Device and method for detecting bending performance of flexible device

Abstract

The invention relates to a device and a method for detecting the bending performance of a flexible device. The testing roller comprises a first rotating body and a thin film, at least part of the thin film is fixed and / or wound on the outer wall of the first rotating body, and the first rotating body is rotationally arranged on the support so as to wind and unwind the thin film; and the rotating axis of the first rotating body is located between the two pressure applying pieces, and the pressure applying pieces are movably arranged on the support, so that the part, at the testing roller, of the flexible device is tensioned, bent and attached to the thin film.

Description

Technical Field

[0001] The present invention relates to the field of flexible device testing, and in particular to a flexible device bending performance testing device and a testing method. Background Art

[0002] Flexible devices refer to electronic devices that can be forced to bend in a stress field, such as flexible sensors, flexible integrated circuits, flexible semiconductor chips, etc. Since bending deformation will change the electrical performance of electronic devices, the impact of bending deformation on the function of the device needs to be considered during the design process of such devices. In the early design, process determination and subsequent testing process, the device needs to be bent and tested for parameter collection.

[0003] During the bending test of a specific device, the device needs to be subjected to pure bending loads at different bending radii. By comparing the performance of various electrical parameters of the device at different bending radii, its bending radius limit value (referring to the minimum bending radius corresponding to the normal working state of the device) is determined. The existing test equipment mainly changes the bending radius by replacing prefabricated modules with fixed bending radius. The testable bending radius experimental value options of the entire test machine depend on the number of prefabricated bending radius modules. In other words, the bending radius limit value of the device to be tested can only be obtained from the bending radius of a certain prefabricated module, and it cannot be further refined, and it is also impossible to obtain the experimental performance of the relevant flexible device under continuous changes in bending radius.

[0004] In order to improve the test accuracy, the only way is to increase the number of prefabricated modules. However, this method will greatly increase the cost of the entire test platform, and frequent replacement of modules will greatly increase the complexity and manpower burden of the experiment. Summary of the invention

[0005] Based on this, it is necessary to provide a flexible device bending performance detection device and a detection method to address the problem of insufficient accuracy in detecting the bending performance of flexible devices.

[0006] A flexible device bending performance detection device, comprising:

[0007] Bracket;

[0008] A test roller, the test roller comprising a first rotating body and a film at least partially fixed to and / or wound around an outer wall of the first rotating body, the first rotating body being rotatably disposed on the bracket to retract and release the film; and

[0009] Two pressure members, the rotation axis of the first rotating body is located between the two pressure members, and the pressure members are movably arranged on the bracket to make the part of the flexible device at the test roller bend and fit on the film.

[0010] The flexible device bending performance detection device of the present invention further comprises a second rotator rotatably arranged on the bracket, and a part of the film is fixed and / or wound on the second rotator.

[0011] The flexible device bending performance detection device of the present invention also includes a first torque sensor, a second torque sensor, a control board, and a third servo motor. The third servo motor is transmitted to the pressure member. The first torque sensor is arranged on the first rotating body, and the second torque sensor is arranged on the second rotating body. The third servo motor, the first torque sensor and the second torque sensor are all electrically connected to the control board.

[0012] The pressure-applying member of the present invention is movably arranged in the first direction, and the projection of the pressure-applying member in the first direction is located outside the film.

[0013] The first rotating body of the present invention is in the shape of a rod.

[0014] The flexible device bending performance detection device of the present invention further comprises two clamping units for clamping the flexible device, and the two pressure applying members are located between the two clamping units.

[0015] The flexible device bending performance detection device described in the present invention also includes a connecting piece, the two pressure pieces are both rod-shaped and fixed in parallel on the connecting piece, the connecting piece is movably arranged on the bracket along a first direction, the rotation axis of the first rotating body is parallel to the pressure piece, and the two pressure pieces are symmetrical about the rotation axis of the first rotating body.

