Visual measurement device for battery size

Abstract

The utility model provides a battery dimension visual measurement device, and relates to the technical field of visual detection devices. Comprising a rack, a conveying mechanism, a bearing mechanism and a vision measurement mechanism, the bearing mechanism comprises a plurality of transparent quadrilateral bearing boxes, the plurality of bearing boxes are arranged and distributed in the middle of the conveying mechanism along a straight line in the conveying direction, and each bearing box is provided with a telescopic center straightening positioning piece; the vision measurement mechanism comprises two side shooting industrial cameras and a liftable high-angle shooting industrial camera, the two side shooting industrial cameras are arranged on the two sides of the conveying mechanism, and the high-angle shooting industrial camera is arranged over the middle position of the conveying mechanism. According to the utility model, the problem that the accuracy of the obtained external dimension cannot be ensured because the position accuracy of the measured battery relative to the shooting angle of the industrial camera is difficult to control by the conventional vision measurement device, namely, the different measured batteries are difficult to be positioned right below the high-angle shooting camera and are difficult to be straightened is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of visual detection devices, in particular to a battery size visual measurement device. Background Art

[0002] At the end of the battery manufacturing process, the appearance dimensions of the battery need to be measured. The traditional measurement method is completed manually by operators using jigs and calipers, which has the disadvantages of slow measurement speed, poor accuracy, inconvenience in information recording, and high labor costs. Based on this, visual measuring devices have gradually appeared on the market. In most visual measuring devices, a conveying mechanism is generally provided to facilitate the automatic conveying of the battery to be measured. When the battery to be measured is conveyed to the position of the industrial camera, the industrial camera will obtain the appearance photo of the battery to be measured, and then the appearance dimensions will be analyzed by a computer connected to the industrial camera; for example, the Chinese patent with announcement number CN207197448U provides a battery size visual measuring instrument, including a rack, a conveying system, a workbench, a camera size detection system, a computer, etc. However, there is a problem in the actual application of this existing visual measuring device, that is, it is difficult to control the position accuracy of the battery to be measured relative to the shooting angle of the industrial camera, specifically:

[0003] In order to obtain comprehensive and accurate appearance dimensional analysis results, it is necessary to take overhead and side shots of the battery under test, analyze the length and width of the battery under test through overhead images, and analyze the height of the battery under test through side images, and verify the overhead analysis results. When taking images of the battery under test, the ideal state is to be located directly below the overhead camera and to align itself, otherwise the image will be tilted and offset, or even incomplete, which will affect the accuracy of the analyzed appearance dimensions. In most existing visual measurement devices, the transmission mechanism can only realize the basic conveying function and cannot guarantee the position accuracy of the battery under test. Even if measures are taken in the previous material discharge link, there are other problems that make it impossible to achieve better results overall. For example, each battery under test is manually checked and discharged, but the accuracy is not ideal and the labor intensity and labor cost are high. A robot will fix each battery under test in a position directly below the overhead industrial camera. However, unless a complex control structure and control principle are used, it is difficult to ensure that the robot places different batteries under test in a uniform position. Complex control structures and control principles not only require high costs, but may also face a higher risk of errors during operation. Utility Model Content

[0004] The purpose of the utility model is to provide a battery size visual measurement device to solve the problem mentioned in the above background technology that the existing visual measurement device is difficult to control the position accuracy of the measured battery relative to the shooting angle of the industrial camera, that is, it is difficult to make different measured batteries located directly below the overhead camera and align themselves, and thus the accuracy of the obtained appearance size cannot be guaranteed.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A battery size visual measurement device comprises a frame, wherein a conveying mechanism is provided on the frame, and a bearing mechanism and a visual measurement mechanism are provided on the conveying mechanism; the bearing mechanism comprises a plurality of transparent quadrilateral bearing boxes, which are arranged in a straight line along a conveying direction and distributed at a middle position of the conveying mechanism, and a retractable center alignment positioning member is provided on / in the middle of each bearing box; the visual measurement mechanism comprises two side-shooting industrial cameras and a liftable overhead industrial camera, wherein the two side-shooting industrial cameras are arranged on both sides of the conveying mechanism, and the overhead industrial camera is arranged directly above the middle position of the conveying mechanism.

