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针对建筑工地危险地段警示、道路施工临时警示、海上灯塔警示等可能需要整晚照明,地下通道需要24小时照明,这些特殊地段的照明灯具是不允许“损坏的”。为了解决这个难题,可以使用应急灯电路,但应急灯一般不能坚持多长时间照明;另一个思路,设计一套备用照明电路,利用干簧管检测主灯具的通断,通断信号控制备用灯具点亮,同时发出声音报警,提醒工作人员及时更换损坏的主灯具,实现只要供电正常可以24小时不间断提供照明服务。该设计不同于应急灯模式。
Hazard warnings on construction sites, temporary warnings on road construction, marine beacon warnings, etc. may require night lighting and underground passage takes 24 hours to illuminate. Lighting fixtures in these special lots are not allowed to be “damaged.” In order to solve this problem, you can use the emergency light circuit, but the emergency light can not insist on how long the general lighting; another idea, the design of a backup lighting circuit, the use of reed switch detection of the main light off, off signal control spare lamps Lit, at the same time audible alarm to remind staff to promptly replace the damaged main lamps, as long as the normal power supply can provide 24-hour uninterrupted lighting services. The design is different from the emergency light mode.