Mechanical property integrated detection equipment and system for easy-to-deform new material part

Abstract

The invention relates to the technical field of material mechanical property detection, and discloses a mechanical property integrated detection device and system for easily-deformed new material parts, and the device comprises a housing, a PLC controller, a precision alignment platform, a correction assembly and a detection assembly. The correcting assembly is provided with six groups of miniature linear modules and L-shaped shifting fingers with miniature force sensors on the placing table in a radial shape; the detection assembly integrates a visual system and a test pressure head in sliding connection. According to the system, visual positioning and force sense feedback are utilized, and the modules are controlled to feed independently to flatten the parts. According to the invention, the radial correction mechanism is matched with the sapphire plate, so that automatic flattening and consistent positioning of easily-deformed parts are realized; the sample is prevented from being damaged during correction by utilizing a double feedback mechanism; and in combination with a floating pressure head structure, driving inertia impact is effectively isolated, and the precision and data reliability of micro force value detection of the new material are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of material mechanical property testing technology, specifically to an integrated testing equipment and system for the mechanical properties of easily deformable new material parts. Background Technology

[0002] With the development of materials science, various flexible electronic materials, biomedical thin films, and nanocomposite materials, which are easily deformable, have been widely used in industry. These materials are typically characterized by thinness, low stiffness, and complex surface microstructures, making accurate testing of their mechanical properties a key aspect of product development and quality control.

[0003] Existing general-purpose mechanical testing machines have significant limitations when testing such easily deformable materials. Because these materials are prone to curling, wrinkling, or irregular warping when naturally placed, they cannot maintain a standard planar state like hard metal specimens. Before testing, operators typically need to manually flatten and fix the sample. This manual operation is not only inefficient but also makes it difficult to ensure consistent preload for each clamping, leading to variations in the geometric boundary conditions of the sample during testing and severely affecting the repeatability and accuracy of the test data.

[0004] In terms of mechanical loading structures, traditional testing equipment often uses servo motors to directly drive the loading spindle and sensor via a lead screw for downward pressure testing. This rigid connection structure generates additional impact force at the moment of contact with the sample due to the inertia of the drive components and the spindle itself. For hard materials with high load-bearing capacity, this inertial effect is negligible. However, for soft new materials with micro-Newton or millinewton ranges, this initial impact often introduces measurement noise and may even mask the material's true elastic response in the initial yielding stage, leading to deviations in the calculation of key indicators such as the elastic modulus.

[0005] Furthermore, to address the issue of sample curling, some specialized equipment attempts to use mechanical clamps to stretch and flatten the samples. However, most existing flattening mechanisms lack sophisticated force monitoring and feedback mechanisms, relying solely on displacement control to stretch the sample. For fragile ultrathin materials or brittle films, improper control of the flattening force can easily lead to sample edge tearing, overstretching, or irreversible plastic deformation before formal testing even begins, resulting in sample scrap. This is an unacceptable loss for new material samples with high preparation costs. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an integrated testing equipment and system for the mechanical properties of easily deformable new material parts. It solves the problems in existing technologies, such as the difficulty in precise positioning of easily deformable material parts during mechanical testing due to material curling, the easy damage to samples caused by contact flattening operations, and the inaccuracy of elastic modulus calculation data due to differences in surface micromorphology.

[0007] To achieve the above objectives, the present invention provides an integrated testing device for the mechanical properties of easily deformable new material parts, comprising a housing, an operation panel and a display screen disposed in the middle of the housing, a PLC controller disposed inside the housing, the PLC controller being electrically connected to the operation panel and the display screen respectively; a backlight and a precision alignment platform disposed on the inner side of the housing, a correction component disposed on the top of the precision alignment platform, and a testing component disposed on the top of the inner side of the housing; The correction assembly includes a placement platform, a miniature linear module, an L-shaped shift finger, and a sapphire plate. The placement platform is located on top of the precision alignment platform. Six sets of miniature linear modules are arranged radially on the top of the placement platform. The output end of each miniature linear module is fixedly connected to an L-shaped shift finger. A miniature force sensor is provided on the surface of the L-shaped shift finger. A sapphire plate is fixedly connected to the middle of the placement platform.

