Mine Detection Systems - GPR and LLMD
Ground Penetrating Radar (GPR)
Ground Penetrating Radar (GPR) is used in areas
where there are suspected landmines and unexploded ordnance
(UXO). The use of GPR is best suited in areas such as
deserts or where the vegetation is sparse.
The GPR is a geophysical method of survey that is
useful in locating buried objects. One benefit of using GPR
is that it does not disturb the ground and can be very cost
effective. This non-destructive survey technique produces a
continuous cross-sectional profile of what lies underground
to record subsurface anomalies without digging, probing or
drilling which helps to improve safety standards for
demining teams.
Operating the GPR is analogous to taking an x-ray of
the ground. The GPR operates by transmitting bursts of high
frequency electromagnetic energy through an antenna into
the ground. The instrument is then able to detect
discrepancies in the ground, which can be cavities,
variations between rock and soil or buried objects. The
antenna receives the reflected waves and stores them in a
digital unit. This is a similar technique to sonar or
seismic reflections.
MineTech has facilitated the development of the GPR
for locating and identifying landmines and UXO in order to
enhance its existing resources.
   Large Loop Metal Detector (LLMD)
The Large Loop Metal Detector (LLMD) is used where
there are suspected landmines and unexploded ordnance (UXO).
The LLMD is attached to the front of a MDV. The LLMD is calibrated
to the minimum target required, before commencing operations. The
system can be calibrated to ignore metallic items of less than
500 grams as required. In addition to this, metallic items over
500 grams can be detected up to 60 centimetres while anti-tank mines
can be detected to a depth of up to 130 centimetres. LLMD can cover
a large area and does not detect as much scrap metal as traditional
detectors which means clearance can proceed more quickly.
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