[0007] In the visual measuring device provided by the utility model, by setting a carrying box located in the middle of the conveying mechanism, and setting a center alignment positioning piece on / in the carrying box, after the battery to be tested is placed on / in the carrying box, the battery to be tested can be placed in the middle of the conveying mechanism in an aligned posture with the help of the center alignment positioning piece; and by setting a bird's-eye view industrial camera just above the middle of the conveying mechanism and two side-view industrial cameras on both sides of the conveying mechanism, when the battery to be tested is photographed, the battery to be tested is located just below the bird's-eye view industrial camera and parallel to the side-view industrial camera. Based on this, the visual measuring device itself has the function of calibrating the position of the battery to be tested, so in the previous material discharge link, it is only necessary to put the battery to be tested into the carrying box normally, without spending energy on checking the discharge. In addition, by setting the center alignment positioning piece in a retractable form and setting the overhead industrial camera in a liftable form, the center alignment positioning piece and the overhead industrial camera can be suitable for batteries of different sizes under test; the carrying box is set to be transparent, so that when the battery under test is located in the carrying box, the carrying box is prevented from blocking the battery under test, thereby ensuring that the side-view industrial camera can obtain images normally.

[0008] Furthermore, the center alignment positioning member includes two groups of limit components, each group of limit components includes a plurality of limit components arranged on two opposite inner surfaces of the carrier box; the limit components include a telescopic spring with one end connected to the inner surface of the carrier box; the lengths and stiffness coefficients of the plurality of telescopic springs in each group of limit components are equal.

[0009] By setting two groups of limiting components, the battery under test is positioned at the center of the carrying box in a straightened posture. Specifically, when the battery under test is placed in the carrying box and is in a stationary state, the limiting members on the two opposite inner surfaces of the carrying box will generate elastic forces of equal magnitude but opposite directions due to the balanced force of the battery under test in the horizontal direction. Since several limiting members in each group of limiting components are arranged oppositely (i.e., the number and distribution positions of the limiting members on both sides are symmetrical), and the lengths and stiffness coefficients of several telescopic springs in each group of limiting components are equal, the battery under test will be positioned at the middle position of the carrying box in a straightened posture. In addition, since the limiting member is a telescopic spring, it can be applied to batteries under test of different sizes; however, it should be particularly noted that the different sizes here refer to different sizes within a certain range that can be accommodated by the carrying box. When the battery under test is the smallest size in the certain range, each limiting spring is also in a compressed state, otherwise the battery under test cannot be limited.

[0010] Furthermore, the other end of the telescopic spring is connected to a soft gasket. By providing a soft gasket, the force-bearing area of ​​the battery under test can be increased, making the force more stable and uniform; and the contact between the battery under test and the telescopic spring can be made smoother and softer, which helps to avoid friction and scratches on the surface of the battery under test.

[0011] Furthermore, an opening is provided on the upper surface of the carrying box, and the limiting assembly is arranged on the inner surface of the carrying box below the opening.

[0012] Furthermore, a trigger is provided on the outside of each of the carrier boxes, and the starting power supplies of the two side-shooting industrial cameras and the one overhead industrial camera are electrically connected to the linkage, and the trigger and the linkage are adapted. By providing adapted triggers and linkages, the side-shooting industrial camera and the overhead industrial camera are triggered to take images whenever the carrier box reaches a specified position, thereby making the shooting timing more accurate and avoiding the waste of workload caused by the uninterrupted shooting method of traditional industrial cameras.

[0013] Furthermore, the trigger member includes a reflector, and the linkage member includes a photoelectric switch sensor. When the light reflected by the reflector is detected, the photoelectric switch sensor will (through the existing controller) link the side-shooting industrial camera and the overhead industrial camera to capture the image. It should be particularly noted that the utility model prefers this type of photoelectric proximity switch assembly as a trigger member and linkage member for the purpose of simple setting and low cost; those skilled in the art can also flexibly set an electromagnetic proximity switch assembly, a capacitive proximity switch assembly, a mechanical travel switch assembly, etc. according to actual conditions.

