Arc-shaped curved surface pressing device with pressure detection function

Abstract

This invention relates to the field of pressure detection technology, and particularly to a pressure application device for an arc-shaped curved surface with pressure detection. The device includes a movable pressure application part and a pressure sensor. The movable pressure application part has an arc-shaped pressure application surface adapted to the arc-shaped curved surface of the object to be tested. The movable pressure application part applies pressure to the arc-shaped curved surface of the object to be tested through the arc-shaped pressure application surface. The pressure sensor includes a flexible pressure sensing plate, which includes a pressure sensing part and a movable part extending along the pressure sensing part. The pressure sensing part and the movable part are disposed on the movable pressure application part and are movable relative to the arc-shaped pressure application surface. The pressure sensing part is disposed corresponding to the arc-shaped pressure application surface and at least covers a portion of the arc-shaped pressure application surface. When the arc-shaped pressure application surface applies pressure to the arc-shaped curved surface of the object to be tested, the pressure sensing part is sandwiched between the arc-shaped pressure application surface and the arc-shaped curved surface of the object to be tested. The pressure data obtained by the pressure sensing part can more realistically and accurately reflect the pressure condition of the arc-shaped curved surface.

Description

Technical Field

[0001] This invention relates to the field of pressure detection technology, and in particular to an arc-shaped curved surface pressure application device with pressure detection. Background Technology

[0002] With societal development, the demands on electronic devices are increasing, especially regarding performance and user experience. The quality of components within electronic devices often affects their overall performance and user experience, making the processing and inspection of these components particularly important.

[0003] In the industrial manufacturing or verification of parts, a constant pressure is typically applied to the parts as a processing or inspection method to observe their stress distribution. Whether the pressure is uniform is a crucial factor affecting the processing or testing results. Existing pressure testing solutions primarily rely on rigid pressure sensors, placing multiple sensors on the pressure-bearing surface of the part. However, such pressure testing solutions are often only suitable for planar pressure surfaces; they are not applicable when the pressure-bearing surface of the part is curved. Summary of the Invention

[0004] To address the technical problem of pressure detection on curved surfaces when applying pressure, this invention provides a pressure application device for curved surfaces with pressure detection.

[0005] The solution to the technical problem of this invention is:

[0006] A pressure-sensing device for an arc-shaped curved surface is provided. The device includes a movable pressure-sensing part and a pressure sensor. The movable pressure-sensing part has an arc-shaped pressure-sensing surface adapted to the arc-shaped curved surface of the object to be tested. The movable pressure-sensing part applies pressure to the arc-shaped curved surface of the object to be tested through the arc-shaped pressure-sensing surface. The pressure sensor includes a flexible pressure sensing piece, which includes a pressure sensing part and a movable part extending along the pressure sensing part. The pressure sensing part and the movable part are disposed on the movable pressure-sensing part and are movable relative to the arc-shaped pressure-sensing surface. The pressure sensing part is disposed corresponding to the arc-shaped pressure-sensing surface and at least covers a portion of the arc-shaped pressure-sensing surface. When the arc-shaped pressure-sensing surface applies pressure to the arc-shaped curved surface of the object to be tested, the pressure sensing part is clamped between the arc-shaped pressure-sensing surface and the arc-shaped curved surface of the object to be tested and drives the movable part to move closer to the arc-shaped pressure-sensing surface.

[0007] In one embodiment, the arc-shaped pressure surface has an arc length, and the length of the pressure sensing part is not less than the arc length; when the arc-shaped pressure surface applies pressure to the arc-shaped curved surface of the object to be tested, the pressure sensing part is entirely or partially sandwiched between the arc-shaped pressure surface and the arc-shaped curved surface of the object to be tested.

[0008] In one embodiment, the flexible pressure sensing sheet has a movable part. One end of the pressure sensing part away from the movable part is fixed to the side of the movable pressure application part where the arc-shaped pressure application surface is provided. The movable part extends and bends in a direction away from the pressure sensing part so that a portion of the movable part is placed on a side different from the arc-shaped pressure application surface.

[0009] In one embodiment, the flexible pressure sensing sheet has two movable parts, which are respectively disposed at two opposite ends of the pressure sensing part; the pressure sensing part is disposed on the side where the arc-shaped pressure surface is provided, and the two movable parts extend and bend in a direction away from the pressure sensing part, so that a portion of the movable part is placed on a side different from the arc-shaped pressure surface.

[0010] In one embodiment, the movable pressure-applying part has two opposite sides adjacent to the arc-shaped pressure-applying surface, and the movable part at one end of the pressure-sensing part extends in a direction away from the pressure-sensing part and bends to one of the opposite sides; the other movable part extends in a direction away from the pressure-sensing part and bends to the other opposite side.

[0011] In one embodiment, the movable pressure-applying part is further provided with a limiting protrusion and a limiting through hole. The limiting protrusion and the arc-shaped pressure-applying surface are respectively located on different sides of the movable pressure-applying part. The movable part extends in a direction away from the pressure sensing part and passes through the limiting through hole to bend to the side where the limiting protrusion is provided. The end of the movable part away from the pressure sensing part is fixed to the side of the movable pressure-applying part where the limiting protrusion is provided so that the movable part at least covers part of the limiting protrusion.