[0016] The flexible device bending performance detection device described in the present invention also includes a second rotating body rotatably arranged on the bracket, a portion of the film is wrapped around the second rotating body, the first rotating body and the second rotating body are both rod-shaped and parallel to each other, the first rotating body and the second rotating body are arranged opposite to each other in a first direction, and the film has the same winding direction on the first rotating body and the second rotating body.

[0017] The flexible device bending performance detection device of the present invention also includes a control board, a first servo motor and a second servo motor. The first servo motor is transmitted to the first rotor, and the second servo motor is transmitted to the second rotor. The first servo motor and the second servo motor are both electrically connected to the control board to allow the first rotor and the second rotor to rotate simultaneously in opposite directions and to match the rotational speeds of the first rotor and the second rotor.

[0018] The clamping unit of the present invention comprises a clamping seat and a clamping cover plate, wherein the clamping seat has a clamping surface, and the clamping cover plate is detachably installed on the clamping surface.

[0019] A method for detecting bending performance of a flexible device, based on a device for detecting bending performance of a flexible device, the method comprising:

[0020] Rotating the first rotating body to retract and release the film on the first rotating body, thereby changing the outer diameter of the test roller;

[0021] placing a flexible device on the outer wall surface of the test roller;

[0022] The two pressure members squeeze the side of the flexible device facing away from the test roller, so that the part of the flexible device at the test roller is attached to the outer wall surface of the test roller and converted into a tensioned state.

[0023] The present invention rotates the second rotating body and the first rotating body, one of the first rotating body and the second rotating body releases the film, and the other one winds up the film.

[0024] In the present invention, the first rotor and the second rotor rotate simultaneously, and the first servo motor and the second servo motor respectively control the rotation speeds of the first rotor and the second rotor so that the speed at which the film is released by one of the first rotor and the second rotor is equal to the speed at which the film is wound by the other. While the first rotor and the second rotor rotate, the pressure member is controlled to move so that the portion of the flexible device at the test roller is always in a tensioned state.

[0025] The beneficial effects of the present invention are:

[0026] During the rotation of the first rotor, the portion of the film not wound on the first rotor can be further wound onto the first rotor, or the portion of the film wound on the first rotor can be released, thereby releasing the winding state and realizing the retraction and release of the film.

[0027] The portion of the film wound on the first rotating body is the first winding portion, and the pressure member presses the flexible device so that the bending diameter of the flexible device matches the outer diameter of the first winding portion, thereby facilitating electrical testing of the flexible device under specific bending diameter conditions.

[0028] During the process of retracting and releasing the film, the first rotor changes the outer diameter of the first winding portion, thereby making it possible to test the flexible device under different bending diameter conditions. The above adjustment process does not require the disassembly and assembly of the test roller, and the adjustment process is very simple. At the same time, the minimum change in the bending diameter of the flexible device is only twice the thickness of a single layer of the film, which can achieve a very high adjustment accuracy. The two pressure members are respectively on both sides of the rotation axis of the first rotor, which not only enables the bent portion of the flexible device at the first winding portion to fully fit with the outer wall of the first winding portion, so that the bending diameter of the flexible device fully matches the outer diameter of the first winding portion, but also the bending stress of the bent portion of the flexible device at the first winding portion is more uniform in space. In this way, a more accurate bending diameter limit value of the flexible device is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The three-dimensional structure of the bending performance detection device of the flexible device in Example 1 of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 2 The three-dimensional structure of the bending performance detection device of the flexible device in Example 1 of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the assembly structure of some parts and components of the flexible device bending performance detection device in Example 1 of the present invention;

[0032] Figure 4 Schematic diagram of the working principle structure of the flexible device bending performance detection device in Example 1 of the present invention (after the pressure member moves);

[0033] Figure 5 Schematic diagram of the working principle structure of the flexible device bending performance detection device in Example 1 of the present invention (before the pressure member moves).

