northwest A new thread for people wishing to publish and copyright ideas.
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australian electronic gold prospecting forum.com  |  Pi metal detector by Bugwhiskers  |  QED Detector ,latest updates  |  Topic: A new thread for people wishing to publish and copyright ideas. 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: A new thread for people wishing to publish and copyright ideas.  (Read 1979 times)
Doug
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« Reply #40 on: Thursday June 20 2019 15:47:37 AEST PM »

Are their ADC's and DAC's that have the speed and resolution to do all this?
doug smile
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bugwhiskers
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« Reply #41 on: Thursday June 20 2019 15:59:49 AEST PM »

There are many micro's available with the required ADC resolution and speed with a DSP built in.
A classic example (pardon the pun) is many people can pick out the sound of an individual instrument in an orchestra.
If you were to look at an Oscilloscope showing the combined sound waveform you would never be able to single it out.
It's early days yet but I plan on making a suitable circuit and handing it over to somebody else to do the experimental work. It could take a long while to get the desired outcome.

In a way it's very similar to AM radio. A carrier wave that is generated by the TX that is Amplitude Modulated by the ground and any metal targets within. The Digital Filter removes the constant frequency carrier and exposes the Modulation.
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egixe4
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« Reply #42 on: Thursday June 20 2019 17:04:39 AEST PM »

Hi Howard,

Would this not put an end to having to ground balance or ground track?
This method would be real time and not an averaging as per todays ground balance and tracking methods.
Or am I missing the point completely?

Mal


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bugwhiskers
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« Reply #43 on: Thursday June 20 2019 17:56:11 AEST PM »

  
Hi Howard,

Would this not put an end to having to ground balance or ground track?
This method would be real time and not an averaging as per todays ground balance and tracking methods.
Or am I missing the point completely?

Mal


The ground is an ever present signal. If it is lowered in amplitude then any disturbance in the ground (ie buried landmines containing no metal) are still discernable in comfort. The filtering should enable setting the "back" ground to a comfortable level. It will definitely be real time.
If a 3 axis accelerometer is added then a Graphics screen could be used to provide visual information.
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Northeast
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« Reply #44 on: Thursday June 20 2019 21:22:56 AEST PM »

  
  
Hi Howard,

Would this not put an end to having to ground balance or ground track?
This method would be real time and not an averaging as per todays ground balance and tracking methods.
Or am I missing the point completely?

Mal


The ground is an ever present signal. If it is lowered in amplitude then any disturbance in the ground (ie buried landmines containing no metal) are still discernable in comfort. The filtering should enable setting the "back" ground to a comfortable level. It will definitely be real time.
If a 3 axis accelerometer is added then a Graphics screen could be used to provide visual information.

I read stuff like this (actually most of this thread) and it makes me think I’m about as clever as a potato!! 
The general public are very fortunate that there are those people that ‘get’ this sort of stuff or we would all still be using rocker boxes.
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Eski
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« Reply #45 on: Thursday June 20 2019 21:38:31 AEST PM »

tiss a winner Howard. no detection hole. and no ground balance if it works how i'm thinking

probably need to spend a bit of time taking samples of different bad ground....
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« Reply #46 on: Thursday June 20 2019 22:06:48 AEST PM »

and good ground for that matter, unless there is some function that would say "gold here" if the responce differs from a formula
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Goldman
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« Reply #47 on: Thursday June 20 2019 22:23:08 AEST PM »

  
and good ground for that matter, unless there is some function that would say "gold here" if the responce differs from a formula

Need to determine the profile for all ground types, many metal targets types and sizes and gold of many different sizes, shapes and mass and then a lot of experimentation to filter out the less desirable ones and tune the filter(s) to accentuate the targets of interest. Like Howard said this could take some time.

Cheers Goldman
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Muntari
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« Reply #48 on: Friday June 21 2019 00:10:23 AEST AM »

This idea is very similar to the MPI detector, the main work of the dsp and filter requires an "on the fly" adaptive algorithm for extracting possible target signals from static and moving background noise. This "noise" includes static coil decay currents and ground.
It is not something that can be arrived at simply as it also requires the use of ever changing lookup tables, in the MPI, these tables change at set rates much like a SAT control or can be initiated by user push button followed by periodic updates. There are also adaptive thresholds and motion control sensor inputs to aid the process.
Yes a lot of work but the right way to head in my opinion.

cheers

muntari
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bugwhiskers
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« Reply #49 on: Wednesday June 26 2019 10:52:36 AEST AM »

The new GB method has been changed again for the better. In addition to an incremental increase of the 2 * short width TX the Long TX width is decremented. It was tested yesterday over a large area of disturbed ground with soils ranging from black to orange clay all damp after recent rains and the GB required no alteration.

