Plate warping detection device and appearance detection equipment

Abstract

The embodiment of the utility model discloses a plate warpage measuring device and appearance detection equipment, the plate warpage measuring device comprises a first camera and an adjusting mechanism, the first camera is used for shooting a three-dimensional image of a plate to be measured, the adjusting mechanism comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly is connected with the first camera, and the second adjusting assembly is connected with the second camera. The first adjusting assembly is connected with the first camera and is used for adjusting the position of the first camera in a first direction, the second adjusting assembly is connected with the first adjusting assembly and is used for adjusting the positions of the first adjusting assembly and the first camera in a second direction, the first direction and the second direction form an included angle, and the first camera shoots a three-dimensional image of a to-be-detected plate; therefore, the height data of the to-be-detected plate can be calculated according to the image data of the three-dimensional image, the tilting degree of the to-be-detected plate is judged according to the height data of the to-be-detected plate, and the reliability and accuracy of the appearance detection result of the to-be-detected plate can be ensured by sorting and removing unqualified products caused by the tilting plate.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board detection, in particular to a device for measuring board warping and an appearance detection device. Background Art

[0002] An AVI (Automated Visual Inspection) appearance inspection machine is a device that detects product appearance defects through computer vision image technology. It usually uses a high-precision CCD (Charge-Coupled Device) camera and a micro-focus lens for image acquisition and uses image analysis and recognition algorithms to determine the results. This kind of appearance inspection machine can improve the efficiency of manual rejection and is widely used in the appearance inspection of products such as PCB (Printed Circuit Board) printed circuit boards.

[0003] The existing PCB board appearance inspection machine usually detects the appearance defects of the PCB board through a line-scan camera to determine whether the PCB board product is qualified. However, some of the PCB board products that pass the inspection still have unqualified phenomena caused by warped boards, resulting in insufficient shipping quality of the PCB board products. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for measuring board warping and an appearance detection device, aiming to solve the problem that some of the PCB board products that pass the inspection by the existing PCB board appearance inspection machine still have unqualified phenomena caused by warped boards, resulting in insufficient shipping quality of the PCB board products.

[0005] In a first aspect, the utility model provides a device for measuring board warping. The device for measuring board warping includes a first camera and an adjustment mechanism. The first camera is used to capture a three-dimensional image of a to-be-tested board member. The adjustment mechanism includes a first adjustment component and a second adjustment component. The first adjustment component is connected to the first camera and is used to adjust the position of the first camera in a first direction. The second adjustment component is connected to the first adjustment component and is used to adjust the positions of the first adjustment component and the first camera in a second direction. The first direction and the second direction are arranged at an angle.

[0006] In one of the embodiments, the first adjustment component includes an adjustment plate, a fixing plate, and a first adjustment member. The first camera is fixedly arranged on the adjustment plate. The adjustment plate is provided with a first adjustment hole extending along the first direction. The fixing plate is provided with a first fixing hole. The first adjustment member penetrates through any position of the first adjustment hole and is detachably connected to the hole wall of the first fixing hole to adjustably mount the adjustment plate on the fixing plate.

[0007] In one embodiment, two first adjustment holes are provided and symmetrically arranged on both sides of the first camera. Two groups of first fixing holes are provided and are arranged in one-to-one correspondence with the respective first adjustment holes. Each of the first fixing holes in each group is spaced along the first direction.

[0008] In one embodiment, the first adjustment assembly includes an adjustment plate, a fixing plate, and a first adjustment member. The first camera is fixedly arranged on the adjustment plate. A plurality of first adjustment holes are formed in the adjustment plate and are spaced along the first direction. A first fixing hole is formed in the fixing plate. The first adjustment member passes through one of the first adjustment holes and is detachably connected to the hole wall of the first fixing hole to adjustably mount the adjustment plate on the fixing plate.

[0009] In one embodiment, the second adjustment assembly includes an adjustment frame and a second adjustment member. The fixing plate is fixedly arranged or adjustably mounted along a third direction on the adjustment frame. A plurality of second adjustment holes are formed in the adjustment frame and are spaced along the second direction. The second adjustment member passes through one of the second adjustment holes and is detachably connected to the working surface to adjustably mount the adjustment plate on the working surface;

[0010] The third direction is arranged at an angle to the first direction and the second direction.

