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Concentric PCB Induction Balanced Coil for Metal Detectors

A

Aziz

Jan 1, 1970
0
Concentric PCB Induction Balanced Coil for Metal Detectors

Hello,

I am using a concentric printed circuit induction balanced coil (ca.
20 cm diameter) for a metal detector and had phantastic measuring
results:
- very low temperature dependency (size invariant design)
- very thin dimension (ca. 3 mm)
- very easy to build (just making a pcb-board)
- no balancing needed (computer designed geometry - thus automatically
balanced)
- most of the area is for the rx-coil
- combined small rx and big rx-coil (due to the geometry, the rx-coil
is a spiral from the inner side to the outher side)
- bigger transforming effect (nummer of turns for rx-coil is much more
then for the tx-coils), to reduce the gain of the amplifier, thus
reducing also noises of the amplifier.

Therefore, it is very sensitive even to small metal objects (nuggets).

Attention:
By disclosuring of such an induction balance PCB coil now, it is not
any more possible to patent such pcb ib-coils. Especially, this kind
of pcb-ib-coils containing four coils, big receiver coil area, 1
winding ground balancing/fine balancing coil, transmitting coil and
canceling coil.
Disclosure Date and Time:
First Disclosure: 4. March 2005, 10:08 MEZ
Updated: 10. March 2005, 15:01 MEZ

If you want to the the sensor (search coil), just follow the link
below:
http://ibcoils.tripod.com/album/index.album?i=0&s=1

original image:
http://ibcoils.tripod.com/album/wien2.GIF

Some details:
20 cm diameter
600 DPI Resolution

from the inner coils numerated
- rx-coil
- canceling-coil
- one winding coil for special use (ground balancing coil / fine
balancing)
- tx-coil

Aziz

PS: May be your browser cannot show such a big image. Just download
the image and use an image-viewer.
 
B

Boris Mohar

Jan 1, 1970
0
Aziz wrote:
[blather about this demonstrating prior art for
Concentric PCB Induction Balanced Coil for Metal Detectors]

original image:
http://ibcoils.tripod.com/album/wien2.GIF

You need to test links before posting them.
You can't deep-link to anything on Tripod.

It works for me.

Thanks,
Rich

Me too.


Best regards,
Spehro Pefhany

This works for me:
http://ibcoils.tripod.com/album/index.album?i=0&s=1

But view full- size image
http://ibcoils.tripod.com//album/wien2.GIF
does not




Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca
 
M

Mark Jones

Jan 1, 1970
0
JeffM said:
Aziz said:
[blather about this demonstrating prior art for
Concentric PCB Induction Balanced Coil for Metal Detectors]

So where's the schematic? Or the complete article? There are only pictures and
as Jeff put it, blather. Very confusing. Concentric rings on a PCB... sounds an
awful lot like a Flux Capacitor... careful, it might warp right off your desk!
 
K

Ken Smith

Jan 1, 1970
0
JeffM said:
Aziz said:
[blather about this demonstrating prior art for
Concentric PCB Induction Balanced Coil for Metal Detectors]

So where's the schematic? Or the complete article? There are only pictures and
as Jeff put it, blather. Very confusing. Concentric rings on a PCB... sounds an
awful lot like a Flux Capacitor... careful, it might warp right off your desk!

The performance statements are a little light on numbers too. How far can
it see a 10 penny nail? How far can it see a soda can?

BTW: Metal detects see modest sized objects to depths of about 2 times
the diameter of the head at best. Very large objects such as burried
solid copper box car can be seen a little deeper.
 
R

Roger Johansson

Jan 1, 1970
0
Mark Jones said:
So where's the schematic? Or the complete article? There are only
pictures and
as Jeff put it, blather. Very confusing. Concentric rings on a PCB...
sounds an awful lot like a Flux Capacitor... careful, it might warp
right off your desk!

If you look closely there are no concentric rings. They are spirals,
which are used as inductance coils.

That pcb board with etched coils is what sits inside the circular search
head you move over the ground to hear what metals are in the ground.
That circuit board is big, something like 20cm in diameter.

(At first I thought is was a hypnotic joke picture. But as I zoomed out I
saw the coils.)
 
J

John Woodgate

Jan 1, 1970
0
I read in sci.electronics.design that Ken Smith
about 'Concentric PCB Induction Balanced Coil for Metal Detectors', on
Fri, 11 Mar 2005:
Very large objects such as burried
solid copper box car can be seen a little deeper.

I suppose they are very common in USA.
 
R

richard mullens

Jan 1, 1970
0
Roger said:
If you look closely there are no concentric rings. They are spirals,
which are used as inductance coils.

That pcb board with etched coils is what sits inside the circular search
head you move over the ground to hear what metals are in the ground.
That circuit board is big, something like 20cm in diameter.

(At first I thought is was a hypnotic joke picture. But as I zoomed out I
saw the coils.)

A little like the central portion of the first Black Sabbath LP perhaps.
 
K

Ken Smith

Jan 1, 1970
0
I read in sci.electronics.design that Ken Smith
about 'Concentric PCB Induction Balanced Coil for Metal Detectors', on
Fri, 11 Mar 2005:


I suppose they are very common in USA.

Yes they often show up in such discussions on this side of the Pond.
 
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