A multi-view vision double-area hole position detection device and method for large-format cutting

Abstract

The present application relates to the technical field of cutting piece punching quality detection, and particularly relates to a multi-view visual double-region hole position detection device and method for large-format cutting pieces, which comprises a detection disc, a driving assembly, a feeding station, a detection station, a finished product station and a waste product station; the detection disc has a plurality of bearing tables, and the driving assembly supports and drives the detection disc to rotate; the detection station is provided with a visual detection device, which comprises an image acquisition unit, an image processing unit and a control unit; the image acquisition unit comprises a first camera, a second camera and a third camera, and is used for acquiring hole position images of processing regions and splicing regions; the image processing unit is used for processing and analyzing the hole position images; and the control unit controls the flow direction of the cutting pieces according to the analysis results. The bearing tables ensure that the cutting pieces are always within the detection range, and the multi-camera synchronously acquires the cutting pieces, which can comprehensively cover multiple regions of the cutting pieces, avoids the occurrence of missed detection, and improves the accuracy and integrity of the detection results.

Description

Technical Field

[0001] This invention relates to the field of cutting sheet punching quality inspection technology, and in particular to a multi-view vision dual-region hole position detection device and method for large-format cutting sheets. Background Technology

[0002] In the automotive seat manufacturing industry, cut panels are a key component of the seat. To meet different functional requirements, cut panels typically need to be punched to create various types of holes, including positioning holes (for assembly alignment), ventilation holes (for airflow circulation), and densely packed ventilation holes (for enhancing breathability and comfort). For processing large-format cut panels, a dual-station punching process is often used to improve efficiency, where the cut panel is divided into left and right areas for simultaneous processing. While this process increases processing speed, it also introduces new technical challenges. Because it is difficult to maintain consistent reference points between the two processing areas, the hole spacing can easily exceed tolerances, resulting in uneven hole distribution and affecting the appearance quality and functional performance of the cut panel. Therefore, after the cut panel is processed, the processed holes must undergo quality inspection.

[0003] Current visual inspection devices mostly use monocular vision for inspection, and their acquisition area is pre-set and fixed. When the cut piece enters the acquisition area via a conveyor belt, vibration or uneven speed of the conveyor belt may cause the cut piece to shift position. Once the cut piece shifts, the set acquisition area cannot fully cover the area to be inspected, resulting in the failure to detect holes in critical areas, affecting the completeness and accuracy of the inspection results. In addition, due to incomplete or inaccurate inspection, defective cut pieces may be misjudged as qualified products and thus flow into subsequent production stages, seriously affecting the quality of the final product. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-view dual-region hole position detection device and method for large-format cut pieces, which effectively solves the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a multi-view dual-area hole position detection device for large-format cut pieces, comprising: a detection disk, a driving assembly, and a feeding station, a detection station, a finished product station, and a scrap station arranged sequentially along the circumferential direction of the detection disk;

[0006] The inspection tray has multiple support platforms for carrying the cut pieces; the drive assembly supports and drives the inspection tray to rotate, so that the cut pieces can flow between various workstations;

[0007] The inspection station is equipped with a visual inspection device, including an image acquisition unit, an image processing unit, and a control unit;

[0008] The detection head of the image acquisition unit is located above the detection disk and includes a first camera, a second camera and a third camera. The first camera and the second camera are used to acquire the first hole position image and the second hole position image of the two processing areas on the cut piece, respectively. The third camera is used to acquire the third hole position image of the cut piece splicing area.

[0009] The image processing unit is used to process and analyze the received first hole image, second hole image and third hole image, and to determine whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards.

[0010] The control unit controls the flow direction of the cut pieces based on the analysis results of the image processing unit, so that qualified products are transferred to the finished product station and unqualified products are transferred to the scrap station.

[0011] Furthermore, the image processing unit includes an image preprocessing module, a hole location recognition module, and a data analysis module;

[0012] The image preprocessing module is used to perform grayscale conversion, binarization and noise reduction on the acquired first hole image, second hole image and third hole image in sequence.

