Automatic positioning device based on computer image recognition

Abstract

The invention discloses an automatic positioning device based on computer image recognition, and relates to the field of positioning devices.The automatic positioning device comprises an equipment base, a movable base and a clamp seat plate, a positioning support is arranged on the equipment base, and a positioning structure and an image recognition structure are arranged on the positioning support; a product clamp is arranged on the clamp seat plate, and an illumination positioning assembly is arranged on the product clamp; the positioning structure comprises a light-transmitting hole and a light-reflecting column, the light-transmitting hole is an annular hole, and a light-reflecting surface is arranged at the top of the light-reflecting column; the image recognition structure comprises a CCD (Charge Coupled Device) camera; the CCD camera is connected with the computer system so as to transmit shot image information; the product clamp comprises a placing plate, and the placing plate is used for placing a product; the illumination positioning assembly comprises a light source, a light-transmitting pipeline and a light plate, and the light plate is arranged on the placing plate and used for forming light spots under the action of reflected light.

Description

Technical Field

[0001] The invention relates to the field of positioning devices, in particular to an automatic positioning device based on computer image recognition. Background Art

[0002] After the production of some plastic or metal product parts, it may be necessary to lengthen the original product cylinder, such as some toys, medical supplies that need to penetrate into the patient's body, and the interconnections of automotive parts. These lengthened cylinders are usually connected by gluing, threading, etc. After the connection, due to the influence of the manufacturing process or the connection process, the center hole of the added cylinder and the original cylinder may not be aligned or deviate. Threaded connections may cause uneven heights of the cylinder after tightening due to different degrees of tightening of the threads. Sometimes these offsets or height differences are relatively small, and visual inspection by the human eye cannot quickly distinguish and screen them out, which may affect the subsequent use of the product. Summary of the invention

[0003] The object of the present invention is to provide an automatic positioning device based on computer image recognition to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic positioning device based on computer image recognition, comprising a device base, a mobile base and a fixture base plate, wherein the mobile base is mounted on the device base, the fixture base plate is mounted on the mobile base, a positioning bracket is provided on the device base, and a positioning structure and an image recognition structure are provided on the positioning bracket;

[0005] The fixture base plate is provided with a product fixture, and the product fixture is provided with a lighting positioning component;

[0006] The positioning structure includes a light-transmitting hole and a reflective column, wherein the light-transmitting hole is an annular hole, and a reflective surface is provided on the top of the reflective column;

[0007] The image recognition structure includes a CCD camera, and the CCD camera is connected to a computer system to transmit the captured image information;

[0008] The product fixture comprises a placement plate, and the placement plate is used to place the product;

[0009] The illumination positioning assembly includes a light source, a light-transmitting pipeline and a light plate, wherein the light source is arranged below the light-transmitting pipeline, the light-transmitting pipeline is arranged below the product column, and the light plate is arranged on the placement plate and is used to form a light spot under the action of reflected light.

[0010] Preferably, the mobile base includes a base mobile box, a motor slide rail, and a connecting plate. The bottom of the base mobile box is fixed on the equipment base, the motor slide rail is installed on the top surface of the base mobile box, and the connecting plate is installed on the motor slide rail and can be driven by the motor slide rail to move freely along the motor slide rail.

[0011] Preferably, the positioning bracket is provided with a transverse movable track and a vertical movable track, the transverse movable track is installed on the positioning bracket, and the vertical movable track is installed on the transverse movable track.

[0012] Preferably, the positioning structure also includes base one and base two, the root of the reflective column is fixedly mounted on base one, the head of the reflective column passes through the baffle and is located directly above the light-transmitting pipe, the baffle is mounted on base two through a bracket, the base one and base two are both fixedly mounted on a mounting plate, and the mounting plate is mounted on a vertical movable track.

[0013] Preferably, the joint analysis process of the CCD camera and the computer system is as follows:

[0014] Step 1. Continuously collect ten patterns formed by product columns of standard height under light, calculate the average pixel value of the corresponding position in each pattern, and synthesize a new image as the standard image;

[0015] Step 2. Collect reflected spot image samples from the top to the bottom of the product column in sequence, calculate the regional feature vector of the sample, and add the feature vector as a training sample to the machine learning classifier for training to obtain the classifier;

[0016] Step 3. Collect the current image, compare it with the standard image, filter out unqualified images, compare the unqualified images with the images in the classifier, and obtain the height type of the product column.

