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Fisher Impulse AQ Discrimination Explanation


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Steve, 

At Rye Patch, NV. across the road from the burn barrel, one of Gerry's guys buried a nickle 18" deep and all the GPX units with an 11" coil can detect the nickle. I doubt if any VLF could see that nickle!😂

Bill

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GPX is a high power PI. When you get yours working in 6 feet of saltwater let me know! 😂

I always thought it odd the worlds largest manufacturer of pulse inductions detectors has basically ignored the waterproof PI market. The floats like a cork SDC with its hardwired coil really does not count. I always wanted a GPX 5000 stripped to salt mode stuffed in a CTX 3030 housing. Then we would not be having this discussion. As it is the GPX is in a class of it's own so far and great for those who want to use one on the beach but not in the water. Frankly I don't want a GPX control box anywhere near saltwater for extended periods of time, but that's just me.

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18inches on a coin with a GPX I did not had these results it was rather 12/13 inches for me , this with the standard 11coil. But I did these tests a long time ago , 10 years ago and perhaps I should redo these tests. Also there is the GPZ that  seems to be more powerful than the GPX but its price is astronomic at 9000euros and no iron disc at all ...

Alexandre , yes it is not simple what you are doing , I thought that this was "just" electronics but it is more than this , so it takes times for the machines to be produced in an industrial way, this is normal. I am looking forward to see the AQ on the field during the coming weeks ....  

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PI detectors designed to run off 8 AA batteries are at a distinct disadvantage compared to high power pi detectors like the GPX. There is a reason for that brick sized Lithium Ion battery on a backpack. Here an ATX struggles to see an item at 18” the GPX sees with room to spare. And it is a die-hard Garrett dealer doing the test.

 

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  • 4 weeks later...

I have been attempting to offset unrealistic ideas about what the Impulse is capable of as far as discrimination by providing a more realistic and balanced perspective based on my many years of personal use of this technology. Time to bump this to the top with release imminent. Again. :smile:

fisher-impulse-aq-metal-detector-with-controls.jpg

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  • 1 year later...
On 24.12.2019. at 3:49, ALEXANDRE TARTAR said:

Здраво,

Ја сам инжењер физике у истраживачкој лабораторији Фисхер, дизајнирао сам Импулсе АК.

Ваша тема је конструктивна, па ћу пажљиво прочитати пост и сутра ћу покушати да одговорим на њега.

Ја сам Француз и треба ми мало времена да прочитам и одговорим ....  😉 

Алекандре

TDI 😄=AK Pulse I am Nikola Tesla  

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On 26.12.2019. at 19:02, ALEXANDRE TARTAR said:

Предговор: Због технолошке повјерљивости, очигледно је да нисам могао разговарати о одређеним техничким детаљима. Могу само да поделим своје знање на релативан начин како бих читаоцу пружио свеобухватно разумевање које је задовољавајуће. Зато ћу се бавити мало популарном науком оријентисаном на „ПИ“.

Сви детектори метала засновани на импулсном принципу математички зависе од 'експоненцијалног распада'. Ово експоненцијално распадање је вишеструко, то је низ експоненцијала који су угнежђени један у други (ефект земље + циљ + итд). Сваком експоненцијалном опадању одговара временска константа.

Свака мета има своју јединствену временску константу. Мислим на мету, прстење, златне грумене, ефекат земље ...

Величина циља је заиста проблем када се ово гледа први пут.

Али када се величина циљева уклони из једначине (да, то је лако изведиво), временске константе су хомогене и препознатљиве без заношења.

Аналогна анализа није довољна за решавање ове врсте проблема, дигитална обрада је неопходна.

Међутим, аналогна анализа се може знатно побољшати како би се испунила одређена очекивања истраживања без губитка превелике осетљивости. То је оно што се ради у ИМПУЛСЕ АК -у и никада раније није учињено.

ИМПУЛСЕ АК је један од првих модела у низу ПИ, ови будући модели ће бити све више и више врхунски. Овде не говорим о гадгетима, већ о технологији. Овај детектор ће, међутим, већ бити класификован међу врхунске производе на тржишту плавог чешљара. ИМПУЛСЕ АК има чисто аналогну анализу.

Иако је ова анализа аналогна, увелико се разликује од осталих модела.

Ова анализа је побољшана и надокнађује већину времена сталних проблема са идентификацијом златног накита.

ИМПУЛСЕ АК није бацач новчића, он је намењен само за откривање златног накита и то на свим врстама песка засићеним морском водом.

Иако неки новчићи или сребрни прстенови имају дуготрајне константе, неће сви бити одбијени у режиму "Муте". Али као што је горе поменуто, ово није пуцач на новчиће, па нам то није циљ.

