PROJECT
Design a car that moves in a straight line using quadrature encoders.
RESEARCH
Our first decision was to decide the basic stuff.Like whether we will use the body of an RC
car bought from market or get a specially designed car base for our project. We chose the
custom built base, the reasons being:
1- More flexibility in as in we could get it built according to our needs.
2- The rc car would have had limited space, and we would have had to adjust the stuff
accordingly, the base, on the other hand can be built according to how much space we need
etc.
3- A good rc car costs marginally less than a custom base.
-Rough design image-
Controller:
PIC18F4520.
Sensors:
We have to work on a car that does not jerks violently towards left/right but it moves in
the straight path and we have to do it without line tracking and for this purpose we are
using Quadrature Encoder as our sensor.
Quadrature Encoder:
Quadrature encoder is a device used for the sensing of position and rotation by the
conversion of displacement into digital pulses.
Quadrature encoder basically consists of a disk that contains coded patterns of opaque and
transparent sectors and is attached to a rotating shaft.
Quadrature encoder basically converts rotations into two pulses let say A and B.The pulses
produced can determine the position .
There are two types of quadrature encoder :
Absolute and Incremental.
The absolute tells us about the position and distance of the wheel while incremental just
measures the distance.
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