泥浆管道的多普勒超声流量计实验

An Experimental of Doppler Ultrasonic Flowmeter for Mud Pipeline

为了监控泥浆管道是否发生泄露,基于多普勒效应设计了一种应用于泥浆管道的可多频率复用的超声波流量计系统。首先进行0.5和1 MHz的超声波换能器设计,完成相应的硬件电路绘制和软件程序编写,研制出流量计样机,最后在实验室进行了气液两相流模拟实验。实验结果表明:慢流速下(0.83~0.89 m/s)实测频差与综合流速的线性相关系数为0.9935;快流速下(1.86~1.94 m/s)线性相关系数为0.9951,线性度良好且频差分辨率可达1 Hz;40 min的同一流速长期测量,检测标准差为5.6704,稳定性良好。

In order to monitor whether the pipeline leakage,a multi-frequency multiplexable ultrasonic flowmeter experimental system based on the Doppler principle is designed.Firstly,the ultrasonic transducer design of 0.5 and 1 MHz is carried out,and then the corresponding hardware circuit drawing and software program writing are completed to develop a practical application of the flowmeter prototype.Finally,a gas-liquid two-phase flow simulation experiment is conducted in the laboratory using the prototype.The experimental results show that the linear correlation coefficient between the measured frequency difference and the integrated flow rate is 0.9935 for slow flow rate(0.83-0.89 m/s)and 0.9951 for fast flow rate(1.86-1.94 m/s),with good linearity and frequency difference resolution up to 1 Hz;the standard deviation of detection is 5.67045 for long-term measurement at the same flow rate for 40 min.It has good stability.