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Low-cost remote chemical sensing.

Holland, Stephen Keith.

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Low-cost remote chemical sensing.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Low-cost remote chemical sensing./
作者:	Holland, Stephen Keith.
面頁冊數:	133 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1934.
Contained By:	Dissertation Abstracts International65-04B.
標題:	Physics, Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3131442
ISBN:	0496786831

Low-cost remote chemical sensing.
Holland, Stephen Keith.

Low-cost remote chemical sensing. - 133 p.

Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1934.

Thesis (Ph.D.)--University of Virginia, 2004.

The intentional or accidental release of a hazardous chemical, such as a chemical warfare agent (CWA) or a toxic industrial chemical (TIC), could endanger many lives. In domestic chemical release situations, a rapid response, which is critical for casualty minimization, requires that primary and first responders have the ability to rapidly probe the threatened area from a safe distance. First responders require sensors that are portable, remote (stand-off), sensitive, robust, and cost effective. While a number of remote chemical sensors are being developed, none meet the requirements of the first responder community due to their cost, complexity, and size.

ISBN: 0496786831Subjects--Topical Terms:

1018756
Physics, Optics.

Low-cost remote chemical sensing.
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245 1 0 $a Low-cost remote chemical sensing.
300 $a 133 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1934.
500 $a Adviser: Gabriel Laufer.
502 $a Thesis (Ph.D.)--University of Virginia, 2004.
520 $a The intentional or accidental release of a hazardous chemical, such as a chemical warfare agent (CWA) or a toxic industrial chemical (TIC), could endanger many lives. In domestic chemical release situations, a rapid response, which is critical for casualty minimization, requires that primary and first responders have the ability to rapidly probe the threatened area from a safe distance. First responders require sensors that are portable, remote (stand-off), sensitive, robust, and cost effective. While a number of remote chemical sensors are being developed, none meet the requirements of the first responder community due to their cost, complexity, and size.
520 $a This work proposes a unique approach to hazardous chemical detection based on low-cost, low-energy, uncooled pyroelectric infrared detectors fitted with narrow bandpass filters. Prototype remote differential absorption radiometers (DARs) based on low-cost pyroelectric detectors fitted with relatively broad (30 cm-1) bandpass filters for sensitivity to hazardous chemical simulants, including methanol, dimethyl methylphosphonate (DMMP), and diisopropyl methylphosphonate (DIMP), were developed and tested. A methanol detection limit of 0.014 atm cm was demonstrated with the prototype sensor. This is well below military prescribed detection limits and demonstrates that sensors based on uncooled pyroelectric detectors can achieve sensitivities exceeding military requirements.
520 $a Once chemical sensitivity was demonstrated, a prototype multi-spectral sensor comprised of 8 pyroelectric detectors. The measured methanol detection limit for this sensor was 0.033 atm cm. This prototype exhibited a unique response to three hazardous chemical simulants which could be used to detect and to identify the chemical reliably. To improve chemical sensitivity in realistic sensing environments, correction for background effects, such as temperature variations and spectral emissivity characteristics, is required. A simple background correction algorithm is introduced and tested in field conditions. Although the algorithm was not optimized for all remote sensing applications, accurate background temperature and spectral emissivity estimates were obtained at the tested conditions. Further, sensitive and reliable chemical detection and identification were demonstrated in field conditions.
590 $a School code: 0246.
650 4 $a Physics, Optics. $3 1018756
650 4 $a Physics, Radiation. $3 1019212
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710 2 0 $a University of Virginia. $3 645578
773 0 $t Dissertation Abstracts International $g 65-04B.
790 1 0 $a Laufer, Gabriel, $e advisor
790 $a 0246
791 $a Ph.D.
792 $a 2004
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