A dynamic adhesion performance test experiment platform and experiment method

Abstract

The application discloses a kind of dynamic adhesion performance test experimental platform and experimental method, belong to adhesion performance test technical field.Experiment platform is by mobile platform, launching device, adhesion device and acquisition device composition, using adjustable cylinder as launching device to provide certain speed to the adhesion unit of loading counterweight, make it linear motion on low friction slide rail, finally with adhesion target fixed in the end of slide rail occurs adhesion.In the whole experiment process, the speed and acceleration of adhesion unit in the whole process, the contact force in the adhesion process and the change of adhesion area are obtained by laser displacement sensor, force sensor and high-speed camera, and then the dynamic adhesion performance of adhesion unit is obtained and its performance is evaluated.The experimental platform can synchronize triggering of two sensors and high-speed camera, and synchronize the collected signals to obtain more accurate and comprehensive dynamic adhesion performance of adhesion unit.

Description

Technical Field

[0001] This invention relates to the field of adhesion performance testing technology, and more specifically to a dynamic adhesion performance testing experimental platform and method. Background Technology

[0002] With technological advancements and industrial upgrading, adhesive units have found wider applications in fields such as machinery, medicine, and aerospace. Obtaining the adhesive performance of these units is a prerequisite and key to realizing their superior capabilities. However, current experiments on adhesive units primarily focus on static and quasi-static conditions, employing force sensors and high-speed cameras for single-test experiments. These experiments only capture the adhesive unit's performance under static and quasi-static conditions. The adhesive performance of adhesive units under dynamic conditions differs significantly from static or quasi-static performance. Relying solely on adhesive performance tested under static or quasi-static conditions cannot adequately guide the application of adhesive units in real-world environments, posing safety hazards and vulnerabilities. Therefore, to fill this gap in dynamic adhesive testing, fully leverage the superior adhesive performance of adhesive units, and better utilize them in various fields, designing a dynamic adhesive performance testing platform and method to accurately test the performance of adhesive units under dynamic adhesive conditions is a problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0003] In view of this, the present invention provides a dynamic adhesion performance testing platform and method, which can efficiently and accurately test the dynamic adhesion performance of the adhesive unit.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] On the one hand, the present invention provides a dynamic adhesion performance testing experimental platform, which consists of a mobile platform, a launching device, an adhesion device and a data acquisition device;

[0006] The mobile platform includes a slide rail and a slider, with the slider slidably disposed in the slide rail;

[0007] The launching device is fixed to one end of the slide rail, and the launching device is used to provide the adhesive device with different initial velocities and accelerations.

[0008] The adhesion device includes an adhesion unit, an adjustment unit, and an adhesion target; the adjustment unit is disposed on the slider, and the adjustment unit is used to change the mass and angle of the adhesion unit; the adhesion unit is fixed on the adjustment unit; the adhesion target is disposed at the other end of the slide rail;

[0009] The acquisition device is used to acquire adhesion parameters during the dynamic adhesion process of the adhesion unit. The acquisition device includes a velocity acquisition unit and an image acquisition unit, and the adhesion target, the velocity acquisition unit, and the image acquisition unit are arranged sequentially. The velocity acquisition unit is used to calibrate the velocity and acceleration of the adhesion unit before it makes dynamic contact with the adhesion target and to record the contact displacement throughout the test process. The image acquisition unit is used to record the contact image formed on the adhesion target during the dynamic adhesion process of the adhesion unit.

[0010] Preferably, the launching device uses an adjustable cylinder, which provides different initial velocities and accelerations to the adhesion unit and the slider by adjusting the air pressure and compression distance in the cylinder for conducting experiments.

[0011] Preferably, the adjustment unit includes a mass adjustment unit and a direction adjustment unit. The mass adjustment unit can be used to test the dynamic adhesion performance of the adhesive material under different masses.

[0012] Preferably, the direction adjustment unit includes a clamp, two micro servo motors, two worm gears, two turbines, and a rotating plate. The clamp is fixed to the slider, and the two micro servo motors are embedded in the clamp. Each micro servo motor is connected to a set of worm gears and turbines via a coupling. The rotating plate is located between the two turbines, and the rotation of the turbines drives the rotation of the rotating plate. This structure can adjust the angle of the rotating plate by driving the worm gears to rotate, so as to test the adhesion performance of the adhesive unit at different angles.

[0013] Preferably, the velocity acquisition unit includes a laser displacement sensor and a reflective sticker; the laser displacement sensor is fixed to the side near the adhesion target, and the reflective sticker is attached to the mass adjustment unit. The laser displacement sensor and the reflective sticker work together to calibrate the velocity and acceleration of the adhesion unit before dynamic contact and record the contact displacement throughout the process.

