A three-dimensional shape measurement method and device based on optical fringe projection and reflection

Abstract

The invention discloses a three-dimensional morphology measurement method based on optical strip projection and reflection and a device. The device comprises a computer, a visible light projector, a CCD (Charge Coupled Device) colorful camera, a display screen, a to-be-tested diffuse reflection object fixing device and a to-be-tested mirror surface reflection object fixing device, wherein the computer is connected with the projector, the camera and the display screen; the projector and the camera are mounted on an optical platform; the display screen is fixed on a precise horizontal movement platform of the optical platform; the projector, the camera and the display screen are positioned on the same side; the camera is positioned between the projector and the display; the to-be-tested diffuse reflection object fixing device and the to-be-tested mirror surface reflection object fixing device are placed on the optical platform; acute angles are formed between the optical axis of the camera and a normal vector of a plane of the display screen and between the optical axis of the camera and the optical axis of the projector. By adopting the method, both a diffuse reflection object and amirror surface reflection object can be measured and objects of two reflection properties can be simultaneously measured, and flexible measurement and integration measurement can be achieved.

Description

technical field [0001] The invention relates to the field of three-dimensional shape measurement, in particular to a three-dimensional shape measurement method and device based on optical fringe projection and reflection. Background technique [0002] The optical three-dimensional shape measurement method is widely used in industrial online inspection, virtual reality, cultural relics protection, reverse engineering, biomedicine and other fields due to its advantages of non-contact, fast measurement speed and non-destructiveness. According to the reflection properties of the measured object, optical three-dimensional measurement is mainly divided into three-dimensional shape measurement of diffuse reflection and specular reflection. At present, the measurement of these two kinds of reflective objects is mostly studied separately, the experimental system is built separately, and the measurement is carried out separately. With the advancement of science and technology and the...

AI Technical Summary

Problems solved by technology

[0009] In summary, although the above-mentioned existing 3D measurement technologies based on optical fringe projection and reflection all have the advantages of non-contact, full-field and fast measurement, they are also continuing to develop in the direction of large dynamic range, fast and high-precision measurement. , but neither can realize the simultaneous and non-limited measurement of diffuse reflection and specular reflection objects, and the integration is poor

Especially with the development of advanced manufacturing and intelligent manufacturing technology, objects with a combination of diffuse reflection and specular reflection characteristics often appear, and the existing optical measurement methods cannot obtain the three-dimensional shape of such combined objects

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