摘要
提出了一种通过动态应变的测量进行桥梁低频振动监测的新方法。论述了压电应变传感的原理和理论计算公式,实验研究了不同激振频率下(0.1Hz^40Hz)压电传感元件的动态响应,结果表明其灵敏度高,线性度好,符合桥梁低频振动测量的要求。最后对基于压电应变传感技术的桥梁振动监测进行了仿真研究,验证了该方法的可行性,为工程应用奠定了理论基础。
A new method for bridge low-frequency vibration measurement based on dynamic strain measurement is presented in this paper. Theoretical formula and strain sensing principle of PVDF piezoelectric film was studied. Dynamic sensing properties of piezoelectric sensor in different excitation frequencies （from 0. 1Hz to 40Hz） were experimentally studied. Research results show that PVDF piezoelectric sensor has high voltage-sensitivity and wonderful linearity, which meets the requirement of bridge low-frequency vibration measurement in civil engineering. Bridge vibration monitoring based on piezoelectric strain sensing technology was simulated by MATLAB, simulation results verify that the method presented in this paper is feasible, which lays a foundation for its future application in engineering.
出处
《电子测量与仪器学报》
CSCD
2008年第5期96-100,共5页
Journal of Electronic Measurement and Instrumentation
关键词
压电传感
动态应变
低频振动监测
PVDF piezoelectric sensing, dynamic strain, low-frequency vibration monitoring.
