Coil signal strength question

[wyndham]

I realize this is a very simple question to those here but it might help me understand the RX part of the coil signal.
Is it the responding Eddy current from the target thru each turn of the coil, where each intersecting point generates a small signal that accumulates to make the full RX signal? Put another way if a coil had 6 turns then the eddy current would only have 6 points to induce a signal, where a 30 turn coil has more lines to intersect and induce more signal.
If this is so then does any of the loops null out when it collides with the signal from another loop or does this signal look like a train where each car is a(analog version of data packet) unique signal waiting to arive at the PI board or do they add up to one signal.
Or is this totally the wrong way of understanding the RX signal to the PI board.
Thanks Wyndham

[Max]

I realize this is a very simple question to those here but it might help me understand the RX part of the coil signal.
Is it the responding Eddy current from the target thru each turn of the coil, where each intersecting point generates a small signal that accumulates to make the full RX signal? Put another way if a coil had 6 turns then the eddy current would only have 6 points to induce a signal, where a 30 turn coil has more lines to intersect and induce more signal.
If this is so then does any of the loops null out when it collides with the signal from another loop or does this signal look like a train where each car is a(analog version of data packet) unique signal waiting to arive at the PI board or do they add up to one signal.
Or is this totally the wrong way of understanding the RX signal to the PI board.
Thanks Wyndham

Hi,
each more turn give its voltage to be sum with others...so one could think that increasing the number of turns would give an advantage...well you get more voltage but at the end you have more inductance....resistance...capacitance... weight...and then...not so good.
Expecially inductance/capacitance are big problems if you have to watch at say 10us after switchoff...cause you need a fast recovery...and energy storage and rings are to be avoided in good PI (for small target detection you need small delays).

Best regards,
Max

[wyndham]

Thanks Max, I kinda thought that was the way it worked. thanks again Wyndham