field test unit no 001 "model T"

[moodz]

....LOL .. the purpose of that exercise is to show that a fixed damping resistor is only an approximation and not an ideal load for absorbing the flyback energy "efficiently" since there is "real" power and "reactive" power.

moodz

[chudster]

PS... where are you searching for patent filings .... there are two more since the one you mention.

That was just a quick web search. If I was a patent troll I would have searched more exhaustively

Your advice is good and you should keep your options open.

Personally, I take the view that it is up to you. It costs money and time to come up with new ideas and patents are a way to recoup that. Its your right to file patent and your decision when to share and if it progresses you will have to tell the world how it works anyway.

Just itching though to see new ideas and going crazy waiting

Chudster

[moodz]

Announcement.

I am happy to announce that agreement has been reached to deliver a new technology PI detector based on recent developments and technical advances in this field. The detector will be designated as the QED-PRO. It will utilize the high performance QED platform as a base with a new frontend based on cutting edge discoveries surpassing all known prior art.


You will be able to see what all the fuss is about ( or not ) in the not too distant future. In the mean time I will plug away at sharing as I much as I can when I can.

[hdphilip]

Thanks Moodz,

Maybe this is the year of major progress in home made metal detectors...

I'm still hard at work on mine... But with some major help...

Philip


i wonder if it will be open sourced?

[moodz]

Thanks Moodz,

Maybe this is the year of major progress in home made metal detectors...

I'm still hard at work on mine... But with some major help...

Philip


i wonder if it will be open sourced?

I think you are right Philip .. this will be a year for major progress in home made detectors and open source should come into it ... I have got some VLF bits and ideas ready to go when I can get away from this PI business as well

moodz.

[hdphilip]

I have got some VLF bits and ideas ready to go when I can get away from this PI business as well

i'm sure VLF detectors won't be the same when you get done with them....

[moodz]

i'm sure VLF detectors won't be the same when you get done with them....

LOL

[Aziz]

I am happy to announce that agreement has been reached to deliver a new technology PI detector based on recent developments and technical advances in this field. The detector will be designated as the QED-PRO. It will utilize the high performance QED platform as a base with a new frontend based on cutting edge discoveries surpassing all known prior art.


You will be able to see what all the fuss is about ( or not ) in the not too distant future. In the mean time I will plug away at sharing as I much as I can when I can.

*LOL*

It's the end of <... you know who & what ...>

Aziz

[Davor]

So you'll marry your exciter with QED. Nice. From what I understood, QED is the only design that takes care of S/N in PI detection by means of extended sample time (T=1/f, T^ -> fˇ-> noise~sqrt(f) -> noiseˇ), thus going deeper. Nice. Two flies with one blow.

I guess a you-know-what company will not be hurt that much because they are already established ... everywhere, and people are not going to throw away their otherwise working detectors, just because there is a much better detector available. Heck, I drove my li'l Fiat for over 15 years knowing there are much better Ferraris available.

A real blow would come if, and only if the interface of a new rig can be adjusted to provide look and feel of a you-know-which company's top line detectors so that faithful users do not get overly confused. In that case they'd say: "It is like you-know-what detector on steroids :blink:!"

[WM6]

I am happy to announce that agreement has been reached to deliver a new technology PI detector based on recent developments and technical advances in this field. The detector will be designated as the QED-PRO. It will utilize the high performance QED platform as a base with a new frontend based on cutting edge discoveries surpassing all known prior art.

One the best things what you and BW (QED author) can do.

Best wishes to new team.

[satdaveuk]

as they used to say in the old english dads army tv series: stick it upum

We all now how hard you worked for this so all the best, and god knows you deserve it.

[straton]

Do not expect major improvements in metal detectors. What I expect, is cheap, good detectors for everybody. We have pretty much reach the bottom of the barrel of existing technologies is productive for us all, to have ambitions and dreams. Personally, I am doing my last design with PI. After that, I shall test some completely new ideas of metal detecting.

[moodz]

Do not expect major improvements in metal detectors. What I expect, is cheap, good detectors for everybody. We have pretty much reach the bottom of the barrel of existing technologies is productive for us all, to have ambitions and dreams. Personally, I am doing my last design with PI. After that, I shall test some completely new ideas of metal detecting.

That is a bit defeatist ... there is always something to improve .. mostly because people look past the obvious stuff ...In PI technology everyone has assumed that the critical damping equation is the optimal solution and then proceeded to improve everything past the coil and damping resistor ...I offer some evidence below to show that if you want to make a chain stronger you have to look at the first link as well as the ones in the middle...

...I have used a minelab 18 inch coil which on a good day might get 8 microseconds to first sample .... the results below show that it can be done in 4 microseconds with very large target response.
The autodamping is functioning but the signal is not amplified ... note the signal response for a non ferrous target at the vertical marker ... I wont bother publishing a ferrous target

.....see it does work in real circuits .... not just sims.

The circuit can be used on any existing PI design IMHO. No manufacturing issues or part sourcing and it "tunes" the PI coil to have a perfect response so you coil hackers will have a wider window to play in with regard to coil parameters like inductance and resistance.

[Aziz]

Hi Paul,

ground balance gets difficult, when the residual voltage is swinging at the coils self resonance frequency. It (frequency) will be changed due to ground conditions (coils inductance changes slightly).
It needs some refinement of the damping I think.
Aziz

[Carl-NC]

The autodamping is functioning but the signal is not amplified ...

So is this the signal prior to the preamp?