CCD (Charge Coupled Device) detection device for 90-degree plastic elbow

Abstract

The invention discloses a 90-degree plastic elbow CCD detection device, and belongs to the technical field of plastic pipe fitting detection. The device comprises a main body structure, a rotatable conveying disc is arranged on the main body structure, the conveying disc is arranged corresponding to a conveying belt at the rear end of a previous procedure, the conveying disc is made of a transparent material, and a sorting mechanism is arranged on the conveying disc; a detection assembly, a waste collection box and a qualified product conveying belt are arranged on the main body structure; the detection assembly shoots the appearance and the size of the bent pipe so as to provide image data for defect recognition, and based on the recognition result of the image data, the sorting mechanism correspondingly sorts products to the waste collecting box and the qualified product conveying belt. According to the invention, a cooperative detection system composed of a plurality of industrial cameras, a conveying structure and a sorting mechanism is constructed; a to-be-detected plastic pipe fitting is driven to rotate, a plurality of cameras which are arranged in a surrounding manner are used for synchronously or separately acquiring images of the surface of the pipe fitting from different angles, and finally defect detection and size measurement of the inner surface and the outer surface of the plastic pipe fitting are realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plastic pipe detection, and particularly relates to a 90-degree plastic elbow pipe CCD detection device. BACKGROUND

[0002] In the production and processing of PPR pipe fittings, the pipe fittings need to be detected in size, shape and other quality, and the prior art usually adopts a single fixed industrial camera to collect and analyze images of the pipe fittings from a specific angle (usually the top). This single-view detection method cannot identify defects such as shrink marks and slight deformation that require three-dimensional feature judgment, and the recognition accuracy is not high; and for elbow pipe fittings with complex structure, there are dead angles on the side wall, inner wall and bottom, which are easy to cause missed detection. SUMMARY

[0003] In view of the above problems in the prior art, the purpose of the present application is to provide a 90-degree plastic elbow pipe CCD detection device, which constructs a cooperative detection system composed of multiple industrial cameras, a conveying structure and a sorting mechanism. By driving the plastic pipe to be detected to rotate, and using multiple cameras arranged around to synchronously or intermittently collect images of the pipe surface from different angles, the defect detection and size measurement of the inner and outer surfaces of the plastic pipe are finally realized.

[0004] The present application provides the following technical scheme: a 90-degree plastic elbow pipe CCD detection device, comprising a main body structure, wherein a rotatable conveying disc is arranged on the main body structure, the conveying disc is arranged corresponding to the conveying belt at the rear end of the previous process, the conveying disc is made of transparent material, and a sorting mechanism is arranged on the conveying disc; a detection assembly, a waste product collection box and a qualified product conveying belt are arranged on the main body structure; the detection assembly photographs the appearance and size of the elbow pipe to provide image data for defect identification; based on the identification result of the image data, the sorting mechanism correspondingly sorts the waste product with defects and the normal qualified product to the waste product collection box and the qualified product conveying belt.

[0005] Further, a conveying guide rod is arranged on the mounting bracket of the conveying belt, the conveying guide rod extends to the conveying disc, and is used for guiding the elbow pipe of the conveying belt to the conveying disc.

[0006] Further, a position-adjustable correction plate is arranged on the conveying disc, and is used for correcting the position of the elbow pipe on the conveying disc, so that the elbow pipe is placed along the tangential direction of the conveying disc.

[0007] Further, the detection assembly comprises a pipe opening detection camera one for detecting the pipe opening of the bottom of the elbow pipe, a bending part detection camera for detecting the bending part, a side part detection camera one and a side part detection camera two for detecting the two sides of the elbow pipe, and a pipe opening detection camera two for detecting the horizontal pipe opening of the elbow pipe.

[0008] Further, the nozzle detection camera one is located below the conveying disc, and the camera thereof is arranged vertically upward; the curved portion detection camera, the nozzle detection camera two, the side portion detection camera one and the side portion detection camera two are sequentially arranged along the rotation direction of the conveying disc; and the cameras of the curved portion detection camera and the nozzle detection camera two are arranged along the tangent direction of the conveying disc and respectively face the curved portion of the elbow pipe and the horizontal nozzle of the elbow pipe; and the cameras of the side portion detection camera one and the side portion detection camera two are arranged along the axial direction of the conveying disc and respectively perpendicularly face the two sides of the elbow pipe.

[0009] Further, the curved portion detection camera, the side portion detection camera one, the side portion detection camera two and the nozzle detection camera two can be adjusted in the up-down and front-back directions and are correspondingly provided with a diffuse reflection light source or a polarizing mirror for eliminating reflection; and the nozzle detection camera one can be vertically moved up and down.

