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IMS Based Explosive Detector

IMS Based Explosive Detector. Abhinav Biswas , CSE , GET - 140811 Rahul Saxena , ECE , GET - 140935 Nishant Kumar Sharma, ECE , GET - 140921. Presented By:. Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad. What is IMS ?.

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IMS Based Explosive Detector

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  1. IMS Based Explosive Detector • AbhinavBiswas, CSE, GET - 140811 • RahulSaxena, ECE, GET - 140935 • Nishant Kumar Sharma, ECE, GET - 140921 Presented By: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  2. What is IMS ? • An analytical technique to identify gaseous Ionized molecules based on their Mobility or Drift velocity. Ion Mobility Spectrometry: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  3. What is IMS ? • Drift Tube Ion Mobility Spectrometry: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  4. Objective • Collect & Analyze drift tube output • Detect the sample material • Explosives like RDX, TNT. Data Acquisition & Display Unit : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  5. Pre-Amplifier Schematic Overview • Input Current • In picoamperes (pA) • Output Signal • In millivolts (mV) Drift Tube Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  6. Pre-Amplifier ADC Schematic Overview • Analog to Digital Conversion • THS1206 ADC by Texas Instruments • 12 bit, 6 MSPS • Conversion Clock • 100 kHz • Filters Drift Tube Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  7. Pre-Amplifier ADC ARM Schematic Overview • AT91SAM9263by Atmel • ARM9 Architecture • 32-bit RISC • 256 MB NAND Flash • 64 MB RAM • RS232 Serial Port Drift Tube Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  8. Pre-Amplifier ADC ARM LCD Schematic Overview • Touch Screen Display • 3’5” LCD • 320 X 240 Resolution • Resistive Touch Drift Tube Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  9. Data Analysis • ADC Output data • Containing Noise • Window Size – 50 • Moving Average Algorithm Using Matlab : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  10. Filter Requirement • Nyquist Criteria fs >= 2 * fm • Anti-Aliasing Low-Pass Filter Aliasing Problem: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  11. Filter Selection Narrow Transition Band Linear Phase Ripple ok No No No Low Order Butterworth Yes Yes Yes Other Filters High Order Butterworth FIR Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  12. Filter Design • Maximally flat pass-band response • Better rate of attenuation • Good all-around performance • Easy to implement Butterworth Filter: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  13. Filter Design Using LTC 1064-2 IC : • 8th order Butterworth filter (70-100kHz fc) • Variable Cut-off frequency – by changing clock Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  14. Filter Design Clock Generation : • 555 Timer IC • 50% Duty-cycle • Variable clock frequency – by changing Resistance value Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  15. Filter Design Using Sallen-Key Filter: • Why Sallen-Key Topology ? • 8th Order Butterworth Low-Pass Filter • Very high Q-Factor – 2.5 Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  16. Software • Porting Linux on the ARM board • U-Boot • Bootstrap • Kernel 2.6.30 • Root File System • Development of device drivers for ADC • IMS App using Qt 4.5 • Qwt library for Graphs • Cross-Compilation of Qt & Touch-screen libraries Operations: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  17. IMS App • Graph Plot of sample data • Peak Detection • Calculation of Drift Time How it works : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  18. Graph Plot • Moving Average Algorithm • Window Size – 50 samples Removal of Glitches : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  19. Graph Plot • Moving Average Algorithm • Window Size – 50 samples Removal of Glitches : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  20. Graph Plot • Step-by-Step Process • Window Size – 50 samples • Peak of each window Peak Detection : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  21. Graph Plot • Step-by-Step Process • Window Size – 50 samples • Peak of each window • Change of sign/slope Peak Detection : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  22. Conclusion • Analysis of ADC data • Filter design • Implementation in hardware • Development of IMS App • Moving Average algorithm • Peak detection algorithm • Final Deployment • Android version OngoingWork: FutureWork: Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

  23. Thank You ! Smt. Lakshmi Latha SM, CR&D ECIL Hyderabad Special Thanks to : Corporate Research and Development , CR&D Electronics Corporation Of India Limited, Hyderabad

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