公开(公告)号：US10725073B2

公开(公告)日：2020-07-28

申请号：US15243713

申请日：2016-08-22

Applicant: ABB Power Grids Switzerland AG

Inventor： Xun Gu ,  Sergio Vincenzo Marchese ,  Klaus Bohnert ,  Andreas Frank

IPC: G01R15/24 ,  G01D5/26 ,  G01D5/353

Abstract: An interferometric sensor and related methods are provided, with a sensing element whereby a measurand induces a relative phase shift between two waves, at least one detector measuring an interference signal between the two waves, and further including a phase shift detection unit having as input the interference signal and determining a first measure representative of the principal value of the relative phase shift, and a contrast detection unit having as input the interference signal for determining a second measure representative of the cross-correlation between the two waves, and a further a processing unit for converting the first and second measures to a measurand value.