Author Topic: PCB based B-Field Probe.  (Read 4488 times)

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Offline varno

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PCB based B-Field Probe.
« on: April 27, 2014, 10:00:40 pm »
I was talking to a mate over the weekend, and the idea came up that a B-field probe based on a 4-layer PCB might be a cool and inexpensive tool. So, I designed a one in a couple of different sizes. Is anyone else interested in me posting the design files?
 

Offline Harvs

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Re: PCB based B-Field Probe.
« Reply #1 on: April 28, 2014, 11:01:35 am »
Sure just post them.  It's hard to know if I'm interested until I see it  :)

If you're going to, lots of people will be grateful if you put up a PDF or images as well as the design files since everyone uses different EDA packages.

Do you have any measurements against known sources (or compared to known probes) to calibrate the design?
 

Offline T3sl4co1l

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Re: PCB based B-Field Probe.
« Reply #2 on: April 28, 2014, 03:00:41 pm »
Another idea:
http://www.hpe.ee.ethz.ch/uploads/tx_ethpublications/Rogowski_Coil_02.pdf

A Rogowski is for sensing current (the air-cored coil feeds an integrator circuit to produce a signal representative of the enclosed current), but the same idea applies if you're looking to make a spiral or multilayer (external rather than enclosed field) planar coil, transformer or sensor.

Tim
Seven Transistor Labs, LLC
Electronic Design, from Concept to Layout.
Need engineering assistance? Drop me a message!
 

Offline Dago

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Re: PCB based B-Field Probe.
« Reply #3 on: April 28, 2014, 08:30:23 pm »
Another idea:
http://www.hpe.ee.ethz.ch/uploads/tx_ethpublications/Rogowski_Coil_02.pdf

A Rogowski is for sensing current (the air-cored coil feeds an integrator circuit to produce a signal representative of the enclosed current), but the same idea applies if you're looking to make a spiral or multilayer (external rather than enclosed field) planar coil, transformer or sensor.

Tim

I saw a similar paper and it looked really interesting so for my next PCB order I'm ordering this (hard to see but its a 4-layer rogowski):

Come and check my projects at http://www.dgkelectronics.com ! I also tweet as https://twitter.com/DGKelectronics
 

Offline varno

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Re: PCB based B-Field Probe.
« Reply #4 on: April 28, 2014, 10:54:55 pm »
Here is the pdf design, I am having trouble posting the altium files. The trace is a shorted loop of grounded 50 ohm stripline on the 4-layer oshpark stackup. this design has a 1cm loop diameter. I am going to order them some time this week, i have a split coax that I could do some measurements with however I am not sure how to do the calibrations.
« Last Edit: April 28, 2014, 10:58:16 pm by varno »
 

Offline gazelle

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Re: PCB based B-Field Probe.
« Reply #5 on: June 18, 2014, 07:03:54 am »
Hello Varno - This is a nice project ! How are the test results ?

Can you send the altium files ? There is a free tool www.wetransfer.com that accepts files upto 2GB.
My email address is: mit-embsys@telenet.be

Thank you !
Best regards,
Michel
 

Offline eecook

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Re: PCB based B-Field Probe.
« Reply #6 on: June 04, 2018, 01:58:39 pm »
Hi Varno,

Just wanted to check on the status of the project. Do you have any results you might want to share?

Simon.
Nullius in verba
 

Offline Rerouter

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Re: PCB based B-Field Probe.
« Reply #7 on: June 04, 2018, 03:22:31 pm »
eecook, varno has not been online since september 2017, you may have better luck sending him a private message, Dago however was online just a few days ago

Equally interested in this, these designs seem quite painful to layout in most packages
 
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Offline eecook

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Re: PCB based B-Field Probe.
« Reply #8 on: June 13, 2018, 07:46:41 am »
eecook, varno has not been online since september 2017, you may have better luck sending him a private message, Dago however was online just a few days ago

Equally interested in this, these designs seem quite painful to layout in most packages

I found this... http://www.ti.com/tool/TIDA-01063
It has Altium files and all.
Nullius in verba
 

Offline CopperCone

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Re: PCB based B-Field Probe.
« Reply #9 on: June 14, 2018, 03:17:31 pm »
I would love to know how that rogawski coil turns out. Winding one is ridiculous. A PCB based one would be good if on a 4 layer board with two shields, so you can cut it out and stick copper tape on the seam

that is like 1000$ otherwise. I have threads about them, they are evil bastards.
« Last Edit: June 14, 2018, 03:19:09 pm by CopperCone »
 


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