William1221
Member
WHAT DOES TDI MEAN IN THE WHITES NEW PI DETECTOR?
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Sorry tdi
- Thread starter William1221
- Start date
Eric Foster
New member
Seems like a lot of motorists are advertising the TDI. I passed quite a few cars on my way to work this morning, with TDI on their rear end.
Eric.
Eric.
Beachcomber
New member
Were they Volkswagons? Here in the States VW puts TDI on the back of thier Turbo Diesel Models 
HH
Beachcomber
HH
Beachcomber
Eric Foster
New member
Yes, VW's and a few other makes have TDI. (Turbocharged Direct Injection according to Wikipedia). I believe the other makes are owned by VW.
There are of course lots of TDI's - Tropical Disease Initiative - Texas Department of Insurance - Tolerable Daily Intake.
Eric
There are of course lots of TDI's - Tropical Disease Initiative - Texas Department of Insurance - Tolerable Daily Intake.
Eric
Hi there William !
Like the other guys who've replied to your query, I can only make a suggestion as to what TDI stands for..
How about [size=large]T[/size]ime [size=large]D[/size]omain [size=large]I[/size]ndication , Indicator , or Induction.....?????????
Regardless of the end result in how you evaluate the target's response by present pulse induction principles, it basically can be shown to be dependant on a Time Domain function.
The reciprocal of Time Domain Analysis is Fourier Analysis..................
A target which is either resistive, inductive or a combination of those characteristics, reflects its presence back to the coil, both during, and after the transmission of the energy pulse.
If you take several samples the coil's 're-actions' during the time period involved, you can determine if there are any 'external' influences modifying the normal cycle of 'charging' the coil with magnetic energy and the subsequent period of dissipation in the damping resistor involved in a mono-loop system.
External influences can be due to target materials, ground, water, or electro magnetic interference.
The design skill required, is to eliminate or minimise as efficiently as is practicable, all signals other than that due to the desired target.
The White's TDI unit may utilise Eric Foster's methodology for ground elimination and iron rejection.
Forum pictures of the White's TDI show a 'co-axial' or dual loop coil configuration.
So, instead of a 'direct' or dc coupling from the transmission coil to the detection circuitry, the introduction of a secondary loop allows an alternative and probably more sophisticated method of extraction the signal.
So I will have to wait for its introduction here into the UK to evaluate what it has to offer that differs from Eric's own units.
Be assured, if its made by Whites it will be worth waiting for.....MattR.UK.
Like the other guys who've replied to your query, I can only make a suggestion as to what TDI stands for..
How about [size=large]T[/size]ime [size=large]D[/size]omain [size=large]I[/size]ndication , Indicator , or Induction.....?????????
Regardless of the end result in how you evaluate the target's response by present pulse induction principles, it basically can be shown to be dependant on a Time Domain function.
The reciprocal of Time Domain Analysis is Fourier Analysis..................
A target which is either resistive, inductive or a combination of those characteristics, reflects its presence back to the coil, both during, and after the transmission of the energy pulse.
If you take several samples the coil's 're-actions' during the time period involved, you can determine if there are any 'external' influences modifying the normal cycle of 'charging' the coil with magnetic energy and the subsequent period of dissipation in the damping resistor involved in a mono-loop system.
External influences can be due to target materials, ground, water, or electro magnetic interference.
The design skill required, is to eliminate or minimise as efficiently as is practicable, all signals other than that due to the desired target.
The White's TDI unit may utilise Eric Foster's methodology for ground elimination and iron rejection.
Forum pictures of the White's TDI show a 'co-axial' or dual loop coil configuration.
So, instead of a 'direct' or dc coupling from the transmission coil to the detection circuitry, the introduction of a secondary loop allows an alternative and probably more sophisticated method of extraction the signal.
So I will have to wait for its introduction here into the UK to evaluate what it has to offer that differs from Eric's own units.
Be assured, if its made by Whites it will be worth waiting for.....MattR.UK.
Matt,
When do you reckon the TDI is gonna get to us here in blighty?
I have a goldscan 5 at the moment for beach work, am hoping that Eric's golden touch has been wrapped up in the Whites, more streamlined clothing, and gives as good a result as the GS5.
Seems to be a little difficult to get any solid info on the 'birth' of the TDI.
Many thanks
Darrin..........Cornwall
When do you reckon the TDI is gonna get to us here in blighty?
I have a goldscan 5 at the moment for beach work, am hoping that Eric's golden touch has been wrapped up in the Whites, more streamlined clothing, and gives as good a result as the GS5.
Seems to be a little difficult to get any solid info on the 'birth' of the TDI.
Many thanks
Darrin..........Cornwall
Hi Darrin..!
Hope this good weather we're enjoying up North, is being also shared with you down there in Cornwall.
Just the stuff to bring the crowds onto the beach, and lay a nice trail of goodies for you.
Regarding the TDI's entry into the UK.
Spoke to Whites in Inverness, earlier this week.
Sadly, they had no information as to when we can expect to have it available here in the UK.
I suspect that the detector will have to be subjected to EU regulatory examination and certification before release here.
So, we will have to be patient and hope that our friends in the USA who have one will tell us all about its functions etc.
It would be of great help if someone could publish a copy of the handbook, then we could at least anticipate what it has to offer.
My mate and I went out for a couple of hours this evening to one of our local beaches. We found a few targets, and detected until the sun set.
Thankfully, it turned chilly as the sun dipped, so we were left in peace from the usual inquisitive spectators.
Hope you have a good week end detecting..................MattRUK
.[attachment 94479 SunsetAtRedRocks2.jpg].
Hope this good weather we're enjoying up North, is being also shared with you down there in Cornwall.
Just the stuff to bring the crowds onto the beach, and lay a nice trail of goodies for you.
Regarding the TDI's entry into the UK.
Spoke to Whites in Inverness, earlier this week.
Sadly, they had no information as to when we can expect to have it available here in the UK.
I suspect that the detector will have to be subjected to EU regulatory examination and certification before release here.
So, we will have to be patient and hope that our friends in the USA who have one will tell us all about its functions etc.
It would be of great help if someone could publish a copy of the handbook, then we could at least anticipate what it has to offer.
My mate and I went out for a couple of hours this evening to one of our local beaches. We found a few targets, and detected until the sun set.
Thankfully, it turned chilly as the sun dipped, so we were left in peace from the usual inquisitive spectators.
Hope you have a good week end detecting..................MattRUK
.[attachment 94479 SunsetAtRedRocks2.jpg].
Thanks Matt,
As you say, it would be great to get the manual, and compare to the gs5.
As you are aware you can't get onto the forum without a serial number, which I find a bit short sighted on the part of Whites, let people see and read all there is, and get the tongues hanging out in anticipation
Darrin
As you say, it would be great to get the manual, and compare to the gs5.
As you are aware you can't get onto the forum without a serial number, which I find a bit short sighted on the part of Whites, let people see and read all there is, and get the tongues hanging out in anticipation
Darrin