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고병훈,박영,정호성,권삼영,박현준,Ko, Byeong-Hun,Park, Young,Jung, Ho-Sung,Kwon, Sam-Young,Park, Hyun-June 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.11
The ice coats are built on 25 kV overhead contact wire when the temperature is lower than $0^{\circ}C$. It generates shockwaves at the mechanical interface of the collecting strips of the pantograph and the contact wire. The de-icing processes should be performed to avoid shockwaves which are generated by a pulsed high-voltage arc discharge. This paper presents temperature analysis of the de-icing effects which could be applied to the overhead contact wire of railways using Joule heat. The results show that 350 A is the proper current for $0^{\circ}C$ conductor according to environmental condition such as velocity of air stream, ambient temperature and moisture.
박영(Young Park),조용현(Young Hyeon Cho),권삼영(Samyoung Kwon),이기원(Kiwon Lee),박현준(Hyunjune Park),나해경(Hae Kyoung Na),고병훈(Byeong Hun Ko) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
In electric railway, image monitoring using high speed camera provides reliable, timely information of wear and geometry status, important in taking decisions for overhead contact wire maintenance. The contribution of this research is the development of a simple real-time monitoring system for use in measurement subsystem of contact wire and geometry of overhead contact wire in electric railway. The system has been consists of a high speed CMOS camera with resolution 1024 × 1280 pixels, line type laser source and PC-based image acquisition system with PCI Express slot. Vision acquisition software have been used in application programming interface for image acquisition, display, and storage with a frequency of sampling of 500 acquisitions per second.