A study on the technology applying the acoustic wave measurement to diagnosing particles in GIS [II]

GIS 이물진단을 위한 초음파 측정 적용기술연구(II)

This paper described the outputs of acoustic sensors due to the vibration of particles in the mock up GIS. We used the two type of acoustic sensors which had 150kHz resonant frequency and 60kHz resonant frequency respectively. In the experiment of the mock up GIS, we paid attention to the magnitude and attenuation of sensor outputs due to particles. In this results the output of each sensor in frequency characteristic depended on the material of GIS tank and the output of sensor in magnitude characteristics depended on the size of particles and dropping height.