Geometric Parameter Measurement of Ultrasonic Flowmeter Based on Laser Tracker
CUI Hang1,2,HU He-ming2,LI Li-xia3,GUO Chen-xi3,XIE Dai-liang1,YANG Zhuo4,CHENG Zhen4
1. China Jiliang University, Hangzhou, Zhejiang 310018, China;
2. National Institute of Metrology, Beijing 100029, China
3. Beijing South-to-North Water Diversion Tuancheng Lake Management Office, Beijing 100195, China
4. Beijing Hydrology Center, Beijing 100089, China
Abstract：For large diameter ultrasonic flowmeters with probes installed on existing pipe, geometric parameters measurement contribute a lot to the flowmeter accuracy, based on laser tracker, a geometrical parameter measurement method for large-diameter ultrasonic flowmeter is established. 3-D coordinates of pipe surface points and probe cylinder points are collected by laser tracker outside the pipe. Spatial model of the pipe and probes are built by a commercial tool, and then all the geometric parameters are calculated. Two field measurements of pump station pipes are performed to estimate the flow uncertainty due to different geometric parameters using this method. The method not only solves the problem of geometric measurement outside the pipe, and the uncertainty level is also controlled at around 0.2%. Compared with the measured values by the laser tracker, it is show that there are not small deviation in the setting values by manufacturers, which needs to be paid more attention by manufacturers and owners.
［1］胡鹤鸣, 杜晓康, 孟涛, 等. 大口径超声流量计几何参数的自动化测量方法［J］. 计量学报, 2012, 33(5A): 114-119.
Hu H M, Du X K, Meng T, et al. Automatic Measurement Method of Geometric Parameter of Large Diameter Ultrasonic Flowmeter［J］. Acta Metrologica Sinica, 2012, 33(5A): 114-119.
［2］霍殿中. 大流量测量和多声道超声流量计 ［C］// 全国流量测量学术交流会. 2006.
［3］孟涛, 胡鹤鸣, 王池, 等. 基于全站仪的大口径超声流量计几何参数测量方法 ［C］// 全国流量测量学术交流会. 上海, 2010.
［4］胡鹤鸣, 王池, 孟涛, 等. 超声流量计几何参数测算方法及其不确定度分析 ［J］. 仪器仪表学报, 2010, 31(7): 1583-1587.
Hu H M, Wang C, Meng T, et al. Study on geometric parameter calculation method and uncertainty estimation of ultra sonic flowmeter ［J］. [WTBX][STBX]Chinese Journal of Scientific Instrument[STBZ][WTBZ], 2010, 31(7): 1583-1587.
［5］Stefan B. Discussion of installation methods and errors of multipath acoustic discharge measurements in closed conduits ［C］// Proc 5th International Conf IGHEM. Lucerne, Switzerland, 2004.
［6］国家质量监督检验总局. GB∕Z 35717—2017 水轮机、蓄能泵和水泵水轮机流量的测量 超声传播时间法［S］. 2017.
［7］Broquet P, Conti L, Vaterlaus H P. Use of total station theodolite for the installation of ultrasonicflow-meters in large diameter penstocks ［C］// Proc 3rd Inter-national Conf IGHEM, 2000.
［8］甘霖, 李晓星. 激光跟踪仪现场测量精度检测 ［J］. 北京航空航天大学学报, 2009, 35(5): 612-614.
Gan L, Li X X. Site measuring accuracy testing of laser tracker ［J］. [WTBX][STBX]Journal of Beijing University of Aeronautics and astronautics[STBZ][WTBZ], 2009, 35(5): 612-614.
［9］欧阳健飞, 刘万里, 闫勇刚, 等. 激光跟踪仪坐标测量精度的研究 ［J］. 红外与激光工程, 2008, (S1):15-18.
Ouyang J F, Liu W L, Yan Y G, et al. Coordinate mea-suring accuracy of laser tracker ［J］. [WTBX][STBX]Infrared and Laser Engineering[STBZ][WTBZ], 2008,(S1):15-18..
［10］张春富, 张军, 许文海, 等. 激光跟踪仪现场测量不确定度的评定 ［J］. 计量学报, 2005, 26(1): 20-22.
Zhang C F, Zhang J, Yu W H, et al. Evaluation of Site Measuring Uncertainty of Laser Tracker ［J］. [WTBX][STBX]Acta Metrologica Sinica[STBZ][WTBZ], 2005, 26(1): 20-22.
［11］张曦, 胡春华, 陈五一. 二次曲面拟合与拟合参数不确定度分析 ［J］. 北京航空航天大学学报, 2006, 32(9): 1091-1095.
Zhang X, Hu Ch H, Chen W Y. Quadratic surface fitting and uncertainty anaIysis of fitting parameters ［J］. [WTBX][STBX]Journal of Beijng university of Aeronautics and Astronautics[STBZ][WTBZ], 2006, 32(9): 1091-1095.
［12］任瑜,张丰,郭志敏, 等. 一种通用的工业机器人位姿检测方法 ［J］. 计量学报, 2018, 39(5): 615-621.
Ren Y, Zhang F, Guo Z M, et al. A General Pose Testing Method of Industrial Robot［J］. [WTBX][STBX]Acta Metrologica Sinica[STBZ][WTBZ], 2018, 39(5): 615-621.
［13］孙海丽, 姚连璧, 周跃寅, 等. 激光跟踪仪测量精度分析 ［J］. 大地测量与地球动力学, 2015, 35(1): 177-181.
Sun H L, Yao L B, Zhou Y Y, et al. Analysis of Mea-surement Accuracy of Laser Tracker ［J］. [WTBX][STBX]Journal of Geodesy and Geodynamics[STBZ][WTBZ], 2015, 35(1): 177-181.
2020, Vol. 41 
