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Nail Board Test

Discussion in 'Metallica' started by SuchMuch, Dec 23, 2016.

  1. SuchMuch

    SuchMuch Detectorist

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    ***qte***
    One of the well known misleads regarding hunting on trashy site is a type of tests "nail-coin-nail". Such type of tests means experiments performed on a flat surface with targets in different positions, it's a 2D model. But trashy site has an additional dimension in real life: vertical. Testing metal detectors in 2D model is able only to reveal how fast detectors are. 2D model cannot represent polluted with iron site where people lived for a long period of time. Such sites are infested with iron at different depths as well and it's a 3D model: coin could be laying under, between or above iron objects at the same time. And this is completely different environment metal detector is to operate in and 2D tests as well as so-called "nail board test" cannot even approach to such imitation.
    For instance, it's real when metal detector cannot hit the coin laying on surface and being observed by detectorist due to massive amount of iron laying under the coin. The another example is middle size nail laying close or above the coin that masks coin signal completely for majority of ultra fast modern metal detectors if detectorist swings into direction of nail length.
    ***unqte***

    Lvovich:
    ***qte***
    It's good when electronics of metal detector is ultra fast, but it's just a part, small part of solution of trashy hunting task.;)
    ....
    Right coil is responsible for 80% of success on trashy site.
    ***unqte***
     
  2. tnsharpshooter

    tnsharpshooter AKA Novice

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  3. SuchMuch

    SuchMuch Detectorist

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  4. mschmahl

    mschmahl "AKA Deutschland" Group Moderator Staff Member

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  5. nigel westwood

    nigel westwood Iron Lord

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  6. SuchMuch

    SuchMuch Detectorist

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