Testing with a range of PCB copper targets shows that another benefit is the GB hole for metallic targets is now narrower.

The easiest way to describe how the new "Copyright" GB works is by comparing it to a Metal Detector that has an adjustment pot for GB and the pot is continuously being adjusted up and down.
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Blip
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« Reply #50 on: Wednesday June 26 2019 12:56:43 AEST PM »

Well done mate
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Eski
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« Reply #51 on: Wednesday June 26 2019 13:00:49 AEST PM »

Interesting , will it require hardware changes.?or just programing...
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« Reply #52 on: Wednesday June 26 2019 13:34:37 AEST PM »

  
Interesting , will it require hardware changes.?or just programing...

Just a software upgrade. There are other changes I want to add and only release after very thorough testing.
It should be all done by the time the BASH rolls around (October) so will take the tools up and save people the postage cost.
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autitch
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« Reply #53 on: Wednesday June 26 2019 13:41:09 AEST PM »

Hi Bugs,
I was wondering if there was any future plans to incorporate the ability to use DD coils ( i.e. separate the transmit TX and receive RX signal) on the QED.
AuTitch.
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« Reply #54 on: Wednesday June 26 2019 13:58:00 AEST PM »

  
Hi Bugs,
I was wondering if there was any future plans to incorporate the ability to use DD coils ( i.e. separate the transmit TX and receive RX signal) on the QED.
AuTitch.


Not at this stage. DD coils were a way of coping with hot ground but now that GB methods have improved they are not so necessary. The other advantage was broader area cover per sweep but that is about to be addressed by new type MONO coil.
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autitch
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« Reply #55 on: Wednesday June 26 2019 14:00:56 AEST PM »

  
  
Hi Bugs,
I was wondering if there was any future plans to incorporate the ability to use DD coils ( i.e. separate the transmit TX and receive RX signal) on the QED.
AuTitch.


Not at this stage. DD coils were a way of coping with hot ground but now that GB methods have improved they are not so necessary. The other advantage was broader area cover per sweep but that is about to be addressed by new type MONO coil.

Thanks for your reply.

AuTitch
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phrunt
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« Reply #56 on: Wednesday June 26 2019 14:36:37 AEST PM »

I hope you don't mind me sending my QED over from NZ for that update Bugs, sounds like something I'd want on mine :)
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autitch
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« Reply #57 on: Wednesday June 26 2019 15:18:46 AEST PM »

  
  
  
Hi Bugs,
I was wondering if there was any future plans to incorporate the ability to use DD coils ( i.e. separate the transmit TX and receive RX signal) on the QED.
AuTitch.


Not at this stage. DD coils were a way of coping with hot ground but now that GB methods have improved they are not so necessary. The other advantage was broader area cover per sweep but that is about to be addressed by new type MONO coil.

Thanks for your reply.

AuTitch

Hi Bugs,

I was wondering if you could elaborate on the "new type MONO coils".

AuTitch
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bugwhiskers
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« Reply #58 on: Wednesday June 26 2019 15:37:29 AEST PM »

  
I hope you don't mind me sending my QED over from NZ for that update Bugs, sounds like something I'd want on mine :)


When ready I will let folks know.
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bugwhiskers
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« Reply #59 on: Wednesday June 26 2019 15:39:25 AEST PM »

  
  
  
  
Hi Bugs,
I was wondering if there was any future plans to incorporate the ability to use DD coils ( i.e. separate the transmit TX and receive RX signal) on the QED.
AuTitch.


Not at this stage. DD coils were a way of coping with hot ground but now that GB methods have improved they are not so necessary. The other advantage was broader area cover per sweep but that is about to be addressed by new type MONO coil.

Thanks for your reply.

AuTitch

Hi Bugs,

I was wondering if you could elaborate on the "new type MONO coils".

AuTitch

It's an IBgold coil. I will leave it up to him.
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australian electronic gold prospecting forum.com  |  Pi metal detector by Bugwhiskers  |  QED Detector ,latest updates  |  Topic: A new thread for people wishing to publish and copyright ideas. « previous next »
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