[0012] In one embodiment, the movable pressure application part includes a driving device, a pressure block, and a support. The driving device is connected to the pressure block and drives the pressure block away from or towards the object to be tested. The pressure block is provided with a boss, and the arc-shaped pressure surface is disposed on the boss. The support is detachably connected to the pressure block, and a limiting through hole is disposed on the support. The support is provided with a positioning hole corresponding to the position of the boss. The inner contour of the positioning hole is adapted to the outer contour of the boss. The boss passes through the positioning hole so that the arc-shaped pressure surface protrudes from the positioning hole.

[0013] In one embodiment, elastic elements are respectively provided on two opposite sides of the positioning hole of the bracket, and the elastic elements define a clamping space. The inner contour of the clamping space is smaller than the outer contour of the boss. When the bracket is sleeved on the pressure block, the boss presses the elastic elements provided on the two opposite sides of the positioning hole to pass through the clamping space, and the bracket is clamped on the boss by the two elastic elements.

[0014] In one embodiment, the arc-shaped surface pressure device further includes an elastic membrane disposed on the side of the pressure sensing part facing the object to be measured; and / or the elastic membrane is disposed on the arc-shaped pressure surface and is in contact with the arc-shaped pressure surface.

[0015] In one embodiment, the pressure sensor further includes a data acquisition unit and a display device. The display device is communicatively connected to the data acquisition unit, and the data acquisition unit is electrically connected to the flexible pressure sensing sheet. The pressure sensing part is a continuous pressure detection surface, and the display device acquires and displays the pressure detection status of the pressure sensing part through the data acquisition unit. The pressure detection status is the pressure distribution and / or pressure magnitude of the arc-shaped curved surface.

[0016] Compared with existing technologies, the present invention provides a pressure-sensing device for curved surfaces with pressure detection. This device uses a pressure sensing unit clamped between the curved pressure surface and the curved surface of the object being tested to acquire pressure data applied to the curved surface by the movable pressure-sensing unit. Since the pressure sensing unit is in close contact with the curved surface, the pressure data acquired by the unit more accurately reflects the pressure condition of the curved surface. This curved surface pressure-sensing device not only improves the accuracy of pressure detection on curved surfaces but also extends the service life of the flexible pressure sensing element, thus possessing high practical and promotional value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an arc-shaped curved surface pressure application device with pressure detection provided in an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Enlarged view of A in the middle;

[0020] Figure 3 This is a schematic diagram of the structure of an arc-shaped curved surface pressure application device with pressure detection provided in an embodiment of the present invention;

[0021] Figure 4 yes Figure 3 Enlarged view of B in the middle;

[0022] Figure 5 This is a partial cross-sectional view of an arc-shaped curved surface pressure application device with pressure detection provided in an embodiment of the present invention;

[0023] Figure 6 This is a partial cross-sectional view of an arc-shaped curved surface pressure application device with pressure detection provided in another embodiment of the present invention;

[0024] Figure 7 yes Figure 5 Enlarged view of C;

[0025] Figure 8 This is a schematic diagram of the structure of the movable pressure application part provided in an embodiment of the present invention;

[0026] Figure 9 This is an exploded schematic diagram of the movable pressure application part provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 1. Moving pressure application part; 2. Pressure sensor;

[0029] 11. Arc-shaped pressure surface; 12. Limiting protrusion; 13. Limiting through hole; 14. Drive device; 15. Pressure block; 16. Support; 21. Flexible pressure sensing element; 22. Data collector; 23. Display device;

[0030] 151. Boss; 161. Positioning hole; 162. Elastic element; 211. Pressure sensing part; 212. Movable part. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] It should be noted that the terms "first" and "second" in the specification and claims of this invention are used to distinguish different objects, rather than to describe a specific order.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0037] Please see Figures 1 to 5 The first embodiment of the present invention provides a curved surface pressure application device with pressure detection, used to apply pressure to the curved surface of a test object and to detect the magnitude and / or pressure distribution of the pressure on the curved surface of the test object. The curved surface pressure application device includes a movable pressure application part 1 and a pressure sensor 2. The movable pressure application part 1 is provided with a contact point with the curved surface of the test object (e.g., ...). Figure 1 and Figure 2 As shown in (a) of the diagram, an arc-shaped pressure surface 11 is adapted to the curved surface of the object to be tested. The movable pressure part 1 applies pressure to the arc-shaped curved surface of the object to be tested through the arc-shaped pressure surface 11. The pressure sensor 2 includes a flexible pressure sensing piece 21, which includes a pressure sensing part 211 and a movable part 212 extending along the pressure sensing part 211. The pressure sensing part 211 and the movable part 212 are disposed on the movable pressure part 1 and are movable relative to the arc-shaped pressure surface 11. The pressure sensing part 211 is disposed corresponding to the arc-shaped pressure surface 11 and at least covers a portion of the arc-shaped pressure surface 11. When the movable pressure part 1 applies pressure to the arc-shaped curved surface of the object to be tested through the arc-shaped pressure surface 11, the pressure sensing part 211 is clamped between the arc-shaped pressure surface 11 and the arc-shaped curved surface of the object to be tested and drives the movable part 212 to move closer to the arc-shaped pressure surface 11.