[0013] The hole location recognition module is used to identify the center coordinates of the hole location in the preprocessed image;

[0014] The data analysis module is used to calculate the hole spacing within the region and the hole spacing in the splicing region based on the center coordinates of the hole positions, and compare it with the preset standard hole spacing to determine whether the hole spacing is qualified.

[0015] Furthermore, the visual inspection device also includes a light source device;

[0016] The light source device adopts a ring light source, a strip light source, or a combination of both.

[0017] Furthermore, the image acquisition unit also includes:

[0018] Support columns are used to support the entire image acquisition unit;

[0019] A data acquisition mounting bracket is used to mount the first camera, the second camera, and the third camera;

[0020] A linear module is disposed between the side wall of the support column and the acquisition mounting base;

[0021] The moving path of the linear module is set along the parallel direction of the first processing area and the second processing area on the cut piece. The acquisition mounting base can move along the preset path on the linear module to adjust the acquisition area of ​​the third camera on the cut piece to cover the corresponding splicing area.

[0022] Furthermore, the support platform includes:

[0023] The base is fixed on the detection plate;

[0024] The conveying assembly includes a drive roller, a driven roller, a conveyor belt, and a drive motor. Both ends of the drive roller and the driven roller are fixed to the base via bearing seats, and the conveyor belt is wrapped around the drive roller and the driven roller.

[0025] A limiting seat is located between the driving roller and the driven roller, and its two protruding sides along the width direction of the conveyor belt are fixed to the base.

[0026] The top and bottom surfaces of the limiting seat are provided with grooves for the conveyor belt to pass through, and the conveyor belt on the support platform can convey the cut pieces along the radial direction of the detection disc.

[0027] Furthermore, a limiting plate is provided at one end of the conveyor belt near the center of the detection tray;

[0028] A proximity switch is provided on the limiting plate to control the position of the cut piece on the conveyor belt;

[0029] A clamping assembly is provided above the conveyor belt. The clamping assembly includes an eccentric roller and a servo motor for driving the eccentric roller to rotate. The two ends of the eccentric roller are fixed on the limiting seat by bearing seats.

[0030] Furthermore, the limiting seat is provided with a negative pressure chamber, and a pressure sensor is installed in the negative pressure chamber to monitor the pressure of the negative pressure chamber in real time;

[0031] The limiting seat has several through holes on the upper surface corresponding to the groove, and the several through holes are connected to the negative pressure cavity.

[0032] Furthermore, a feeding and conveying assembly is provided at the loading station, and the conveying plane of the feeding and conveying assembly is located above the detection plate;

[0033] A guide plate is provided at the outlet of the feeding and conveying assembly. The end of the guide plate near the detection plate is inclined downward and gradually converges inward along the two side walls along the conveying direction.

[0034] Furthermore, both the finished product station and the scrap station are equipped with material distribution and conveying components;

[0035] The conveying planes of both material dispensing and conveying components are located below the detection disc, and a guide hopper is provided between the detection disc and the material dispensing and conveying components.

[0036] This invention also provides a method for detecting hole positions in large-format cut pieces using multi-view dual-region vision, employing the multi-view dual-region hole position detection device for large-format cut pieces as described above, and including the following steps:

[0037] Place the cut piece to be inspected on the conveyor at the feeding station. The conveyor will transport the cut piece to the carrier platform of the inspection tray and ensure that the cut piece is correctly placed and fixed on the carrier platform.

[0038] The drive component starts, causing the inspection tray to rotate and transferring the cut pieces on the carrier table to the inspection station;

[0039] When the cut piece arrives at the inspection station, the image acquisition unit is activated. The first and second cameras acquire images of the two processing areas of the cut piece, respectively, to obtain the first hole image and the second hole image. The third camera acquires images of the splicing area of ​​the cut piece to obtain the third hole image.

[0040] The image processing unit processes and analyzes the received first hole position image, second hole position image and third hole position image, and determines whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards.

[0041] Based on the analysis results of the image processing unit, the control unit determines whether the cut piece is qualified. If the cut piece is qualified, the control unit controls the detection plate to continue rotating and transfers the cut piece to the finished product station. If the cut piece is unqualified, the control unit controls the detection plate to transfer the cut piece to the scrap station.

