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Author Topic: Introduction and concept for 3d magnetic field visualiser  (Read 6004 times)
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Thank you for your input Slider,
There are cheaper chips for 5 bucks but the 14 dollar 90393 is important as it will handle high gauss and has excellent internal calibration settings and can be i2c addressed. and later SPI  as more response may be required.


The code is what runs on the arduino nano to send the xyz data to the pc .

The PC displays the graphic and does need to be large.
A different processing program on the pc displays the bunny .
 ,calling for the xzy values from the usb com port.

The first step is a single unit in the centre (hand held or mounted in the centre of the device being tested /built.
Bunny rotate is the best example

The implications for all kinds magnetic research are obvious
Anybody curious as to how a coil or a series of coils may interact with the field that is already there should get a lot just from making a single unit .

It is my contention that it will enable intuitive research ,a tool that has never been available before .
I would suggest that we have been working in the dark ,having said that ,this would not need to be calibrated ,rather orientated.

You could have a beeper sound when the 6 external field sensors behave in a certain way ...so many possibilities and


sensing field rotation at a distance around the unit being tested will show the kind of influence that SM and Spherics has indicated as important.
There would be no doubt that your generated field is rotating and would avoid boom and bust scenario as well being able to use safe voltages ,as 99% of people, for their own good reasons avoid .

It would encourage analogue  wave forms  from multiple sources  allowing a control unit to be built in the neutral space in the middle

These things are exactly like gyro chips in the way they output data xyz..


All of this assumes that is possible to"tune into magnetism "
I like to imagine that it may be possible to sail on the field or in the field
And any body  cares to  see the invisible world of mag fields ,rather than a hand and thumb  like in kinder-garden.

Does a spinning/rotating /modulated  mag  field have inertial properties under certain conditions?


Here is some study material that is relevant
https://hackaday.io/project/11865-3d-magnetic-field-scanner

« Last Edit: 2018-03-06, 08:29:31 by 3D Magnetics »
   
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http://www.rotoview.com/sensor_kinetics.htm

member Hope at Stefan's shared this today

here http://overunity.com/17633/smart-phone-magnameter-app/msg517785/#new

[sorry if similar was already mentioned]

 to note, I have been told that there are other portable devices available to do this ,view the magnetic field [not certain of cost]

will have to ask for more info.

respectfully
Chet K
   
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A good subject Chet,
Dumbing it down to a 2 dimensional  APP would be the wrong direction as we need to develop external integration of multiple sensors as the comments suggest.
A small screen would not achieve the goal ...but should inspire what i propose here in the first post.
That is not to say  a vr environment will not apply later as / if we learn .
Like so many things we tend to shoot for the stars when we know so little of what is under our feet .
3D is key ..Im sorry  i have to repeat it . The screen in front of you will do it .single raw magnetometer data to start with.
Shopping for apps might be  fun however and that is the problem in this age of delightenment.
All of this is probably too late as everything is packaged and upsold.
I am not harping on about high voltages and electron tubes at least !
This is also not a control circuit but a means to get to first base in a collaborative way ,which protects everybody .

This is about building one ...please respect the aim and intent of building one here .
There are too many cases of people having momentary success yet not knowing what is happening .

WE do know that rotation of  fields are important
I will assume that noisy signals are unpredictable even in one dimension


some relevant material is here if you are interested in participating physically
https://hackaday.io/project/11865-3d-magnetic-field-scanner
« Last Edit: 2018-03-06, 09:06:37 by 3D Magnetics »
   
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... .-.. .. -.. . .-.
Have bought this one:
https://www.ebay.com/itm/CJMCU-90393-MLX90393-Digital-3D-Hall-Sensor-Displacement-Angle-Rotate-3D-Positio/112460263873
 O0

It's going to be 3 weeks or so before it arrives, but there are several projects here in front of it all.
Am going to d/l Processing and have a look...(for the several years i've built stuff with uc's it hasn't featured).
Oh, of possible related relevance - system here is a tower PC, Q6600, Linux Mint 18.2
All in all, yes this needs to happen and it needs to be at a price point that all can afford.
Do you have a Github space set up ?
The need will be to share, manage, improve code and to have test environments in various locations that can verify results. Well, I know you've thought this through, am just looking at pitfalls that often stop development, as stated.   



