Novice Question on Robot Sensoring

[TomtheTA]

Hello, first time robot builder here.

I want a robot that can follow a human. Right now I am planning to use an ultrasonic transmitter that will go on the user's belt. Two more transmitters will be on the robot. The robot's transmitters will send a signal to the user. The user will send a signal back giving the distance between them. Using this, I want to calculate the user's distance (obviously), speed, and acceleration. Is this a viable strategy for robot distance sensoring? In my research there seems to be a lot of different approaches, without one being the clearly superior choice.

Thank you.

[Soeren]

hI,

[...] The robot's transmitters will send a signal to the user. The user will send a signal back giving the distance between them.

How do you plan to calculate the distance from that?

Using this, I want to calculate the user's distance (obviously), speed, and acceleration. Is this a viable strategy for robot distance sensoring?

Your first problem is to get reliable distance data, which I can't imagine how you hope to get from the above description and for speed and acceleration, you need more than just the distance between human and robot (and time), as you'd only get relative distance/speed/etc, without an absolute reference.