[0042] The conveyor at the finished product station transports qualified cut pieces to subsequent production stages, while the conveyor at the scrap station transports unqualified cut pieces to the scrap collection area.

[0043] The beneficial effects of this invention are as follows: By setting up a support platform, this invention limits the position of the cut piece on the detection plate, ensuring that the cut piece is always within the detection range of the image acquisition unit; and by using multiple cameras to simultaneously acquire multiple areas of the cut piece, it can fully cover multiple areas of the cut piece, avoiding the occurrence of missed detection. Furthermore, after the acquired images are processed and analyzed by the image processing unit, it can more accurately determine whether the hole spacing meets the quality standards, thereby improving the accuracy and completeness of the detection results.

[0044] This invention integrates the feeding, inspection, finished product conveying, and waste product conveying stations onto a single inspection disc, forming a complete automated production cycle line. The inspection disc is rotated by a drive component, enabling the automatic flow of cut pieces between the stations, reducing manual intervention and improving the automation level of inspection. Furthermore, the control unit automatically controls the flow direction of the cut pieces based on the analysis results of the image processing unit, which can quickly and accurately separate qualified and unqualified products, avoiding human error and ensuring the quality of the final product. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the multi-view dual-region aperture detection device in an embodiment of the present invention;

[0047] Figure 2 This is a schematic diagram showing the positions of the detection disk and the visual inspection device in an embodiment of the present invention;

[0048] Figure 3 This is a left view of the detection disk and the visual inspection device in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram showing the distribution of multiple cameras on the acquisition mounting base in an embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram showing the distribution of the support platform on the detection plate in an embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of the structure of the support platform in an embodiment of the present invention;

[0052] Figure 7 This is a cross-sectional schematic diagram of the support platform in an embodiment of the present invention;

[0053] Figure 8 This is a schematic diagram of the operation of the clamping assembly in an embodiment of the present invention;

[0054] Figure 9 This is a schematic diagram showing the distribution of the feeding and conveying components and the distributing and conveying components in an embodiment of the present invention.

[0055] Reference numerals: 1. Detection plate; 2. Support platform; 21. Base; 22. Limiting seat; 221. Negative pressure chamber; 222. Through hole; 23. Conveying assembly; 231. Driving roller; 232. Driven roller; 233. Conveyor belt; 234. Drive motor; 24. Limiting plate; 25. Proximity switch; 3. Loading station; 31. Feeding and conveying assembly; 32. Guide plate; 4. Detection station; 41. First camera; 42. Second camera; 43. Third camera; 44. Light source device; 45. Support column; 46. Acquisition mounting base; 47. Linear module; 5. Finished product station; 51. Distributing and conveying assembly; 52. Guide hopper; 6. Scrap station; 7. Drive assembly; 8. Clamping assembly. Detailed Implementation

[0056] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0057] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] like Figures 1 to 9 The large-format cut piece multi-view dual-area hole position detection device shown includes: detection plate 1, drive assembly 7, and feeding station 3, detection station 4, finished product station 5 and scrap station 6 arranged sequentially along the circumference of detection plate 1;

[0060] The inspection tray 1 has multiple support platforms 2 for carrying the cut pieces; the drive assembly 7 supports and drives the inspection tray 1 to rotate, so that the cut pieces can flow between each workstation;

[0061] The inspection station 4 is equipped with a visual inspection device, including an image acquisition unit, an image processing unit, and a control unit. The inspection head of the image acquisition unit is located above the inspection plate 1 and includes a first camera 41, a second camera 42, and a third camera 43. The first camera 41 and the second camera 42 are used to acquire the first hole position image and the second hole position image of the two processing areas on the cut piece, respectively. The third camera 43 is used to acquire the third hole position image of the cut piece splicing area. The image processing unit is used to process and analyze the received first hole position image, second hole position image, and third hole position image, and to determine whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards. The control unit is used to control the flow direction of the cut piece according to the analysis results of the image processing unit, so that qualified products are transferred to the finished product station 5, and unqualified products are transferred to the scrap station 6.