[0010] Further, the curved portion detection camera, the side portion detection camera one, the side portion detection camera two and the nozzle detection camera two are mounted on the adjusting base, the adjusting base comprises a bottom fixed block, a transition connecting plate block movably arranged on the bottom fixed block and a mounting block movably arranged in the front-back direction, and each detection camera is movably arranged on the mounting block; the main body structure is provided with a mounting rod, and the nozzle detection camera one is movably arranged on the mounting rod.

[0011] Further, the sorting mechanism comprises a sorting base, and a pneumatic cylinder is vertically arranged on the sorting base; an output end of the pneumatic cylinder is connected with a mounting plate, and a sorting rod for sorting the qualified elbow pipe onto the qualified product conveying belt is rotatably arranged on the mounting plate.

[0012] Further, a waste product guide rod is arranged above the waste product collecting box, and one side of the waste product guide rod extends to the conveying disc and is used for guiding the unqualified waste product into the waste product collecting box.

[0013] Further, the main body structure is further provided with a counter for recording the number of elbow pipe products.

[0014] By adopting the above technology, compared with the prior art, the beneficial effects of the present application are as follows: 1) In the present application, the combination design of the nozzle detection camera, the curved portion detection camera and the side portion detection camera constructs a surrounding imaging system; these cameras respectively collect images from the bottom, the top, the curved outer side and the two sides of the elbow pipe, can detect the appearance of the pipe, the size of the port, the flash, the bending degree and the like, can effectively identify complex defects such as shrink marks and deformation, reduce the missed detection rate and reduce the occurrence of detection blind area; 2) In the application, based on the adjustable design of each camera position, combined with the matched diffuse reflection light source or polarizing mirror, the shooting angle and lighting conditions can be adjusted according to the actual size and reflection characteristics of the elbow pipe, which can effectively eliminate the interference of plastic surface reflection and provide high contrast and clear images for subsequent detection and analysis; 3) In the application, based on the setting of the adjustable correction plate, each elbow pipe can be accurately corrected to a uniform angle at the detection station, ensuring the consistency of the pipe posture during each shooting, thereby improving the stability and repeatability of the detection; 4) In the application, based on the design of the sorting mechanism, the qualified elbow pipes and waste elbow pipes can be sorted into corresponding waste collection boxes and qualified product conveying belts. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the internal structure of the application; Figure 2 is a schematic diagram of the internal structure of the application; Figure 3 is a schematic diagram of the assembly structure of the pipe mouth detection camera one of the application; Figure 4 is a schematic diagram of the assembly structure of the adjustment base and the diffuse reflection light source of the application; Figure 5 is Figure 1 is an enlarged structure schematic diagram of position C in the application; Figure 6 is Figure 1 is an enlarged structure schematic diagram of position D in the application.

[0016] 1, conveying disc; 2, conveying belt; 3, waste collection box; 4, qualified product conveying belt; 5, conveying guide rod; 6, correction plate; 7, diffuse reflection light source; 8, adjustment base; 9, mounting rod; 10, counter; 301, waste guide rod; 801, bottom fixing block; 802, transition connecting plate block; 803, mounting block; A, sorting mechanism; A01, sorting base; A02, air cylinder; A03, mounting plate; A04, sorting rod; B, detection assembly; B01, pipe mouth detection camera one; B02, elbow detection camera; B03, side detection camera one; B04, side detection camera two; B05, pipe mouth detection camera two; DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application is further described in detail below in combination with the drawings and examples in the specification. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0018] On the contrary, the present application covers any substitution, modification, equivalent method and scheme made within the gist and scope of the present application defined by the claims. Further, in order to make the public have a better understanding of the present application, some specific details are described in the following detailed description of the present application. The present application can also be completely understood without the description of these details by those skilled in the art.

[0019] Please refer to Figures 1-6 A 90-degree plastic elbow pipe CCD detection device, comprising a detection device main structure and a conveying disc 1, a sorting mechanism A, a detection assembly B, a waste collection box 3 and a qualified product conveying belt 4 arranged on the main structure, Specifically, a frame mechanism is arranged on the outside of the main structure, and a placing platform is arranged inside. A rotary motor is arranged at the center of the placing platform. The output shaft of the rotary motor is connected with a ring-shaped conveying disc 1. The conveying disc 1 is a two-layer structure and is made of transparent material. It is arranged corresponding to the conveying belt 2 at the rear end of the previous process. A conveying guide rod 5 is arranged on the bracket on which the conveying belt 2 is installed. The conveying guide rod 5 is arranged obliquely. One end is threadedly fastened to the bracket, and the other end extends to the conveying disc 1, which is used to guide the elbow pipe of the conveying belt 2 to the conveying disc 1.

