气体对于超声波流量计影响及其修正的实验研究

超声波流量计在测量液体流量时,往往要求管内是充满状态,但在实际应用中,常常出现液体中含有气体,从而造成测量偏差。为了能够修正该偏差,提出了多传感器组合使用,进行修正的方法。对管道中充满液体时,使用FDT—21超声波手持流量计进行流量标定;在含有气体状态下,使用38 k Hz的超声波发射及接收装置,测量不同含气量研究不同安装方式对于含气流量的测量影响,从而实现含气状态下水平管道中流量的修正。结果表明:水平管道液体流动时,含气会对超声波流量计测量结果造成误差,通过适当的修正方法可实现超声波流量计流量的测量,偏差大约在2%左右。

Experimental Study on the Influence of Gas onUltrasonic Flowmeters and Correction

Ultrasonic flowmeters often require the tube to be filled with liquid when measuring the flow of liquid. However, in practical applications, the liquid often contains gas in the working state, causing measurement errors. In order to be able to correct this deviation, this paper proposes a method of combining multiple sensors for correction. First, the FDT-21 ultrasonic hand-held flowmeter was used to calibrate the flow when the pipe was full of liquid, and then using 38KHz ultrasonic transmission and receiving device was used to measure different gas contents, and the effect of different installation methods on the gas flow measurement was studied, to correct the liquid flow measurement in the horizontal pipeline under gas conditions. Finally, it can be concluded that when the horizontal pipeline is full of liquid flow, It is concluded that that the measurement results of the ultrasonic flowmeter will cause errors when the gas is contained, but the correction method can make it about 2%.