公开(公告)号：US20230304873A1

公开(公告)日：2023-09-28

申请号：US18321592

申请日：2023-05-22

Applicant: PICA Pipeline Inspection and Condition Analysis Corporation

Inventor： David E. Russell ,  Yuwu Yu ,  Ad Shatat ,  Martin Korz

IPC: G01L1/12 ,  G01B7/06

CPC classification number: G01L1/127 ,  G01B7/10

Abstract: A system for detecting and quantifying changes in the stress-strain state of a ferrous structure includes an exciter coil system positioned to generate an AC magnetic field that couples into the ferrous structure. A detector apparatus is positioned relative to the exciter to detect an eddy current magnetic field resulting from the AC magnetic field generated by the exciter coil system. An analyzer compares the eddy current magnetic field parameters detected by the detector apparatus with the direct AC magnetic field transmitted by the exciter coil system and correlates changes in the parameters of the eddy current magnetic field with the stress-strain on the ferrous structure.

公开(公告)号：US20220074893A1

公开(公告)日：2022-03-10

申请号：US17447277

申请日：2021-09-09

Applicant: PICA: Pipeline Inspection and Condition Analysis Corporation

Inventor： David E. Russell ,  Yuwu Yu ,  Ad Shatat ,  Martin Korz

IPC: G01N27/90 ,  G01N33/204

Abstract: A system for detecting and quantifying changes in the stress-strain state of a ferrous structure includes an exciter coil system is positioned to generate an AC magnetic field that couples into the ferrous structure. A detector apparatus is positioned relative to the excited to detect an eddy current magnetic field resulting from the AC magnetic field generated by the exciter coil system. An analyzer compares the eddy current magnetic field parameters detected by the detector apparatus with the direct AC magnetic field transmitted by the exciter coil system and correlates changes in the parameters of the eddy current magnetic field with the stress-strain on the ferrous structure.