Experimental Analysis on Sound Sources of Calibrating Acoustic Emission Sensitivity

In the application of acoustic emission (AE) technology, operating frequency and sensitivity of sensor has a decisive role in the results of AE test, and AE Calibration serves as the basis for the calibration of quantitative research. In this paper, three different sound sources of experiment are designed according to secondary calibration of acoustic emission sensors: falling balls, pressuring off pencils and breaking the glass capillary. Through repeated experiments, we firstly measure the pulse sound source signal generated by the three different experiments with different conditions, analyze and compare the real-time features and spectral characteristics (peak value, rise time). Then we determine the most suitable pulse source in the emission sensor sensitivity calibration, and summarize the method of optimizing operation, so as to provide a basis for the evaluation of sound source signals in AE sensor calibration, Finally, the error during the experiment of acoustic emission sensors calibration is also addressed.