A machine vision-based recognition method for speaker voice coil welding wires

Abstract

A method for identifying welding wires of a speaker voice coil based on machine vision, including the following steps: S1. Image collection: when the production line starts, use a camera to collect images; S2. Threshold judgment: calculate the average pixel value of the collected images, and judge the image Whether there are products on the screen; S3. Image preprocessing: perform noise reduction, edge detection, and contour area screening on images with products, and use the Hough circle detection function to obtain the center coordinates and radius of the product fitting circle, which are respectively recorded as K1 and R ; S4. Area calculation: corrode the preprocessed image, calculate the area of ​​the product outline, set the area threshold, and screen to obtain the center coordinates K2 and K3 of the two solder joints in the corresponding product; S5. Image segmentation: calculate two Segment the image obtained in step S3 with straight line K1K4, the middle point coordinate K4 of the central coordinates of the welding spot; S6. Obtain the welding line coordinates: based on the center coordinate K1 and the radius R, generate a circle whose radius increases with a fixed step to intersect the segmented image , get all the coordinates on the welding 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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