多介质温压可调超声波声速测量系统设计

Design of ultrasonic velocity measurement system for multi-medium and adjustable temperature and pressure conditions

本文设计了一套多介质温压可调的超声波声速测量系统,该系统设计的控温范围为常温~90℃、控压范围为常压~4MPa,可在静态状态下充入气体和液体介质,实现超声波在该介质中传播速度的测量.采用游标卡尺鉴相法对声速进行测量,可以达到0.000589rad的测量精度.分析了测量容器内压力变化和温度变化对声速测量的影响.以水和空气为介质,开展了不同温度和压力下一系列声速测量实验,获得了某一温度下的压力-声速曲线和某一压力下的温度-声速曲线.实验结果表明,所设计的多介质温压可调超声波声速测量系统可对超声声速进行有效测量.

An ultrasonic velocity measurement system for multi-medium and adjustable temperature and pressure conditions is designed.The temperature can be controlled ranged from ambient temperature to 90℃and the pressure is from ambient pressure to 4MPa.The measurement of the ultrasonic velocity is conducted statically in a vessel in which the liquid or gas is filled.The method of vernier caliper phase meter is employed to measure the ultrasonic velocity,and the measuring accuracy of phase is relatively high and can reach to 0.000589rad.The influence of the temperature and pressure on the ultrasonic velocity is investigated.Serials of experiments are car ried out by using water and air as the medium.The pressure-velocity curve in given temperature and the temperature-velocity curve in given pressure are obtained.The Ultrasonic Velocity Measurement System for Multi-Medium and Adjustable Temperature and Pressure Conditions is effective.