提出了一种新型PZT的动态调制光纤光栅应变力测量技术。把光谱仪对峰值波长移动的测量改变为示波器对峰值光功率时间间隔的测量 ,并对这种技术进行了理论分析和实验研究。用交变电压调制固定在光纤光栅上的PZT ,同时对施加在光栅上的应力进行测量。实践证明 ,测光脉冲时间间隔法与光谱峰值移动法的测量结果相同 ,而且两者与理论计算结果相符 A novel PZT dynamic modulation FBG strain measurement technique was proposed. The spectrometer changes the measurement of the peak wavelength shift to the oscilloscope measurement of the peak optical power time interval, and makes a theoretical analysis and experimental study on this technique. The alternating voltage is used to modulate the PZT fixed on the fiber grating while measuring the stress applied to the grating. Practice has proved that the metering pulse time interval method and the peak value of the spectrum shift measurement results are the same, and both consistent with the theoretical calculation