Object volume non-contact measuring method and device based on reflection mirror secondary imaging

Abstract

The invention relates to an object volume non-contact measuring method and device based on reflection mirror secondary imaging. The device comprises a rotary carrier table, wherein a first parallel light source is flatly arranged on the rotary carrier table, a plane reflection mirror forming a 45-angle included angle in the vertical direction is arranged above the rotary carrier table, a second parallel light source is vertically arranged beside the rotary carrier table, a double-side telecentric lens rightly facing the second parallel light source is arranged beside the rotary carrier table and installed on a CCD video camera, and a laser device for horizontally transmitting laser to the plane reflection mirror so as to reflect the laser to the center of the rotary carrier table is arranged above the CCD video camera. Compared with conventional methods, a great breakthrough on time and accuracy is achieved, and the device is simple in structure, diffuse reflection can be measured, complicated object surfaces similar to plasticine and the like can be measured, and the reliable technical device and method is used for non-contact accurate object volume measurement.

Description

technical field [0001] The invention relates to a non-contact measuring method and device for object volume based on mirror secondary imaging. Background technique [0002] Non-contact measurement is a measurement method based on photoelectric, electromagnetic and other technologies to obtain the surface parameter information of the object without contacting the surface of the object to be measured. The traditional non-contact optical three-dimensional measurement technology mainly includes time-of-flight method, interferometry method and triangulation method. Among them, the time-of-flight method generally uses laser light to obtain distance information by measuring the time-of-flight of the light wave, combined with an additional scanning device to scan the entire object to be measured by the light pulse to obtain three-dimensional data; the interferometry method is to pass a beam of coherent light through the spectroscopic system It is divided into measurement light and ...

AI Technical Summary

Problems solved by technology

Although the measurement accuracy of interferometry is high, the measurement range is limited by the wavelength of light, and it can only measure the topography and small displacement of microscopic surfaces, which is not suitable for detecting large-scale objects; optical triangulation is a commonly used optical three-dimensional measurement technology. Based on traditional triangulation, the depth information of the point is calculated by the angle change of the point to be measured relative to the optical reference line offset

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