[0034] Reference numerals:

[0035] 1. Bracket; 2. Test roller; 21. First rotator; 22. Film; 221. First winding portion; 3. Pressure member; 4. Clamping unit; 41. Clamping seat; 42. Clamping cover; 43. Locking member; 5. Second rotator; 6. Flexible device; 7. First servo motor; 8. Second servo motor; 91. Connector; 92. Third servo motor. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Embodiment 1:

[0043] See also Figure 1-Figure 5 This embodiment provides a flexible device bending performance detection device, including a bracket 1, a test roller 2 and two pressure members 3.

[0044] The test roller 2 includes a first rotating body 21 and a film 22 which is at least partially fixed and / or wound on the outer wall of the first rotating body 21. The first rotating body 21 is rotatably arranged on the bracket 1, wherein the rotation axis of the first rotating body 21 extends along the second direction. In order to facilitate the winding of the film 22, the first rotating body 21 can be a solid rod or a hollow cylinder. Accordingly, the rotation axis of the first rotating body 21 is its own central axis, and the first rotating body 21 realizes self-rotation on the bracket 1. It is easy to understand that during the rotation of the first rotating body 21, depending on its rotation direction, the part of the film 22 not wound on the first rotating body 21 can be further wound onto the first rotating body 21, or the part of the film 22 wound on the first rotating body 21 can be released to release the winding state, so the rotation action of the first rotating body 21 can realize the retraction and release of the film 22. The portion of the film 22 wound on the first rotating body 21 is the first winding portion 221, which is in the shape of a circular tube. The outer wall surface of the first winding portion 221 is the outer wall surface of the test roller 2, so the outer diameter of the first winding portion 221 is the outer diameter of the test roller 2. When the first rotating body 21 is in the process of retracting and releasing the film 22, the outer diameter of the first winding portion 221 and the test roller 2 is also changed.

[0045] The two pressure members 3 are spaced apart in the third direction, and the rotation axis of the first swivel 21 is located between the two pressure members 3, wherein the third direction is perpendicular to the second direction, and when the bracket 1 is placed horizontally, the third direction and the second direction generally constitute a horizontal plane.

[0046] The pressure member 3 is movably arranged on the bracket 1. The function of the pressure member 3 is to press the flexible device 6 to be tested against the outer wall of the first winding portion 221. The pressing direction is not restricted, so the movable direction of the pressure member 3 is generally not restricted. In this embodiment, only the case where the pressure member 3 is movably arranged in the first direction is used as an example, wherein the first direction is perpendicular to the third direction and the second direction at the same time. Therefore, the pressure member 3 of this embodiment can press the flexible device 6 up and down in the first direction.

[0047] Based on the above-mentioned flexible device bending performance detection device, this embodiment also provides a flexible device bending performance detection method, including the following steps:

[0048] Step S1: Control the first rotating body 21 to rotate so that the first rotating body 21 can retract and release the film 22, thereby adjusting the outer diameter of the first winding portion 221, and then changing the outer diameter of the test roller 2, so that the outer diameter of the test roller 2 is consistent with the target bending diameter required by the test requirements of the flexible device 6;

[0049] Step S2: Place the flexible device 6 on the outer wall of the test roller 2, see Figure 5 At this time, the flexible device 6 is in a relatively relaxed state, and has only a small amount of contact with the outer wall surface of the first winding portion 221 , and is not fully fitted. At the same time, the pressure member 3 is located on the side of the flexible device 6 away from the first winding portion 221 .

[0050] Step S3: Move the pressure member 3 upward and downward in the first direction so that the two pressure members 3 press the side of the flexible member 6 away from the test roller 2, see Figure 4 During this process, the portion of the flexible device 6 at the test roller 2 gradually bends and deforms toward the outer wall surface of the first winding portion 221, and is gradually tensioned. The portion of the flexible device 6 between the two pressure members 3 is not only fully tensioned, but also fully fits with the top outer wall surface of the first winding portion 221. As a result, the bending diameter of the first winding portion 221 is equal to the outer diameter of the first rotor 21, thereby performing a performance test on the flexible device 6 under the target bending diameter condition.

