An optical character recognition (OCR) detection system

Abstract

The utility model discloses a kind of glass character recognition OCR detection systems, comprising: rack, mounting bracket, a pair of cleaning mechanism and mechanical gripper, rack top is equipped with the conveyor belt for carrying and conveying glass panel, rack inside is equipped with the driving mechanism of driving conveyor belt operation;Mounting bracket is fixed to rack top, and mounting bracket is installed on the OCR detection module for identifying glass panel character, a pair of cleaning mechanism is arranged along the conveying direction of conveyor belt with interval, and cleaning mechanism includes mounting plate, cleaning roller, connecting block and mounting rod.The utility model is integrated with automatic cleaning function before detection, dust on the surface of glass is effectively removed using cleaning roller, avoids the OCR misjudgment or missing judgment caused by dirt interference, greatly improves the reliability and accuracy of detection, in addition, cleaning roller is through the rotation structure of pivot, connecting block and mounting rod, can adapt to the thickness and position of glass panel, fits formula rolling cleaning, dust removal is more thorough.

Description

Technical Field

[0001] This utility model relates to the field of glass inspection, and in particular to a character recognition OCR inspection system on glass. Background Technology

[0002] In the glass manufacturing and processing industry, such as in the production of mobile phone cover plates, automotive glass, and home appliance panels, it is common practice to screen print, laser engrave, or inkjet print on the glass surface to mark information such as brand, model, specifications, or serial number. To ensure the accuracy and integrity of these printed characters, automated visual inspection using OCR (Optical Character Recognition) technology has become a crucial production step.

[0003] During the production and transportation process, glass panels are prone to absorbing dust, debris and other contaminants. Currently, traditional OCR inspection systems lack a pre-cleaning mechanism. These contaminants can obscure character details and interfere with image acquisition quality, leading to misjudgments or missed judgments by the OCR inspection module. This seriously affects the reliability of the inspection results, resulting in the waste of qualified products or the entry of unqualified products into the market.

[0004] Therefore, a character recognition OCR detection system on glass is proposed to address the above problems. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a glass character recognition OCR detection system. By integrating an automatic cleaning function before detection, the cleaning roller effectively removes dust from the glass surface, avoiding OCR misjudgments or omissions caused by dirt interference, and greatly improving the reliability and accuracy of detection. In addition, the cleaning roller, through the rotation structure of the rotating shaft, connecting block and mounting rod, can adapt to the thickness and position of the glass panel, and perform close-fitting rolling cleaning, so that dust is removed more thoroughly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a glass character recognition OCR detection system, comprising: a frame, a mounting frame, a pair of cleaning mechanisms, and a mechanical gripper. A conveyor belt for carrying and transporting glass panels is installed on the top of the frame, and a drive mechanism for driving the conveyor belt is provided inside the frame. The mounting frame is fixed to the top of the frame, and an OCR detection module for recognizing characters on the glass panel is installed on the mounting frame. The pair of cleaning mechanisms are arranged at intervals along the conveying direction of the conveyor belt. Each cleaning mechanism includes a mounting plate, a cleaning roller, a connecting block, and a mounting rod. The mounting plate is fixedly connected to the top of the frame. A rotating shaft is fixedly connected to one side of the connecting block, and the rotating shaft rotatably engages with the mounting plate. One end of the mounting rod is rotatably connected to the other side of the connecting block. The cleaning roller is detachably sleeved on the outer wall of the mounting rod. The mechanical gripper is located on one side of the frame and is used to receive the non-compliance signal from the OCR detection module and transfer non-compliance glass panels.

[0007] Preferably, the cleaning roller has a hollow structure, and an inner sleeve is fixedly connected inside the cleaning roller. The inner sleeve is movably fitted onto the outer wall of the mounting rod, and a stop block for restricting the axial movement of the inner sleeve is fixedly connected to the end of the mounting rod away from the connecting block.

[0008] Preferably, the outer side wall of the mounting rod is provided with a positioning groove along its length, the inner sleeve is provided with a through hole adapted to the mounting rod, the inner wall of the through hole is provided with a positioning block that engages with the positioning groove, and the positioning groove and the positioning block form a key connection structure.

