Latest Minelab Patent - 11th Feb 2016

[kt315]

Good grief, kt315, you've been here ten years and still don't know what pulse induction is? You've already seen the Impulse voltage and current waveforms posted in this thread. If you want to know the circuit, use the search window, you've already been told the schematic is on this website. http://www.geotech1.com/forums/showt...0572#post80572 See? And here's the patent: http://www.google.com/patents/US4868504 The patent even explains how the thing works, who'd have ever expected that?

Dave, you ONLY operated by term PI but driver is half bridge. great advertizing, Dave! use red color just cause that is Coca-Cola. RED AND WHITE its so liking by teenagers!
use "PI" where there is no PI. patent PI in all your patents even if there is only VLF.
then ALL BBS's ARE SURE PI, IN YOUR LOGIC.

[kt315]

Good grief, kt315, you've been here ten years and still don't know what pulse induction is? You've already seen the Impulse voltage and current waveforms posted in this thread. If you want to know the circuit, use the search window, you've already been told the schematic is on this website. http://www.geotech1.com/forums/showt...0572#post80572 See? And here's the patent: http://www.google.com/patents/US4868504 The patent even explains how the thing works, who'd have ever expected that?

you've been here recently, Dave, but i see you have a potencial. you can order nice book ITMD for learning right now
http://www.amazon.com/Inside-Metal-D...DDMSEQ5SG7TWCJ

[6666]

I still like the Codfisher story

[crane]

The BBS system transmits continuously with no periods during which reactive voltage is zero. Therefore it is not a pulse induction transmitter: it does not and cannot support a pulse induction type receiving system. The BBS system has this in common with the Fisher CZ and White's DFX systems, and it is what none of the aforementioned "VLF" (whether frequency or time domain) systems have in common with any pulse induction system including the GPZ.

BBS and FBS might not be PI but the received signal is processed in the time domain, same as PI (see US5537041 and Bruce Candy's white paper).
It addresses the historical component of the ground signal, same as PI.
This signal decays same as PI and the saline soil signal decays over the same period as PI.
BBS and FBS have a period where X can be extracted relatively free of the target signal, same as PI (during TX).
It also addresses the instantaneous component of the ground magnetic signal or X component or reactive signal, which as you say isn't a problem with most low to medium gain Pi but does cause problems for PI on magnetic soil at the high gains used by ML. There is much more but BBS/FBS is obviously much closer to PI than it is to VLF.

[ivconic]

@ kt315: a sincere Thank you!


........But you'll never know for what.

Dave Johnson

But i know!
You owe him a money now!


See? See how is productive to debate with layman people!
...
People people....
You can debate here for months about not so important and relevant things... i don't understand you at all.
For a change why not debating here a bit more on relevant things?
Whatever the technology is, whatever the name it carry, mother of all questions is; do we, the end users, have any benefits from it?
BBS (reminds me mostly on "Bold Bull Sh.t"), or VRLFS, or SSmSBs... $%"$#BSS or whatever the abbreviation may be; do i as end user have any benefit from it?
Does it brings me up better performances in real life? Does it brings me up more valuable finds on real terrains?
What is use from all that tech crap if i gain almost the same or (in most cases) worse results on real field.. than with some "obsolete" and simple device?
So called "Bulgarian" metal detectors, all simple, all poor IB/s, mostly based on Flind's idea; all beat the crap out on real terrains. How come?
Simple uneducated end user will rather buy such device than some $xx.000 "BBS...FSV....FSB... MSKMRLJMFM.... high tech ultra turbo diesel d2 space atlantis" metal detector!
...
Debating about differences between "PI" and "IB" technology lately is road to nowhere... simply because those two technologies are merging and sublimating through new ideas.
Modern ee's are taking all the good sides from both and trying to merge into one and fresh new concept.
Minelab obviously went further in that area than others.
But until we get clear disclosure by someone from the "inside" of ML... we can only assume about their intentions, ideas and results they achieved.
That's for the results in testing labs. As for the results on the real fields; i am not impressed at all.
...
Let's vote; who is on Dave's side and who is against ?
Does Dave really understand what is the real meaning of "PI" ?

[Teleno]

Let's look at the prior art.
Eric Foster etc cancels log-uniform VRM whereas Minelab cancels saline + log-uniform VRM or log-uniform + log-linear VRM simultaneously, ie, with one setting of the GB.

