Machine vision-based method for horn voice coil wire recognition

Abstract

The invention discloses a horn voice coil welding wire recognition method based on machine vision, which comprises the following steps: S1. image acquisition: when a production line is started, imagesare acquired by a camera; 12) threshold judgment: the average pixel value of the acquired image is calculated to judge whether there is a product on the image; S3. image preprocessing: noise reduction, edge detection, contour area screening are carried out on the images of the products, and the center coordinates and radii of the product fitting circles are obtained by using the Hough circle detection function, which are recorded as K1 and R respectively; S4, area calculation: carrying out corrosion on the pretreated image, calculating the product outline area, setting the area threshold, andscreening to obtain the center coordinates K2, K3 of the two solder joints in the corresponding product; S5, image segmentation: calculating the midpoint coordinates K4 of the center coordinates of the two solder joints, and segmenting the image obtained in the step S3 with a straight line K1K4; S6, obtaining the coordinates of the weld line: based on the center coordinate K1 of the circle and the radius R, a circle with the radius increased by a fixed step size is generated and intersected with the segmented image to obtain all the coordinates on the weld line.

Description

technical field [0001] The present invention relates to the technical field of image processing and recognition, and more specifically, to a method for recognizing welding wires of a voice coil of a speaker based on machine vision. Background technique [0002] With the continuous development of the economy and the continuous expansion of market demand, mobile phones, cars and their peripheral products have become mainstream fast-moving consumer goods, among which audio speakers are also one of the indispensable accessories. In the manufacturing process of car or mobile phone speakers, the voice coil wire Glue dispensing is one of the important process links. Existing speaker manufacturers, including Fengda, the world's largest speaker manufacturer, and domestic Edifiers use hand-held glue guns to control dispensing in this important link, and the glue that is dispensed has an unpleasant smell and is harmful to the health of workers. . On the other hand, workers repeat hig...

AI Technical Summary

Problems solved by technology

Existing speaker manufacturers, including Fengda, the world's largest speaker manufacturer, and domestic Edifiers use hand-held glue guns to control dispensing in this important link, and the glue that is dispensed has an unpleasant smell and is harmful to the health of workers.

On the other hand, workers repeat high-intensity work every day, which will inevitably affect the production quality of products

At the same time, manual dispensing is inefficient and requires a lot of manpower and time

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