[0017] Preferably, the reflective surface is a conical surface.

[0018] Preferably, the product fixture further comprises a standing foot and a positioning baffle, wherein the standing foot is installed below the placement plate and symmetrically installed on both sides, and the positioning baffle is fixedly installed on the side of the placement plate.

[0019] Preferably, a cover box is provided above the equipment base, and an opening is provided on the front side of the cover box.

[0020] Preferably, a protective cover is provided on the outside of the light source and the light-transmitting pipeline, a split cover plate is provided above the protective cover, an electric push rod is provided at the rear end of the cover plate, and the electric push rod is installed on both sides of the placement plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The invention uses a light source arranged at the bottom of the product column to emit parallel light to illuminate the center hole of the column. If the newly added column and the product column do not deviate or deviate very little, the parallel light will illuminate the annular gap formed by the reflective column and the baffle after passing through the center hole, forming a complete annular aperture on the base. If a large amount of deviation occurs, the light beam formed by the parallel light passing through the center hole is an irregular circle, and the formed annular aperture will also change, which helps to judge whether the center hole that is difficult to observe inside is deviated.

[0023] 2. The reflective surface provided in the invention can reflect the parallel light of the light source and make the reflected light shine on the top of the column. Due to the influence of the column, a light spot will be formed on the light plate. If the height of the column is too high, the shadow area inside the light spot will increase. If the height of the column is low, the shadow area inside the light spot will be reduced. By recognizing the shape of the light spot through image, it is possible to quickly determine whether the height of the column is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention;

[0026] Figure 3 for Figure 2 A magnified view of the structure at inner A;

[0027] Figure 4 It is the structural diagram of the product fixture and lighting positioning components;

[0028] Figure 5 It is the structural diagram of the product fixture and lighting positioning components;

[0029] Figure 6 Exploded view of the components for lighting positioning;

[0030] Figure 7 It is a schematic diagram of the positioning structure;

[0031] Figure 8 This is the light spot diagram formed on the light plate when the light passing through the column is radiated by the reflective surface.

[0032] In the figure: 1-equipment base; 11-cover box; 2-movable base; 21-base moving box; 22-motor slide rail; 23-connecting plate; 3-fixture seat plate; 5-positioning bracket; 51-lateral moving track; 52-vertical moving track; 6-positioning structure; 61-light-transmitting hole; 62-reflective column; 621-reflective surface; 63-base one; 64-base two; 65-baffle; 66-bracket; 67-mounting plate; 7-image recognition structure; 71-CCD camera; 8-product fixture; 81-placing plate; 82-standing foot; 83-positioning baffle; 9-light positioning assembly; 91-light source; 92-light-transmitting pipeline; 93-light board; 94-protective cover; 95-cover plate; 96-electric push rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 7 The present invention provides a technical solution: an automatic positioning device based on computer image recognition, comprising a device base 1, a mobile base 2 and a fixture base plate 3, wherein the mobile base 2 is mounted on the device base 1, the fixture base plate 3 is mounted on the mobile base 2, a positioning bracket 5 is provided on the device base 1, and a positioning structure 6 and an image recognition structure 7 are provided on the positioning bracket 5;

[0035] The fixture base plate 3 is provided with a product fixture 8, and the product fixture 8 is provided with a lighting positioning component 9;

[0036] The positioning structure 6 includes a light-transmitting hole 61 and a reflective column 62. The light-transmitting hole 61 is an annular hole, and a reflective surface 621 is provided on the top of the reflective column 62.

[0037] The image recognition structure 7 includes a CCD camera 71, and the CCD camera 71 is connected to a computer system to transmit the captured image information;

[0038] The product fixture 8 includes a placement plate 81, and the placement plate 81 is used to place the product;

[0039] The illumination positioning assembly 9 includes a light source 91, a light-transmitting pipe 92 and a light plate 93. The light source 91 is arranged below the light-transmitting pipe 92, the light-transmitting pipe 92 is arranged below the product column, and the light plate 93 is arranged on the placement plate 81 and is used to form a light spot under the action of reflected light.