[0011] In one embodiment, the adjustment frame includes a bracket body and an adjustment base. Two adjustment bases are provided and are respectively arranged at both ends of the bracket body. A plurality of the second adjustment holes are respectively formed in each of the adjustment bases.

[0012] In one embodiment, the second adjustment assembly includes an adjustment frame and a second adjustment member. The fixing plate is fixedly arranged or adjustably mounted along a third direction on the adjustment frame. A second adjustment hole is formed in the adjustment frame and extends along the second direction. The second adjustment member passes through any position of the second adjustment hole and is detachably connected to the working surface to adjustably mount the adjustment plate on the working surface;

[0013] The third direction is arranged at an angle to the first direction and the second direction.

[0014] In one embodiment, the plate warping measurement device further includes a protective cover. The protective cover is fixedly arranged on the adjustment plate and covers the outside of the first camera;

[0015] Wherein, an opening for exposing the camera in the first camera is provided on the protective cover.

[0016] In one embodiment, the first camera is a 3D laser camera; and / or,

[0017] A receiving groove is formed on the adjusting plate close to one side of the first camera, and at least part of the first camera is received and positioned in the receiving groove.

[0018] In a second aspect, the present utility model further provides an appearance detection device, which includes a feeding device, a conveying device, a detection device, a discharging device, a support platform, and the board warping detection device according to any one of the above embodiments. The detection device and the board warping detection device are both arranged on the support platform. A detection surface for placing a to-be-detected board is formed on the support platform. The conveying device is used for conveying the to-be-detected board. The feeding device is used for transferring the to-be-detected board on the conveying device to the detection surface. The discharging device is used for transferring the to-be-detected board on the detection surface back to the conveying device. The detection device is used for taking a two-dimensional image of one side of the to-be-detected board.

[0019] Adopting the embodiment of the present utility model has the following beneficial effects:

[0020] By using the board warping detection device of the present utility model, the first camera takes a three-dimensional image of the to-be-detected board, so that the height data of the to-be-detected board can be calculated through the image data of the three-dimensional image. Furthermore, the warping degree of the to-be-detected board can be judged through the height data of the to-be-detected board. By sorting and removing the unqualified products caused by the warped board, the reliability and accuracy of the appearance detection result of the to-be-detected board can be ensured.

[0021] In addition, the position of the first camera relative to the to-be-detected board can be adjusted through the adjustment mechanism, so that the first camera has a better viewing distance and height when taking a picture of the to-be-detected board, which can ensure that the first camera takes a three-dimensional image of better quality. Furthermore, the reliability and accuracy of the height data of the to-be-detected board calculated through the image data of the three-dimensional image can be ensured, thereby ensuring the reliability and accuracy of the board warping detection and sorting result of the board warping detection device.

[0022] Applying the board warping detection device of the present utility model to the appearance detection device, since the board warping detection device can sort and remove the unqualified products caused by the warped board in the to-be-detected board, the shipping quality of the PCB board products can be improved. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Wherein:

[0025] Figure 1 It is a schematic diagram of a plate warpage measuring device in an embodiment.

[0026] Figure 2 is Figure 1 an exploded view of the shown plate warpage measuring device.

[0027] Figure 3 is Figure 1 another perspective schematic diagram of the shown plate warpage measuring device.

[0028] Figure 4 is Figure 3 an exploded view of the shown plate warpage measuring device.

[0029] Figure 5 It is a schematic diagram of an appearance detection device in an embodiment.

[0030] Reference numerals in the drawings: 1, plate warpage measuring device; 2, plate to be measured; 3, support platform; 10, first camera; 20, adjustment mechanism; 100, first adjustment component; 110, adjustment plate; 111, first adjustment hole; 112, accommodation groove; 113, second mounting hole; 114, third mounting hole; 120, fixing plate; 121, first fixing hole; 200, second adjustment component; 210, adjustment frame; 211, support body; 212, adjustment base; 201, second adjustment hole; 300, protective cover; 310, opening; 320, first mounting hole. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] An embodiment of the present utility model discloses an appearance detection device, which is used to detect the appearance quality of a to-be-detected board such as a PCB board or a glass board. Please refer to Figure 5 , in one embodiment, the appearance detection device includes a loading device, a conveying device, a detection device, an unloading device, a support platform 3 and a board warpage detection device 1. The detection device and the board warpage detection device 1 are both arranged on the support platform 3. A detection surface for placing the to-be-detected board 2 is formed on the support platform 3. The conveying device is used to convey the to-be-detected board 2. The loading device is used to transfer the to-be-detected board 2 on the conveying device to the detection surface. The unloading device is used to transfer the to-be-detected board 2 on the detection surface back to the conveying device. The detection device is used to capture a two-dimensional image of one side of the to-be-detected board 2, so as to detect the appearance quality of the front side of the to-be-detected board 2.

