Method and system for measuring diameter and projection height of cylinder based on linear structured light

Abstract

The invention discloses a method and a system for measuring the diameter and the projection height of a cylinder based on linear structured light, and the method comprises the steps: fixing a cylinder workpiece, starting a linear laser, and adjusting the linear structured light to be perpendicular to the center line of the cylinder; collecting arc contour data of a plurality of positions of the cylindrical workpiece; based on the arc contour data of the current position, determining the height of a surface bulge by adopting a secondary circle fitting processing method for eliminating bulge noise; repeating the above steps to obtain the secondary circle fitting data of the plurality of positions and the corresponding surface projection heights, and obtaining the diameter of the minimum surrounding circle as the diameter of the cylinder based on the secondary circle fitting data of the plurality of positions; and after measurement is finished, closing the line laser. According to the invention, synchronous measurement of the cylinder diameter and the projection height can be rapidly realized, and the measurement precision is improved.

Description

technical field [0001] The invention relates to a method for measuring the diameter of a cylinder, in particular to a method and system for measuring the diameter of a cylinder and the height of a protrusion based on line structured light. Background technique [0002] In the field of industrial production, it is necessary to measure the diameter of a cylindrical workpiece to determine whether the workpiece meets the requirements of the production process. At present, vernier calipers are basically used to measure the diameter of cylinders, which need to be measured multiple times at different cross-sections of the cylinder. When the inspectors use vernier calipers to measure, they are easily disturbed by human factors, such as the proficiency of the surveyors, measurement operation methods, etc., resulting in measurement results. The accuracy is low, the deviation is large, and the vernier caliper needs to be adjusted for each measurement, and the detection efficiency is lo...

AI Technical Summary

Problems solved by technology

At present, vernier calipers are basically used to measure the diameter of cylinders, which need to be measured multiple times at different cross-sections of the cylinder. When the inspectors use vernier calipers to measure, they are easily disturbed by human factors, such as the proficiency of the surveyors, measurement operation methods, etc., resulting in measurement results. Low precision, large deviation, and the vernier caliper needs to be adjusted for each measurement, and the detection efficiency is low

At the same time, the measurement of the height of the protrusion on the surface of the cylinder also relies on the vernier caliper, which encounters the same human interference

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