An optical detection device based on double-station detection to improve accuracy

Abstract

The present invention relates to the field of optical detection technology. Specifically, it relates to an optical detection device that improves accuracy based on double-station detection. It includes a conveyor belt, and adaptive mechanisms are symmetrically arranged on both sides of the conveyor belt. The adaptive mechanisms adapt to the diameter or width of the workpiece. A detection mechanism is arranged on the top of the adaptive mechanisms. The detection mechanism moves along with the adaptive mechanisms and generates an axial force, enabling the detection mechanism to adapt to the workpiece in a multi-dimensional pose adjustment manner. A regulation mechanism is arranged above the conveyor belt, and two clamping mechanisms are symmetrically arranged below the regulation mechanism. In the present invention, the adaptive mechanisms move to adapt to the workpiece, driving the detection mechanism to move. The detection mechanism generates an axial force, changing the inclination angle of the output end of the detection mechanism, enabling the detection mechanism to adapt to the workpiece in a multi-dimensional pose adjustment manner, ensuring that the pixels at the output end of the detection mechanism are fully utilized, minimizing the shadow or reflection degree of the irregular surface as much as possible, improving the accuracy of edge recognition, and being beneficial to improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and more specifically, to an optical detection device with improved accuracy based on double-station detection. Background Art

[0002] An optical detection device refers to a device that uses optical detection technology to detect the thickness, inner diameter, length, or width of workpieces (such as annular workpieces and square workpieces). Among them, an area array camera image measuring instrument belongs to one type of optical detection device. The area array camera image measuring instrument is equipped with a high-resolution camera and image processing software, performs two-dimensional scanning on the workpiece, and accurately calculates parameters such as length and aperture through pixel analysis.

[0003] Currently, when the existing area array camera image measuring instrument is in use, the following defects exist:

[0004] First, when the existing area array camera image measuring instrument detects workpieces of different shapes, the size of the workpiece changes frequently, while the position of the configured camera is often fixed and cannot be flexibly adjusted according to the diameter or width of different workpieces. As a result, the fixed-position camera may have insufficient pixel utilization due to changes in workpiece size, and may also increase the shadow or reflection degree of irregular surfaces (such as inner holes and threads), reducing the accuracy of edge recognition and the detection accuracy.

[0005] Second, when the existing area array camera image measuring instrument detects workpieces of different shapes, the center of the workpiece often needs to be aligned with the symmetric center and the optical axis center of the light source of the camera. A clamping device is required to clamp the workpiece and drive the workpiece to move to correct the position of the workpiece. However, the clamping device can often only clamp workpieces of specific shapes and cannot adapt to workpieces of different shapes. As a result, it is unable to drive the workpiece to move well to align the center of the workpiece with the symmetric center and the optical axis center of the light source, further reducing the detection accuracy. In view of this, we propose an optical detection device with improved accuracy based on double-station detection. Summary of the Invention

[0006] The purpose of the present invention is to provide an optical detection device with improved accuracy based on double-station detection. It moves by means of an adaptive mechanism to adapt to the workpiece and drives the detection mechanism to move, so that the horizontal position of the output end of the detection mechanism adapts to different workpieces. Then, an axial force is generated by the detection mechanism, enabling the detection mechanism to adapt to different workpieces in a multi-dimensional posture adjustment manner; the adaptive mechanism adapts to the diameter or width of the workpiece, and the workpiece equivalently compresses the adaptive mechanism to make the center line of the workpiece coincide with the center line of the conveyor belt, restricting the horizontal and longitudinal positions of the workpiece. In cooperation with the adjustment mechanism to generate a horizontal lateral force and the clamping mechanism to generate an axial force, the clamping form is changed to clamp and limit workpieces of different shapes.

