一种基于FPGA的开关信号可靠传输实现方法  

Scheme based on FPGA about reliably transferred switch signal

作　　者：何绪泉[1] 施扬[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2005年第4期316-319,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：提出了一种在自动控制系统中,利用大规模逻辑器件实现开关信号可靠传输的硬件实现方法。对开关信号进行直接编码,采用3个连续出现的大码距字节表示开关信号的一个状态,编码后的信号利用电信网的数字中继线路传输。解码时只有在收到3个连续编码字节后才输出相应信号值,其他情况维持不变以排除线路误码、故障造成的误动作,保证传输的可靠性。给出了总体实现方案、编码方案及编码、解码的实现方法,并给出了详细的状态机转移图。仿真结果表明,达到了预期的设计目标。实现方法具有纯硬件实现、不需软件参与、时延固定、具有较高的系统可靠性等特点。A scheme was put forward based on FPGA about switch signal transferred reliably using largescale intergraded-circuit in automatic control system. The switch signal was encoded directly and one state was expressed with 3 long distance sequence code, then it was transmitted through the digital relay line of telecommunication network. Only when 3-continuous code was received, would the signal value be output. In other cases it maintained and removed failure caused by line error and missoperatlon, so transmitted to guarantee reliability. Overall realization scheme, encoding and decoding scheme, and state machine design scheme were presented in detail. Simulation result indicates the anticipated design goal is reached. This scheme has such characteristics as being realized by pure hardware, free from software, fixed delay time, and higher system reliability.

关 键 词：开关信号 可靠传输 有限状态机 远程自动控制 

分 类 号：TN919.3[电子电信—通信与信息系统]