Wired.RoboticCar
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Transcript of Wired.RoboticCar
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WIRED ROBOTIC CAR
Primary Step in the Field of Robotics…
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Objective
10/23/20102
To design a manually controlled car capable of crossinga track flooded with various hurdles in minimum
possible time.
This basically requires:• A good design• A good control
• Team co-ordination
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Wired Robotic Car
10/23/20104
A simple assembly of various components like
For Bot:
Motors Wheel Set Grip
For Remote: DPDT Switches
Circuit Board
AC to DC Converter
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General Constraints
10/23/20106
Every Robotic Hurdle Race involves various constraintslike:
Size Constraint(Generally 30x 30x 30cm or 25x 25x 25cm)
Voltage Constraint(Generally 24 V DC)
Power Constraint
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Power Source
(AC to DC Conversion)
10/23/20107
We are already familiar with the concept of AC & DC supply andconversion of AC into DC.Various methods used for this purpose are:
Rectifier Transformer – step down transformer Diode & Capacitor – to convert a.c to d.c
Battery – for onboard operations of car
Adapter – should be minimum of 12v and 500mA
Laptop Charger
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Transformer
Transformer
CenterTapping
MultiTapping
AutoTransformer
Advantages:• Easily Available• Cheap
Disadvantages:
• Current Weakens Due to Heating Effect• Bulky
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Transformer » Rectifier
T r an s f or m er
Input
Input
Output
Output
12
12
0
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Specifications
Transformer » Rectifier
– 12-0-12 (Center Tapping)
– 5 Ampere– Diode: 5608
– Capacitor: 4700 µF, 36 V
Laptop Charger
– 18.5 – 19.5 V– 3.5 Ampere
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Remote Design
DPDT Connections(Double Pole Double Throw)
+ - + - + -
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PCB Circuits
(Printed Circuit Board)
+ - + -
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Motors
Motors
AC Motor DC Motor
Toy Motor Geared Motor
Internal Geared
External Geared
Self Locking, High Torque
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Specifications
Voltage Rating
Current RatingRPM
Weight
Shaft Dimension
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General Basics
Linear Speed = RPM x Radius
RPM x Torque≡
Power≡
V x I
Control Vs. Speed
Gear Ratio
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Wheels
Wheels
Robotic WheelBicycle Supporting
Wheel
Cheap
Easily Available
Robust
Expensive
Weak
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Specification
how to select wheel
External Diameter
Internal Diameter– Bush
Thickness
– Doubling
Material & Surface
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Wheel Surface
(Track Belts & Grips)
Floor Mat
Cricket Bat Grip
Tyre Tube
Front to Rear Belt
– Tank type track belt
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Assembly of Components
Using Internal Geared Motor
Using External Geared Motor
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Simplest Car
Material Used:
– 4 x 100 rpm Motors (Robokit, Vega)
– 8 Wheels (Diameter = 6 cm)
– Floor Mat as Track Belt
– Iron Chassis
– DPDT Remote Control– Laptop Charger as Power Source
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Chassis
Step 1: Take an iron strip of around 1 mm thickness
14 cm
16 cm
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Chassis
Step 3: Bend the strip perpendicularly at a distance of 4cm from left & right edge
Step 4: Screw up motors & other accessories.
Top View Bottom View
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Slight Change
Step 1: Take an iron strip of around 1 mm thickness
18cm
4cm
Step 2: Drill the strip as shown 2cm
2cm
13mm
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Step 3: Mark lines on the strip as shown. 2cm
2cm
13mm4cm
1.5cm
1.5cm
1cm
Repeat Step 1-3 to make a similar strip.
Step 4: Take two another strips of shown dimensions
4cm
10cm
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Step 5: Place the two strips made in Step1-3 in the vertical plane and weld themtogether with the help of strips made in step 4.
4cm
10cm
18cm
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Most Successful Design
Material Used:
– 4 x 100 rpm Motors (External geared)
– 4 Wheels (Diameter = 10 cm)
– Floor Mat as Track Belt
– Iron Chassis
– DPDT Remote Control– Transformer as Power Source
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Milind Singal: 9873243053Ajay Verma: 9911982505Mohit Gupta: 9466643004