Method and apparatus for detecting and compensating for reverse

Details Method and apparatus for detecting and compensating for reverse Method and apparatus for detecting and compensating for reverse

1991-03-18

1992-09-15

Harvey, Jack B.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Eddy current rotor

324110, 324116, 324142, 25023114, G01R 1117, G01R 1132

Patent

active

051481014

ABSTRACT:
An apparatus and method to detect and avoid inaccuracies in an electronic energy meter due to reverse rotation of the eddy current disk in response to pull-back and creep of the disk, or tampering, including the detection of reverse rotation by checking each three successive states of light transmission between two light emitter/detector pairs in response to an optical castellated disk passing between the emitter/detector pairs, storing pulses generated by the reverse rotation and subtracting the stored pulses upon a subsequent reversal of rotation to the forward direction. Upon reverse rotation in excess of one revolution, the stored pulses are counted along with the counting of the additional reverse rotation pulses and an error signal is generated for subsequent display in response to a command signal.

REFERENCES:
patent: 4034292 (1977-07-01), McClelland, III
patent: 4194184 (1980-03-01), Hartmann et al.
patent: 4321531 (1982-03-01), Marshall
patent: 4489384 (1984-12-01), Hurley et al.
patent: 4665358 (1987-05-01), Bullock et al.
patent: 4774494 (1988-09-01), Extance et al.
patent: 4827123 (1989-05-01), Gray
patent: 5066906 (1991-11-01), Moore

Affiliated with

Also associated with

Rating

Method and apparatus for detecting and compensating for reverse does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting and compensating for reverse , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting and compensating for reverse will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-738781