基于水下仪器的噪声去除方法研究  

Research on Noise Removal Method Based on Underwater Instruments

作　　者：庞云飞 任勇峰[1] 赵逢锦 PANG Yunfei;REN Yongfeng;ZHAO Fengjin(National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051)

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051

出　　处：《舰船电子工程》2025年第1期177-181,共5页Ship Electronic Engineering

摘　　要：噪声抑制是提高水下目标检测能力的重要问题。为了减小水下测试中仪器的开关噪声对测量信号的影响,采用滤波方法对开关噪声进行滤除。文章分析了水下仪器接入测试系统时信号通道纹波急剧增大的原因,通过理论分析与实验仿真对低频信号进行滤波处理,将仿中值滤波法与滑窗法相结合,对低频信号进行调制。试验结果表明:纹波得到有效抑制,仪器开关噪声对测试低频信号的干扰明显减少,且输出与真实数据接近,误差仅有5.3×10^(-4),处理后的数据在时间轴上产生的偏移仅有200μs,高度还原了真实数据,极大地提高了测试的准确性。Noise suppression is an important problem to improve the detection ability of underwater targets.In order to reduce the influence of the switching noise of the instrument on the measurement signal in the underwater test,the switching noise is fil⁃tered out by filtering.The article analyzes the reasons for the sharp increase of the signal channel ripple when the underwater instru⁃ment is connected to the test system.Through theoretical analysis and experimental simulation,the low-frequency signal is filtered,and the imitation median filter method and the sliding window method are combined to modulate the low-frequency signal.The test results show that the ripple is effectively suppressed,the interference of the instrument switch noise to the test low-frequency signal is significantly reduced,and the output is close to the real data,with an error of only 5.3×10^(-4),and the offset of the processed data on the timeline is only 200μs,which highly restores the real data and greatly improves the accuracy of the test.

关 键 词：中值滤波 图像去噪 开关噪声 纹波 

分 类 号：TN713[电子电信—电路与系统]