Optical detection device for improving precision based on double-station detection

Abstract

The invention relates to the technical field of optical detection, in particular to an optical detection device for improving precision based on double-station detection, which comprises a conveying belt, self-adaptive mechanisms are symmetrically arranged on two sides of the conveying belt, the self-adaptive mechanisms are self-adaptive to the diameter or width of a workpiece, and a detection mechanism is arranged at the top of each self-adaptive mechanism. The detection mechanism moves along with the self-adaption mechanism and generates axial force, so that the detection mechanism adapts to workpieces in a multi-dimensional posture adjusting mode, an adjusting mechanism is arranged above the conveying belt, and two clamping mechanisms are symmetrically arranged below the adjusting mechanism. The self-adaptive mechanism adapts to the workpiece to move and drives the detection mechanism to move, the detection mechanism generates axial force and changes the inclination angle of the output end of the detection mechanism, so that the detection mechanism adapts to the workpiece in a multi-dimensional posture adjusting mode, and it is guaranteed that pixels of the output end of the detection mechanism are fully utilized; the shadow or reflection degree of the irregular surface is reduced as much as possible, the edge identification accuracy is improved, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and 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 ring-shaped 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: First, when the existing area array camera image measuring instrument detects workpieces of different shapes, the workpiece size 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 camera at a fixed position may have insufficient pixel utilization due to the change 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. 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 symmetry 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 symmetry 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

[0004] The purpose of the present invention is to provide an optical detection device with improved accuracy based on double-station detection. It moves through 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, the detection mechanism generates an axial force, 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. Cooperating with the adjustment mechanism to generate a horizontal lateral force and the clamping mechanism to generate an axial force, changing the clamping form, and clamping and limiting workpieces of different shapes.

[0005] To achieve the above object, an optical detection device based on double-station detection to improve 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, 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 of the workpiece in a multi-dimensional posture adjustment manner. A regulating mechanism is arranged above the conveyor belt. The regulating mechanism generates vertical and longitudinal forces and horizontal and transverse forces by itself. Two clamping mechanisms are symmetrically arranged below the regulating mechanism. The regulating mechanism generates a vertical and longitudinal force to drive the clamping mechanisms to move vertically, approaching or away from the workpiece. And the regulating 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.

[0006] 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 folding strip is fixedly arranged at one ends of the plurality of moving rods close to the conveyor belt. The bottom of the folding strip contacts the surface of the conveyor belt.

[0007] 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.

[0008] 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. At the ends of the two U-shaped fixing rods away from the connecting plates, imaging parts for two-dimensional scanning of the workpiece are fixedly arranged.

[0009] 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, or thickness of the workpiece.

[0010] As a further improvement of the 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; The outer side of the first clamping block is arc-shaped.

[0011] As a further improvement of the 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; 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.

[0012] As a further improvement of the 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 fixed 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; The output end of the cylinder and the center point of the workpiece are on the same vertical line.

[0013] As a further improvement of the 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.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the optical detection device based on double-station detection for improving precision, 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 posture 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, and improving the accuracy of edge recognition, which is beneficial to improving the detection precision.

[0015] 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, so that the center line of the workpiece coincides 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.

[0016] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the first external perspective of the whole of the present invention; Figure 2 is a schematic structural diagram of the second external perspective of the whole of the present invention; Figure 3 is a schematic connection structural diagram of the adaptive mechanism, the detection mechanism, the lifting mechanism and the clamping mechanism of the present invention; Figure 4 is a schematic operation structural diagram of the adaptive mechanism of the present invention when adapting to the workpiece; Figure 5 is a schematic clamping process diagram of the first clamping block for a workpiece with a regular inner wall of the present invention; Figure 6 is a schematic clamping process diagram of the second clamping block for a workpiece with a regular inner wall of the present invention; Figure 7 is a schematic clamping process diagram of the second clamping block for a workpiece with an irregular outer wall of the present invention; Figure 8 is a schematic structural diagram of the first motor driving the detection camera to rotate of the present invention; Figure 9 is a schematic structural diagram of the second motor driving the first clamping block and the second clamping block to rotate of the present invention; Figure 10 For the present invention Figure 3 is an enlarged view of the structure at A in the present invention.

