Material tensile testing device based on sensor fusion technology
By introducing a multi-stage buffer structure and electric push rod control into the material tensile testing device, the problems of sensor susceptibility to vibration interference and unstable connection were solved, and long-term stable and high-precision material tensile testing was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN ZHICHENG INSTR CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-24
AI Technical Summary
Existing tensile testing devices for materials have deficiencies in the connection stability and anti-interference of the sensor and the tensile loading structure. The sensor is susceptible to mechanical vibration and rigid impact, which leads to signal noise mixing and shortened lifespan. The buffer structure lacks a pre-detection mechanism, affecting the test accuracy and stability.
A multi-stage buffer structure consisting of a rubber damping sleeve, damping shell, tension rod, and damping spring is adopted. Combined with an electric push rod and controller, the aging of the buffer components is identified in advance, and the feedback data is detected by sensors to ensure connection stability and test accuracy.
It effectively reduces the impact of mechanical vibration and shock on the sensor, extends the sensor's lifespan, ensures the accuracy and stability of test data, and avoids interruptions caused by buffer failure.
Smart Images
Figure CN224552918U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensor fusion technology, and more specifically, to a material tensile testing device based on sensor fusion technology. Background Technology
[0002] In the field of industrial inspection and intelligent sensing, sensor fusion technology refers to the fusion processing of information collected by multiple types of sensors (such as tensile sensors, displacement sensors, strain sensors, etc.) through algorithms or hardware collaboration to obtain more accurate, comprehensive and robust characteristic data of the measured object. It is widely used in scenarios such as material performance testing and structural health monitoring. In the mechanical property testing of materials, the tensile test is the core means to evaluate key indicators such as tensile strength and elastic modulus of materials. It is necessary to accurately obtain parameters such as tensile force, deformation and stress-strain relationship, which creates a natural demand for sensor fusion technology.
[0003] However, existing tensile testing devices for materials have deficiencies in the connection stability and anti-interference capabilities between sensors and tensile loading structures. In traditional devices, sensors are often rigidly attached directly to the hooks of the tensile loading mechanism or simply fixed with bolts. When conducting tensile tests, the mechanical vibrations of the loading mechanism (such as motor start-stop and screw drive impacts) are directly transmitted to the sensors, causing high-frequency noise to be mixed into the signals collected by the sensors. At the same time, the rigid impact generated by the instantaneous loading of tensile force can easily damage the strain gauges and circuits inside the sensors due to instantaneous overload, shortening the sensor's lifespan. In addition, the buffer structure lacks a pre-detection mechanism and cannot identify problems such as aging of the damping pads and spring elasticity decay in advance. Once the buffer fails, it will directly affect the accuracy of the test data and even lead to test interruption, making it difficult to meet the requirements for long-term stable and high-precision tensile testing of materials. Utility Model Content
[0004] (a) Technical problems to be solved In view of the above situation and to overcome the defects of the prior art, this utility model provides a material tensile testing device based on sensor fusion technology, which aims to solve the problems in the background art.
[0005] (II) Technical Solution To achieve the above objectives, this application provides the following technical solution: a material tensile testing device based on sensor fusion technology, comprising a base, a tension frame and two movable frames fixedly connected to the upper surface of the base, ball bearings fixedly connected to the inner walls of both sides of the tension frame, and a threaded screw fixedly connected to the inner rings of the two ball bearings, a stepper motor fixedly connected to the middle of the inner top wall of the tension frame, a drive shaft fixedly connected to the output end of the stepper motor, a first bevel gear and a second bevel gear fixedly connected to the outer surface of the drive shaft and the outer surface of the middle part of the threaded screw, respectively, two movable seats threadedly connected to the outer surface of the threaded screw, and two limiting rods fixedly connected to the inner wall of the tension frame, each of the movable seats... Each seat has a rubber shock-absorbing sleeve fixedly connected to its inner wall. Each rubber shock-absorbing sleeve has a shock-absorbing shell fixedly connected to its inner wall. Each shock-absorbing shell has a tension rod slidably connected inside. Each shock-absorbing shell and the middle inner wall of the tension rod are both fixedly connected to a shock-absorbing spring. Each tension rod has a tension sensor at one end. Each tension sensor has a hook fixedly connected to its outer surface. Each movable frame has an electric push rod fixedly connected to its front side. Each electric push rod has a sliding seat fixedly connected to its telescopic end. Each sliding seat has a hanging ring fixedly connected to its top end. A controller is fixedly connected to the left side of the tension frame. The controller is electrically connected to the stepper motor, the tension sensor, and the electric push rod via wires.
[0006] The present invention is further configured such that two sets of limiting plates are fixedly connected to the bottom surface of the tensioning frame, each set of limiting plates consists of two plates, and each movable seat is located inside the two limiting plates.
