Title:
DISTRIBUTED DEMAGNETIZING COIL SYSTEM, SHIELDING DEVICE, AND DEMAGNETIZING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/128117
Kind Code:
A1
Abstract:
A distributed demagnetizing coil system, a shielding device, and a demagnetizing method. The system comprises a plurality of turns of demagnetizing coils (2, 4) and a plurality of connecting wires (6, 7). The plurality of turns of demagnetizing coils (2, 4) are evenly wound on each shielding surface of a shielding body (1) in the shielding device at intervals. One half of each turn of demagnetizing coil (2, 4) is located on the inner side of the wound shielding body (1) and the other half of each turn of demagnetizing coil is located on the outer side of the wound shielding body (1) for providing corresponding demagnetizing magnetic fields to form a closed magnetic flux loop. The connecting wires (6, 7) are provided on the outer side of the shielding surface (1) in an inflection manner, one half of each connecting wire (6, 7) is connected to the corresponding demagnetizing coils (2, 4), and the other half of each connecting wire is reversely inflected along an original path and is connected to a power supply module, so that a corresponding demagnetizing current is introduced into each demagnetizing coil (2, 4) connected to the connecting wire. Compared with the prior art, the demagnetizing coils (2, 4) provided in a distributed manner are used, a demagnetization effect can be greatly improved, a static magnetic field in the shielding device is reduced to the extremely low degree, and an urgent requirement for a non-magnetic environment during weak magnetic field signal detection is effectively satisfied.
Inventors:
SUN ZHIYIN (CN)
LI LIYI (CN)
PAN DONGHUA (CN)
SONG KAI (CN)
LIU YUXI (CN)
TAN LIGUO (CN)
ZHAO YIYANG (CN)
LI LIYI (CN)
PAN DONGHUA (CN)
SONG KAI (CN)
LIU YUXI (CN)
TAN LIGUO (CN)
ZHAO YIYANG (CN)
Application Number:
PCT/CN2019/128524
Publication Date:
July 01, 2021
Filing Date:
December 26, 2019
Export Citation:
Assignee:
HARBIN INST TECHNOLOGY (CN)
International Classes:
H01F13/00
Foreign References:
| CN103477285A | 2013-12-25 | |||
| CN1868108A | 2006-11-22 | |||
| CN105074487A | 2015-11-18 | |||
| JPH05218677A | 1993-08-27 | |||
| US20110237442A1 | 2011-09-29 |
Attorney, Agent or Firm:
BEIJING GEYUN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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