[0040] In this embodiment, the movable base 2 includes a base movable box 21, a motor slide rail 22, and a connecting plate 23. The bottom of the base movable box 21 is fixed on the equipment base 1, and the motor slide rail 22 is installed on the top surface of the base movable box 21. The connecting plate 23 is installed on the motor slide rail 22 and can be driven by the motor slide rail 23 to move freely along the motor slide rail 23. Driven by the motor slide rail 23, the connecting plate 23 can move freely in and out of the cover box 11.

[0041] In this embodiment, the positioning bracket 5 is provided with a transverse movable track 51 and a vertical movable track 52. The transverse movable track 51 is installed on the positioning bracket 5, and the vertical movable track 52 is installed on the transverse movable track 51. The transverse movable track 51 and the vertical movable track 52 can drive the image recognition structure 7 to move up and down and adjust the position to find the most suitable height position.

[0042] In this embodiment, the positioning structure 6 also includes a base one 63 and a base two 64. The root of the reflective column 62 is fixedly mounted on the base one 63. The head of the reflective column 62 passes through the baffle 65 and is located directly above the light-transmitting pipe 92. The baffle 65 is mounted on the base two 64 through a bracket 66. The base one 63 and the base two 64 are both fixedly mounted on a mounting plate 67. The mounting plate 67 is mounted on a vertical moving track 52. Since the diameter of the reflective column 62 is smaller than the through hole on the baffle 65, an annular light-transmitting hole 61 is formed between the reflective column 62 and the through hole on the baffle 65, so that light can pass through here to form an aperture on the base two 64.

[0043] In this embodiment, the joint analysis process of the CCD camera 71 and the computer system is as follows:

[0044] Step 1: Continuously collect ten patterns formed by product columns of standard height under light, calculate the average pixel value of the corresponding position in each pattern, and synthesize a new image as the standard image;

[0045] Step 2. Collect reflected spot image samples from the top to the bottom of the product column in sequence, calculate the regional feature vector of the sample, and add the feature vector as a training sample to the machine learning classifier for training to obtain the classifier;

[0046] Step 3. Collect the current image, compare it with the standard image, filter out unqualified images, compare the unqualified images with the images in the classifier, and obtain the height type of the product column.

[0047] In this embodiment, the reflecting surface 621 is a conical surface. Here, the reflecting surface 621 is a circular conical surface, which can reflect light in a cone shape.

[0048] In this embodiment, the product fixture 8 also includes a standing foot 82 and a positioning baffle 83. The standing foot 82 is installed below the placement plate 81 and symmetrically installed on both sides. The positioning baffle 83 is fixedly installed on the side of the placement plate 81. The positioning baffle 83 can provide positioning for the product, thereby improving the positioning accuracy.

[0049] In this embodiment, a cover box 11 is provided above the device base 1, and an opening is provided on the front side of the cover box 11. The cover box 11 can form a darker environment inside to facilitate the operation of the light source 91 and form an aperture and light spot for easy observation.

[0050] In this embodiment, a protective cover 94 is provided on the outside of the light source 91 and the light-transmitting pipe 92, and a split cover plate 95 is provided above the protective cover 94. An electric push rod 96 is provided at the rear end of the cover plate 95. The electric push rod 95 is installed on both sides of the placement plate 81. During the process of placing the product, the cover plate is kept closed by the electric push rod 96 to prevent the product from damaging the light plate 93. The electric push rod 96 is then directly opened for positioning detection.

[0051] Working principle: first place the product on the placement plate 81, and position it through the positioning baffle 83, so that the column and the center hole on the product are aligned with the light-transmitting pipe 92 below, and then turn on the light source 91. The light passes through the light-transmitting pipe 92 and the center hole to illuminate the bottom of the reflective column 62 above, and passes through the annular light-transmitting hole 61 between the reflective column 62 and the through hole of the baffle 65, forming an aperture on the base 63. By observing this aperture, it can be judged whether the center hole of the column is offset, and the light irradiated on the reflective surface 621 at the bottom of the reflective column 62 will be reflected and form a light spot on the light plate 93. By comparing the light spot shape taken by the CCD camera with the standard image and the image in the classifier, it can be judged whether the height of the column has deviation.

