I am using the
SRF05 sensor to detect distance, so far so good. Now we need to detect only changes, which means, the sensor will have some close object to it, but than when some other object which is more far, is moving, I will have to detect that.
My concern was that if I get a distance from a close obstacle, a movement of other far obstacles will not affect him because I don't get linear signal, but just the distance of the close object that reflects the sound signal.
I am little bit confused, because the signals are going around the room, and when it gives you a distance, it's a mix of many reflections from objects around. So how a far object will affect it, if I have a more close object?
Am I completely wrong?