[0018] The meanings of the various reference numerals in the drawings are as follows: 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. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] 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.

[0021] 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 drives 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, move by generating horizontal and longitudinal forces, 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 values 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 and longitudinal forces and horizontal and transverse forces by itself. 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, approaching or moving away from the workpiece, and the adjustment mechanism 4 generates a horizontal and transverse force to cooperate with the clamping mechanisms 5 to generate an axial force, changing the clamping form, so that the two clamping mechanisms 5 expand or contract to clamp and limit workpieces with 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: As shown in the present invention Figures 1 - 2 Considering that the position of the detection mechanism 3 in the existing optical detection device configuration is often fixed and cannot be flexibly adjusted according to the diameter or width of different workpieces, the output end of the detection mechanism 3 at a fixed position may result in insufficient pixel utilization due to changes in the workpiece size, and it 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 precision. Therefore, as Figure 3 shown, the adaptive mechanism 2 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 3 to move, so that the horizontal position of the output end of the detection mechanism 3 flexibly changes according to the inner and outer diameters or the length and width values of different-shaped workpieces. Then, the detection mechanism 3 generates an axial force to change the angle of the output end of the detection mechanism 3 on the vertical plane, enabling the detection mechanism 3 to adapt 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 3 are fully utilized, minimizing the shadow or reflection degree of the irregular surface, improving the accuracy of edge recognition, and being beneficial to improving the detection precision; 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 a specific shape and cannot adapt to workpieces of different shapes, so it is unable 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 precision. Therefore, as Figure 3 shown, the adaptive mechanism 2 adapts to the diameter or width of the workpiece. The workpiece equivalently compresses the adaptive mechanism 2 to make the center line of the workpiece coincide with the center line of the conveyor belt 1, restricting the horizontal and longitudinal position of the workpiece. Cooperating with the adjustment mechanism 4 to generate a vertical longitudinal force, driving the two clamping mechanisms 5 to move up and down along the vertical direction, so that the two clamping mechanisms 5 move away from or close to the workpiece. Then, cooperating with the adjustment mechanism 4 to generate a horizontal lateral force and the clamping mechanism 5 to generate 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 symmetry center and the optical axis center of the light source, which is beneficial to improving the detection precision.

[0022] On the above basis, the specific structure is disclosed in detail: 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 to make 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, and the specific structure of the adaptive mechanism 2 needs to be disclosed. Therefore, as Figure 3As shown in the figure, the adaptive mechanism 2 includes a fixed plate 21. One side of the fixed 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 arranged through the side of the fixed plate 21 far 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; The bottom of the folded strip 23 contacts the surface of the conveyor belt 1; The workpieces of different shapes are conveyed between the two folded strips 23 by the conveyor belt 1, and driven by the elastic force of the adaptive mechanism 2 itself, the folded strip 23 is driven to adapt to the workpieces with different inner and outer diameters or length and width values, and the workpieces are clamped and limited, so that the center line of the workpieces coincides with the center line of the conveyor belt 1.

[0023] Among them, to make the folded strip 23 adapt to the workpieces with different inner and outer diameters or length and width values, the adaptive mechanism 2 itself needs to generate elastic force, so it is necessary to further disclose the specific structure of the adaptive mechanism 2. Therefore, as Figure 3 shown, the same connecting plate 24 is fixedly arranged at the ends of the plurality of moving rods 22 far 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 workpieces are conveyed between the two folded strips 23 by the conveyor belt 1. The workpieces squeeze the folded strip 23, and the workpieces move continuously and enter between the two folded strips 23, driving the two folded strips 23 to move away from each other horizontally, thereby driving the springs 25 to elongate and generate elastic force. The elastic force acts on the connecting plate 24 and the moving rods 22, and then acts on the folded strip 23, so that the folded strip 23 has a certain elastic acting force on the workpieces, limits the workpieces, makes the center line of the workpieces coincide with the center line of the conveyor belt, and enables the folded strip 23 to adapt to the workpieces with different inner and outer diameters or length and width values.

