关键词: PVF2 膜传感器, 动测, 桩尖

Abstract:  In this paper a highly accurate system for dynamic measurement of model pile was installed．
A new type of force transducer—piezoelectric polyvinylidence fluoride （PVF 2 ） film and a grating dis-
placement sensor were used to measure the force and displacement at the pile toe respectively for the
first time．The system can be used to synchronously measure 4signalsi．e．the force and displace-
ment at the pile toe as well as the force and acceleration at the head of pile when the pile is subjected to
an axial impact load．It is verified that the signals from the transducers is well coincident with the cal -
culated solutions．The system would be an ideal one to study mult- i parameter dynamic measurement of
model pile by stress wave theory and the resistance model of the pile toe．

Key words: PVF2 film sensor, dynamic measurement, pile toe