Applications of swept-frequency acoustic interferometer for nonintrusive detection and identification of chemical warfare compounds

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Description

Swept-Frequency Acoustic Interferometry (SFAI) is a nonintrusive liquid characterization technique developed specifically for detecting and identifying chemical warfare (CW) compounds inside sealed munitions. The SFAI technique can rapidly (less than 20 seconds) and accurately determine sound speed and sound attenuation of a liquid inside a container over a wide frequency range (1 kHz-15 MHz). From the frequency-dependent sound attenuation measurement, liquid density is determined. These three physical properties are used to uniquely identify the CW compounds. In addition, various chemical relaxation processes in liquids and particle size distribution in emulsions can also be determined from the frequency-dependent attenuation measurement. The ... continued below

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9 p.

Creation Information

Sinha, D. N.; Springer, K.; Han, W.; Lizon, D. & Kogan, S. December 1997.

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Description

Swept-Frequency Acoustic Interferometry (SFAI) is a nonintrusive liquid characterization technique developed specifically for detecting and identifying chemical warfare (CW) compounds inside sealed munitions. The SFAI technique can rapidly (less than 20 seconds) and accurately determine sound speed and sound attenuation of a liquid inside a container over a wide frequency range (1 kHz-15 MHz). From the frequency-dependent sound attenuation measurement, liquid density is determined. These three physical properties are used to uniquely identify the CW compounds. In addition, various chemical relaxation processes in liquids and particle size distribution in emulsions can also be determined from the frequency-dependent attenuation measurement. The SFAI instrument is battery-operated and highly portable (< 6 lb.). The instrument has many potential application in industry ranging from sensitive detection (ppm level) of contamination to process control. The theory of the technique will be described and examples of several chemical industry applications will be presented.

Physical Description

9 p.

Notes

OSTI as DE98001326

Source

  • 214. American Chemical Society meeting, Las Vegas, NV (United States), 7-13 Sep 1997

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  • Other: DE98001326
  • Report No.: LA-UR--97-3113
  • Report No.: CONF-970962--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/555542 | External Link
  • Office of Scientific & Technical Information Report Number: 555542
  • Archival Resource Key: ark:/67531/metadc689909

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 18, 2015, 6:29 p.m.

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Sinha, D. N.; Springer, K.; Han, W.; Lizon, D. & Kogan, S. Applications of swept-frequency acoustic interferometer for nonintrusive detection and identification of chemical warfare compounds, report, December 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc689909/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.