Arrangement for reading an absolute position encoder for determi

Details Arrangement for reading an absolute position encoder for determi Arrangement for reading an absolute position encoder for determi

1990-04-30

1991-07-30

Black, Thomas G.

Boots, shoes, and leggings

36442601, 303 20, B60T 1366, B06F 1520

Patent

active

050364685

ABSTRACT:
An apparatus for reading the binary value of a digital absolute position encoder for obtaining an operating position of a brake handle for a railway vehicle including a storage circuit for storing a binary value of an initial offset release position of the encoder. A memory circuit for retaining a binary value of a maximum resolution of the encoder. A first summing circuit for substracting the binary value of the initial offset release position from the binary value of the operating position for obtaining a resultant binary value which is passed to an output summing circuit by an activated enable circuit when the binary value of the operating position is greater than the binary value of the initial offset release position. A second summing circuit for subtracting the binary value of the operating position from the binary value of the maximum resolution for obtaining a difference in binary value which is added tothe binary value of the initial offset release position, a third summing circuit for obtaining a resultant binary value which is passed to the output summing circuit by an activated enable circuit when the binary value of the initial offset release position is greater than the binary value of the operating position.

REFERENCES:
patent: 4206620 (1980-06-01), Eaton
patent: 4260941 (1981-04-01), Engelberger et al.
patent: 4344138 (1982-08-01), Frasier
patent: 4488237 (1984-12-01), Aronson et al.
patent: 4578754 (1986-03-01), Sahasrabudhe et al.
patent: 4631657 (1986-12-01), Hill et al.
patent: 4692867 (1987-09-01), Poole

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