An optical detection system and detection method for the inner surface of a pipeline

Abstract

The invention discloses an optical detection system and method for an inner surface of a pipeline. The system simplifies detection for the pipeline and has the characteristics of being low in cost, non-contact, high in precision and easy to operate. According to the method for measuring the pipeline, complexity of calculation is reduced, measuring precision is improved, an LED lighting source is arranged in an object space focal plane of an illuminating objective lens, and after being subjected to beam expanding and shaping by the illuminating objective lens, 555 nm light emitted by the LED lighting source irradiates to transmission-type optical grating evenly in a form of parallel light; by means of an optical system consisting of a projection objective lens and a reflecting mirror a, theoptical grating is clearly projected and imaged on the inner wall of the pipeline; an optical system consisting of an imaging objective lens and a reflecting mirror b performs converging imaging on the inner wall of the pipeline and the optical grating again, and digital images are collected by a CCD camera; morphology of the inner wall of the pipeline can be measured through combination with experimental calibration according to known parameters of the optical systems and the optical grating.

Description

technical field [0001] The invention relates to the technical field of pipeline detection, in particular to an optical detection system and detection method for the inner surface of a pipeline. Background technique [0002] With the development of science and technology, the research on intelligent and non-contact measurement methods has been widely valued. Structured light measurement technology is becoming more and more mature, but due to the high-precision mechanical drive device, the cost is greatly increased, which is not conducive to popularization and application. However, in the actual operation, the existing measurement method needs two cameras to be synchronized when zooming, changing the aperture, and changing the position, which is inconvenient to operate, difficult to realize the technology, and the measurement accuracy is low, the applicable field is narrow, and it cannot be more effectively adapted to social needs. . Contents of the invention [0003] The ...

AI Technical Summary

Problems solved by technology

Structured light measurement technology is becoming more and more mature, but due to the high-precision mechanical drive device, the cost is greatly increased, which is not conducive to popularization and application

However, in the actual operation, the existing measurement method needs two cameras to be synchronized when zooming, changing the aperture, and changing the position, which is inconvenient to operate, difficult to realize the technology, and the measurement accuracy is low, the applicable field is narrow, and it cannot be more effectively adapted to social needs.

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