[0014] Furthermore, the visual measurement mechanism further includes a support frame, which includes two parallel vertical plates and a horizontal plate connected between the two vertical plates, and the overhead industrial camera is connected to the horizontal plate through a lifting assembly. The lifting assembly can be selected and set by a person skilled in the art according to actual conditions; it should be particularly noted that the lifting assembly should not block the lens and shooting area of ​​the overhead industrial camera and the side industrial camera.

[0015] Furthermore, the lifting assembly includes a driving motor, a screw lifting structure and a connecting piece. The driving shaft of the driving motor passes through the horizontal plate and is connected to the screw of the screw lifting structure. The nut seat of the screw lifting structure is connected to a connecting piece, and the connecting piece is connected to the overhead industrial camera.

[0016] Furthermore, a support member is movably provided between the two groups of limiter assemblies and is in contact with each limiter, and the support member includes four closed and connected side plates, and a cavity is formed between the four side plates. The support member is provided so that the tested battery can be quickly placed in the carrying box.

[0017] Furthermore, the carrier box is detachably mounted on the conveying mechanism. By providing a detachable mounting method, when the carrier box is damaged or cannot meet the size of the battery to be tested, a new or different sized carrier box can be flexibly replaced; the specific structure for achieving detachability is selected by those skilled in the art according to actual conditions.

[0018] The beneficial effects achieved by the utility model are:

[0019] A battery size visual measurement device is provided. By providing a carrying box and a center alignment positioning piece, when photographing a battery under test, the battery under test can be positioned directly below a bird's-eye industrial camera and parallel to a side-view industrial camera in an aligned posture, thereby obtaining a uniform, clear, and easy-to-process good image, thereby facilitating obtaining a comprehensive and accurate appearance size analysis result. In addition, the center alignment positioning piece is configured in a retractable form and the bird's-eye industrial camera is configured in a liftable form, so that both the center alignment positioning piece and the bird's-eye industrial camera can be applied to batteries under test of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the visual measurement device described in Example 1 of the utility model;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle;

[0023] Figure 4 It is a structural schematic diagram of the position limiting member described in Example 1 of the utility model;

[0024] Figure 5 It is a schematic diagram of the top view of the structure of the carrier box described in Example 1 of the utility model;

[0025] Figure 6 It is a schematic diagram of the state of the tested battery I in the carrying box according to the first embodiment of the utility model;

[0026] Figure 7 It is a schematic diagram of the state of the tested battery II in the carrying box according to the first embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the carrier box described in Example 2 of the utility model;

[0028] Fig. 9 It is a schematic diagram of the top view of the structure of the carrier box described in Example 2 of the utility model;

[0029] In the figure: 1. frame; 2. conveyor belt; 3. side-view industrial camera; 4. linkage; 5. drive motor; 6. support frame; 7. overhead industrial camera; 8. trigger; 9. limiter; 91. fixing part; 92. telescopic spring; 93. soft gasket; 10. carrying box; 11. battery I under test; 12. battery II under test; 13. support; 14. connecting part; 15. screw rod; 16. guide rail. DETAILED DESCRIPTION

[0030] To clearly illustrate the solution in the utility model, further description is given below in conjunction with the accompanying drawings:

[0031] Example 1

[0032] This embodiment provides a battery size visual measurement device, please refer to Figure 1 , including a frame 1, a conveying mechanism is provided on the frame 1, a carrying mechanism and a visual measurement mechanism are provided on the conveying mechanism, specifically: the conveying mechanism adopts a conveyor belt 2; the carrying mechanism includes a plurality of transparent rectangular carrying boxes 10, the plurality of carrying boxes 10 are arranged in a straight line along the conveying direction, and are detachably arranged and distributed in the middle position of the conveying mechanism by adhesive, and each carrying box 10 is provided with a retractable center alignment positioning member; the visual measurement mechanism includes two side-shooting industrial cameras 3 and a liftable overhead industrial camera 7, the two side-shooting industrial cameras 3 are arranged on both sides of the conveying mechanism, and the overhead industrial camera 7 is arranged just above the middle position of the conveying mechanism. Among them:

