公开(公告)号：US11199524B2

公开(公告)日：2021-12-14

申请号：US16432159

申请日：2019-06-05

Applicant: UNIVERSITY OF SOUTH CAROLINA

Inventor： Lingyu Yu ,  Zhaoyun Ma ,  Wenfeng Xiao ,  Zhenhua Tian

IPC: G01N29/06 ,  G01N29/24

Abstract: Network wavefield imaging methods are able to image significantly complex discontinuities or shapes in plate-like structures for superior ultrasonic structural health monitoring (SHM)/nondestructive evaluation (NDE). The imaging provides high-resolution location, shape and/or size images of a structure, and for discontinuities with more complicated profiles. Guided wave (GW) network wavefield imaging methods combine tomography and wavefield/wavenumber imaging algorithms. Metallic plate damage detection uses guided ultrasonic waves and non-contact laser vibrometry. Guided waves are generated by piezoelectric transducers (PZT). A non-contact scanning laser Doppler vibrometer (SLDV) measures the full velocity plate guided wave wavefields. Developed network wavefield imaging algorithms account for multiple-actuator excitations from different angles enclosing the discontinuity, with algorithms using intrinsic wave characteristics such as wavefield, wavenumber, or reconstructed wave energy. Determined locations, sizes and shapes of highlighted areas in wavefield, wavenumber and/or filter reconstructed energy-based images correlate with location, size and shape of damage in metallic plates.

公开(公告)号：US20170219532A1

公开(公告)日：2017-08-03

申请号：US15420341

申请日：2017-01-31

Applicant: University of South Carolina

Inventor： Lingyu Yu ,  Zhenhua Tian

IPC: G01N29/24 ,  G01N29/28 ,  G01N29/12

CPC classification number: G01N29/2418 ,  G01N29/07 ,  G01N29/245 ,  G01N29/262 ,  G01N29/46 ,  G01N2291/011 ,  G01N2291/0231 ,  G01N2291/0425 ,  G01N2291/0427

Abstract: Systems and methods for evaluating an anisotropic composite material are provided. In one example implementation, a system includes a guided wave source configured to provide one or more guided waves to the anisotropic composite material. The system includes at least one sensor configured to measure a property of the one or more guided waves in the anisotropic composite material. The system includes one or more processors configured to receive output signals from the at least one sensor. The one or more processors are configured to construct a phased array of a plurality of output signals associated with different locations on the anisotropic composite material. The one or more processors are configured to generate a directional output beam associated with phased array based at least in part on a direction dependent guided wave parameter.