[0014] Preferably, the image acquisition unit includes an LED light strip and a high-speed camera. The LED light strip is embedded around the adhesion target, and the high-speed camera is fixed behind the adhesion target and focuses on the adhesion target. The embedded LED light strip provides sufficient light to make the adhesion unit present a bright spot at the adhesion part of the adhesion unit, thereby better capturing the adhesion area and adhesion boundary during the dynamic adhesion process.

[0015] Preferably, the acquisition device further includes a three-dimensional force sensor, which is fixed above the slider and used to test the normal contact force and tangential contact force throughout the experiment.

[0016] On the other hand, this application provides a dynamic adhesion performance testing method, which is applied to the aforementioned dynamic adhesion performance testing platform. The method includes the following steps:

[0017] Step 1: Conduct preliminary experiments on the experimental platform;

[0018] Step 2: Fix the adhesive unit onto the fixture, and set the operating parameters of the launching device and the adjusting unit according to the experimental requirements;

[0019] Step 3: Synchronously trigger the degree acquisition unit, the image acquisition unit, and the three-dimensional force sensor;

[0020] Step 4: Pull the adhesive unit away from the adhesive target, start the launching device, so that the slider drives the adhesive device to be launched and move linearly on the slide rail, so that the adhesive device and the adhesive target make dynamic adhesive contact.

[0021] Step 5: Change the operating parameters of the transmitting device and the adjusting unit, and repeat step 4 to obtain the adhesion state of the adhesive device under different operating parameters, thereby obtaining the dynamic adhesion performance of the adhesive device.

[0022] Preferably, the preliminary experiment includes: calibration of the three-dimensional force sensor, calibration of the friction coefficient of the slide rail, focusing of the high-speed camera, and adjustment of the position of the clamp.

[0023] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a dynamic adhesion performance testing platform and method, which has the following beneficial effects:

[0024] (1) The experimental platform of the present invention can conduct comprehensive dynamic adhesion experiments on the adhesive unit with different speeds and accelerations, different masses and different angles without changing the equipment. The performance of the adhesive unit under dynamic adhesion conditions can be obtained more effectively and accurately through the three testing devices in the experimental platform.

[0025] (2) The adjustable cylinder is the only power source in the experimental process, avoiding interference from external factors. Furthermore, by adjusting the internal air pressure and the extension stroke of the cylinder, the adhesion device can have different speeds and accelerations, and the dynamic adhesion performance under different conditions can be tested experimentally.

[0026] (3) The use of a slide rail and a slider to act as the moving path and moving platform of the adhesive unit ensures the linear motion of the adhesive unit and reduces the influence of friction on the experimental process.

[0027] (4) By adding counterweights of different masses to the slider, the mass of the adhesive unit is given to simulate the dynamic adhesion process of objects of different masses, so as to obtain more accurate dynamic adhesion characteristics of the adhesive unit.

[0028] (5) Given that the dynamic adhesion process is extremely short, a three-dimensional force sensor can be used to accurately output the normal contact force and tangential contact force of the adhesive unit throughout the entire dynamic adhesion process.

[0029] (6) The fixture, which serves as the connection between the force sensor and the adhesive unit, is manufactured in one piece using 3D printing technology, ensuring the strength required for the experiment. The fixture is embedded with a micro servo motor and a worm gear mechanism. The servo motor drives the worm gear to rotate, thereby causing the worm gear to rotate and tilt the rotating plate at a certain angle, achieving the purpose of stepless adjustment of the rotation angle. This allows the adhesive unit fixed on the rotating plate to dynamically adhere to the adhesive target at different angles, saving experimental time and costs.

[0030] (7) The reflective sticker fixed above the counterweight is used in conjunction with the laser displacement sensor to measure the speed and acceleration changes of the adhesive device throughout the experiment. Before the experiment begins, the laser displacement sensor is used to calibrate the friction between the slide rail and the slider to reduce the influence of friction on the experiment. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a slide rail experimental platform for testing dynamic adhesion performance.

[0033] Figure 2 This is a front view of the dynamic adhesion performance testing platform.

[0034] Figure 3 Top view of the dynamic adhesion performance testing platform;

[0035] Figure 4 A detailed schematic diagram of the fixture and adhesive unit;

[0036] Figure 5 A detailed schematic diagram of the acrylic sheet and LED light strip;

[0037] Figure 6 This is a schematic diagram of the synchronous triggering of the testing device.

