公开(公告)号：US20220146252A1

公开(公告)日：2022-05-12

申请号：US17436685

申请日：2020-03-26

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Lei Zhang ,  Weng Heng Liew ,  Huajun Liu

IPC: G01B11/16

Abstract: A non-contact non-destructive testing method includes spatially and/or temporally controlling a laser excitation light based on a predetermined pattern. The laser excitation light is projected onto a surface of a test object to generate acoustic waves on the test object. The acoustic waves apply stress loading to the test object. The method also includes imaging the test object with and without stress loading using shearography imaging, and analyzing shearography imaging data to determine a presence of a defect in the test object.

公开(公告)号：US12038270B2

公开(公告)日：2024-07-16

申请号：US17436685

申请日：2020-03-26

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Lei Zhang ,  Weng Heng Liew ,  Huajun Liu

IPC: G01B11/16

CPC classification number: G01B11/162 ,  G01B11/167

Abstract: A non-contact non-destructive testing method includes spatially and/or temporally controlling a laser excitation light based on a predetermined pattern. The laser excitation light is projected onto a surface of a test object to generate acoustic waves on the test object. The acoustic waves apply stress loading to the test object. The method also includes imaging the test object with and without stress loading using shearography imaging, and analyzing shearography imaging data to determine a presence of a defect in the test object.

公开(公告)号：US20220367787A1

公开(公告)日：2022-11-17

申请号：US17623380

申请日：2020-06-30

Applicant: Agency for Science, Technology and Research

Inventor： Huajun Liu ,  Kui Yao

IPC: H01L41/187 ,  H01L41/047 ,  H01L41/316 ,  C01G33/00 ,  C30B29/32 ,  C30B29/30 ,  C30B23/02 ,  C23C14/08

Abstract: Various embodiments may provide an electromechanical responsive film. The electromechanical responsive film may include a composition including sodium (Na), potassium (K), niobium (Nb) and oxygen (O). The composition may have a formula (NaxKy)NbO3-δ, wherein 0≤x

公开(公告)号：US20220128353A1

公开(公告)日：2022-04-28

申请号：US17436128

申请日：2020-03-16

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Huajun Liu ,  Kui Yao ,  Lei Zhang

IPC: G01B17/04 ,  H01L41/08 ,  H01L41/314 ,  H01L41/29 ,  G01N29/04 ,  G01B11/16

Abstract: A structural health monitoring method includes directly forming an acoustic transducer on a surface of a structure to be monitored; generating, by the acoustic transducer, an acoustic wave to apply stress loading to a region of interest on the structure; and detecting a presence of a defect in the region of interest. Detecting includes a non-contact optical imaging of the region of interest with and without the stress loading and an analysis of imaging data from the non-contact optical imaging.