| Title |
A Study on the Technology Diagnosing Particles with Two Acoustic Emission Sensors Which have the Different Characteristics of Frequency in GIS |
| Authors |
김광화 ; 최재구 ; 선종호 ; 김익수 ; 윤진열 |
| Keywords |
GIS diagnosis ; acoustic emission sensor ; particle ; calibration |
| Abstract |
This paper described about the acoustic wave measurement method to diagnose GIS for particles. We measured and analyzed the signals of acoustic waves with two type acoustic sensors having 125kHz and 50kHz resonant frequency respectively when the particles were bounced on the inside surfaces of GIS tanks by the electrostatic force. To use two sensors for the diagnosis of GIS, we set up the calibration method for this measurement method. We showed the output characteristics of two sensors according to the sizes and materials of particles in the experiment. As the results, the inception voltages bouncing particles depended on the materials and the extinction voltages bouncing them depended on the sizes and materials. We found out that the relationship between sizes of particles and output voltages of sensors didn't have linearity but the ratios of between peak values of two sensors depended on the materials of GIS enclosures and the sizes of particles. |