High Accuracy Optical Shaft Encoder System.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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An optical shaft encoder system for measuring electrically powered motor shaft speed, including a system for increasing the sinosoidal encoder output waveforms by a multiplication factor, converting the product of the multiplied waveforms to square waves, comparing the waveforms to a reference waveform and generating a correction signal which is fed back to the motor through servo circuitry, thereby correcting errors in motor shaft rotational speed. Author
- Electrical and Electronic Equipment
- Manufacturing and Industrial Engineering and Control of Production Systems
- Optical Detection and Detectors