Interesting topic, I know it’s old so sorry for raising it from the dead, maybe there’s a newer thread.
I’m wondering why object tracking cannot be done with ultrasonic sensors.
Since Ultrasonic is basically RF, and no different from the way a Radar system would operate.
Since we already know the X,Y position of the radar, the ping reply would give us the Z value, and hence the objects position.
I’m assuming when you send an ultrasonic ping and get a reply, you know the distance of the object, and therefore have a “Z” value.
If the sensor is mounted on a Pan/Tilt system, you therefore have the X & Y values.
So from the first ping alone, you already have the X, Y & Z co-ordinates of the object.
Assuming you did not move the sensor, the second ping would show any change in the objects position, and hence a differential value, that can be used to drive the Pan/Tilt tracking system to follow the object.
Combining this with 2 ultrasonic sensors, on Pan/Tilt systems, surely you can triangulate the object position, right?
