【摘要】 本文介绍了实验室内用于测量流量和含沙量的超声波液位测定系统．此系统采用气介式方案，选用复合材料高频换能器作为超声波发射＼接收器件，结构简单，静态测量时测量误差在150mm范围内不超过1mm，并可与微机进行远距离通讯．更多还原

【Abstract】 Presented is a laboratory adapted ultrasonic liquid level measuring system to be used for flow and silt content measurements.We use high frequency piezo-composite transducers to transmit and receive ultrasound through the air.The system is very simple,has high resolution and can communicate with a computer through long distance.更多还原