what are shaft encoders and how optical or inductive sensors are helpful for shaft encoding?

Question

plz help.... its urgent

tomorrow i have to submit an assigment and i hav a dherrea.

if u can plz

Answer 1

Shaft encoders provide information on shaft position or speed (depending on the type of encocder). Optical sensors usually have a light source that shines through a slotted wheel connected to the shaft. As the shaft turns, the light is chopped on and off and it's counted by a photocell. Magnetic (or inductive) sensors use a magnet embedded inthe shaft to move past a pickup coil. As it moves past the coil, it generates a small pulse of EMF which is then used to drive a counter.

HTH

Doug

Answer 2

The inductive sensor is also referred to as Resolver.