用光纤光栅传感器研究压电陶瓷的特性

Piezoelectric Ceramic Characteristics Using Fiber Grating Sensor

提出了一种利用光纤光栅传感器研究压电陶瓷特性的新方法.该方法采用非平衡Michelson扫描干涉仪对光纤光栅传感信号进行相位解调,通过观测波长漂移引起的相移,从而获得压电陶瓷的位移量与所加电压间的关系.实验分析了迟滞特性和蠕变现象,得到了压电陶瓷的电压-位移特性曲线以及蠕变特性曲线.实验表明,光源功率的波动对压电陶瓷迟滞特性不能造成影响且压电陶瓷的蠕变特性与电压方向无关.

A method for characteristics of piezoelectric ceramics was presented using a fiber Bragg grating sensor.An unbalanced Michelson interferometer was utilized to demodulate the fiber Bragg grating sensor signals.The relationship between the displacement of piezoelectric ceramic and the applied voltage was shown by observing the phase-shift induced by wavelength-shift.The hysteretic and creep properties of the piezoelectric ceramic were demonstrated experimentally,and the applied voltage-displacement curve and the creep curve were obtained.The results show that the fluctuations of light power had no effect on hysteretic,and the voltage direction has nothing with creep.