[0009] Preferably, the cleaning mechanism further includes a fastening nut, the outer peripheral surface of the end of the mounting rod is provided with an external thread, the fastening nut is threadedly connected to the external thread, and the end face of the fastening nut abuts against the end face of the inner sleeve.

[0010] Preferably, the surface of the conveyor belt is provided with anti-slip texture.

[0011] Preferably, it further includes a dust collection mechanism for collecting cleaning dust, the dust collection mechanism including a vacuum cleaner, a dust hood and a connecting tube, the dust hood being fixed to the top of the frame and located between a pair of cleaning mechanisms, and the two ends of the connecting tube being sealed to the vacuum cleaner and the dust hood respectively.

[0012] Preferably, the outer peripheral wall of the cleaning roller is covered with an elastic cleaning layer, which is a sponge layer or a rubber fluff layer.

[0013] The beneficial effects of this utility model are:

[0014] By integrating an automatic cleaning function before inspection, the cleaning roller effectively removes dust from the glass surface, avoiding OCR misjudgments or missed judgments caused by dirt interference, greatly improving the reliability and accuracy of inspection. In addition, the cleaning roller, through the rotating structure of the shaft, connecting block and mounting rod, can adapt to the thickness and position of the glass panel, and perform close-fitting rolling cleaning, making dust removal more thorough. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the cleaning mechanism of this utility model;

[0018] Figure 4 This is an exploded structural diagram of the cleaning mechanism of this utility model.

[0019] In the diagram: 1. Frame; 2. Conveyor belt; 3. Mounting bracket; 4. OCR detection module; 5. Cleaning mechanism; 51. Mounting plate; 52. Cleaning roller; 53. Connecting block; 54. Rotary shaft; 55. Mounting rod; 56. Stop block; 57. Positioning groove; 58. External thread; 59. Fastening nut; 510. Inner sleeve; 6. Dust collection mechanism; 61. Vacuum cleaner; 62. Dust collection hood; 63. Connecting pipe. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0021] See appendix Figures 1 to 4As shown, a glass character recognition OCR detection system includes: a frame 1, a mounting frame 3, a pair of cleaning mechanisms 5, and a mechanical gripper. A conveyor belt 2 for carrying and transporting glass panels is installed on the top of the frame 1. A drive mechanism for driving the conveyor belt 2 is provided inside the frame 1. The mounting frame 3 is fixed to the top of the frame 1, and an OCR detection module 4 for recognizing characters on the glass panel is installed on the mounting frame 3. The pair of cleaning mechanisms 5 are arranged at intervals along the conveying direction of the conveyor belt 2. The cleaning mechanism 5 includes a mounting plate 51, a cleaning roller 52, a connecting block 53, and a mounting rod 55. The mounting plate 51 is fixedly connected to the top of the frame 1. A rotating shaft 54 ​​is fixedly connected to one side of the connecting block 53. The rotating shaft 54 ​​is rotatably engaged with the mounting plate 51. One end of the mounting rod 55 is rotatably connected to the other side of the connecting block 53. The cleaning roller 52 is detachably sleeved on the outer side wall of the mounting rod 55. The mechanical gripper is set on one side of the frame 1 and is used to receive the unqualified signal from the OCR detection module 4 and transfer the unqualified glass panel.

[0022] In this embodiment, the glass panel to be inspected is placed on the conveyor belt 2 manually or by a robotic arm. The drive mechanism is located inside the frame and its activation is not specifically shown. It drives the conveyor belt 2 to move forward at a constant speed, transporting the glass panel to the inspection area. During the transport process, the glass panel first passes through the cleaning mechanism 5. When the front end of the glass panel touches the cleaning roller 52, the cleaning roller 52 will be pushed due to friction. This pushing force forces the entire cleaning mechanism 5 to move in tandem. The mounting rod 55 and the connecting block 53 rotate upward together around the pivot 54. As a result, the cleaning roller 52 is lifted from its initial position and placed on the top surface of the glass panel. As the glass panel continues to move forward, the cleaning roller 52 rolls on the glass surface, removing dust, debris, and other contaminants. The cleaning process effectively removes dust from the glass surface, preventing OCR misjudgments or omissions caused by dirt interference, and greatly improving the reliability and accuracy of the detection. The cleaned glass panel is then conveyed directly below the OCR detection module 4. The OCR detection module 4 takes a picture or scans the glass surface to capture the printed or engraved characters. The image processing system analyzes the captured image, identifies the character content, and compares it with preset standard characters to determine whether the product is qualified. The detection results are transmitted to the control system in real time. If the detection is qualified, the glass panel continues to move forward with the conveyor belt 2 and enters the qualified product collection area. If the detection is unqualified, the system will trigger the mechanical gripper on one side to grab it from the conveyor belt 2 and transfer it to the unqualified product area.

