基于多载波调制技术的钻杆声传输实验系统研究  

Research of acoustic transmission system along drill pipe based on multicarrier modulation technology

作　　者：张小蓟[1] 孙小亮[1] 张歆[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《电子测量与仪器学报》2010年第10期924-928,共5页Journal of Electronic Measurement and Instrumentation

摘　　要：借助于油井钻杆的声波传输是一种提高随钻数据传输数据率的有效方法,但钻杆的周期性的机械管结构使得其声传输呈现出梳状滤波和色散的特性,严重影响了声传输的可靠性,需要一种有效抗信道时间色散的技术方案。对采用多载波调制的声传输方案进行了研究,利用多载波并行传输的方案来抗信道的多径效应。基于DSP系统构建了钻杆声传输实验平台。实验结果表明采用多载波调制技术的声传输方案具有较高的数据传输率和可靠性。Acoustic transmission along the drill pipes is characterized by comb filtering and time dispersions,because of the periodic cascade of the drill pipes,which has an influence on reliability of the transmission.An acoustic transmission scheme based on multicarrier modulation was proposed,in which data signals with orthogonal frequencies are transmitted in parallel to mitigate the multipath effects of drill pipe acoustic channels,thereby can be transmitted in high rate with lower complexity.The design and experiment of the acoustic transmission platform based DSP system was described.The test results showed that the acoustic transmission scheme based on multicarrier modulation has high data rate and high reliability.

关 键 词：多载波调制 随钻 声通信 声传输特性 

分 类 号：TN919.7[电子电信—通信与信息系统]