A Novel Water Meter Calibration Method Based on Machine Vision Technology
TANG Si-meng1,ZHAO Jie-yu2,LU Xiao-feng1
1.Ningbo Institute of Measurement and Testing, Ningbo, Zhejiang 315048, China;
2.The College of Information Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, China
Abstract：The machine vision technology applied to the water meter calibration is discribed. Several high speed and high resolution cameras are installed at the top of the checked meter to dynamically access the running water meter image. The meter pointer is accurately positioned using color feature modeling and background Gaussian fitting methods. Machine vision approaches are used to convert the captured images into digital readouts. Encountered problems such as blurred surface and air bubble interfere are overcome. The developed system realizes high efficient automatic water meter verification.
［1］詹志杰.水表技术手册［M］.北京:中国计量出版社,2004.
［2］国家质量监督检验检疫总局. JJG162—2009 冷水水表［S］.2009.
［3］赵蕾荣.水表检定中的数据处理［J］.计量技术,2012,（10）:72-74.
［4］张祖明.微机控制水表检定装置:中国,200420114413.4［P］.2006-03-29.
［5］Sablatnig R. Visual inspection of water meters used for automatic calibration ［J］.Image Analysis Applications and Computer Graphics（Lecture Notes in Computer Science）,1995,1024:518-519.
［6］Sablatnig R.Flexible automatic visual inspection based on the separation of detection and analysis［J］.Proc IEEE Int Conf Pattern Recognit,1996:944-948.
［7］Antoniadis I, Hountras A, Glossitis G.Using LabVIEW and PXI for online mechanical parameter monitoring system for a diesel generator unit set［R］.Dept Mech Eng, National Technical Univ,Athens,Greece,Tech Rep 2002_530_821_123_8.5x10.875.qxd, 2002.
［8］Lan J H,Wei X,Bai Z L.Automatic calibration system for analog instruments based on DSP and CCD sensor［J］.Proc SPIE, 2008, 7156:71560Q-1-71560Q-10.
［9］Liu S G,Liu M Y,He Y.Checking on the quality of gauge panel based on wavelet analysis［C］// 2002 International Conference on Machine Learning and Cybernetics,Beijing,China,2002,2:763-767.
［10］Dyer C R.Gauge inspection using Hough transforms pattern analysis and machine intelligence ［J］.IEEE Trans Pattern Anal Mach Intell,1983, 5(6):621-623.
［11］Jaffery Z,Dubey A.Architecture of Non-Invasive Real Time Visual Monitoring System for Dial Type Measuring Instrument ［J］.IEEE Sensors Journal,2013,13(4):1236-1244.
［12］潘丰.水表特性自动校验系统设计［J］.传感器技术,2003,22(10):24-29.
［13］苑玮琦,于聪颖.水表号码读取系统的设计与实现［J］.电子技术应用,2007,(4):74-75.
［14］周志峰,丁维光.基于图像识别的二表位全自动复式水表检定装置的研发［J］.中国计量,2013,(5):86-87.
［15］王三武,戴亚文.多指针水表自动识别系统［J］.仪器仪表学报,2005,26（11）:1178-1180.
［16］程琦,赵军,刘宇.指针式仪表示值识别系统研究［J］.计量学报,2009,30(5):192-195.
［17］周小雨.水表自动检定装置:中国,200720082206.9 ［P］.2008-09-24.
［18］孙军,马俊杰,玄惠萍,等.普通水表自动检定装置及其检定方法:中国,03114302.4 ［P］.2004-10-27.
2015, Vol. 36 
