Lego Mindstorms Nxt Projects

Saint George
International School of Panama





Computer-Science





Lego Mindstorms NXT Projects




Raúl Chu
Juan Navarro
Jin Fan
Eloy Fong
Josue Zambrano
Dicky Fu
Enrique Hou





12ºHerman Hollerith






Prof. Carlos Acosta






07/11/2011


Index



Introduction…………………….....……………………………..........……………3


Area ofInvestigation………………………………………………….…..............4


Objectives……………………………………………...............………………….5


Justification………………………………………………………………...............6


Definition and Description of Problem………………………………..................7


Data Collection………………………….………………………………............8-11


Hypothesis…………………………………………………………............………12


Argumentation of Hypothesis……………………………….…............………..13Conclusions……………………………………………………….……...........…..14


Recommendation……………………………………..…….……………………..15


Bibliography……………………………………..........…………………………....16


Evaluation Sheet…………………………………………………………………..17









Introduction



In this research project is based on projects with the LEGO MINDSTORMS NXT platform, which will see how the line follower, the labyrinth, the sumobot, and gymnast where we see theirdifferent functions as were performed and their programming.

In this investigate project we will see step by step the different roles that LEGO MINDSTOMRS NXT and its sensors, which allow us to perform functions and develop skills. Our work is complex because not only take care of but also to program design and make our projects work with Lego.Area of Investigation






➢ Computer-Science

Branch of Study: Robotic Invention System.


Area of Interest: Design and programming of LEGO MINDSTORMS NXT.

































Objectives




➢ Designing with LEGO MINDSTORMS NXT line follower, a labyrinth, a sumobot,and a gymnast.




➢ Programmed all.




➢ Performs multiple tests to realize the function you want.

































Justification


We chose this project because it is interesting branch of robotics and systems in terms of functions and designs and gives us new learning skills. We believed that this project encourages us tolearn new technologies and we are interested in learning how we can help in the future.







































Definition and Description of the problem



1. Why the line follower is out of line when it came to follow a curve of 90 degrees?



2. Why the maze robot had trouble settling in to take its course?



3. Whythe sumobot left the black line while having the light sensor?



4. Why the gymnast had trouble to make the turn?

































Data Collection


NXT Line Follower


Line following works by using the Light Sensor to read the changes in reflected light level along the edge of a dark and light surface.   Then the Switch Block directs themotors to vary the speeds depending on the Light Sensor Value.

Tips:

1. Build a front wheel assembly containing both a light sensor and a wheel capable of turning.


2. Make sure the wheel has a good turning radius.


3. Attach the light sensor and wheel to the front of the NXT car. Wire the light sensor to an input and the motors to the outputs.



[pic]

NXT LabyrinthThis robot's mission is to explore all around of the labyrinth.  It tries to "see" walls and other obstacles before running into them, and then turns its head to look left and right to determine which direction looks the best to turn. 

Functions: 


1. Go straight until either the ultrasonic sensor sees something close.



2. Turn the...