[0038] In this embodiment, the movable setting refers to the ability to change the relative positions between the pressure sensing unit 211 and the movable unit 212 and the arc-shaped pressure surface 11. For example... Figure 2 As shown, in the initial state, that is, when the movable pressure applying part 1 does not need to apply pressure to the curved surface of the object to be measured, the pressure sensing part 211 and the curved pressure applying surface 11 maintain a distance; as Figure 5 As shown, when the movable pressure unit 1 applies pressure to the curved surface of the object under test through the arc-shaped pressure surface 11, the pressure sensing unit 211 is squeezed and moves closer to the arc-shaped pressure surface 11. At the same time, the pressure sensing unit 211 drives the movable unit 212 to move closer to the arc-shaped pressure surface 11.

[0039] Understandably, in this embodiment, the movable pressure applying part 1 applies pressure to the curved surface of the test object via the arc-shaped pressure applying surface 11. Therefore, when the movable pressure applying part 1 approaches the test object to apply pressure, the pressure sensing part 211 covering the arc-shaped pressure applying surface 11 is pushed by the arc-shaped pressure applying surface 11 to contact the curved surface of the test object until the pressure sensing part 211 is clamped between the arc-shaped pressure applying surface 11 and the curved surface of the test object. At this time, the pressure sensing part 211 clamped between the arc-shaped pressure applying surface 11 and the curved surface of the test object is subjected to the squeezing force of the arc-shaped pressure applying surface 11. In this embodiment, since the flexible pressure sensing sheet 21 has a certain degree of flexibility and the pressure sensing part 211 is movable relative to the arc-shaped pressure applying surface 11, when the pressure sensing part 211 is subjected to the squeezing force of the arc-shaped pressure applying surface 11, the pressure sensing part 211 can change its shape according to the direction of the squeezing force. Because the curved pressure surface 11 is adapted to the curved surface of the object under test, the pressure sensing part 211, which is held between the curved pressure surface 11 and the curved surface of the object under test, can fit into the curved surface of the object under test during the process of applying pressure to the curved surface of the object under test. During the process of the pressure sensing part 211 fitting into the curved surface of the object under test, the pressure sensing part 211 gradually becomes curved. At this time, the pressure sensing part 211 will pull the movable part 212 along the direction of deformation. Since the movable part 212 is movable relative to the curved pressure surface 11, it can move along the deformation direction of the pressure sensing part 211. In other words, the pressure sensing part 211 can drive the movable part 212 to move closer to the curved pressure surface 11, thus avoiding plastic deformation caused by the pressure sensing part 211 being unable to release the pulling force during the process of fitting into the curved surface of the object under test.

[0040] In this embodiment, the pressure sensing unit 211, which is clamped between the arc-shaped pressure application surface 11 and the arc-shaped curved surface of the object to be tested, can acquire the pressure data applied to the arc-shaped curved surface by the movable pressure application unit 1. Since the pressure sensing unit 211 is in close contact with the arc-shaped curved surface, the pressure data acquired by the pressure sensing unit 211 can more realistically and accurately reflect the pressure condition of the arc-shaped curved surface. The arc-shaped curved surface pressure application device provided in this embodiment of the invention not only improves the accuracy of pressure detection on arc-shaped curved surfaces but also further extends the service life of the flexible pressure sensing piece 21, possessing high practical and promotional value.

[0041] Understandably, in this embodiment, the matching of the arc-shaped pressure surface 11 with the arc-shaped surface of the object under test means that the arc-shaped pressure surface 11 has a surface that is the same as or similar to the arc-shaped surface of the object under test. When the arc-shaped surface of the object under test is a surface with an arc-shaped protrusion, the movable pressure part 1 is provided with an arc-shaped groove that matches the arc-shaped protrusion, and the surface of the arc-shaped groove is the arc-shaped pressure surface 11; when the arc-shaped surface of the object under test is the surface of an arc-shaped groove, the movable pressure part 1 is provided with an arc-shaped protrusion that matches the arc-shaped groove, and the surface of the arc-shaped protrusion is the arc-shaped pressure surface 11. This embodiment uses the example of the movable pressure part 1 having an arc-shaped groove and the surface of the arc-shaped groove being the arc-shaped pressure surface 11 as an example for illustration, but it is not intended to be limiting.

[0042] Understandably, when detecting the magnitude of the compressive force on the curved surface of an object, the size of the pressure sensing unit 211 needs to be determined based on the size of the area to be detected on the curved surface. The pressure sensing unit 211 can be smaller than the area to be detected on the curved surface to detect a portion of the curved surface, or it can be larger than or equal to the area to be detected on the curved surface to detect the entire area.

[0043] Please combine Figure 4 and Figure 5 As one implementation method, in this embodiment, the arc-shaped pressure surface 11 has an arc length (e.g., Figure 5 (as indicated by b in the text), the length of the pressure sensing unit 211 (e.g., ... Figure 5 The arc length (as indicated by c) is not less than the arc length. When the arc-shaped pressure surface 11 applies pressure to the arc-shaped surface of the object to be measured, the pressure sensing unit 211 is wholly or partially clamped between the arc-shaped pressure surface 11 and the arc-shaped surface of the object to be measured.

