Flexible strain sensor ductility experiment detection device

Abstract

The utility model discloses a flexible strain sensor ductility experiment detection device which comprises a base frame, an upper cover plate is arranged above the base frame, a through hole is formed in the center of the upper cover plate, a plurality of clamps are arranged on the upper surface of the upper cover plate and located on the periphery of the through hole, and an electric cylinder is fixedly installed below the upper cover plate and located on the base frame. According to the utility model, when the output shaft of the electric cylinder moves upwards, the pressure head can pass through the through hole and is pressed against the lower surface of the flexible strain sensor, so as to carry out a pressing experiment of a test material; the precision and observability of the experiment can be greatly improved through the camera and the laser displacement sensor, the whole test process can be recorded through the camera, the subsequent analysis and comparison of the experiment process are facilitated, and the displacement change of the sensor material can be accurately measured through the laser displacement sensor; and accurate data support is provided for experimental results.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible strain sensors, in particular to a flexible strain sensor ductility experimental detection device. Background Art

[0002] Flexible strain sensors can be attached to curved and dynamic bodies due to the characteristics of flexible materials, and can capture and monitor various human activities and health, and are used in human-machine interfaces, health monitoring, and electronic skin. During the use of flexible strain sensors, surface ductility plays an important role in the detection of its sensing signal, directly affecting the sensitivity of the flexible strain sensor and the detectable strain range. Therefore, the ductility of the flexible strain sensor directly affects the comprehensive performance of the flexible strain sensor.

[0003] At present, traditional ductility testing methods mainly rely on mechanical tensile testing machines to evaluate the ductility of materials, including simple stretch-to-fracture tests and cyclic stretch tests. Although these methods can provide basic stress-strain data, they are mainly limited to linear or single-direction stretching, and it is difficult to fully reflect the performance of flexible materials under complex strain conditions. Moreover, traditional tensile test equipment is usually bulky, complicated to operate, and expensive. These devices are suitable for general materials science research, but for the rapidly developing field of flexible electronics, these devices lack flexibility and accessibility, and it is difficult to meet the needs of rapid iteration and efficient performance evaluation.

[0004] To solve the above problems, this application proposes a flexible strain sensor ductility experimental detection device, which aims to provide a more comprehensive and accurate ductility test, while simplifying the testing process and reducing equipment costs, so as to better support the research and development and quality control needs in the field of flexible electronics. Utility Model Content

[0005] The utility model aims to provide a flexible strain sensor ductility experimental detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible strain sensor ductility experimental detection device, comprising a base frame, an upper cover plate for holding a flexible strain sensor material is arranged above the base frame, support rods are vertically arranged at the four corners of the frame, the upper cover plate is supported and fixed on the upper part of the base frame by the support rods, a through hole is opened at the center of the upper cover plate, and a plurality of clamps for fixing the flexible strain sensor material on the upper surface of the upper cover plate are arranged on the upper surface of the upper cover plate and around the through hole, and the flexible strain sensor material is fixed on the upper surface of the upper cover plate. After being placed on the upper surface of the upper cover plate and clamped with a clamp, the flexible strain sensor material covers the through hole, and an electric cylinder is fixedly installed on the base frame below the upper cover plate. The electric cylinder is fixed on the base frame in a vertical state, and the output shaft of the electric cylinder is located above the cylinder body of the electric cylinder. When the electric cylinder is running, the output shaft of the electric cylinder telescopes upward or downward, and a pressure head is installed at the end of the output shaft of the electric cylinder. When the output shaft of the electric cylinder moves upward, the pressure head can pass through the through hole and press on the lower surface of the flexible strain sensor to perform a top pressure experiment on the test material.

[0007] A flexible strain sensor ductility experimental detection device also includes a camera and a laser displacement sensor, and an upper bracket is fixedly installed on the side wall of the upper cover plate, and the upper bracket suspends and supports the camera and the laser displacement sensor just above the upper cover plate.

[0008] Preferably, the upper bracket includes a vertical rod and a horizontal rod, the vertical rod is connected to the side wall of the upper cover plate, one end of the horizontal rod is slidably sleeved on the side wall of the vertical rod, the angle of the horizontal rod is relatively fixed to the angle of the vertical rod, so that the horizontal rod only slides up and down on the vertical rod, a slider is slidably sleeved on the horizontal rod, the angle of the slider is relatively fixed to the angle of the horizontal rod, so that the slider only slides on the horizontal rod, the camera and the laser displacement sensor are fixed on the lower surface of the slider, and a locking bolt is respectively provided on one end of the horizontal rod close to the vertical rod and the side wall of the slider.

