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Piezoresistance Characteristics of Ytterbium Foil Stress Sensor Under Dynamical Load

YANG Ji-xiang,YU Shang-jiang(The Third Academy of Engineer General Straff,Luoyang 471023,China)  
The ytterbium foil stress sensor is calibrated by using gas gun,the piezoresistance characteristics under dynamical load is studied,and the calibration fitting equation and linearity error are given in this paper.By experimental research,the sensor is testfied to have many merits such as wide measuring range,high frequency response,high linearity and low temperature coefficient.The sensor can be widely applied to the stress measurement in concrete or rock under shock load.
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