Range finder for terrain following in Drone Programming - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of a range finder in terrain following?

A range finder measures the distance between the drone and the ground to help maintain a safe and consistent altitude over varying terrain.

beginner

How does a range finder help a drone adjust its altitude automatically?

It sends distance data to the flight controller, which then changes the drone's altitude to keep it at a set height above the ground.

intermediate

Which type of sensor is commonly used as a range finder for terrain following?

Ultrasonic sensors and LiDAR sensors are commonly used because they can accurately measure the distance to the ground.

intermediate

What is a key challenge when using range finders for terrain following?

The sensor must handle different ground surfaces and obstacles without giving false readings, which can cause altitude errors.

advanced

Explain how filtering sensor data improves terrain following.

Filtering smooths out sudden changes or noise in distance readings, helping the drone maintain stable altitude without jerky movements.

What does a range finder measure for terrain following?

A Distance to the ground

B Wind speed

C Battery level

D GPS coordinates

A range finder measures the distance between the drone and the ground to help maintain altitude.

Which sensor type is NOT typically used as a range finder for terrain following?

A Ultrasonic sensor

B Temperature sensor

C LiDAR sensor

D Infrared sensor

Temperature sensors do not measure distance and are not used for terrain following.

Why is filtering sensor data important in terrain following?

A To slow down the drone

B To increase battery consumption

C To reduce noise and sudden spikes in readings

D To change GPS coordinates

Filtering helps smooth out sensor data for stable altitude control.

What happens if a range finder gives false readings due to obstacles?

A The drone will turn off sensors

B The drone will speed up

C The drone will land immediately

D The drone may change altitude incorrectly

False readings can cause the drone to adjust altitude wrongly, risking crashes.

How does the flight controller use range finder data?

A To adjust the drone's altitude

B To change the drone's color

C To send messages to the pilot

D To control the camera angle

The flight controller uses distance data to keep the drone at the correct height.

Describe how a range finder helps a drone follow terrain safely.

Think about how the drone knows how high it is above the ground.

Explain why filtering sensor data is important in terrain following systems.

Consider what happens if sensor data jumps up and down quickly.