[0044] Understandably, the arc-shaped surface pressure device provided in this embodiment mainly applies pressure to the arc-shaped surface of the object under test through the arc-shaped pressure surface 11. If the arc-shaped pressure surface 11 is not smaller than the arc-shaped surface of the object under test, that is, the arc length of the arc-shaped pressure surface 11 is not smaller than the arc length of the arc-shaped surface of the object under test, then when pressure is applied to the arc-shaped surface of the object under test, the entire arc-shaped surface of the object under test is squeezed by the arc-shaped pressure surface 11; if the arc-shaped pressure surface 11 is smaller than the arc-shaped surface of the object under test, that is, the arc length of the arc-shaped pressure surface 11 is smaller than the arc length of the arc-shaped surface of the object under test, then when pressure is applied to the arc-shaped surface of the object under test, the portion of the arc-shaped surface of the object under test corresponding to the arc-shaped pressure surface 11 is squeezed by the arc-shaped pressure surface 11. In this embodiment, the length of the pressure sensing unit 211 is not less than the arc length of the arc-shaped pressure surface 11. When the arc-shaped pressure surface 11 applies pressure to the arc-shaped curved surface of the object to be tested, the pressure sensing unit 211 is wholly or partially clamped between the arc-shaped pressure surface 11 and the arc-shaped curved surface of the object to be tested. That is, the pressure sensing unit 211 can detect the magnitude of the pressure applied by the arc-shaped pressure surface 11 in the arc-length region, and can more comprehensively reflect the magnitude of the pressure exerted by the arc-shaped pressure surface 11 on the object to be tested. At the same time, as the pressure sensing unit 211 moves the movable part 212 closer to the arc-shaped pressure surface 11, since the length of the pressure sensing unit 211 is not less than the arc length of the arc-shaped pressure surface 11, the movable part 212 will not be clamped between the arc-shaped pressure surface 11 and the arc-shaped curved surface of the object to be tested. The end of the pressure sensing unit 211 connected to the movable part 212 is released, thereby avoiding the pressure sensing unit 211 from being subjected to force and undergoing plastic deformation.

[0045] The present invention does not impose a specific limitation on the number of movable parts 212. The flexible pressure sensing sheet 21 may have only one movable part 212 or two movable parts 212.

[0046] Please see Figure 6 In one embodiment, the flexible pressure sensing piece 21 has a movable portion 212. One end of the pressure sensing portion 211 away from the movable portion 212 is fixed to the side of the movable pressure applying portion 1 where the arc-shaped pressure surface 11 is located. The movable portion 212 extends and bends in a direction away from the pressure sensing portion 211, so that a portion of the movable portion 212 is positioned on a side different from the arc-shaped pressure surface 11. Specifically, the movable pressure applying portion 1 has two opposite sides adjacent to the arc-shaped pressure surface 11 (e.g., ...). Figure 6As shown on the m and n sides, the end of the pressure sensing part 211 away from the movable part 212 is fixed to the side of the movable pressure applying part 1 with the arc-shaped pressure surface 11 and close to one of the opposite sides (as shown on the m side in the figure); the movable part 212 extends away from the pressure sensing part 211 and bends to the other opposite side (as shown on the n side in the figure), and the end of the movable part 212 away from the pressure sensing part 211 is fixed to this side (as shown on the n side in the figure), so that the movable part 212 is respectively located on the side of the movable pressure applying part 1 with the arc-shaped pressure surface 11 and the opposite side adjacent to the arc-shaped pressure surface 11.

[0047] Understandably, in this embodiment, by fixing the end of the pressure sensing part 211 away from the movable part 212 and the end of the movable part 212 away from the pressure sensing part 211, the pressure sensing part 211 can be positioned on the movable pressure applying part 1 and maintain a certain gap with the arc-shaped pressure applying surface 11 in the initial state, so that the pressure sensing part 211 can move relative to the arc-shaped pressure applying surface 11. Since the movable part 212 is connected to the pressure sensing part 211, it can also move relative to the arc-shaped pressure applying surface 11 under the action of the pressure sensing part 211.

[0048] Understandably, when the arc-shaped pressure surface 11 applies pressure to the arc-shaped curved surface of the object under test, the movable part 212 is not clamped between the arc-shaped pressure surface 11 and the arc-shaped curved surface of the object under test. In this embodiment, the movable part 212 is disposed on the side of the movable pressure part 1 where the arc-shaped pressure surface 11 is located and on the opposite side adjacent to the arc-shaped pressure surface 11. By disposing the movable part 212 on different sides, it is possible to avoid the accumulation of the movable part 212 on the side where the arc-shaped pressure surface 11 is located. The movable part 212 disposed on the side of the arc-shaped pressure surface 11 can better follow the deformation of the pressure sensing part 211 when it is squeezed by the arc-shaped pressure surface 11, thereby reducing the pulling force on the movable part 212 when the pressure sensing part 211 moves.

