Magnet Fragment Collector
Development responsibility: UWA
Origin of concept
Test model 1
Demonstration prototype
We used a set of four pairs of ferrite permanent magnets, side by side,
enclosed within a stainless steel sheath running over the ground on two
wooden skids. The magnets were arranged as follows to maximise local field
gradients:
The sheath makes it easier to brush off pieces of metal after they have
been attracted to the magnet. The device sits about 50mm above the ground
surface.
Simulated field demonstrations
We tested this device at Toodyay in December 1996. We showed that it
could attract surface fragments, and sub-surface fragments in loose earth
to a depth of about 5 cm.
We scattered a large number of small steel fragments over an area of
hard ground, and then collected all of them with the magnet at a rate of
about 0.5 sq m per second. We also collected magnetic stones (the ground
in Toodyay is highly mineralized with iron which makes it an ideal site
for demanding metal detector testing). After clearing the ground, the performance
of the Quantum 2020 metal detector was enhanced because the magnetic stones
caused noticeable background noise. (An improved model of the detector (2020A)
is now available with more immunity to this effect.)
magnet/magnet-electro-1-s.jpg
Status (July 1997)
Device has been retained for demonstration purposes.
Minefield sweeper (concept)
We devised a machine (see sketch) for clearing along the edges of a minefield.
This may be particularly useful for roads where AP mines have been laid
along the verges. Initial road clearance may be restricted to AT mines in
the road pavement, but the shoulders and verges may still be mined. |
magnet/magnet-clearance-1-s.jpg
magnet/magnet-clearance-2-s.jpg |
Heavy duty electromagnet (concept)
This was a variation to the concept of the minefield sweeper.
magnet/magnet-electro-2-s.jpg
We would welcome collaborators to work
on related devices.
We will supply you with reports and working drawings, papers etc., provided
you agree to joint publications arising from this.
Contact
us
| Demining Home Page | James Trevelyan's Home Page
| UWA Home page |
For
more information on any of these send us E-mail at demining@mech.uwa.edu.au
All graphics by Demining Research
Team. Aug 1998.
Webmaster: Edin Tabak
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