Title:
CURRENT SENSOR, AND MEASURING DEVICE AND MEASURING METHOD EMPLOYING SAME
Document Type and Number:
WIPO Patent Application WO/2017/115623
Kind Code:
A1
Abstract:
The objective of the present invention is to provide an optical type current sensor having a sensor sensitivity that can be regulated, and a measuring device employing the same. The present invention provides a current sensor 40 which causes a magnetic core 44 to act on a current line to be measured, and detects a current on the basis of a magnetic field distribution, characterized in that the current sensor 40 is provided with: a magnetic flux density changing means for changing the magnetic flux density along a magnetic path resulting from the magnetic core 44; and an optical type current detecting means in which a magneto-optical element 41 is inserted into the magnetic core, and the current is detected on the basis of the polarization angle of light acting on the magneto-optical element.
Inventors:
ENDOU HISASHI (JP)
Application Number:
PCT/JP2016/086290
Publication Date:
July 06, 2017
Filing Date:
December 07, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01R15/24
Foreign References:
JPH07218552A | 1995-08-18 | |||
JPH07198757A | 1995-08-01 | |||
JPH06130089A | 1994-05-13 | |||
JPH11281722A | 1999-10-15 | |||
JP2014106101A | 2014-06-09 | |||
JP2001124802A | 2001-05-11 | |||
JP2014010012A | 2014-01-20 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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