[0062] In this invention, the inspection tray 1 is equipped with four support platforms 2, and the four support platforms 2 are respectively arranged in a one-to-one correspondence with the feeding station 3, the inspection station 4, the finished product station 5, and the scrap station 6. When the support platform 2 of the inspection tray 1 rotates to the feeding station 3, the cut pieces are fed onto the support platform 2; after the feeding is completed, the inspection tray 1 starts to rotate, transferring the cut pieces on the support platform 2 to the inspection station 4. After the cut piece arrives at inspection station 4, the image acquisition unit acquires images of the cut piece, obtaining images of the hole positions in various areas of the cut piece. The image processing unit processes and analyzes the acquired images and determines whether the hole spacing and hole diameter meet the preset quality standards. If the hole spacing of the cut piece meets the quality standards, the inspection disc 1 continues to rotate, transferring the qualified cut piece to the finished product station 5. At the finished product station 5, the qualified cut piece is transferred to the next process via a conveying device. If the hole spacing of the cut piece does not meet the quality standards, the inspection disc 1 continues to rotate, transferring the unqualified cut piece to the scrap station 6. At the scrap station 6, the unqualified cut piece is conveyed to the recycling area via a conveying device.

[0063] The present invention limits the position of the cut piece on the detection plate 1 by setting the support platform 2, ensuring that the cut piece is always within the detection range of the image acquisition unit; and uses multiple cameras to simultaneously acquire multiple areas of the cut piece, which can fully cover multiple areas of the cut piece and avoid the occurrence of missed detection. The acquired images are processed and analyzed by the image processing unit, which can more accurately determine whether the hole spacing meets the quality standard, thus improving the accuracy and completeness of the detection results.

[0064] This invention integrates the feeding, inspection, finished product conveying, and waste product conveying stations onto a single inspection disc 1, forming a complete automated production cycle line. The inspection disc 1 is rotated by the drive component 7, enabling the automatic flow of cut pieces between the stations, reducing manual intervention and improving the automation level of inspection. Furthermore, the control unit automatically controls the flow direction of the cut pieces based on the analysis results of the image processing unit, which can quickly and accurately separate qualified and unqualified products, avoiding human error and ensuring the quality of the final product.

[0065] The image processing unit in this invention includes an image preprocessing module, a hole location recognition module, and a data analysis module;

[0066] The image preprocessing module is used to perform grayscale conversion, binarization, and noise reduction on the acquired first and second hole images in sequence.

[0067] The hole location recognition module is used to identify the center coordinates of the hole locations in the preprocessed image;

[0068] The data analysis module is used to calculate the hole spacing within the area and the hole spacing in the splicing area based on the center coordinates of the hole positions, and compare it with the preset standard hole spacing to determine whether the hole spacing is qualified.

[0069] In the image preprocessing module, the color image is converted into a grayscale image to reduce the amount of data and simplify subsequent processing steps; the grayscale image is converted into a binary image, and the pixels in the image are divided into background and target regions by setting a threshold; and a filtering algorithm is used to remove noise from the image and improve image quality.

[0070] In the hole location recognition module, the Hough transform algorithm is used to detect circular features in the image to determine the location of the hole. By setting the minimum and maximum radius range of the circle, the center coordinates of the hole are proposed. The hole location recognition module can output the center coordinates (x, y) of each hole and mark the boundary of the hole.

[0071] In the data analysis module, the Euclidean distance formula is used to calculate the hole spacing, and the calculation results are compared with the preset standard hole spacing, which is 5.0 mm with a tolerance range of ±0.2 mm.

[0072] To ensure the quality of the cut pieces, when judging the hole spacing, it is necessary to assess not only the spacing of individual holes but also the overall consistency of the hole spacing across the cut pieces. Specifically:

[0073] For judging the spacing of a single hole: the calculated spacing of each hole is compared with the preset minimum and maximum spacing. If the spacing of a hole exceeds the allowable range, the cut piece does not meet the quality standard.

[0074] For overall consistency assessment: Calculate the average and standard deviation of all hole spacings to evaluate the consistency of hole spacing. If the average is within the allowable range and the standard deviation is small, that is, the hole spacing is uniformly distributed, then the cut piece meets the quality standard; otherwise, the cut piece does not meet the quality standard.

