At the request of Eric Foster we have renamed the long running Pulse Induction Classroom the PI Technology Forum since Eric wanted to combine his efforts elsewhere into one package. Eric is probably the foremost authority on PI metal detectors in the world. We hope you enjoy the forum and get the necessary technical information you need.http://www.findmall.com/list.php?34Fri, 20 Nov 2009 16:41:52 -0600 Phorum 5.2-dev http://www.findmall.com/read.php?34,1093115,1093115#msg-1093115 http://www.findmall.com/read.php?34,1093115,1093115#msg-1093115On Youtube there was a chap with a Whites TDI, ground balancing out nails and digging all high conductors. Something I had tried with my Fisher Gold Bug 1 many moons before for beach jewelry hunting.






PennyFinder]]> PennyFinder PI Technology ForumThu, 19 Nov 2009 07:53:13 -0600 http://www.findmall.com/read.php?34,1089286,1089286#msg-1089286 http://www.findmall.com/read.php?34,1089286,1089286#msg-1089286(This message does not contain any text.)
]]> El PI Technology ForumThu, 12 Nov 2009 11:05:12 -0600 http://www.findmall.com/read.php?34,1088743,1088743#msg-1088743 http://www.findmall.com/read.php?34,1088743,1088743#msg-1088743 aceauman PI Technology ForumThu, 12 Nov 2009 07:06:14 -0600 http://www.findmall.com/read.php?34,1087265,1087265#msg-1087265 http://www.findmall.com/read.php?34,1087265,1087265#msg-1087265
Theres one I could buy - and if I could use it now for the beach and later (with DD) for gold nuggets, I might bite.]]> lytle78 PI Technology ForumMon, 09 Nov 2009 22:11:46 -0600 http://www.findmall.com/read.php?34,1082602,1082602#msg-1082602 http://www.findmall.com/read.php?34,1082602,1082602#msg-1082602 Rich in Rocky PI Technology ForumThu, 12 Nov 2009 17:52:59 -0600 http://www.findmall.com/read.php?34,1081747,1081747#msg-1081747 http://www.findmall.com/read.php?34,1081747,1081747#msg-1081747Rafael]]> rgalan2003 PI Technology ForumFri, 30 Oct 2009 17:25:11 -0500 http://www.findmall.com/read.php?34,1080889,1080889#msg-1080889 http://www.findmall.com/read.php?34,1080889,1080889#msg-1080889Take r,
Ale]]> akille68 PI Technology ForumSat, 31 Oct 2009 22:58:15 -0500 http://www.findmall.com/read.php?34,1076691,1076691#msg-1076691 http://www.findmall.com/read.php?34,1076691,1076691#msg-1076691 Jim Robertson PI Technology ForumFri, 23 Oct 2009 08:42:55 -0500 http://www.findmall.com/read.php?34,1073477,1073477#msg-1073477 http://www.findmall.com/read.php?34,1073477,1073477#msg-1073477
The detectors can be seen here: http://www.secon-usa.com/water.html

regards, Tom
www.wreckoverysalvage.com]]> mad4wrecks PI Technology ForumSat, 17 Oct 2009 22:04:19 -0500 http://www.findmall.com/read.php?34,1073313,1073313#msg-1073313 http://www.findmall.com/read.php?34,1073313,1073313#msg-1073313The seller claims it is an early Eric Foster unit, but there isn't anything to ID it.
I am posting the Ebay Item number, 170392118908.
I appreciate any help possible
Cesar]]> port1972 PI Technology ForumTue, 20 Oct 2009 15:25:53 -0500 http://www.findmall.com/read.php?34,1072807,1072807#msg-1072807 http://www.findmall.com/read.php?34,1072807,1072807#msg-1072807 John-Edmonton PI Technology ForumSun, 01 Nov 2009 00:59:43 -0500 http://www.findmall.com/read.php?34,1058222,1058222#msg-1058222 http://www.findmall.com/read.php?34,1058222,1058222#msg-1058222 cabochris PI Technology ForumSun, 04 Oct 2009 18:48:40 -0500 http://www.findmall.com/read.php?34,1054797,1054797#msg-1054797 http://www.findmall.com/read.php?34,1054797,1054797#msg-1054797I'd like to know if this cheap P.I. has some sort of iron recognition, I mean if, with hard and long work, You could understand sounds and so on (iron=double beep).
All the best,
Ale]]> akille68 PI Technology ForumSat, 03 Oct 2009 17:39:57 -0500 http://www.findmall.com/read.php?34,1053230,1053230#msg-1053230 http://www.findmall.com/read.php?34,1053230,1053230#msg-1053230(This message does not contain any text.)
]]> Hastings PI Technology ForumMon, 28 Sep 2009 11:57:18 -0500 http://www.findmall.com/read.php?34,1052625,1052625#msg-1052625 http://www.findmall.com/read.php?34,1052625,1052625#msg-1052625
Im going to africa to treasure hunt, so I need a PI metal detector that can go deep, can anyone advice me on these brands :

