W
Wolfgang Allinger
- Jan 1, 1970
- 0
All was an old nickname for me, but I early quit this, after commingin contact with english peoples
My english isn't perfect, but do I understand, that you'll transmit,
emit, receive ultrasonic with a wire from/to the ambience?
I think, that's nearly impossible. Normally you emit US with some kind
of piezo cristals (with bad efficency), even electromagnic pulsers (EMP)
are possible (with much worser efficency) but I never heard of a wire,
which is able to emitting US easy. Maybe that there is some effect of
magnetostrictive things, but you shurely need lots of mW of power.
If you will use the wire only for transportation of the US, that will
work. US will travel on some kind of resistor-wire (Constantan ?), also
on other metall as steel or copper. But in all these applications, the
US is generated by piezo or EMP and it's not as easy to induce and much
harder to pickup that signal to/from wire. And the greater the diameter
of the material, the better it works. However, you could get reflections
from the end of the wire, which are sometimes not easy to kill/suppress.
A damper for US on wires is not an easy job.
Also having a constant sound speed is not easy, so Constantan mentioned.
I've made uC programms for transmitting US via 90..150m of strait
vertical pulled wire with high pull tension, just to measure the
position of elevator-cabins.
Saludos Wolfgang