[0051] It is easy to understand that, for each rotation of the first rotating body 21, the outer diameter of the first winding portion 221 changes by twice the thickness of the single layer of the film 22. As long as the thickness of the single layer of the film 22 is small enough, the bending diameter of the flexible device 6 can be changed in a nearly continuous manner within a wide range by rotating the first rotating body 21 by different numbers of turns. With the cooperation of the pressure member 3, the electrical performance test of the flexible device 6 under different bending diameter conditions can be obtained.

[0052] During the above test process, the change of the bending diameter of the flexible device 6 can be achieved by rotating the first rotating body 21, without disassembling the test roller 2, so the adjustment process is very simple. At the same time, the minimum change in the bending diameter of the flexible device 6 is only twice the thickness of the single layer of the film 22, which can achieve a very high adjustment accuracy. In addition, since the two pressure members 3 are respectively on both sides of the rotation axis of the first rotating body 21, not only can the bent portion of the flexible device 6 at the first winding portion 221 be fully fitted with the outer wall of the first winding portion 221, so that the bending diameter of the flexible device 6 fully matches the outer diameter of the first winding portion 221, but also the bending stress of the bent portion of the flexible device 6 at the first winding portion 221 is more uniform in space. Therefore, based on the flexible device bending performance detection device of this embodiment, a more accurate bending diameter limit value of the flexible device 6 (the minimum bending diameter of the flexible device 6 under normal working conditions) can be obtained.

[0053] In addition, since the two pressure members 3 are respectively on both sides of the rotation axis of the first rotating body 21, the rotation torque applied by the two pressure members 3 on the first rotating body 21 through the flexible device 6 can at least partially offset. Taking the case where the first rotating body 21 does not need to rotate during a single electrical test of the flexible device 6 as an example, the offset of the rotation torque can avoid additional changes in the outer diameter of the first winding portion 221 and the bending degree of the flexible device 6 during a single electrical test of the flexible device 6, thereby ensuring the accuracy and stability of the test results.

[0054] The flexible device bending performance detection device of this embodiment can make the flexible device 6 reach the minimum bending diameter, that is, the diameter of the first rotor 21. At this time, the film 22 is completely or almost completely not wrapped around the first rotor 21 (the first winding portion 221 disappears at this time), and one end of the film 22 can be fixed on the first rotor 21 to prevent the film 22 from falling off the first rotor 21. Based on this, the first rotor 21 is deliberately selected as a solid rod in this embodiment. The first rotor 21 is made of the same material. Compared with the hollow cylindrical structure, the first rotor 21 can obtain a smaller diameter by selecting a solid rod. In this way, without considering the bending capacity limit of the flexible device 6 itself, the flexible device 6 can achieve a smaller bending diameter.

[0055] In some other embodiments, the pressure member 3 can clamp the flexible device 6 , so that the portion of the flexible device 6 at the first winding portion 221 is directly tensioned and bent under the cooperation of the two pressure members 3 .

[0056] In this embodiment, the pressure member 3 does not clamp the flexible device 6, so the flexible device bending performance detection device also includes two clamping units 4 for clamping the flexible device 6, and the two pressure members 3 are located between the two clamping units 4. Under the clamping action of the clamping unit 4, the length of the flexible device 6 between the two clamping units 4 is a certain value. When the length of the flexible device 6 is small, the clamping unit 4 generally clamps the end of the flexible device 6, so that during the downward movement of the pressure member 3, the part of the flexible device 6 between the two pressure members 3 can be forced to press on the outer wall surface of the first winding portion 221.

[0057] See also Figure 4 When the portion of the flexible device 6 between the two pressure members 3 is in a tensioned state, the portion of the flexible device 6 between the adjacent pressure members 3 and the clamping unit 4 is also in a tensioned state. At this time, the portion of the flexible device 6 between the two clamping units 4 is substantially W-shaped. Figure 5 Before the pressure member 3 presses down the flexible device 6, the portion of the flexible device 6 between the two clamping units 4 is substantially Ω. Figure 5 The status is switched to Figure 4 The pressure member 3 needs to move downward a sufficient distance to be in the state of being ...

