Optoelectronic incremental position encoder

Details Optoelectronic incremental position encoder Optoelectronic incremental position encoder

1981-10-05

1984-04-10

Evans, F. L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, H01J 314

Patent

active

044423519

ABSTRACT:
An optoelectronic incremental position encoder mechanically coupled to an accelerator pedal or lever in a battery powered vehicle provides a linear or nonlinear control voltage corresponding to the pedal or lever position. Clear and opaque windows for encoding accelerator position are fabricated on an encoder slide in an in-line arrangement which minimizes decoding errors due to stray light and skewed encoder components. In the preferred embodiment, the binary output from an up/down counter, driven by a position decoder, is converted to analog form and applied to a linear or nonlinear function generator circuit. The nonlinear function generator circuit comprises parallel-coupled amplifier stages, the outputs of which are selectively clamped depending on the amplitude of the input signal from a digital-to-analog converter.

REFERENCES:
patent: 4092571 (1978-05-01), Hopkins et al.
patent: 4218615 (1980-08-01), Zinn, Jr.
patent: 4342910 (1982-08-01), Pfeifer et al.
patent: 4382250 (1983-05-01), Radaelli

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