10-10-2012, 12:42 PM
TERRORISM PREVENTION USING EMBEDDED SYSTEMS
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ABSTRACT:
What is the major weapon of terrosists?it is explosives.an explosive can be taken even in a small bottle and can be effectively used for killing thousands within few seconds.Explosives are of two kinds namely
Metal explosives :detected by metal detectors
Liquid explosives: no efficient detecting system
So we developed a strategy that would not only detect liquid explosives but also for catching the terrorist red handedly. By our wide research over the web we found out that the 99% OF TERRORISTS used very few amounts of higly destructive liquid explosives like glyceryl trinitrate,ammonium nitrate etc.Nitroglycerin (glyceryl trinitrate famously known as GTN)is the most convenient and the frequently used liquid explosive. This basically has a –NO2 bond,-CH bond and –CO bond that are supposed to give characteristic spectra when subjected to UV spectrometer. Thus we have a UV spectrometer that tests the component and gives gives its absorption spectra. The output is fed to a Band Pass Filter. A band pass filter filters the required frequency range and rejects others and sends it to a frequency to analog converter,which coverts the frequency signal to voltage or current signal and sends to A/D converter,which converts analog to digital signals
ADC from-MS1210:
An ADC receives Analog signals from the Bandpass filter and converts them into digital form .The Bandpass filters provide the ADC with the selected regions(1100-1300mm-1,9240-9520mm-1,1750-1000m-1)of the characteristic spectra of the substance. That input is converted into digital form. We have selected the ADC component from the microcontroller MS1210.It has very good features.
Computerized Data Acquisition System:
Data acquisition systems, as the name implies, are computer processes used to collect information to document or analyze some phenomenon. Here the digital information received from the A/D converter is accepted as input for a code written in “PYTHON” language .
And use a software to ultimately detect a liquid explosive. Following is a basic flowchart that will explain the proceedings:
DIGITAL SPECTRUM ANALYZER:
The output of the A/D converter can also be given to software called zelscope,which is digital spectrum analyzer. A spectrum analyzer is a device used to examine the spectral composition of the uv absorption spectrum of various components.
KEY:ZELSCOPE gets the digital data from A/D CONVERTER and converts it into image format(.bmp or .emf)
CONCLUSION:
Thus we can conclude that, with the applications discussed above man is able to do new things. These products of embedded engineering are really making an uneducated man feel if it is a God's magic in man's Paradise and these embedded systems has taken the world into a new era.