[0020] Specifically, a correction plate 6 is arranged near the intersection of the conveying disc 1 and the conveying belt 2 on the placing platform of the main structure, which is used to correct the position of the elbow pipe on the conveying disc 1, so that the elbow pipe is placed along the tangential direction of the conveying disc 1. The correction plate 6 is an arc-shaped plate which is fixed on a correction plate adjusting base. The correction plate adjusting base includes a base bracket and an adjusting bracket which is movable forward and backward on the base bracket. The correction plate 6 is fixed on the front end of the adjusting bracket, and the adjusting bracket can be fixed with the base bracket by fastening screws.

[0021] Specifically, the detection assembly B is arranged on the placing platform of the main structure, which includes a pipe mouth detection camera one B01, a bending part detection camera B02, a side detection camera one B03, a side detection camera two B04 and a pipe mouth detection camera two B05.

[0022] Among them, a vertical mounting rod 9 is fixedly installed below the conveying disc 1 on the placing platform. The pipe mouth detection camera one B01 is fixed on the mounting rod 9, and the mounting position can be adjusted up and down. The pipe mouth detection camera one B01 can shoot the image of the pipe mouth at the bottom of the elbow pipe, which is used to detect the appearance and size of the bottom pipe mouth.

[0023] Specifically, the camera of the bending part detection camera B02 and the pipe opening detection camera two B05 are arranged along the tangential direction of the conveying disc 1; and are respectively arranged opposite to the bending part of the elbow pipe and the horizontal pipe opening of the elbow pipe, for shooting the images of the bending part and the horizontal pipe opening of the elbow pipe, for detecting the corresponding appearance and size; the cameras of the side part detection camera one B03 and the side part detection camera two B04 are arranged along the axial direction of the conveying disc 1, and are respectively arranged perpendicular to the two sides of the elbow pipe, for shooting the images of the two sides of the elbow pipe, for detecting the appearance and size of the two sides.

[0024] The bending part detection camera B02, the side part detection camera one B03, the side part detection camera two B04 and the pipe opening detection camera two B05 are all fixed on the adjusting base 8.

[0025] The adjusting base 8 comprises a bottom fixed block 801 and a transition connecting block 802, the bottom fixed block 801 is fixed on the placing platform of the main body structure, and the transition connecting block 802 is fixed on the bottom fixed block 801 through two guide rods and fastening screws, the mounting block 803 is fixed on the transition connecting block 802 through two guide rods and fastening screws, and the detection camera is fixedly mounted on the front end of the corresponding mounting block 803; the placing platform of the main body structure is also provided with a diffuse reflection light source 7 or a polarizing mirror arranged correspondingly to the detection camera, so as to eliminate the reflection caused by the smoothness of the product.

[0026] Specifically, the sorting mechanism A comprises a sorting base A01 fixed on the placing platform of the main body structure, a gas cylinder A02 vertically arranged on the sorting base A01, an installation plate A03 connected to the output end of the gas cylinder A02, and a sorting rod A04 arranged on the installation plate A03 and rotatable, for sorting the qualified elbow pipe to the qualified product conveying belt 4, wherein the sorting rod A04 is a bending structure.

[0027] Specifically, the waste product collecting box 3 and the qualified product conveying belt 4 are arranged below the conveying disc 1 and at the installation position of the sorting mechanism A.

[0028] The upper side of the waste product collecting box 3 is provided with a waste product guide rod 301, one side of the waste product guide rod 301 extends to the conveying disc 1, for guiding the unqualified waste product into the waste product collecting box 3.

[0029] The main body structure is also provided with a counter 10 for recording the number of elbow pipe products.

[0030] The qualified product conveying belt 4 is a conventional conveying belt mechanism, which is connected to the next process equipment.

[0031] The working process of the device of the embodiment is as follows: The elbow pipe on the conveying belt 2 is guided to the conveying disc 1 through the conveying guide rod 5 in the conveying process. The conveying disc 1 rotates to drive the elbow pipe to rotate and move. The bottom pipe opening, the bending part, the horizontal pipe opening and the two sides of the elbow pipe are respectively imaged by the pipe opening detection camera B01, the bending part detection camera B02, the side detection camera B01, the side detection camera B02 and the pipe opening detection camera B05. According to the imaged images, image data for the appearance and size defect inspection of the elbow pipe is provided. The central processing system (which is a conventional detection system and is generally integrated on the host computer) judges whether the product is a qualified product or a waste product based on the image data and controls the cylinder A02 in the sorting mechanism A. When the product is judged to be a qualified product, the cylinder A02 does not work, and the sorting rod A04 through which the elbow pipe passes is guided to the qualified product conveying belt 4. When the elbow pipe is judged to be a waste product, the cylinder A02 is started to drive the sorting rod A04 to be lifted, and the waste product is guided to the waste product collecting box 3 through the waste product guide rod 301 to complete the detection and screening of the product.