[0007] To achieve the above object, an optical detection device based on double-station detection for improving accuracy includes a conveyor belt. Adaptive mechanisms are symmetrically arranged on both sides of the conveyor belt. The adaptive mechanisms adapt to the diameter or width of the workpiece, generate horizontal and longitudinal forces to move, and make the center line of the workpiece coincide with the center line of the conveyor belt. A detection mechanism for detecting data such as the inner and outer diameters, length, width value, and thickness of the workpiece is arranged on the top of the adaptive mechanism. The detection mechanism moves horizontally along with the adaptive mechanism to change the horizontal position of the detection mechanism, and the detection mechanism generates an axial force to change its inclination angle in the vertical plane, so that the detection mechanism adapts to the differences in the inner and outer diameters or the length and width value of the workpiece in a multi-dimensional pose adjustment manner. An adjustment mechanism is arranged above the conveyor belt. The adjustment mechanism generates vertical and longitudinal forces and horizontal and transverse forces by itself. Two clamping mechanisms are symmetrically arranged below the adjustment mechanism. The adjustment mechanism generates a vertical and longitudinal force to drive the clamping mechanisms to move vertically, approaching or moving away from the workpiece. And the adjustment mechanism generates a horizontal and transverse force, which cooperates with the clamping mechanisms to generate an axial force to change the clamping form, so that the two clamping mechanisms expand or contract to clamp and limit workpieces of different shapes and drive the workpiece to move, so that the center point of the workpiece coincides with the symmetric center and the optical axis center of the output end of the detection mechanism.

[0008] As a further improvement of this technical solution, the adaptive mechanism includes a fixed plate. One side of the fixed plate close to the conveyor belt is fixedly arranged on one side of the conveyor belt. A plurality of moving rods are inserted and slidably arranged on the side of the fixed plate away from the conveyor belt. The same folded strip is fixedly arranged at one ends of the plurality of moving rods close to the conveyor belt.

[0009] The bottom of the folded strip contacts the surface of the conveyor belt.

[0010] As a further improvement of this technical solution, the same connecting plate is fixedly arranged at the ends of the plurality of moving rods away from the conveyor belt. A plurality of springs are fixedly arranged between the connecting plate and the fixed plate. The plurality of springs are respectively sleeved on the plurality of moving rods.

[0011] As a further improvement of this technical solution, both of the detection mechanisms include U-shaped fixing rods. The bottom ends of the two U-shaped fixing rods are respectively fixedly arranged on the two connecting plates. The same imaging member for two-dimensional scanning of the workpiece is fixedly arranged at the ends of the two U-shaped fixing rods away from the connecting plates.

[0012] As a further improvement of this technical solution, U-shaped mounting frames are fixedly arranged at the ends of the two U-shaped fixing rods away from the connecting plates. A first motor for generating an axial force is fixedly installed on one side of each of the two U-shaped mounting frames. The output ends of the two first motors respectively pass through the two U-shaped mounting frames and are fixedly provided with two detection cameras for photographing and detecting the inner and outer diameters, length, width value, or thickness of the workpiece.

[0013] As a further improvement of this technical solution, both of the clamping mechanisms include fixed blocks. The tops of the two fixed blocks are respectively fixedly arranged on the two output ends of the adjusting mechanism. At both ends of the bottoms of the two fixed blocks, connecting blocks are symmetrically and fixedly arranged. Between adjacent two fixed blocks, a first clamping block for clamping a workpiece is rotatably arranged;

[0014] The outer side of the first clamping block is arc-shaped.

[0015] As a further improvement of this technical solution, on one side of each of the two fixed blocks, a second motor for generating an axial force is fixedly installed. The output ends of the two second motors respectively pass through the two fixed blocks and are fixedly connected to one end of each of the two first clamping blocks;

[0016] At the top end of one side of the first clamping block, a second clamping block for clamping a workpiece is fixedly arranged, and the width of the second clamping block is greater than that of the first clamping block.

[0017] As a further improvement of this technical solution, the adjusting mechanism includes a fixed frame. The two sides of the bottom of the fixed frame are respectively fixedly connected to the surfaces of the two fixing plates. At the top end inside the fixed frame, a cylinder for driving the first clamping block and the second clamping block to move is fixedly arranged;

[0018] The output end of the cylinder and the center point of the workpiece are on the same vertical line.

[0019] As a further improvement of this technical solution, a middle plate is fixedly arranged at the output end of the cylinder. An electric slide rail is fixedly arranged at the bottom of the middle plate. The two output ends of the electric slide rail are respectively fixedly connected to the tops of the two fixed blocks.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In this optical detection device for improving accuracy based on double-station detection, through the adaptive mechanism, it flexibly adapts to the inner and outer diameters or the length and width values of the workpiece and moves horizontally, thereby driving the connected detection mechanism to move, so that the horizontal position of the output end of the detection mechanism flexibly changes to adapt to the inner and outer diameters or the length and width values of workpieces with different shapes. Then, an axial force is generated by the detection mechanism to change the angle of the output end of the detection mechanism on the vertical plane, so that the detection mechanism adapts to the inner and outer diameters or the length and width values of the workpiece in a multi-dimensional pose adjustment manner, ensuring that the pixels at the output end of the detection mechanism are fully utilized, minimizing the shadow or reflection degree of the irregular surface as much as possible, improving the accuracy of edge recognition, and being beneficial to improving the detection accuracy.