[0023] The distance between the two cleaning units 5 is greater than the size of a single glass panel, thus enabling multiple cleaning cycles of the glass panel.

[0024] See appendix Figures 3 to 4As shown, the cleaning roller 52 has a hollow structure. An inner sleeve 510 is fixedly connected inside the cleaning roller 52. The inner sleeve 510 is movably sleeved on the outer wall of the mounting rod 55. A stop block 56 for limiting the axial movement of the inner sleeve 510 is fixedly connected to the end of the mounting rod 55 away from the connecting block 53. A positioning groove 57 is opened on the outer wall of the mounting rod 55 along its length. A through hole adapted to the mounting rod 55 is opened inside the inner sleeve 510. A positioning block that engages with the positioning groove 57 is provided on the inner wall of the through hole. The positioning groove 57 and the positioning block form a key connection structure. The cleaning mechanism 5 also includes a fastening nut 59. An external thread 58 is engraved on the outer circumferential surface of the end of the mounting rod 55. The fastening nut 59 is threadedly connected to the external thread 58, and the end face of the fastening nut 59 abuts against the end face of the inner sleeve 510.

[0025] In this embodiment, the cleaning roller 52 is detachably installed by fastening nut 59. When the cleaning roller 52 is worn or dirty, it can be easily replaced or cleaned, reducing the difficulty and time of equipment maintenance.

[0026] The positioning groove 57 and the positioning block cooperate to form a key connection, so as to achieve precise positioning of the cleaning roller 52 and the mounting rod 55, and ensure that the cleaning roller 52 and the inner sleeve 510 can rotate synchronously with the mounting rod 55 to prevent dry rotation.

[0027] See appendix Figures 1 to 2 As shown, the surface of conveyor belt 2 is provided with anti-slip texture.

[0028] In this embodiment, the anti-slip texture is used to increase the friction between the surface of the conveyor belt 2 and the glass, preventing the glass from slipping or shifting during transmission and ensuring accurate detection position.

[0029] See appendix Figures 1 to 2 As shown, it also includes a vacuuming mechanism 6 for collecting cleaning dust. The vacuuming mechanism 6 includes a vacuum cleaner 61, a vacuum hood 62 and a connecting pipe 63. The vacuum hood 62 is fixed to the top of the frame 1 and located between a pair of cleaning mechanisms 5. The two ends of the connecting pipe 63 are respectively sealed to the vacuum cleaner 61 and the vacuum hood 62.

[0030] In this embodiment, the vacuuming mechanism 6 works synchronously near the cleaning mechanism 5. The vacuum hood 62 is aimed at the glass surface area that has just been cleaned. The vacuum cleaner 61 generates negative pressure through the connecting pipe 63 to quickly suck away the dust swept up by the cleaning roller 52, preventing the dust from falling back onto the glass surface or contaminating the detection environment.

[0031] See appendix Figures 3 to 4 As shown, the outer peripheral wall of the cleaning roller 52 is covered with an elastic cleaning layer, which is a sponge layer or a rubber fluff layer.

