Position transducer

Details Position transducer Position transducer

1991-03-15

1993-08-03

Yusko, Donald J.

Coded data generation or conversion

Code generator or transmitter

Numerical pulse type

34087028, 34087029, G08C 1912

Patent

active

052333558

ABSTRACT:
An absolute position transducer (encoder) comprising an incremental encoder having a coded disk connected stably to a shaft, and connected to a sensor for emitting a signal for each complete turn of the disk The incremental encoder produces a first and second signal, each consisting of a sequence of pulses in which each pulse equals one elementary angular increment of the shaft, and a third signal (ZERO) consisting of a sequence of zero pulses, each emitted for each complete turn of the shaft. The absolute encoder comprises a resettable counter for counting the signal emitted by the sensor and memorizing the number of turns of the shaft in a permanent memory; and a control circuit enabled by a zero pulse generated by the incremental encoder, and cooperating with a coding circuit for emitting a coded dummy zero pulse in such a manner that, in the interval between the zero and dummy zero pulses, the first or second signal supplies a decoding circuit with a number of pulses equal to the number stored in the memory of the count circuit.

REFERENCES:
patent: 4014015 (1977-03-01), Gundlach
patent: 4305072 (1981-12-01), Makita
patent: 4587485 (1986-05-01), Papiernik
patent: 4608714 (1986-08-01), Juengel
patent: 4748447 (1988-05-01), Oshizawa
patent: 4855734 (1989-08-01), Elsdoerfer
patent: 4942394 (1990-07-01), Gasiunas
Radio Shack "Understanding Data Communications" 1984 pp. 2-18 through 2-19.

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