Landmines Detection
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Landmines Detection

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It is graduate course seminar ppt.

It is graduate course seminar ppt.

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Landmines Detection Landmines Detection Presentation Transcript

  • LANDMINES DETECTION USING GROUND PENETRATING RADAR (GPR) By:- Kuldeep Singh Rao Final year , EICE A Seminar On
  • Outline
    • The problem of landmines
    • Current detection methods
    • Ground penetrating radar
    • Block diagram of GPR
    • Working of GPR
    • Drawbacks
    • Conclusion
  • The Problem : Land mines and UXO
    • There are nearly 50 million unexploded land mines in 60 countries around the world.
    • These land mines kill and maim approximately 26,000 people annually.
    • Large portions of land go unused
    • due to fear of mines.
    • United Nations relief operations are made more difficult and dangerous due to mining of roads.
    • Modern mines can be constructed with plastics and composites.
    • The low metal content of mines makes detection extremely difficult.
  • Current Detection Methods:
    • Metal detectors--- capable of finding even low-metal content mines in mineralized soils.
    • Nuclear magnetic resonance, fast neutron activation and thermal neutron activation.
    • Thermal imaging and electro-optical sensors detect evidence of buried objects.
    • Biological sensors such as dogs, pigs, bees and birds.
    • Chemical sensors such as thermal fluorescence--- detect airborne and waterborne presence of explosive vapors.
  • GPR : Ground penetrating radar
    • The impulse GPR system has been developed in the International Research Center for Telecommunications-transmission and Radar (IRCTR).
    • Ground Penetrating Radar (GPR) is an ultra wide band radar which provides centimeter resolution to locate even small targets.
    • There are two distinct types of GPR, time-domain and frequency domain.
    • Time domain or impulse GPR transmits discrete pulses of nanosecond duration and digitizes the returns at GHz sample rates.
    • Frequency domain GPR systems transmit single frequencies and the amplitude and phase of the return signal is measured. The resulting data is converted to the time domain.
    • These techniques allow GPR to locate even non metallic mines.
  • Block Diagram
  • Basic Components Impulse GPR system comprises of
    • Impulse generator
    • Transmitter
    • Receiver
    • Pulse extender
    • A/D converter
    • Processor
    • Visual display.
  • WORKING:
    • The impulse generator produces 0.8ns monocycle pulses.
    • The generator spectrum covers a wide frequency band from 500MHz till 2GHz on 3dB level.
    • Pulses are transmitted by the Tx antenna into the ground.
    • After striking the mine, pulses return and are received by the Rx antenna.
    • Pulse extender amplifies the ground reflection signal up to the maximum level acquired by A/D converter.
    • A/D converter converts the signal into digital signal.
    • Processor filters the signal and shows the presence or absence of surrogate mine in the soil.
    • Visual display helps to see the range of targets. It displays the exact position of landmine.
    • GPR images the dielectric properties of the soils, and any discontinuities appear as an error signal.
    • Thus false alarms are easily generated from the background itself .
    • To overcome the problem Automatic target recognition (ATR) algorithms are employed by impulse-based GPR systems typically calculate and remove background.
    DRAWBACKS
    • It tries to detect the hyperbolic signatures that are characteristic in size and shape of landmine targets in GEO-CENTERS 400.
    • The sensor such as GPR is larger and heavier.
    • GPR is more power hungry.
  • DEPLOYMENT PLATFORM T echnological development for land mine detection tends to be a vehicular based system. This vehicular based system is shown below
  • CONCLUSION
    • Impulse GPR system is used for detecting anti-tank and antipersonnel mines.
    • Through iterative design, build test cycles, and blind and scored testing at Army mine lanes, steady progress is being made.
  • Queries ?
  • THANK YOU