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Have bought this one:
https://www.ebay.com/itm/CJMCU-90393-MLX90393-Digital-3D-Hall-Sensor-Displacement-Angle-Rotate-3D-Positio/112460263873
 O0

It's going to be 3 weeks or so before it arrives, but there are several projects here in front of it all.
Am going to d/l Processing and have a look...(for the several years i've built stuff with uc's it hasn't featured).
Oh, of possible related relevance - system here is a tower PC, Q6600, Linux Mint 18.2
All in all, yes this needs to happen and it needs to be at a price point that all can afford.
Do you have a Github space set up ?
The need will be to share, manage, improve code and to have test environments in various locations that can verify results. Well, I know you've thought this through, am just looking at pitfalls that often stop development, as stated.
Thank for your input Slider ,
Those are exactly what I am using .
I would rather we did everything here as the code we will use will be easy to paste or zip up .
there will only be 2 main packages ...the arduino code ,to communicate  and the host code (processing or python)to display
It should not matter pc or linux from what i understand .

I know that we would have to agree on the libraries used and there are so many libraries with the same name it could be confusing for some ..i have been caught out too many times .

I would rather steer away from using 3rd party repositories and keep it all here with forum members at least for the development period. And it would be open to all members ,even the public.
a zip package with libraries and running code should not be too large at first.
It may be possible not to use anything but the common wire library? My skills here are fairly low so no, i have not though this through beyond knowing that this tool will be required for continuity when testing coil arrangements .
As far as coding is concerned I can make things work but very untidy an as my health is poor my brain function varies randomly.
I once wrote a program that was 3 pages long (commodore 64) i showed it to my brainiac friend and he reduced it to 12 lines .
I worked the same but was not ever critical on memory or execution speed.

RE my health
Chronic fatige syndrome is the best that the medical profession can do ,but I keep looking even if they don't /can't.

I even wonder if screwing about with hv and spin fields may be bad for health and there is some evidence of this .
Many people have contacted me over the years warning of health issues .

Otto's death was one where the timing cannot be excluded.

Gk made a ring that scared him enough to want to put it in a microwave oven .

SM had throat cancer and also questioned the health implications .

That is why it is important to be able to work with low velocities and low voltages . And to be able to see the field of influence .

Whatever we do it can not be in the magnetic darkness we currently work in.

There may be medical implications here both positive and negative .

There are many articles on NMR which are inspiring and educational but focused on body imaging only.

But it is help i /we require and can I ask what the pitfalls of keeping it all here might be  ?
As we move forward just keep ver1. 1.01 1.02 etc so that any body can go back or forwards.
I would possibly get out of hand but we could change it as the problem develops .
For now it is small and we need to think of something better than a rabbit spinning ...though it is easy to see.

The outer field ring as a multi coloured torus ?...six rabbits wont do it but it it would be the starting point.
I mean 7 counting the middle one.

While im at it, i can explain why 6 .
Imagine a cube with six faces all with an arrow pointing a single point any where within the cube .
It takes 6 to be accurate ...except we are detecting the field disturbance from that virtual single point which make it possible to spin tilt and tumble, raise and lower, the outer ring in a virtual space ..the computer screen .
It is simple yet  complex and easy to over think .
There are many iterations of reference that will grow as understanding progresses ...but simply it is 7 sets of xyz axies.
A common zero button will be important .

The spacing of the 6 sensors will be up to the user but at few meters they detect a neo magnet easily
,and can be gain adjusted for all axies,they would be top/bottom/left/right/back/front ...luckily they all have different first letters......oh and c for centre.



