随钻脉冲曼码信号处理研究  

Research of Manchester code signal processing in measurement while drilling

作　　者：刘天时[1] 魏雨[1] 赵越[1] 邱彬[2] 

机构地区：[1]西安石油大学计算机学院,陕西西安710065 [2]西安石油大学电子工程学院,陕西西安710065

出　　处：《传感器与微系统》2016年第2期29-32,共4页Transducer and Microsystem Technologies

基　　金：陕西省自然科学基础研究计划资助项目(2012JM8037);西安石油大学优秀硕士学位论文培育资助项目(2014YP130612)

摘　　要：随钻测量过程中,井下随钻测量信号通过钻井液脉冲方式传输到地面,地面采集到的信号往往包含了各种噪声和干扰,为了正确地恢复源信号,采用基于最小均方的自适应噪声对消算法。同时,利用改进锁相环方法来正确地恢复时钟,寻找准确的采样点。通过现场采集的钻井液脉冲信号进行验证,曼码信号处理能成功恢复码子,还原有效信息。Drilling fluid telemetry system is particularly adapted for telemetry of information from the bottom of a borehole to the surface by mud pulse systems,but the signal often contains a variety of noise,in order to correctly recover the original signal,based on least mean-squares adaptive noise canceling algorithm is adopted. At the same time,applying an improved phase-locked loop method to correctly recover clock,and look for accurate sampling point. By drilling fluid pulse signal acquired on the field,it is verified that the Manchester code signals processing can recover the original code accurately and restore efficient information.

关 键 词：随钻测量 曼码 最小均方 时钟恢复 自适应噪声对消 

分 类 号：TN911.7[电子电信—通信与信息系统]