Cylindricity non-contact measurement method and system based on multi-diameter splicing technology

A non-contact measurement and measurement system technology, applied in the direction of measuring devices, instruments, optical devices, etc., to achieve the effects of convenient operation, good application value, and high measurement accuracy
CN101419063AInactive Publication Date: 2009-04-29SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2009-04-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a non-contact method and a system for measuring cylindricity based on a multi-aperture splicing technique. The system mainly comprises a digital grating projection system, an image acquisition system, a multi-view overlap-scanning mechanism and control system, and a computer software processing system. The measurement method comprises the following steps: depth and transverse calibration is firstly performed to the system; then fringe images of a measured cylinder at various visual angles are acquired through the multi-view overlap-scanning mechanism, so as to obtain three-dimensional data at various visual angles after image processing; and complete cylindrical surface shape splicing is performed to the three-dimensional data at various visual angles by use of the multi-aperture splicing technique, so as to realize accurate cylindricity evaluation according to GPS (geometrical product specifications). The system can realize non-contact cylindricity measurement and evaluation based on the multi-aperture splicing technique, and effectively solves the problems that the prior cylindricity measurement is insufficient in sampling point, not unified in evaluation results and the like. The measurement system can achieve higher measurement precision and has better repeatability.
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Description

technical field

[0001] The invention relates to a method and system for measuring cylindricity, in particular to a method and system for realizing non-contact precision measurement of cylindricity based on multi-aperture splicing technology and adopting a digital grating fringe projection measurement method. Background technique

[0002] In modern industrial production, cylindrical parts are not only required to ensure their dimensional accuracy, but also have high requirements for their shape and position accuracy, which directly affect the matching properties of the mating surface, the positioning accuracy of the rotating surface, and then affect the rotation of the entire machine Accuracy, vibration, noise, lubrication and service life of parts, etc. Therefore, measuring the cylindricity error of the rotary surface of a part is one of the important indicators to test the processing quality of this type of part.

[0003] At present, the cylindricity error measurement tech...

Claims

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