[0075] The visual inspection device of the present invention also includes a light source device 44; the light source device 44 adopts a ring light source, a strip light source, or a combination of both.

[0076] The ring light source is positioned around the image acquisition unit to uniformly illuminate the test area of ​​the cut piece, ensuring that the image acquisition unit can acquire a clear image. The strip light source is positioned on the side or above the cut piece to provide directional illumination and highlight the hole features on the surface of the cut piece. The combination of the ring light source and the strip light source, by adjusting their brightness and angle, can achieve multi-angle and multi-level illumination of the cut piece to adapt to the detection needs of different cut piece materials and hole features.

[0077] Both the ring light source and the strip light source use high-brightness LED light sources, which can provide uniform and stable lighting conditions. The brightness and angle of the light source can be adjusted according to the material and color of the cut piece to ensure the best image acquisition effect.

[0078] In a preferred embodiment of the present invention, the image acquisition unit further includes a support column 45, an acquisition mounting base 46, and a linear module 47. The support column 45 supports the entire image acquisition unit and provides sufficient height to cover the detection area of ​​the cut piece. The acquisition mounting base 46 is used to mount the first camera 41, the second camera 42, and the third camera 43; the linear module 47 is disposed between the side wall of the support column 45 and the acquisition mounting base 46.

[0079] The moving path of the linear module 47 is set along the parallel direction of the first processing area and the second processing area on the cut piece. The acquisition mounting base 46 can move along the preset path on the linear module 47 to adjust the acquisition area of ​​the third camera 43 on the cut piece to cover the corresponding splicing area.

[0080] By moving the linear module 47, the acquisition mounting base 46 can flexibly adjust the coverage area of ​​the third camera 43 in the splicing area of ​​the cut pieces. This dynamic adjustment capability ensures that the hole position images in the splicing area are acquired comprehensively and without omission, enabling the detection device to be applicable to cut pieces of different sizes and shapes, thus improving the flexibility and versatility of the detection. In addition, through the rapid movement of the linear module 47, the third camera 43 can quickly locate the splicing area, reducing the adjustment time before detection and improving the efficiency of the entire detection process.

[0081] Furthermore, the installation angles of the first camera 41, the second camera 42, and the third camera 43 can be adjusted according to the surface characteristics of the cut piece and the detection requirements: Specifically, when the surface of the cut piece is relatively flat and the hole positions are evenly distributed, all three cameras are set perpendicular to the surface of the cut piece to ensure the accuracy of image acquisition and the reliability of measurement, but are not limited to the form of vertical arrangement; when the surface of the cut piece has a certain curvature or unevenness, or when it is necessary to detect the side features of the cut piece, the cameras are set at a certain angle to ensure the accuracy of image acquisition and the reliability of measurement.

[0082] In a preferred embodiment of the present invention, the support platform 2 includes a base 21, a limiting seat 22, and a conveying assembly 23. The base 21 is fixed on the detection disk 1. The conveying assembly 23 includes a drive roller 231, a driven roller 232, a conveyor belt 233, and a drive motor 234. Both ends of the drive roller 231 and the driven roller 232 are fixed on the base 21 through bearing seats. The conveyor belt 233 wraps around the drive roller 231 and the driven roller 232. The limiting seat 22 is located between the drive roller 231 and the driven roller 232. The two sides protruding along the width direction of the conveyor belt 233 are fixed on the base 21. The top and bottom surfaces of the limiting seat 22 are provided with grooves for the conveyor belt 233 to pass through.

[0083] When the inspection disc 1 rotates to the position where the support platform 2 corresponds to the feeding station 3, the finished product station 5, or the scrap station 6, the conveyor belt 233 on the support platform 2 can convey the cut pieces along the radial direction of the inspection disc 1.

