Outline

  • Abstract
  • Keywords
  • Introduction
  • Passive Standoff Detection Theory
  • Sensory Description
  • Icatsi Interferometer
  • Icatsi Detector Modules
  • Icatsi Fpa
  • Field Test Results
  • Conclusion

رئوس مطالب

  • خلاصه
  • کلیدواژه
  • مقدمه
  • نظریه آشکارسازی standoff غیر فعال
  • توصیف حسگر
  • ماژول ها (قطعات) آشکارساز iCATSI
  • نتایج حاصل از آزمایش میدانی
  • نتیجه گیری

Abstract

Uncontrolled releases of chemical pollutants represent a major threat for public health and security. Their detection, identification and release point localization constitute a real challenge to health, security and first responder’s communities. One promising detection method is based on imaging passive standoff detection and identification of chemical vapors. To investigate this method, Defense Research and Development Canada (DRDC) – Valcartier developed and tested passive Long Wave Infrared (LWIR) hyperspectral imaging (HSI) sensors for standoff detection. The initial effort was focused to address the standoff detection and identification of toxic industrial chemicals (TICs) and precursors. Sensors such as the Improved Compact ATmospheric Sounding Interferometer (iCATSI) were developed for this application. This paper describes the sensor developments and presents results of standoff detection and identification of chemical pollutants. The standoff sensor is based on differential Fourier Transform infrared (FTIR) radiometric technology and is able to detect, spectrally resolve and identify small plumes at kilometers ranges. Results from a series of field trials in several typical scenarios will be presented. These results will serve to establish the potential of the method for standoff detection of pollutants and surrogates.

Keywords: - - - -

Conclusions

his paper presents results obtained with newly developed hyperspectral imaging sensors.The analyses of the results have showed potential of these capabilities for the passive standoff detection, identification and monitoring of small-volume chemical pollutant industrial gas leaks. Development of high spectral sensitivity and high spatial resolution sensors is a key to providing new capabilities for health protection against industrial and accidental leaks.The modularity of iCATSI provides a good platform to test several kind of LWIR detector (upto 14 µm) with good sensitivity against several types of scenarios. The combination of imaging spectroradiometry with high data cube rate enables very fine temporal and spatial observations of gas cloud evolution. In this study, the detection, identification and monitoring of surrogates and evaporated solvents were demonstrated in a real type scenario at standoff distance of up to 500 meters. The industrial site measurement provides a good understanding of the capability to control air quality and monitor for environmental disasters. These results demonstrate that HSI sensors can reach the sensitivity required to detect and monitor small volume chemical leaks.

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