Abstract：Research purpose: This paper analyzed the online monitoring principle of the subway stray current, preliminarily design the monitor and control system in hardware and software. This paper also proposed the view on how to protect the corrosion of the stray current.
Research method: Combining subway's actual conditions with the deciding target set in standards for the hazards of the stray current, selects polarized potential of the underground metal as the monitor parameter, and utilizes Cu/CuS04 as comparing electrode because of its qualities such as stable voltage, not easy to be polarized, low resistance and mechanical intensity. The core of the system's hardware is the microprocessor based on ARM7 whose high speed and rich connecting sources can easily realize the monitor and control function.
Research result: This paper showed us the online monitor and control system for accurately calculating the metal's corrosive degree and trend under the subway stray current.
Research conclusion: Although the subway stray current is largely corrosive, as long as one can take scientific measures, design reasonable automatic online monitor and control system, effectively reduce the loss of current's corrosion, and one' can ensure the subway's permanent safe operation.
杨立新，邸荣光，刘仕兵. 轨道交通杂散电流腐蚀的监测及防护研究[J]. 铁道工程学报, 2006, 23(1): 19-21.
YANG Li-xin, DI Rong-guang, LIU Shi-bing. STUDY ON THE MONITORING AND CONTROL SYSTEM OF STRAY CURRENT IN URBAN MASS TRANSIT. 铁道工程学报, 2006, 23(1): 19-21.
2006, Vol. 23 
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