robot follower human....

hello,

have you an idea how can i do to detect a human with a robot just using ultrasonic sensor? i want to make a robot follower human by only using ultrasonic sensor, i dont care about the precision thank you

A motion detector operates on ultrasonic waves. Just like sonar or radar.

However it does not detect direction. It only detects that something is moving in its field of view.

So you might get results if you were to mount a motion detector on the robot, and sweep it right-left-right-left continually. If it picks up someone moving, you'll know the direction at the moment it triggers an alert.

Then if the person continues moving, the motion detector will continue to trigger alerts, as its field of view sweeps across the person.

On second thought, this will not work. A moving motion detector will think everything is moving.

It will work better if you use an infra-red detector. The operating principle is the same as above, except you probably can move the sensor much more slowly. It depends on its resolution.