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Pi metal detector by Bugwhiskers => QED Detector ,latest updates => Topic started by: bugwhiskers on Saturday June 8 2019 17:44:46 AEST PM



Title: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Saturday June 8 2019 17:44:46 AEST PM
A slight but important change to the QED TX/Demodulation/GB method.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug on Sunday June 9 2019 15:47:52 AEST PM
  
A slight but important change to the QED TX/Demodulation/GB method.

So is this another  potential QED update if people want it? What do you see as its advantages over the current  QED methods?
doug ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Sunday June 9 2019 16:45:11 AEST PM
Very early days yet, we could be talking months. There are quite a number of things to be improved so rather than "drip feed" I would ask people to be patient waiting for everything to be thoroughly tested. All changes are in the firmware.


1: Better GB ie ability to handle higher intensity ground variability without constant re Ground Balancing.

2: Ground Tracking.

3: A bar graph using the existing display showing signal strength and rising or falling pitch target.

4: Anything else people suggest that is viable.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Sunday June 9 2019 17:26:24 AEST PM
Just in case owners are unaware, all firmware updates are free. The owner just pays the postage both ways.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Sunday June 9 2019 17:39:44 AEST PM
hi bugs/all. what about single phase constant current?

so. what if tx had 2 voltages a high one (500v) and a low one (2-3v) and a diode placed between the 2 , so effectively the sequence is:  tx high & low  on for a few us this raises the current on the diode , then tx high switches off, the current was set at the diode so tx low stays on for however long at that higher voltage.

= reduced ground response + higher current to penetrate ground


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Sunday June 9 2019 18:18:52 AEST PM
  
hi bugs/all. what about single phase constant current?

so. what if tx had 2 voltages a high one (500v) and a low one (2-3v) and a diode placed between the 2 , so effectively the sequence is:  tx high & low  on for a few us this raises the current on the diode , then tx high switches off, the current was set at the diode so tx low stays on for however long at that higher voltage.

= reduced ground response + higher current to penetrate ground


In a hand held PI as opposed to a huge coil slung under a helicopter the TX strength doesn't have as much impact on detection distance.

The improved GB method relies on differentiation via TX length. The sample widths remain constant which is a must for cancellation of the signal generated when swinging the coil through the Earth's magnetic field.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: 6666 on Monday June 10 2019 07:37:02 AEST AM
Quote
4: Anything else people suggest that is viable.

It would be nice, that during the switch on and power up sequence that the loaded version number of the firmware flashed on the screen.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Monday June 10 2019 07:45:31 AEST AM
  
Quote
4: Anything else people suggest that is viable.

It would be nice, that during the switch on and power up sequence that the loaded version number of the firmware flashed on the screen.

The next version has the menu item number left justified making it very distinctive.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: dasenator777 on Monday June 10 2019 09:19:12 AEST AM
ground tracking would def elevate the QED to the next level fore sure. dont know if dual tone id is viable high for ferrous low for non. ::62::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Monday June 10 2019 09:56:48 AEST AM
  
ground tracking would def elevate the QED to the next level fore sure. dont know if dual tone id is viable high for ferrous low for non. ::62::
If a target is ferrous and is longer than it is wide (nail, wire etc) then it will produce a double tone if you swing the coil along its length. If you swing at 90 degress you won't get a double tone. Any time you get a target swing at 0 degrees then 90 degrees to check. It saves a lot of digging.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug on Monday June 10 2019 10:02:17 AEST AM
 Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Monday June 10 2019 11:20:50 AEST AM
  
Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::

The exercise was to create a GB that was capable of coping with larger ground variability without having to constantly re Balance. Testing has shown that it is an improvement.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: dasenator777 on Monday June 10 2019 14:22:43 AEST PM
thanks for the info bugs  ::62::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: sd220d Digger on Monday June 10 2019 16:37:01 AEST PM
  
  
Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::

The exercise was to create a GB that was capable of coping with larger ground variability without having to constantly re Balance. Testing has shown that it is an improvement.

I can see the QED is only going to get better and better.


Unlike Ricky (Araratgold) who only goes on the attack as usual.
He will never learn.

