Waseda University · 공학
요시미치 오끼 교수의 연구실은 고온 및 방사선 노화에 의한 고무 및 절연재의 물리화학적 특성 변화를 분석하며, 특히 실리콘 고무와 폴리머 절연 케이블의 노화 거동과 신뢰성 향상을 목표로 합니다. 주로 주파수 도메인 반사도 측정과 역 푸리에 변환 기반의 고정밀 고장 위치 진단 기술을 개발하여, 고온 부위나 손상 부위를 정밀하게 식별하는 데 초점을 맞추고 있습니다. 이는 전력 및 통신 케이블의 수명 연장과 안정성 확보에 기여하는 응용 연구입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Cable‐grade silicone rubber was aged thermally or by combining heat and gamma‐ray radiation, and resultant changes in chemical, thermal, mechanical and electrical properties were examined. The experimental results obtained in these analyses are clearly consistent with the mechanism that silicone rubber is degraded by forming cross‐linked structures via formation of abundant siloxane bonds. With further progress of degradation, decomposition becomes dominant. Reflecting these mechanisms, mechanic
The authors have demonstrated that the estimation of the precise locations of points in cables aged thermally or mechanically or by the irradiation of gamma rays is possible by a combination of frequency domain reflectometry and inverse fast Fourier transform. This paper examines how this ability of fault location depends on the type, structure, and insulation material of the cable, using several kinds of polymer insulated cables such as a triple core cable insulated with flame-retardant ethylen
This paper demonstrates that it is possible to locate very precisely a point showing a high temperature in a polymer insulated cable. The method is based on frequency domain reflectometry and inverse fast Fourier transform. The cables tested are a coaxial communication cable with a length of 32 m insulated by low density polyethylene and a flat in-house electric cord with a length of 21 m insulated by polyvinyl chloride. The cable or cord was heated at different positions for different lengths.