[0008] Preferably, the detection assembly includes a mechanical loading spindle, a main camera, a 3D contour scanner, a pressure sensor, and a test head. The mechanical loading spindle is located at the top of the inner side of the housing and is used to provide a vertical loading driving force. The main camera and the 3D contour scanner are located in the middle of the mechanical loading spindle to acquire planar contour and three-dimensional morphology data of the sample. The test head is slidably connected to one end of the mechanical loading spindle away from the inner side of the housing. A sliding groove is formed in the middle of the mechanical loading spindle, and the test head is slidably connected inside the sliding groove. A pressure sensor is located in the middle of the mechanical loading spindle and is located at the top of the test head. The top surface of the test head is in contact with the sensing surface of the pressure sensor, so that after the test head is subjected to force upon contact with the sample, it generates a relative displacement along the sliding groove and presses against the pressure sensor.

[0009] Preferably, a motor is provided on the top of the precision alignment platform, and the output end of the motor is fixedly connected to the bottom of the placement table. The precision alignment platform and the motor are electrically connected to the PLC controller to drive the placement table to rotate in order to cooperate with the vision system for angle alignment. A protective door is provided in the middle of the housing.

[0010] Preferably, the micro linear module, the micro force sensor, the mechanical loading spindle, the main camera, the 3D contour scanner, and the pressure sensor are electrically connected to the PLC controller.

[0011] Preferably, the miniature linear module is arranged in a star-shaped radial pattern, the L-shaped shift finger is located at the inner end of the radial line, the inner side of the L-shaped shift finger forms the contact correction surface of the edge of the part to be tested, and the miniature force sensor is integrated into the contact correction surface.

[0012] A second aspect of the present invention provides an integrated testing system for the mechanical properties of easily deformable new material parts, applicable to the aforementioned integrated testing equipment for the mechanical properties of easily deformable new material parts, comprising: The shape recognition and positioning module is used to control the backlight to turn on in order to assist the main camera in acquiring the initial image of the part placed on the sapphire plate, and to calculate the deviation data between the geometric center of the part and the center of the precision alignment platform. An adaptive correction module is used to analyze the amount of curling deformation at the edge of the part based on the initial image and independently calculate the feed distance of the six sets of micro linear modules; The mechanical data acquisition and analysis module is used to control the mechanical loading spindle to perform test actions and simultaneously acquire the force data fed back by the pressure sensor and the displacement data of the mechanical loading spindle.

[0013] Preferably, the adaptive correction module performs the following steps: establishing a standard contour model of the part, performing edge extraction processing on the initial image to obtain a real-time contour, and registering the real-time contour with the standard contour model; calculating the radial deviation vectors of the six L-shaped shift fingers; when the radial deviation vector of the target orientation is detected to point to the center of the placement platform, generating a corresponding drive signal to control the micro linear module of the target orientation to drive the L-shaped shift fingers to move outward along the radial direction until the radial deviation vector of the target orientation is within the preset tolerance range.

[0014] Preferably, the adaptive correction module monitors the feedback value of the micro force sensor in real time during the movement of the micro linear module; when the feedback value of the micro force sensor reaches a preset force threshold, or when the main camera detects that the edge contour of the part has been stretched, the adaptive correction module controls the corresponding micro linear module to stop moving and maintain its current position, thereby avoiding physical damage to easily deformable materials.

[0015] Preferably, the mechanical data acquisition and analysis module performs the following steps: after the adaptive correction module completes the correction action, it controls the mechanical loading spindle to drive the test indenter downward; when the test indenter contacts the target to be tested, the test indenter moves upward relative to the sliding groove and contacts the sensing surface of the pressure sensor; the timestamp, the axial displacement of the mechanical loading spindle, and the force value change of the pressure sensor are recorded synchronously according to a preset sampling frequency; the stress-strain curve is plotted based on the recorded data, and the elastic modulus and yield strength of the material are calculated.

[0016] Preferably, the system further performs a three-dimensional shape compensation step, which includes: before the test indenter performs the pressing action, controlling the 3D contour scanner to scan the corrected part surface to obtain the flatness data of the part surface; calculating the correction coefficient of the effective contact area based on the flatness data; and using the correction coefficient to perform weighted compensation on the force value data collected by the pressure sensor to obtain the corrected mechanical performance data.

[0017] Preferably, the system further includes a data storage unit, which is used to bind and store the image data and mechanical data of each detection; the display screen is used to display in real time the correction process image captured by the main camera, the real-time force state of the micro force sensor, and the mechanical performance curve generated by the test.

[0018] This invention provides an integrated testing device and system for the mechanical properties of easily deformable new material parts. It has the following beneficial effects: 1. This invention uses six sets of micro linear modules arranged radially on the top of the placement platform and L-shaped dials as the actuators. Based on the radial deviation data recognized by vision, the dials in each position can be independently driven to move outward along the radial direction. Combined with the flat surface of the sapphire plate, it can automatically flatten new material parts with curled edges or irregular deformation. This solves the problem that easily deformable materials are difficult to maintain a standard plane in their natural state, thus affecting the test results and ensuring the consistency of geometric boundary conditions during mechanical testing.

