基于热容原理的小管径气液两相流传感器设计

Design of Gas-liguild Two-phase Flow Sensor Based on Heat Capacity Principle in a Small Diameter Pipe

为了识别小管径内气液含量,设计了一种参比钿电阻电极、工作铂电阻电极和加热器复合结构的传感器。基于液体与气体热容率不同,在管道进出口设计了柏电阻电极,采用温度调理电路和温度加热电路实现测量,传感器输出高低电压信号可以区别气液含量。实验结果表明,管径内气体体积小于测量管段体积的50%时,传感器输出低电压信号值0 V;管径内气体体积大于测量管段体积的80%时,传感器输出高电压信号值4 V。

In order to distinguish gas-liquid content in small diameter pipe,a sensor of composite structure is designed including reference platinum resistance electrode,working platinum resistance electrode and heater.Based on the different heat capacities of liquid and gas,platinum resistance electrode is designed at the inlet and outlet of the pipeline,temperature conditioning circuit and temperature heating circuit are used to realize the measurement,the output voltage signal of the sensor can distinguish the gas-liquid content.Experimental results show that when the volume of gas in the diameter pipe is less than 50% of the physical strength of the measuring pipe section,the sensor outputs a low voltage signal value 0 V;when the volume of gas in the diameter pipe is more than 80% of the physical strength of the measuring pipe section,the sensor outputs a high voltage signal value 4 V.