[0035] In this embodiment, please refer to Figures 1 to 4 , the board warpage detection device 1 is used to detect whether the warpage degree of the to-be-detected board 2 is qualified. The board warpage detection device 1 includes a first camera 10 and an adjustment mechanism 20. The first camera 10 is used to capture a three-dimensional image of the to-be-detected board 2, so that the height data of the to-be-detected board 2 can be calculated through the image data of the three-dimensional image. Furthermore, the warpage degree of the to-be-detected board 2 can be judged through the height data of the to-be-detected board 2. By sorting out and removing the unqualified products caused by warping, the reliability and accuracy of the appearance detection result of the to-be-detected board 2 can be ensured.

[0036] It can be understood that the to-be-detected board 2 is preset with a set height value. The height value obtained by calculation after shooting by the first camera 10 is the actual height value. The actual height value is compared with the set height value, and a height difference is obtained. When the height difference is within the preset range, the warpage degree of the to-be-detected board 2 is qualified. When the height difference exceeds the preset range, the warpage degree of the to-be-detected board 2 is unqualified.

[0037] Further, in this embodiment, the adjustment mechanism 20 includes a first adjustment component 100 and a second adjustment component 200. The first adjustment component 100 is connected to the first camera 10 and is used to adjust the position of the first camera 10 in the first direction. The second adjustment component 200 is connected to the first adjustment component 100 and is used to adjust the positions of the first adjustment component 100 and the first camera 10 in the second direction. The first direction and the second direction are arranged at an angle. By setting like this, the position of the first camera 10 can be adjusted within the two-dimensional plane where the first direction and the second direction are located, and it is also convenient for the board warpage measurement device 1 to be flexibly arranged within the equipment body.

[0038] Specifically, the position of the first camera 10 relative to the to-be-tested board 2 can be adjusted through the adjustment mechanism 20, so that the first camera 10 has a better viewing distance and height when photographing the to-be-tested board 2, which can ensure that the first camera 10 captures a three-dimensional image with better quality, and further ensure the reliability and accuracy of the height data of the to-be-tested board 2 calculated through the image data of the three-dimensional image, thereby ensuring the reliability and accuracy of the board warpage measurement and sorting results of the board warpage measurement device 1. Since the board warpage measurement device 1 can sort and remove unqualified products caused by warped boards in the to-be-tested board 2, the probability of misjudgment of the to-be-tested board 2 can be reduced, the yield of the board products after appearance inspection can be improved, and thus the shipping quality of the board products can be improved.

[0039] It should be noted that different types of to-be-tested boards 2 have different shapes and sizes. After replacing the to-be-tested board 2, the position of the first camera 10 relative to the new to-be-tested board 2 can be adjusted through the adjustment mechanism 20 to ensure that the first camera 10 has a better viewing distance and height relative to the to-be-tested board 2, and the set height value of the to-be-tested board 2 is reconfirmed according to the shape and size of the new to-be-tested board 2.

[0040] In addition, in this embodiment, the first camera 10 collects a three-dimensional image. The algorithm part for calculating the actual height data through this three-dimensional image is the prior art, so the warpage degree of the to-be-tested board 2 is obtained by comparing the actual height data with the set height data.

[0041] In this embodiment, please refer to Figures 1 to 4 , the first adjustment component 100 can have various specific implementation manners.