[0058] In order to solve the above problems, the clamping unit 4 of this embodiment includes a clamping seat 41, a clamping cover plate 42 and a locking member 43. The top of the clamping seat 41 is a clamping surface, and the clamping cover plate 42 is detachably installed on the clamping surface through the locking member 43. The detachable assembly relationship between the clamping cover plate 42 and the clamping surface enables the clamping cover plate 42 and the clamping surface to generate a certain gap for the end of the flexible device 6 to pass through in the non-locked state, and then the flexible device 6 is pressed on the clamping surface by the clamping cover plate 42, and the non-end position of the flexible device 6 is clamped by the locking member 43. When the complete length of the flexible device 6 itself is long, the length of the flexible device 6 between the two clamping units 4 can be adjusted by changing the clamping position of the two clamping units 4 on the flexible device 6, so as to ensure that when the pressure member 3 moves to the lowest point in the first direction, the part of the flexible device 6 between the two clamping units 4 can be in a tensioned state.

[0059] Furthermore, in order to enable the pressure member 3 to move to a lower position in the first direction, the clamping unit 4 and the test roller 2 need to avoid the pressure member 3, so the projection of the pressure member 3 in the first direction is located outside the film 22 and the clamping unit 4.

[0060] In order to improve the force uniformity of the flexible device 6 during bending deformation, the two pressure members 3 are both rod-shaped, the two pressure members 3 are parallel to each other, and both extend along the second direction to be parallel to the first rotator 21. Furthermore, the flexible device bending performance detection device also includes a connecting member 91, and the two pressure members 3 are both fixed on the connecting member 91, and the connecting member 91 is movably arranged on the bracket 1 along the first direction, and the connecting member 91 can drive the two pressure members 3 to move synchronously in the first direction. In addition, the two pressure members 3 are symmetrical about the rotation axis of the first rotator 21, so as to ensure the force symmetry of the flexible device 6 at the first winding part 221, and the rotational torque generated by the two pressure members 3 on the first winding part 221 can be completely offset, so as to avoid the rotation of the first rotator 21 caused by the pressure of the pressure members 3, so as to maintain the stability of the bending diameter of the flexible device 6 during the detection process.

[0061] Retracting and releasing the film 22 solely by rotating the first rotator 21 may cause wrinkles in the portion of the film 22 at the outer wall of the first winding portion 221, which may cause the portion of the flexible device 6 at the outer wall of the first winding portion 221 to not bend strictly according to the arc-shaped curved surface, reducing the precision and accuracy of the electrical detection results. Based on this, the flexible device bending performance detection device of this embodiment also includes a second rotatable body 5 rotatably arranged on the bracket 1, and the first rotatable body 21 and the second rotatable body 5 are arranged relative to each other in the first direction. The second rotatable body 5 is also for retracting and releasing the film 22 by rotation, so it is consistent with the first rotatable body 21, and the second rotatable body 5 is also rod-shaped. The central axis of the second rotatable body 5, that is, its rotation axis, also extends along the second direction to be parallel to the first rotatable body 21. The two ends of the film 22 are respectively fixed to the first rotatable body 21 and the second rotatable body 5. The second rotating body 5 can pull the film 22 by rotating, so that the first winding portion 221 is always retracted and released in a tensioned state, avoiding wrinkles on the outer wall surface of the first winding portion 221, thereby ensuring the precision and accuracy of the detection result of the flexible device 6.

[0062] The first rotating body 21 and the second rotating body 5 are both supported by the bracket 1 to prevent them from moving on the bracket 1 .

[0063] In order to achieve tensioning of the film 22, the take-up length of one of the first rotating body 21 and the second rotating body 5 should be equal to the pay-out length of the other. In general detection scenarios, the rotation of the first rotating body 21 and the second rotating body 5 can be performed simultaneously or sequentially, as long as the film 22 is in a tensioned state when the flexible device 6 is bent. Therefore, in some embodiments, the rotation of the first rotating body 21 and the second rotating body 5 can be manually controlled.

