Data collection and analysis of high frequency damped oscillation waves

Christine Smit

Mentor: Professor Craig Grimes

 

            The goal of this project is to acquire data for off-line analysis.  The data consists of high frequency, damped oscillation waves that must be sampled, digitized, and stored at a rate fast enough to maintain the frequency content of the signal.  Currently, a board has been designed to analyze the signal in real time using a frequency counting technique.  This approach is very fast, but can only analyze low noise, single-frequency signals.  Data stored on a computer can be analyzed using techniques which can filter out noise and see multiple frequencies simultaneously.

            The data will be acquired through an ADSP-21992 chip.  This DSP chip can run at a maximum speed of 160 MHz and can digitize signals at a maximum rate of 20 MHz.  The goal will be to maximize to speed of the data acquisition and transfer to the computer.  Once the data has been acquired, it will be analyzed using FFTs and correlation techniques.