Improvement of ultrasonic flowmeter and its application in large Yellow River Irrigated District
SHI Zhongxing1, ZHANG Shiwei2, ZHANG Yanrui2, YU Jinwen3
1.Institute of Water Resources and Hydroelectric Engineering, Xi′an University of Technology, Xi′an, Shaanxi 710048, China; 2.Administrative Bureau of Jingtaichuan Electric Lift Irrigation Project, Baiyin, Gansu 730400,China; 3.Krcfis (Kecrichen flow and line and senser), Dalian, Liaoning 116033, China
Abstract：To improve the measurement accuracy of the ultrasonic flowmeter in the application of largediameter, and high sediment concentration irrigated area, based on the principle of ultrasonic flowmeter, the ultrasonic flowmeter is improved by increasing the signal intensity of the sound source, reducing the propagation attenuation loss, and modifying temperature curves. The results show that the sensor with a frequency of 1 MHz has lower sound intensity and receiving quality than those of 05 MHz and 02 MHz, and the signal is severely interrupted; polyether-ether-ketone acoustic material has less acoustic attenuation than polysulfone; the larger the pipe diameter, the greater the sound attenuation, therefore, the largediameter ultrasonic flowmeter can be installed in singlemode mode; temperature and sediment have a certain influence on the measurement accuracy, and the summer detection failure rate is higher than other seasons; the digital signal processing (DSP) can increase the amount of source signal processing, shorten the effective calculation period, and eliminate the loss of scattered sound source caused by the change of sediment content; the modified temperature curve can reduce the effect of the temperature on measurement accuracy. The research results can provide a certain technical support for the accurate measurement of the Yellow River water by the large diameter ultrasonic flowmeter.
史中兴, 张师玮, 张彦蕊, 于金文. 大型引黄灌区超声波流量计的改进与应用[J]. 排灌机械工程学报, 2018, 36(12): 1276-1281.
SHI Zhongxing, ZHANG Shiwei, ZHANG Yanrui, YU Jinwen. Improvement of ultrasonic flowmeter and its application in large Yellow River Irrigated District. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(12): 1276-1281.
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