[0049] Please see Figure 5 In another embodiment, the flexible pressure sensing sheet 21 has two movable portions 212, which are respectively disposed at two opposite ends of the pressure sensing portion 211. The pressure sensing portion 211 is disposed on the side with the arc-shaped pressure surface 11. The two movable portions 212 extend and bend in a direction away from the pressure sensing portion 211, so that a portion of the movable portion 212 is placed on a side different from the arc-shaped pressure surface 11. Specifically, the movable pressure portion 1 has two opposite sides adjacent to the arc-shaped pressure surface 11 (e.g., ...). Figure 5 (As shown on the m and n sides), the movable part 212 at one end of the pressure sensing part 211 extends in a direction away from the pressure sensing part 211 and bends to one of the opposite sides (as shown on the m and n sides). Figure 5(m side); another movable part 212 extends in a direction away from the pressure sensing part 211 and bends to the other opposite side (e.g., m side); Figure 5 The two movable parts 212 are respectively located on one side of the movable pressure part 1 where the arc-shaped pressure surface 11 is provided and on two opposite sides adjacent to the arc-shaped pressure surface 11. It can be understood that, compared to the above embodiment, the pressure sensing part 211 has movable parts 212 at both ends. These movable parts 212 at both ends can completely release the tensile force generated when the pressure sensing part 211 deforms under the pressure of the arc-shaped pressure surface 11, further extending the service life of the pressure sensing part 211.

[0050] Please continue reading. Figures 1 to 4 Furthermore, the pressure sensor 2 further includes a data acquisition unit 22 and a display device 23. The display device 23 is communicatively connected to the data acquisition unit 22, and the data acquisition unit 22 is electrically connected to the flexible pressure sensing sheet 21. The pressure sensing part 211 is a continuous pressure detection surface, and the display device 23 acquires and displays the pressure detection status of the pressure sensing part 211 through the data acquisition unit 22. This pressure detection status is the pressure distribution and / or pressure magnitude of the curved surface.

[0051] Understandably, this embodiment applies pressure to the curved surface through the arc-shaped pressure surface 11. Therefore, when detecting the magnitude of the compressive force on the curved surface, pressure detection should be performed on at least a portion of the curved surface. If only a single point of pressure is detected on the curved surface, it is difficult to obtain the pressure magnitude in other parts of the curved surface, and it is also difficult to obtain the pressure magnitude variation on the continuous surface of the curved surface. In this embodiment, the pressure sensing unit 211 is a continuous pressure detection surface. When the pressure sensing unit 211 is clamped between the arc-shaped pressure surface 11 and the curved surface of the object to be tested, the display device 23 can obtain the pressure distribution and / or pressure magnitude of the area of ​​the curved surface of the object to be tested corresponding to the pressure sensing unit 211 through the data acquisition unit 22. The display device 23 displays the pressure distribution and / or pressure magnitude of the curved surface of the object under test, so that the user can obtain the pressure distribution on the curved surface more objectively and accurately. This makes it easier for the user to adjust the pressure applied to the curved surface by the curved pressure surface 11 according to the specific situation, and further improves the practicality of the curved surface pressure device.

[0052] Of course, if there is a protrusion on the curved surface of the object to be tested, the pressure sensing unit 211 can also be a pressure detection surface with a clearance hole, and the clearance hole is provided corresponding to the protrusion. In this way, when the pressure sensing unit 211 is held between the curved pressure application surface 11 and the curved surface of the object to be tested, the protrusion can pass through the clearance hole.

[0053] The present invention does not impose specific restrictions on the type of display device 23, as long as the display device 23 can display the pressure distribution and / or pressure magnitude. The display device 23 can be an electronic device with a display screen, such as a host computer, computer, or mobile phone.

[0054] This invention does not impose specific limitations on the structural configuration of the flexible pressure sensing element 21. As one embodiment, in this embodiment, the flexible pressure sensing element 21 includes a flexible base layer, an electrode layer, and a flexible sensing material layer. The electrode layer is disposed on the flexible base layer and is positioned opposite to the flexible sensing material layer to form a pressure sensing part 211. When the pressure sensing part 211 is compressed, the contact area between the flexible sensing material layer and the electrode layer changes with the pressure magnitude, thereby generating a change in electrical signal. The data acquisition unit 22 can obtain the corresponding pressure magnitude by acquiring the changing electrical signal.

[0055] Please combine Figure 5 and Figure 7 Furthermore, the movable pressure application part 1 is further provided with a limiting protrusion 12 and a limiting through hole 13. The limiting protrusion 12 and the arc-shaped pressure application surface 11 are respectively provided on different sides of the movable pressure application part 1. The movable part 212 extends in a direction away from the pressure sensing part 211 and passes through the limiting through hole 13 to bend to the side where the limiting protrusion 12 is provided. The end of the movable part 212 away from the pressure sensing part 211 is fixed to the side of the movable pressure application part 1 where the limiting protrusion 12 is provided so that the movable part 212 at least covers part of the limiting protrusion 12.

