摘要
本文结合基于现场总线的测试网络实例,分析了影响长线传输距离的几个关键因素,并提出了针对远程通讯中抑制信号衰减及抗干扰等措施。这些方法的采用,使以双绞线作为传输介质的单片机系统之间通讯距离提高到15km,在2400bps的码流下,平均误码率降至1×10-10,保证了数据传输过程的稳定性和可靠性。
Several key factors which affect the distance of lo ng-distance communication,together with an example of measurement network ba sed on Field Bus are analyzed in this paper.The methods such as anti-jamming a nd rejection of attenuation are also dis-cussed.The application of the methods proves that the distance of communication between microchips is about 15km,a nd decrease the average rate of error code to1×10-10 when the communication rate is2400bps.It can be proved that the methods ensure the stabili-ty and reliability of data communication in the system.
出处
《电测与仪表》
北大核心
2003年第2期43-46,共4页
Electrical Measurement & Instrumentation
关键词
长线传输
FSK数字频率调制
信号衰减
抗干扰
long-distance communication
FSK digital frequency modulate
signal at tenua-tion
anti-jamming