[0022] In the optical detection device based on double-station detection to improve accuracy, the adaptive mechanism adapts to the diameter or width of the workpiece, and the workpiece equivalently compresses the adaptive mechanism to align the center line of the workpiece with the center line of the conveyor belt, restricting the horizontal and longitudinal position of the workpiece. The adjustment mechanism generates a vertical longitudinal force to drive the two clamping mechanisms to move up and down along the vertical direction, so that the two clamping mechanisms move away from or close to the workpiece. Then, the adjustment mechanism generates a horizontal lateral force and the clamping mechanism generates an axial force to change the clamping form, clamping and limiting workpieces of different shapes, thereby driving the workpiece to move and aligning the center of the workpiece with the symmetric center and the optical axis center of the light source, which is beneficial to improving the detection accuracy.

[0023] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will make a further detailed description of the present invention with reference to the drawings. Brief Description of the Drawings

[0024] Figure 1 Schematic diagram of the external first perspective structure of the whole of the present invention;

[0025] Figure 2 Schematic diagram of the external second perspective structure of the whole of the present invention;

[0026] Figure 3 Schematic diagram of the connection structure of the adaptive mechanism, detection mechanism, lifting mechanism and clamping mechanism of the present invention;

[0027] Figure 4 Schematic diagram of the operation structure of the adaptive mechanism of the present invention when adapting to the workpiece;

[0028] Figure 5 Schematic diagram of the clamping process of the first clamping block on the workpiece with regular inner wall of the present invention;

[0029] Figure 6 Schematic diagram of the clamping process of the second clamping block on the workpiece with regular inner wall of the present invention;

[0030] Figure 7 Schematic diagram of the clamping process of the second clamping block on the workpiece with irregular outer wall of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the first motor driving the detection camera to rotate in the present invention;

[0032] Figure 9 Schematic diagram of the structure of the second motor driving the first clamping block and the second clamping block to rotate in the present invention;

[0033] Figure 10 For the present invention Figure 3 Enlarged view of the structure at A in

[0034] The meanings of the reference numerals in the figure are as follows:

[0035] 1. Conveyor belt; 2. Adaptive mechanism; 21. Fixed plate; 22. Moving rod; 23. Folded strip; 24. Connecting plate; 25. Spring; 3. Detection mechanism; 31. U-shaped fixing rod; 32. U-shaped mounting bracket; 33. First motor; 34. Detection camera; 4. Adjustment mechanism; 41. Fixed frame; 42. Cylinder; 43. Intermediate plate; 44. Electric slide rail; 5. Clamping mechanism; 51. Fixed block; 52. Connecting block; 53. First clamping block; 54. Second motor; 55. Second clamping block. Specific implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] The position of the detection mechanism configured in the existing optical detection device is often fixed and cannot be flexibly adjusted according to the diameter or width of different workpieces; the clamping mechanism clamps the workpiece and drives the workpiece to move to correct the position of the workpiece. However, the clamping device can often only clamp workpieces with a specific shape and cannot adapt to workpieces with different shapes.

[0038] Therefore, the present invention provides an optical detection device for improving accuracy based on double-station detection. Please refer to Figures 1 - 10, which includes a conveyor belt 1. The conveyor belt 1 is composed of a driving device, a belt, rollers, idlers, a tensioning device, etc. The driving device is used to drive the belt to rotate, and the workpiece is continuously conveyed by relying on friction. Adaptive mechanisms 2 are symmetrically arranged on both sides of the conveyor belt 1. The adaptive mechanisms 2 adapt to the diameter or width of the workpiece, generate horizontal longitudinal forces to move, and make the center line of the workpiece coincide with the center line of the conveyor belt 1. A detection mechanism 3 for detecting data such as the inner and outer diameters, length, width, and thickness of the workpiece is arranged on the top of the adaptive mechanism 2. The detection mechanism 3 moves horizontally along with the adaptive mechanism 2 to change the horizontal position of the detection mechanism 3, and the detection mechanism 3 generates an axial force to change its inclination angle in the vertical plane, so that the detection mechanism 3 adapts to the differences in the inner and outer diameters or the length and width of the workpiece in a multi-dimensional posture adjustment manner. An adjustment mechanism 4 is arranged above the conveyor belt 1. The adjustment mechanism 4 generates vertical longitudinal forces and horizontal lateral forces by itself. Two clamping mechanisms 5 are symmetrically arranged below the adjustment mechanism 4. The vertical longitudinal force generated by the adjustment mechanism 4 drives the clamping mechanisms 5 to move vertically, approaching or moving away from the workpiece. Moreover, the horizontal lateral force generated by the adjustment mechanism 4 cooperates with the clamping mechanisms 5 to generate an axial force to change the clamping form, so that the two clamping mechanisms 5 expand or contract to clamp and limit workpieces of different shapes and drive the workpiece to move, so that the center point of the workpiece coincides with the symmetry center and the optical axis center of the output end of the detection mechanism 3, where:

[0039] As shown in the present invention Figures 1 - 2 shown, considering that the position of the detection mechanism 3 configured in the existing optical detection device is often fixed and cannot be flexibly adjusted according to the diameter or width of different workpieces, so that the pixel utilization rate of the output end of the detection mechanism 3 at a fixed position may be insufficient due to the change of the workpiece size, and it is also possible to increase the shadow or reflection degree of irregular surfaces such as inner holes and threads, reduce the accuracy of edge recognition, and reduce the detection accuracy. Therefore, as Figure 3 shown, the adaptive mechanism 2 flexibly adapts to the inner and outer diameters or the length and width of the workpiece and moves horizontally, thereby driving the connected detection mechanism 3 to move, so that the horizontal position of the output end of the detection mechanism 3 adapts to the inner and outer diameters or the length and width of workpieces of different shapes and changes flexibly. Then, the detection mechanism 3 generates an axial force to change the angle of the output end of the detection mechanism 3 in the vertical plane, so that the detection mechanism 3 adapts to the inner and outer diameters or the length and width of the workpiece in a multi-dimensional posture adjustment manner, ensuring that the pixels at the output end of the detection mechanism 3 are fully utilized, minimizing the shadow or reflection degree of irregular surfaces as much as possible, improving the accuracy of edge recognition, and being beneficial to improving the detection accuracy;

[0040] Moreover, the clamping mechanism 5 clamps the workpiece and drives the workpiece to move to correct the position of the workpiece. However, the clamping device can often only clamp workpieces of specific shapes and cannot adapt to workpieces of different shapes, so that it is impossible to drive the workpiece to move well and align the center of the workpiece with the symmetry center and the optical axis center of the light source, further reducing the detection accuracy. Therefore, asFigure 3 As shown, the adaptive mechanism 2 adapts to the diameter or width of the workpiece. The workpiece equivalently compresses the adaptive mechanism 2, aligning the center line of the workpiece with the center line of the conveyor belt 1, restricting the horizontal and longitudinal position of the workpiece. In cooperation with the adjusting mechanism 4, a vertical longitudinal force is generated to drive the two clamping mechanisms 5 to move up and down along the vertical direction, causing the two clamping mechanisms 5 to move away from or close to the workpiece. Then, in cooperation with the adjusting mechanism 4 to generate a horizontal lateral force and the clamping mechanism 5 to generate an axial force, the clamping form is changed to clamp and limit workpieces of different shapes, thereby driving the workpiece to move and aligning the center of the workpiece with the symmetric center and the optical axis center of the light source, which is beneficial to improving the detection accuracy.

[0041] On this basis, the specific structure is disclosed in detail:

[0042] To enable the adaptive mechanism 2 to adapt to workpieces with different inner and outer diameters or length and width values and limit the workpiece, making the center line of the workpiece coincide with the center line of the conveyor belt 1, it is necessary to know how the two adaptive mechanisms 2 clamp the workpiece to be detected transported by the conveyor belt 1, so the specific structure of the adaptive mechanism 2 needs to be disclosed. Therefore, as Figure 3 shown, the adaptive mechanism 2 includes a fixing plate 21. One side of the fixing plate 21 close to the conveyor belt 1 is fixedly arranged on one side of the conveyor belt 1. A plurality of moving rods 22 are slidably inserted through the side of the fixing plate 21 away from the conveyor belt 1. The same folded strip 23 is fixedly arranged at one ends of the plurality of moving rods 22 close to the conveyor belt 1;

[0043] The bottom of the folded strip 23 contacts the surface of the conveyor belt 1;

[0044] The conveyor belt 1 transports workpieces of different shapes between the two folded strips 23, and is driven by the elastic force of the adaptive mechanism 2 itself to drive the folded strip 23 to adapt to workpieces with different inner and outer diameters or length and width values, and clamp and limit the workpiece, making the center line of the workpiece coincide with the center line of the conveyor belt 1.