[0032] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A CCD detection device for a 90-degree plastic bend pipe, comprising a main structure, characterized in that, The main structure is provided with a rotatable conveyor plate (1), which is correspondingly set with the conveyor belt (2) at the rear end of the previous process. The conveyor plate (1) is made of transparent material and is provided with a sorting mechanism (A). The main structure is provided with a detection component (B), a waste collection box (3), and a qualified product conveyor belt (4). The detection component (B) takes a picture of the appearance and size of the bent pipe to provide image data for defect identification. Based on the identification results of the image data, the sorting mechanism (A) sorts the defective waste products and normal qualified products onto the waste collection box (3) and the qualified product conveyor belt (4).

2. The CCD detection device for a 90-degree plastic bend pipe according to claim 1, characterized in that, The mounting bracket of the conveyor belt (2) is provided with a conveyor guide rod (5), which extends to the conveyor disc (1) to guide the bend of the conveyor belt (2) to the conveyor disc (1).

3. The CCD detection device for a 90-degree plastic bend pipe according to claim 1, characterized in that, The conveyor plate (1) is provided with an adjustable correction plate (6) for correcting the position of the bend on the conveyor plate (1) so that the bend is placed along the tangent of the conveyor plate (1).

4. The CCD detection device for a 90-degree plastic bend pipe according to claim 1, characterized in that, The detection component (B) includes a pipe opening detection camera (B01) for detecting the bottom opening of the bend, a bend detection camera (B02) for detecting the bend, a side detection camera (B03) and a side detection camera (B04) for detecting both sides of the bend, and a pipe opening detection camera (B05) for detecting the horizontal opening of the bend.

5. The CCD detection device for a 90-degree plastic bend pipe according to claim 4, characterized in that, The first pipe opening detection camera (B01) is located below the conveyor plate (1), and its camera is set vertically upward; the second bending section detection camera (B02), the second pipe opening detection camera (B05), the first side detection camera (B03), and the second side detection camera (B04) are arranged sequentially along the rotation direction of the conveyor plate (1); the cameras of the second bending section detection camera (B02) and the second pipe opening detection camera (B05) are arranged along the tangent of the conveyor plate (1), respectively facing the bending part of the pipe and the horizontal pipe opening of the pipe; the cameras of the first side detection camera (B03) and the second side detection camera (B04) are arranged along the axial direction of the conveyor plate (1), respectively perpendicular to the two sides of the pipe.

6. The CCD detection device for a 90-degree plastic bend pipe according to claim 5, characterized in that, The bending section detection camera (B02), side detection camera one (B03), side detection camera two (B04) and pipe opening detection camera two (B05) can all be adjusted up and down and forward and backward, and are respectively equipped with a diffuse reflection light source (7) or a polarizing mirror for eliminating reflection; the pipe opening detection camera one (B01) can move vertically up and down.

7. The CCD detection device for a 90-degree plastic bend pipe according to claim 6, characterized in that, The bending section detection camera (B02), side detection camera one (B03), side detection camera two (B04), and pipe opening detection camera two (B05) are all mounted on the adjustment base (8). The adjustment base (8) includes a bottom fixing block (801), a transition connecting plate (802) that can be moved up and down on the bottom fixing block (801), and a mounting block (803) that can be moved back and forth. Each detection camera can be moved back and forth on the mounting block (803). The main structure is provided with a mounting rod (9), and the pipe opening detection camera one (B01) can be adjusted up and down on the mounting rod (9).

8. The CCD detection device for a 90-degree plastic bend pipe according to claim 1, characterized in that, The sorting mechanism (A) includes a sorting base (A01), a cylinder (A02) is vertically mounted on the sorting base (A01), the output end of the cylinder (A02) is connected to a mounting plate (A03), and a sorting rod (A04) for sorting qualified bent tubes onto the qualified product conveyor belt (4) is rotatably and adjustable on the mounting plate (A03).

9. A CCD detection device for a 90-degree plastic bend pipe according to claim 8, characterized in that, The waste collection box (3) is provided with a waste guide rod (301) above it. One side of the waste guide rod (301) extends to the conveyor plate (1) to guide the unqualified waste into the waste collection box (3).

10. A CCD detection device for a 90-degree plastic bend pipe according to claim 1, characterized in that, The main structure is also equipped with a counter (10) for recording the number of bent pipe products.

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