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Miniature three-dimensional measurement system based on digital fringe projection

A fringe projection, three-dimensional measurement technology, applied in the field of measurement, can solve problems such as limitations, large size of three-dimensional measurement equipment, and unsuitability for measurement

Inactive Publication Date: 2014-02-12
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used 3D measurement equipment is large in size and is still limited and not suitable for measurement in narrow spaces

Method used

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  • Miniature three-dimensional measurement system based on digital fringe projection
  • Miniature three-dimensional measurement system based on digital fringe projection

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and examples, wherein, the specific examples described here are only used to explain the present invention, not to limit the present invention.

[0022] Such as figure 1 As shown, the present invention is a miniature three-dimensional measurement system based on digital fringe projection, which includes: digital fringe projection device (100), optical fiber image transmission bundle (300), miniature measuring terminal (200), and computer (500).

[0023] In the digital fringe projection device (100), the DLP projector (101) transforms the digital fringe image generated by the computer (500) through lens combination: lens one (102), lens two (103) and collimating lens one (104) into A digital fringe pattern that satisfies the transmission of an optical fiber image beam (300);

[0024] In the miniature measurement terminal (200), the digital fringe pattern projected by the ...

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Abstract

The invention discloses a miniature three-dimensional measurement system based on digital fringe projection. The miniature three-dimensional measurement system comprises a digital fringe projector (100) and a miniature measurement terminal (200). Digital fringes projected by a DLP projector (101) in the digital fringe projector (100) form a digital fringe graph meeting the requirements of coherent optical fiber bundles (300) for transmission through combination of a first lens (102), a second lens (103) and a first collimating lens (104). The digital fringe graph in the miniature measurement terminal (200) is projected onto the surface of an object (400) to be measured by sequentially passing through a third lens (201), an aperture diaphragm (202), a second collimating lens (203), a 45-degree reflector (204) and a third collimating lens (205). The modulated and deformed digital fringes are collected by a small-sized CCD camera (207) through the third collimating lens (205), the 45-degree reflector (204) and a fourth lens (206) and are transmitted to a computer (500). According to the miniature three-dimensional measurement system, three-dimensional shape information of the object in a narrow and small space can be obtained flexibly, the measurement speed and measurement accuracy are high, and the implementing method is simple.

Description

technical field [0001] The invention belongs to the field of measurement technology, in particular to a miniature three-dimensional measurement system based on digital fringe projection, which is suitable for measuring the shape of an object surface in a narrow space. Background technique [0002] Optical three-dimensional position profile measurement technology is widely used in various measurement fields due to its advantages of non-contact, high precision and full-field display. [0003] Three-dimensional shape measurement based on optical digital fringe projection is a relatively simple and practical structured light measurement technology. In traditional structured light measurement, the digital fringes generated by the grating are often projected onto the surface of the measured object, and the surface of the measured object modulates the digital fringes, so that the deformed digital fringes contain the three-dimensional shape information of the measured object surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
Inventor 张伟
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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