[0045] Among them, to enable the folded strip 23 to adapt to workpieces with different inner and outer diameters or length and width values, the adaptive mechanism 2 itself needs to generate an elastic force, so the specific structure of the adaptive mechanism 2 needs to be further disclosed. Therefore, as Figure 3As shown in the figure, a connecting plate 24 is fixedly arranged at one end of each of a plurality of moving rods 22 away from the conveyor belt 1. A plurality of springs 25 are fixedly arranged between the connecting plate 24 and the fixed plate 21. The plurality of springs 25 are respectively sleeved on the plurality of moving rods 22. The workpiece is conveyed between the two folded strips 23 by the conveyor belt 1. The workpiece presses the folded strips 23. As the workpiece continuously moves and enters between the two folded strips 23, it drives the two folded strips 23 to move away from each other in the horizontal direction, thereby driving the springs 25 to elongate and generate an elastic force. The elastic force acts on the connecting plate 24 and the moving rods 22, and then acts on the folded strips 23, so that the folded strips 23 have a certain elastic acting force on the workpiece to limit the workpiece, making the center line of the workpiece coincide with the center line of the conveyor belt, and enabling the folded strips 23 to adapt to workpieces with different inner and outer diameters or length and width values.

[0046] Considering that the folded strips 23 move adaptively as workpieces with different inner and outer diameters or length and width values enter between the two folded strips 23, and drive the detection mechanism 3 to adapt to workpieces with different inner and outer diameters or length and width values, changing the horizontal and longitudinal positions of the output end of the detection mechanism 3, it is necessary to disclose the specific structure of the detection mechanism 3. Therefore, as Figure 3 shown in the figure, both of the two detection mechanisms 3 include U-shaped fixing rods 31. The bottom ends of the two U-shaped fixing rods 31 are respectively fixedly arranged on the two connecting plates 24. At one end of each of the two U-shaped fixing rods 31 away from the connecting plate 24, an imaging member for two-dimensional scanning of the workpiece is fixedly arranged. As the workpiece continuously enters between the two folded strips 23, it drives the folded strips 23 to move, thereby driving the moving rods 22 and the connecting plates 24 to move, and further driving the U-shaped fixing rods 31 and the imaging members to move, so that the horizontal and longitudinal positions of the imaging members can flexibly change and adjust with workpieces having different inner and outer diameters or length and width values.

[0047] Considering that it is necessary for the imaging member to generate an axial force by itself to drive the output end of the detection mechanism 3 to rotate, so as to change the inclination angle of the output end of the detection mechanism 3 in the vertical plane and further adapt to workpieces with different inner and outer diameters or length and width values, it is necessary to continue to disclose the specific structure of the imaging member. Therefore, as Figure 3As shown in the figure, U-shaped mounting brackets 32 are fixedly arranged at the ends of two U-shaped fixing rods 31 away from the connecting plate 24. On one side of each of the two U-shaped mounting brackets 32, a first motor 33 for generating an axial force is fixedly installed. The output ends of the two first motors 33 respectively pass through the two U-shaped mounting brackets 32 and are fixedly provided with two detection cameras 34 for photographing and detecting the inner and outer diameters, length, width values or thickness of the workpiece. The detection camera 34 is a area array camera. The structure of the area array camera includes an image sensor (CCD / CMOS), an optical lens, and a signal processing module. Its working principle is that a two-dimensional photosensitive matrix captures optical signals and converts them into digital images. The detection camera 34 is externally connected to an image processing device to analyze and calculate the photographed pictures. This is the prior art and will not be elaborated here. The detection camera 34 is the output end of the detection mechanism 3. By rotating the first motor 33 to generate an axial force, as Figure 8 shown in the figure, it drives the detection camera 34 to rotate in the vertical plane, changing the tilt angle of the detection camera 34 to further adapt to workpieces with different inner and outer diameters or length and width values. Moreover, the two detection cameras 34 are respectively arranged on both sides of the workpiece, and in a double-station photographing mode, various data of the workpiece are photographed and detected at two positions.

