Difference between revisions of "Rotary Position Sensor"
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Revision as of 19:01, 18 May 2020
Rotary position sensors are used to track the rotational position of a shaft. This can be either absolute or relative position.
Contents
Terms
Relative Position
Absolute Position
Multi-turn
Resolution
Accuracy
Repeatability
Potentiometer
Linear
Logarithmic
Encoder
Encoders typically output a digital signal.
Hall-effect
Uses a magnet to detect the rotation of a shaft.
Optical
Similar to Hall-effect encoders, but using optics instead.
Transmissive
Reflective
Analog
Produces a signal similar to a resolver. Also known as a sin-cos encoder.
Capacitive
Inductive
Resolver
Can have multiple poles. Analog signal signal output.
Linear Variable Differential Transformer
Very similar to a resolver where a core moves in a field applied by primary coil. This is then transferred to two output coils where the amplitude of the signal changes based on the core's position.
Linear Variable Inductance Transducer
Operates by measuring the change in inductance as an iron core moves in and out of a coil.