[0038] Among them: 4-Adjustable cylinder; 5-Slide rail; 6-Slider; 7-Counterweight; 8-Three-dimensional force sensor; 9-Clamp; 10-Miniature servo motor; 11-Worm gear; 12-Turbine; 13-Rotating plate; 14-Adhesive unit; 15-Reflective sticker; 16-Laser displacement sensor; 17-Transparent acrylic sheet; 18-LED light strip; 19-High-speed camera. Detailed Implementation

[0039] The technical solutions of 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.

[0040] On one hand, embodiments of the present invention disclose a dynamic adhesion performance testing experimental platform, such as... Figure 1-3 As shown, the experimental setup consists of a mobile platform, a launching device, an adhesion device, and a data acquisition device. To ensure the stability and repeatability of the experiment, the entire experimental platform is fixed to an aluminum alloy frame.

[0041] The mobile platform includes a slide rail 5 and a slider 6, with the slider 6 slidably disposed within the slide rail 5.

[0042] The launching device can employ an adjustable cylinder, with the adjustable cylinder 4 fixed to one end of the slide rail 5, such as... Figure 4 As shown, the adjustable cylinder 4 is located at the far left of the aluminum alloy frame. The experiment is conducted by adjusting the air pressure and compression distance in the adjustable cylinder 4 to provide different initial velocities and accelerations for the adhesion device.

[0043] The adhesion device includes an adhesion unit 14, an adjustment unit, and an adhesion target. The adjustment unit includes a mass adjustment unit and a direction adjustment unit. The mass adjustment unit can test the dynamic adhesion performance of the adhesive material at different masses by using counterweights 7 of different masses fixed on the slider 6. Figure 4As shown, the orientation adjustment unit includes a clamp 9, two micro servo motors 10, two worm gears 11, two turbines 12, and a rotating plate 13. The clamp 9 is integrally molded from 3D printing material, and its six surrounding holes allow it to be fixed to the three-dimensional force sensor 8 for easy force signal acquisition and transmission. The two micro servo motors 10 are embedded in the clamp 9, and each micro servo motor 10 is connected to a set of worm gears 11 and turbines 12 via a coupling. The rotating plate 13 is located between the two turbines 12. The rotation of the turbines 12 drives the rotation of the rotating plate 13. This structure can adjust the angle of the rotating plate 13 by driving the micro servo motors 10 to rotate the turbines 12 and worm gears 11, so as to test the adhesion performance of the adhesion unit 14 at different angles. The adhesive unit 14 is fixed at the front of the entire adhesive device; the adhesive target is set at the other end of the slide rail 5. In this embodiment, a transparent acrylic plate 17 can be selected as the adhesive target. The acrylic plate 17 can react well with the adhesive material, making the adhesive material adhere better, and thus the dynamic performance of the adhesive unit can be evaluated. The size of the transparent acrylic plate 17 can be selected as 10cm×10cm×1cm.

[0044] The fixture 9, which serves as the connection between the three-dimensional force sensor 8 and the adhesive unit 14, is manufactured as a single unit using 3D printing technology, ensuring the strength required for the experiment. The fixture incorporates a micro servo motor and a worm gear mechanism. The servo motor 10 drives the worm gear 11 to rotate, thereby causing the worm gear 12 to rotate and tilt the rotating plate 13 at a certain angle, achieving stepless adjustment of the rotation angle. This allows the adhesive unit 14, fixed on the rotating plate, to dynamically adhere to the planar acrylic plate 17 at different angles, saving experimental time and costs.

[0045] The acquisition device includes a velocity acquisition unit and an image acquisition unit, which are mounted on a slide rail 5 near the adhesion target. The velocity acquisition unit is used to calibrate the velocity and acceleration of the adhesion unit 14 before dynamic contact and record the contact displacement throughout the test process. Preferably, the velocity acquisition device includes a laser displacement sensor 16 and a reflective sticker 15; the laser displacement sensor 16 is fixed to the side near the adhesion target, and the reflective sticker 15 is attached to the mass adjustment unit, i.e., the mass block. The laser displacement sensor 16 and the reflective sticker 15 work together to calibrate the velocity and acceleration of the adhesion unit 14 before dynamic contact and record the contact displacement throughout the process. Considering the relatively high speed of the adhesion device and the rapid displacement change during the contact process, a Panasonic HG-C1050 displacement sensor with a measurement center distance of 50mm, a measurement range of ±15mm, a repeatability of 30μm, and a sampling frequency of 2000Hz is selected. The image acquisition unit is used to record the contact image formed on the adhesion target during the dynamic adhesion process of the adhesion unit 14. Figure 5As shown, the image acquisition unit includes an LED light strip 18 and a high-speed camera 19. The LED light strip 18 (type 0805, 12.5V) is embedded around the transparent acrylic plate 17, and the high-speed camera 19 is fixed behind the transparent acrylic plate 17 and focuses on it. The embedded LED light strip 18 provides sufficient light to make the adhesion unit 14 appear as a bright spot on the adhesion part of the adhesion target, thus better capturing the adhesion area and adhesion boundary during the dynamic adhesion process. The high-speed camera 19 is fixed at the far right end of the entire experimental platform, facing and focusing on the transparent acrylic plate 17, to record the contact image formed on the acrylic plate 17 during the dynamic adhesion process of the adhesion unit 14. Given the short duration of the entire dynamic adhesion process, the sampling frequency of the high-speed camera is 500 fqs.