[0009] Preferably, a rotating seat is fixedly mounted on the side wall of the upper cover plate, a rotating block is fixedly sleeved on the side wall of the vertical rod, and the rotating block is rotatably connected to the inside of the rotating seat.

[0010] Preferably, a fixing block is fixedly installed on the side wall of the upper cover plate, and a push rod is slidably connected to the interior of the fixing block through a spring, the end of the push rod is in the shape of a hemispherical head, and a slot is opened on the side wall of the vertical rod, and the end of the push rod is movably connected to the inside of the slot.

[0011] Preferably, the clamp comprises a fixing bolt, the fixing bolt is meshedly connected to the upper surface of the upper cover plate, and a pressing plate for crimping the flexible strain sensor material is sleeved on the fixing bolt.

[0012] Preferably, a pressure sensor is fixedly installed between the pressure head and the electric rod. During the test, the electric cylinder drives the pressure head to move upward, and the pressure sensor is used to measure the pressure applied to the test material in real time.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: when the output shaft of the electric cylinder moves upward, the pressure head can pass through the through hole and press on the lower surface of the flexible strain sensor to carry out a top pressure experiment on the test material, and the camera and laser displacement sensor can greatly improve the accuracy and observability of the experiment. The camera can record the entire test process, which is convenient for subsequent analysis and comparison of the experimental process, and the laser displacement sensor can accurately measure the displacement change of the sensor material, providing accurate data support for the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure schematic diagram I of the utility model;

[0015] Figure 2 It is the overall structural schematic diagram II of the utility model;

[0016] Figure 3 FIG3 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 4 It is an exploded view of the upper cover plate, fixing bolts and pressure plate of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the upper cover plate, camera and laser displacement sensor of the utility model;

[0019] Figure 6 It is a cross-sectional exploded view of the vertical rod, rotating seat and rotating block of the utility model.

[0020] In the figure: 1, base frame, 2, electric cylinder, 3, pressure sensor, 4, pressure head, 5, upper cover plate, 501, through hole, 6, clamp, 601, fixing bolt, 602, pressure plate, 7, upper bracket, 701, vertical rod, 702, horizontal rod, 703, slider, 704, locking bolt, 8, camera, 9, laser displacement sensor, 10, rotating seat, 11, rotating block, 12, fixed block, 13, spring, 14, push rod, 15, slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-6 The utility model provides a technical solution: a flexible strain sensor ductility test device, comprising a base frame 1, and an upper cover plate 5 for holding the flexible strain sensor material is arranged above the base frame 1, such as Figure 1-3 As shown, support rods are vertically arranged at the four corners of the frame 1, and the upper cover plate 5 is supported and fixed on the upper part of the base frame 1 by the support rods. A through hole 501 is opened at the center of the upper cover plate 5, and a plurality of clamps 6 for fixing the flexible strain sensor material on the upper surface of the upper cover plate 5 are arranged around the through hole 501 on the upper surface of the upper cover plate 5, as shown in FIG. Figure 1 As shown, after the flexible strain sensor material is placed on the upper surface of the upper cover plate 5 and clamped by the clamp 6, the flexible strain sensor material covers the through hole 501. The electric cylinder 2 is fixedly installed on the base frame 1 below the upper cover plate 5, as shown in FIG. Figure 1 , 2 As shown, the electric cylinder 2 is fixed on the base frame 1 in a vertical state, and the output shaft of the electric cylinder 2 is located above the cylinder body of the electric cylinder 2. When the electric cylinder 2 is running, the output shaft of the electric cylinder 2 telescopes upward or downward, and a pressure head 4 is installed at the end of the output shaft of the electric cylinder 2. When the output shaft of the electric cylinder 2 moves upward, the pressure head 4 can pass through the through hole 501 and press on the lower surface of the flexible strain sensor to perform a top pressure experiment on the test material.

[0023] like Figure 1-3 As shown in 5, in order to measure the displacement change of the flexible strain sensor material and record the entire test process, a flexible strain sensor ductility experimental detection device also includes a camera 8 and a laser displacement sensor 9, and an upper bracket 7 is fixedly installed on the side wall of the upper cover plate 5, and the upper bracket 7 suspends and supports the camera 8 and the laser displacement sensor 9 directly above the upper cover plate 5;

[0024] The added camera 8 and laser displacement sensor 9 can greatly improve the accuracy and observability of the experiment. The camera 8 can record the entire test process, which is convenient for subsequent analysis and comparison of the experimental process, while the laser displacement sensor 9 can accurately measure the displacement change of the sensor material, providing accurate data support for the experimental results.