If this was a Minelab detector, then Ricky would be a Minelab defender.
You just don't get it do you Ricky


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug on Monday June 10 2019 16:40:07 AEST PM
  
  
Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::

The exercise was to create a GB that was capable of coping with larger ground variability without having to constantly re Balance. Testing has shown that it is an improvement.

How do you think this new Gb algorithm may effect the detection depth?
doug ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug on Monday June 10 2019 16:44:30 AEST PM
  
  
  
Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::

The exercise was to create a GB that was capable of coping with larger ground variability without having to constantly re Balance. Testing has shown that it is an improvement.

I can see the QED is only going to get better and better.


Unlike Ricky (Araratgold) who only goes on the attack as usual.
He will never learn.

If this was a Minelab detector, then Ricky would be a Minelab defender.
You just don't get it do you Ricky

What else would you expect from an ex ML dealer, but who is quite happy to use a coil  which JP has stated has "hijacked" ML's IP! He is totally unprincipled in my opinion!
doug ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Monday June 10 2019 17:12:00 AEST PM
  
  
  
Bugs what do you think will be the advantages of the new GB algorithm?
doug ::419::

The exercise was to create a GB that was capable of coping with larger ground variability without having to constantly re Balance. Testing has shown that it is an improvement.

How do you think this new Gb algorithm may effect the detection depth?
doug ::419::

Once the testers reports come in I will collate and post them.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Blip on Monday June 10 2019 21:56:37 AEST PM
All sounds good Howard. The beast just gets better!

Guys, i wouldnt be too concerned about the naysayers. What you know to be real is what’s most important.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Blip on Tuesday June 11 2019 10:17:02 AEST AM
Howard, im a good handyman. I put myself forward to give anything a go. Ive built my own kitchen, renoed the bathroom, rebuild car and motorcycle engines, transmissions, spray paint, reserect old car fridges. Dabble in small 12V projects, rebuilt the washing machine etc etc etc. I used to drive logging machinery, ran data cabling, metal work, NBN satellite and wireless installer...

But be buggered if i know what is going on in that graph above! Simply bloody amazing stuff. My mind boggles at how you guys know this stuff that’s obviously simple and second nature. Hats off to you.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Tuesday June 11 2019 10:39:27 AEST AM
  
Howard, im a good handyman. I put myself forward to give anything a go. Ive built my own kitchen, renoed the bathroom, rebuild car and motorcycle engines, transmissions, spray paint, reserect old car fridges. Dabble in small 12V projects, rebuilt the washing machine etc etc etc. I used to drive logging machinery, ran data cabling, metal work, NBN satellite and wireless installer...

But be buggered if i know what is going on in that graph above! Simply bloody amazing stuff. My mind boggles at how you guys know this stuff that’s obviously simple and second nature. Hats off to you.

It really isn't the rocket science that others would have you believe in order to justify the hefty price tags.
Ground Balance is about putting the energy from the target after the transmit has finished on the electronic equivalent of an old fashioned balance beam/scales.

This was actually published in a paper in 1968 by Eric Foster, long before many detector companies started developing PI detectors.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: CRUNCHBIRD on Wednesday June 12 2019 11:02:19 AEST AM
It may not be rocket science but I can assure you that Howard is in the lead with his technology. I'm just glad that I was able to add an improvement to his design with the new, now patented, front end protection circuit. I am one of the few people who is aware of the improvements that Howard is working on. All I can say is that he is working toward an awesome technology. It may however take him quite a while so keep using your QED's. They will never become obsolete. Good luck with your hunting. Dave Emery, Florida USA.



Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: sd220d Digger on Wednesday June 12 2019 14:20:42 AEST PM
  
It may not be rocket science but I can assure you that Howard is in the lead with his technology. I'm just glad that I was able to add an improvement to his design with the new, now patented, front end protection circuit. I am one of the few people who is aware of the improvements that Howard is working on. All I can say is that he is working toward an awesome technology. It may however take him quite a while so keep using your QED's. They will never become obsolete. Good luck with your hunting. Dave Emery, Florida USA.



