Single Chip Optical Encoder Based Velocity Measurement System

Bhatti, P. and Hannaford, B. (1997) Single Chip Optical Encoder Based Velocity Measurement System. IEEE Transactions on Control Systems Technology, 5 (6). pp. 654-61.

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Abstract

A single chip system is designed, implemented, tested and analyzed for the measurement of velocity from incremental optical encoders with quadrature outputs. The system uses a field programmable gate array (FPGA) chip to take advantage of high flexibility and a low cost design cycle. The device uses two counting methods: period counting for low velocities and frequency counting for high velocities to obtain high resolution measurements for a wide range of velocities with a fixed 16bit word length. Verification testing of the device was consistent with the error analysis and showed that quantization errors can be made arbitrarily small by adjusting the trade-off between velocity range and minimum resolution. This trade-off can be adjusted by the designer by simple modifications to the basic design.

Item Type: Article
Subjects: C Surgical Robots > CA Robotic Control
Divisions: Department of Electrical Engineering
Depositing User: Margaret Thompson
Date Deposited: 07 Jul 2015 21:23
Last Modified: 07 Jul 2015 21:23
URI: http://brl.ee.washington.edu/eprints/id/eprint/13

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