T2 se target numbers

[hartage]

On the explorer se's two ID numbers the first number denotes iron content and the second number denotes conductivity. On the teknetics t2 se, what do the target id numbers represent, what is it a measurement of ?

 

[Elton]

Simple answer........... an electronic reading interpretation of the target under the coil..

On the T2 it is only a single reading.. an assigned Electronic footprint processor controled ..ie: A dime is set at 83 so when you go over a dime in a perfect scenario it reads 83 as the most likely target.
Keep in mind the Id numbers are typical and can vary for many reasons.....on any target.



[size=large]OBJECT TARGET-ID
foil from gum wrapper 40 - 55
U.S. nickel (5

 

[hartage]

Elton I gather thats what it is, but im looking for more detail such as..... its a measurement of conductivity, or its a measurement of iron content, or its a look up table that is matched to variable x, y, z, or its a measurement of the phase angle between the signal sent vs signal received, or measurement of the frequency shift between the send coil vs the receive coil. Something like that, I would like to be a bit more aware of the physics behind the id numbers. Thanks for the response though, good that members help each other.

 

[Elton]

by Dave J................................

There are a number of ways to process target signals in order to extract target presence and target type information. We call these different ways

 

[hartage]

Elton, Lol wow, you found the info from the MAN himself eh ? (Dave Johnson) well that certainly answered my question in a vague (on purpose) way. I gather from reading the DJ information that it is all of the above. It is signal analysis based on multiple characteristics. Much like trying to listen for an focus on a particular voice in a crowded room while your walking around in the room searching for that particular voice.

Vastly different than the explorer se's approach which I'm guessing is by sending multiple signal frequencies riding on a carrier frequency depending on channel. I think I read somewhere channel 1 on the explorer se is the highest frequency at 14khz and each channel following (2,3,etc) is slightly lower khz than the one before. The 28 signal frequencies (different than the carrier frequency) range up to 100khz the target's affect on each sent signal gives it's characteristics and from those characteristics the targets projected iron content and conductive number values are approximated. Not just "listening" then analyzing but more active, "listening" but when a target is found, pinging it with a range of frequencies and gauging it's characteristics based on how it reacts to each frequency. I imagine this could be why the fbs technique that minelab uses is so good at focusing on round flat objects and lousy at finding irregular shaped objects like cross shaped jewelry. The characteristics of round flat objects are more defined and uniform making it's characteristics easier to spot. I guess this might also be why the explorer will chew through 8AA batteries in 8 hours vs t2 taking 30-40hrs to chew through 4AA batteries. The explorer I bet goes nuts cycling through it's sideband frequencies once a target had been located by the carrier frequency. I also guess that it's why recovery takes so long on the explorers.

Sometimes I wish I were an engineer and could understand this stuff better, all so interesting stuff. As it stands I'm a lay person, a kid (so to speak) peeking through a crack into the amazing world of remote measurement through signal analysis. Interesting heady stuff.

Thanks for the info Elton, definitely piques my interest and makes me feel like a kid in a candy store. And makes me regret that I don't understand this much better than I do.