[0024] Considering that the folded strip 23 moves adaptively as the workpieces with different inner and outer diameters or length and width values enter between the two folded strips 23, and drives the detection mechanism 3 to adapt to the workpieces with different inner and outer diameters or length and width values, changing the horizontal and vertical 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, the two detection mechanisms 3 both 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. A camera for two-dimensional scanning of the workpieces is fixedly arranged at the ends of the two U-shaped fixing rods 31 far from the connecting plates 24. As the workpieces continuously enter between the two folded strips 23, the folded strip 23 is driven 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 cameras to move, so that the horizontal and vertical positions of the cameras can change and adjust flexibly with the workpieces with different inner and outer diameters or length and width values.

[0025] Considering that the imaging component needs 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 further disclose the specific structure of the imaging component. Therefore, as Figure 3 shown, at the ends of the two U-shaped fixing rods 31 away from the connecting plate 24, U-shaped mounting brackets 32 are fixedly arranged. 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 and 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. The 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, it drives the detection camera 34 to rotate in the vertical plane, changing the inclination angle of the detection camera 34 to further adapt to workpieces with different inner and outer diameters or length and width values. And 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.

[0026] Considering that the clamping mechanism 5 needs 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, the two clamping mechanisms 5 each include a fixed block 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; 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; 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 to clamp workpieces with regular inner wall shapes, such as the inner wall of the workpiece is circular or square, or by generating a horizontal lateral force through the adjusting mechanism 4, it drives the two fixed blocks 51 to move closer to clamp workpieces with regular outer walls, as Figure 5As shown, 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, thereby improving the detection accuracy of the detection camera 34.

[0027] 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 inner and outer wall shapes or a solid workpiece, the specific structure of the clamping mechanism 5 needs to be further disclosed. Therefore, as Figure 3 shown, on one side of each of the 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 end of the two first clamping blocks 53; At 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; 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 and outer walls 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, the 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 use the adjusting mechanism 4 to drive the two second clamping blocks 55 to approach or move away from each other, respectively clamping workpieces with irregular inner or outer wall shapes. 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 when the second clamping block 55 contacts a workpiece with an irregular inner or outer wall shape, the contact area is larger, and the second clamping block 55 can clamp the workpiece more stably, making the center point of the workpiece coincide with the symmetry center and the optical axis center of the light source of the detection camera 34, thereby improving the detection accuracy of the detection camera 34.

[0028] Among them, to make the adjusting mechanism 4 operate to drive the first clamping block 53 and the second clamping block 55 to move closer to or away from the workpiece along the vertical direction, the specific structure of the adjusting mechanism 4 needs to be disclosed. Therefore, as Figure 3 shown, the adjusting mechanism 4 includes a fixing frame 41. The two sides of the bottom of the fixing frame 41 are respectively fixedly connected to the surfaces of the two fixing plates 21. 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; The output end of the cylinder 42 is on the same vertical line as the center point of the workpiece; By extending and shortening the output end of the 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 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.

[0029] 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 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 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 to improve the detection accuracy of the detection camera 34.

[0030] In summary, the overall working principle of the present invention is as follows: 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 and make the center line of the workpiece coincide with the center line of the conveyor belt 1; Workpieces continuously enter between two folded strips 23, driving the movement of the folded strips 23, and further driving the movement of the moving rod 22 and the connecting plate 24, and then 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 flexibly change and adjust according to workpieces with different inner and outer diameters or length and width values. Then, start the first motor 33 to make it rotate 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; Start the cylinder 42 to make its output end extend, driving the fixing block 51 to move vertically, and further 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 inner or outer side 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; Then, start the detection cameras 34 at two symmetrical 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.

[0031] 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 of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical detection device for improving accuracy based on dual-station detection, comprising a conveyor belt (1), characterized in that: The conveyor belt (1) is symmetrically provided with adaptive mechanisms (2), the adaptive mechanisms (2) adapt to the horizontal longitudinal force generated by the workpiece 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 inner and outer diameters, length, width and thickness data of a 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); The detection mechanism (3) generates an axial force to adapt to the differences in the inner and outer diameters, length and width of the workpiece in a multi-dimensional posture adjustment manner. An adjustment mechanism (4) is arranged above the conveyor belt (1), and two clamping mechanisms (5) are symmetrically arranged below the adjustment mechanism (4). The adjustment mechanism (4) generates a vertical longitudinal force to drive the clamping mechanism (5) to move vertically, and generates a horizontal transverse force to cooperate with the clamping mechanism (5) to generate an axial force, thereby changing the clamping form.

