Research on Methods of Weak Signal Processing in Strong Noise
Liu Xu-fei · 2012
In the signal detection for mechanical equipment,the useful signal very weak but the noise signal very strong.It bring some difficulty to signal detection and processing.According to the problem,the weak signal detection method of corrlation detection and self-adapting filter are used,the weak signals are detected from noise.First of all,the principles of correlation detection and self-adapting filter are introduced,It emphasis on the method of de-noising and structure of correlation detection and self-adapting filter.The methods of time domain and frequency domain are used to pick up weak signal.Finally,the method has confirmed on mechanical experiment table,the experiment result indicate that both correlation detection method and self-adapting filter are able to de-noising and pick up effective signal.