ELEKTRO FORUM

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.

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 cant deep-link to anything on Tripod.

On Thu, 10 Mar 2005 13:53:35 -0800, JeffM wrote:

> 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 cant deep-link to anything on Tripod.

It works for me.

Thanks,
Rich

On Thu, 10 Mar 2005 22:32:48 GMT, the renowned Rich Grise
<richgrise@example.net> wrote:

>On Thu, 10 Mar 2005 13:53:35 -0800, JeffM wrote:
>
>> 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 cant deep-link to anything on Tripod.
>
>It works for me.
>
>Thanks,
>Rich

Me too.


Best regards,
Spehro Pefhany
--
"its the network..." "The Journey is
the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

On Thu, 10 Mar 2005 17:47:27 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

>On Thu, 10 Mar 2005 22:32:48 GMT, the renowned Rich Grise
><richgrise@example.net> wrote:
>
>>On Thu, 10 Mar 2005 13:53:35 -0800, JeffM wrote:
>>
>>> 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 cant 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

Boris Mohar wrote:
>
> 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


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


--
?

Michael A. Terrell
Central Florida

JeffM wrote:
> Aziz wrote:
>
>>[blather about this demonstrating prior art for
>>Concentric PCB Induction Balanced Coil for Metal Detectors]
>>

So wheres 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!

In article <R66dnTKOAcrHOKzfRVn-gw@buckeye-express.com>,
Mark Jones <abuse@127.0.0.1> wrote:
>JeffM wrote:
>> Aziz wrote:
>>
>>>[blather about this demonstrating prior art for
>>>Concentric PCB Induction Balanced Coil for Metal Detectors]
>>>
>
> So wheres 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.


--
--
kensmith@rahul.net forging knowledge