公开(公告)号：US11448610B2

公开(公告)日：2022-09-20

申请号：US17626658

申请日：2020-07-10

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Alberto A. Sagues ,  Hani Freij ,  David Adam Dukeman ,  Christopher Lewis Alexander

IPC: G01N27/82 ,  G01N27/20 ,  G01N33/38 ,  G01N27/9013 ,  G01N27/90 ,  E04C5/10 ,  G01R33/12 ,  G01R33/10 ,  G01R33/028

Abstract: An exemplary method of indicating a condition of grout within a post-tensioned tendon involves positioning a magnet and a metallic sensing plate in close proximity to an outer surface of the post-tensioned tendon; rotating the magnet and the metallic sensing plate around the outer surface of the post-tensioned tendon; measuring an amount of magnetic forces applied to the magnet during rotation of the magnet around the post-tensioned tendon; measuring an impedance between the metallic sensing plate and metallic strands within the post-tensioned tendon during rotation of the metallic sensing plate around the post-tensioned tendon; and generating an image of a cross-section of the post-tensioned tendon indicating one or more grout conditions in spatial proximity to the metallic strands within the post-tensioned tendon based on measurement data using the magnet and the metallic sensing plate.

公开(公告)号：US11692959B2

公开(公告)日：2023-07-04

申请号：US17884904

申请日：2022-08-10

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Alberto A. Sagues ,  Hani Freij ,  David Adam Dukeman ,  Christopher Lewis Alexander

IPC: G01N27/82 ,  G01N27/20 ,  G01N27/90 ,  G01N27/9013 ,  G01N33/38 ,  E04C5/10 ,  G01R33/028 ,  G01R33/10 ,  G01R33/12

CPC classification number: G01N27/20 ,  G01N27/82 ,  G01N27/902 ,  G01N27/9006 ,  G01N27/9046 ,  G01N33/383 ,  E04C5/10 ,  G01R33/028 ,  G01R33/10 ,  G01R33/12

Abstract: An exemplary method of indicating a condition of grout within a post-tensioned tendon involves positioning a magnet and a metallic sensing plate in close proximity to an outer surface of the post-tensioned tendon; rotating the magnet and the metallic sensing plate around the outer surface of the post-tensioned tendon; measuring an amount of magnetic forces applied to the magnet during rotation of the magnet around the post-tensioned tendon; measuring an impedance between the metallic sensing plate and metallic strands within the post-tensioned tendon during rotation of the metallic sensing plate around the post-tensioned tendon; and generating an image of a cross-section of the post-tensioned tendon indicating one or more grout conditions in spatial proximity to the metallic strands within the post-tensioned tendon based on measurement data using the magnet and the metallic sensing plate.