Gradiometer apparatus with compensation coils for measuring magn

Details Gradiometer apparatus with compensation coils for measuring magn Gradiometer apparatus with compensation coils for measuring magn

1990-01-22

1992-05-12

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

324225, 324248, G01R 33022, G01R 33025, G01R 33035

Patent

active

051131366

ABSTRACT:
An apparatus is provided for measuring a very weak magnetic field generated by a human body, etc. External magnetic noise components coming from other magnetic sources and existing around an object whose magnetic field is to be measured are detected by compensation coils of the apparatus. The compensation coils are oriented in multiple dimensional directions. The detected noise components are weighted and added to each other to correctly find the noise components. Thereafter, the noise components mixed in the objective very weak magnetic field are removed, thereby correctly measuring the very weak magnetic field.

REFERENCES:
patent: 3956690 (1976-05-01), Rorden
patent: 3965411 (1976-06-01), Hesterman
patent: 3976938 (1976-08-01), Hesterman

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