NAO Humanoid Robot Tactile Sensors
Besides cameras and microphones, NAO is fitted with capacitive sensors positioned on top of its head in three sections and on its hands.
You can therefore give NAO information through touch: pressing once to tell it shut down, for example, or using the sensors as a series of buttons to trigger an associated action.
The system comes with LED lights that indicate the type of contact. You can also program complex sequences.
NAO is equipped with two sonar channels: two transmitters and two receivers.
They allow NAO to estimate the distances to obstacles in its environment. The detection range is 0–70 cm.
Less than 15 cm, there is no distance information; NAO only knows that an object is present.