[0007] The present invention is further configured such that the outer surface of the first bevel gear meshes with the outer surface of the second bevel gear, the two limiting rods are located on both sides of the positive and negative thread screw, and each limiting rod passes through the two moving seats and extends to the outside of the moving seats.
[0008] The present invention is further configured such that two telescopic shells are fixedly connected to the inner wall of each shock-absorbing shell, an inner liner is fixedly connected to the inner wall of each telescopic shell, a buffer rod is slidably connected inside each inner liner, and the end of each buffer rod near the tension rod is fixedly connected to one side of the tension rod.
[0009] The present invention is further configured such that each of the hanging rings is sleeved on the outside of the hook, and each of the hanging rings is located directly below the hook.
[0010] The present invention is further configured such that a first clamping plate is fixedly connected to one end of each of the two tension rods that are close to each other, the inner wall of each first clamping plate is in contact with the outer surface of the tension sensor, and a second clamping plate is fixedly connected to the upper surface of each first clamping plate by bolts, the inner wall of each second clamping plate is in contact with the outer surface of the tension sensor.
[0011] (III) Beneficial Effects Compared with the prior art, the beneficial effects of this utility model are: 1. Through the multi-stage buffer structure composed of rubber damping sleeve, damping shell, tension rod, and damping spring, the rubber damping sleeve can absorb the high-frequency vibration generated by the stepper motor drive. The sliding cooperation of the damping spring and tension rod in the damping shell can buffer the rigid impact of instantaneous loading of tensile force. The two work together to reduce the impact of mechanical vibration and impact on the tensile sensor, avoid the sensor signal from being mixed with noise or the internal components from being damaged due to overload, extend the sensor life, and solve the problem that the sensor is easily affected by vibration interference and impact damage in traditional devices. 2. The sliding seat is driven by an electric push rod to connect the hanging ring and the hook. Before the formal test, the stepper motor can be controlled to move the moving seat in the opposite direction to apply tension. The tension sensor detects the tension feedback. Combined with the controller to analyze the data, it can identify buffer failure problems such as the elastic decay of the shock-absorbing spring and the aging of the rubber shock-absorbing sleeve in advance. If the data is abnormal, an early warning will be issued to avoid the buffer failure from affecting the test accuracy or causing the test to be interrupted. With the first clamping plate and the second clamping plate, the tensile sensor is firmly clamped to ensure the sensor connection is stable and meets the requirements of long-term stable and high-precision testing. Attached Figure Description
[0012] Figure 1 This is a three-dimensional overall structural diagram of the present invention; Figure 2 This is a three-dimensional sectional view of the tensioning frame of this utility model; Figure 3 This is a three-dimensional structural diagram of the positive and negative thread screw of this utility model; Figure 4 This is a three-dimensional enlarged structural diagram of the hanging ring of this utility model; Figure 5 This is a three-dimensional structural diagram of the shock-absorbing shell of this utility model; Figure 6 This is a three-dimensional structural diagram of the first clamping plate of this utility model.
[0013] In the diagram: 1. Base; 2. Controller; 3. Moving frame; 4. Sliding seat; 5. Tension rod; 6. Moving seat; 7. Positive and negative threaded screw; 8. Limiting plate; 9. First clamping plate; 10. Second bevel gear; 11. Tension frame; 12. Limiting rod; 13. Ball bearing; 14. Stepper motor; 15. First bevel gear; 16. Electric push rod; 17. Drive shaft; 18. Tension sensor; 19. Rubber shock-absorbing sleeve; 20. Hanging ring; 21. Telescopic shell; 22. Inner liner; 23. Buffer rod; 24. Shock-absorbing shell; 25. Shock-absorbing spring; 26. Second clamping plate; 27. Hook. Detailed Implementation
[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0015] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0016] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0017] Please see Figures 1-6The system includes a base 1, with a tension frame 11 and two movable frames 3 fixedly connected to the upper surface of the base 1. Ball bearings 13 are fixedly connected to the inner walls of both sides of the tension frame 11. A threaded screw 7 is fixedly connected to the inner rings of the two ball bearings 13. A stepper motor 14 is fixedly connected to the middle of the inner top wall of the tension frame 11. A drive shaft 17 is fixedly connected to the output end of the stepper motor 14. A first bevel gear 15 and a second bevel gear 10 are fixedly connected to the outer surface of the drive shaft 17 and the outer surface of the middle part of the threaded screw 7, respectively. Two movable seats 6 are threadedly connected to the outer surface of the threaded screw 7. Two limiting rods 12 are fixedly connected to the inner wall of the tension frame 11. A rubber shock-absorbing sleeve 19 is fixedly connected to the inner wall of each movable seat 6. The inner wall of the rubber damping sleeve 19 is fixedly connected to the damping shell 24. The inside of each damping shell 24 is slidably connected to the tension rod 5. The inner wall of each damping shell 24 and the middle inner wall of the tension rod 5 are fixedly connected to the damping spring 25. One end of each tension rod 5 is provided with a tension sensor 18. The outer surface of each tension sensor 18 is fixedly connected to the hook 27. The front of each moving frame 3 is fixedly connected to the electric push rod 16. The telescopic end of each electric push rod 16 is fixedly connected to the sliding seat 4. The top of each sliding seat 4 is fixedly connected to the hanging ring 20. The left side of the tension frame 11 is fixedly connected to the controller 2. The controller 2 is electrically connected to the stepper motor 14, the tension sensor 18 and the electric push rod 16 through wires.
