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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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bugwhiskers
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« on: Saturday June 8 2019 17:44:46 AEST PM »

A slight but important change to the QED TX/Demodulation/GB method.


* DISCLOSURE3.BMP (120.83 KB, 1356x719 - viewed 311 times.)
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« Reply #1 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 smile
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« Reply #2 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.
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« Reply #3 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.
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« Reply #4 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
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bugwhiskers
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« Reply #5 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.
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« Reply #6 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.
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« Reply #7 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.
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« Reply #8 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. happy face
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bugwhiskers
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« Reply #9 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. happy face
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.
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« Reply #10 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 smile
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« Reply #11 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 smile

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.
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« Reply #12 on: Monday June 10 2019 14:22:43 AEST PM »

thanks for the info bugs  happy face
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« Reply #13 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 smile

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
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« Reply #14 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 smile

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 smile
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« Reply #15 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 smile

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 smile
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« Reply #16 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 smile

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 smile

Once the testers reports come in I will collate and post them.
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« Reply #17 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.
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« Reply #18 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.
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bugwhiskers
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« Reply #19 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.
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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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