PCB (printed circuit board) component detection system and method based on machine vision
A technology of machine vision and detection system, applied in instruments, measuring devices, scientific instruments, etc., can solve the problem that it is not easy to judge whether the polarity is correct or not.
Pending Publication Date: 2017-02-01
ZHEJIANG SCI-TECH UNIV +1
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[0005] The above two patents use the method of template matching to compare the components to be detected, which is more suitable for the detection of the existence of components, but for some components with relatively small polarity differences, it is not easy to judge whether the polarity is correct
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[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0052] Component inspection system on PCB based on machine vision, including image acquisition system and image processing system. The image processing system is a computer.
[0053] Such as figure 1 As shown, the image acquisition system includes a camera 201, a cylinder 203, a top support 207, a side support 208, a box light source 209, a tray 210, a base 211, a first switch 212, a second switch 214 and a third switch 213; the camera 201 Fixed on the camera fixing plate 202, the camera fixing plate 202 is fixed on the top of the top bracket 207, and the box-type light source 209 is fixed on the bottom of the top bracket 207; the camera 201 is arranged at the center of the box-type light source 209; the top bracket 207 is fixed on both sides On the upper bracket 208, the side bracket 208 is fixed on the base 211; four cylinders 203 are arranged in th...
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The invention discloses a PCB (printed circuit board) component detection system and method based on machine vision. Components to be detected are compared by a template matching method, and whether polarity of the components with small polarity difference is correct or not is not easily judged. The system comprises an image acquisition system and an image processing system. The component detection method includes the steps: building an image processing template according to acquired template PCB images by the image acquisition system; detecting PCBs to be detected, and reading parameter information of components to be detected in template PCBs; acquiring images of the PCBs to be detected by the image acquisition system; sequentially detecting components on the PCBs to be detected according to parameter information of selected components in the template PCBs until all the PCBs to be detected are detected. The detection method is richer, can detect whether components with movable positions and uncertain display shapes on images exist or not, whether colors are right or not, and can detect the components which are easy to misplug in direction.
Description
technical field [0001] The invention belongs to the technical field of PCB detection, in particular to a system and method for detecting components on a PCB based on machine vision. Background technique [0002] In modern electronic equipment and electronic products, printed circuit board occupies an important position. It is a carrier for integrating and installing various electronic components, and has been widely used in various fields. However, in the production process, how to improve the product quality in the intermediate process and how to reduce the scrap rate are the goals that all circuit board manufacturers have been pursuing relentlessly. Therefore, the PCB industry urgently needs online testing. [0003] However, for a long time, the detection of PCB components is usually done manually. This kind of detection not only consumes manpower, material resources and time, but also is very prone to missed detection and false detection. Various detection errors are ca...
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IPC IPC(8): G01N21/956G01R31/309
CPCG01N21/956G01R31/309G01N2021/95638
Inventor 包晓敏全正相杨晓城苏玮
Owner ZHEJIANG SCI-TECH UNIV