07-07-2012, 11:40 AM
best report for best performance. AS the best project report helps to overview the features of the working project
07-07-2012, 11:40 AM
best report for best performance. AS the best project report helps to overview the features of the working project
12-10-2012, 05:16 PM
Obstacle Avoiding Robot
Obstacle Avoiding Robot.ppt (Size: 1.19 MB / Downloads: 155) Mission: To create a robot that will avoid obstacles in its path from point A to point B. The robot works by programming the RCX to send IR (Infrared) messages continuously. Once the robot approaches an obstacle, that object will reflect the IR back to the robot. The light sensor will then see the reflected IR, thus the robot knows when it’s time to turn to avoid hitting the object. Problems Encountered: There was a problem with finding the right amount of time for the robot to turn. Sometimes, it turns too much to the left or to the right. I had to test different values many times before achieving a satisfactory turn. I had difficulties in making the robot run in a straight path. Perhaps one reason is the pivot wheels attached on the rear of the robot. I decided to put these wheels since they are good for making sharp turns, but as I said earlier, they aren’t good for running in straight paths. More Problems Encountered! The two motors used in the robot seem to have different amounts of power in them. The result-- it gradually turns by itself! If you try to adjust the power of the other motor by a very small amount to balance the two, it just gets worse! The light sensor I used isn’t so consistent. The light in the room affects what the sensor sees. If I programmed my robot at night, the light from the sun in the room next morning will have an effect to my previous program. Even More Problems Encountered! I had a problem with programming loops. I spent so much time trying to make the robot turn alternately to the left and to the right. Another difficulty was programming the robot to count the number of turns it has made to make it stop at the end of the “maze”. Another problem with my light sensor is its limited sight. It doesn’t see the obstacles on its side. I also noticed that if the object I used as an obstacle was round (like a flower vase), the sensor don’t see it sometimes. I think the reason is that the IR doesn’t reflect back to the robot because the wave bounces to a different direction due to the round shape of the obstacle. |
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