[0056] Specifically, the limiting through-hole 13 has two interconnected openings, one of which is located on the same side as the arc-shaped pressure surface 11, and the other opening is located on the same side as the limiting protrusion 12. The movable part 212 extends away from the pressure sensing part 211 and passes through the limiting through-hole 13 through the two openings. The limiting through-hole 13 allows the movable part 212 to be bent so that part of the movable part 212 is located on the same side as the arc-shaped pressure surface 11 and part is located on the same side as the limiting protrusion 12. The movable part 212 located on the same side as the limiting protrusion 12 continues to extend to cover the limiting protrusion 12. By fixing one end of the movable part 212 away from the pressure sensing part 211 to the side of the movable pressure part 1 where the limiting protrusion 12 is located, the movable part 212 can be movably disposed relative to the limiting protrusion 12.

[0057] Understandably, during the process of the pressure sensing unit 211 conforming to the curved surface of the object to be tested, the pressure sensing unit 211 will drive the movable part 212 to move closer to the curved pressure surface 11. The movable part 212 passes through the limiting through hole 13, which restricts the direction of movement of the movable part 212. Therefore, the movable part 212 can only move along the direction closer to the pressure sensing unit 211, so that the pressure sensing unit 211 can better conform to the curved surface of the object to be tested, until the pressure sensing unit 211 is clamped between the curved pressure surface 11 and the curved surface of the object to be tested. After the curved pressure surface 11 has finished applying pressure to the curved surface of the object to be tested, the curved pressure surface 11 moves away from the object to be tested. At this time, the pressure sensing unit 211 is no longer clamped between the curved pressure surface 11 and the curved surface, and the pressure sensing unit 211 and the movable part 212 will gradually return to their original deformation. Since the movable part 212 passes through the limiting through hole 13 and covers the limiting protrusion 12, the deformation direction of the movable part 212 can be limited by the cooperation of the limiting protrusion 12 and the limiting through hole 13 during the gradual recovery of the movable part 212's deformation, so that it can recover or approximately recover to its initial state. In this embodiment, the movable part 212 is in contact with the limiting protrusion 12 and the limiting through hole 13. The static friction between the movable part 212 and the limiting protrusion 12 and the limiting through hole 13 can prevent the movable part 212 from automatically moving towards the arc-shaped pressure surface 11 under the action of gravity, further improving the reliability of the arc-shaped curved surface pressure device during repeated use.

[0058] The present invention does not specifically limit the manner in which the end of the movable part 212 away from the pressure sensing part 211 is fixed to the movable pressure applying part 1. The end of the movable part 212 away from the pressure sensing part 211 can be fixed to the movable pressure applying part 1 by adhesive bonding or by snap-fit. In this embodiment, the end of the movable part 212 away from the pressure sensing part 211 is fixed to the movable pressure applying part 1 by adhesive bonding.

[0059] Understandably, when the flexible pressure sensing pad 21 is provided with two movable parts 212, such as Figure 5 As shown, the movable pressure-applying part 1 is provided with two limiting protrusions 12 and two limiting through holes 13. The two limiting protrusions 12 are respectively provided on different sides, so that each movable part 212 is provided with a corresponding limiting protrusion 12. The structure and function of the limiting protrusions 12 and the limiting through holes 13 have been described above, and will not be repeated here.

[0060] Please combine Figure 1 , Figure 3 , Figure 8 and Figure 9The movable pressure application part 1 specifically includes a drive device 14, a pressure block 15, and a bracket 16. The drive device 14 is connected to the pressure block 15 and drives the pressure block 15 away from or towards the object to be tested. The pressure block 15 is provided with a boss 151, and an arc-shaped pressure surface 11 is provided on the boss 151. The bracket 16 is detachably connected to the pressure block 15, and a limiting through hole 13 is provided on the bracket 16. The bracket 16 is provided with a positioning hole 161 corresponding to the position of the boss 151. The inner contour of the positioning hole 161 is adapted to the outer contour of the boss 151, and the boss 151 passes through the positioning hole 161 so that the arc-shaped pressure surface 11 protrudes out of the positioning hole 161.

[0061] Understandably, since the inner contour of the positioning hole 161 matches the outer contour of the boss 151, the bracket 16 can be quickly positioned on the pressure block 15 through the fit between the positioning hole 161 and the boss 151, making the installation of the bracket 16 easier. Simultaneously, since the boss 151 protrudes from the positioning hole 161, when the bracket 16 is fitted onto the boss 151, the arc-shaped pressure surface 11 can pass through the positioning hole 161 and protrude from it. Thus, when pressure is applied to the arc-shaped surface of the object being tested through the arc-shaped pressure surface 11, collisions between the bracket 16 and the arc-shaped surface of the object being tested can be avoided. In this embodiment, the limiting through hole 13 is set on the bracket 16, and the bracket 16 and the pressure block 15 are detachably connected. In this way, when installing or replacing the flexible pressure sensing piece 21, the movable part 212 of the flexible pressure sensing piece 21 can be passed through the limiting through hole 13 first, and the relative position of the flexible pressure sensing piece 21 and the bracket 16 can be adjusted before the bracket 16 is installed on the pressure block 15. This setting further improves the convenience for users to install and remove the flexible pressure sensing piece 21.

