gpr modeling landmine detection
TRANSCRIPT
-
8/4/2019 GPR modeling landmine detection
1/21
GPR Modeling-Landmine
Detection
Presented by,Arun VargheseS7 EC ARoll No.:22
-
8/4/2019 GPR modeling landmine detection
2/21
Objectives
Introduction
GPR
Hardware Description
The antenna model
Advantages
Conclusion
-
8/4/2019 GPR modeling landmine detection
3/21
INTRODUCTION
Landmines method of warfare
Landmines container of explosives thatare triggered by contact with a person orvehicles.
2 types anti-tank & anti-personal
-
8/4/2019 GPR modeling landmine detection
4/21
-
8/4/2019 GPR modeling landmine detection
5/21
Depth range of GPR is limited bythe electrical conductivity of the ground,the transmitted center frequency , the
radiated power.
-
8/4/2019 GPR modeling landmine detection
6/21
Hardware Description
-
8/4/2019 GPR modeling landmine detection
7/21
Impulse Generator
The pulse generator produces 0.8 nsmonocycle pulses.
Experimentally found that the 0.8nsmonocycle satisfies penetration andresolution requirements.
-
8/4/2019 GPR modeling landmine detection
8/21
Antenna System
The GPR Systems performance strongly
depends on the antenna system.
The antenna system consist of transmitterand receiver.
The transmit antenna should:
Radiate ultra-wide band (UWB).
Radiate electro magnetic energy.
-
8/4/2019 GPR modeling landmine detection
9/21
The Receiver antenna should:
High sensitivity in order to receive very weak
fields. Receive the field in a local point.
Be elevated at least 10cm above the groundsurface.
-
8/4/2019 GPR modeling landmine detection
10/21
Pulse Extender
Pulse extender will amplify the ground reflection.
A/D Converter
TXr RXr High speed sampler A/D converter.
-
8/4/2019 GPR modeling landmine detection
11/21
PROCESSOR
A/D converter Processor.
Processes the signal.
Presence or absence of surrogate mine.
Mine detecting signal Visual display.
-
8/4/2019 GPR modeling landmine detection
12/21
Visual Display
Range of targets. Exact position.
-
8/4/2019 GPR modeling landmine detection
13/21
Shows target at 55 cm and 100 cm.
Graph helps to calculate the distance from ground tomine.
-
8/4/2019 GPR modeling landmine detection
14/21
-
8/4/2019 GPR modeling landmine detection
15/21
THE ANTENNA MODEL
Represented by a simple source such as adipole or an infinite wire.
Consists of 2 identical bowtie antennasplaced side-by-side
disposition of the bowties inside theantenna unit crosstalk
-
8/4/2019 GPR modeling landmine detection
16/21
-
8/4/2019 GPR modeling landmine detection
17/21
-
8/4/2019 GPR modeling landmine detection
18/21
Advantages
Has accurate measurements.
Locates even small targets.
Biological sensors can only operate forlimited periods, but in GPR has no such limits
-
8/4/2019 GPR modeling landmine detection
19/21
Disadvantages
The sensor such as GPR is larger andheavier.
GPR is more power hungry.
GPR can be very effective or ineffective,depending on soil moisture
-
8/4/2019 GPR modeling landmine detection
20/21
CONCLUSION
GPR system can be used for detectinganti-tank and anti-personal mines.
Can used by military agents for effective
demining
-
8/4/2019 GPR modeling landmine detection
21/21
THANK YOU