[0033] Please refer to Figures 3 to 5, an opening is provided on the upper surface of the carrier box 10 (and in this embodiment, the opening coincides with the upper surface, so that the carrier box 10 actually has no upper surface), and a center alignment positioning member is provided on the inner surface of the carrier box 10 below the opening. The center alignment positioning member includes two sets of limiter assemblies; in this embodiment, for the convenience of description, they are respectively recorded as limiter assembly I and limiter assembly II, limiter assembly I includes two limiters 9 arranged oppositely on the two shorter opposite inner surfaces of the carrier box 10, and limiter assembly II includes four limiters 9 arranged oppositely on the two longer opposite inner surfaces of the carrier box 10; each limiter 9 includes a telescopic spring 92 fixedly connected to the inner surface of the carrier box 10 at one end through a fixing member 91, and the other end of the telescopic spring 92 is connected to a soft gasket 93; the length and stiffness coefficient of the two telescopic springs 92 in the limiter assembly I are equal, and the length and stiffness coefficient of the four telescopic springs 92 in the limiter assembly II are equal, so a1 is always = a2, and b1 is always = b2. A triggering member 8 is provided on the outer surface of one end of each carrying box 10 along the conveying direction. The triggering member 8 in this embodiment is specifically a reflective plate, and the plate surface of the reflective plate faces the two sides of the conveying mechanism.

[0034] Please refer to Figure 2 , the visual measurement mechanism also includes a support frame 6, which includes two parallel vertical plates and a horizontal plate connected between the two vertical plates; the overhead industrial camera 7 is connected to the horizontal plate through a lifting assembly, and the overhead industrial camera 7 shoots toward the upper surface of the carrier box 10; the two side industrial cameras 3 are respectively installed on the inner sides of the two vertical plates of the support frame 6, and the two side industrial cameras 3 shoot toward the two outer sides of the carrier box 10. In this embodiment, the lifting assembly includes a drive motor 5, a screw lifting structure and a connecting member 14, the drive shaft of the drive motor 5 passes through the horizontal plate and is connected to the screw 15 of the screw lifting structure, the connecting member 14 is fixedly connected to the nut seat of the screw lifting structure, and the connecting member 14 is fixedly connected to the overhead industrial camera 7; two parallel guide rails 16 are also provided on both sides of the screw 15, one end of the guide rail 16 is fixedly connected to the horizontal plate, and the connecting member 14 is slidably sleeved on the two guide rails 16. A linkage part 4 is provided on one side of the conveying structure located near the support frame 6, and the starting power supplies of two side-shooting industrial cameras 3 and one overhead industrial camera 7 are electrically connected to the linkage part 4. The linkage part 4 in this embodiment is specifically a photoelectric switch sensor, and the photoelectric switch sensor is adapted to the reflector.

[0035] Based on the above structure, the working principle of this embodiment is as follows:

[0036] After the battery to be tested is placed in the carrier box 10, the corresponding limit members 9 on the two sets of opposite inner surfaces of the carrier box 10 will generate elastic forces of equal magnitude but opposite directions, thereby causing the battery to be tested to be positioned in the middle of the carrier box 10 in a straightened posture. Under the action of the conveying mechanism, the carrier box 10 will gradually move to below the overhead industrial camera 7 and between the two side industrial cameras 3; when the photoelectric switch sensor detects a signal, it will automatically link the overhead industrial camera 7 and the side industrial camera 3 to take pictures, thereby capturing a complete and non-tilted image of the battery to be tested. In addition, if Figure 6 and Figure 7 As shown, the carrier box 10 can hold batteries Ⅰ11 and Ⅱ12 of different sizes. When the size of the battery under test is adjusted, the height position of the overhead industrial camera 7 can be adjusted accordingly as needed. Specifically, after the drive motor 5 is started, the screw rod 15 can be driven to rotate, so that the nut seat moves up and down along the screw rod 15 with the connecting piece 14, thereby realizing the lifting and lowering of the overhead industrial camera 7.