[0062] It is understood that in this embodiment, the inner contour of the positioning hole 161 and the outer contour of the boss 151 are adapted to each other, meaning that the movable pressure part 1 and the outer contour of the boss 151 are the same or approximately the same.

[0063] The present invention does not impose specific limitations on the detachable connection method between the bracket 16 and the pressure block 15. In one embodiment, the bracket 16 can be fixed to the pressure block 15 by fasteners; in another embodiment, the bracket 16 can be clamped to the pressure block 15 by elastic elements.

[0064] In one embodiment, the bracket 16 is fixed to the pressure block 15 by fasteners. Specifically, the pressure block 15 is further provided with threaded holes, and the bracket 16 is further provided with countersunk holes corresponding to the threaded holes. The stud portion of the bolt passes through the countersunk holes and is threadedly connected to the threaded holes to realize the connection between the bracket 16 and the pressure block 15.

[0065] Please continue reading. Figure 8 and Figure 9In another embodiment, the bracket 16 is clamped onto the pressure block 15 by elastic elements. Specifically, elastic elements 162 are respectively provided on both opposite sides of the positioning hole 161 of the bracket 16. The elastic elements 162 define a clamping space, the inner contour of which is smaller than the outer contour of the boss 151. When the bracket 16 is fitted onto the pressure block 15, the boss 151 presses against the elastic elements 162 provided on both opposite sides of the positioning hole 161 to pass through the clamping space, and the bracket 16 is clamped onto the boss 151 by the two elastic elements 162.

[0066] Understandably, since the inner contour of the clamping space is smaller than the outer contour of the boss 151, when the boss 151 passes through the clamping space 163, the boss 151 will inevitably compress the elastic member 162. At this time, the elastic member 162 changes the size of the clamping space through elastic deformation so that the boss 151 can pass through the clamping space. The elastic member 162, which undergoes elastic deformation, will exert a compressive force on the boss 151, thereby increasing the friction between the elastic member 162 and the boss 151. Understandably, a larger friction force can make the bracket 16 clamp onto the boss 151.

[0067] Understandably, the elastic element 162 can also be provided around the inner circumference of the positioning hole 161. For example, when the outer contour of the boss 151 is quadrilateral, the inner contour of the positioning hole 161 is a quadrilateral that matches the outer contour of the boss 151, and the elastic element 162 can be provided on all four sides of the positioning hole 161. When the outer contour of the boss 151 is circular, the inner contour of the positioning hole 161 is a circle that matches the outer contour of the boss 151, and the elastic element 162 can be provided around the circumference of the positioning hole 161.

[0068] This embodiment does not specifically limit the type of elastic element 162, as long as the elastic deformation of the elastic element 162 can allow the bracket 16 to be clamped on the boss 151. Preferably, the elastic element 162 can be silicone or foam.

[0069] This embodiment does not impose specific restrictions on the way the elastic element 162 is fixed on the bracket 16. As an optional implementation, the elastic element 162 is fixed on the bracket 16 by adhesive bonding.

[0070] Furthermore, the arc-shaped surface pressure device further includes an elastic membrane (not shown), which is disposed on the side of the pressure sensing unit 211 facing the object to be measured, and / or the elastic membrane is disposed on the arc-shaped pressure surface 11 and is in contact with the arc-shaped pressure surface 11.

[0071] Understandably, when applying pressure to the curved surface of the test object through the curved pressure surface 11, it cannot be guaranteed that the curved pressure surface 11 will completely conform to the curved surface; that is, there may be a gap between the curved pressure surface 11 and the curved surface. Thus, when applying pressure to the curved surface of the test object through the curved pressure surface 11, the pressure sensing part 211, which is sandwiched between the curved pressure surface 11 and the curved surface, cannot completely conform to the curved surface, making it difficult to obtain accurate pressure information and affecting the pressure detection results. In this embodiment, by providing an elastic membrane on the side of the pressure sensing part 211 facing the test object, and / or providing an elastic membrane on the curved pressure surface 11, when applying pressure to the curved surface of the test object through the curved pressure surface 11, the elastic membrane is sandwiched between the curved pressure surface 11 and the curved surface. In this way, the deformation of the elastic membrane can reduce the influence of the gap between the curved pressure surface 11 and the curved surface. Understandably, when the arc-shaped pressure surface 11 applies pressure to the arc-shaped curved surface of the object to be tested, the elastic membrane clamped between the arc-shaped pressure surface 11 and the arc-shaped curved surface is subjected to force and transmits the pressure to the pressure sensing unit 211 in the first time. The pressure sensing unit 211 can accurately detect the pressure magnitude in the corresponding area, effectively improving the accuracy of pressure detection.

