摩擦副材质对超声波测量膜厚的影响

Influence of Friction Pair Material on Film Thickness Measured by Ultrasonic Wave

设计了一套机械可调式标定装置,基于该装置实验研究了3种摩擦副材质对超声测量精度的影响,并利用COMSOL Multiphysics仿真软件对实验结果进行了分析。结果表明:利用超声波探头得到的膜厚测量值相对误差普遍低于5%,说明探头测量精度较高;利用超声技术测量液体膜厚度时需考虑两侧摩擦副材质对测量精度的影响,两不锈钢板间的膜厚测量精度最高(最大相对误差为5.27%),而两PMMA板间的最低(最大相对误差为10.81%);此外,设计的机械可调式标定装置具有成本低、测量范围广、测量精度高等特点。

So a set of mechanical adjustable calibration devices are designed.The influence of three friction pair materials on ultrasonic measurement precision is studied experimentally based on the devices,and the experimental results are analyzed with the COMSOL multi-physics simulation software.The results show that the relative error of the film thickness measured by the ultrasonic probe is generally less than 5%,indicating that the probe has a high measurement precision.When measuring the thickness of liquid film with ultrasonic technique,the influence of two both sides friction pair material on measurement precision should be considered.The film thickness measurement precision between the two stainless steel plates is the highest(the maximum relative error is 5.27%),while that between the two PMMA plates is the lowest(the maximum relative error is 10.81%).In addition,the designed mechanical adjustable calibration device has the characteristics of low cost,wide measuring range and high measuring precision.