[0052] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An automatic positioning device based on computer image recognition, characterized in that: The device comprises a device base (1), a mobile base (2) and a fixture base plate (3), wherein the mobile base (2) is mounted on the device base (1), the fixture base plate (3) is mounted on the mobile base (2), a positioning bracket (5) is provided on the device base (1), and a positioning structure (6) and an image recognition structure (7) are provided on the positioning bracket (5); The fixture base plate (3) is provided with a product fixture (8), and the product fixture (8) is provided with a lighting positioning component (9); The positioning structure (6) comprises a light-transmitting hole (61) and a light-reflecting column (62); the light-transmitting hole (61) is an annular hole, and the top of the light-reflecting column (62) is provided with a light-reflecting surface (621); The image recognition structure (7) comprises a CCD camera (71), and the CCD camera (71) is connected to a computer system to transmit captured image information; The product fixture (8) comprises a placement plate (81), and the placement plate (81) is used to place the product; The illumination positioning assembly (9) comprises a light source (91), a light-transmitting pipe (92) and a light plate (93); the light source (91) is arranged below the light-transmitting pipe (92); the light-transmitting pipe (92) is arranged below the product column; and the light plate (93) is arranged on the placement plate (81) and is used to form a light spot under the action of reflected light.

2. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: The movable base (2) comprises a base movable box (21), a motor slide rail (22), and a connecting plate (23); the bottom of the base movable box (21) is fixed on the device base (1); the motor slide rail (22) is installed on the top surface of the base movable box (21); and the connecting plate (23) is installed on the motor slide rail (22) and can be driven by the motor slide rail (23) to move freely along the motor slide rail (23).

3. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: The positioning bracket (5) is provided with a transverse moving track (51) and a vertical moving track (52); the transverse moving track (51) is installed on the positioning bracket (5), and the vertical moving track (52) is installed on the transverse moving track (51).

4. The automatic positioning device based on computer image recognition according to claim 3, characterized in that: The positioning structure (6) also includes a base one (63) and a base two (64); the root of the reflective column (62) is fixedly mounted on the base one (63); the head of the reflective column (62) passes through a baffle (65) and is located directly above the light-transmitting pipe (92); the baffle (65) is mounted on the base two (64) via a bracket (66); the base one (63) and the base two (64) are both fixedly mounted on a mounting plate (67); and the mounting plate (67) is mounted on a vertical movable track (52).

5. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: The joint analysis process of the CCD camera (71) and the computer system is as follows: Step 1. Continuously collect ten patterns formed by product columns of standard height under light, calculate the average pixel value of the corresponding position in each pattern, and synthesize a new image as the standard image; Step 2. Collect reflected spot image samples from the top to the bottom of the product column in sequence, calculate the regional feature vector of the sample, and add the feature vector as a training sample to the machine learning classifier for training to obtain the classifier; Step 3. Collect the current image, compare it with the standard image, filter out unqualified images, compare the unqualified images with the images in the classifier, and obtain the height type of the product column.

6. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: The reflective surface (621) is a conical surface.

7. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: The product fixture (8) also includes a standing foot (82) and a positioning baffle (83), wherein the standing foot (82) is installed below the placement plate (81) and symmetrically installed on both sides, and the positioning baffle (83) is fixedly installed on the side of the placement plate (81).

8. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: A cover box (11) is provided above the equipment base (1), and an opening is provided on the front side of the cover box (11).

9. The automatic positioning device based on computer image recognition according to claim 1, characterized in that: A protective cover (94) is provided on the outside of the light source (91) and the light-transmitting pipeline (92); a split cover plate (95) is provided above the protective cover (94); an electric push rod (96) is provided at the rear end of the cover plate (95); and the electric push rod (95) is installed on both sides of the placement plate (81).

Images