Introducing to programming LEGO® MINDSTORMS® EV3

Obstacle Detection

Impossible d'accéder à la ressource audio ou vidéo à l'adresse :

La ressource n'est plus disponible ou vous n'êtes pas autorisé à y accéder. Veuillez vérifier votre accès puis recharger le média.

Check Your Understanding:

Instead of thinking about the four-rotation Obstacle Detection as one big movement, the video suggests thinking about it as...

Using a brand new type of Wait Block that allows multiple sensor checking.
Downloading the program into the robot and using built-in options to run parts of the program at certain times.
A long series of tiny movements that add up for four rotations.
All of the above are valid suggestions.

How do repeated decisions allow the robot to watch both sensors at once?

The program resets and restarts at the beginning everytime the readings of any sensor changes.
The robot calculates the path with both sensors at first and runs algorithms for the best way to run the course.
The robot activates a specific sensor at certain times throughout the course.
Every operation is fast, and does not block other commands from running.

In the final version of the program, the robot ends up processing the Switch inside the Loop...

Only once, ever, because it's a Switch.
Four times because the Loop goes for four rotations.
Thousands of times, because the robot processes the loop very quickly and encounters the Switch many times.