[0019] 2. This invention employs a sliding connection design between the test indenter and the mechanical loading spindle in the detection component, and places the pressure sensor between the top of the test indenter and the spindle. During the test compression process, the test indenter first contacts the sample and moves upward relative to it along the sliding groove before triggering the pressure sensor. The floating contact structure effectively isolates the axial inertial impact generated by the mechanical loading spindle during high-speed drive, ensuring that the data collected by the pressure sensor is only the stress feedback of the material itself, thus improving the accuracy of low force measurement for soft or thin film materials.

[0020] 3. This invention integrates an adaptive protection mechanism based on micro force sensors and main vision in the correction process. When the system drives the L-shaped finger to flatten the part, it monitors the contact force value and the tensile state of the edge contour in real time. Once the force value exceeds the limit or the contour is overstretched, the feed stops. Through dual feedback logic, it avoids the mechanical correction force from being too large, which may cause tearing, perforation or unexpected plastic deformation of the easily deformable new material parts, thus ensuring the integrity of the sample before entering the destructive mechanical testing stage. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the corrective component structure of the present invention; Figure 4 This is a schematic cross-sectional view of the mechanical loading spindle of the present invention; Figure 5 This is a schematic cross-sectional view of the precision alignment platform of the present invention; Figure 6 This is a schematic cross-sectional view of the miniature linear module of the present invention; Figure 7 This is a schematic diagram of the system functional architecture of the present invention.

[0022] The components include: 1. Housing; 2. Control panel; 3. Display screen; 4. Protective door; 5. Backlight; 6. Mechanical loading spindle; 7. Main camera; 8. 3D contour scanner; 9. Pressure sensor; 10. Test head; 11. Sliding groove; 12. Precision alignment platform; 13. Placement stage; 14. Miniature linear module; 15. L-shaped dial; and 16. Sapphire plate. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 6This invention provides an integrated testing device for the mechanical properties of easily deformable new material parts, including a housing 1, an operation panel 2 and a display screen 3 in the middle of the housing 1, a PLC controller inside the housing 1, the PLC controller being electrically connected to the operation panel 2 and the display screen 3, a backlight 5 inside the housing 1, a precision alignment platform 12 inside the housing 1, a correction component on the top of the precision alignment platform 12, and a testing component inside the housing 1. The correction assembly includes a placement platform 13, a miniature linear module 14, an L-shaped dial 15, and a sapphire plate 16. The placement platform 13 is located on top of the precision alignment platform 12. Six sets of miniature linear modules 14 are arranged radially on the top of the placement platform 13. The output end of the miniature linear module 14 is fixedly connected to an L-shaped dial 15. A miniature force sensor is provided on the surface of the L-shaped dial 15. The sapphire plate 16 is fixedly connected to the middle of the placement platform 13.

[0025] Specifically, the housing 1 provides a closed and stable installation environment for the internal components, while the PLC controller centrally controls the operation panel 2 and display screen 3 to achieve real-time transmission of human-machine interaction data. The precision alignment platform 12 provides high-precision position adjustment support for the placement stage 13, enabling the stage 13 to drive the components on it to move precisely in alignment. Simultaneously, the supported placement stage 13 provides a rigid foundation for the sapphire plate 16, utilizing the high flatness of the sapphire plate 16 to provide a standard optical and mechanical reference plane for easily deformable new material parts. Furthermore, the placement stage 13 provides a mounting carrier for the radially distributed micro linear modules 14, allowing the micro linear modules 14 to stably drive the L-shaped dial 15 to reciprocate radially. Through the cooperation of the L-shaped dial 15 and the micro force sensor, the contact force value can be sensed in real time during physical contact and flattening of the part's edge, ensuring that part curling deformation is effectively eliminated while avoiding damage to the part. This allows the part under test to be tested in a flat state for subsequent mechanical property testing, thereby improving the accuracy and repeatability of the test data.

[0026] Please see the appendix Figure 2 - Appendix Figure 5In a preferred embodiment of the present invention, the detection assembly includes a mechanical loading spindle 6, a main camera 7, a 3D contour scanner 8, a pressure sensor 9, and a test head 10. The mechanical loading spindle 6 is disposed on the top inner side of the housing 1. The main camera 7 and the 3D contour scanner 8 are disposed in the middle of the mechanical loading spindle 6. The test head 10 is slidably connected to one end of the mechanical loading spindle 6 away from the inner side of the housing 1. A sliding groove 11 is formed in the middle of the mechanical loading spindle 6. The test head 10 is slidably connected in the middle of the sliding groove 11. The pressure sensor 9 is disposed in the middle of the mechanical loading spindle 6. The pressure sensor 9 is located on the top of the test head 10, and the top surface of the test head 10 is in contact with the sensing surface of the pressure sensor 9.