Thanks Dave for your information.
It's good to know.

Howard is certainly kept busy with new ideas for the QED which only reinforces that he's an honest man which makes him respected by many, even by his haters (they just won't admit it)

All updates to existing QED owners are and will be free
This alone is the best thing for us prospectors.

Thank you and cheers Howard  ::69::



Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: jrbeatty on Wednesday June 12 2019 21:29:45 AEST PM
  
It may not be rocket science but I can assure you that Howard is in the lead with his technology. I'm just glad that I was able to add an improvement to his design with the new, now patented, front end protection circuit. I am one of the few people who is aware of the improvements that Howard is working on. All I can say is that he is working toward an awesome technology. It may however take him quite a while so keep using your QED's. They will never become obsolete. Good luck with your hunting. Dave Emery, Florida USA.



Good to hear from you Dave. Yes, Howard's the man to watch, can't wait to see what he comes up with next.  ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Tuesday June 18 2019 19:26:58 AEST PM
  
  
hi bugs/all. what about single phase constant current?

so. what if tx had 2 voltages a high one (500v) and a low one (2-3v) and a diode placed between the 2 , so effectively the sequence is:  tx high & low  on for a few us this raises the current on the diode , then tx high switches off, the current was set at the diode so tx low stays on for however long at that higher voltage.

= reduced ground response + higher current to penetrate ground

HI Howard , ok , so disregarding the higher Tx affect on detection depth. would would having a constant current vs the changing current of the existing design influence ground response and thus ground balance?
In a hand held PI as opposed to a huge coil slung under a helicopter the TX strength doesn't have as much impact on detection distance.

The improved GB method relies on differentiation via TX length. The sample widths remain constant which is a must for cancellation of the signal generated when swinging the coil through the Earth's magnetic field.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Tuesday June 18 2019 19:31:27 AEST PM
Also , what about taking an input after the LP filter to assist in automating the GB....? surely there is some reason why ML and whites are looking at these arrangements? albeit theirs swings from +ve to -ve (bipolar) im suggesting keeping it unipolar.

Or packaging the screen and control  box together? - i've already broken petes bracked and the ribbon cable...


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Tuesday June 18 2019 20:16:32 AEST PM
I am looking at a number of ways to improve GB and a form of tracking.
Re the bracket and ribbon cable, no idea how they broke.
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box needs to be light and all controls within thumb reach. This ideal recipe is the current design.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Northeast on Tuesday June 18 2019 20:54:49 AEST PM
  
I am looking at a number of ways to improve GB and a form of tracking.
Re the bracket and ribbon cable, no idea how they broke.
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box need to be light and all controls within thumb reach. This ideal recipe is the current design.

Agreed Bugs.  Used Blips older style QED on the weekend and the newer version is far better ergonomically.  Hope the work re: new GB methods and tracking bear fruit for you (and us).   

Cheers, NE.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: jrbeatty on Tuesday June 18 2019 20:56:58 AEST PM
  
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box need to be light and all controls within thumb reach. This ideal recipe is the current design.

Agreed. Current layout ideal. Ground tracking will be the icing on the cake   ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Goldman on Tuesday June 18 2019 21:01:09 AEST PM
  
I am looking at a number of ways to improve GB and a form of tracking.
Re the bracket and ribbon cable, no idea how they broke.
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box need to be light and all controls within thumb reach. This ideal recipe is the current design.

I’ve used both the PL1 and the PL2 and find the PL2 the best to use ergonomically and functionally.  

Cheers Goldman


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: jrbeatty on Tuesday June 18 2019 21:12:02 AEST PM
  
I’ve used both the PL1 and the PL2 and find the PL2 the best to use ergonomically and functionally.  

Cheers Goldman

My PL1 prototype is now a cupboard ornament but found many chunky ozs in its time. Wouldn't hesitate to reinstate it though if the pl2 is having a days sick leave - or whatever.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Goldman on Tuesday June 18 2019 21:15:38 AEST PM
  
I am looking at a number of ways to improve GB and a form of tracking.
Re the bracket and ribbon cable, no idea how they broke.
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box need to be light and all controls within thumb reach. This ideal recipe is the current design.

