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Land Challenge

Students in Action

Rover

• two-wheel drive
• ultrasonic obstacle avoidance / distance sensor
• motorized cargo bed
• can be remotely controlled or can drive autonomously

Engineering

• assemble rover by attaching DC motors, wheels, electronic motor driver board, servo motors for ultrasonic sensor and cargo bed
• propulsion calibration – speed and steer control
• sonar calibration – ultrasonic sensor measurements and analysis
• how do DC motors work?
• how do servo motors work? what’s the difference?
• assemble a remote controller using the same microprocessor as for the rover

Transportation

• load and unload cargo
• drive from point A to B and back using the remote controller
• let the rover drive autonomously a square pattern
• transport a simulated blood sample from the blood bank to the hospital
• stop automatically in front of the hospital, and
• let the rover automatically unload the cargo

Life Science

• test a simulated blood sample for blood type
• what kind of blood types are there?
• how does the test work?
• why it is important that a patient receives the correct blood type?

Computer Science

• what are the components of the microcontroller you use for rover and remote control?
• write computer code driving the rover
• write computer code reading the sonar and let the rover “think” what to do
• write computer code for the remote control using the micro:bit’s accelerometer
• what are variables?
• change your code for different autonomously driven courses

Geometry and Algebra

• what is a “course”?
• which parameters determine a leg of a course?
• how can you teach the rover to make a 180 degree turn?
• read the graphs you drew for the propulsion calibration tasks and estimate the values of the variables needed for each leg of the desired course
• does your rover do precisely what you think it should do?
• why or why not?

Competition

• free-style slalom race: avoid obstacles using the remote controller
• slalom race: time and accuracy count – stand remote!
• five-leg autonomous course – from start to finish around obstacles in a square pattern
• deliver cargo from the blood bank to the hospital using the remote controller
• three-leg autonomous course – have the rover autonomously deliver the blood to the hospital
• relay race – team race over and under the Golden Gate Bridge