[0027] Specifically, the housing 1 provides a stable mounting base for the mechanical loading spindle 6, enabling it to stably perform axial loading actions. Simultaneously, the mechanical loading spindle 6 supports the main camera 7 and the 3D contour scanner 8, allowing them to move synchronously and stably with the spindle, thus acquiring real-time image information and three-dimensional topographic data of the area under test. Furthermore, the sliding groove 11 on the mechanical loading spindle 6 provides guiding support for the test indenter 10, allowing it to slide stably within the groove, forming a floating connection structure. Through the contact between the top surface of the test indenter 10 and the sensing surface of the pressure sensor 9, the test indenter 10 accurately transmits pressure to the pressure sensor 9 after contacting the object under test, enabling the pressure sensor 9 to stably collect force data. This structure effectively isolates the influence of the driving mechanism's motion inertia on the measurement results, making the detection of minute forces on easily deformable new materials more accurate.

[0028] In a preferred embodiment of the present invention, a motor is provided on the top of the precision alignment platform 12, and the output end of the motor is fixedly connected to the bottom of the placement platform 13. The precision alignment platform 12 and the motor are electrically connected to the PLC controller, and a protective door 4 is provided in the middle of the housing 1. The micro linear module 14, the micro force sensor, the mechanical loading spindle 6, the main camera 7, the 3D contour scanner 8, and the pressure sensor 9 are electrically connected to the PLC controller.

[0029] Specifically, the precision alignment platform 12 provides a stable mounting base for the motor, enabling stable operation. Simultaneously, the mounted motor provides rotational drive to the placement stage 13, allowing for high-precision angle adjustment. This, in conjunction with the vision system, completes the alignment of the parts. Meanwhile, the housing 1 supports the protective door 4, ensuring stable opening and closing, thus providing a closed and safe environment during inspection, preventing external interference and ensuring operator safety. Electrical connections between the PLC controller and the micro linear module 14, micro force sensor, mechanical loading spindle 6, main camera 7, 3D contour scanner 8, and pressure sensor 9 enable high-speed data interaction and coordinated action among these components. This achieves fully automated control of the entire process, from part shape recognition and adaptive correction to mechanical performance testing, ensuring the stability of the inspection equipment and the synchronization of data acquisition.

[0030] Please see the appendix Figure 7 In a preferred embodiment of the present invention, the integrated mechanical property testing system for easily deformable new material parts includes: a shape recognition and positioning module, an adaptive correction module, and a mechanical data acquisition and analysis module. The shape recognition and positioning module controls the backlight 5 to turn on, controls the main camera 7 to acquire an initial image of the part placed on the sapphire plate 16, and calculates the deviation data between the geometric center of the part and the center of the precision alignment platform 12. The adaptive correction module analyzes the curling deformation of the part's edges based on the initial image and independently calculates the feed distance of the six sets of micro linear modules 14. The mechanical data acquisition and analysis module controls the mechanical loading spindle 6 to perform test actions and simultaneously acquires the force data fed back by the pressure sensor 9 and the displacement data of the mechanical loading spindle 6.

[0031] Specifically, the shape recognition and positioning module controls the backlight 5 to enhance the contrast of the part outline on the sapphire plate 16, while simultaneously controlling the main camera 7 to acquire a clear initial image. This allows the module to accurately calculate the center deviation between the part and the precision alignment platform 12 based on high-quality image data, providing a precise data foundation for subsequent physical alignment. The adaptive correction module analyzes the initial image to quantify the curling deformation of the part's edges, providing independent feed distance parameters for the six sets of micro-linear modules 14. This allows the micro-linear modules 14 to perform targeted actions based on actual deformation, achieving precise flattening of the part. The mechanical data acquisition and analysis module controls the mechanical loading spindle 6 to ensure stable execution of the test action. Simultaneously, it acquires force data from the pressure sensor 9 and displacement data from the mechanical loading spindle 6, ensuring precise time alignment between the mechanical and displacement data. This guarantees the accuracy of subsequent stress and strain curve plotting and elastic modulus calculation, enabling the detection system to output reliable mechanical performance analysis results.

