Optical detection device capable of adjusting light source and use method of optical detection device

Abstract

The invention relates to the technical field of machine vision detection, and discloses an optical detection device with an adjustable light source and a use method thereof.The optical detection device comprises a fixing module and an adjusting module, the fixing module is provided with a connecting base, a light source generator is arranged in the connecting base, the adjusting module is provided with an adjusting ring, and a convex lens is arranged in the adjusting ring; a first light-transmitting hole is formed in the middle of the convex lens, a second light-transmitting hole is formed in the light source generator, a third light-transmitting hole is formed in the connecting base, and the first light-transmitting hole, the second light-transmitting hole and the third light-transmitting hole are the same in axis. The system has the following advantages: 1, the light spot penetrating through the convex lens is focused on the measured object by rotating the adjusting module, and the camera collects an undistorted image through the light hole; 2, the relative position of the light source and the measured object can be adjusted according to the actual structure without changing the mounting position of the light source generator; and 3, the structure is simple, disassembly is quick, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision detection, and particularly relates to an optical detection device with an adjustable light source and a using method thereof. Background Art

[0002] In automated production and processing equipment, in order to detect the angle, shape, color or structure of a workpiece, a camera is usually used to capture images. For example, in a terminal punching machine, when a wire is tinned or terminals are punched, a camera is used to capture the image of the wire core. The visual detection is used to identify the number and thickness of the wire cores of the wire. Such cameras usually need to use a lighting device to increase the brightness of the object to be measured, so that the camera can clearly capture the image.

[0003] However, in the existing automated production and processing equipment, the illumination mode of the visual detection light source is scattering. Therefore, the light source often needs to be installed very close to the object to be tested in order to have sufficient light to illuminate the object to be tested. This limits the relative position between the installation position of the light source and the object to be tested, and is not conducive to the design of its mechanical structure. In view of this, the inventor has made a new invention. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical detection device with an adjustable light source and a using method thereof, aiming at the deficiencies of the prior art, which has the advantages of high applicability and convenient use.

[0005] To achieve the above purpose, an optical detection device with an adjustable light source of the present invention includes a fixing module and an adjusting module. The fixing module is provided with a connecting seat, and a light source generator is arranged inside the connecting seat. The adjusting module is provided with an adjusting ring, and a convex lens is arranged inside the adjusting ring. A first light-transmitting hole is arranged in the middle of the convex lens. The light source generator is provided with a second light-transmitting hole, and the connecting seat is provided with a third light-transmitting hole. The axes of the first light-transmitting hole, the second light-transmitting hole, and the third light-transmitting hole are the same.

[0006] Further, the fixing module is provided with a fixing ring, and the connecting seat is fixedly arranged at one end of the fixing ring.

[0007] Furthermore, a first thread portion is arranged outside the fixing ring, and a second thread portion that can be threadedly connected with the first thread portion is arranged on the inner wall of the adjusting ring.

[0008] Preferably, the fixing ring is provided with a positioning hole.

[0009] Further, a step portion for installing the convex lens is arranged at one end of the adjusting ring.

[0010] Preferably, a plurality of locking holes are arranged at the position of the adjusting ring corresponding to the step portion.

[0011] Further, a limiting ring is provided between the fixing module and the adjusting module, and the limiting ring is provided with a third thread portion threadedly connected to the first thread portion.

[0012] Preferably, anti-slip threads are provided on the outer parts of the adjusting ring and the limiting ring.

[0013] Further, a scale ruler is provided on the outer part of the adjusting ring.

[0014] The present invention provides a method for using an optical detection device, including the optical detection device with an adjustable light source as described above:

[0015] S1. Install the connecting seat to the camera to connect the optical detection device to the camera, and the imaging optical axis of the camera directly penetrates through the first light-transmitting hole, the second light-transmitting hole, and the third light-transmitting hole;

[0016] S2. Rotate the adjusting ring according to the size of the object to be visually detected to focus the light spot on the object to be measured;

[0017] S3. Rotate the limiting ring to fix the position of the adjusting ring.

