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A Non-contact On-Line Measurement Method for 3D Coordinate of Large System

A large-scale system and measurement method technology, applied in the direction of measuring devices, instruments, and optical devices, can solve problems such as large three-dimensional size errors, and achieve the effects of low cost, high-precision measurement, and high measurement accuracy

Active Publication Date: 2020-04-07
BEIJING ZHENXING METROLOGY & TEST INST
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a large-scale system three-dimensional coordinate non-contact online measurement method to solve the problem of large errors in the online measurement of the three-dimensional dimensions of large complex curved surfaces and complex structures

Method used

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  • A Non-contact On-Line Measurement Method for 3D Coordinate of Large System
  • A Non-contact On-Line Measurement Method for 3D Coordinate of Large System
  • A Non-contact On-Line Measurement Method for 3D Coordinate of Large System

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] For an area larger than 25m 2 large-scale system, the invention provides a three-dimensional coordinate non-contact online measurement method, such as figure 1 As shown, the devices used in the implementation of the method include cameras, laser displacement sensors, projectors, and control systems.

[0045] The video camera, laser displacement sensor and projector are respectively connected with the control system through cables.

[0046] According to the control instructions of the control system, the projector projects the sent periodic modulated fringe pattern onto the surface of the large-scale system to be measured;

[0047] The camera shoots the fringe patterns on multiple parts of the measured object, and transmits the captured images to the control system;

[0048] The laser displacement sensor performs high-precisi...

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Abstract

The invention provides a large scale system three-dimensional coordinate noncontact online measurement method. A used measurement system includes a camera, a laser displacement sensor, a projector anda control system. The camera, the laser displacement sensor, the projector are connected to the control system via cables. The laser displacement sensor is configured to scan the dead angle of an object to be measured with high precision, and transfer a scanned image to the control system. The large scale system three-dimensional coordinate noncontact online measurement method, by means of monocular vision information, structural light and laser displacement detection data fusion, can measure three-dimensional dimensions with high precision and can be used for state monitoring and quality inspection when a key part with large complex surfaces and complex structures are machined.

Description

technical field [0001] The invention relates to the field of three-dimensional dimension measurement, in particular to a non-contact online measurement method for three-dimensional coordinates of a large system. Background technique [0002] In military and national defense fields such as aerospace, missiles, and heavy weapons and equipment, with the increasingly high requirements for the performance of large-scale systems, the processing and manufacturing of key components with large complex surfaces and complex structures, and the 3D measurement of monitoring the state and performance of large components have received great attention. Unprecedented challenges and opportunities. In the fields of automobile and ship manufacturing, China's production and sales have been at the forefront of the world in recent years. However, corresponding to the strong market demand and production and sales, the domestic large-scale ship propellers and manufacturing capacity are seriously ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/25
CPCG01B11/002G01B11/2527G01B11/254G01B11/2545
Inventor 吴红霞张鑫孙红胜王加朋张玉国
Owner BEIJING ZHENXING METROLOGY & TEST INST
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