[0046] Preferably, the acquisition device also includes a three-dimensional force sensor 8, which is located in front of the counterweight 7 and fixed on the slider 6. It is used to test the normal contact force and tangential contact force during the entire experimental process. Considering that the time used in the entire dynamic adhesion process is extremely short, the sampling frequency of the force sensor is selected to be 1000Hz.

[0047] On the other hand, this embodiment provides a dynamic adhesion performance testing method. The method is applied to the aforementioned dynamic adhesion performance testing platform and includes the following steps:

[0048] Step 1: Conduct preliminary experiments on the experimental platform;

[0049] Step 2: Fix the adhesive unit 14 onto the fixture 9, and set the operating parameters of the launching device and the adjustment unit according to the experimental requirements;

[0050] Step 3: Synchronously trigger the velocity acquisition unit, image acquisition unit, and 3D force sensor 8;

[0051] Step 4: Pull the adhesive unit 14 a certain distance away from the adhesive target, start the launching device, so that the slider 6 drives the adhesive device to be ejected at a certain speed and acceleration, and moves in a straight line on the slide rail 5, so that the adhesive device makes dynamic adhesive contact with the adhesive target at a certain speed.

[0052] Step 5: Change the operating parameters of the launching device and the adjustment unit, and repeat step 4 to obtain the adhesion state of the adhesive device under different speeds and accelerations, different masses and different angles, and obtain the dynamic adhesion performance of the adhesive device.

[0053] Preferably, the preliminary experiments include: calibration of the three-dimensional force sensor, calibration of the friction coefficient of the slide rail, focusing of the high-speed camera, and adjustment of the fixture position.

[0054] like Figure 6As shown, in another embodiment of the present invention, the three-dimensional force sensor 8, the laser displacement sensor 16 and the high-speed camera 19 can be synchronously triggered by a synchronous trigger, and the collected force signal, displacement signal and image acquisition signal are synchronized on the PC to accurately obtain the dynamic adhesion characteristics of the adhesion unit 14.

[0055] Before the experiment began, a preliminary experiment was conducted, including the calibration of the three-dimensional force sensor 8 to ensure accurate acquisition of force signals during the dynamic adhesion process. The friction coefficient of the slide rail 5 was calibrated using the laser displacement sensor 16 to reduce the impact of friction on the experiment. The high-speed camera 19 was focused to ensure that the adhesion image of the adhesion unit 14 on the transparent acrylic plate 17 was clearly visible to the camera. The positions of the fixture 9 and the adhesion unit 14 were adjusted to ensure that the dynamic adhesion position was located in the center of the acrylic plate 17 during the experiment, which facilitated the acquisition of adhesion images by the high-speed camera 19 and subsequent processing.

[0056] In the experimental test, the adhesion unit 14 was first fixed on the fixture 9, and the adjustable cylinder 4 was opened to provide a certain air pressure (which can be adjusted according to the required speed and acceleration). The three-dimensional force sensor 8, the laser displacement sensor 16, and the high-speed camera 19 were then activated and synchronously triggered. Next, the adhesion device was pulled to the left a certain distance, compressing the cylinder 4. The air pressure propelled the adhesion device out at a certain speed and acceleration, causing it to move linearly on the slide rail 5. Finally, the adhesion unit 14 made dynamic adhesive contact with the transparent acrylic sheet at a certain speed.

[0057] (1) If the adhesive unit 14 can successfully adhere to the transparent acrylic plate 17 during the experiment, the experimental platform will be pulled apart to detach it, and the single experiment will end.