[0064] In some special detection scenarios, while the first rotating body 21 is rotating, it also needs to cooperate with the synchronous movement of the pressing member 3, so that the bending diameter of the flexible device 6 continuously changes. In this detection scenario, the first rotating body 21 and the second rotating body 5 need to rotate simultaneously to ensure that the thin film 22 is always in a tensioned state.

[0065] A part of the thin film 22 is wound around the second rotating body 5 to form a circular tubular second winding portion. The outer diameter of the first winding portion 221 is D 1 , and the outer diameter of the second winding portion is D 2 , the rotational angular velocity of the first rotating body 21 is w 1 , and the rotational angular velocity of the second rotating body 5 is w 2 , in order to keep the thin film 22 in a tensioned state, it is necessary to satisfy D 1 w 1 = D 2 w 2 , the total amount of the thin film 22 is constant, so D 1 and D 2 are negatively correlated. At the same time, as the rotation progresses, D 1 and D 2 will both change, so the action relationship between w 1 and w 2 is always changing. In this case, it is impossible to manually control the rotation of the first rotating body 21 and the second rotating body 5 to meet the requirements of the above special detection scenario.

[0066] Therefore, the flexible device bending performance detection device of this embodiment further includes a control board, a first servo motor 7 and a second servo motor 8. The first servo motor 7 is transmitted to the first rotating body 21, and the second servo motor 8 is transmitted to the second rotating body 5. The first servo motor 7 and the second servo motor 8 are both electrically connected to the control board. The first servo motor 7 and the second servo motor 8 can transmit the rotation angle data of the first rotating body 21 and the second rotating body 5 to the control board, so as to obtain the lengths of the thin film 22 wound around the first rotating body 21 and the second rotating body 5 respectively, and then calculate D 1 and D 2 . Thus, the first servo motor 7 and the second servo motor 8 respectively control and match the rotational speeds of the first rotating body 21 and the second rotating body 5 to meet the requirement that the thin film 22 is always in a tensioned state.

[0067] In the above detection process, in addition to the first rotating body 21 and the second rotating body 5 rotating simultaneously at a matching rotational speed, it is also necessary to ensure that the flexible device 6 is always in a tensioned state on the test roller 2. For this purpose, the flexible device bending performance detection device of this embodiment further includes a first torque sensor, a second torque sensor, and a third servo motor 92. The third servo motor 92 is transmitted to the connecting member 91, and then controls the pressing member 3 to move in the first direction. The first torque sensor is arranged on the first rotating body 21 to detect the torque of the first rotating body 21, and the second torque sensor is arranged on the second rotating body 5 to detect the torque of the second rotating body 5. As the test roller 2 rotates, friction will be generated between the flexible device 6 and the outer wall of the test roller 2, and the magnitude of the frictional force will affect the torques of the first rotating body 21 and the second rotating body 5. When the flexible device 6 is in a tensioned state on the test roller 2, the torques of the first rotating body 21 and the second rotating body 5 meet specific requirements. The third servo motor 92, the first torque sensor, and the second torque sensor are all electrically connected to the control board, and the control board is based on w 1 and w 2 The position of the pressing member 3 in the first direction is adjusted according to the current specific values, so that the torques of the first rotating body 21 and the second rotating body 5 match w 1 and w 2 , so that the part of the flexible device 6 at the test roller 2 can achieve continuous change of the bending diameter on the basis of ensuring that the bending shape is in place, thereby meeting the aforementioned detection requirements.

[0068] In addition, in this embodiment, the winding directions of the thin film 22 on the first rotating body 21 and the second rotating body 5 are the same. Therefore, the first rotating body 21 and the second rotating body 5 need to rotate simultaneously in opposite directions to realize winding of the thin film 22 by one of them and releasing of the thin film 22 by the other.