2. The optical detection device for improving accuracy based on dual-station detection according to claim 1, characterized in that: The adaptive mechanism (2) comprises a fixed plate (21), wherein a side of the fixed plate (21) close to the conveyor belt (1) is fixedly arranged on a side of the conveyor belt (1), and a side of the fixed plate (21) away from the conveyor belt (1) is provided with a plurality of movable rods (22) which are inserted and slidably arranged thereon, and a same folding strip (23) is fixedly arranged at one end of the plurality of movable rods (22) close to the conveyor belt (1); The bottom of the folding strip (23) contacts the surface of the conveyor belt (1).

3. The optical detection device for improving accuracy based on dual-station detection according to claim 2, characterized in that: The ends of the plurality of moving rods (22) away from the conveyor belt (1) are all fixedly provided with a same connecting plate (24), a plurality of springs (25) are fixedly provided between the connecting plate (24) and the fixed plate (21), and the plurality of springs (25) are respectively mounted on the plurality of moving rods (22).

4. The optical detection device for improving accuracy based on dual-station detection according to claim 3 is characterized in that: The two detection mechanisms (3) each comprise a U-shaped fixing rod (31), the bottom ends of the two U-shaped fixing rods (31) being fixedly arranged on the two connecting plates (24) respectively, and a camera for performing two-dimensional scanning of a workpiece being fixedly arranged on one end of the two U-shaped fixing rods (31) away from the connecting plates (24).

5. The optical detection device for improving accuracy based on dual-station detection according to claim 4, characterized in that: A U-shaped mounting frame (32) is fixedly provided at one end of the two U-shaped fixing rods (31) away from the connecting plate (24), a first motor (33) for generating an axial force is fixedly provided on one side of the two U-shaped mounting frames (32), and two detection cameras (34) for photographing and detecting the inner and outer diameters, length and width or thickness of a workpiece are fixedly provided at the output ends of the two first motors (33), respectively passing through the two U-shaped mounting frames (32).

6. The optical detection device for improving accuracy based on dual-station detection according to claim 2, characterized in that: The two clamping mechanisms (5) each comprise a fixed block (51), the tops of the two fixed blocks (51) being fixedly arranged on the two output ends of the adjustment mechanism (4) respectively, the bottoms of the two fixed blocks (51) being symmetrically fixedly arranged with connecting blocks (52) at both ends, and a first clamping block (53) for clamping a workpiece being rotatably arranged between two adjacent fixed blocks (51); The outer side of the first clamping block (53) is arranged in an arc shape.

7. The optical detection device for improving accuracy based on dual-station detection according to claim 6, characterized in that: A second motor (54) for generating an axial force is fixedly mounted on one side of each of the two fixing blocks (51), and output ends of the two second motors (54) pass through the two fixing blocks (51) and are fixedly connected to one end of the two first clamping blocks (53); A second clamping block (55) for clamping a workpiece is fixedly provided at the top end of one side of the first clamping block (53), and the width of the second clamping block (55) is greater than the width of the first clamping block (53).

8. The optical detection device for improving accuracy based on dual-station detection according to claim 7, characterized in that: The adjusting mechanism (4) comprises a fixing frame (41), the bottom sides of the fixing frame (41) are respectively fixedly connected to the surfaces of the two fixing plates (21), and the top inner side of the fixing frame (41) is fixedly provided with a cylinder (42) for driving the first clamping block (53) and the second clamping block (55) to move; The output end of the cylinder (42) and the center point of the workpiece are on the same vertical line.

9. The optical detection device for improving accuracy based on dual-station detection according to claim 8, characterized in that: An intermediate plate (43) is fixedly provided at the output end of the cylinder (42), an electric slide rail (44) is fixedly provided at the bottom of the intermediate plate (43), and two output ends of the electric slide rail (44) are respectively fixedly connected to the tops of the two fixed blocks (51).

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