一种基于DSP的曼彻斯特Ⅱ码解析系统

Design of a Manchester Ⅱ Decoding System Based on DSP

为提高曼彻斯特Ⅱ码解析系统的灵活性和准确性,降低系统的硬件成本,设计一种基于DSP的曼彻斯特Ⅱ码解析系统。在深入分析曼彻斯特Ⅱ码信号特点的基础上,将经测井电缆传输后曼彻斯特Ⅱ码信号经过调理电路、限幅放大电路和整形及正负分离电路的处理后,送至DSP内部的脉冲捕获单元,最后由软件算法进行解析。实验结果表明:曼彻斯特Ⅱ码解析系统设计合理,满足生产测井过程中常规测井作业的需求。

A Manchester Ⅱ decoding system based on DSP was developed to increase it＇s flexibility, accuracy, and reduce hardware cost. On the basis of analyzing the characteristics of Manchester Ⅱ signal entirely, Manchester Ⅱ signal which is transact by logging cable and processed by conditioning circuits, limiting amplifier circuit, shaping circuit and positive and negative pulse separation circuit can be captured by DSP＇s pulse capture units, then be decoded by software algorithm. Experimental results show that design of Manchester Ⅱ decoding system based on DSP is reasonable and can be satisfied with requirement of production logging and conventional logging.