[0069] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0070] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A flexible device bending performance detection device, It is characterized in that include: Bracket; A test roller, the test roller comprising a first rotating body and a film at least partially fixed and / or wound on an outer wall of the first rotating body, the first rotating body being rotatably disposed on the bracket to retract and release the film; and Two pressure members, the rotation axis of the first rotating body is located between the two pressure members, and the pressure members are movably arranged on the bracket to make the part of the flexible device at the test roller bend and fit on the film.

2. The flexible device bending performance detection device according to claim 1, It is characterized in that The flexible device bending performance detection device further comprises a second rotator rotatably arranged on the bracket, and a part of the film is fixed and / or wound on the second rotator.

3. The flexible device bending performance detection device according to claim 2, It is characterized in that The flexible device bending performance detection device also includes a first torque sensor, a second torque sensor, a control board, and a third servo motor. The third servo motor is transmitted to the pressure member. The first torque sensor is arranged on the first rotating body, and the second torque sensor is arranged on the second rotating body. The third servo motor, the first torque sensor and the second torque sensor are all electrically connected to the control board.

4. The flexible device bending performance detection device according to claim 1, It is characterized in that The pressure member is movably arranged in a first direction, and a projection of the pressure member in the first direction is located outside the film.

5. The flexible device bending performance detection device according to claim 1, It is characterized in that The first rotating body is in a rod shape.

6. The flexible device bending performance detection device according to claim 1, It is characterized in that The flexible device bending performance detection device further comprises two clamping units for clamping the flexible device, and the two pressure applying members are located between the two clamping units.

7. The flexible device bending performance detection device according to claim 6, It is characterized in that The flexible device bending performance detection device also includes a connecting piece, the two pressure pieces are both rod-shaped and fixed in parallel on the connecting piece, the connecting piece is movably arranged on the bracket along a first direction, the rotation axis of the first rotating body is parallel to the pressure piece, and the two pressure pieces are symmetrical about the rotation axis of the first rotating body.

8. The flexible device bending performance detection device according to claim 7, It is characterized in that The flexible device bending performance detection device also includes a second rotating body rotatably arranged on the bracket, a portion of the film is wrapped around the second rotating body, the first rotating body and the second rotating body are both rod-shaped and parallel to each other, the first rotating body and the second rotating body are arranged opposite to each other in a first direction, and the film has the same winding direction on the first rotating body and the second rotating body.

9. The flexible device bending performance detection device according to claim 8, It is characterized in that The flexible device bending performance detection device also includes a control board, a first servo motor and a second servo motor, the first servo motor is transmitted to the first rotor, the second servo motor is transmitted to the second rotor, and the first servo motor and the second servo motor are both electrically connected to the control board to allow the first rotor and the second rotor to rotate simultaneously in opposite directions and to match the rotational speeds of the first rotor and the second rotor.

10. The flexible device bending performance detection device according to claim 6, It is characterized in that The clamping unit comprises a clamping seat and a clamping cover plate, the clamping seat has a clamping surface, and the clamping cover plate is detachably installed on the clamping surface.

11. A method for detecting bending performance of a flexible device, It is characterized in that Based on the flexible device bending performance detection device according to any one of claims 1 to 10, the method comprises: Rotating the first rotating body to retract and release the film on the first rotating body, thereby changing the outer diameter of the test roller; placing a flexible device on the outer wall surface of the test roller; The two pressure members squeeze the side of the flexible device facing away from the test roller, so that the part of the flexible device at the test roller is attached to the outer wall surface of the test roller and converted into a tensioned state.

12. The method for detecting bending performance of a flexible device according to claim 11, It is characterized in that The second rotor and the first rotor are rotated, one of the first rotor and the second rotor releases the film, and the other of the first rotor winds up the film.

13. The method for detecting bending performance of a flexible device according to claim 11, It is characterized in that The first rotor and the second rotor rotate simultaneously, and the first servo motor and the second servo motor control the rotation speed of the first rotor and the second rotor respectively, so that the speed at which the film is released by one of the first rotor and the second rotor is equal to the speed at which the film is wound by the other, and the pressure member is controlled to move while the first rotor and the second rotor rotate, so that the part of the flexible device at the test roller is always in a tensioned state.

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