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hi carl and everyone, what a great forum you have here. do you or anyone know if it is possible to use a metals inductance, as like conductance is used, to discriminate wanted or not wanted targets on a single frequecy motion tr. i know of only one machine and it uses both re, the minelab explorer, if it is possible is it because of patent issues that have stopped other companies from looking down this road? or would it not be as reliable as conductance discriminating on a single frequecy machine? thanks andrew...........
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A patent allows you to protect a method, not a concept, so everyone is free to figure out other methods of determining target inductance. Any method will likely involve more than one frequency.
BTW, old BFO detectors responded to target inductance, at least for small iron targets.
- Carl -
thanks carl, im not to familiar when it comes to patents, as regards bfo's is it possible do you think, to make one with the sensitivity that could match todays ib's or run them close?Comment
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No, I don't think so. I don't know of any frequency-shift design that has ever competed with the depths of PI and VLF.Originally posted by andrew
- CarlComment
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Minelabs claim is a LOAD OF RUBBISH, and nothing special at all!!
All modern discriminatin metal detectors use the inductive and the resistive (I and Q) parts of the target signal to help identify the material.
The two signals are divided into each other, and the ARCTAN of the result is calculated to resolve the PHASE ANGLE of the target material with respect to the transmitted signal.
All Minelab do is display these two values (X or I and Y or Q) on their display. Nothing Whites, Tesoro, Garrett, Fisher don't do internally.
Minelab's bull can be smelt from miless away by those in the know. Goddam it mist be strong stuff, because in the UK we can smell it here, all the way from Autralia ;-).Comment
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Im lovin it !
Hehehe,
Im already lovin this forum ;-PComment
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