Title:
DEVICE FOR ELIMINATING MAGNETIC NOISE USING SQUID
Document Type and Number:
Japanese Patent JPH04357481
Kind Code:
A
Abstract:
PURPOSE: To enable a noise-elimination space which can cancel an environmental magnetic noise which obstructs a living organism magnetic measurement, etc., with a high magnetic damping factor particularly at a low-frequency area to be formed.
CONSTITUTION: A title item consists of a SQUID flux meter 1 and a pair of noise-cancellation coils 2 as a minimum unit and a feedback current I which is output from the SQUID flux meter 1 is supplied to the noise-cancellation coils 2. A flux detection coil 3 of the squid flux meter 1 is placed at a specific space portion such as a center space portion 4 of the noise cancellation coils 2, thus enabling the specific space portion to be used as a magnetic noise- elimination space.
Inventors:
MATSUMOTO KAZUTAKE
OKESAWA ATSUSHI
FUJIOKA KOJI
OKESAWA ATSUSHI
FUJIOKA KOJI
Application Number:
JP13717591A
Publication Date:
December 10, 1992
Filing Date:
May 13, 1991
Export Citation:
Assignee:
HOXAN KK
International Classes:
A61B5/05; G01R33/025; G01R33/035; G01R33/20; G01R33/24; G01R33/28; G01R33/32; G01R33/421; G05F7/00; H01L39/22; (IPC1-7): A61B5/05; G01R33/025; G01R33/035; G01R33/24; G01R33/28; G01R33/42; G05F7/00
Domestic Patent References:
| JPS5925726A | 1984-02-09 |
Attorney, Agent or Firm:
Yoshio Saito