On Signal Processing and Testing Wave for Acoustic Gas Temperature and Flow Measurement

Abstract

For acoustic measuring of gas temperature and flow, firstly, a processing method for microphone received signal based on the matched filtering with the pre-whitening to the AR modeled noises achieves good performance through identifying the time-of-flight under noise contamination.Then, the PRK (phase reversal keying) of the M-sequence appears to be proper for the testing signals that are sent into the object. Finally, this system has been validated through experiments.