无人直升机轴频磁场信号检测方法研究  

Research on shaft rate magnetic field signal detection method of the unmanned helicopter

作　　者：范尧[1,2] 王志宇[3] 方广有[1,4] Fan Yao Wang Zhiyu Fang Guangyou(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190 ,China The 3rd Research Institute, China Electronics Technology Group Corporation, Beijing 100016, China)

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国电子科技集团公司第三研究所,北京100016 [4]中国科学院电磁辐射与探测技术重点实验室,北京100190

出　　处：《电子测量技术》2017年第6期180-183,共4页Electronic Measurement Technology

摘　　要：轴频磁场信号是无人直升机在机动飞行时产生的一种重要物理场,是一种难以被隐藏的目标特征信号。通过分析轴频磁场信号能实现对无人直升机的检测和识别,并能监测其运动状态。利用磁场传感器采集无人直升机的轴频磁场信号,并利用短时傅里叶变换算法对实测数据进行时频分析。实测结果表明,无人直升机在机动飞行中能产生特定随运动状态变化的5~40Hz的轴频磁场信号。通过对该特征信号的提取,实现了对无人直升机的准确检测和识别,该探测方法在实测数据的应用中取得了良好的效果。Shaft rate magnetic field signals produced by the unmanned helicopters in maneuver flight is an important physical fields,which is difficult to be stealth.Unmanned helicopters can be detected and identified by analyzing the shaft rate magnetic signal,and the status of the unmanned helicopters can be monitored.In this paper,the magnetic field sensors are used to detect the shaft rate magnetic field signals of the unmanned helicopters.Short time Fourier transform for time-frequency analysis is applied to deal with the measured data.The testing results show that the specific shaft rate magnetic field signals of 5-40 Hz which are related to unmanned helicopter＇s status are generated in unmanned helicopters maneuver flight.According to the characteristics of the signal,detection and identification of unmanned helicopters are realized.The detection method has a good effect in the real data application.

关 键 词：无人直升机 轴频信号 磁场传感器 短时傅里叶变换 

分 类 号：TN911.7[电子电信—通信与信息系统]