duplex computer system

The paper introduces the principle of frequency measure based on double-counter and multi-periods pulse synchronization method,and the designing with microprocessor is offered.

介绍了双计数器多周期同步法频率测量原理,给出了用单片机实现的具体实现方案。

Base on the bi-CPU flying control system,a safe retrieving system for unmanned airplane is designed.

文中介绍一种基于双计算机设计的无人机安全回收系统,主要是解决飞机在飞行过程中飞行的正常与否或计算机工作正常与否的情况下的安全回收问题。