Revolution counter using a magnetic bubble device for multi-turn

Details Revolution counter using a magnetic bubble device for multi-turn Revolution counter using a magnetic bubble device for multi-turn

1989-09-21

1991-02-05

Shoop, Jr., William M.

Coded data generation or conversion

Digital pattern reading type converter

Magnetic, inductive or capacitive

341 13, 25023114, 25023117, 25023118, 25023113, H03M 122

Patent

active

049909096

ABSTRACT:
A multi-turn absolute encoder comprising a shaft angle encoder for measuring the turning angle of a rotating shaft, and a turn detector for detecting the number of turns of the rotating shaft, wherein the turn detector uses a magnetic bubble element for sequentially transferring magnetic bubbles in a pattern in accordance with a magnetic field generated by a permanent magnet turned by the shaft, and a detector to detect the number of turns of the shaft from the positions of the magnetic bubbles which are transferred in the pattern.

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patent: 4791366 (1988-12-01), Suzuki et al.
patent: 4855734 (1989-08-01), Elsdoerfer

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