Multi-wire array-laser three-dimensional scanning system and multi-wire array-laser three-dimensional scanning method

Abstract

The invention provides a multi-wire array-laser three-dimensional scanning system and a multi-wire array-laser three-dimensional scanning method. In the system, through a programmable gate array FPGA, accurate synchronization and logic control of the multi-wire array-laser three-dimensional scanning system can be realized. A wire laser array is used as a projection pattern light source. Through the FPGA, trigger signals are sent to a stereo vision image sensor, an inertial sensor and the wire laser array. An upper computer receives an image pair shot by the stereo vision image sensor, and carries out coding, decoding and three-dimensional reconstruction on a laser wire array pattern in the image pair. The three-dimensional reconstruction and three-dimensional characteristic point matching and aligning are performed on a characteristic point of a measured object surface. A mixing sensing positioning technology is used to carry out prediction and error correction on matching calculation, which is used for registration and splicing of time-domain-laser three-dimensional scanning data. Simultaneously, measurement error grade assessment is performed in real time and an assessment result is fed back to an error feedback controller so that an adjusting indication is obtained. Therefore, laser three-dimensional scanning with low cost, high efficiency, high reliability and high precision is realized.

Description

technical field [0001] The invention relates to the technical field of three-dimensional scanning of object surface geometry, in particular to a multi-line array laser three-dimensional scanning system and a multi-line array laser three-dimensional scanning method. Background technique [0002] In recent years, 3D scanning, as a fast 3D digital technology, has been increasingly used in various fields, including reverse engineering, industrial inspection, computer vision, CG production, etc., especially in the current rapidly developing 3D printing and intelligent manufacturing. In the field of 3D scanning, as a front-end 3D digitization and 3D visual sensing technology, it has become an important part of the industry chain; at the same time, various applications have raised the bar in many aspects such as the cost, practicability, accuracy and reliability of 3D scanning equipment. higher requirement. [0003] Optical 3D scanning is the most common modern technical means in ...

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