Detecting equipment for detecting magnetic minute substance in a

Details Detecting equipment for detecting magnetic minute substance in a Detecting equipment for detecting magnetic minute substance in a

1997-06-23

2000-12-05

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324235, G01N 2782, G01N 2790, G01R 3312, G01R 33035

Patent

active

061571903

ABSTRACT:
The present invention relates to a detecting apparatus for detecting a magnetic minute substance. The detecting apparatus of the present invention can detect continually at a high sensitivity an entity of fine particle, without destroying an object to be inspected. The detecting apparatus comprises a magnetic field generator and a magnetic sensor. The magnetic field generator generates a magnetic field having a right angle to the traveling direction of the object to be inspected. The magnetic sensor includes a SQUID for inspecting a drift of the magnetic field that is parallel to the magnetic field.

REFERENCES:
patent: 3854085 (1974-12-01), Mansson et al.
patent: 3975934 (1976-08-01), Voigt et al.
patent: 4734643 (1988-03-01), Bubenik et al.
patent: 5589772 (1996-12-01), Kugai
patent: 5729135 (1998-03-01), Kugai
Cochran, A. et al., "First-generation SQUID-based nondestructive testing system," IEE Proceedings-A, vol. 140, No. 2, pp. 113-120 (Mar. 1993).
Cochran, A. et al., "SQUIDS for NDT: The Technology and its Capabilities," British Journal of Non-Destructive Testing, vol. 35, No. 4, pp. 173-182 (Apr. 1993).

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