通用型紧急指令传输接口优化设计

Design of optimizing the universal emergency instruction transmission interface

针对用电平型信号作为紧急命令传输可靠性低的问题,分别从硬件和软件两方面进行了优化设计。在硬件方面,通过对相关参数的理论计算,采用光继电器发送指令,经过电缆用光电耦合器接收指令的电路组合;在软件逻辑方面,将紧急指令以连续脉冲形式发送,经过冗余设计后,对收到接收端FPGA的指令进行滑窗判别,保证指令在接收后判别的可靠性。经测试,优化后的指令传输接口设计简单、功耗低、应用广泛,能实现紧急指令在80 m电缆下长期可靠地传输。

For the problem that the level signal is low reliability of emergency command transmission,it is optimized from both hardware and software.In terms of hardware,through the theoretical calculation of the relevant parameters,the optical relay is used to send commands,and the circuit optical coupler is combined with used to receive commands through the opto-coupler to accept the command cable.In terms of software logic,the emergency command is sent as a continuous pulse.After the redundant design,the instruction of the FPGA of receiver receiving is judged and identified by the sliding window operation to ensure the reliability of the command discrimination.The optimized instruction transmission interface after testing has the characteristics of simple design,low power consumption and wide application,which can realize longterm reliable transmission of emergency instructions under 80 m cable.