Rapid and high-precision measurement method for deep hole inner section contour features

Abstract

The invention belongs to the technical field of geometric quantity precision measurement based on machine vision, and provides a rapid and high-precision measurement method for deep hole inner section contour features. An annular laser emits stable annular structure light, and a convex lens aggregates the discrete annular structure light into parallel light; a triangular imaging lens group is used for constructing a mapping relation between deep hole inner section contour features and an image annular structure light center, performing high-precision calibration on a space mapping relation between small hole geometric parameters and image coordinates, amplifying the inner section contour features and improving high-resolution acquisition of the features in the hole; a right-angle prism vertically redirects the parallel light output by the triangular imaging lens group; an magnifying lens group optically magnifies the parallel light; an industrial camera receives the output parallel light information and obtains the deep hole inner section contour features. According to the invention, the in-hole offset is optically amplified, and the imaging resolution and the measurement precision can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of precise measurement of geometric quantities based on machine vision, and specifically relates to a high-precision measurement method for profile features of a section inside a deep hole. Background technique [0002] In recent years, small-diameter deep-hole parts have been widely used in the core equipment of my country's nuclear power, energy power, aerospace and other major projects. The processing accuracy and quality of small-diameter deep-hole parts determine the performance of the core equipment of the above-mentioned major projects. The profile characteristics of the inner section of the small-diameter deep hole determine the machining accuracy of the small-diameter deep-hole parts. Therefore, it is of far-reaching significance to study how to obtain the cross-sectional profile features in deep holes. [0003] Some research institutions and universities at home and abroad have also engaged in a lo...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problems of single measurement parameters and discontinuous measurement data in the measurement of the geometric characteristics of the inner surface of deep holes, which lead to the need for multiple measurements of the inner surface parameters step by step, complex measurement process, low measurement efficiency, and poor precision. Fast and high-precision measurement method for the profile characteristics of the cross-section in the hole

Images