[0032] Working principle:

[0033] The glass panel to be inspected is placed on conveyor belt 2 manually or by a robotic arm. The drive mechanism, located inside the frame (start not specifically shown), drives conveyor belt 2 forward at a constant speed, transporting the glass panel to the inspection area. During transport, the glass panel first passes through cleaning mechanism 5. When the front end of the glass panel touches cleaning roller 52, friction causes a pushing force on cleaning roller 52. This force compels the entire cleaning mechanism 5 to rotate, with mounting rod 55 and connecting block 53 rotating upwards around pivot 54. As a result, cleaning roller 52 is lifted from its initial position and placed on the top surface of the glass panel. As the glass panel continues to move forward, cleaning roller 52 rolls on the glass surface, wiping away dust, debris, and other contaminants. The cleaning process effectively removes dust from the glass surface, avoiding OCR misjudgments or omissions caused by dirt interference, greatly improving the reliability and accuracy of the detection. The cleaned glass panel is conveyed directly below the OCR detection module 4. The OCR detection module 4 takes pictures or scans the glass surface to capture the printed or engraved characters on it. The image processing system analyzes the captured image, identifies the character content, and compares it with preset standard characters to determine whether the product is qualified. The detection results are transmitted to the control system in real time. If the detection is qualified, the glass panel continues to move forward with the conveyor belt 2 and enters the qualified product collection area. If the detection is unqualified, the system will trigger the mechanical gripper on one side to grab it from the conveyor belt 2 and transfer it to the unqualified product area.

[0034] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A glass character recognition OCR detection system, characterized in that: include: A frame (1) is provided with a conveyor belt (2) for carrying and transporting glass panels on the top of the frame (1), and a drive mechanism for driving the conveyor belt (2) is provided inside the frame (1). Mounting bracket (3), which is fixed to the top of the frame (1), and an OCR detection module (4) for recognizing characters on the glass panel is mounted on the mounting bracket (3); A pair of cleaning mechanisms (5) are arranged at intervals along the conveying direction of the conveyor belt (2). Each cleaning mechanism (5) includes a mounting plate (51), a cleaning roller (52), a connecting block (53), and a mounting rod (55). The mounting plate (51) is fixedly connected to the top of the frame (1). A rotating shaft (54) is fixedly connected to one side of the connecting block (53). The rotating shaft (54) is rotatably engaged with the mounting plate (51). One end of the mounting rod (55) is rotatably connected to the other side of the connecting block (53). The cleaning roller (52) is detachably sleeved on the outer side wall of the mounting rod (55). A mechanical gripper is disposed on one side of the frame (1) and is used to receive the non-compliance signal from the OCR detection module (4) and transfer the non-compliance glass panel.

2. The OCR detection system for recognizing characters on glass according to claim 1, characterized in that: The cleaning roller (52) is hollow and has an inner sleeve (510) fixedly connected inside. The inner sleeve (510) is movably sleeved on the outer side wall of the mounting rod (55). The end of the mounting rod (55) away from the connecting block (53) is fixedly connected to a stop (56) for restricting the axial movement of the inner sleeve (510).

3. The OCR detection system for recognizing characters on glass according to claim 2, characterized in that: The outer side wall of the mounting rod (55) is provided with a positioning groove (57) along its length direction. The inner sleeve (510) is provided with a through hole that is adapted to the mounting rod (55). The inner wall of the through hole is provided with a positioning block that engages with the positioning groove (57). The positioning groove (57) and the positioning block form a key connection structure.

4. The OCR detection system for recognizing characters on glass according to claim 2, characterized in that: The cleaning mechanism (5) also includes a fastening nut (59), and the outer peripheral surface of the end of the mounting rod (55) is engraved with an external thread (58). The fastening nut (59) is threadedly connected to the external thread (58), and the end face of the fastening nut (59) abuts against the end face of the inner sleeve (510).

5. The OCR detection system for recognizing characters on glass according to claim 1, characterized in that: The surface of the conveyor belt (2) is provided with anti-slip texture.

6. The OCR detection system for recognizing characters on glass according to claim 1, characterized in that: It also includes a vacuuming mechanism (6) for collecting cleaning dust, the vacuuming mechanism (6) including a vacuum cleaner (61), a vacuum hood (62) and a connecting pipe (63), the vacuum hood (62) being fixed to the top of the frame (1) and located between a pair of cleaning mechanisms (5), and the two ends of the connecting pipe (63) being sealed to the vacuum cleaner (61) and the vacuum hood (62) respectively.

7. The OCR detection system for recognizing characters on glass according to claim 1, characterized in that: The outer peripheral wall of the cleaning roller (52) is covered with an elastic cleaning layer, which is a sponge layer or a rubber fluff layer.

Images