IDENTIFICATION OF ULTRASONIC OVERLAPPED SIGNALS BASED ON ATTENUATION MATCHING AND SPARSE DECONVOLUTION
The difficulty of detecting the thickness of steel layer under high attenuation rubber mainly includes the signal-to-noise ratio and axial resolution.The ultrasonic chirp-coded excitation method with attenuation matching can obtain higher signal-to-noise ratio gain at the expense of axial resolution.However,the wider main lobe and the primary echo of rubber steel interface will seriously interfere with the judgment of steel thickness.In order to solve this problem,sparse deconvolution can be used to improve the resolution of echo based on the attenuation matching method.The results show that the signal-to-noise ratio gain brought by the attenuation matching method is conducive to the echo recognition of sparse deconvolution,and the design scheme of wavelet considering attenuation can obtain better deconvolution effect.
Coded excitation Attenuation matching Sparse deconvolution
Qiang WANG Jie MAO Guo-xuan LIAN
State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190, State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,
国际会议
石家庄
英文
489-492
2019-11-01（万方平台首次上网日期，不代表论文的发表时间）