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Robotics, robots, NXT and challenges

ELTE-IK 2011/03/08
by

Zoltán Istenes

on 13 September 2011

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Transcript of Robotics, robots, NXT and challenges

What is "Robotics"?
"Robotics is the branch of technology that deals with the design, construction, operation, structural disposition, manufacture and application of robots."
Robotics is related to the sciences of electronics, engineering, mechanics, and software.
What is a "Robot"?
"A robot is a virtual or mechanical artificial agent.
In practice, it is usually an electro-mechanical machine which is guided by computer or electronic programming, and is thus able to do tasks on its own.


Another common characteristic is that by its appearance or movements, a robot often conveys a sense that it has intent or agency of its own."
machine...
program...
do tasks...
looks like...
"of its own"...
"dirty, dull, dangerous..."
Dr. Zoltán Istenes
Eötvös Loránd University
Faculty of Informatics
istenes@inf.elte.hu
LEGO Mindstorms NXT
touch sensor
sound sensor
light intensity sensor
ultrasound distance sensor
processor (48 MHz)
memory (64 + 256 KB)
USB, Bluetooth,
LCD display, battery, buttons
motors (3) with rotation encoder feedback
Arduino microcontroller
"Computer on a chip"
processor (16 MHz),
memory (16 KB),
14 digital I/O,
6 analog I/O,
USB
ZigBee, RC radio control,
infrared distance sensor,
ultrasound distance sensor,
accelerometer (gravity...),
servo motors...
CoroBot
itx computer,
robot arm (4DOF)
webcam,
WiFi,
2x infra red distance sensor
Robots
at ELTE-IK

Surveyor SRV1
500MHz processor
4MB memory
camera (1,3Mpixel)
WiFi
sense
think
act
interaction with the environment
1,6GHz,
2GB RAM, 80GB HDD
Programming the NXT robots
motor control
the programming interface
waiting for sensor value
program structures
sequence of "instructions"
selection (conditional execution)
repetition (loop)
parallel execution
How does the ultrasound sensor works?
speed of the sound: v=340m/s
echo returns in: t=1ms (1/1000 s)
what is the distance (d) of the object?
s=v*t
s= (340m/s) * (1/1000 s) = 340/1000 m = 0.34 m = 34 cm
s=2*d
d=s/2=34/2 cm= 17cm
Challenges
"patrol" in "squares", turn direction if hand clap...
turn around and find if an object is closer than 0,5m then go there...
follow a black line...
Robotics, Robots, Programming
Full transcript