Non-destructive testing equipment having SQUID-type sensor in ma

Details Non-destructive testing equipment having SQUID-type sensor in ma Non-destructive testing equipment having SQUID-type sensor in ma

1997-08-08

1999-10-05

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324262, G01N 2790, G01N 2782, G01R 33035, G01R 3312

Patent

active

059630329

ABSTRACT:
A nondestructive testing equipment comprises a magnetic sensor located within a magnetic shield container. The magnetic sensor includes a SQUID that is a magnetic sensor having a very high sensitivity. A magnetically uniform inspection zone is formed in the magnetic shield container. While a rod-like material to be tested passes through the inspection zone at a uniform velocity, the magnetic sensor can detect an appreciable magnetic field variation that is caused by impurities or minor defects contained in the object to be tested.

REFERENCES:
patent: 4734643 (1988-03-01), Bubenik et al.
patent: 5729135 (1998-03-01), Kugai

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