关键词: 道口遮断信号机, 点灯电路, 主灯丝断丝报警, 继电器

Abstract: At present, the vast majority of the existing crossings in China are not equipped with centralized monitoring equipment, so it is impossible to monitor and alarm for the on-site crossing signaling equipment. Through circuit analysis, it is found that the lighting circuit of obstruction signal lacks the audio alarm function for the burnout of main filament, which can not meet the requirements of technical conditions and specifications, and there are great potential safety hazards. In view of the problems found, this paper puts forward two schemes: setting diode or the repeater relay of DZJ to improve the lighting circuit of obstruction signal. The improved lighting circuit is more rigorous and safer, which improves the traffic and transportation safety of railway crossing to a new safety height.

Key words: level crossing obstruction signal, lighting circuit, alarm for , main filament burnout, relay