[0032] In a preferred embodiment of the present invention, the adaptive correction module performs the following steps: First, a standard contour model of the part is established, and edge extraction processing is performed on the initial image to obtain the real-time contour, and then the real-time contour is registered with the standard contour model; then, the radial deviation vector of the six L-shaped dials 15 is calculated; when the radial deviation vector of the target orientation is detected to point to the center of the placement platform 13, a corresponding drive signal is generated to control the micro linear module 14 of the target orientation to start, driving the L-shaped dials 15 to move outward along the radial direction until the radial deviation vector of the target orientation enters the preset tolerance range. During this process, the adaptive correction module monitors the feedback value of the micro force sensor in real time; once the feedback value of the micro force sensor reaches the preset force threshold, or the main camera 7 detects that the edge contour of the part has undergone overstretching deformation, the adaptive correction module immediately controls the corresponding micro linear module 14 to stop moving and maintain the current position.

[0033] Specifically, by establishing a standard contour model and performing edge extraction and registration on the initial image, the difference between the actual edge and the theoretical shape of the part is digitally presented, thus providing a precise geometric basis for subsequent correction path planning. By calculating the radial deviation vector, the six sets of micro linear modules 14 can identify the specific location of the action required. Simultaneously, the micro linear modules 14 drive the L-shaped finger 15 to move outward, allowing the L-shaped finger 15 to apply a directional flattening thrust to the inward-curling edge of the part, thereby physically eliminating the curling deformation of the part. By monitoring the feedback values ​​of the micro force sensor in real time during the movement, the applied force value for correction is always under safe monitoring. Combined with the visual monitoring of edge contour stretching deformation by the main camera 7, the adaptive correction module can promptly interrupt the drive when the physical contact force is too large or the geometric deformation exceeds the limit, thereby preventing tearing, perforation, or permanent plastic deformation of easily deformable new material parts during the flattening process. This effectively protects the physical integrity of the sample and ensures the validity of subsequent mechanical testing data.

[0034] Furthermore, when calculating the radial deviation vector of the six L-shaped shift fingers 15, the adaptive correction module quantifies the motion of each group of micro linear modules 14 based on the polar coordinate system. The radial deviation calculation model is as follows: ; in: Indicates the first The part numbers of the miniature linear module 14 and the L-shaped dial finger 15 are within the range of [value range missing]. ; Indicates the first The radial deviation scalar of each group of miniature linear modules in 14 directions, when When it is determined that there is inward curling in that direction, it needs to be flattened outward; Indicates the geometric center coordinates of the placement platform 13 and the sapphire plate 16; The standard contour model is represented in the first... The theoretical edge point coordinates on the corresponding angle ray of the miniature linear module 14 and the L-shaped dial 15; This indicates that after edge extraction, the initial image at the th... The actual edge point coordinates on the corresponding angle ray of the miniature linear module 14 and the L-shaped dial 15.

[0035] Furthermore, during the movement of the micro linear module 14, the adaptive correction module employs the following logical discrimination function. To control the first in real time The module stops to protect easily deformable materials. ; in: Indicates the first The control signal status of the miniature linear module 14, when When this happens, the system executes a stop command, controlling the module to immediately stop moving and lock its current position; when At that time, the system executes motion commands to control the module to continue its outward feeding motion along the radial direction; This indicates a conditional statement; when the logical expression within the parentheses evaluates to true, the corresponding assignment is performed. The "otherwise" flag indicates that, if the above... If none of the subsequent logical conditions are met, the corresponding assignment is executed. Indicates the first The real-time contact force value is fed back by a miniature force sensor on the surface of an L-shaped finger 15. This indicates a preset safety force threshold value used to prevent mechanical damage; This represents the logical OR operator, which means that stopping is triggered as long as either condition is met. This indicates the first time the main camera 7 detected... The real-time curvature radius of the 14-directional edges of the miniature linear module is used to characterize the tensile deformation state. This represents the preset minimum radius of curvature threshold. When the real-time radius of curvature is less than this value, it is determined that overstretching deformation has occurred. express Time of the first Real-time residual radial deviation of a miniature linear module in 14 directions; This indicates the preset alignment tolerance range.

[0036] Specifically, through the above formula Through calculations, the system can accurately determine the specific value of part curling in each radial direction, thus providing a precise feed target for the linear module and avoiding blind stretching. Simultaneously, through logical discrimination functions... The construction of the mechanical sensor data Visual morphology data and positional deviation data This is integrated into a unified control decision model. As long as any one of the following conditions is met (i.e., force exceeding limits, abnormal deformation, or alignment completion), it will be applicable. If the logic is met, the system immediately outputs a 1 signal to lock the module position; however, during normal correction (i.e., if the above limit is not reached)... The system maintains an output O signal to continuously flatten the material. This multi-parameter constrained control strategy fundamentally solves the technical problem of soft new materials being easily damaged in automated testing.

