Bearing roller pin size detection system and method based on machine vision

Abstract

The invention discloses a bearing roller pin size detection system and method based on machine vision. A single low-cost 2D camera is used for collecting images. An industrial camera is used to acquire the images. The acquired images are stored in an industrial personal computer. The industrial personal computer processes the images. Background interference is removed from the processed images byusing horizontal and vertical projection methods, angle correction is performed on an extracted ROI area. A ROI image is converted into a binary image by using a threshold segmentation method, and filling is performed to ensure that an internal color of a contour of a roller pin is white. Contour extraction is performed on the processed image. A detection size of the roller pin is calculated according to a proportional relation between a visual field range of the camera and an image pixel, the roller pin with a qualified size arrives at a storage box along with a transmission belt, and for theroller pin with a unqualified size, an elimination signal is sent to PLC by the industrial personal computer, and an elimination mechanism is controlled to eliminate the roller pin through the PLC. The roller pins moving on an assembly line are detected and removed in real time.

Description

technical field [0001] The invention relates to the field of machine vision measurement, in particular to a machine vision-based bearing needle roller size detection system and method. Background technique [0002] Bearings are a very important part in the machinery industry and are widely used. Thin and long needle rollers are used inside. The needle rollers have a compact structure in the radial direction and are suitable for installation on support parts with limited radial dimensions. They need to have high load bearing capacity. The manufacturing accuracy of the needle rollers directly affects the quality of the bearing. Bad. Therefore, in the bearing quality inspection process, the size of the needle roller is a very important inspection index. If needle rollers with serious defects are mixed in, it will have an impact on the service life of the bearing if it is light, and it will bring negative economic effects and losses to the manufacturer, and it will also damage...

AI Technical Summary

Problems solved by technology

However, 3D scanning equipment has high precision, and most high-precision scanning equipment is expensive, and the scanning speed is slow, which requires high levels of operators, and is not suitable for large-scale applications.

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