[0048] Considering that the clamping mechanism 5 is required to clamp annular or frame-shaped workpieces with regular inner wall shapes and adjust the position of the workpiece so that the center point of the workpiece coincides with the symmetry center and the optical axis center of the light source of the detection camera 34, it is necessary to disclose the specific structure of the clamping mechanism 5. Therefore, as Figure 3 and Figure 10 shown in the figure, both of the two clamping mechanisms 5 include fixed blocks 51. The tops of the two fixed blocks 51 are respectively fixedly arranged on the two output ends of the adjusting mechanism 4. At both ends of the bottoms of the two fixed blocks 51, connecting blocks 52 are symmetrically and fixedly arranged. Between adjacent two fixed blocks 51, a first clamping block 53 for clamping the workpiece is rotatably arranged;

[0049] The outer side of the first clamping block 53 is set to be arc-shaped. The arc-shaped outer side makes the contact area larger when the outer side of the first clamping block 53 contacts the workpiece with a circular inner wall, and the workpiece with a circular inner wall will be clamped more stably;

[0050] By generating a horizontal lateral force through the adjusting mechanism 4, it drives the two fixed blocks 51 to move away from each other, and then drives the two first clamping blocks 53 to expand outward to clamp workpieces with regular inner wall shapes, such as the inner wall of the workpiece being circular or square, or by generating a horizontal lateral force through the adjusting mechanism 4, driving the two fixed blocks 51 to approach each other to clamp workpieces with regular outer walls. As Figure 5 shown in the figure, for example, the outer wall of the workpiece is circular or square, so that the center of the workpiece can coincide with the symmetry center and the optical axis center of the light source of the detection camera 34 to improve the detection accuracy of the detection camera 34.

[0051] Among them, if the workpiece has an inner wall and an outer wall, but the shapes of both the inner wall and the outer wall are irregular, or the workpiece is a solid workpiece, when the clamping mechanism 5 clamps a workpiece with irregular shapes of both the inner wall and the outer wall or a solid workpiece, it is necessary to further disclose the specific structure of the clamping mechanism 5. Therefore, as Figure 3 shown, on one side of each of two fixing blocks 51, a second motor 54 that generates an axial force is fixedly installed, and the output ends of the two second motors 54 respectively pass through the two fixing blocks 51 and are fixedly connected to one ends of two first clamping blocks 53;

[0052] At the top end on one side of the first clamping block 53, a second clamping block 55 for clamping the workpiece is fixedly arranged, and the width of the second clamping block 55 is greater than the width of the first clamping block 53;

[0053] The small width of the first clamping block 53 is convenient for clamping a workpiece with a regular inner wall or outer wall shape. If the inner wall and outer wall of the workpiece are both irregular, or the workpiece is a solid workpiece with an irregular outer wall, when the first clamping block 53 with a small width clamps the workpiece, after the first clamping block 53 contacts the workpiece, it is not easy to apply a clamping force to the workpiece. At this time, a second clamping block 55 with a large width is required. The second motor 54 is started to generate an axial force. As Figure 9 shown, drive the first clamping block 53 and the second clamping block 55 to rotate clockwise by 90 degrees, so that the second clamping block 55 replaces the position of the first clamping block 53, and drive the two second clamping blocks 55 to approach or move away from each other by using the adjusting mechanism 4, and clamp the workpiece with an irregular inner wall or outer wall shape respectively. As Figure 6 and Figure 7 shown, the width of the second clamping block 55 is greater than that of the first clamping block 53, so that the contact area between the second clamping block 55 and the workpiece with an irregular inner wall or outer wall shape is larger, and the second clamping block 55 can clamp the workpiece more stably, so that the center point of the workpiece coincides with the symmetry center and the optical axis center of the light source of the detection camera 34, so as to improve the detection accuracy of the detection camera 34.

[0054] Among them, to make the adjusting mechanism 4 operate to drive the first clamping block 53 and the second clamping block 55 to move close to or away from the workpiece along the vertical direction, it is necessary to disclose the specific structure of the adjusting mechanism 4. Therefore, as Figure 3 shown, the adjusting mechanism 4 includes a fixing frame 41. Both sides of the bottom of the fixing frame 41 are fixedly connected to the surfaces of two fixing plates 21, and at the top end inside the fixing frame 41, a cylinder 42 for driving the first clamping block 53 and the second clamping block 55 to move is fixedly arranged;

[0055] The output end of the cylinder 42 is on the same vertical line as the center point of the workpiece;

[0056] By extending and shortening the output end of the air cylinder 42, the fixed block 51 is driven to move along the vertical direction, and then the first clamping block 53, the second motor 54, and the second clamping block 55 are driven to move along the vertical direction, so that the first clamping block 53 and the second clamping block 55 approach the workpiece, and the two first clamping blocks 53 or the second clamping blocks 55 move to the inside or outside of the workpiece at the same time, so as to clamp and limit the workpiece, or the first clamping block 53 and the second clamping block 55 move away from the workpiece, so as to prevent the first clamping block 53 and the second clamping block 55 from blocking the detection camera 34 from taking pictures and videos of the workpiece.

