Fluorescent powder coating surface defect detecting system and method based on machine vision

Abstract

The invention provides a fluorescent powder coating surface defect detecting system and a detecting method based on machine vision. The system comprises a laser emitter, an image collecting terminal, an image sensor servo motor adjusting module, and an upper position personal computer (PC). The image collecting terminal comprises an image sensor, a vision processing and controlling module, and an interface module, wherein the image sensor, the vision processing and controlling module, and the interface module are connected in succession, the upper position PC is connected with the vision processing and controlling module through the interface module, the image sensor servo motor adjusting module is respectively connected with the vision processing and controlling module and the image sensor, and the laser emitter is connected with the vision handling and controlling module. A laser triangulation method is adopted to detect the defects that a fluorescent powder coating is too thick and too thin, and thickness is not even. The system collects fluorescent powder coating images which are coated to be compared with a standard image template, and therefore the defects that the fluorescent powder coating is irregular, stuck with glue and foreign matters and the like are detected. The system is simple in structure, low in cost, high in detection speed, and high in detection precision.

Description

technical field [0001] The invention relates to the field of object surface defect detection in the precision electronic packaging process, in particular to a machine vision-based fluorescent powder coating surface defect detection system and method in the precision electronic packaging process. Background technique [0002] The core process of the high-power LED blue-white light conversion packaging process includes phosphor coating and plastic molding, and the phosphor coating process is the most technically difficult key process. As one of the key processes to realize the conversion of LED blue light to white light, phosphor coating directly affects LED luminous efficiency and light uniformity. In order to improve the light and color quality of LEDs, the requirements for the control of the coating surface, coating uniformity and coating thickness are getting higher and higher. At present, the surface quality inspection of phosphor coating coatings mainly adopts the metho...

AI Technical Summary

Problems solved by technology

However, these defect detections mainly focus on the detection of defects such as surface scratches, cracks, and collapses, and there is almost no research from the perspective of coating thickness uniformity.

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