Technicals questions to Mr FOSTER

[sandor]

hello I am the happy proprip

 

[rob5]

Eric, for more informations:
http://www.titanium-system.com/

 

[Prospector Al]

[quote sandor]hello I am the happy proprip

 

[sandor]

my question remains true a question and I make fun of the marks. I ask a technician (Mr. Foster) so technologically a P.I can have a discrimination and in this case how would it go? For a response

 

[Prospector Al]

Howdy,

Even if it were possible to design a PI detector that could differentiate between different targets, is it really worth the trouble? To compare the signals from a target with stored signatures, one must use a fast processor, and this , by necessity, means that one needs a heavy battery, like the GP 3000, with a gel cell in a back pack.

Else, one has to sweep the ground very slowly to obtain enough samples to make the analysis.

This is in fact not a simple problem to solve, and I'm not convinced that Adonis has done it.

Prospector Al.

To make sure nothing gets lost in translation, here's a version for Monsieur Sandor and other francophones. (I was astounded to find out that some of my previous comments in this Forum have been quoted on a French metal detector forum.)

Salut!

M

 

[sandor]

thank you for your explanations, however a point intrigues to me why did you say that with a processor the ultra fast consumption would be it increased as much? To finish the minelab gp discriminate according to you correctly or not?

 

[Prospector Al]

The power consumption of a microprocessor increases with frequency at a rate of ca. 10 mA per MHz. That's the reason for the fans directly mounted on the processor. In order to make the data retrieval and comparison with stored signatures during a sweep that lasts less than a second, a processor running at 100 MHz would be required. That corresponds to a continuous current drain of 1 A. (This is at a low voltage--not the battery voltage.)

That's the reason for the gel cell in the back pack.

The GP-3000 does discriminate, but only if the target is not buried to deep--for the targets at greater depth--the ones you'd really like to know about--the detector does not discriminate. The reason for this is that a reliable signature can be acquired only if the signal strength is well above the noise level and the signal is not distorted by minerals in the ground.

The term "discrimination" can be interpreted two ways: Discrimination against ferrous target and identification of non-ferrous targets.

For gold prospecting, the ferrous ID can be used to suppress the response of the detector altogether--in areas with a lot of junk that gives one's ear drums a break.

Identification of non-ferrous targets is a more difficult task. Many targets, like lead bullets, mimic gold nuggets pretty closely and relying on on discrimination in this case will mean many lost nuggets.

The Titanium people have spent a lot of effort creating publicity, but I haven't been able to find any feedback from unbiased users.

If you have any information, please send me a link...

Best,

Al

 

[rob5]

About the Mhz, faster microprocessor doesn't mean necessarily more performance, compare a Pentium M at 1.4 Ghz with a Pentium 4 at 2 Ghz, the Pentium M process faster than the P4 with less power consumption.

 

[Prospector Al]

You may be right, but the point I'm trying to make is this: Owing to their irregular shape and varying composition, gold nuggets exhibit time constants that vary all over the map. They may mimic nickels, pull tabs or lead bullets, etc. Using a processor to try to identify a nugget is a waste of time and any amount of current expended to operate the processor would be more fruitfully used for the coil pulse.

The only "discrimination" of use for a gold prospector is the differentiation between ferrous and non-ferrous targets--there are no ferrous nuggets...

I have measured the time constanst of nuggets from pennyweights to several ounces, and compared them to various non-ferrous junk targets--I'm not just theorizing about this.

 

[Poseidon]

Hello,

I am director of titanium System, if you have a questions you can write at alexandre.tartar@titanium-system.com
A new pictures on ours web site in the french parts, but not english part for the moment.

Cordially
Tartar Alexandre