Standardized Tests for Metal Detectors

[ivconic]

Thank's Nupi.
Video is good enough.
Testing is making a point, now is time to disclose details...
Looking forward!

P.S.
Very cute little dog!
Wonderful bit for my cats!
Yet not enough for decent lunch!

[Nupi]

My dog is a german shepherd. When he came home one day very dirty my wife has put him in the washing machine then
they shrank 5 sizes.


She breakfast every day 2 cats.




Where is the schematic?????????

[ivconic]

My dog is a german shepherd. When he came home one day very dirty my wife has put him in the washing machine then
they shrank 5 sizes.


She breakfast every day 2 cats.




Where is the schematic?????????

Why do you need it so badly, what for?
It is just good s/n frontend opamp based and Microchip and nothing else...
Not worth of tracing nor copying it at all... trust me!
...
Your success with needle detections is excellent and very interesting!
If you can't commercialize it than don't keep it so secret!
Disclose it here!
Cheers!

[Nupi]

Why do you need it so badly, what for?
It is just good s/n frontend opamp based and Microchip and nothing else...
Not worth of tracing nor copying it at all... trust me!

I love sputtering and cracking detectors and mine does not do that. Therefore, I would like have the schematic of the Deus.
I love that sound.

...
Your success with needle detections is excellent and very interesting!
If you can't commercialize it than don't keep it so secret!
Disclose it here!
Cheers!

First bring me into contact with the chief of Deus then we'll talk.

[WM6]

Nupi, thanks for all your efforts with testing and making video.

As seen on your video, you do have world the best metal detector now and ivconic can jump on his Deus, or modify it using hammer.

You done good job. Resolution could be better, but you evidently done your best to demonstrate that all is clear. Very fair from my point of view.

Despite of your honest work, I still have reserve to acknowledge this as "miracle". Still need to prove that those Terumo needle is out of the same alloy as (undetectable) mine. For now I stay with "to good to be true" and this is not related to your work on test at all.

Namely I got the same results as you, with sewing needle of same size, but never with hypodermic.

Another point: some of mine detectors can detect my hand at max sens, you weaving hands along coil without sound.

So I decided to buy identical Terumo needle and done some test before my final miracle acclamation.

You say that your detector is modified. What sort of modification is this (in general, no need to discover some secret, if exist)?

Many thanks for your time and efforts with test again.

[green]

Looked like a challenge. I plotted a .25 x .25 inch aluminum foil and a hypo needle that I have. I can see a change on the chart for the foil but not the needle. Both had a change of about 1 mv out of the integrator. Gain about 140. Had to put targets inside a 1.5 inch coil. Don't know why I see a change for foil but not the needle on the chart

[Nupi]

Nupi, thanks for all your efforts with testing and making video.

As seen on your video, you do have world the best metal detector now and ivconic can jump on his Deus, or modify it using hammer.

You done good job. Resolution could be better, but you evidently done your best to demonstrate that all is clear. Very fair from my point of view.

Despite of your honest work, I still have reserve to acknowledge this as "miracle". Still need to prove that those Terumo needle is out of the same alloy as (undetectable) mine. For now I stay with "to good to be true" and this is not related to your work on test at all.

Namely I got the same results as you, with sewing needle of same size, but never with hypodermic.

Another point: some of mine detectors can detect my hand at max sens, you weaving hands along coil without sound.

So I decided to buy identical Terumo needle and done some test before my final miracle acclamation.

You say that your detector is modified. What sort of modification is this (in general, no need to discover some secret, if exist)?

Many thanks for your time and efforts with test again.

Thank you for your feedback WM6.


I am very sorry that the video became bad. I leave soon to make my laptop.
I have deliberately used various renowned brands of various sizes.
I also checked larger sizes but I did not show in the video so that are not be could said it be easy targets.
But that is not true in my experience, because after as they get bigger,
the detection distance is not so much bigger.


