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APPLICATION OF PVDF GAUGES TO DYNAMICAL STRESS MEASUREMENTS

Xi Daoying;Zheng Yonglai(University of Science and Technology of China,Hefei Anhui,230026)  
Polyvinylidene fluoried(PVDF),as a new type of piezoelectricity material,ishighly sensitive to compressive stress.In this paper,the dynamical calibration and frequency re-sponse properties of PVDF gauges are discussed-Comparing the compressive pulse measured with PVDF gauges with that of strain gauges,we can find that the former has smaller noise signal thanthe latter and its response time is almost the same as that of the latter,and its frequency responsedistribution is wide. PVDF will be suitable for wide variety of applications for its good properties.The compressive pulses measured with PVDF gauges placed in aluminum and rock bar specimens are given too.
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