[0042] In one embodiment, the first adjustment assembly 100 includes an adjustment plate 110, a fixed plate 120, and a first adjustment member. The first camera 10 is fixedly provided on the adjustment plate 110. A first adjustment hole 111 is formed in the adjustment plate 110 and extends along a first direction. A first fixing hole 121 is formed in the fixed plate 120. The first adjustment member passes through any position of the first adjustment hole 111 and is detachably connected to the hole wall of the first fixing hole 121, so as to adjustably mount the adjustment plate 110 on the fixed plate 120, thereby realizing the position adjustment of the first camera 10 in the first direction.

[0043] Further, the first direction is the vertical direction, and thus the viewing height of the first camera 10 relative to the to-be-tested plate member 2 can be adjusted by the first adjustment assembly 100. Of course, the first direction can also be set at an angle not greater than 10 degrees with the vertical direction. Specifically, the first direction can also be set at an angle of 1 degree, 3 degrees, 5 degrees, 7 degrees, 9 degrees, or 10 degrees with the vertical direction.

[0044] Preferably, two first adjustment holes 111 are provided and symmetrically arranged on both sides of the first camera 10. Two groups of first fixing holes 121 are provided and are arranged in one-to-one correspondence with the respective first adjustment holes 111. Each of the first fixing holes 121 in each group is spaced along the first direction, thereby ensuring the stability and reliability of the adjustable setting of the adjustment plate 110 relative to the fixed plate 120.

[0045] Specifically, a third mounting hole 114 is formed in the adjustment plate 110. The mounting member passes through the third mounting hole 114 and is connected to the first camera 10 to fixedly provide the first camera 10 on the adjustment plate 110.

[0046] In another embodiment, the first adjustment assembly 100 includes an adjustment plate 110, a fixed plate 120, and a first adjustment member. The first camera 10 is fixedly provided on the adjustment plate 110. A first adjustment hole 111 is formed in the adjustment plate 110. A plurality of first adjustment holes 111 are provided and are spaced along the first direction. A first fixing hole 121 is formed in the fixed plate 120. The first adjustment member passes through one of the first adjustment holes 111 and is detachably connected to the hole wall of the first fixing hole 121, so as to adjustably mount the adjustment plate 110 on the fixed plate 120, thereby realizing the position adjustment of the first camera 10 in the first direction.

[0047] Of course, in other specific embodiments, the first adjustment component 100 can also be an automated adjustment mechanism 20 such as a motor drive mechanism or a cylinder drive mechanism. For example, the first adjustment component 100 can further include a moving plate, a drive motor, a lead screw and nut mechanism, and a first guide rail. The first camera 10 is fixedly arranged on the moving plate, the moving plate is slidably arranged on the first guide rail, the first guide rail extends along the first direction, and the drive motor is in transmission connection with the moving plate through the lead screw and nut mechanism and is used to drive the moving plate and the first camera 10 to adjust positions in the first direction.

[0048] In this embodiment, please refer to Figures 1 to 4 , the second adjustment component 200 can have various specific embodiments.

[0049] In one embodiment, the second adjustment component 200 includes an adjustment frame 210 and a second adjustment member. The fixed plate 120 is fixedly arranged or adjustably installed on the adjustment frame 210 along the third direction. A second adjustment hole 201 is formed on the adjustment frame 210, and a plurality of second adjustment holes 201 are provided and distributed at intervals along the second direction. The second adjustment member passes through one of the second adjustment holes 201 and is detachably connected to the working surface, so as to adjustably install the adjustment plate 110 on the working surface, thereby realizing the position adjustment of the first camera 10 in the second direction. Among them, the third direction is set at an angle with the first direction and the second direction. Specifically, the first direction is the vertical direction, and both the second direction and the third direction are parallel to the horizontal direction.

[0050] In one embodiment, the first direction is the height direction of the adjustment frame 210, the second direction is the width direction of the adjustment frame 210, and the third direction is the length direction of the adjustment frame 210.

[0051] In this embodiment, a working surface is formed on the upper part of the support platform 3, and the detection surface is located below the working surface.

[0052] Further, the second direction is the horizontal direction, and thus the visual field distance between the first camera 10 and the to-be-tested plate 2 can be adjusted through the second adjustment component 200. Of course, the second direction can also be set at an angle not greater than 10 degrees with the horizontal direction. Specifically, the second direction can also be set at an angle of 1 degree, 3 degrees, 5 degrees, 7 degrees, 9 degrees or 10 degrees with the horizontal direction.