Excuse me but the concept of "saline" is mentioned casually and only ONCE in the patent:

[0050]....The discrimination method offered by the present invention is insensitive to both resistive and reactive signal components from the soil, which may] also include a component due to a substantially uniform conducting half-space (such as a saline] soil)."

You can write "my invention does this" or whatever your fantasy decides, however, in order to patent it you must DISCLOSE how it's done. This paragraph provides no disclosure, therefore it's a mere DESIDERATA (expression of a wish) with no technical substance to it.

You could GB the ground (log-uniform VRM) with any of Eric's or well known methods but the output of this channel is effectively filtered DC and can't be processed further.

Methods of GB that leave the TC untouched are known long ago, see paragraph 6.5 on page 50 of the following publication:

UXO TARGET DETECTION AND DISCRIMINATION WITH ELECTROMAGNETIC DIFFERENTIAL ILLUMINATION

Therefore the sequence is an obvous combination.

[Dave J.]

you've been here recently, Dave, but i see you have a potencial. you can order nice book ITMD for learning right now
http://www.amazon.com/Inside-Metal-D...DDMSEQ5SG7TWCJ

Since you don't know what PI and "VLF" are, I suggest that YOU buy a copy and read it. Not only do I have my own copy and have read it, the office of the other author Carl Moreland is a 15 second walk from my own. And he knows what PI and "VLF are. If you'd like to know what Minelab regards as PI and "not PI", well, read their patents. So far you are arguing complete nonsense with people who indisputably know their stuff-- and with the patent examiners who approved the patents.

[kt315]

Since you don't know what PI and "VLF" are, I suggest that YOU buy a copy and read it. Not only do I have my own copy and have read it, the office of the other author Carl Moreland is a 15 second walk from my own. And he knows what PI and "VLF are. If you'd like to know what Minelab regards as PI and "not PI", well, read their patents. So far you are arguing complete nonsense with people who indisputably know their stuff-- and with the patent examiners who approved the patents.

ok, i do it. http://www.slideshare.net/seriousdet...st-manual-scan

A BBS detector transmits a complex multi—period sequence of pulses which yields a host of information, about the object and the ground which is not available in any otherdetector.

PULSES -! Dave, agree that BBS is pulse induction in its nature ))))) but yup, you was the pioneer who patented half bridge transmitter like a "PI".

[ivconic]

Since you don't know what PI and "VLF" are, I suggest that YOU buy a copy and read it. Not only do I have my own copy and have read it, the office of the other author Carl Moreland is a 15 second walk from my own. And he knows what PI and "VLF are. If you'd like to know what Minelab regards as PI and "not PI", well, read their patents. So far you are arguing complete nonsense with people who indisputably know their stuff-- and with the patent examiners who approved the patents.

How can you take all this so seriously!?
Oh man.. the other day i stumbled on the field and broke a rib... that's why i can't laugh right now!
But luckily i am having smiles available!!!



P.S.
You just started a spitting war with our famous "expert" on pulse induction technology here!
I suggest to administrators to be ready for incoming avalanche!

[kt315]

angry patent birds

[ivconic]

It is obvious that thieves from ML stole whole concept from early Fisher designs....

[Teleno]

ok, i do it. http://www.slideshare.net/seriousdet...st-manual-scan

A BBS detector transmits a complex multi—period sequence of pulses which yields a host of information, about the object and the ground which is not available in any otherdetector.

PULSES -! Dave, agree that BBS is pulse induction in its nature ))))) but yup, you was the pioneer who patented half bridge transmitter like a "PI".

Is it a goose or a gander? What's the point you're trying to make?

Here, help yourself: Как перестать спорить с людьми в жизни и в интернете — 11 методов

[Dave J.]

It is obvious that thieves from ML stole whole concept from early Fisher designs....

And kt315 just proved it, and at the same time proved that BBS is PI-- see his post right above yours?

But he's wrong: everyone knows that VLF's run off regulated supplies whereas PI's run straight off a lead-acid battery. Has nothing to do with how signals are created or processed or how metals are detected, the "pulse" is what happens when you connect the circuit to the battery without the current limiting you expect from a power supply regulator.

[kt315]

Is it a goose or a gander? What's the point you're trying to make?

Here, help yourself: Как перестать спорить с людьми в жизни и в интернете — 11 методов

still one serb here!

[kt315]

Is it a goose or a gander? What's the point you're trying to make?

Here, help yourself: Как перестать спорить с людьми в жизни и в интернете — 11 методов