In the evaluation of personnel damage effectiveness,the value of somatosensory shock wave is one of the important damage criteria.To improve the accuracy of shock wave testing on personnel surface and ensure the advantages of sensor's impedance matching,a shock wave testing technique based on flexible membrane and impedance matching has been proposed,and experimental research was conducted on the influence of bonding materials with different hardness on shock wave overpressure measurement.Firstly,shock wave calibration experiments were conducted on the PVDF sensor on rigid surface to obtain the electromechanical response relationship of the PVDF sensor.On this basis,PVDF sensor using polyurethane rubber with four different hardness as bonding materials were loaded with different strength shock wave.The experimental results showed that compared with PVDF directly bonding to biological tissues,the bonding material with a hardness of 50A could improve the influence of lateral effect and keep the sensitivity coefficient of the sensor basically constant.However,when the hardness of the bonding material increased to 70A and 90A,the nonlinearity of measurement increased by 22.6%and 30.2%,respectively.
body surface shock waveadhesive materialcharacteristic impedancepolyvinylidene fluoride film
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