A Novel Battery-powered Digital Fluidic Oscillation Flow-meter
FANG Min1,WANG Qin1,XU Ke-jun1,2
1. School of Electrical and Automation Engineering, Hefei University of Technology, Hefei,Anhui 230009, China;
2. Engineering Technology Research Center of Industrial Automation, Hefei,Anhui 230009, China
Abstract：An low-power digital fluidic oscillation flow-meter based on MSP430F5418 MCU is developed,that adapted to the primary instrument of the votex flow-meter and swirl flow-meter. The solution combines the small number spectral analysis with the analog band-pass filters and the algorithm is implemented by means of the assemble language and the fixed-point calculation. All that filters the noise signal of the flow signal in as lower as possible power consumption, and extends the lower flow limit. In the light of features of DC/DC and Low Dropout Regulator(LDO), a switching circuit is designed to improve the efficiency of the power module. According to the requirements of measurement and precision, the temperature and pressure compensation module acquires the temperature and pressure signals in a certain time interval for reducing the power consumption of the meter.
［1］Wada M, Hondoh M, Ando T. Vortex Flow-meter:Japan,2001153698［P］. 2001-06-08.
［2］Warren E. Adaptive Filter with Sweep Filter Analyzer for a Vortex Flow-meter:US,6212975B1［P］.2001-04-10.
［3］Hondoh M, Wada M, et al. A vortex flow-meter with spectral analysis signal processing［C］//Proceedings of the First ISA/IEEE Conference.Rosemont:Sensor for Industry,2002,35-40.
［4］徐科军,曾宪俊,等. 低功耗两线制涡街流量计:中国,200710162074.5［P］.2009-03-18.
［5］刘三山. 两种数字涡街流量计的硬件研制［D］.合肥:合肥工业大学,2009.
［6］Jung W G,等.运算放大器应用技术手册(1版)［M］.北京:人民邮电出版社,2009:219-312.
［7］王肖芬,徐科军,陈智渊. 基于DSP的低成本涡街流量计信号处理系统［J］.仪器仪表学报,2006,27(11):1427-1432
［8］徐科军,汪安民,等,基于自适应陷波的涡街流量计信号处理系统［J］.计量学报,2007,21(3):199-204.
［9］沈建华, 杨艳琴, 翟骁曙. MSP430系列16位超低功耗单片机原理与应用［M］.北京:清华大学出版社,2004.
［10］徐科军,方敏,王沁. 一种电池供电的数字涡街/旋进旋涡流量计:中国,2010101122135［P］.2010-02-11.
2011, Vol. 32 
