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Ultrasound-based household water meter Design and Development

Author: ZhangMeng
Tutor: ZhangHui
School: Hefei University of Technology
Course: Measuring Technology and Instruments
Keywords: Household Meter Water Flow Meter Ultrasonic transducer Difference method MSP430F417
CLC: TH814
Type: Master's thesis
Year: 2010
Downloads: 158
Quote: 1
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Abstract


At present, the domestic use of measurement used more mechanical rotor meter, the meter high leakage rate, low accuracy of quick wear and defects. In order to adapt to the requirement of saving water, this paper designed a based on ultrasonic technology is suitable for household water meter. Requirements higher than that of mechanical water meter, water meter precision at the same time, has simple operation, low cost, etc. By using time difference measuring water flow, this paper selects the center frequency of 1 MHZ transceiver piezoelectric ultrasonic transducer as the flow measurement sensors, and to track arrangement of ultrasonic transducer design. In order to be able to obtain good ultrasonic signal, the design of ultrasonic transducer driver module and the zero passage detection and signal processing software screen window as the core module. Using high precision time conversion chip timing module circuit design, to ensure accurate timing of ultrasonic signal transit time. Software system design is mainly for data processing and display and parameter setting and modifying, further improved the design of the whole system. Experiments show that the design of ultrasonic flowmeter the basic error of plus or minus 1%, the instrument precision grade higher than that of mechanical water meter, accord with the requirement of design.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Thermal measuring instruments > Flow Meter
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