DETECH SS3100
NOTSI MOLE

whats the difference between those PI and the TDI from white and other PI like Inf from Garett.


here is a compleet list of the product in questions

http://www.radardesol.com/aide.htm

thanks]]> deeptaughts PI Technology ForumWed, 23 Sep 2009 07:32:33 -0500 http://www.findmall.com/read.php?34,1050663,1050663#msg-1050663 http://www.findmall.com/read.php?34,1050663,1050663#msg-1050663http://www.faqs.org/patents/app/20090045813


The discrimination technique looks very interesting.

HH

Frank]]> FrankMD PI Technology ForumWed, 07 Oct 2009 03:42:08 -0500 http://www.findmall.com/read.php?34,1049922,1049922#msg-1049922 http://www.findmall.com/read.php?34,1049922,1049922#msg-1049922(This message does not contain any text.)
]]> Hastings PI Technology ForumTue, 15 Sep 2009 15:15:10 -0500 http://www.findmall.com/read.php?34,1048932,1048932#msg-1048932 http://www.findmall.com/read.php?34,1048932,1048932#msg-1048932cjc [clivesgoldpagehome]]]> cjc PI Technology ForumSun, 13 Sep 2009 12:07:49 -0500 http://www.findmall.com/read.php?34,1045879,1045879#msg-1045879 http://www.findmall.com/read.php?34,1045879,1045879#msg-1045879 Detectorguru PI Technology ForumThu, 15 Oct 2009 18:18:51 -0500 http://www.findmall.com/read.php?34,1043759,1043759#msg-1043759 http://www.findmall.com/read.php?34,1043759,1043759#msg-1043759 Wet and Dry PI Technology ForumSun, 13 Sep 2009 16:34:56 -0500 http://www.findmall.com/read.php?34,1041745,1041745#msg-1041745 http://www.findmall.com/read.php?34,1041745,1041745#msg-1041745
There are some scope shots at geotech1.com at DPS5000

... below is a functional block of the DPS5000 ... one of the tricky bits I have been pondering is how to process up to thousands of data points in a single sample ( each data value is a complex variable ie Amplitude and Phase ) and each can be processed as an elementary metal detector. This equates to thousands of parallel descrimination points.
The question is how to produce one output signal that indicates a good target or not.

After some preliminary testing of code on the back end ( where the Phase and Amplitude is pumped out of the processing engine ) I believe I have found an answer .....

A neural network .... using the same principle as the meatware on your shoulders ... a neural network can not only process thousands of parallel data inputs at the same time but it can also adapt ( or learn ) .... This would mean that from the thousands of amplitude / phase inputs to the NN there would be say several outputs ranging from ( for example ) dig, dont dig, hotrock, ferrite, dont know, run away etc.

Additionally the user could 'train' the detection system to recognise new 'unknown' targets if they are worth digging ( like coins ) or avoiding (like landmines )

Historically neural networks have very high performance for pattern recognition and the ability to 'lift' a wanted pattern from high levels of interferance ( eg ground clutter ). Most NNs can achieve hit ratios above 90% in this type of application .. ( ie pattern recognition ).