[0084] In this preferred embodiment, each conveyor belt 233 on the support platform 2 is controlled by an independent drive motor 234, enabling bidirectional movement. During loading and unloading, the conveyor belt 233 can change its direction of movement as needed, achieving automatic loading and unloading of the cut pieces. During loading, the conveyor belt 233 moves towards the center of the detection disc 1, transferring the cut pieces from the loading station 3 to the support platform 2, ensuring smooth movement of the cut pieces during loading and conveying, and improving the positioning accuracy of the cut pieces on the support platform 2. After inspection, the conveyor belt 233 moves away from the center of the detection disc 1, transferring the cut pieces to the finished product station 5 or the scrap station 6, reducing the waiting time of the cut pieces between stations and improving production efficiency. In addition, the edges of the cut pieces are embedded in grooves, and the two sides of the grooves restrict the lateral movement of the cut pieces, playing a positioning role for the cut pieces entering the support platform 2.

[0085] Based on the above embodiment, a limiting plate 24 is provided at one end of the conveyor belt 233 near the center of the detection plate 1; and a proximity switch 25 is provided on the limiting plate 24 to control the position of the cut piece on the conveyor belt 233.

[0086] A clamping assembly 8 is provided above the conveyor belt 233. The clamping assembly 8 includes an eccentric roller and a servo motor for driving the eccentric roller to rotate. The two ends of the eccentric roller are fixed on the limit seat 22 by bearing seats.

[0087] The cut pieces on the loading station 3 enter the carrier platform 2 from the outer edge of the detection tray 1. At this time, the conveyor belt 233 synchronously conveys the cut pieces towards the center of the detection tray 1. The cut pieces are transferred from the conveyor device of the loading station 3 to the conveyor belt 233 on the carrier platform 2. When the cut pieces reach the sensing area of ​​the proximity switch 25, the proximity switch 25 sends a signal to the control system. The control system immediately stops the movement of the conveyor belt 233. When the cut pieces accurately stop in the collection area, the conveyor belt 233 stops moving. At this time, the servo motor drives the eccentric roller to rotate. The eccentric roller and the upper surface of the groove clamp the cut pieces and the conveyor belt 233 to prevent the cut pieces from being thrown out during the flow of the detection tray 1.

[0088] As a preferred embodiment of the above, the limiting seat 22 is provided with a negative pressure chamber 221, and a pressure sensor is provided in the negative pressure chamber 221 for real-time monitoring of the pressure of the negative pressure chamber 221; the upper surface of the limiting seat 22 corresponding to the groove is provided with a plurality of through holes 222, and the plurality of through holes 222 are connected to the negative pressure chamber 221.

[0089] The negative pressure chamber 221 is connected to an external vacuum pump via a pipe, which provides a stable negative pressure source. The opening and closing of the negative pressure is controlled by a control system. During the fabric piece transfer process, the control system automatically opens or closes the negative pressure based on the position and state of the fabric pieces, ensuring stable adsorption by the conveyor belt 233 and preventing fluctuations in the conveyor belt 233 that could affect the positional accuracy of the fabric pieces. When the fabric piece reaches the designated position, the control system closes the negative pressure and releases the conveyor belt 233. Furthermore, a pressure sensor is installed inside the negative pressure chamber 221 to monitor the magnitude of the negative pressure in real time. When the negative pressure falls below a set value, the control system automatically starts the vacuum pump to restore the negative pressure, ensuring stable adsorption by the conveyor belt 233. The negative pressure system also has an overpressure protection device; when the negative pressure exceeds the set safety range, the system automatically cuts off the power to the vacuum pump to prevent equipment damage.

[0090] In this invention, a feeding and conveying assembly 31 is provided at the loading station 3, and the conveying plane of the feeding and conveying assembly 31 is located above the detection plate 1. A guide plate 32 is provided at the outlet of the feeding and conveying assembly 31. The end of the guide plate 32 near the detection plate 1 is inclined downward, and the two side walls gradually converge inward along the conveying direction. The guide plate 32 is trapezoidal, and the two side walls gradually converge inward along the conveying direction to form a gradually narrowing channel. The guide plate receives the cut pieces on the feeding and conveying assembly 31 and transfers the received cut pieces to the conveyor belt 233 of the support platform 2, ensuring that the cut pieces can gradually align during the sliding process. The pre-positioning of the guide plate 32 ensures that the cut pieces are in the correct position and posture before being placed on the support platform 2.

