Research of Acoustic Emission Characteristics Based on the Signal Parameters

This work is focused on acoustic emission characteristics measurement based on monitoring systems of PCI-2 on a rotating test-bed. The AE signals parameters such as amplitude, rising time, energy, the average frequency and et al were measured when different AE signals spread in the various paths. The common used AE signals are created by metal impact, the pencil lead breaks and friction. The relationship between the amount of AE signals and AE sources are recorded. The signal amplitude is close to the linear attenuation and the peak frequency becomes lower with the distance. The partial power changes a lot when the AE signal spreads from aluminum to steel material. This work would guideline the AE sensor optimum and the fault location determine for the machine fault diagnosis.