Apparatus for detecting rotation of a rotary element such as the

Details Apparatus for detecting rotation of a rotary element such as the Apparatus for detecting rotation of a rotary element such as the

1991-07-17

1993-02-23

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using rotating member with particular electrical output or...

324166, 364550, 364565, G01F 110

Patent

active

051879891

ABSTRACT:
The rotation detecting device comprises m proximity detectors for detecting the passage of a mark fixed to a rotary element. Changes in the signals delivered by each of the detectors in a selected series of m-1 detectors are analyzed. Once a mark is detected at one of the sectors situated at an end of the series, a revolution counting index is incremented, a new series of m-1 detectors is selected excluding the detector which has just detected the passage of the mark, and criteria representative of changes in the signals are reinitialized for the forthcoming signals from the newly-selected series. An adaptive system is thus obtained applicable to detecting the rotation of a spinner in a water meter.

REFERENCES:
patent: 4399709 (1983-08-01), Diepold-Scharnitzky
patent: 4537081 (1985-08-01), Max
patent: 4565090 (1986-01-01), Gotanda
vol. 7, No. 274 "Patent Abstracts" of Japan.

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