Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition.Lamb waves have multimodal and dispersion effects, which reduces their performance in damage localization with respect to resolution.  To detect damage with fewest sensors and high resolution, a method, using only two piezoelectric transducers and based on orthogonal matching pursuit (OMP) decomposition, was proposed.  First, an OMP-based decomposition and dispersion removal algorithm is introduced, which is capable of separating wave packets of different propagation paths and removing the dispersion part successively.  The experimental results show that the OMP-based algorithm is beneficial for resolution improvement and transducer usage reduction.
OMP
Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition.Lamb waves have multimodal and dispersion effects, which reduces their performance in damage localization with respect to resolution.  To detect damage with fewest sensors and high resolution, a method, using only two piezoelectric transducers and based on orthogonal matching pursuit (OMP) decomposition, was proposed.  First, an OMP-based decomposition and dispersion removal algorithm is introduced, which is capable of separating wave packets of different propagation paths and removing the dispersion part successively.  The experimental results show that the OMP-based algorithm is beneficial for resolution improvement and transducer usage reduction.
OMP
Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition.Lamb waves have multimodal and dispersion effects, which reduces their performance in damage localization with respect to resolution.  To detect damage with fewest sensors and high resolution, a method, using only two piezoelectric transducers and based on orthogonal matching pursuit (OMP) decomposition, was proposed.  First, an OMP-based decomposition and dispersion removal algorithm is introduced, which is capable of separating wave packets of different propagation paths and removing the dispersion part successively.  The experimental results show that the OMP-based algorithm is beneficial for resolution improvement and transducer usage reduction.
OMP