Engineering Q&A
What is encoder? Draw and explain an optical encoder operation for rotary motion measurement.
by

1 Answer

0 like 0 dislike

Definition: Digital encoders convert analog motion (rotary or linear) to a digital output form. An optical encoder is an electromechanical device which has an electrical output in digital form proportional to the angular position of the input shaft. Optical encoders enable an angular displacement to be converted directly into a digital form. 

image

Measurement of rotary motion using optical encoder : An optical encoder is an angular position sensor. It has a shaft mechanically coupled to an input driver which rotates a disc rigidly fixed to it. A succession of opaque and transparent segments is marked on the surface of the disc. On one side of the disc are LEDs and on the other side there are photosensitive receivers like photodiodes or photo transistors. When the disc rotates and opaque segments are between LEDs and receivers, no light reaches the receivers and output is zero. When the transparent segments are between LEDs and receivers, light is received by the receivers and output signal is obtained. In this way a train of pulses equivalent to the rotation is obtained as shown.

by

Related questions

1 answer
1 answer
asked Sep 13, 2018 by anonymous1 | 9 views
1 answer
asked Sep 14, 2018 by anonymous1 | 33 views
1 answer
0 answers
asked Feb 22, 2019 by Fredperrey | 129 views
2 answers
Welcome to electronics2electrical.com, where students and teachers can ask and answer any question. Get help and answers to any engineering problem including Electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc. Get answers to questions. Help is always 100% free!

Most popular tags

power motor dc circuit transformer voltage current system used phase resistance factor ac load synchronous induction energy electric generator electrical series frequency capacitor between plant line speed transmission use meter type advantages difference single mosfet control function instrument problem magnetic amplifier high diode bjt machine unit source motors and diagram winding shunt field parallel define electricity torque value maximum time relay types arduino supply digital armature applications thyristor working transformers wave on flow operation three coil material instruments state ratio signal emf effect formula efficiency theorem method disadvantages starting microprocessor network test operating direction controlled different logic transistor single-phase scr loss temperature connected rc law force inductance compare measure station wire low conductor principle wattmeter full characteristics measuring constant measurement breaker losses device converter bridge linear materials nuclear matrix flux drive resistivity of machines angle switch free rectifier protection core circuits battery solar gain thermal loop generators open negative analog number lines friction reactance short gate pole inverter the conservation diesel iron resistors capacitance engineering basic using direct main electronic electronics a steam induced relays hysteresis universal transducer computer feedback range distribution work secondary igbt algebra pmmc plants factors capacitors dielectric controller regulation systems design air fault components rotor cable starter oscillator eddy alternator application semiconductor ammeter rl average forces damping rlc connection zener electromagnetic biasing minimum insulation pressure balanced permanent moving errors running copper self analysis impedance stability quality start ideal curve over commutation is 3-phase arc permeability peak bias error fuzzy commutator conductors superposition density mechanical rotation construction measured electrons charge memory inductive two transfer explain fuse methods off back three-phase tariff locomotive installation welding heating rms surge rating generation potentiometer coupled shaded rate capacity storage adc excitation active pure resistor harmonics reluctance microcontroller voltmeter inductor internal 8085 cro reaction insulating overhead hydro resonance traction definition breakers earth

9,192 questions

7,942 answers

156 comments

3,291 users

9,192 questions
7,942 answers
156 comments
3,291 users