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Proceedings Paper

Precise measurement of liquid petroleum tank volume based on data cloud analysis
Author(s): Jintao Wang; Ziyong Liu; Long Zhang; Ligong Guo; Xuesong Bao; Lin Tong
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Paper Abstract

Metal tanks are generally used for the measurement of liquid petroleum products for fiscal or custody transfer application. One tank volume precise measurement method based on data cloud analysis was studied, which was acquired by laser scanning principle. Method of distance measurement by laser phase shift and angular measurement by optical grating were applied to acquire coordinates of points in tank shell under the control of a servo system. Direct Iterative Method (DIM) and Section Area Method (SAM) were used to process measured data for vertical and horizontal tanks respectively. In comparison experiment, one 1000m3 vertical tank and one 30m3 horizontal tank were used as test objects. In the vertical tank experiment, the largest measured radius difference between the new laser method and strapping method (international arbitrary standard) is 2.8mm. In the horizontal tank experiment, the calibration result from laser scanning method is more close to reference than manual geometric method, and the mean deviation in full-scale range of the former and latter method are 75L and 141L respectively; with the increase of liquid level, the relative errors of laser scanning method and manual geometric method become smaller, and the mean relative errors are 0.6% and 1.5% respectively. By using the method discussed, the calibration efficiency of tank volume can be improved.

Paper Details

Date Published: 31 December 2010
PDF: 8 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75444T (31 December 2010); doi: 10.1117/12.885442
Show Author Affiliations
Jintao Wang, National Institute of Metrology (China)
Ziyong Liu, 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)
Lin Tong, National Institute of Metrology (China)

Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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