Echo recognition and correction for guided wave radar level based on adaptive LMS  

基于自适应LMS的导波雷达液位计回波识别与校正（英文）

作　　者：MA Wen-gang WANG Xiao-peng TIAN Jun-wei 麻文刚;王小鹏;田俊伟(兰州交通大学电子与信息工程学院,甘肃兰州730070)

机构地区：[1]School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

出　　处：《Journal of Measurement Science and Instrumentation》2017年第4期328-333,共6页测试科学与仪器（英文版）

基　　金：National Natural Science Foundation of China(No.61261029)

摘　　要：The radar echo signal of non-stationary and singular points usually contains false echoes,which affects the recognition and measurement of liquid level echo signal.In order to eliminate false echo interference and improve the recognition and measurement accuracy of the liquid level gauge,a method of echo recognition and correction based on adaptive least mean square(LMS)is proposed.The short-time amplitude function and short-time zero crossing rate function are combined to recognize the echo signal.The weight vector iteration and updating weight coefficients are obtained by LMS method.The echo signal is recognized and the false echo interference is suppressed.The experimental results show that the level echo signal can be accurately recognized by this method,and level measurement accuracy can reach0.47%F.S.Compared with other denoising methods,adaptive LMS can keep the signal singularity characteristics while suppressing the noise.Moreover,it has better robustness.

关 键 词：guided wave radar liquid level gauge least mean square (LMS) echo correction 

分 类 号：TH816[机械工程—仪器科学与技术]