[0018] Beneficial effects: Compared with the prior art, the optical detection device with an adjustable light source and its using method of the present invention include a fixing module and an adjusting module. The fixing module is provided with a connecting seat, and a light source generator is arranged inside the connecting seat. The adjusting module is provided with an adjusting ring, and a convex lens is arranged inside the adjusting ring. A first light-transmitting hole is arranged in the middle of the convex lens, the light source generator is provided with a second light-transmitting hole, and the connecting seat is provided with a third light-transmitting hole. The axes of the first light-transmitting hole, the second light-transmitting hole, and the third light-transmitting hole are the same. The present invention has the following advantages: 1. By rotating the adjusting module, the light spot passing through the convex lens is focused on the object to be measured, and the camera collects a non-distorted image through the light-transmitting hole; 2. The relative position between the light source and the object to be measured can be adjusted according to the actual structure without changing the installation position of the light source generator; 3. The structure is simple, can be quickly disassembled, and is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0020] Figure 2 It is an exploded structure schematic diagram of the fixing module of the present invention.

[0021] Figure 3 It is an exploded structure schematic diagram of the adjusting module of the present invention.

[0022] Figure 4 It is a schematic diagram of the anti-slip threads and the scale ruler of the present invention.

[0023] Figure 5 It is a schematic diagram of the cross-section of the optical detection device of the present invention and a reference diagram of the optical axis of the camera and the light path of the light source generator.

[0024] The reference numerals include:

[0025] Fixing module - 1, connecting seat - 11, light source generator - 12, fixing ring - 13, first threaded portion - 131, positioning hole - 132, adjusting module - 2, adjusting ring - 21, second threaded portion - 211, convex lens - 22, first light-transmitting hole - 23, second light-transmitting hole - 24, third light-transmitting hole - 25, stepped portion - 26, locking hole - 27, scale - 28, limiting ring - 3, third threaded portion - 31, anti-slip pattern - 32. Detailed implementation manners

[0026] The present invention will be described in detail below with reference to the accompanying Figures 1 to 5 drawings.

[0027] An optical detection device with an adjustable light source according to the present invention includes a fixing module 1 and an adjusting module 2. The fixing module 1 is provided with a connecting seat 11. Inside the connecting seat 11, a light source generator 12 is provided. The light source generator 12 is detachably connected to the connecting seat 11. The light source generator 12 can adopt various light source generating devices according to the actual use scenario, such as an LED ring light source, a coaxial light source, etc. The adjusting module 2 is provided with an adjusting ring 21. Inside the adjusting ring 21, a convex lens 22 is provided. In the middle of the convex lens 22, a first light-transmitting hole 23 is provided. The light source generator 12 is provided with a second light-transmitting hole 24, and the connecting seat 11 is provided with a third light-transmitting hole 25. The axes of the first light-transmitting hole 23, the second light-transmitting hole 24, and the third light-transmitting hole 25 are the same. According to the solution of the present invention, by rotating the adjusting module 2, the light spot passing through the convex lens 22 is focused on the object to be measured, and the camera collects a non-distorted image through the first light-transmitting hole 23. Specifically, the optical detection device of the present invention is installed in front of the lens of the camera. The aperture of the first light-transmitting hole 23 matches the camera lens. The apertures of the second light-transmitting hole 24 and the third light-transmitting hole 25 are greater than or equal to the aperture of the first light-transmitting hole 23, so that the optical axis of the camera imaging directly penetrates the first light-transmitting hole 23. The light source emitted by the light source generator 12 is focused through the convex lens 22, and after the light spot is focused, a highly uniform light field is formed, so that the camera can obtain a high-definition and non-distorted image of the object to be measured. When detecting objects of various different sizes, without changing the relative position between the object to be measured and the camera, by adjusting the distance between the convex lens 22 and the light source generator 12, the position where the light source is focused through the convex lens 22 is adjusted, thereby adjusting the size of the light spot irradiated on the object to be measured. According to the solution of the present invention, the relative position between the light source and the object to be measured can be adjusted according to the actual structure without changing the installation position of the light source generator 12, and the applicability is high.

