基于FPGA的曼码编解码模块实现  

Implementation of Manchester Encoding And Decoding Module Based on FPGA

作　　者：张儒[1] 李敏[1] 

机构地区：[1]中海油田服务股份有限公司,北京101149

出　　处：《仪器仪表用户》2016年第3期53-55,共3页Instrumentation

摘　　要：本文提供了一种基于FPGA的曼彻斯特码编解码模块,利用FPGA进行曼码的编解码,完成单芯测井系统的通讯传输。整个系统主要分为编码模块和解码模块。测井过程中,地面系统通过编码模块产生命令信号,经过驱动电路和电缆后,发送到井下仪器。井下仪器将采集到的数据,经过电缆,驱动电路,发送到地面系统。地面系统通过解码模块恢复成原始数据。与采用专用编解码芯片相比,该方案成本更低,而且根据需要进行功能扩展,更加灵活。该解码方式已经在多个实际测井作业中成功运行,具有良好的工程实用价值。In this paper, a FPGA based encoding and decoding module is provided, using FPGA to encode and decode the Manchester code, and complete the communication transmission of the logging system. The whole system is mainly divided into encoding module and decoding module. In the process of logging, the ground system generated command signals through the encoding module, after driving circuit and cable, sent to the underground instrument. Downhole instrument will collect the data, through the cable, drive circuit, sent to the ground system. The ground system is restored to the original data through the decoding module. Compared with the use of dedicated codec chip, the program is lower cost, but also according to the need for functional expansion, more flexible. The decoding method has been successfully applied in a number of practical logging operations, and has good engineering practical value.

关 键 词：曼彻斯特码 FPGA 编码 解码 

分 类 号：TP[自动化与计算机技术]