Here in the Netherlands you can find many needles size 25G 1 " 0.5 X 25 in the parks from drug addicts.
That I also tested with good results.


It's no trouble for me to send you needled I tested and I mean new in sealed packaging.


On the modification, I would not tell you too much right now (as you can understand)
As you maybe noticed the MD is very quiet almost no sputtering and cracking. The setting of the MD is different
from normal. I do not believe in big gain. The "secret" is in the box to the coil has a "phase turning component" More I can not tell at this time.
I want to perfect it and want to experiment with a smaller coil.
But actually wants to build a detector that I can handle all my ideas, and that is with te Smart not possible.
So I go quietly first think about what I want to do.


Can you give me the brand and type of needles that you tested? Then I can test my MD.

[WM6]

It's no trouble for me to send you needled I tested and I mean new in sealed packaging.

Can you give me the brand and type of needles that you tested? Then I can test my MD.

Thank you for your kindness nupi, but today I already ordered my Terumo needles (NN-2613R Brown 26Gx1/2” 0.45 x 12 mm) from UK eBay seller.

Collection of 6 needles, I tested, was returned back to person who asked me for test and find suitable detectors (with no success as I say). Needles was very different in size and probably in producer too, I don't remember anymore which brand. No one was detected with about dozen detectors tested in period of more than year. He left me small one as testing sample, just for case, it is without package and I don't know brand.

[Nupi]

OK, I get it.
I definitely think there are metal alloys that are very difficult even impossible to detect.
I can remember once I've tested a needle, which appeared more to a "nail" then on a needle.
But the detection was slightly less than with a needle 26G X 1/2".
But because the needle was so big and practice, probably will not find in the park, I did not given attention further.
I'll go searching this needle.

What you need to consider is that the detection of the needle (parallel to the DD coil) have the least detection depth.
Look # 43. This means that you in practice at least two times the same park should search.
I have more to improve my MD to be truly successful in practice. I definitely need to double the detection distance.
The grass is not always pretty short cut and the needles are not beautiful on the surface of the playground.
So it's just wait and see if I succeed.

[Nupi]

I'm more concerned about the can thickness, but it should also be consistent. If you see a symbol like these:
[ATTACH=CONFIG]30242[/ATTACH] [ATTACH=CONFIG]30241[/ATTACH]
It should be aluminium.

I also think we should take into account that the manufacturer the thickness of aluminum or alloy can change.
That means that we need a control/standart MD who regularly checked the standart targets and in case of doubt.

[Nupi]

Ivconic,
have you had contact with the boss from Deus to negotiate. I've made the new logo.
The new coil is not from nexus, do not worry about it.
But the new coil is from Audi.

[ivconic]

Looks like "8" shaped coil.
Bahhh... that's already seen before.

[ivconic]

Thank you for your feedback WM6.
... The setting of the MD is different
from normal. I do not believe in big gain. The "secret" is in the box to the coil has a "phase turning component" More I can not tell at this time.
.... Then I can test my MD.

You already are telling us now...
If that is all about playing with phase; than we have some starting point!
How about if we scope the front end output and see what changes are produced when needle is swing in front of the coil?
Must be some changes in signal, right?
But you are lucky now because i don't have scope no more, i sold it last year and stopped to do Electronics.

P.S.
XP owner's email is public, you may contact him at their official site.
He is polite man, he will reply to you for sure.

[Nupi]

Good morning Ivconic,
I can make a cloverleaf shaped coil for you if you want?

[ivconic]

Anyway... your results are interesting.
Would be nice to test such setup on soil, don't you think?
If you have real thing than you can make commercial design.
It may become very useful human demining tool.
As probably you followed similar topics in the past here, Tinkerer had interesting ideas too.

P.S.
"...Good morning Ivconic..."
Yeah! You may say that again! I just woke up!
As any other decent Dutch; i also had several barrels of beer last night, watching Croatian catastrophe in Brazil!