Sensors. Bryson Cook James Wyler Hao Phan. Bryson Cook. Outline. Optical Encoders: Theory and applications –Types of encoders –Fundamental Components –Quadrature –Errors –Applications
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Incremental Encoder code Disk
Absolute Encoder code Disk
*Note: Extremely simplified encoder
Notice only 1 bit has to be changed for all transitions.
Gives velocity and position but not direction
Quadrature Encoder Track
Gives velocity, position AND direction
2 Bit Wheel 64 Bit Wheel
Assembly Error – Disk not positioned correctly with respect to sensor
Manufacturing Error – Tolerances of sensor positioning and code printing lead to inaccurate signals
James WylerOptical Encoder Errors
the primary voltage.
indicates the direction of