-tuning mechanism assembly 0106, and realizing the fine-tuning function through other components; the lower lens tray 0402 is located above the lower lens carrier plate 0401. Through holes are opened at the center of the cylindrical groove of the lower lens carrier plate 0401 and the center of the lower lens tray 0402. The upper surface of the lower lens tray 0402 is in contact with the bottom surface of the lower lens 0409. A number of radial inclined grooves are evenly opened along the circumferential direction on the lower surface, and the inclined angle is the same as that of the inclined surface of the wedge block 0403, and the two inclined surfaces are in contact. The wedge block 0403 is located in the inclined groove. The plane of the wedge block 0403 and the lower surface of the lower lens tray 0402 are both in contact with the bottom surface of the cylindrical groove of the lower lens carrier plate 0401. The lower lens 0409 is the bottom lens for carrying the soft material specimen 0504. A threaded hole is opened in the length direction of the wedge block 0403, which is matched with the thread of the precision screw pair 0404. The screw pair plug 0405 is fixed to the outer end of the precision screw pair 0404. By rotating the screw pair plug 0405, the wedge block 0403 moves inward and outward along the inclined groove of the lower lens tray 0402, and then pushes the lower lens tray 0402 to move upward or downward. The upward and downward movement of the lower lens tray 0402 will drive the lower lens 0409 to move. The cooperation between the wedge block 0403 and the precision screw pair 0404 can also realize the angle fine-tuning of the lower lens 0409, ensuring that the upper surface of the lower lens 0409 is parallel to the lower surface of the upper lens 0301, so that the soft material specimen 0504 is evenly stressed; the lower lens heating ring 0410 is closely attached to the circumference of the lower lens 0409, used to heat the lower lens 0409 to adjust the temperature of the soft material specimen 0504; the heating sheet 0407 is closely attached to the lower lens heating ring 0410; the heat insulation sheet 0408 is located outside the heating sheet 0407, used to isolate heat and prevent heat transfer to other components; the rubber pad 0412 is closely attached to the outside of the heat insulation sheet 0408; the lower lens pressing ring 0411 is installed at the top of the entire lower lens fine-tuning mechanism assembly 0106 and is connected to the lower lens carrier plate 0401 by a thread, used to keep the components stable.

[0044] The lower end of the cylindrical pin 0406 passes through the hole of the six-axis force sensor 0107, and the upper end passes through the holes of the lower lens carrier plate 0401 and the lower lens tray 0402, used for positioning between the lower lens fine-tuning mechanism assembly 0106 and the six-axis force sensor 0107.

[0045] The temperature control unit 0505 is used to adjust and maintain the test temperature of the soft matter sample 0504, and includes a temperature sensor, a heating device, and a temperature controller. The temperature sensor is arranged between the lower lens 0409 and the lower lens heating ring 0410, and can real-time monitor the temperatures of the lower lens 0409 and the soft matter sample 0504 to ensure the accuracy of temperature control; the heating sheet 0407 in the heating device is connected to the lower lens heating ring 0410. After the heating sheet 0407 is heated, heat is transferred to the lower lens 0409 through the lower lens heating ring 0410, so that the soft matter sample 0504 reaches and maintains the required test temperature; the heat insulation sheet 0408 is used to prevent unnecessary heat conduction to ensure the accuracy of temperature control; the temperature controller is respectively connected to the temperature sensor and the heating device, and according to the temperature feedback of the temperature sensor, the working state of the heating device is adjusted in real time to achieve precise temperature control.

[0046] Through the collaborative work of each component, the high-precision and high-stability requirements in the soft matter performance test are met. The upper lens assembly 0101 and the lower lens fine adjustment mechanism assembly 0106 ensure the position accuracy and uniform force of the sample during the test, while the temperature control unit 0505 ensures that the sample is tested under the required temperature conditions, ultimately ensuring the accuracy and reliability of the test results.