[0057] Among them, to make the adjusting mechanism 4 operate to drive the two first clamping blocks 53 or the two second clamping blocks 55 to approach or move away from each other to clamp the workpiece, the specific structure of the adjusting mechanism 4 needs to be further disclosed. Therefore, as Figure 3 shown, a middle plate 43 is fixedly arranged at the output end of the air cylinder 42, and an electric slide rail 44 is fixedly arranged at the bottom of the middle plate 43. The two output ends of the electric slide rail 44 are respectively fixedly connected to the tops of the two fixed blocks 51. The electric slide rail 44 includes a motor, a bidirectional lead screw, and two sliders. The motor rotates to generate an axial force, which drives the bidirectional lead screw to rotate, and then drives the two sliders to approach or move away from each other, so that the axial force is converted into a horizontal force. The two sliders constitute the two output ends of the electric slide rail 44. By the operation of the electric slide rail 44 itself, the two fixed blocks 51 are driven to approach or move away from each other, and then the two first clamping blocks 53 or the two second clamping blocks 55 are driven to approach or move away from each other. In this way, the workpiece can be clamped and the workpiece can be driven to move, so that the center point of the workpiece is on the same vertical line as the output end of the air cylinder 42, and the center point of the workpiece coincides with the symmetry center and the optical axis center of the light source of the detection camera 34, so as to improve the detection accuracy of the detection camera 34.

[0058] In summary, the overall working principle of the present invention is as follows:

[0059] When it is necessary to use this optical detection device to detect workpieces with different inner and outer diameters or length and width values, workpieces of different shapes are continuously conveyed onto the conveyor belt 1. The conveyor belt 1 rotates continuously and intermittently conveys the workpieces between the two folded strips 23. The workpiece squeezes the folded strips 23, and the workpiece moves continuously with the conveyor belt 1 and enters between the two folded strips 23, driving the two folded strips 23 to move away from each other along the horizontal direction, and then driving the spring 25 to stretch, generating an elastic force. The elastic force acts on the connecting plate 24 and the moving rod 22, and then acts on the folded strips 23, so that the folded strips 23 have a certain elastic acting force on the workpiece to limit the workpiece, so that the center line of the workpiece coincides with the center line of the conveyor belt 1;

[0060] The workpieces continuously enter between the two folded strips 23, driving the movement of the folded strips 23, and then driving the movement of the moving rod 22 and the connecting plate 24, and further driving the U-shaped fixing rod 31 and the detection camera 34 to move horizontally, so that the horizontal longitudinal position of the detection camera 34 can be flexibly changed and adjusted according to workpieces with different inner and outer diameters or length and width values. Then, start the first motor 33 to rotate it to generate an axial force, driving the detection camera 34 to rotate in the vertical plane and changing the tilt angle of the detection camera 34 to further adapt to workpieces with different inner and outer diameters or length and width values;

[0061] Start the cylinder 42 to extend its output end, driving the fixing block 51 to move vertically, and then driving the first clamping block 53, the second motor 54 and the second clamping block 55 to move vertically, so that the first clamping block 53 and the second clamping block 55 approach the workpiece, and the two first clamping blocks 53 or the second clamping blocks 55 move to the inside or outside of the workpiece at the same time. Then, start the electric slide rail 44 to drive the two fixing blocks 51 to approach or move away from each other, and further drive the two first clamping blocks 53 or the two second clamping blocks 55 to approach or move away from each other to clamp the workpiece, so that the center point of the workpiece coincides with the symmetry center and the optical axis center of the light source of the detection camera 34;