[0018] Specifically, the stepper motor 14 is started by the controller 2, and the drive shaft 17 drives the first bevel gear 15 to rotate. Because the first bevel gear 15 meshes with the second bevel gear 10, the positive and negative thread screw 7 rotates in the tension frame 11 through the ball bearing 13. The moving seat 6 moves along the positive and negative thread screw 7 and is restricted by the limiting rod 12. The moving seat 6 drives the rubber shock-absorbing sleeve 19, the shock-absorbing shell 24, and the tension rod 5 to move. Before the formal test, the electric push rod 16 pushes the sliding seat 4 to drive the hanging ring 20 to connect with the hook 27. The moving seat 6 is driven to move in the opposite direction by the stepper motor 14 to detect the effect of the preset tension. The tension sensor 18 detects the feedback data and analyzes it by the controller 2 to identify whether the shock-absorbing spring 25 and the rubber shock-absorbing sleeve 19 have failed. If the data is abnormal, an early warning is issued, which solves the problems of vibration interference and sensor damage in traditional devices.
[0019] Please see Figures 1-6 The bottom surface of the tension frame 11 is fixedly connected with two sets of limiting plates 8. Each set of limiting plates 8 consists of two plates, and each movable seat 6 is located inside the two limiting plates 8.
[0020] Specifically, when the movable seat 6 moves, the limiting plate 8 limits its two sides to prevent excessive movement distance and ensure safety during the stretching process.
[0021] Please see Figures 1-6The outer surface of the first bevel gear 15 meshes with the outer surface of the second bevel gear 10. Two limiting rods 12 are located on both sides of the positive and negative thread screw 7. Each limiting rod 12 passes through the two moving seats 6 and extends to the outside of the moving seats 6. Each hanging ring 20 is sleeved on the outside of the hook 27. Each hanging ring 20 is located directly below the hook 27.
[0022] Specifically, the first bevel gear 15 and the second bevel gear 10 mesh precisely to transmit power, ensuring efficient transmission of the positive and negative thread screws 7. The limit rod 12 passes through the moving seat 6 to enhance guidance. The hanging ring 20 is fitted directly below the hook 27 to facilitate the detection of tensile force feedback and increase the accuracy of the tensile test.
[0023] Please see Figures 1-6 Each shock-absorbing shell 24 has two telescopic shells 21 fixedly connected to its inner wall. Each telescopic shell 21 has an inner bushing 22 fixedly connected to its inner wall. Each inner bushing 22 has a buffer rod 23 slidably connected inside. The end of each buffer rod 23 near the tension rod 5 is fixedly connected to one side of the tension rod 5.
[0024] Specifically, when the tension rod 5 slides inside the shock-absorbing housing 24, the buffer rod 23 slides synchronously inside the inner bushing 22 of the telescopic housing 21, forming a multi-stage buffer in conjunction with the shock-absorbing spring 25, which enhances the absorption capacity of tensile impact, reduces the impact of vibration on the tensile sensor 18, and extends the service life of the sensor.
[0025] Please see Figures 1-6 Two tension rods 5 are fixedly connected to a first clamping plate 9 at their close ends. The inner wall of each first clamping plate 9 is in contact with the outer surface of the tension sensor 18. A second clamping plate 26 is fixedly connected to the upper surface of each first clamping plate 9 by bolts. The inner wall of each second clamping plate 26 is in contact with the outer surface of the tension sensor 18.
[0026] Specifically, the tensile sensor 18 is placed on the first clamping plate 9, and the second clamping plate 26 is fixed to the first clamping plate 9 by bolts, so that the tensile sensor 18 is firmly clamped, preventing the sensor from loosening during stretching, ensuring accurate data acquisition, and solving the problem of unstable sensor connection in traditional devices.