[0047] The lower lens fine adjustment mechanism assembly 0106, the six-axis force sensor 0107, the six-axis force sensor support plate 0108, and the three-dimensional micro-nano scanning stage 0104 are fixed in sequence from top to bottom, and the fixed whole is located between the upper cover plate 0304 and the bottom plate 0105. The three-dimensional micro-nano scanning stage 0104 is fixed on the bottom plate 0105. By controlling the three-dimensional movement of the execution surface in the three-dimensional micro-nano scanning stage 0104 through the host computer system 0501, the three-dimensional movement of the lower lens fine adjustment mechanism assembly 0106, the six-axis force sensor 0107, and the six-axis force sensor support plate 0108 can be driven, thereby changing the tensile, compressive, and shear force changes of the soft matter sample bearing unit 0502 on the tested soft matter sample 0504. The force signals received by the soft matter sample 0504 are then detected by the six-axis force sensor 0107 and fed back to the host computer system 0501. Finally, the host computer system 0501 adjusts and controls the movement of the execution surface of the three-dimensional micro-nano scanning stage 0104 according to the mechanical loading requirements required by the user.

[0048] The optical microscope 0109 is located above the upper lens assembly 0101 and is used to observe the deformation and microscopic structure changes of the soft matter specimen 0504 under the influence of force or external conditions. By combining with a CCD (Charge Coupled Device), it can capture microscopic images in real time to achieve precise observation of the soft matter specimen 0504. The soft matter specimen bearing unit 0502 and the load application unit 0503 are of hollow structure. The light from the adjustable light source 0110 at the bottom of the bottom plate 0105 can pass through the bottom of the bottom plate 0105 to illuminate the soft matter specimen 0504, ensuring that the optical microscope 0109 can clearly observe the deformation of the soft matter specimen 0504. The adjustable light source 0110 allows adjustment of the light intensity, brightness, and spectral characteristics, thereby optimizing the illumination conditions of the soft matter specimen 0504, reducing reflection or overexposure, and ensuring good imaging effects of the soft matter specimen 0504.

[0049] An outer shell 0102 is provided outside the soft matter specimen bearing unit 0502 and the load application unit 0503.

[0050] The data automatic processing calculation module can perform noise reduction, filtering, and normalization preprocessing operations on the original data of load, displacement, temperature, and deformation of the soft matter specimen collected by the six-axis force sensor 0107 and the temperature sensor, ensuring high data purity and low distortion rate, and visualizing the data and generating reports for subsequent analysis. The independent analysis module can analyze the performance of the soft matter specimen 0504 in dynamic force and multi-dimensional changes in real time for different types of experimental scenarios. The host computer system 0501 can achieve closed-loop control of the entire test process through real-time data acquisition and dynamic adjustment, adjust the test parameters according to the dynamic performance of the soft matter specimen 0504, and complete the test under variable working conditions.

[0051] The complete working process of a multi-dimensional mechanical property strengthening test system for micro-nano scale soft matter in this patent is as follows: Disassemble the upper lens assembly 0101, place the soft matter specimen 0504 in the middle of the lower lens 0409 and fix it tightly. Adjust the heating sheet 0407 to preheat the lower lens 0409 to the specified temperature. By controlling the input digital signal to the three-dimensional micro-nano scanning stage 0104, move the three-dimensional micro-nano scanning stage 0104 down to the lowest position, and use a pre-tightening force wrench to fix the upper lens assembly 0101. Control the three-dimensional micro-nano scanning stage 0104 to move up to apply a pre-tightening force and start the performance strengthening test: First, apply a voltage to the three-dimensional micro-nano scanning stage 0104. As the applied voltage gradually increases, the soft matter specimen 0504 moves upward. When the axial force value displayed by the six-dimensional force sensor 0107 starts to change from 0, the system records the voltage signal at this time, denoted as V1; when the three-dimensional micro-nano scanning stage 0104 continues to move upward and the axial force value displayed by the six-dimensional force sensor 0107 is the set pre-tightening force value (0N - 10N), the system records the voltage signal at this time, denoted as V2; when the value of the six-dimensional force sensor 0107 is the set force upper limit, it is denoted as V3; finally, when working normally, the system inputs a periodically changing voltage of V1 - V3 to the three-dimensional micro-nano scanning stage 0104 to provide a periodically changing axial force to the workpiece.