[0062] Then, start the detection cameras 34 at the two symmetric workstations to take pictures of the workpiece, and transmit the taken pictures to the image processing device for analysis and processing to calculate data such as the inner and outer diameters, length, width and thickness of the workpiece. Repeat this process to detect data such as the inner and outer diameters, length, width and thickness of each workpiece on the conveyor belt 1.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical detection device for improving accuracy based on double-station detection, which includes a conveyor belt (1), and is characterized in that: On both sides of the conveyor belt (1), an adaptive mechanism (2) is symmetrically arranged. The adaptive mechanism (2) moves adaptively due to the horizontal and longitudinal forces generated by the workpiece, and makes the center line of the workpiece coincide with the center line of the conveyor belt (1). On the top of the adaptive mechanism (2), a detection mechanism (3) for detecting the inner and outer diameters, length, width and thickness data of the workpiece is arranged. The detection mechanism (3) moves horizontally along with the adaptive mechanism (2) to change the horizontal position of the detection mechanism (3). And the detection mechanism (3) generates an axial force to adapt to the differences in the inner and outer diameters, length and width values of the workpiece in a multi-dimensional posture adjustment manner. Above the conveyor belt (1), an adjustment mechanism (4) is arranged. Two clamping mechanisms (5) are symmetrically arranged below the adjustment mechanism (4). The adjustment mechanism (4) generates a vertical and longitudinal force to drive the clamping mechanisms (5) to move vertically, and generates a horizontal and transverse force to cooperate with the clamping mechanisms (5) to generate an axial force to change the clamping form. The adaptive mechanism (2) includes a fixing plate (21). One side of the fixing plate (21) close to the conveyor belt (1) is fixedly arranged on one side of the conveyor belt (1). On the side of the fixing plate (21) far from the conveyor belt (1), a plurality of moving rods (22) are inserted and slidably arranged. One end of the plurality of moving rods (22) close to the conveyor belt (1) is fixedly provided with the same folded strip (23). The bottom of the folded strip (23) is in contact with the surface of the conveyor belt (1). One end of the plurality of moving rods (22) far from the conveyor belt (1) is fixedly provided with the same connecting plate (24). A plurality of springs (25) are fixedly arranged between the connecting plate (24) and the fixing plate (21). The plurality of springs (25) are respectively sleeved on the plurality of moving rods (22). Both of the two detection mechanisms (3) include U-shaped fixing rods (31). The bottom ends of the two U-shaped fixing rods (31) are respectively fixedly arranged on the two connecting plates (24). One end of the two U-shaped fixing rods (31) far from the connecting plates (24) is fixedly provided with a camera for two-dimensional scanning of the workpiece.

2. The optical detection device based on double-station detection for improving accuracy according to claim 1, characterized in that: One end of the two U-shaped fixing rods (31) far from the connecting plates (24) is fixedly provided with a U-shaped mounting frame (32). On one side of each of the two U-shaped mounting frames (32), a first motor (33) for generating an axial force is fixedly installed. The output ends of the two first motors (33) respectively pass through the two U-shaped mounting frames (32) and are fixedly provided with two detection cameras (34) for photographing and detecting the inner and outer diameters, length, width or thickness of the workpiece.

3. The optical detection device based on double-station detection for improving accuracy according to claim 1, wherein: Both of the two clamping mechanisms (5) include fixing blocks (51). The tops of the two fixing blocks (51) are respectively fixedly arranged on the two output ends of the adjustment mechanism (4). At both ends of the bottom of the two fixing blocks (51), connecting blocks (52) are symmetrically and fixedly arranged. Between adjacent two fixing blocks (51), a first clamping block (53) for clamping the workpiece is rotatably arranged. The outer side of the first clamping block (53) is arc-shaped.

4. The optical detection device based on double-station detection for improving accuracy according to claim 3, characterized in that: On one side of each of the two fixed blocks (51), a second motor (54) that generates an axial force is fixedly installed. The output ends of the two second motors (54) respectively pass through the two fixed blocks (51) and are fixedly connected to one ends of the two first clamping blocks (53). On the top of one side of the first clamping block (53), a second clamping block (55) for clamping the workpiece is fixedly arranged, and the width of the second clamping block (55) is greater than the width of the first clamping block (53).

5. The optical detection device based on double-station detection for improving accuracy according to claim 4, wherein: The adjusting mechanism (4) includes a fixed frame (41). Both sides of the bottom of the fixed frame (41) are fixedly connected to the surfaces of the two fixing plates (21). At the inner top end of the fixed frame (41), a cylinder (42) for driving the first clamping block (53) and the second clamping block (55) to move is fixedly arranged. The output end of the cylinder (42) is on the same vertical line as the center point of the workpiece.

6. The optical detection device based on double-station detection for improving accuracy according to claim 5, wherein: The output end of the cylinder (42) is fixedly provided with an intermediate plate (43). At the bottom of the intermediate plate (43), an electric slide rail (44) is fixedly arranged. The two output ends of the electric slide rail (44) are respectively fixedly connected to the tops of the two fixed blocks (51).

Images