Detection of abnormal sound approach bearing
Acoustic detection of bearing anomalies present in two ways. One is the detection method based on acoustic noise, and the other is based on the vibration detection. (A), noise detection method: the noise is less than 20db silencer based environment, the use of high-quality microphones to extract a certain distance and direction of the sound pressure bearing signal, and by a certain method to extract the abnormal sound component abnormal sound is a direct measurement method.