[0053] Preferably, the adjustment frame 210 includes a support body 211 and an adjustment base 212. Two adjustment bases 212 are provided and are respectively arranged at both ends of the support body 211, and a number of second adjustment holes 201 are respectively arranged on each adjustment base 212, so as to ensure the stability and reliability of the adjustable setting of the adjustment frame 210 relative to the working surface.

[0054] Specifically, the adjustment frame 210 is provided with a plurality of third adjustment holes which are spaced along a third direction. The third adjustment member can penetrate through the fixed plate 120 and be connected to one of the third adjustment holes, so as to adjustably mount the fixed plate 120 on the adjustment frame 210 along the third direction.

[0055] In another embodiment, the second adjustment assembly 200 includes an adjustment frame 210 and a second adjustment member. The fixed plate 120 is fixedly arranged or adjustably mounted on the adjustment frame 210 along a third direction. A second adjustment hole 201 is formed in the adjustment frame 210 and extends along a second direction. The second adjustment member penetrates through any position of the second adjustment hole 201 and is detachably connected to the working surface, so as to adjustably mount the adjustment plate 110 on the working surface, thereby realizing the position adjustment of the first camera 10 in the second direction. Among them, the third direction is set at an angle with the first direction and the second direction.

[0056] Specifically, the adjustment frame 210 is provided with a plurality of third adjustment holes which are spaced along a third direction. The third adjustment member can penetrate through the fixed plate 120 and be connected to one of the third adjustment holes, so as to adjustably mount the fixed plate 120 on the adjustment frame 210 along the third direction.

[0057] Certainly, in other specific embodiments, the second adjustment assembly 200 can also be an automated adjustment mechanism 20 such as a motor drive mechanism or a cylinder drive mechanism. For example, the second adjustment assembly 200 can also include a moving frame, a driving motor, a lead screw and nut mechanism, and a second guide rail. The first adjustment assembly 100 is fixedly arranged on the moving frame. The moving frame slides on the second guide rail. The second guide rail extends along the second direction. The driving motor is in transmission connection with the moving plate through the lead screw and nut mechanism and is used to drive the moving frame and the first camera 10 to adjust the position in the second direction.

[0058] Through the specific structural settings of the adjustment mechanism 20 in the above embodiments, the position of the first camera 10 relative to the to-be-tested plate member 2 can be adjusted, so as to photograph the axonometric view and three-dimensional view of the to-be-tested plate member 2.

[0059] In one embodiment, the plate warping measurement device 1 further includes a protective cover 300. The protective cover 300 is fixedly arranged on the adjustment plate 110 and covers the outside of the first camera 10, thereby protecting the first camera 10 and improving the stability of the first camera 10 during operation.

[0060] Specifically, the protective cover 300 is provided with a first mounting hole 320, and the adjustment plate 110 is further provided with a second mounting hole 113. The mounting member penetrates through the first mounting hole 320 and is detachably connected to the hole wall of the second mounting hole 113. Further, the first mounting hole 320 is a strip-shaped hole and extends along the first direction.

[0061] In this embodiment, an opening 310 for exposing the camera in the first camera 10 is provided on the protective cover 300, so as to facilitate the first camera 10 to capture and collect the three-dimensional image of the to-be-tested plate 2.

[0062] Furthermore, the first camera 10 is a 3D laser camera, and the three-dimensional image of the to-be-tested plate 2 can be collected with high quality through the 3D laser camera. The size fluctuation of the to-be-tested plate 2 within 0.6 mm can be detected through the first camera 10.

[0063] Specifically, a receiving groove 112 is formed on the adjusting plate 110 close to the side of the first camera 10, and at least part of the first camera 10 is received and positioned in the receiving groove 112, so as to improve the stability and reliability of the installation of the first camera 10 on the fixing plate 120.

[0064] In one embodiment, the detection device has a second camera, and the second camera is a line scan camera, and the second camera is arranged facing the front of the to-be-tested plate 2. Of course, a plurality of second cameras can also be provided and are respectively arranged facing the front and the back of the to-be-tested plate 2.