[attachment 137668 DPS5000_functional.jpg]]]> moodz PI Technology ForumWed, 11 Nov 2009 06:53:39 -0600 http://www.findmall.com/read.php?34,1035382,1035382#msg-1035382 http://www.findmall.com/read.php?34,1035382,1035382#msg-1035382 sand turner PI Technology ForumTue, 25 Aug 2009 04:17:52 -0500 http://www.findmall.com/read.php?34,1032447,1032447#msg-1032447 http://www.findmall.com/read.php?34,1032447,1032447#msg-1032447
Have anyone of you tried using a DD coil on the TDI and got the same result?]]> AlexP PI Technology ForumThu, 27 Aug 2009 15:46:48 -0500 http://www.findmall.com/read.php?34,1030276,1030276#msg-1030276 http://www.findmall.com/read.php?34,1030276,1030276#msg-1030276
I'm interested in measuring soil magnetic viscosity using a pulse induction meter. I suppose most detector manufacturers consider this undesirable but are there any commercial units available that could do this? The technique was popular for archaeology some years ago but seems to have fallen out of favour. Is anybody able to describe how PI could do this and if a basic PI metal detector circuit could be adapted to measure viscosity?

Geophys]]> Geophys PI Technology ForumTue, 18 Aug 2009 06:40:25 -0500 http://www.findmall.com/read.php?34,1029619,1029619#msg-1029619 http://www.findmall.com/read.php?34,1029619,1029619#msg-1029619Please feedback welcome. Pros's, Con's, indifference's. I thought I had decided on the Whites until my Excal initial repair cost started me thinking on the Tesoro lifetime warranty. I am kinda fond of the Tesoro's, owned a Lobo ST and a Tejon. Loved them both. This will be my first PI and would like to hear from all.

Thanks, Kevin]]> S.TexasKevin PI Technology ForumThu, 27 Aug 2009 15:48:57 -0500 http://www.findmall.com/read.php?34,1029356,1029356#msg-1029356 http://www.findmall.com/read.php?34,1029356,1029356#msg-1029356
I am now in Ireland for a break with our son Eddie and his family. Problem is that I fell on the first day and dislocated my left shoulder. More hospital visits to set it, but it is OK now except I mustn't use it for a few weeks.

Eric.]]> Eric Foster PI Technology ForumWed, 19 Aug 2009 02:28:11 -0500 http://www.findmall.com/read.php?34,1028421,1028421#msg-1028421 http://www.findmall.com/read.php?34,1028421,1028421#msg-1028421 Sandmagnet PI Technology ForumFri, 14 Aug 2009 15:46:36 -0500 http://www.findmall.com/read.php?34,1027679,1027679#msg-1027679 http://www.findmall.com/read.php?34,1027679,1027679#msg-1027679
I have used an Auto-Pulse 1 since 1976 and I would like to know if it is possible to add a coil of say 1m diameter (homebrew) in order to locate a buried aircraft at maybe 1m + depth. Will the circuit drive a large coil? Is it possible to get hold of a circuit diagram?

Many thanks

Geophys]]> Geophys PI Technology ForumSat, 15 Aug 2009 04:28:47 -0500 http://www.findmall.com/read.php?34,1027659,1027659#msg-1027659 http://www.findmall.com/read.php?34,1027659,1027659#msg-1027659
I was looking at the Detector Pro website and I see that they advertise the Pirate and Pirate Pro as also a land machine and it has disc.

Does anyone have an opinion on using these detectors for relics like I mentioned above? Will it work as well as the Infinium or the TDI ?

Thanks in advance!

Julien]]> jbow PI Technology ForumSun, 08 Nov 2009 06:26:47 -0600 http://www.findmall.com/read.php?34,1027534,1027534#msg-1027534 http://www.findmall.com/read.php?34,1027534,1027534#msg-1027534(This message does not contain any text.)
]]> Johny uma PI Technology ForumWed, 12 Aug 2009 11:00:37 -0500