Industrial camera cylinder detection method

Abstract

The invention relates to an industrial camera cylinder detection method. A workpiece to be detected is sent to a feed driving wheel by a driving synchronous belt, and the workpiece is then sent to a detection station by the feed driving wheel. When the workpiece reaches the detection station, the workpiece is driven by a driving wheel to rotate. At the moment, backlight is turned on, operation mode of a camera is set to be an area-array sampling mode so as to acquire an outer contour area-array image of the detected workpiece, and diameter and height of the detected workpiece are calculated. Then, rotating speed of the workpiece is obtained by an encoder which is coaxial with the driving wheel; linear scan frequency is calculated; the operation mode of the camera is set to be a linear array mode; linear scan frequency is set; a linear-scan light source is turned on; a lateral surface image of the workpiece is acquired, surface defects of the workpiece are recognized, and the detection is finished. According to the detection result, whether the workpiece is qualified and the grade of the workpiece are judged, so as to classify the workpiece.

Description

[0001] (1) Technical field [0002] The invention relates to the field of industrial camera detection, in particular to the field of using the industrial camera to detect cylindrical workpieces. [0003] (2) Background technology [0004] With the rapid development of machine vision image sensors, industrial cameras are basically divided into line-scan cameras and area-scan cameras in terms of scanning principles, and the scanning speed is getting higher and higher. 500FPS (refresh rate). In current inspection applications, line scan cameras are mainly used for printing inspection and planar defect inspection; area array cameras are used for contour size inspection, image processing comparison, positioning and other requirements. [0005] In recent years, CMOS image sensor technology has developed rapidly. The exposure time of the area array sensor with global exposure can be controlled at about 10us, and the output control function is powerful. The 1-line output can be realiz...

AI Technical Summary

Problems solved by technology

[0010] 1. Two cameras are required, one line array camera collects images of the side surface of the cylinder, analyzes defects, and the other area array camera collects the outer contour of the cylinder, and calculates the diameter and height of the cylinder; two installation stations need to be designed for the two cameras, and space is required Large, complex structure, difficult synchronization control, high cost

[0011] 2. The speed of the line array camera is fast. Generally, it is a camera link interface or a Gigabit network interface. It needs to be equipped with a dedicated acquisition card to work, and the overall solution cost is high.

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