Measurement method of reflective surface parts based on optical vision and conoscopic polarization group sum

A technology of curved surface parts and optical vision, which is applied to measurement devices, optical devices, instruments, etc., can solve problems such as affecting the physical and mental health of measurement personnel, affecting the accuracy of measurement results, and long preparation time, achieving fast measurement speed and improving work quality. , the effect of reducing the rework rate
CN110579180BActive Publication Date: 2020-12-18HEFEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI UNIV
Publication Date
2020-12-18

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Abstract

The invention is applicable to the technical field of curved-surface part measurement, and provides a reflective curved-surface part measuring method based on a combination of light vision and conoscopic polarization. The reflective curved-surface part measuring method comprises the steps of: A, carrying out modeling; b, performing modeling analysis; c, respectively measuring a polyhedral standardblock by using a surface structured light vision sensor and a conoscopic polarization holographic sensor, so as to determine corresponding point sets of point cloud data P1 and P2; d, geometrically processing the point cloud data obtained in the step C by using a point cloud processing assembly, performing influence overlapping comparison on three-dimensional modeling in the steps A, B and C, andconducting confirmation comparison on modeling data in the steps by adopting a coordinate system rotation method; and measuring a complex curved-surface part by using a method of combining surface structured light with conoscopic polarization holography, synthesizing the obtained three-dimensional point cloud data under the same coordinate, and finally acquiring complete three-dimensional point cloud data of the part. Therefore, the reflective curved-surface part measuring method can realize effective measurement of the reflective curved-surface part, and can improve the measurement efficiency and measurement precision.
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Description

technical field

[0001] The invention relates to the technical field of curved surface parts measurement, in particular to a method for measuring reflective curved surface parts based on optical vision and conoscopic polarization group sum. Background technique

[0002] Due to the large change in surface reflectivity of parts with complex curved surfaces, it is difficult to measure them. The existing technology cannot achieve the purpose of high-precision and high-efficiency non-coating measurement at the same time. With the rapid development of electronic technology and computer technology, surface structured light vision non-contact measurement technology has achieved unprecedented development. The measurement accuracy of structured light measurement technology based on computer vision can reach 0.025mm, and the measurement speed can exceed one million points per second. When performing optical non-contact measurement, problems such as mutual reflection, directional reflec...

Claims

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