Current measurement method based on magneto-optic rotation effect
CSTR:
Author:
Affiliation:

College of Electrical and Information Engineering, Northeast Petroleum University, Daqing 163318, China

  • Article
  • | |
  • Metrics
  • |
  • Reference
  • |
  • Related [20]
  • |
  • Cited by
  • | |
  • Comments
    Abstract:

    Aiming at the approximate measurement of magnetic rotation angle in optical current sensor based on light intensity detection mode, this paper proposes a current measurement method based on triangular constant transformation to reconstruct magnetic rotation angle, so as to avoid the large current measurement error caused by the approximate measurement of the magnetic rotation angle. By extracting the direct current (DC) component and the alternating current (AC) component of the light intensity signal detected by the photoelectric detector (PD), the sine signal containing the magnetic rotation angle is directly obtained by dividing the two components, and then the triangular identity transformation method is used to linearly demodulate the magnetic rotation angle and reconstruct the current waveform. The experimental results show that the relative error of current measurement does not exceed 1.40% in the current range of 0.05—0.50 A, which is less than the approximate linear measurement (ALM) method, and the magnetic rotation angle and the current have a good linear relationship.

    Reference
    Cited by
    Comments
    Comments
    分享到微博
    Submit
Get Citation

SHUI Huasheng, RONG Yufei, JIANG Chunlei, DONG Taiji. Current measurement method based on magneto-optic rotation effect[J]. Optoelectronics Letters,2023,19(9):563-569

Copy
Share
Article Metrics
  • Abstract:338
  • PDF: 560
  • HTML: 0
  • Cited by: 0
History
  • Received:February 21,2023
  • Revised:March 19,2023
  • Online: September 20,2023
Article QR Code