[0037] The mechanical data acquisition and analysis module performs the following steps: After the adaptive correction module completes the correction action, it controls the mechanical loading spindle 6 to drive the test indenter 10 downwards, so that the test indenter 10 contacts the target to be tested; then the test indenter 10 moves upwards along the sliding groove 11 and contacts the sensing surface of the pressure sensor 9; next, it synchronously records the timestamp, the axial displacement of the mechanical loading spindle 6, and the force value change of the pressure sensor 9 according to the preset sampling frequency; finally, it plots the stress-strain curve based on the recorded data and calculates the elastic modulus and yield strength of the material. In addition, the system also performs a three-dimensional shape compensation step, specifically including: before the test indenter 10 performs the downward action, it controls the 3D contour scanner 8 to scan the surface of the corrected part to obtain the flatness data of the part surface; it calculates the correction coefficient of the effective contact area based on the flatness data; and it uses the correction coefficient to perform weighted compensation on the force value data collected by the pressure sensor 9, thereby generating the final mechanical performance test report.

[0038] Specifically, the test indenter 10 is initiated by controlling the mechanical loading spindle 6 to drive it downwards. Through the sliding engagement of the test indenter 10 within the sliding groove 11, it generates an independent buffer displacement relative to the mechanical loading spindle 6 upon contact with the target. This effectively isolates and eliminates the inertial impact generated by the high-speed movement of the drive mechanism before contact with the pressure sensor 9, resulting in more accurate initial force data collected by the pressure sensor 9 and preventing false triggering or spurious stress peaks. By synchronously recording timestamps, displacement, and force changes, stress and strain data are strictly aligned on the time axis, ensuring that the plotted stress-strain curve accurately reflects the material's mechanical response process. Simultaneously, the 3D contour scanner 8 acquires the corrected surface flatness data of the part, digitally characterizing the microscopic morphological differences on the part's surface. Based on this data, the effective contact area correction coefficient under actual pressure can be accurately calculated. By using this correction coefficient to weight and compensate the original force data, the final test report can correct the stress calculation error caused by surface micro-unevenness, thereby making the assessment of the elastic modulus and yield strength of easily deformable new materials closer to the intrinsic properties of the material, and improving the scientificity and reliability of the test results.

[0039] Furthermore, to accurately eliminate measurement errors caused by the microscopic unevenness of the surface of the easily deformable new material, the mechanical data acquisition and analysis module employs a surface morphology-based correction algorithm. First, based on the point cloud data acquired by the 3D contour scanner 8, a correction coefficient for the effective contact area is calculated. The calculation formula is as follows: ; in: The correction factor represents the effective contact area and has a value range of (0,1]. This indicates the total number of scanned point clouds within the projection area of ​​test head 10; This represents the index of the sampling point in the scanned point cloud, with a value range of 1. ; Indicates the first The vertical height value of each sampling point; The arithmetic mean of the heights of all sampling points is used to characterize the reference plane; That is, the root mean square height deviation ( ), used to quantify the flatness data of the part surface; This represents a preset reference value for the material's characteristic thickness, used to normalize height deviation. The fill factor constant, representing the micro-texture of the contact surface, is determined by the material composition.

[0040] Based on the above correction coefficients The system converts the raw force data collected by the pressure sensor 9 to generate compensated stress values ​​for plotting the final stress-strain curve. The compensation model is as follows: ; in: express The actual stress value after three-dimensional topography compensation at any given moment; express The raw force data collected by pressure sensor 9 at all times; This indicates the nominal contact area at the bottom of the test head 10; This represents the equivalent effective contact area after correction of the scanned data.

[0041] Specifically, by introducing the root mean square height deviation (RMS height deviation) As a quantitative indicator of flatness, a correction coefficient is constructed. This allows for a mathematical characterization of the impact of minute wrinkles or unevenness on the surface of a part on the contact area. In calculating stress... At that time, use the correction factor For nominal area The reduction correction effectively increases the calculated stress value, thus restoring the true stress that the material actually experiences in the microscopic contact area. This compensation mechanism effectively solves the technical problem of low calculated modulus for easily deformable materials due to macroscopic virtual contact, ensuring that the final mechanical property test report truly reflects the intrinsic mechanical properties of the material.

