Structure Of Dynamic Measurement For Pile Foundation Besed On Virtual Instrument

The important hardwares and computer are used to develop a detecting system ofpile foundation mass with software programming based on technology of virtualinstruments.The system is simple，convenient，high efficiency and low cost. It iscomposed of two parts: hardware and software..Hardware of this system includescomputer，sensor, soundcard，and so on. The soundcard，which is a standard layout ofcomputer or USB is used in the system to take the place of data acquisition board.Thekey part of the system is the software which mainly includes driver and applicationprogram. The driver of the system is just the driver of soundcard. Application programis developed by MATLAB software which includes data Acquisition module，waveform display module of real time signal，data storage module and signal analysismodule，and so on. The signal analysis module is set up with MATLAB to ade-noising module acquired，and suitable wavelet base is selected to analyze andprocess the real signal acquired to abstracted useful information，then judges massdefects of pile foundation according to the principle of reflected wave.