摘要
针对变电所站内智能设备互联需求,提出了一种半开放结构的智能设备协议转换方法,该方法通过预设置以适应不同的接入智能设备协议规范,差错控制部分采用循环冗余校验(CRC)算法,解决了物理总线上相邻字符的间隔时间识别和抗干扰CRC校验码的快速计算;以P89C669MCU为主控制器设计了协议转换系统并进行了工程运行实验,结果表明,该系统在通信距离0.5km,通信速率9600bps条件下实时转换无误码,在强电磁干扰环境下具有良好的抗干扰性能。
In view of the substation intelligent device interconnection requirements.A half open structure of the intelligent device protocol conversion method is proposed.The method through the preset so as to adapt to different access intelligent device protocol specification. A cyclic redundancy check（CRC）algorithm is adopted in error control.The time interval of adjacent characters recognition on the physical bus and fast calculation of anti-interference CRC check code are solved.The protocol conversion system is designed with P89C669MCU. Project experiments are carried out.The reslut show that the system has no error under the distance of 0.5Km and in communication rate 9600 bps.The system has a good anti-interference performance under the environment of strong electromagnetic interference
出处
《计算机测量与控制》
北大核心
2013年第12期3429-3432,共4页
Computer Measurement &Control
基金
国家自然科学基金(51175052)
关键词
通信
协议转换
微控制器
循环冗余校验
communications
protocol conversion
MCU
cyclic redundancy check