[0042] In a preferred embodiment of the present invention, the integrated mechanical property testing system for easily deformable new material parts further includes a data storage unit. The data storage unit is used to bind and store the image data and mechanical data generated from each test. The display screen 3 is used to display in real time the correction process images captured by the main camera 7, the real-time force state of the micro-force sensor, and the mechanical property curves generated by the test.

[0043] Specifically, image and mechanical data are bound and stored together through a data storage unit, establishing a unique logical link between visual morphological information and physical mechanical information in each testing process. This constructs a complete test archive, providing a reliable basis for subsequent tracing and verification of abnormal data. The real-time display screen 3 shows images of the correction process captured by the main camera 7, allowing operators to intuitively monitor the automated leveling process. Simultaneously, it displays the force state of the micro-force sensors, making the subtle mechanical interactions within the equipment transparent and ensuring real-time control of the system's operating status. Furthermore, the display screen 3 shows mechanical performance curves, instantly transforming complex test data into intuitive charts, enabling operators to quickly determine whether material properties meet standards, thus improving the efficiency of testing and the speed of on-site decision-making.

[0044] Working principle: When the inspection of easily deformable new material parts begins, the PLC controller first activates the backlight 5 and controls the main camera 7 to acquire the initial image of the part placed on the sapphire plate 16. The PLC controller calculates the deviation data between the geometric center of the part and the center of the precision alignment platform 12 through image processing algorithms, and controls the precision alignment platform 12 and the motor to complete the basic alignment of the part. Subsequently, the PLC controller extracts the edges of the initial image and establishes a standard contour model, calculates the radial deviation vector of the six L-shaped dial fingers 15. When the radial deviation vector of the target position is detected to point to the center of the placement table 13, the PLC controller generates a drive signal to control the corresponding micro linear module 14 to start, driving the L-shaped dial fingers 15 to move outward along the radial direction. The curled edges of the part are unfolded outward by physical contact until the radial deviation vectors of each position are within the preset tolerance range, thereby realizing the automatic flattening of the part.

[0045] During the above correction process, in order to prevent damage to easily deformable materials, the contact force value is monitored in real time by a micro force sensor on the surface of the L-shaped finger 15, and the edge contour shape is monitored in real time by the main camera 7. When the PLC controller receives the feedback value from the micro force sensor and reaches the preset threshold, or when visual recognition detects that the edge of the part has been stretched, it will immediately control the corresponding micro linear module 14 to stop moving and maintain its current position. The sample safety is ensured through the dual feedback mechanism of force and vision. After the correction is completed, the PLC controller controls the 3D contour scanner 8 to scan the surface of the part, obtain flatness data and calculate the correction coefficient of the effective contact area to prepare for subsequent data processing.

[0046] When entering the mechanical performance testing stage, the PLC controller controls the mechanical loading spindle 6 to drive the test head 10 downward. After the test head 10 contacts the surface of the part to be tested, it overcomes gravity and moves upward relative to the sliding groove 11, and contacts the sensing surface of the pressure sensor 9, thereby eliminating the interference of driving inertia on the initial force value. During this process, the PLC controller synchronously records the axial displacement of the mechanical loading spindle 6 and the force value change of the pressure sensor 9 at a preset frequency, and performs weighted compensation on the data in combination with the previously calculated correction coefficient. Finally, the stress and strain curves are plotted and the elastic modulus and yield strength of the material are calculated. The test results and process images are displayed on the display screen 3 in real time and stored in the data storage unit.

Claims

1. An integrated testing device for the mechanical properties of easily deformable new material parts, comprising a housing (1), characterized in that, An operation panel (2) is provided in the middle of the housing (1), a display screen (3) is provided in the middle of the housing (1), a PLC controller is provided inside the housing (1), the PLC controller and the operation panel (2) and the display screen (3) are electrically connected respectively, a backlight (5) is provided inside the housing (1), a precision alignment platform (12) is provided inside the housing (1), a correction component is provided on the top of the precision alignment platform (12), and a detection component is provided inside the housing (1). The correction component includes a placement platform (13) which is located on top of the precision alignment platform (12). The top of the placement platform (13) is provided with six sets of miniature linear modules (14), which are radially distributed on the top of the placement platform (13). The output end of the miniature linear module (14) is fixedly connected to an L-shaped dial (15), and a miniature force sensor is provided on the surface of the L-shaped dial (15). A sapphire plate (16) is fixedly connected to the middle of the placement platform (13).

