摘要
以井下长缆数据传输为研究对象,设计了以曼切斯特编码构成的传输系统。利用FPGA器件设计编解码器,系统中的编码头兼具同步与极性识别的特征,时钟管理系统为解码提供了重要的时钟信号,充分利用FPGA自身资源,以高速计数器的使用实现同步时钟信号的恢复并生成解码时的采样信号。通过变压器增强驱动能力实现电气隔离。在数千米的长缆传输中,整体系统的信号传输质量得以提高,布线过程更加便利。
The downhole long cable data transmission system with manchester encoding is designed. The codec system is designed with FPGA. The head of the coding system both has synchronization signal and the polarity identification. clock management system uses the high-speed counter to achieve the recovery of a synchronizing clock signal and generate the sampled signal. These signals are important for decoding. The transformer enhances drive capability and achieves electrical isolation. In several kilometers long cable transmission, the signal transmission quality is improved and the wiring process is more convenient.
出处
《自动化技术与应用》
2013年第9期47-50,共4页
Techniques of Automation and Applications
基金
煤层气地球物理勘探关键技术(编号2011ZX05035)
