CN-116718617-B - Integrated circuit board vision detection system and detection method

Abstract

The invention discloses an integrated circuit board visual detection system which comprises a first linear conveyor belt unit and a visual detection camera bellows, wherein one end of a conveying path of the first linear conveyor belt unit is a circuit board feeding part to be detected, and a circuit board turn-over mechanism is arranged at the other end of the conveying path of the first linear conveyor belt unit.

Inventors

• YANG LINGLING
• CHENG YONGZHI
• HE QIONG
• LIU XINLING
• YANG ZHIYUN
• FU HOUKUI
• YOU JIAFA

Assignees

• 武汉软件工程职业学院(武汉开放大学)

Dates

Publication Date

20260512

Application Date

20230530

Claims (2)

1. 1. The integrated circuit board visual detection system is characterized by comprising a first linear conveyor belt unit (6) and a visual detection camera bellows (16), wherein one end of a conveying path of the first linear conveyor belt unit (6) is a circuit board feeding part (15) to be detected, and a circuit board turn-over mechanism (17) is arranged at the other end of the conveying path of the first linear conveyor belt unit (6); The first linear conveyor belt unit (6) passes through the visual inspection camera (16) through a conveyor belt passing port (14) at the side part of the visual inspection camera, a visual camera (24) with a downward lens (25) is arranged in the visual inspection camera (16), and when the first linear conveyor belt unit (6) conveys the circuit board (8) to be inspected into the visual inspection camera (16), the visual camera (24) can completely shoot the pattern on the upper surface of the circuit board (8) to be inspected; The inner side of the end part of the first linear conveyor belt unit (6) is tensioned with a conveyor belt end roller (30), and the driving rotation transfer toward of the conveyor belt end roller (30) enables the first linear conveyor belt unit (6) to perform linear conveying movement; The section of the conveyor belt of the first linear conveyor belt unit (6) where the conveyor surface is located is denoted as a linear conveyor section (6.1), the section of the conveyor belt of the first linear conveyor belt unit (6) where the semicircular arc crosses the conveyor belt end roller (30) is denoted as a conveyor belt circular arc section (6.2), and the extrados of the conveyor belt circular arc section (6.2) is tangential to the conveyor surface of the linear conveyor section (6.1); The circuit board turnover mechanism (17) comprises an a motor (20), wherein an output shaft of the a motor (20) is an a rotating shaft (12), the axis of the a rotating shaft (12) is overlapped with the axis of a roller (30) at the end part of the conveyor belt, the circuit board turnover mechanism also comprises a wheel shaft (22) parallel to the a rotating shaft (12), one end of the wheel shaft (22) is mutually fixed with the a rotating shaft (12) through an a rocker arm (13), a rolling wheel (7) is coaxially and rotatably arranged outside the wheel shaft (22) through a bearing (21), and the outer ring of the rolling wheel (7) is an elastic rolling surface (7.1); When the rolling wheel (7) is parallel to the position right above the roller (30) at the end part of the conveyor belt, a gap between the elastic rolling surface (7.1) and the circular arc section (6.2) of the conveyor belt just passes through the circuit board (8) to be detected right; A section of the gap between the elastic rolling surface (7.1) and the circular arc section (6.2) of the conveyor belt, which is penetrated rightward by the horizontal circuit board (8) to be detected, is marked as a circuit board penetrating section (8.1), at the moment, if the rotating shaft (12) slowly rotates clockwise, the elastic rolling surface (7.1) of the rolling wheel (7) is driven to roll clockwise along the circular arc path of the circular arc section (6.2) of the conveyor belt, so that the elastic rolling surface (7.1) of the rolling wheel (7) gradually rolls the circuit board penetrating section (8.1), the circuit board penetrating section (8.1) gradually and forcedly clings to the circular arc section (6.2) of the conveyor belt, and then one end, far away from the circuit board penetrating section (8.1), of the circuit board (8) to be detected is lifted upwards, and an included angle a is formed between the lifted circuit board (8) to be detected and the linear conveying section (6.1) when the circuit board penetrates the end of the circular arc section (8.1); The circuit board turnover mechanism (17) further comprises a b motor (18), an output shaft of the b motor (18) is recorded as a b rotating shaft (10), the b rotating shaft (10) is parallel to the a rotating shaft (12), the b rotating shaft (10) is higher than a surface where the linear conveying section (6.1) is located, the b rotating shaft (10) is fixedly connected with a clamping unit (9) through a b rocker arm (11), an elastic rolling surface (7.1) of the rolling wheel (7) rolls on the end of the circuit board penetrating section (8.1), when an included angle a is formed between the tilted circuit board (8) to be detected and the linear conveying section (6.1), the b rotating shaft (10) can drive the clamping unit (9) through the b rocker arm (11) to move to the lower side of one end of the tilted circuit board (8) to be detected far away from the circuit board penetrating section (8.1), and the clamping unit (9) clamps one end of the tilted circuit board (8) to be detected far away from the circuit board penetrating section (8.1).
2. 2. The method for inspecting an integrated circuit board vision inspection system of claim 1, wherein: Firstly, placing a circuit board (8) at a feeding part (15) of the circuit board to be detected; Step two, the circuit board (8) is conveyed to the right in a vision detection camera bellows (16) and the front vision of the circuit board (8) is detected; Continuing to convey the circuit board (8) rightward until the right end of the circuit board (8) to be detected passes through a gap between the elastic rolling surface (7.1) and the circular arc section (6.2) of the conveyor belt rightward; Step four, the rotating shaft (12) rotates clockwise, and the elastic rolling surface (7.1) of the rolling wheel (7) rolls the circuit board passing section (8.1) to form an included angle a degree between the circuit board (8) to be detected and the linear conveying section (6.1); Fifthly, the rotating shaft (10) rotates anticlockwise, the rocker arm (11) drives the clamping unit (9) to rotate anticlockwise around the axis of the rotating shaft (10) until the tilted circuit board (8) to be detected is far away from the lower side of one end of the circuit board penetrating section (8.1), and the clamping unit (9) performs clamping action; Step six, the rotating shaft (12) continuously rotates clockwise, and the elastic rolling surface (7.1) of the rolling wheel (7) is separated from the end of the circuit board passing section (8.1); Seventhly, the rotating shaft (10) rotates anticlockwise, and the clamping unit (9) and the circuit board (8) rotate anticlockwise around the axis of the rotating shaft (10) as a whole until the circuit board (8) is parallel to the upper side of the linear conveying section (6.1); Step eight, controlling the clamping unit (9) to perform release action; And step nine, the first linear conveyor belt unit (6) conveys the circuit board (8) leftwards into the vision detection camera bellows (16) and performs vision detection on the reverse side of the circuit board (8).