2. The integrated testing equipment for the mechanical properties of easily deformable new material parts according to claim 1, characterized in that, The detection assembly includes a mechanical loading spindle (6), which is located on the top of the inner side of the housing (1). A main camera (7) and a 3D contour scanner (8) are located in the middle of the mechanical loading spindle (6). A test head (10) is slidably connected to one end of the mechanical loading spindle (6) away from the inner side of the housing (1). A sliding groove (11) is opened in the middle of the mechanical loading spindle (6). The test head (10) is slidably connected in the middle of the sliding groove (11). A pressure sensor (9) is located in the middle of the mechanical loading spindle (6). The pressure sensor (9) is located on the top of the test head (10). The top surface of the test head (10) is in contact with the sensing surface of the pressure sensor (9).

3. The integrated testing equipment for the mechanical properties of easily deformable new material parts according to claim 1, characterized in that, The precision alignment platform (12) is equipped with a motor on top, and the output end of the motor is fixedly connected to the bottom of the placement platform (13). The precision alignment platform (12) and the motor are electrically connected to the PLC controller respectively. A protective door (4) is provided in the middle of the housing (1).

4. The integrated testing equipment for the mechanical properties of easily deformable new material parts according to claim 1, characterized in that, The micro linear module (14), micro force sensor, mechanical loading spindle (6), main camera (7), 3D contour scanner (8) and pressure sensor (9) are electrically connected to the PLC controller.

5. An integrated testing system for the mechanical properties of easily deformable new material parts, characterized in that, An integrated testing device for the mechanical properties of easily deformable new material parts as described in any one of claims 1-4, comprising: The shape recognition and positioning module is used to control the backlight (5) to turn on, control the main camera (7) to acquire the initial image of the part placed on the sapphire plate (16), and calculate the deviation data between the geometric center of the part and the center of the precision alignment platform (12). An adaptive correction module is used to analyze the amount of curling deformation of the part edge based on the initial image and independently calculate the feed distance of the six sets of micro linear modules (14); The mechanical data acquisition and analysis module is used to control the mechanical loading spindle (6) to perform test actions and simultaneously acquire the force data fed back by the pressure sensor (9) and the displacement data of the mechanical loading spindle (6).

6. The integrated testing system for the mechanical properties of easily deformable new material parts according to claim 5, characterized in that, The adaptive correction module performs the following steps: A standard contour model of the part is established, and edge extraction processing is performed on the initial image to obtain a real-time contour. The real-time contour is then registered with the standard contour model. Calculate the radial deviation vectors of the six L-shaped shift fingers (15) in the orientation; When the radial deviation vector of the target orientation is detected to point to the center of the placement platform (13), a corresponding drive signal is generated to control the micro linear module (14) of the target orientation to drive the L-shaped dial (15) to move outward along the radial direction until the radial deviation vector of the target orientation is within the tolerance range.

7. The integrated mechanical property testing system for easily deformable new material parts according to claim 6, characterized in that, The adaptive correction module monitors the feedback value of the micro force sensor in real time during the movement of the micro linear module (14); When the feedback value of the micro force sensor reaches the force threshold, or when the main camera (7) detects that the edge contour of the part has been stretched, the adaptive correction module controls the corresponding micro linear module (14) to stop moving and maintain its current position.

8. The integrated testing system for the mechanical properties of easily deformable new material parts according to claim 5, characterized in that, The mechanical data acquisition and analysis module performs the following steps: After the adaptive correction module completes the correction action, it controls the mechanical loading spindle (6) to drive the test head (10) to press down. The test head (10) contacts the target to be tested. The test head (10) moves up along the sliding groove (11) and contacts the sensing surface of the pressure sensor (9). The timestamp, the axial displacement of the mechanical loading spindle (6), and the force change of the pressure sensor (9) are recorded synchronously according to the sampling frequency. Based on the recorded data, stress-strain curves are plotted, and the elastic modulus and yield strength of the material are calculated.

9. The integrated testing system for the mechanical properties of easily deformable new material parts according to claim 8, characterized in that, The system also performs a three-dimensional topography compensation step, which includes: Before the test indenter (10) performs the pressing action, the 3D contour scanner (8) is controlled to scan the corrected part surface to obtain the flatness data of the part surface; The correction factor for the effective contact area is calculated based on the flatness data; The force data collected by the pressure sensor (9) is weighted and compensated using the correction coefficient to generate the final mechanical performance test report.

10. The integrated testing system for the mechanical properties of easily deformable new material parts according to claim 5, characterized in that, It also includes a data storage unit, which is used to bind and store the image data and mechanical data of each detection. The display screen (3) is used to display in real time the correction process image captured by the main camera (7), the real-time force state of the micro force sensor, and the mechanical performance curve generated by the test.

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