[0025] The upper bracket 7 suspends the camera 8 and the laser displacement sensor 9 just above the upper cover plate 5, ensuring that the camera 8 and the laser displacement sensor 9 can clearly observe and measure the deformation of the sensor material without interfering with the test process.

[0026] like Figure 1-3 As shown in Figures 5 and 6, in order to be able to adjust the position height of the camera 8 and the laser displacement sensor 9, specifically, the upper bracket 7 includes a vertical rod 701 and a horizontal rod 702, the vertical rod 701 is connected to the side wall of the upper cover plate 5, one end of the horizontal rod 702 is slidably sleeved on the side wall of the vertical rod 701, the angle of the horizontal rod 702 is relatively fixed to the angle of the vertical rod 701, so that the horizontal rod 702 only slides up and down on the vertical rod 701, a slider 703 is slidably sleeved on the horizontal rod 702, the angle of the slider 703 is relatively fixed to the angle of the horizontal rod 702, so that the slider 703 only slides on the horizontal rod 702, the camera 8 and the laser displacement sensor 9 are fixed on the lower surface of the slider 703, and a locking bolt 704 is respectively provided on one end of the horizontal rod 702 close to the vertical rod 701 and the side wall of the slider 703;

[0027] The locking bolt 704 disposed at one end of the cross bar 702 close to the vertical bar 701 realizes the function of locking the cross bar 702, that is, the threaded end of the locking bolt 704 is movably pressed against the side wall of the vertical bar 701. When the locking bolt 704 is loosened, the cross bar 702 can slide upward or downward on the vertical bar 701 to adjust the height of the camera 8 and the laser displacement sensor 9. After tightening the locking bolt 704, the cross bar 702 is locked on the vertical bar 701, so that the height of the camera 8 and the laser displacement sensor 9 is fixed, thereby improving the accuracy and observability of the experiment.

[0028] The locking bolt 704 arranged on the slider 703 realizes the function of locking the slider 703, that is, the threaded end of the locking bolt 704 is movably pressed against the side wall of the cross bar 701, and when the locking bolt 704 is loosened, the slider 703 can slide on the cross bar 702, so that the position of the camera 8 and the laser displacement sensor 9 along the length direction of the cross bar 702 can be adjusted. After tightening the locking bolt 704, the slider 703 is locked on the cross bar 702, so that the position of the camera 8 and the laser displacement sensor 9 along the length direction of the cross bar 702 is fixed, thereby improving the accuracy and observability of the experiment.

[0029] like Figure 3 , 6 As shown, in order to facilitate placing the flexible strain sensor material on the upper cover plate 5, specifically, a rotating seat 10 is fixedly installed on the side wall of the upper cover plate 5, and a rotating block 11 is fixedly sleeved on the side wall of the vertical rod 701, and the rotating block 11 is rotatably connected to the inside of the rotating seat 10;

[0030] When the flexible strain sensor material is placed on the upper cover plate 5, the cross bar 702 is moved so that the cross bar 702 is moved away from the upper cover plate 5 (eg Figure 3 As shown), in this state, there is no interference above the upper cover plate 5, which is conducive to placing the flexible strain sensor material on the upper cover plate 5. After the fixture 6 fixes the flexible strain sensor material, the cross bar 702 is reversed to reset. At this time, the camera 8 and the laser displacement sensor 9 are used to measure and record;

[0031] In addition, a handle is provided at one end of the horizontal rod 702 away from the vertical rod 701 to facilitate driving the horizontal rod 702 to rotate around the vertical rod 701.

[0032] like Figure 5 , 6 As shown, in order to fix the measurement position of the camera 8 and the laser displacement sensor 9, specifically, a fixing block 12 is fixedly installed on the side wall of the upper cover plate 5, and a push rod 14 is slidably connected to the interior of the fixing block 12 through a spring 13, as shown in FIG. Figure 6 As shown, the end of the push rod 14 is in the shape of a hemispherical head, and a slot 15 is provided on the side wall of the vertical rod 701. The end of the push rod 14 is movably engaged in the slot 15. When the push rod 14 is engaged in the slot 15, the cross bar 702 rotates to the middle of the upper cover 5. At this time, the push rod 14 is pressed by the spring 13 to cause the end of the push rod 14 to be engaged in the slot 15, so that the cross bar 702 can be fixed in this state, that is, the measurement position of the camera 8 and the laser displacement sensor 9 can be fixed. When the cross bar 702 is pushed to one side with force, the end of the push rod 14 can be disengaged from the slot 15, so that the cross bar 702 can be swung to one side, so that the flexible strain sensor material can be placed on the upper cover 5.