Људи који желе да открију новчиће и предмете који нису златни могу на тржишту пронаћи мноштво детектора метала, примере Екуинок 800, ББС итд ...

Ови трагачи ће се тада суочити са трагачима који ће имати ИМПУЛСЕ АК и изгубит ће 20 до 30 цм на прстену од 2 гр у 18К злату у најбољем случају.

У најгорем случају, неће моћи чак ни да открију велики златни прстен на вулканском песку.

Ово је још једна од карактеристика ИМПУЛСЕ АК -а, овај модел је опремљен специфичним начином рада који омогућава откривање у вулканском песку засићеном морском водом са смањеним губитком осетљивости.

ИМПУЛСЕ АК се међутим не може користити за тражење златних грумена, за то су предвиђени други модели, осјетљивији су и не морају компензирати водљивост морске воде.

Ови системи су другачије дизајнирани ...

Не могу више рећи о различитим технологијама које се тренутно развијају.

ИМПУЛСЕ АК има следеће начине рада:

- СВИ МЕТАЛ

- ТОНЕ

- МУТЕ

- ВУЛКАНСКИ ПЕСАК

 Дискриминација аналогном анализом временских константи ИМПУЛСЕ АК -а омогућава му да скоро сав златни накит постави на "високу висину"

 Ево примера временске константе од најмање до највеће:

10к ->  14К ->  18К ->  22К ->  24К

0,3 гр -> 30 гр

Сав накит испод 22К, без обзира на тежину, биће откривен уз минималан губитак осетљивости (10%)

22К накит ће имати већи губитак осетљивости у зависности од њихове тежине (20%).

За 24К накит, неки ће се открити на ниским размерама у зависности од њихове тежине.

Али у свим околностима, осетљивост у режиму МУТЕ / ТОНЕ / или ВОЛЦАНИЦ САНД је изузетно супериорна у односу на све ВЛФ и ББС на тржишту. (од једноставног до двоструког)

У режиму АЛЛ МЕТАЛ, наравно, нема анализе временских константи, па нема губитка било које врсте.

Гвожђе се у потпуно металном режиму детектује карактеристичним двоструким звучним сигналом (под условом да је звук на граници детекције). Овај двоструки звучни сигнал је такође присутан у Тонски режиму.

ИМПУЛСЕ АК има многе друге предности које конкуренти немају.

Некада је на форумима речено да је немогуће спустити се испод 10µс кашњења пулса на песку засићеном морском водом. Ову цифру наравно треба узети лагано, јер није тешко дизајнирати ПИ са кратким кашњењем импулса, али је тешко дизајнирати је са јаком струјом завојнице!

ИМПУЛСЕ АК има снажну струју завојнице и сада је постављен на 7µс кашњења импулса, што му даје повећану осетљивост на све врсте накита.

На овом нивоу било је много посла на смањењу утицаја проводљивости соли, одржавању веома високе стабилности и малог кашњења пулса.

За све ове године истраживања, ИМПУЛСЕ АК је био огромна развојна платформа за моје будуће технологије, већ завршене за тржиште златних грумена.

Наставићу даље (данас сам болестан)🤣🤣

 

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On 5/30/2020 at 1:23 PM, Steve Herschbach said:

I have been attempting to offset unrealistic ideas about what the Impulse is capable of as far as discrimination by providing a more realistic and balanced perspective based on my many years of personal use of this technology. Time to bump this to the top with release imminent. Again. :smile:

fisher-impulse-aq-metal-detector-with-controls.jpg

 

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Things have been weird lately.  After a long time away from Metal Detecting I suddenly get real interested in collecting coins and have been buying some. So I think again about detecting as maybe I could find a few good ones this way.  Of course I gotta go to Prospecter/Detector to see what the latest greatest is.  Unfortunately I can't get on the website?  I'm thinking what happened? I try for a few days in a row to get on and I'm starting to wonder if somehow I had been banned or something from the website.  I did see something on Face book about Steve going to Alaska for a while but I never heard of him shutting the site down while he was away before.  I was so relieved when I got a message today about the site being down and now back up.  First thing I come across at the website is about the new Fisher Impulse AQ.  I start reading about it and watching a couple youtube videos and think this looks great!  I see there is a lot of discussion here about it over a year ago so I'm thinking this thing must be for sale by now.  I check and see none at Gerrys website and none for sale on ebay so I came back here and start reading up on this thread through all 14 pages where it kinda dies on May 14 2020. But then again that's about the time Covid started hitting hard so I suppose that could explain the delay?  

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