音响传感器的振动特性及非线性度测量

THE OSCILLATORY CHARACTERISTIC AND MEASUREMENT OF THE NON-LINEAR DISTORTION OF AUDIBLE SENSOR

对于应用十分广泛的音响振动传感器，以机电类比的分析方法分析得出了机电类比等效线路及有关参数。并应用所得等效线路对振动传感器的固有振动特性和迫振特性作了详尽的理论分析。文章还介绍了影响非线性失真的主要因素，阐述了简单适用的“电动机”式非线性失真的测试电路及其原理，并论证了振动传感器在“电动机”运行状态下非线性度测试结果适用于“发电机”运行状态。

This paper analyzes the widely used audible vibrating sensor in a mechanical-electro comparative way,obtains the equivalent circuit and itS relevant parameters and makes a derailed analysis oftile natural oscillation and forced oscillation of vibrating sensor. This paper also introduces the mainfactors effecting on the non-linear distorhon,expounds a testing circuit and its principle for the nonlinear distortion in the 'motor-state'and demonstrates that the measured results in the 'motor-saute'aresuitable for the'senerator-state'.