Existence of hydrodynamic pressure in asphalt pavement will create the water damage in asphalt pavement

accelerate pavement service performance weakening

and have a harmful effect on car running safety.An effective path of researching water damage is to measure hydrodynamic pressure accurately.The fundamental principle of the piezoelectric sensors is briefly introduced.On the basis that piezoelectric sensor system ensures continuous gathering of dynamic piezoelectric data

the homemade piezoelectric sensor is designed

and its calibration and field test are performed to real-time analyze the dynamic data.Experimental results show that the dynamic hydraulic pressure increases with the increment of car’s speed.The dynamic hydraulic pressure in asphalt pavement is 0.35 MPa while a car moves at the speed of 96 km/h.The application of piezoelectric sensors in measuring hydrodynamic pressure will help to solve or reduce the water damage in pavement.