我国幅员广大,铁路所经之地,仍有无交流电源的地区。在这些地区的臂板信号灯,夜间都是用油灯作为显示光源。信号工人风雪无阻,每天都要登高爬梯摘挂油灯。加之油灯亮度小,显示距离短,容易受气候变化影响,司机不易看清。容易造成停车事故。因此用油灯不仅劳动强度大,而且也直接影响行车安全。西安信号厂研究所通过 The vast territory of our country, where the railway passes, there are still areas without AC power. Arm lights in these areas use oil lamps as light sources at night. Signal workers unobstructed snow every day to ascend the climbing lift pick hanging lamp. Coupled with the small oil lamp brightness, showing the distance is short, vulnerable to climate change, the driver is not easy to see. Easy to cause parking accident. Therefore, not only labor-intensive oil lamp, but also a direct impact on traffic safety. Xi’an Institute of Signal passed