Infrared sensors are another method to find obstacles and the distance from the robot. The principle of infrared distance sensors is based on the infrared light that is reflected from a surface when hitting an obstacle. An IR receiver will capture the reflected light and the voltage is measured based on the amount of light received.
One of the popular IR range sensors is Sharp GP2D12, the product link is as follows:
The following figure shows the Sharp GP2D12 sensor:
The sensor sends out a beam of IR light and uses triangulation to measure the ...