A non-contact optical measurement method and device for the volume of complex surface objects

Abstract

The invention relates to a non-contact type optical measuring method and device for measuring volume of objects with complicated surfaces. The non-contact type optical measuring device comprises a miniature projector with a depending projection lens, a first double-side telecentric lens used for projecting annular structure light is arranged right below the miniature projector, a rotary stage for disposing complicated objects to be measured is arranged right below the first double-side telecentric lens, a second double-side telecentric lens is arranged beside the rotary stage, and a CCD (charge coupled device) camera is arranged beside the second double-side telecentric lens and on a focal plane of the second double-side telecentric lens. A step of three-dimension reconstruction before volume measurement is omitted, so that higher accuracy is achieved; diffuse reflection is measured, complicated surfaces of the objects like plasticene can be measured; and a reliable technical device and method is provided for measuring volume of non-contact type accurate objects.

Description

technical field [0001] The invention relates to a non-contact optical measurement method and device for complex surface object volume. Background technique [0002] Optical three-dimensional measurement technology is an intelligent and visualized high-tech integrating optical, mechanical, electrical and computer technologies. spatial coordinates. The traditional non-contact optical three-dimensional measurement technology mainly includes time-of-flight method, interferometry method and triangulation method. [0003] The time-of-flight method is based on the time modulation of the structured light beam by the three-dimensional surface shape. Generally, a laser is used to obtain distance information by measuring the time-of-flight of the light wave. Combined with an additional scanning device, the light pulse scans the entire object to be measured to obtain three-dimensional data. The time-of-flight method exchanges the time resolution of signal detection for distance measur...

AI Technical Summary

Problems solved by technology

Binocular vision is a typical passive three-dimensional measurement technology. Its advantage lies in its strong adaptability, and it can flexibly measure the three-dimensional information of objects under various conditions. The disadvantage is that it requires a large number of correlation matching operations and complex spatial geometric parameters. Calibration and other issues, low measurement accuracy, large amount of calculation, not suitable for precision measurement, often used in the identification, understanding and configuration analysis of three-dimensional targets, and more applications in the aviation field

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