[0065] The foregoing disclosure is only a preferred embodiment of the present invention, and of course, it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A device for measuring plate warpage, characterized in that: The board warpage measuring device includes a first camera and an adjustment mechanism, the first camera is used to capture a three-dimensional image of the board to be measured, the adjustment mechanism includes a first adjustment component and a second adjustment component, the first adjustment component is connected to the first camera and is used to adjust the position of the first camera in a first direction, the second adjustment component is connected to the first adjustment component and is used to adjust the positions of the first adjustment component and the first camera in a second direction, and the first direction is set at an angle to the second direction.

2. The board warpage measuring device according to claim 1, characterized in that: The first adjustment assembly includes an adjustment plate, a fixing plate and a first adjustment member, the first camera is fixed to the adjustment plate, a first adjustment hole is provided on the adjustment plate, the first adjustment hole extends along the first direction, a first fixing hole is provided on the fixing plate, the first adjustment member is passed through any position of the first adjustment hole, and is detachably connected to the hole wall of the first fixing hole so that the adjustment plate can be adjustably installed on the fixing plate.

3. The board warpage measuring device according to claim 2, characterized in that: There are two first adjustment holes, which are symmetrically arranged on both sides of the first camera. There are two groups of first fixing holes, which are arranged one-to-one corresponding to the first adjustment holes. The first fixing holes in each group are arranged at intervals along the first direction.

4. The device for measuring board warpage according to claim 1, characterized in that: The first adjustment assembly includes an adjustment plate, a fixing plate and a first adjustment member. The first camera is fixed to the adjustment plate. A first adjustment hole is provided on the adjustment plate. A plurality of first adjustment holes are provided and are spaced apart along the first direction. A first fixing hole is provided on the fixing plate. The first adjustment member is passed through one of the first adjustment holes and is detachably connected to the hole wall of the first fixing hole so that the adjustment plate can be adjustably mounted on the fixing plate.

5. The device for measuring plate warpage according to any one of claims 2 to 4, characterized in that: The second adjustment assembly includes an adjustment frame and a second adjustment member, the fixing plate is fixedly mounted on the adjustment frame or is adjustably mounted along a third direction, a second adjustment hole is opened on the adjustment frame, a plurality of second adjustment holes are provided and are spaced apart along the second direction, the second adjustment member is passed through one of the second adjustment holes and is detachably connected to the working surface so that the adjustment plate can be adjustably mounted on the working surface; The third direction is arranged at an angle to the first direction and the second direction.

6. The device for measuring plate warpage according to claim 5, characterized in that: The adjustment frame comprises a support body and an adjustment base, wherein two adjustment bases are provided and are respectively arranged at two ends of the support body, and a plurality of second adjustment holes are respectively arranged on each of the adjustment bases.

7. The device for measuring plate warpage according to any one of claims 2 to 4, characterized in that: The second adjustment assembly includes an adjustment frame and a second adjustment member, the fixing plate is fixedly mounted on the adjustment frame or is adjustably mounted along a third direction, a second adjustment hole is opened on the adjustment frame, the second adjustment hole extends along the second direction, the second adjustment member is passed through any position of the second adjustment hole, and is detachably connected to the working surface, so that the adjustment plate can be adjustably mounted on the working surface; The third direction is arranged at an angle to the first direction and the second direction.

8. The device for measuring plate warpage according to any one of claims 2 to 4, characterized in that: The plate warping measuring device further comprises a protective cover, which is fixed to the adjustment plate and covers the outside of the first camera; Wherein, the protective cover is provided with an opening for exposing the camera head in the first camera.

9. The device for measuring plate warpage according to any one of claims 2 to 4, characterized in that: The first camera is a 3D laser camera; and / or, A receiving groove is formed on a side of the adjustment plate close to the first camera, and at least a portion of the first camera is received and positioned in the receiving groove.

10. An appearance inspection device, characterized in that: The appearance inspection equipment includes a loading device, a conveying device, a detection device, a unloading device, a support platform and a board warpage detection device according to any one of claims 1 to 9, wherein the detection device and the board warpage detection device are both arranged on the support platform, and a detection surface for placing a board to be tested is formed on the support platform, the conveying device is used to convey the board to be tested, the loading device is used to transfer the board to be tested on the conveying device to the detection surface, the unloading device is used to transfer the board to be tested on the detection surface back to the conveying device, and the detection device is used to capture a two-dimensional image of one side of the board to be tested.

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