[0037] Example 2

[0038] This embodiment provides a battery size visual measurement device, which is different from the first embodiment as follows: Figure 8 and Fig. 9 A support member 13 is movably provided between the two groups of limiting components and is in contact with each limiting member 9. In this embodiment, the support member 13 includes four closed and connected side plates, and a cavity is formed between the four side plates.

[0039] The support member 13 is provided to facilitate the rapid placement of the battery under test into the carrier box 10. Specifically, the limiting member 9 is first compressed to a certain extent with the help of the support member 13, so that when placing the battery under test, it is not necessary to compress the limiting member 9 while placing it, but the battery under test can be directly placed into the cavity of the support member 13, and then the support member 13 can be taken out.

[0040] It should be noted that the parts not described in detail or expanded in the above scheme are all existing technologies, which do not belong to the improvements made by the present invention on the existing technologies, nor do they belong to the protection scope of the technical scheme of the present invention, so they will not be repeated in this article.

[0041] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A battery size visual measurement device, comprising a frame (1), wherein a transmission mechanism is provided on the frame (1), characterized in that: The conveying mechanism is provided with a bearing mechanism and a visual measurement mechanism; the bearing mechanism comprises a plurality of transparent quadrilateral bearing boxes (10), the plurality of bearing boxes (10) are arranged in a straight line along the conveying direction and distributed at the middle position of the conveying mechanism, and a retractable center alignment positioning member is provided on / in the middle of each bearing box (10); the visual measurement mechanism comprises two side-shooting industrial cameras (3) and a liftable overhead industrial camera (7), the two side-shooting industrial cameras (3) are arranged on both sides of the conveying mechanism, and the overhead industrial camera (7) is arranged directly above the middle position of the conveying mechanism.

2. The battery size visual measurement device according to claim 1, characterized in that: The center alignment positioning member comprises two groups of limit assemblies, each group of limit assemblies comprises a plurality of limit assemblies (9) arranged on two opposite inner surfaces of the carrying box (10); the limit assemblies (9) comprise a telescopic spring (92) with one end connected to the inner surface of the carrying box (10); the lengths and stiffness coefficients of the plurality of telescopic springs (92) in each group of limit assemblies are equal.

3. The battery size visual measurement device according to claim 2, characterized in that: The other end of the telescopic spring (92) is connected to a soft gasket (93).

4. The battery size visual measurement device according to claim 2, characterized in that: An opening is provided on the upper surface of the carrying box (10), and the limiting assembly is arranged on the inner surface of the carrying box (10) below the opening.

5. The battery size visual measurement device according to claim 1, characterized in that: A trigger member (8) is provided on the outer side of each carrying box (10); the starting power sources of the two side-viewing industrial cameras (3) and the one overhead-viewing industrial camera (7) are electrically connected to the linkage member (4); and the trigger member (8) is adapted to the linkage member (4).

6. The battery size visual measurement device according to claim 5, characterized in that: The triggering member (8) comprises a reflective plate, and the linkage member (4) comprises a photoelectric switch sensor.

7. The battery size visual measurement device according to claim 1, characterized in that: The visual measurement mechanism also includes a support frame (6), the support frame (6) includes two parallel vertical plates and a horizontal plate connected between the two vertical plates, and the overhead industrial camera (7) is connected to the horizontal plate via a lifting assembly.

8. The battery size visual measurement device according to claim 7, characterized in that: The lifting assembly comprises a driving motor (5), a screw lifting structure and a connecting piece (14); the driving shaft of the driving motor (5) passes through the horizontal plate and is connected to the screw (15) of the screw lifting structure; the connecting piece (14) is connected to the nut seat of the screw lifting structure; and the connecting piece (14) is connected to the overhead industrial camera (7).

9. The battery size visual measurement device according to claim 2, characterized in that: A support member (13) is movably provided between the two groups of limiter assemblies and is in contact with each limiter (9). The support member (13) comprises four closed and connected side plates, and a cavity is formed between the four side plates.

10. The battery size visual measurement device according to claim 1, characterized in that: The carrying box (10) is detachably arranged on the conveying mechanism.

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