一种简单的朗格万传感器预应力估计方法

B. Fu, Tinglong Li, T. Hemsel
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引用次数: 2

摘要

研究了一种简单的朗格万传感器预应力估计方法。测量装置由一个电容器、一个阻抗转换器和一个电压表组成。根据压电方程和基本电路理论,推导出了预应力与电容两端电压之间的数学表达式。然后可以通过测量电容器电压来计算出预应力水平。为了评价该方法的精度,用力垫圈对朗格万传感器的预应力进行了测量。结果表明,该方法测得的预应力水平比洗力仪测得的预应力水平高30-40%。该方法简单,可用于各种朗万传感器的预应力估计。在不同的预应力水平下对d33进行识别,可以提高方法的精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A simple pre-stress estimating method of langevin transducers
A simple pre-stress estimate method of Langevin transducers is studied. The measurement setup consists of a capacitor, an impedance converter and a voltmeter. Based on the piezoelectric equation and the basic circuit theory, the mathematical expression between the pre-stress and the voltage across the capacitor is derived. The pre-stress level can then be calculated out of the measurement of the capacitor voltage. In order to evaluate the precision of this method, a force washer is used to measure the pre-stress of the Langevin transducer. The result shows the pre-stress level obtained from this method is 30-40% higher than the pre-stress level measured by the force washer. This method is simple and can be used to estimate the pre-stress of various Langevin transducers. The precision of this method can be raised if d33 is identified under different pre-stress levels.
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