Lesson 21 Quiz

Vision Line Following (Hiwonder 7.6)

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Quiz Questions

1. In vision line following, what is the robot trying to do?

A) Follow a red wide line using the camera B) Follow a face using the camera C) Follow WiFi signals D) Follow GPS coordinates

2. In the Hiwonder 7.6 description, what color is the line the robot follows?

A) Red B) Blue C) Green D) Yellow

3. What is “line offset” in a line-following control loop?

A) The difference between the line position and the image center B) The battery voltage C) The WiFi hotspot name D) The distance to a satellite

4. What does a simple proportional (P) controller do in line following?

A) Turns the robot based on how far the line is from center B) Charges the battery faster C) Makes the line wider D) Turns the WiFi off

5. Why does higher speed make line following harder?

A) The robot has less time to correct steering errors B) Speed has no effect C) The line becomes a different color D) The battery becomes heavier

6. Which environmental change often improves vision line following?

A) Better lighting and less glare B) Adding shiny reflections C) Turning off the camera D) Using a thinner, low-contrast line

7. If the robot loses the line completely, what is a safe default behavior?

A) Stop the motors B) Speed up C) Turn off the website D) Randomly change colors

8. Which track would likely be easiest for the vision module to follow?

A) Wide, high-contrast red line on a simple background B) Thin, low-contrast line on a reflective floor C) A pattern of random colors D) No line at all

9. Explain how a line-following controller uses the detected line position to steer. (Short Answer)

10. List 3 reasons the robot might fail to follow the line and one fix for each. (Short Answer)

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