[0072] This embodiment does not specifically limit the type of elastic membrane, as long as the elastic deformation of the elastic membrane allows the pressure applied by the arc-shaped pressure surface 11 to be transmitted to the pressure sensing unit 211. Preferably, the elastic membrane is an elastic silicone film.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An arc-shaped curved surface pressure application device with pressure detection, characterized in that: The arc-shaped surface pressure device includes a movable pressure application part and a pressure sensor. The movable pressure application part is provided with an arc-shaped pressure application surface adapted to the arc-shaped surface of the object to be tested. The movable pressure application part applies pressure to the arc-shaped surface of the object to be tested through the arc-shaped pressure application surface. The pressure sensor includes a flexible pressure sensing sheet, which includes a pressure sensing part and a movable part extending along the pressure sensing part. The pressure sensing part and the movable part are disposed on the movable pressure application part and are movable relative to the arc-shaped pressure application surface. The pressure sensing part is disposed corresponding to the arc-shaped pressure application surface and at least covers a portion of the arc-shaped pressure application surface. In the initial state, the pressure sensing unit maintains a certain gap with the arc-shaped pressure surface. When the arc-shaped pressure surface applies pressure to the arc-shaped curved surface of the object to be tested, the pressure sensing unit is clamped between the arc-shaped pressure surface and the arc-shaped curved surface of the object to be tested and drives the movable part to move closer to the arc-shaped pressure surface. The flexible pressure sensing sheet is provided with a movable part. One end of the pressure sensing part away from the movable part is fixed to the side of the movable pressure application part where the arc-shaped pressure surface is provided. The movable part extends and bends in a direction away from the pressure sensing part so that a portion of the movable part is placed on a side different from the arc-shaped pressure surface. The movable part provided on the side of the arc-shaped pressure surface can follow the deformation of the pressure sensing part when the pressure sensing part is squeezed by the arc-shaped pressure surface, thereby reducing the pulling force on the movable part when the pressure sensing part moves the movable part. The movable pressure-applying part is further provided with a limiting protrusion and a limiting through hole. The limiting protrusion and the arc-shaped pressure-applying surface are respectively located on different sides of the movable pressure-applying part. The movable part extends in a direction away from the pressure sensing part and passes through the limiting through hole to bend to the side where the limiting protrusion is provided. The end of the movable part away from the pressure sensing part is fixed to the side of the movable pressure-applying part where the limiting protrusion is provided so that the movable part at least covers part of the limiting protrusion.

2. The arc-shaped curved surface pressure device as described in claim 1, characterized in that: The arc-shaped pressure surface has an arc length, and the length of the pressure sensing part is not less than the arc length; when the arc-shaped pressure surface applies pressure to the arc-shaped surface of the object to be tested, the pressure sensing part is entirely or partially clamped between the arc-shaped pressure surface and the arc-shaped surface of the object to be tested.

3. The arc-shaped curved surface pressure device as described in claim 1, characterized in that: The flexible pressure sensing sheet has two movable parts, which are respectively disposed at two opposite ends of the pressure sensing part; The pressure sensing part is disposed on the side where the arc-shaped pressure surface is provided, and the two movable parts extend and bend in a direction away from the pressure sensing part, so that a portion of the movable parts is placed on a side different from the arc-shaped pressure surface.

4. The arc-shaped curved surface pressure device as described in claim 3, characterized in that: The movable pressure-applying part has two opposite sides adjacent to the arc-shaped pressure-applying surface. The movable part at one end of the pressure-sensing part extends in a direction away from the pressure-sensing part and bends to one of the opposite sides; the other movable part extends in a direction away from the pressure-sensing part and bends to the other opposite side.

5. The arc-shaped curved surface pressure application device as described in claim 1, characterized in that: The movable pressure application part includes a driving device, a pressure block and a support. The driving device is connected to the pressure block and drives the pressure block away from or towards the object to be tested. The pressure block is provided with a boss, and the arc-shaped pressure surface is provided on the boss; the bracket is detachably connected to the pressure block, the limiting through hole is provided on the bracket, and the bracket is provided with a positioning hole corresponding to the position of the boss. The inner contour of the positioning hole is adapted to the outer contour of the boss, and the boss passes through the positioning hole so that the arc-shaped pressure surface protrudes from the positioning hole.

6. The arc-shaped curved surface pressure application device as described in claim 5, characterized in that: The bracket has elastic elements on two opposite sides of the positioning hole, and the elastic elements define a clamping space. The inner contour of the clamping space is smaller than the outer contour of the boss. When the bracket is sleeved on the pressure block, the boss presses the elastic elements on the two opposite sides of the positioning hole to pass through the clamping space, and the bracket is clamped on the boss by the two elastic elements.

7. The arc-shaped curved surface pressure device as described in any one of claims 1-4, characterized in that: The arc-shaped curved surface pressure application device further includes an elastic membrane, which is disposed on the side of the pressure sensing part facing the object to be measured; And / or the elastic membrane is disposed on the arc-shaped pressure surface and is in contact with the arc-shaped pressure surface.

8. The arc-shaped curved surface pressure device as described in any one of claims 1-4, characterized in that: The pressure sensor further includes a data acquisition unit and a display device, wherein the display device is communicatively connected to the data acquisition unit, and the data acquisition unit is electrically connected to the flexible pressure sensing sheet. The pressure sensing unit is a continuous pressure detection surface, and the display device acquires and displays the pressure detection status of the pressure sensing unit through the collector; the pressure detection status is the pressure distribution and / or pressure magnitude of the arc-shaped surface.

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