[0091] In this invention, both the finished product station 5 and the scrap station 6 are equipped with material distribution and conveying components 51; the conveying planes of both material distribution and conveying components 51 are located below the detection plate 1, and a guide hopper 52 is provided between the detection plate 1 and the material distribution and conveying components 51. The design of the guide hopper 52 precisely guides the movement direction of the cut pieces, enabling the cut pieces to be smoothly transferred from the detection plate 1 to the material distribution and conveying components 51, avoiding deviation or jamming of the cut pieces during the transfer process, realizing continuous flow of cut pieces, and further improving production efficiency.

[0092] This invention also provides a method for detecting hole positions in large-format cut pieces using multi-view dual-region vision, employing a device for detecting hole positions in large-format cut pieces using multi-view dual-region vision, and including the following steps:

[0093] The cut piece to be inspected is placed on the conveyor at the loading station 3. The conveyor transfers the cut piece to the carrier platform 2 of the inspection tray 1 and ensures that the cut piece is correctly placed and fixed on the carrier platform 2.

[0094] Start the drive component 7 to drive the inspection plate 1 to rotate, and transfer the cut pieces on the support platform 2 to the inspection station 4;

[0095] When the cut piece arrives at inspection station 4, the image acquisition unit is activated. The first camera 41 and the second camera 42 acquire images of the two processing areas of the cut piece, respectively, to obtain the first hole image and the second hole image. The third camera 43 acquires images of the splicing area of ​​the cut piece to obtain the third hole image.

[0096] The image processing unit receives the first hole position image, the second hole position image, and the third hole position image, processes and analyzes them, and determines whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards.

[0097] Based on the analysis results of the image processing unit, the control unit determines whether the cut piece is qualified. If the cut piece is qualified, the control unit controls the detection plate 1 to continue rotating and transfer the cut piece to the finished product station 5. If the cut piece is unqualified, the control unit controls the detection plate 1 to transfer the cut piece to the scrap station 6.

[0098] The conveyor at finished product station 5 transports qualified cut pieces to subsequent production stages, while the conveyor at scrap station 6 transports unqualified cut pieces to the scrap collection area.

[0099] The detection method of this invention, through the setup of the detection disc 1 and the application of multi-view vision technology, achieves high-precision detection, automated transfer, and efficient classification of cut pieces. This method not only improves detection accuracy and reliability but also significantly enhances detection efficiency, optimizes the production process, saves space, and improves product quality.

[0100] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-view dual-region hole position detection device for large-format cut pieces, characterized in that, include: The system includes a detection disc, a drive assembly, and a feeding station, a detection station, a finished product station, and a scrap station arranged sequentially along the circumference of the detection disc. The inspection tray has multiple support platforms for carrying the cut pieces, and the driving component supports and drives the inspection tray to rotate, so that the cut pieces can flow between various workstations; The inspection station is equipped with a visual inspection device, including an image acquisition unit, an image processing unit, and a control unit; The detection head of the image acquisition unit is located above the detection disk and includes a first camera, a second camera and a third camera. The first camera and the second camera are used to acquire the first hole position image and the second hole position image of the two processing areas on the cut piece, respectively. The third camera is used to acquire the third hole position image of the cut piece splicing area. The image processing unit is used to process and analyze the received first hole image, second hole image and third hole image, and to determine whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards. The control unit controls the flow direction of the cut pieces based on the analysis results of the image processing unit, so that qualified products are transferred to the finished product station and unqualified products are transferred to the scrap station. The image acquisition unit further includes: Support columns are used to support the entire image acquisition unit; A data acquisition mounting bracket is used to mount the first camera, the second camera, and the third camera; A linear module is disposed between the support column and the acquisition mounting base; The linear module's movement path is set along the parallel direction of the first and second processing areas on the cut piece. The acquisition mounting base can move along a preset path on the linear module to adjust the third camera's acquisition area on the cut piece to cover the corresponding splicing area. The support platform includes: The base is fixed on the detection plate; The conveying assembly includes a drive roller, a driven roller, a conveyor belt, and a drive motor. Both ends of the drive roller and the driven roller are fixed to the base via bearing seats, and the conveyor belt is wrapped around the drive roller and the driven roller. A limiting seat is located between the driving roller and the driven roller, and its two protruding sides along the width direction of the conveyor belt are fixed to the base. The top and bottom surfaces of the limiting seat are provided with grooves for the conveyor belt to pass through, and the conveyor belt on the support platform can convey the cut piece along the radial direction of the detection disc. A limiting plate is provided at one end of the conveyor belt near the center of the detection disc; A proximity switch is provided on the limiting plate to control the position of the cut piece on the conveyor belt; A clamping assembly is provided above the conveyor belt. The clamping assembly includes an eccentric roller and a servo motor for driving the eccentric roller to rotate. The two ends of the eccentric roller are fixed on the limiting seat by bearing seats.

