Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1993-12-06
1995-08-08
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Magnetometers
327510, G01R 3302
Patent
active
054402328
ABSTRACT:
A portable electromagnetic field exposure dosimeter includes a triaxial fite-loaded coil sensor, a group of amplifiers and bandpass filters, a data control board, and a computer. The triaxial sensor receives electromagnetic radiation along three orthogonal axes for measurement which is channelled through a group of amplifiers and then bandpass filtered into three frequency signal ranges. One frequency range corresponds to exposure at 60 Hz and two of its harmonics. The second frequency range corresponds to high frequency pulsed energy. The third frequency range reflects body motion of a tested individual. The data control board converts such filtered signals into digital code and controls the flow of the converted data to random access memory and to the computer. The computer performs a Fast Fourier Transform on the converted data from the 60 Hz frequency range and then stores or displays the analyzed data as a function of frequency and time. The computer also stores or displays the data from the other two frequency ranges.
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Feaga Adam C.
Lenko Daniel S.
Scarzello John F.
O'Shea Sandra L.
Phillips Roger
Shuster Jacob
The United States of America as represented by the Secretary of
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