Electromagnetic noncontacting measuring apparatus

Details Electromagnetic noncontacting measuring apparatus Electromagnetic noncontacting measuring apparatus

1978-12-15

1980-11-18

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

042348447

ABSTRACT:
A noncontacting apparatus and method for following the changes in impedance of a substance located within a specified investigation zone. A bidirectionally focused electromagnetic beam, having a pair of foci, is aimed with one of its foci located adjacent such a zone. A receiver located adjacent the other one of its foci is monitored for electrical changes therein, and such changes are interpreted as indications of impedance changes in the selected zone.

REFERENCES:
patent: 3810005 (1974-05-01), Bennion et al.

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