Description

Integrated circuit board vision detection system and detection method Technical Field The invention belongs to the field of integrated circuit board detection. Background The principle of the visual inspection of the integrated circuit board is that the integrated circuit board to be inspected conveyed on the conveying belt is scanned and shot one by an industrial visual inspection camera, the surface pattern of the integrated circuit board is obtained, the visible structures such as the offset, the mutual spacing of parts, the size of the parts and the shape of the parts of the surface image of the integrated circuit board are analyzed and identified by the visual inspection system and are compared with the standard pattern, so that whether the integrated circuit board is qualified or not is judged, and the conventional visual inspection mode based on the one-by-one conveying of the linear conveying belt can only generally detect the front surface of the conveyed integrated circuit board and cannot detect the back surface of the integrated circuit board. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides an integrated circuit board visual detection system and a detection method, which can realize the detection of the front side and the back side of an integrated circuit board. The integrated circuit board visual detection system is characterized by comprising a first linear conveyor belt unit and a visual detection camera bellows, wherein one end of a conveying path of the first linear conveyor belt unit is a circuit board feeding part to be detected, and a circuit board turn-over mechanism is arranged at the other end of the conveying path of the first linear conveyor belt unit; the first linear conveyor belt unit passes through the visual inspection camera through a conveyor belt passing port at the side part of the visual inspection camera, a visual camera with a downward lens is arranged in the visual inspection camera, and when the first linear conveyor belt unit conveys the circuit board to be inspected into the visual inspection camera, the visual camera can completely shoot the pattern on the upper surface of the circuit board to be inspected. Further, the inner side of the end of the first linear conveyor unit is tensioned with a conveyor end roller, and the driving rotation transfer toward of the conveyor end roller enables the first linear conveyor unit to perform linear conveying motion. Further, a section of the conveyor belt of the first linear conveyor unit, where the conveyor surface of the conveyor belt is located, is denoted as a linear conveyor section, and a section of the conveyor belt of the first linear conveyor unit, where the semicircular arc of the conveyor belt crosses the roller at the end of the conveyor belt, is denoted as a conveyor arc section, where the extrados of the conveyor arc section is tangential to the conveyor surface of the linear conveyor section. The circuit board turnover mechanism comprises an a motor, an axle, a rolling wheel, a bearing, a rolling wheel and an elastic rolling surface, wherein the output shaft of the a motor is an a rotating shaft, the axis of the a rotating shaft is overlapped with the axis of the roller at the end part of the conveyor belt, the axle is parallel to the a rotating shaft, one end of the axle is mutually fixed with the a rotating shaft through the a rocker arm, the rolling wheel is coaxially arranged outside the axle through the bearing, and the outer ring of the rolling wheel is an elastic rolling surface. Further, when the rolling wheel is parallel to the position right above the roller at the end part of the conveyor belt, the gap between the elastic rolling surface and the circular arc section of the conveyor belt just passes through the circuit board to be detected right. Further, a section of the horizontal circuit board to be detected, which passes through the gap between the elastic rolling surface and the circular arc section of the conveyor belt to the right, is recorded as a circuit board passing section, and at the moment, if the rotating shaft a slowly rotates clockwise, the elastic rolling surface of the rolling wheel is driven to roll clockwise along the circular arc path of the circular arc section of the conveyor belt, so that the elastic rolling surface of the rolling wheel gradually rolls the circuit board passing section, the circuit board passing section gradually and forcedly clings to the circular arc section of the conveyor belt, further, one end of the circuit board to be detected, far away from the circuit board passing section, is lifted upwards, and when the elastic rolling surface of the rolling wheel rolls to the end of the circuit board passing section, an included angle a is formed between the lifted circuit board to be detected and the linear conveying section. The circuit board turnover mechanism comprises a motor, an output shaft of the motor is a