两种典型扭振式粘度测头的灵敏度对比分析

The Comparison Analysis of Two Typical Torsional Vibration Viscosity Probe Sensitivity

针对扭振式粘度测量中,不同测头形状所受到的粘性力不同,进而对测量灵敏度产生影响的问题,基于FBG扭矩微振粘度测量原理,研究柱形与球面两种测头装置的测量精度及灵敏度。通过对不同形状的测头建立数学模型,得出相应的电压-粘度关系式,在实验室环境下通过标定实验确定待定系数,并比较两种测头的测量特性。实验数据表明,柱形测头的测量精度及灵敏度高于球面测头,验证了理论分析。同时,对测量误差来源进行了分析,为后续研究提供了理论基础。

Aiming al the problems in torsional vibration viseosity nleasurenlent that sensitivily is influenced hy different shapes of probe subjected to different viscous force,the measuring ac.uracv and sensilivitv of cylindrical I）rohe and spherical inbe are studied acording to the principle of viscosity measuremenl hase（I on FBG mivro- lorsinnal vih,ntion. Through the nlathematical model buih fir different prohes,corresponding voltage-viscosity frmt, las are derived,then in abratol7 environment,the undetermined coefficient is got from calibration experiment, and the measuring haraeleristics are compared between the two probes. The eXllerimental data shows that vylindrical role is more accurate and more sensitive than spherical probe,which refitting the theo,＇etieal analysis. At the same time,we also analysis tile measuring emn sources to provide theoretical basis for the further study.