Acoustic array beam-forming for standoff chemical detection

Gupta, Deepa; Wang, Chen-Chia; Khurgin, Jacob B.; Samuels, Alan C.; Trivedi, Sudhir; Choa, Fow-Sen

doi:10.1117/2.1201608.006636

Cited by 1 publication

(1 citation statement)

References 15 publications

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“…By means of the sound reflector, filters, and amplifiers, the standoff range can be extended up to 41 feet and 8 feet for IPA and TNT detection, respectively. Subsequently, the research group demonstrated a signal-enhancement and noise-reduction approach experimentally by means of acoustic beam-former technology with multiple microphone/reflector system, as well as with an array of multiple microphones and one reflector [144,145]. A standoff detection distance of 41 feet in an outdoor setting has been achieved for safely detecting chemicals, such as IPA, RDX, and TNT, with high signal sensitivity [146].…”

Section: Standoff Lpas With Microphonesmentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use.

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Section: Standoff Lpas With Microphonesmentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

View full text Add to dashboard Cite

show abstract

Acoustic array beam-forming for standoff chemical detection

Cited by 1 publication

References 15 publications

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

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