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Proceedings Paper

The non-contact precision measurement and noise reduction method for liquid volume metrology
Author(s): Jintao Wang; Ziyong Liu; Lin Tong; Long Zhang; Ligong Guo; Xuesong Bao
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Paper Abstract

Liquid volume is one important metrology method for commercial transaction in international trade, and vertical tank is used as main metrology tool. One non-contact optical measurement system was raised by using laser scanning method. The coordinates of vertical tank shell were acquired by phase-shift ranging method and angular measurement, and the set of coordinates is named as data cloud. The measurement errors of distance and angle are 2mm and 2" respectively. Wavelet was applied to noise reduction and curve feature extraction for data cloud. Iterative method was used to deduce the radius at each course height. One 1000m3 vertical tank used as test object, comparison experiment was carried out with strap method (international arbitral standard). The experimental results show that the noise due to tank shell surface characteristics and laser scanning devices could be filtered satisfactorily, and the local curve features of tank shell were described correctly.

Paper Details

Date Published: 15 November 2011
PDF: 7 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 832133 (15 November 2011); doi: 10.1117/12.905216
Show Author Affiliations
Jintao Wang, National Institute of Metrology (China)
Ziyong Liu, National Institute of Metrology (China)
Lin Tong, National Institute of Metrology (China)
Long Zhang, National Institute of Metrology (China)
Ligong Guo, National Institute of Metrology (China)
Xuesong Bao, National Institute of Metrology (China)

Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)

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