[0027] Working principle: The stepper motor 14 is started by the controller 2, and the drive shaft 17 drives the first bevel gear 15 to rotate. Because the first bevel gear 15 meshes with the second bevel gear 10, the threaded screw 7 rotates in the tension frame 11 through the ball bearing 13. The moving seat 6 moves along the threaded screw 7, guided by the limiting rod 12 and limited by both sides of the limiting plate 8 to ensure smooth movement and no overtravel. The moving seat 6 drives the rubber shock-absorbing sleeve 19, the shock-absorbing shell 24, and the tension rod 5 to move. Before the formal test, the electric push rod 16 pushes the sliding seat 4 to connect the hanging ring 20 with the hook 27. The moving seat 6 is driven to move in the opposite direction by the stepper motor 14 to detect the preset tension effect. The tension sensor 18 detects... The feedback data is analyzed by the controller 2 to identify whether the shock-absorbing spring 25 and the rubber shock-absorbing sleeve 19 have failed. If the data is abnormal, an early warning is issued. During the formal test, the hanging ring 20 is reset and the material to be tested is hung on it. The tensile force is transmitted with the stretching action. During the stretching, the rubber shock-absorbing sleeve 19 absorbs the vibration, and the shock-absorbing spring 25 and the tension rod 5 buffer the impact. The buffer rod 23 slides in the inner liner 22 of the telescopic shell 21 to enhance the buffering. The tension sensor 18 is firmly clamped by the first clamping plate 9 and the second clamping plate 26. The pull hook 27 ensures that the force is in the same direction, ensuring the stability of the sensor signal and the accuracy of the data. This solves the problems of undetected buffer failure, vibration interference, sensor damage and unstable connection in traditional devices.
[0028] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
Claims
1. A material tensile testing device based on sensor fusion technology, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to a tension frame (11) and two movable frames (3). Ball bearings (13) are fixedly connected to the inner walls of both sides of the tension frame (11). The inner rings of the two ball bearings (13) are fixedly connected to a screw (7). A stepper motor (14) is fixedly connected to the middle of the inner top wall of the tension frame (11). A drive shaft (17) is fixedly connected to the output end of the stepper motor (14). A first bevel gear (15) and a second bevel gear (10) are fixedly connected to the outer surface of the drive shaft (17) and the outer surface of the middle part of the screw (7). Two movable seats (6) are threadedly connected to the outer surface of the screw (7). Two limiting rods (12) are fixedly connected to the inner wall of the tension frame (11). A rubber shock-absorbing sleeve (19) is fixedly connected to the inner wall of each movable seat (6). The inner wall of each of the 19) is fixedly connected with a shock-absorbing shell (24). Each shock-absorbing shell (24) is slidably connected with a tension rod (5). The inner wall of each shock-absorbing shell (24) and the middle inner wall of the tension rod (5) are fixedly connected with a shock-absorbing spring (25). One end of each tension rod (5) is provided with a tension sensor (18). The outer surface of each tension sensor (18) is fixedly connected with a hook (27). The front of each of the moving frames (3) is fixedly connected with an electric push rod (16). The telescopic end of each electric push rod (16) is fixedly connected with a sliding seat (4). The top of each sliding seat (4) is fixedly connected with a hanging ring (20). The left side of the tension frame (11) is fixedly connected with a controller (2). The controller (2) is electrically connected to the stepper motor (14), the tension sensor (18) and the electric push rod (16) through wires respectively.
2. The material tensile testing device based on sensor fusion technology according to claim 1, characterized in that: The bottom surface of the tension frame (11) is fixedly connected to two sets of limiting plates (8), each set of limiting plates (8) consists of two plates, and each movable seat (6) is located inside the two limiting plates (8).
3. The material tensile testing device based on sensor fusion technology according to claim 1, characterized in that: The outer surface of the first bevel gear (15) meshes with the outer surface of the second bevel gear (10). The two limiting rods (12) are located on both sides of the positive and negative thread screw (7). Each limiting rod (12) passes through the two moving seats (6) and extends to the outside of the moving seats (6).
4. The material tensile testing device based on sensor fusion technology according to claim 1, characterized in that: Each of the shock-absorbing shells (24) has two telescopic shells (21) fixedly connected to its inner wall. Each of the telescopic shells (21) has an inner liner (22) fixedly connected to its inner wall. Each of the inner liner (22) has a buffer rod (23) slidably connected inside its interior. Each of the buffer rods (23) has one end near the tension rod (5) fixedly connected to one side of the tension rod (5).
5. The material tensile testing device based on sensor fusion technology according to claim 1, characterized in that: Each of the hooks (20) is fitted on the outside of the hook (27), and each of the hooks (20) is located directly below the hook (27).
6. The material tensile testing device based on sensor fusion technology according to claim 1, characterized in that: The two tension rods (5) are fixedly connected to a first clamping plate (9) at their close ends. The inner wall of each first clamping plate (9) is in contact with the outer surface of the tension sensor (18). The upper surface of each first clamping plate (9) is fixedly connected to a second clamping plate (26) by bolts. The inner wall of each second clamping plate (26) is in contact with the outer surface of the tension sensor (18).