时号灯自动备用电路

光记录倾斜观测的时间服务很重要。根据观测工作实际的需要，优化设计并制作了时号灯自动备用电路装置。在原时号灯部分发生故障时自动启用备用时号灯，直到故障处理后为止，并以LED发光警示。提供了电原理图，介绍了工作原理、性能特点、使用效果。实践表明，该装置质优高效，价廉便用，可进一步提高观测质量，减轻工作负担，并可在地磁等光记录观测中应用。

Automatic spare device for time signal lamp

Time service is very important for the incline observation of light record. The time signal lamp is designed according to the practice of the observing task. If the original lamp goes wrong, the spare time signal lamp works automatically until the original is repaired. Warning signals is also sent with LED. The circuit diagram and d the working principles, function feature and effects of the device are present in this paper. It has been proved in practice that this device is of good quality and high efficiency, but cheap and easy to control. It improves the effect of observation, as well as lighten work burdens. And it can also be used in light-recording observation of geomagnetism and some others.