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Accurate positioning method for circular marker in large-sized curved plate measurement

A circular marking and precise positioning technology, applied in the field of three-dimensional measurement, can solve the problems of large stereo matching and errors, etc.

Inactive Publication Date: 2015-03-04
SHANGHAI JIANGNAN CHANGXING SHIPBUILDING
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AI Technical Summary

Problems solved by technology

If there is no rich color or texture information in the reconstructed scene, such as large curved plates in shipbuilding, stereo matching will produce large errors

Method used

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  • Accurate positioning method for circular marker in large-sized curved plate measurement
  • Accurate positioning method for circular marker in large-sized curved plate measurement
  • Accurate positioning method for circular marker in large-sized curved plate measurement

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Embodiment Construction

[0043] Below we will further describe in detail the precise positioning method of the circular marker in the measurement of the large-scale curved panel of the present invention in conjunction with the accompanying drawings and specific embodiments, in order to understand the design concept and operation process of the present invention more clearly. In this way, the protection scope of the present invention is limited.

[0044] In order to measure large-sized curved panels flexibly, conveniently and stably, the present invention designs a two-stage measurement system, such as figure 1 shown. The two-level measurement system includes a local measurement device 4 and a global measurement device 2, wherein the local measurement device 4 is provided with a movable device, which can flexibly measure large-size curved panels 1 in blocks, and the global measurement device 2 is set in a fixed position to measure the local The spatial position of the measuring device 4 is used to rea...

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Abstract

The invention relates to an accurate positioning method for a circular marker in large-sized curved plate measurement in a shipbuilding manufacture process. Related equipment of the accurate positioning method for the circular marker in large-sized curved plate measurement comprises a global measuring device and a local measuring device; the global measuring device is formed by two industrial cameras and a high-performance server which can store and analyze; the local measuring device is formed by two industrial cameras and a projector. A specific marker is installed on the local measuring device to accurately measure the spatial position of the local measuring device. A vision measurement based circular marker positioning technology comprises the accurate positioning method for the circular marker installed on a measuring device. The method can automatically, timely, conveniently and accurately position the circular marker on the measuring device without being in contact with a steel plate surface.

Description

technical field [0001] The invention relates to three-dimensional measurement, in particular to the automatic detection of large-scale curved panels during ship construction, and in particular to a method for precise positioning of a core technology circular marker. Background technique [0002] At present, three-dimensional measurement technology mainly includes contact measurement and non-contact measurement. For large-scale targets in ocean engineering equipment, only non-contact 3D measurement technology can be used. Non-contact 3D measurement technology includes two categories: visual camera 3D measurement and laser 3D measurement. The photographic three-dimensional measurement system has the advantages of fast measurement speed and high measurement density. The laser measurement system has the advantages of high measurement accuracy, but when measuring large-scale targets, the laser scanning speed is slow, which cannot meet the real-time requirements in industrial pr...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/24
Inventor 谢妤耿德品隋毅薛士枚
Owner SHANGHAI JIANGNAN CHANGXING SHIPBUILDING
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