[0052] For the provision of tangential force, the scheme is similar to the above. It will be possible to simultaneously complete the periodic changes of axial force and tangential force (multi-dimensional forces are carried out simultaneously). By inputting different waveforms, unidirectional or multi-directional high-frequency movement in the X, Y, and Z directions of the three-dimensional micro-nano scanning stage 0104 can be achieved, and free combinations of square waves, sawtooth waves, sine waves, or self-set waveforms can be realized. The three-dimensional micro-nano scanning stage 0104 relies on its own displacement feedback for displacement. The displacement causes the test material to deform, and the force generated by the deformation is fed back to the three-dimensional micro-nano scanning stage 0104 through the six-dimensional force sensor 0107. The overall test flow chart of this system is as Figure 7 shown. Introduce the PID control process in the displacement and force load control of the three-dimensional micro-nano scanning stage 0104. Based on the real-time feedback of the six-dimensional force sensor 0107, high-precision closed-loop regulation can be achieved to enhance the control accuracy and stability of the system. The PID control process includes setting the target displacement or load value, obtaining the feedback data of the six-dimensional force sensor 0107 in real time, and calculating the error between the actual value and the set value. The PID controller controls according to the error through three adjustment modes: proportional, integral, and differential. First, determine the PID parameters through experimental data to obtain the optimal response effect; through real-time feedback control closed-loop adjustment, keep the displacement and load stable in the dynamic experiment. The PID control process is as Figure 8As shown in the figure. Through the six-axis force sensor 0107 and the three-dimensional micro-nano scanning stage 0104, the processing data can be obtained in real time, and combined with the data processing algorithm for rapid and accurate analysis and regulation. The specific data processing process is as follows: Format and standardize the real-time load data collected by the six-axis force sensor 0107 and the real-time displacement data collected by the three-dimensional micro-nano scanning stage 0104, and extract the features of the data to determine whether it is consistent with the set experimental target value. If it is consistent, continue the experiment and data collection; if it is not consistent, adjust the experimental plan in real time according to the analysis results of machine learning or statistical methods. The specific data processing process is as Figure 9 shown. The overall device is a hollow structure. During the entire testing process, the light source is incident from the bottom ( Figure 4 ), and the microscopic deformation of the soft matter sample 0504 to be detected can be observed in real time by the microscopic CCD camera, and the microscopic structural changes of the soft matter during the testing process can be captured.

[0053] Compared with the prior art, the advantages of the present invention are as follows:

[0054] 1) The testing system of the present patent invention integrates the existing performance detection technologies, can perform comprehensive mechanical property tests on soft matter in multiple dimensions and multiple directions such as tension, compression, and shear, and optimizes the detection process, greatly improving the detection efficiency.

[0055] 2) The existing testing means for high-performance flexible materials have insufficient accuracy and stability. The testing system of the present patent invention can achieve micro motion and precise positioning, and provide precise load control, and the accuracy and stability are much better than the traditional performance testing system.

[0056] 3) Real-time observation and data processing. Through the combination of the hollow structure of the device and the bottom light source with the top microscopic image collector, the microscopic structural changes and deformation degree of the soft matter during the testing process can be captured in real time. Through the self-developed data processing algorithm, rapid analysis and precise regulation of the real-time signal input and data collection during the testing can be carried out.

[0057] 4) It can meet the customized testing requirements. The testing system of the present patent invention has an accurate load displacement control function, can apply loads in different directions to the soft matter, and can flexibly adjust the load and displacement according to the requirements, providing a highly customized testing plan.

Claims

1. A multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter, characterized in that: The multi-dimensional mechanical property strengthening test system comprises four parts: a soft matter sample bearing unit (0502), a load application unit (0503), an optical observation unit and a host computer system (0501); the soft matter sample bearing unit (0502) comprises an upper lens assembly (0101), a lower lens fine-tuning mechanism assembly (0106), and a temperature control unit (0505); the load application unit (0503) comprises a six-dimensional force sensor (0107) and a three-dimensional micro-nano scanning platform (0104); the optical observation unit comprises an optical microscope (0109) and an adjustable light source (0110); the host computer system (0501) is a computer program integrating storage, calculation and display functions, and comprises a data automatic processing module and an autonomous analysis module.

2. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The upper lens assembly (0101) comprises an upper lens (0301), an upper lens pressure ring (0302), an upper cover plate (0304), a support block (0103) and a bottom plate (0105); the circumference of the upper lens (0301) is fixed to the lower surface of the upper cover plate (0304) by the upper lens pressure ring (0302), and the upper lens (0301) is used to apply pressure to the soft material sample (0504); the upper cover plate (0304) supports and fixes the upper lens (0301); the upper and lower ends of the support block (0103) are respectively used to connect the upper cover plate (0304) and the bottom plate (0105) to provide a stable support structure; the bottom plate (0105) is rigidly connected to the support block (0103) to form an overall frame.

3. The multi-dimensional mechanical properties enhancement testing system for micro-nano scale soft matter according to claim 2, characterized in that: An upper lens rubber pad (0307) is provided between the upper lens (0301) and the upper lens pressure ring (0302); the upper and lower ends of the support block (0103) are respectively fixed to the upper cover plate (0304) and the bottom plate (0105) via a gasket (0305) and a round-head hexagon socket bolt A (0306); the upper lens pressure ring (0302) is connected to the lower surface of the upper cover plate (0304) via a round-head hexagon socket bolt B (0303).

4. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The lower lens fine-tuning mechanism assembly (0106) comprises a lower lens (0409), a lower lens heating ring (0410), a lower lens pressure ring (0411), a heat insulating sheet (0408), a heating sheet (0407), a lower lens supporting plate (0401), a lower lens tray (0402), a precision thread pair (0404), and a wedge block (0403); the lower lens supporting plate (0401) is located at the bottom of the entire lower lens fine-tuning mechanism assembly (0106), and a cylindrical groove is provided inside thereof for accommodating the entire lower lens fine-tuning mechanism assembly (0106), playing the role of supporting the entire lower lens fine-tuning mechanism assembly (0106), and realizing the fine-tuning function through other components; the lower lens tray (0402) is located at Above the lower lens carrier plate (0401), through holes are provided in the center of the cylindrical groove of the lower lens carrier plate (0401) and the lower lens tray (0402); the upper surface of the lower lens tray (0402) is in contact with the bottom surface of the lower lens (0409); a plurality of radial inclined grooves are evenly provided on the lower surface along the circumference; the angle of the inclined surface is consistent with the angle of the inclined surface of the wedge block (0403); the inclined surfaces of the two are in contact with each other; the wedge block (0403) is in the inclined groove; the plane of the wedge block (0403) and the lower surface of the lower lens tray (0402) are in contact with the bottom surface of the cylindrical groove of the lower lens carrier plate (0401); the lower lens (0409) is the bottom lens for carrying the soft material sample (0504); the wedge block (0403) A threaded hole is provided in the length direction thereof to cooperate with the thread of the precision thread pair (0404); the thread pair plug (0405) is fixed to the outer end of the precision thread pair (0404); by rotating the thread pair plug (0405), the wedge block (0403) moves inwardly or outwardly along the inclined groove of the lower lens tray (0402), thereby pushing the lower lens tray (0402) upward or downward to move; the upward and downward movement of the lower lens tray (0402) will drive the lower lens (0409) to move; the cooperation between the wedge block (0403) and the precision thread pair (0404) can also realize the fine adjustment of the angle of the lower lens (0409), ensuring that the upper surface of the lower lens (0409) is parallel to the lower surface of the upper lens (0301). , so that the soft material sample (0504) is evenly stressed; the lower lens heating ring (0410) is tightly fitted around the lower lens (0409) and is used to heat the lower lens (0409) to adjust the temperature of the soft material sample (0504); the heating plate (0407) is tightly fitted to the lower lens heating ring (0410); the heat insulating plate (0408) is located outside the heating plate (0407) and is used to isolate heat and prevent heat transfer to other components; the rubber pad (0412) is tightly fitted to the outside of the heat insulating plate (0408); the lower lens pressure ring (0411) is installed at the top of the lower lens fine-tuning mechanism assembly (0106) as a whole, and is connected to the lower lens bearing plate (0401) through a thread to keep the component stable.

