Interpolation method and shaft angle encoder

Details Interpolation method and shaft angle encoder Interpolation method and shaft angle encoder

1986-08-20

1991-08-20

Shoop, Jr., William M.

Coded data generation or conversion

Digital pattern reading type converter

Optical

341116, H03M 124

Patent

active

050418297

ABSTRACT:
A method of interpolating between two signals comprising the conversion of each signal into digital form and use of the converted signals to address a memory device at each address of which is pre-stored the result of interpolation for a particular combination of values of the signals.
One embodiment of the method resides in a shaft angle encoder having: sensor means regulated by an encoder disc to produce two analogue output signals, analogue to digital conversion means which convert the said analogue signals, a memory device in which the said results are pre-stored and memory addressing means which use the converted signals to cause corresponding pre-stored results to be output from the memory device.

REFERENCES:
patent: 3218632 (1965-11-01), Petersen
patent: 3744050 (1973-07-01), Hedrick
patent: 4079235 (1978-03-01), Froyd et al.
patent: 4421980 (1983-12-01), Kuhne
patent: 4648701 (1987-03-01), Ogihara et al.
Analog-Digital Conversion Notes, published by Analog Devices Inc., p. 64.

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