I know it takes time to get these things in the mail ,one lot took 5 weeks (aliexpress seller)
I also know that one you get one up and running ...you will share in my enthusiasm.

Thanks
3D
   
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... .-.. .. -.. . .-.
Perfectly fine to post the code here....I prefer it, hopefully others too.
It's just the amount of things that seem to be on Github, like Sourceforge used to be. Knowing you wish to post here is perfect for the project, because it allows for a history, for the latest code to be the last version posted and can show folks in the future how it progressed to whatever point it's at when they take an interest.
Very often in my own coding, a section may begin to give troubles after a feature is added and i'll load up a previous version, to redo whatever it was from that point. The new code then works and gets the newest version number. The thread might well work in that way too.

Sorry to hear about the cronic fatigue. Am not sure if I have something similar. About 5 years ago something bit the lower of one leg and it all went rock solid on the calf to about the diameter of the base of a large pills bottle. It lasted for about 2 months and slowly faded. After that, even getting to the mailbox can leave the legs completely tired out and so sluggish that it's like dragging them using the hips. But, other times a half mile run may be possible (am 48). Best guess is some form of tick got me, or a spider.

For magnetic issues, yep, can relate there. Personally I have troubles if messing with neodymiums when perhaps rewinding an RC motor. Strong field changes and exposure that's above a few minutes, which I would imagine is a common problem. 

A library may offer a shortcut and the Adafruit ones are normally good and reliable. But am simply thinking about no need to reinvent the wheel.
Speaking of which: https://github.com/tedyapo/arduino-MLX90393
There seem to be a couple of different libraries.
A library could be used as is, or studied and part replicated. Am thinking of the MIDI library for an example of that, where only parts of it may need to be used. Whereas a TFT screen library may need everything.


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The MLX90393 has arrived.
Will be having a look at it over the next couple of days :)


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Good news Slider,
Im not very with it of late but will be better soon i hope.

I have excellent information that a cause or effect was a coriollis type magnetic effect that reduced to null in the middle and fell off at distance .

It was never discovered for certain which was cause or effect but the structure of out known world suggests both.

Im sure you will get inspired once you start seeing how responsive thse things are .
   
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I would like to pose a basic scenario to the brains trust here in hope that there may be some better equipped mentally than myself.

Does a transformer driven by an ac or dc signal of single phase and source from single supply, saturate and desaturate the same as one that is driven from split supplies or  polarity reversed single supplies like a h bridge?

My question relates to wether we are in fact failing to interact with our surroundings by not understanding the difference and more importantly not applying it .

I could be wrong, as well as niave ,but perhaps we are missing one comlete half of what is important?
push pull tecniques were emphasised by SM on several occasions .
As was field rotation .

   
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It's turtles all the way down
3D asked:
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Does a transformer driven by an ac or dc signal of single phase and source from single supply, saturate and desaturate the same as one that is driven from split supplies or  polarity reversed single supplies like a h bridge?

Do you mean symmetrical saturation / de-saturation?

I would think a single ended supply source of AC should saturate and de-saturate a transformer symmetrically if the amplifier or oscillator output driving the transformer is capacitance coupled to the transformer.

I think in any case it boils down to current drive and drive reduction both forward and reverse required to saturate/de-saturate the transformer,

however a transformer will automatically de-saturate if the driving single ended supply is disconnected or if forward current is reduced.

If the supply is slowly brought to zero current, there may be some remanence in the core when the transformer comes out of saturation.

This and other factors can result in "flux walking" which can cause early saturation on subsequent cycles.

We have not yet touched upon loading effects on the secondary of the transformer and how this affects saturation.

Maybe if you state the idea or what you have in mind in another way or draw a simple set of schematics we can pitch in some ideas.

What is it would you like to do or try or have in mind? We can test it for you.

Regards


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