getting maximum depth

[Davent]

gday, another very long,and boring night shift.
Browsing forums,articles about metal detecting tech.
So, found a great article, or interview with Dave Johnson and John Gardiner, 2 engineers from Fishers.
What I found interesting were the questions they answered on getting more depth.

Question 6:
DS: Are we about maxed out as far as how deep VLF units will go? In your opinion, whats the biggest obstacle for current technology in achieving increased useable detection depth?
Dave: "Getting extra depth out of a VLF, multifrequency, or PI machine is very difficult, because these machines follow an inverse 6th power law relationship between signal voltage and depth. If everything else is maintained equal, doubling the depth requires 64 times as much signal. If this is done by increasing transmitter power, doubling depth requires 4,096 times as much battery drain. Thats the basic reason why depth increases come so slowly in this industry.
The biggest impediment to getting usable depth in the ground, is interference from magnetic and electrically conductive minerals in the ground, which can produce signals hundreds of times as strong as that of the metal target youre trying to detect and hopefully identify. There are several approaches to extracting the metal signal from the ground mineral signal, but they all have their limitations. Thats why you see several different technologies coexisting in the market."
John: "Dave points out biggest obstacle which is seeing target through the Ground and Air interference."

 

[Davent]

So from this, what I can only guess, is that with ZVT tech, the depth advantage is gained from the machines ability to filter out the interference from magnetic and electrically conductive minerals in the ground, thus giving a clearer signal from speccies and nuggets that were or are masked to conventional PI and VLF machines.

So, in the future, newer machines are not really likley to punch a whole lot deeper, but should be able to detect smaller targets at greater depth by being able to "see through the clutter,or fog" better.

This pretty new info for me, so sorry if you guys already know this stuff, or if Im reading/understanding it wrong.

 

[silver]

Maybe the next breakthrough will come in the form of advanced battery technology allowing that 4,096 times increase in battery/available power, thus, being able to double the depth window currently available with the clarity through the mineral fog that we see now ,.... it seems to me as plain as day from the above information gleaned from that interview that the increase in depth is there and available within current technologies, but, unavailable due to the battery storage restrictions due to current use battery technology. Once the power source is removed from the detector and made available from an external source and delivered using Tesla technology via localised broadcaste energy, that restriction to depth should be overcome. Just that the new gear will have to be made to handle the increase in power.

 

[Gem in I]

first thing I noticed when I got the zed was going over some large dig holes, getting a signal but then disappearing.
I learnt to put faith in the auto ground balance but I thought how many detectorists (gpx) must have dug that hole for it to be mineralization.
From what I have just read it seems to make some sense to me.

 

[Davent]

Maybe the next breakthrough will come in the form of advanced battery technology allowing that 4,096 times increase in battery/available power, thus, being able to double the depth window currently available with the clarity through the mineral fog that we see now ,.... it seems to me as plain as day from the above information gleaned from that interview that the increase in depth is there and available within current technologies, but, unavailable due to the battery storage restrictions due to current use battery technology. Once the power source is removed from the detector and made available from an external source and delivered using Tesla technology via localised broadcaste energy, that restriction to depth should be overcome. Just that the new gear will have to be made to handle the increase in power.

think you summed it up.
Elon Musk should buy minelab......but then again, I think Im only allowed to dig 1M deep in the NT anyway...Imagine digging 1 meter for a .44 gram bit, then trying to find it in the spoil....

 

[silver]

Another possibility could be to short pulse the higher energy field in bursts that are 4,096 times less frequent, maybe that could be the saving grace for current battery types, still lots of pulses per second, just more intense with rest time between, sort of like how those flashing headlights for pushbikes allow a brighter light for a longer battery life duration. ]

 

[Northeast]

You might want to patent that idea silver...

Would bring a whole new meaning to low and slooooooow.

 

[silver]

You might want to patent that idea silver...

Would bring a whole new meaning to low and slooooooow.

Ok Northeast "patent pending" it is then.

 

[RM Outback]

Great post davent, I'm sure glad you had a boring night shift. I read it as you have.

 

[user 4485]

Pretty much what seperates the SD2000 (& thru GP series) from a GPX or GPZ.
The ability to better handle mineralised ground through improved ground balance + timings. Better electronics play a part to - refined audio etc.

 

[aussiefarmer]

Probably a stupid question but why dont they insulate the top of the coil somehow to reduce interference from emi/atomospear and the operators kit , i know with the sdc if i have zero metal on me with the pick over the shoulder it runs smoother , having a smart phone in my shirt pocket i can run it smooth but i am ground balencing more often and get the odd false sqaurk .

 

[Numb_Thumb]

Pretty much what seperates the SD2000 (& thru GP series) from a GPX or GPZ.
The ability to better handle mineralised ground through improved ground balance + timings. Better electronics play a part to - refined audio etc.

Better than a Z???

Haha....give me some of those drugs your taking mate!

You dont own or use one do you?

 

[user 4485]

I think your on the drugs buddy! You've read my post backwards! An SD2000 doesn't have improved ground balance, timings, electronics or technology (ZVT).
I currently do own & use a GPZ. I've also owned & used various other models from SD to GP to GPX series also.
Get some drugs for dyslexia :lol:

 

[LC76]

Probably a stupid question but why dont they insulate the top of the coil somehow to reduce interference from emi/atomospear and the operators kit .

I probably can't elaborate too much as I used to work for them, but Nugget Finder pretty much do that.
It's one of the reasons they work so well.

 

[silver]

I think your on the drugs buddy! You've read my post backwards! An SD2000 doesn't have improved ground balance, timings, electronics or technology (ZVT).
I currently do own & use a GPZ. I've also owned & used various other models from SD to GP to GPX series also.
Get some drugs for dyslexia :lol:

:Y: :lol: :Y:

 

[travelergold]

Reading this is interesting. May be the next detector out there will be one conected to a generator. Currently the gpz is reasonably heavy, a few more kg's and you will have ample power and punch 100% deeper. May be a power pack that you tow around behind you? Oh in my dreams. TG

 

[silver]

Reading this is interesting. May be the next detector out there will be one conected to a generator. Currently the gpz is reasonably heavy, a few more kg's and you will have ample power and punch 100% deeper. May be a power pack that you tow around behind you? Oh in my dreams. TG

The Tesla backpack ,.... at least the detector won't have batteries inside it, so should be lighter, although, you'd recon the coil would have to be twice as wide for double the depth (but I'm out of my own depth in that statement)
:lol:

 

[Tathradj]

Crikey,
Next thing after that is a Nuke reactor. :lol: :lol: ]
I could just imagine all these detectorist's running around
glowing in the dark. 8) 8)

 

[Davent]

Maybe a suit, like Iron Man. With the chest power thing.

 

[silver]

How deep do you wanna see through the earth Dave ?