Let’s not forget that Howard’s objectives in creating the QED was to “create a performance competitive detector at a realistic price for fellow prospectors”, so rest assured that any changes will always have “fellow prospectors” interests at heart and can therefore only make a great detector a really great detector for all of us.

Cheers Goldman


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Wednesday June 19 2019 08:45:25 AEST AM
i think i have an early pl2, the bracket broke as it was an early one (like a bent dorito) , now replaced with a piece of bent aluminium. i'm working on the ribbon cable though  ideal would be for it to go through the handle...(. bit hard with a newborn... but agree pl2 is a fair way more ergonomic...


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Wednesday June 19 2019 08:46:51 AEST AM
what about a wireless transmitter and receiver as an option?


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Reg Wilson on Wednesday June 19 2019 09:39:41 AEST AM
Eski, happy to recommend the Quest wireless system. Good value.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Blip on Wednesday June 19 2019 11:26:16 AEST AM
  
  
I am looking at a number of ways to improve GB and a form of tracking.
Re the bracket and ribbon cable, no idea how they broke.
The early models had everything in one box up front and it's not good ergonomically. With the coil up front there needs to be weight at the rear to counterbalance it. The control box need to be light and all controls within thumb reach. This ideal recipe is the current design.

Let’s not forget that Howard’s objectives in creating the QED was to “create a performance competitive detector at a realistic price for fellow prospectors”, so rest assured that any changes will always have “fellow prospectors” interests at heart and can therefore only make a great detector a really great detector for all of us.

Cheers Goldman

And the least we can do is provide constructive feedback for all to benefit from from which we have invested in.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Blip on Wednesday June 19 2019 12:12:04 AEST PM
  
Eski, happy to recommend the Quest wireless system. Good value.

The Quest that Northeast was running looked to be a great unit. He was very happy with it.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Thursday June 20 2019 14:17:35 AEST PM
Another idea for Copyrighting.
Those with a background in Electronics will understand it.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug on Thursday June 20 2019 14:29:54 AEST PM
  
Another idea for Copyrighting.
Those with a background in Electronics will understand it.

For the  layman could you  briefly  summarize the idea in a few words.
doug ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Thursday June 20 2019 14:56:04 AEST PM
  
  
Another idea for Copyrighting.
Those with a background in Electronics will understand it.

For the  layman could you  briefly  summarize the idea in a few words.
doug ::419::

I am very busy ATM so this will be very brief.
Virtually all current PI detectors use sample/integrate method to minimise EMI, remove the ground signal and Earth Field.
This new method finely digitises the decay curve that is then digitally filtered to extract the modulation of the background ground sound by any targets within. The required circuitry would fit inside a matchbox.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Thursday June 20 2019 15:07:04 AEST PM
An interesting article that is akin to the method.
Transmit a signal then digitally/ear-brain process the reception.

https://www.sciencemag.org/news/2014/11/how-blind-people-use-batlike-sonar


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Doug 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 ::419::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: egixe4 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




Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Northeast 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski 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....


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski 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


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Goldman 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


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Muntari 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


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Blip on Wednesday June 26 2019 12:56:43 AEST PM
Well done mate


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Wednesday June 26 2019 13:00:49 AEST PM
Interesting , will it require hardware changes.?or just programing...


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: autitch 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: autitch 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


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: phrunt 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 :)


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: autitch 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


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers 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.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: jrbeatty on Wednesday June 26 2019 18:07:00 AEST PM
You're a bloody wizard, Howard   ::10 ::

Don't you ever sleep?  ::419::

The Russkie coils are kicking goals on the "Z" (much to JP's annoyance  ::620::)

I'll have to try the GPX X mono's on the Kwed when I'm down next.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: phrunt on Wednesday June 26 2019 18:45:19 AEST PM
based on my experience with the 12x6" X-coil on the QED I think you'll be impressed.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: jrbeatty on Wednesday June 26 2019 19:15:15 AEST PM
  
based on my experience with the 12x6" X-coil on the QED I think you'll be impressed.