[0028] The fixing module 1 is provided with a fixing ring 13, and the connecting seat 11 is fixedly arranged at one end of the fixing ring 13. The fixing ring 13 and the connecting seat 11 are integrally formed, and the light source generator 12 is installed inside the connecting seat 11. By installing the connecting seat 11 on the camera, the fixing module 1 can be installed and fixed, and the installation and disassembly are convenient and fast.

[0029] A first thread portion 131 is arranged on the outer part of the fixing ring 13, and a second thread portion 211 which can be threadedly connected with the first thread portion 131 is arranged on the inner wall of the adjusting ring 21. In this solution, the fixing module 1 and the adjusting module 2 are threadedly connected. By screwing the adjusting ring 21 to rotate the adjusting module 2, the distance between the convex lens 22 and the light source generator 12 can be adjusted. The structures of the fixing module 1 and the adjusting module 2 are simple, and the adjusting module 2 can be quickly disassembled by screwing the adjusting module 2, so that the adjusting module 2 is separated from the fixing module 1, and the maintenance is convenient.

[0030] The fixing ring 13 is provided with a positioning hole 132. This optical detection device is more suitable for automated industrial production and processing equipment. The cameras of such equipment are usually fixedly installed on the frame. After the connecting seat 11 is fixed to the camera, a locking member can be locked into the positioning hole 132 to fix the fixing module 1 on the production and processing equipment, improve the connection stability between the fixing module 1 and the camera, and avoid the situation that the camera is misaligned when the adjusting module 2 is rotated.

[0031] One end of the adjusting ring 21 is provided with a step portion 26 for installing the convex lens 22. The height of the step portion 26 is greater than or equal to the height of the edge of the convex lens 22. After the convex lens 22 is installed in the step portion 26 in an embedded manner, the height of the step portion 26 matches the height of the lens edge, which can effectively limit the axial displacement of the convex lens 22 and prevent the convex lens 22 from tilting or shifting due to gravity or vibration.

[0032] A plurality of locking holes 27 are arranged at the position of the adjusting ring 21 corresponding to the step portion 26. A locking member can be locked into the locking holes 27 to connect and fix the convex lens 22 and the adjusting ring 21, and ensure the alignment accuracy of the first light transmission hole 23 and the camera optical axis.

[0033] A limiting ring 3 is further arranged between the fixing module 1 and the adjusting module 2. The limiting ring 3 is provided with a third thread portion 31 which is threadedly connected with the first thread portion 131. After the light spot is focused on the object to be measured by rotating the adjusting ring 21, the limiting ring 3 can be rotated to make the limiting ring 3 abut against the adjusting ring 21 to fix the position of the adjusting ring 21 and prevent the adjusting ring 21 from loosening.

[0034] Anti-slip patterns 32 are arranged on the outer parts of the adjusting ring 21 and the limiting ring 3. The anti-slip patterns 32 are formed by a plurality of vertically protruding strip-shaped convex blocks arranged in a sorted manner around the outer surfaces of the adjusting ring 21 and the limiting ring 3, which can facilitate the user to manually or use tools to rotate the adjusting ring 21 and the limiting ring 3 and improve the convenience.

[0035] A scale ruler 28 is provided outside the adjusting ring 21. The scale ruler 28 is arranged around the outer surface of the adjusting ring 21, which can facilitate the user to finely adjust the rotation angle of the adjusting module 2, record the corresponding angle value of the object to be measured. When replacing and using objects to be measured with different sizes, the user can quickly adjust the focusing position according to the recorded angle value, which is convenient to use.

