Title :
Ultrasonic imaging of electrical trees in organic insulating materials
Author :
Watanabe, E. ; Yoshizawa, M. ; Moriya, T.
Author_Institution :
Dept. of Electr. Eng., Tokyo Metropolitan Univ., Japan
Abstract :
In this paper, we report that the contour plot or the projection plot of a ball-(or “Broccoli”-) and a bush-type tree in polyethylene can be obtained by mechanically scanning the ultrasonic transducer over the sample and by subsequent processing of the ultrasonic signals reflected from the treeing region. The images of such types of trees were found to coincide with those obtained by an optical method
Keywords :
insulation testing; polyethylene insulation; trees (electrical); ultrasonic imaging; ultrasonic materials testing; ball-type tree; broccoli-type tree; bush-type tree; contour plot; electrical trees; organic insulating materials; polyethylene; projection plot; treeing region; ultrasonic imaging; ultrasonic signals; ultrasonic transducer; Acoustic materials; Dielectrics and electrical insulation; Electrodes; Organic materials; Paints; Polyethylene; Trees - insulation; Ultrasonic imaging; Ultrasonic transducers; Visualization;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.523062
