How robots perceive

Sensors are how a robot gathers information. Each sensor measures one kind of thing and turns it into a number the controller can use. Common ones:

• Distance sensor: how far away an object is
• Light sensor: how bright it is
• Temperature sensor: how hot or cold
• Touch or button: pressed or not

A sensor reading is just data. A distance sensor might report 15, meaning 15 centimetres. The robot's code then decides what that number means and what to do about it.

Practice

For a robot that helps park a car safely, which sensor would you use, and what reading would tell it to stop? Write your answer in one sentence.