公开(公告)号：AU2009356476B2

公开(公告)日：2014-08-07

申请号：AU2009356476

申请日：2009-12-11

Applicant: ABB RESEARCH LTD

Inventor： BOHNERT KLAUS ,  FRANK ANDREAS ,  WUST ROBERT

IPC: G01R15/24 ,  G01R35/00

Abstract: A fiber-optic current sensor comprises a measurinq unit (1) including a light source (3) and a light detector (7) as well as a sensing head (2) including a sensing fiber (11) wound around a conductor (12) and a retarder (10) connected to the sensing fiber (11). The scale factor as a function of current of the fiber-optic current sensor is described by the product of two scaling functions fe' and fs' for the measuring unit (1) and the sensing head (2), respectively. The data describing the scaling functions fe', fs' is stored in a memory (22) of the measuring unit (1), while the data describing the scaling function fs' is also stored in a memory (23) of the sensing head (2). Providing two such memory devices (22, 23) allows to store the scaling functions fe' and fs' separately, thereby turning the control unit as well as the sensor head into easily replaceable modules (1, 2).

公开(公告)号：AU2009356476A1

公开(公告)日：2012-06-21

申请号：AU2009356476

申请日：2009-12-11

Applicant: ABB RESEARCH LTD

Inventor： BOHNERT KLAUS ,  FRANK ANDREAS ,  WUST ROBERT

IPC: G01R15/24 ,  G01R35/00

Abstract: A fiber-optic current sensor comprises a measurinq unit (1) including a light source (3) and a light detector (7) as well as a sensing head (2) including a sensing fiber (11) wound around a conductor (12) and a retarder (10) connected to the sensing fiber (11). The scale factor as a function of current of the fiber-optic current sensor is described by the product of two scaling functions fe' and fs' for the measuring unit (1) and the sensing head (2), respectively. The data describing the scaling functions fe', fs' is stored in a memory (22) of the measuring unit (1), while the data describing the scaling function fs' is also stored in a memory (23) of the sensing head (2). Providing two such memory devices (22, 23) allows to store the scaling functions fe' and fs' separately, thereby turning the control unit as well as the sensor head into easily replaceable modules (1, 2).