Thanks Simon. Good to hear.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Muntari on Wednesday June 26 2019 20:03:13 AEST PM
  
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 is incrementally reduced. 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.

That's great news Bugwhiskers

cheers

Muntari


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: mylab on Thursday June 27 2019 13:02:54 AEST PM
As most would know if using a GPX operating in Fixed GB with a mono coil and a response is received from the ground then moving the coil off to one side away from the response and with the GB button depressed a Re-GB is achieved with a quick pump up and down of the coil close to the ground before moving back over response to verify a ground response from a target. This system of operating in Fxed GB  I would say is used the majority of the time when detecting with a GPX and a mono coil, especially using the timings that allow a mono coil to handle high mineralised ground and not having to rely on the Tracking GB setting that may miss a faint target response at depth.

The QED has been capable of handling high mineralised ground with a mono coil although its GB system is a bit more involved when encountering the same situation as above with a GPX. Therefore if BW can lesson the need.... to use its current Re-GB system by not having to decipher is the response a rising or dipping response and then having to raise or lower its GB numbers by 4 positions or so to verify a ground response from a target..... then that would appear to be a positive move in the QED’s ongoing development.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Thursday June 27 2019 21:55:18 AEST PM
come on IB lets see the coil in the field!


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: IBGold on Monday July 1 2019 16:11:18 AEST PM
  
come on IB lets see the coil in the field!

Hi Eski,
I am at present recovering from the Flu and I don't Video or film in the field I could probably dig up some photo's of the prototypes but they are my build not the commercial ones  all I can say at this time is the production prototypes are on their way to Australia to the Detech distributor where they will be tested before being passed onto me for my final testing if things work out with their permission I will post pictures.

Regards, Ian.


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: Eski on Wednesday July 3 2019 13:34:12 AEST PM
Oki Doki, hopefully they produce the numbers....  Does that mean it will be made (production ) by Detech?

so is Pete the only other tester? Maybe add Mick to the list , he will certainly put it through the paces


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: sd220d Digger on Monday July 15 2019 16:30:45 AEST PM
  
  
come on IB lets see the coil in the field!

Hi Eski,
I am at present recovering from the Flu and I don't Video or film in the field I could probably dig up some photo's of the prototypes but they are my build not the commercial ones  all I can say at this time is the production prototypes are on their way to Australia to the Detech distributor where they will be tested before being passed onto me for my final testing if things work out with their permission I will post pictures.

Regards, Ian.

G'day Ian.

Have you had a chance to get a hold of the production coils from Detech and what will they be called?




Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: IBGold on Tuesday July 16 2019 15:56:49 AEST PM
  
  
  
come on IB lets see the coil in the field!

Hi Eski,
I am at present recovering from the Flu and I don't Video or film in the field I could probably dig up some photo's of the prototypes but they are my build not the commercial ones  all I can say at this time is the production prototypes are on their way to Australia to the Detech distributor where they will be tested before being passed onto me for my final testing if things work out with their permission I will post pictures.

Regards, Ian.

G'day Ian.

Have you had a chance to get a hold of the production coils from Detech and what will they be called?


No I have yet to see the prototype but I have seen a picture they have used my coil wind type in a 10" round I believe not my capsule design but believe it will be on its way to me for testing when Pete has finished his testing so I will see what happens but I do have reservations if they do do my design I have asked for it to be called the Broadscan.

Regards, Ian. ::62::


Title: Re: A new thread for people wishing to publish and copyright ideas.
Post by: bugwhiskers on Friday July 19 2019 07:32:18 AEST AM
Copyright 19 July 2019

The latest advancement in the 2 short, 1 long TX GB method is as follows.
The 2 short TX have an incremental increase in TX length while the 1 long TX has a twice as long decrement in TX length.
Testing has shown the method highly effective in cancelling spurious ground noises (varying degrees of mineralisation),
slightly increased detection distance along with the GB detection hole being narrowed.
GB adjustment is achieved via very small (20nS) changes in the width of the short TX's.
Sample widths and phase (both long and short) remain constant providing very precise Earth Field cancellation.