随钻测量中连续波动信息解调技术研究与实现  

Research and Implementation on Continuous Wave Information Demodulation Technology in Measurement While Drilling

作　　者：袁泉[1] 李德志 王振永[1] 郭庆[1] 吕海波 YUAN Quan;LI De-zhi;WANG Zhen-yong;GUO Qing;LU Hai-bo(School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001,China)

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《北京理工大学学报》2017年第11期1195-1199,1210,共6页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61571316)

摘　　要：为了解决随钻测量系统连续波动信息传输问题,设计了一种连续波动信号2DPSK解调方案.分析了随钻测量系统传输特性并建立了数学模型.根据随钻测量系统信息传递特性,对一系列连续信号调制技术进行了分析比较,得出2DPSK信号更加适用于井下连续波动信息的调制.对井下噪声干扰类型与来源进行分析,确定了利用数字滤波器算法实现连续波动信息解调系统的去噪.根据以上分析,提出了MWD的2DPSK解调系统的硬件实现方案,并利用FPGA对连续波动信息实现了解调.解调结果表明,在白噪声信道下,解调系统可以准确恢复出发送端的调制数据,具有一定的适用性.To solve the continuous wave information demodulation problem of measurement while drilling（MWD）,a kind of 2 DPSK demodulation scheme for continuous wave was proposed.Analyzing the transmission characteristics of measurement system with drilling,a math model was established.According to the characteristics of measurement system,a series of continuous signal modulation techniques were analyzed and compared,showing the suitability of 2 DPSK signal for continuous wave information modulation under well.Then,the types of the underground noise were analyzed and a digital filter algorithm was designed for the continuous wave information demodulation system.According to the above analysis,an implementation scheme of the 2 DPSK demodulation system was determined and the continuous wave information demodulation was achieved with FPGA.The results show that the demodulation system can recover the initial data accurately in the white noise channel.

关 键 词：随钻测量 连续波动信息 2DPSK FPGA 

分 类 号：TN763.1[电子电信—电路与系统]