5. The multi-dimensional mechanical properties enhancement testing system for micro-nano scale soft matter according to claim 4, characterized in that: The lower end of the cylindrical pin (0406) passes through the hole of the six-dimensional force sensor (0107), and the upper end passes through the holes of the lower lens bearing plate (0401) and the lower lens tray (0402), so as to be used for positioning between the lower lens fine-tuning mechanism assembly (0106) and the six-dimensional force sensor (0107).

6. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The temperature control unit (0505) is used to adjust and maintain the test temperature of the soft matter sample (0504), and comprises a temperature sensor, a heating device, and a temperature controller; the temperature sensor is arranged between the lower lens (0409) and the lower lens heating ring (0410), and can monitor the temperature of the lower lens (0409) and the soft matter sample (0504) in real time to ensure the accuracy of temperature control; the heating plate (0407) in the heating device is connected to the lower lens heating ring (0410), and after the heating plate (0407) is heated, it transfers heat to the lower lens (0409) through the lower lens heating ring (0410), so that the soft matter sample (0504) reaches and maintains the required test temperature; the heat insulation plate (0408) is used to prevent unnecessary heat conduction and ensure the accuracy of temperature control; the temperature controller is respectively connected to the temperature sensor and the heating device, and adjusts the working state of the heating device in real time according to the temperature feedback of the temperature sensor to achieve accurate temperature control.

7. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The lower lens fine-tuning mechanism component (0106), the six-dimensional force sensor (0107), the six-dimensional force sensor support plate (0108), and the three-dimensional micro-nano scanning platform (0104) are fixed in sequence from top to bottom, and the fixed whole is located between the upper cover plate (0304) and the bottom plate (0105). The three-dimensional micro-nano scanning platform (0104) is fixed on the bottom plate (0105). The three-dimensional movement of the execution surface in the three-dimensional micro-nano scanning platform (0104) is controlled by the upper computer system (0501), which can drive the lower lens fine-tuning mechanism component (0106), The three-dimensional movement of the six-dimensional force sensor (0107) and the six-dimensional force sensor support plate (0108) changes the tension, compression and shear force of the soft matter sample bearing unit (0502) on the tested soft matter sample (0504); the various force signals exerted on the soft matter sample (0504) are then detected by the six-dimensional force sensor (0107) and fed back to the host computer system (0501), and finally the host computer system (0501) adjusts and controls the movement of the execution surface of the three-dimensional micro-nano scanning platform (0104) according to the mechanical loading requirements required by the user.

8. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The optical microscope (0109) is located above the upper lens assembly (0101) and is used to observe the deformation and microstructural changes of the soft matter sample (0504) under the influence of force or external conditions, and is combined with CCD to capture microscopic images in real time to achieve accurate observation of the soft matter sample (0504); the soft matter sample bearing unit (0502) and the load applying unit (0503) are hollow structures, and the light of the adjustable light source (0110) at the bottom of the bottom plate (0105) can pass through the bottom of the bottom plate (0105) to illuminate the soft matter sample (0504), so as to ensure that the optical microscope (0109) can clearly observe the deformation of the soft matter sample (0504); the adjustable light source (0110) allows the intensity, brightness and spectral characteristics of the light to be adjusted, thereby optimizing the lighting conditions of the soft matter sample (0504), reducing reflection or overexposure, and ensuring a good imaging effect of the soft matter sample (0504).

9. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The soft matter sample carrying unit (0502) and the load applying unit (0503) are provided with a shell (0102) outside.

10. The multi-dimensional mechanical properties strengthening test system for micro-nano scale soft matter according to claim 1, characterized in that: The data automation processing module can perform noise reduction, filtering, and normalization preprocessing operations on the original data of load, displacement, temperature, and deformation of soft matter samples (0504) collected by the six-dimensional force sensor (0107) and temperature sensor to ensure high purity and low distortion of the data, and visualize the data and generate reports for subsequent analysis; the autonomous analysis module can analyze the performance of soft matter samples (0504) in dynamic force and multi-dimensional changes in real time for different types of experimental scenarios; the host computer system (0501) can achieve closed-loop control of the entire test process through real-time data collection and dynamic adjustment, adjust test parameters according to the dynamic performance of the soft matter sample (0504), and complete the test under variable working conditions.

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