[0058] (2) The adhesive unit 14 failed to successfully adhere to the transparent acrylic plate 17 during the experiment, that is, the experimental platform automatically popped open and the experiment ended.

[0059] Repeat the above experimental steps to complete the experiments on the adhesive unit 14 with different speeds and accelerations, different masses and different angles, and obtain the dynamic adhesion performance of the adhesive unit.

[0060] The experimental results mainly consist of three parts: force data, displacement data, and contact area data. The force data is divided into contact force data and separation force data, while the displacement data is divided into contact displacement data and separation displacement data. During the experiment, different velocities, accelerations, masses, and angles affected the contact force, contact displacement, and contact area, which in turn affected the separation force and separation displacement. The dynamic adhesion performance of the adhesive unit 14 was primarily evaluated based on the separation force and separation displacement, and the influence of each variable on the dynamic adhesion process of the adhesive unit 14 was analyzed using the above data.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dynamic adhesion performance testing platform, characterized in that, It consists of a mobile platform, a launching device, an adhesion device, and a data acquisition device; The mobile platform includes a slide rail and a slider, with the slider slidably disposed in the slide rail; The launching device is fixed to one end of the slide rail, and the launching device is used to provide the adhesive device with different initial velocities and accelerations. The adhesion device includes an adhesion unit, an adjustment unit, and an adhesion target; the adjustment unit is disposed on the slider, and the adjustment unit is used to change the mass and angle of the adhesion unit; the adhesion unit is fixed on the adjustment unit; the adhesion target is disposed at the other end of the slide rail; The acquisition device is used to acquire adhesion parameters during the dynamic adhesion process of the adhesion unit. The acquisition device includes a velocity acquisition unit and an image acquisition unit, and the adhesion target, the velocity acquisition unit, and the image acquisition unit are arranged sequentially. The velocity acquisition unit is used to calibrate the velocity and acceleration of the adhesion unit before it dynamically contacts the adhesion target and to record the contact displacement during the entire test process. The image acquisition unit is used to record the contact image formed on the adhesion target during the dynamic adhesion process of the adhesion unit.

2. The dynamic adhesion performance testing platform according to claim 1, characterized in that, The launching device uses an adjustable cylinder.

3. The dynamic adhesion performance testing platform according to claim 2, characterized in that, The adjustment unit includes a mass adjustment unit and a direction adjustment unit.

4. The dynamic adhesion performance testing platform according to claim 3, characterized in that, The direction adjustment unit includes a clamp, two micro servo motors, two worm gears, two turbines, and a rotating plate. The clamp is fixed to the slider, the two micro servo motors are embedded in the clamp, and each micro servo motor is connected to a set of worm gears and turbines via a coupling. The rotating plate is located between the two turbines.

5. The dynamic adhesion performance testing platform according to claim 4, characterized in that, The velocity acquisition unit includes a laser displacement sensor and a reflective sticker; the laser displacement sensor is fixed on the side close to the adhesive target, and the reflective sticker is attached to the mass adjustment unit.

6. The dynamic adhesion performance testing platform according to claim 5, characterized in that, The image acquisition unit includes an LED light strip and a high-speed camera. The LED light strip is embedded around the adhesive target, and the high-speed camera is fixed behind the adhesive target and focuses on the adhesive target.

7. The dynamic adhesion performance testing platform according to claim 6, characterized in that, The acquisition device also includes a three-dimensional force sensor, which is fixed above the slider.

8. A method for testing dynamic adhesion performance, characterized in that, The experimental method is applied to the dynamic adhesion performance testing platform as described in claim 7, and the experimental method includes the following steps: Step 1: Conduct preliminary experiments on the experimental platform; Step 2: Fix the adhesive unit onto the fixture, and set the operating parameters of the launching device and the adjusting unit according to the experimental requirements; Step 3: Synchronously trigger the velocity acquisition unit, the image acquisition unit, and the three-dimensional force sensor; Step 4: Pull the adhesive unit away from the adhesive target, start the launching device, so that the slider drives the adhesive device to be launched and move linearly on the slide rail, so that the adhesive device and the adhesive target make dynamic adhesive contact. Step 5: Change the operating parameters of the transmitting device and the adjusting unit, and repeat step 4 to obtain the adhesion state of the adhesive device under different operating parameters, thereby obtaining the dynamic adhesion performance of the adhesive device.

9. The experimental method for testing dynamic adhesion performance according to claim 8, characterized in that, The preliminary experiments include: calibration of the three-dimensional force sensor, calibration of the friction coefficient of the slide rail, focusing of the high-speed camera, and adjustment of the position of the fixture.

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