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| 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 |
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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.
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2011, Vol. 32 
