基于软件无线电的缺陷信号的无线传输  

The Wireless Transmitting for the Flaw Signals Adopting SDR

作　　者：沈兆鑫[1] 何辅云[1] 张艳[1] 

机构地区：[1]合肥工业大学计算机与信息学院,合肥230009

出　　处：《现代计算机》2005年第11期62-64,68,共4页Modern Computer

摘　　要：在对大直径超长钢管、钢棒的无损检测(NDT)中,用多通道旋转探头来采集信号,用滑环来传送信号,由于滑环同时又要传送磁化电流,这就给传送的可靠性带来了问题。本文在分析了基于滑环传送方式中存在问题的基础上,提出了基于软件无线电的缺陷信号的传输方式,将磁化电流和缺陷信号分开传送,经实践验证该方法能有效解决原系统中存在的缺陷,并且传送信号的准确度有了很大的提高。In the process of the NDT to big steel tubes, we use multi-channel whirly sensors array to collect flaw signals and use sliding loops to transmit them. It will bring big problems to the reliability of the transmitting, because the sliding loops have to transmit the magnetizing currents at the same time. On the base of analyzing the defects of the transmitting adopting sliding loops, this paper provides a new way to transmit the flaw signals adopting SDR, the new method separates the magnetizing currents from the flaw signals, it is proved that the new method of transmitting can solve the problems that exist in the old system and improve the precision greatly.

关 键 词：SDR DSP 数字中频 数字上/下变频 射频前端处理 软件无线电 缺陷信号 无线传输 传送信号 磁化电流 

分 类 号：TN925[电子电信—通信与信息系统]