Meter rotor rotation optical sensor

Details Meter rotor rotation optical sensor Meter rotor rotation optical sensor

G - Physics

08

C

340/136.2

G08C 21/00 (2006.01) G01R 11/02 (2006.01) G01R 11/16 (2006.01) G08C 23/06 (2006.01)

Patent

CA 1139395

-16- PATENT APPLICATION ON METER ROTOR ROTATION OPTICAL SENSOR BY ROBERT J. HOSS ABSTRACT OF THE DISCLOSURE Electrical consumption registered in a watthour meter is converted into an electrical analog suitable for trans- mission to a remote monitoring site by reflecting light off the watthour meter rotor, the light being periodically interrupted during each rotor rotation by a darkened light absorbing area of the rotor which traverses the light beam, passing the light to and from the meter through fiber optic cables and digitally counting at a distant location each of the pulses corresponding to the rotor rotation which are transduced from the light re- flections. By generating the light from an AC signal, AC signal processing techniques employed in the light reflection detection circuitry ensure a useable electrical analog with minimal likelihood of error otherwise arising from spurious noise and varying ambient temperature related signals.

334590

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