[0036] The present invention provides a method for using an optical detection device, including the optical detection device with an adjustable light source described above:

[0037] S1. Install the connecting seat 11 to the camera to connect the optical detection device with the camera, and the imaging optical axis of the camera directly penetrates through the first light-transmitting hole 23, the second light-transmitting hole 24, and the third light-transmitting hole 25. When the optical detection device is paired with the camera, the aperture of the first light-transmitting hole 23 should match the diameter of the camera lens, and the imaging optical axis of the camera directly penetrates through the first light-transmitting hole 23 without obstruction.

[0038] S2. Rotate the adjusting ring 21 according to the size of the object to be visually detected to focus the light spot on the object to be measured. There should be a certain distance between the object to be measured and the convex lens 22 to facilitate the movement of the adjusting module 2 and the adjustment of the light spot focusing position, so that the light spot focuses on the end face of the object to be measured and forms a highly uniform light field larger than the diameter of the object to be measured.

[0039] S3. Rotate the limiting ring 3 to fix the position of the adjusting ring 21. After the position of the adjusting ring 21 is determined, rotate the limiting ring 3 to make the limiting ring 3 abut against and slightly push the adjusting ring 21, so that the second threaded portion 211 on the inner wall of the adjusting ring 21 and the first threaded portion 131 of the fixed ring 13 are tightly engaged with each other to prevent the adjusting module 2 from loosening.

[0040] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. An optical detection device with an adjustable light source, comprising a fixing module (1) and an adjusting module (2), characterized in that: The fixing module (1) is provided with a connecting seat (11), a light source generator (12) is provided inside the connecting seat (11), the adjusting module (2) is provided with an adjusting ring (21), a convex lens (22) is provided inside the adjusting ring (21), a first light-transmitting hole (23) is provided in the middle of the convex lens (22), the light source generator (12) is provided with a second light-transmitting hole (24), the connecting seat (11) is provided with a third light-transmitting hole (25), and the first light-transmitting hole (23), the second light-transmitting hole (24), and the third light-transmitting hole (25) have the same axis.

2. The optical detection device with adjustable light source according to claim 1, characterized in that: The fixing module (1) is provided with a fixing ring (13), and the connecting seat (11) is fixedly arranged at one end of the fixing ring (13).

3. The optical detection device with adjustable light source according to claim 2, characterized in that: The fixing ring (13) is provided with a first threaded portion (131) on the outside, and the adjusting ring (21) is provided with a second threaded portion (211) threadably connected to the first threaded portion (131) on the inner wall.

4. The optical detection device with adjustable light source according to claim 2, characterized in that: The fixing ring (13) is provided with a positioning hole (132).

5. The optical detection device with adjustable light source according to claim 1, characterized in that: One end of the adjustment ring (21) is provided with a step portion (26) for mounting a convex lens (22).

6. The optical detection device with adjustable light source according to claim 5, characterized in that: The adjusting ring (21) is provided with a plurality of locking holes (27) at positions corresponding to the step portions (26).

7. The optical detection device with adjustable light source according to claim 1, characterized in that: A limiting ring (3) is also provided between the fixing module (1) and the adjusting module (2), and the limiting ring (3) is provided with a third threaded portion (31) threadedly connected to the first threaded portion (131).

8. The optical detection device with adjustable light source according to claim 7, characterized in that: The outsides of the adjusting ring (21) and the limiting ring (3) are both provided with anti-slip grooves (32).

9. An optical detection device with an adjustable light source according to any one of claims 1 to 8, characterized in that: A scale (28) is arranged outside the adjustment ring (21).

10. A method for using an optical detection device, comprising the optical detection device with an adjustable light source according to any one of claims 1 to 9, characterized in that: S1, installing the connecting seat (11) to the camera, so that the optical detection device is connected to the camera, and the imaging optical axis of the camera directly penetrates the first light transmission hole (23), the second light transmission hole (24) and the third light transmission hole (25); S2, rotating the adjustment ring (21) according to the size of the object to be visually inspected, so that the light spot is focused on the object to be inspected; S3, rotating the limiting ring (3) to fix the position of the adjusting ring (21).

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