摘要
金属目标探测在应用领域中受环境噪声干扰大,目标金属壳体反射信号和噪声直耦信号叠加,导致金属目标探测准确度提高困难。提出一种基于自适应噪声抵消降噪算法和能量检测的金属目标探测方法。借鉴相位检波设计能量检测算法最终完成针对金属外壳小车的目标探测系统设计。外场系统测试和仿真实验分析得出目标在各种距离和速度下通过探测样机的探测特性测试结果,测试结果展示了系统具有较好的探测性能,探测反射信号与距离的关系跟磁场衰减的理论值高度吻合,达到预期的检测效果。
According to the application environment of metal target, the interference noise was strong, and metal reflection signal added to the direct coupling noise, resulting in difficult to improve the accuracy of metal target detection. An im-proved metal target detection method based on adaptive direct coupled noise reduction and energy detection algorithm was proposed.The metal target detection system for the car was designed completely. Experiments and simulations were imple-mented with different distance and different speed for the metal car and detection device. The simulation results shows that the system has good detection performance and the relationship between the detected reflected signal and distance is in ac-cordance with theoretical value of magnetic field attenuation. It meets to the predicted detection effect.
出处
《科技通报》
北大核心
2014年第6期73-75,共3页
Bulletin of Science and Technology
关键词
金属目标
直耦噪声
能量检测
信号处理
metal target
direct coupled noise
energy detection
signal detection