[0033] like Figure 4 As shown, in order to fix the flexible strain sensor material on the upper cover plate 5, specifically, the clamp 6 includes a fixing bolt 601, and the fixing bolt 601 is meshed and connected to the upper surface of the upper cover plate 5, and a pressing plate 602 for pressing the flexible strain sensor material is sleeved on the fixing bolt 601, and the pressing plate 602 can rotate on the fixing bolt 601. After placing the flexible strain sensor material, the pressing plate 602 is rotated to the top of the flexible strain sensor material, and the fixing bolt 601 is tightened. In this way, the pressing plate 602 will press on the flexible strain sensor material, and then the flexible strain sensor material can be fixed on the upper cover plate 5. After the experiment is over, the fixing bolt 601 is loosened. At this time, the pressing plate 602 is turned to one side from the flexible strain sensor material, so that the flexible strain sensor material can be removed from the upper cover plate 5.

[0034] like Figure 1-3As shown, in order to measure the pressure applied to the test material in real time, specifically, a pressure sensor 3 is fixedly installed between the pressure head 4 and the electric rod 2. During the test, the electric cylinder 2 drives the pressure head 4 to move upward, and the pressure sensor 3 is used to measure the pressure applied to the test material in real time;

[0035] Before the test begins, the moving speed and target pressure value of the electric cylinder 2 are set through the operation interface. During the test, the electric cylinder 2 drives the pressure head 4 to move upward until the reading of the pressure sensor 2 reaches the preset value. At the same time, the laser displacement sensor 9 and the camera 8 respectively measure and record the displacement and deformation process of the material, that is, the extension of the material after being subjected to force, and capture the tiny displacement of the material with high-precision measurement capabilities, which greatly improves the accuracy of the test.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible strain sensor ductility test device, comprising a base frame (1), an upper cover plate (5) for containing a flexible strain sensor material is arranged above the base frame (1), a through hole (501) is opened at the center of the upper cover plate (5), and a plurality of clamps (6) for fixing the flexible strain sensor material on the upper surface of the upper cover plate (5) are arranged on the upper surface of the upper cover plate (5) and around the through hole (501), wherein: An electric cylinder (2) is fixedly mounted below the upper cover plate (5) and on the base frame (1); a pressure head (4) is mounted on the end of the output shaft of the electric cylinder (2); when the output shaft of the electric cylinder (2) moves upward, the pressure head (4) can pass through the through hole (501) and press against the lower surface of the flexible strain sensor, so as to perform a top pressure experiment on the test material.

2. A flexible strain sensor ductility test device according to claim 1, characterized in that: It also comprises a camera (8) and a laser displacement sensor (9), and an upper bracket (7) is fixedly mounted on the side wall of the upper cover plate (5), and the upper bracket (7) suspends and supports the camera (8) and the laser displacement sensor (9) directly above the upper cover plate (5).

3. A flexible strain sensor ductility test device according to claim 2, characterized in that: The upper bracket (7) comprises a vertical rod (701) and a horizontal rod (702); the vertical rod (701) is connected to the side wall of the upper cover plate (5); one end of the horizontal rod (702) is slidably sleeved on the side wall of the vertical rod (701); a slider (703) is slidably sleeved on the horizontal rod (702); the camera (8) and the laser displacement sensor (9) are fixed on the lower surface of the slider (703); and a locking bolt (704) is respectively arranged on one end of the horizontal rod (702) close to the vertical rod (701) and on the side wall of the slider (703).

4. A flexible strain sensor ductility test device according to claim 3, characterized in that: A rotating seat (10) is fixedly mounted on the side wall of the upper cover plate (5), a rotating block (11) is fixedly sleeved on the side wall of the vertical rod (701), and the rotating block (11) is rotatably connected to the inside of the rotating seat (10).

5. A flexible strain sensor ductility test device according to claim 4, characterized in that: A fixing block (12) is fixedly mounted on the side wall of the upper cover plate (5), a top rod (14) is slidably connected to the interior of the fixing block (12) via a spring (13), and a clamping groove (15) is provided on the side wall of the vertical rod (701), and the end of the top rod (14) is movably clamped in the interior of the clamping groove (15).

6. A flexible strain sensor ductility test device according to claim 1, characterized in that: The clamp (6) comprises a fixing bolt (601), the fixing bolt (601) is meshedly connected to the upper surface of the upper cover plate (5), and a pressing plate (602) for pressing the flexible strain sensor material is sleeved on the fixing bolt (601).

7. A flexible strain sensor ductility test device according to claim 1, characterized in that: A pressure sensor (3) is fixedly installed between the pressure head (4) and the electric cylinder (2).

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