Design of dynamic restricted speed sign based on AT89C51 microcontroller
Zhu Xiu · 2004
The paper analyzes the human and material resources wastes resulting from static speed-restricting sign left behind by railway line maintenance or hidden insecurity trouble due to neglect. The paper introduces the design of dynamic speed-restricting sign using AT89C51 and photo electricity sensor and magnetoelectricity sensor. Dynamic speed-restricting sign has two working of timing and time. Microcontroller controls motors turning to change the value of restricted speed using the program. It presents easier operation, more stable performance and credibility and allows train safe operation of trains.