2. The multi-view dual-region hole position detection device for large-format cut pieces according to claim 1, characterized in that, The image processing unit includes an image preprocessing module, a hole location recognition module, and a data analysis module; The image preprocessing module is used to perform grayscale conversion, binarization and noise reduction on the acquired first hole image, second hole image and third hole image in sequence. The hole location recognition module is used to identify the center coordinates of the hole location in the preprocessed image; The data analysis module is used to calculate the hole spacing within the region and the hole spacing in the splicing region based on the center coordinates of the hole positions, and compare it with the preset standard hole spacing to determine whether the hole spacing is qualified.

3. The multi-view dual-region hole position detection device for large-format cut pieces according to claim 1, characterized in that, The visual inspection device also includes a light source device; The light source device adopts a ring light source, a strip light source, or a combination of both.

4. The multi-view dual-region hole position detection device for large-format cut pieces according to claim 1, characterized in that, The limiting seat is provided with a negative pressure chamber, and a pressure sensor is installed in the negative pressure chamber to monitor the pressure of the negative pressure chamber in real time. The limiting seat has several through holes on the upper surface corresponding to the groove, and the several through holes are connected to the negative pressure cavity.

5. The multi-view dual-region hole position detection device for large-format cut pieces according to claim 1, characterized in that, A feeding and conveying assembly is provided at the loading station, and the conveying plane of the feeding and conveying assembly is located above the detection plate; A guide plate is provided at the outlet of the feeding and conveying assembly. The end of the guide plate near the detection plate is inclined downward and gradually converges inward along the two side walls along the conveying direction.

6. The multi-view dual-region hole position detection device for large-format cut pieces according to claim 1, characterized in that, Both the finished product station and the waste product station are equipped with material distribution and conveying components; The conveying planes of both material dispensing and conveying components are located below the detection disc, and a guide hopper is provided between the detection disc and the material dispensing and conveying components.

7. A method for detecting hole positions in large-format cut pieces using multi-view dual-region vision, employing the multi-view dual-region hole position detection device for large-format cut pieces as described in any one of claims 1-6, characterized in that... Includes the following steps: Place the cut piece to be inspected on the conveyor at the feeding station. The conveyor will transport the cut piece to the carrier platform of the inspection tray and ensure that the cut piece is correctly placed and fixed on the carrier platform. The drive component starts, causing the inspection tray to rotate and transferring the cut pieces on the carrier table to the inspection station; When the cut piece arrives at the inspection station, the image acquisition unit is activated. The first and second cameras acquire images of the two processing areas of the cut piece, respectively, to obtain the first hole image and the second hole image. The third camera acquires images of the splicing area of ​​the cut piece to obtain the third hole image. The image processing unit processes and analyzes the received first hole position image, second hole position image and third hole position image, and determines whether the hole spacing in the processing area and the hole spacing in the splicing area meet the preset quality standards. Based on the analysis results of the image processing unit, the control unit determines whether the cut piece is qualified. If the cut piece is qualified, the control unit controls the detection plate to continue rotating and transfers the cut piece to the finished product station. If the cut piece is unqualified, the control unit controls the detection plate to transfer the cut piece to the scrap station. The conveyor at the finished product station transports qualified cut pieces to subsequent production stages, while the conveyor at the scrap station transports unqualified cut pieces to the scrap collection area.

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