声学时差法流量计在明渠流量测验中的应用

Application of Acoustic Time Transit Flowmeter in Discharge Measurement for Open Channel

声学时差法流量计早已成功地应用于国外的河流流量自动测量,国内已开始试应用,并取得成功。简单介绍了声学时差法流量计的工作原理,仪器组成,详细介绍了实际应用方式,并与H-ADCP进行了精度比较,得出时差法的测速准确性高于多普勒法。但应用时差法流量计时,要注意考虑安装和防护问题。声学时差法流量计适用范围广,性能好,是一种可以推广的河流流量自动测量仪器。

During the early years, acoustic transit time flowmeters have been successfully applied in overseas river discharge measurements, and later they have been successfully to used in china. The article briefly describes working principle of acoustic transit time flowmeter, instrument component, and actual application mode in detail. By comparing precision between acoustic transit time flowmeter and H-ADCP, it is shown that precision for velocity measurement by transit time method is much higher than that by Doppler method. But instrument installation and protection needs to be considered when acoustic transit time flowmeter being used. Acoustic transit time flowmeter of wide application and high performance it is a kind of automatic river discharge measurement instrument that can be widely promoted.