Detection and identification of substance (explosive, drugs) using the dynamics of spectral lines distorted by influence of ambient medium

Vyacheslav A. Trofimov; Nikolay V. Peskov

doi:10.1117/12.923170

15 October 2012 Detection and identification of substance (explosive, drugs) using the dynamics of spectral lines distorted by influence of ambient medium

Vyacheslav A. Trofimov, Nikolay V. Peskov

Author Affiliations +

Proceedings Volume 8496, Terahertz Emitters, Receivers, and Applications III; 84960W (2012) https://doi.org/10.1117/12.923170
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Some of the modern problems arising in the detection and identification of substances are an influence of water vapor and opaque coverings and surface of the explosive and an influence of ambient medium (for example, atmospheric gases) on the THz signal reflected from the sample. All influencing factors mentioned above distort the signal and its spectrum. Therefore, we get the signal with information about the ambient medium and coverings. We show in this paper that the method of the spectral dynamics analysis (SDA-method) is convenient tool for the detection and identification of the explosive and drugs at such conditions. For this aim we develop the method which allows us to get the dynamics of spectral lines of the explosive response distorted by action of various causes. We compare the new method of finding the spectral lines dynamics with previous method based on FTST (Fourier-Gabor transform). It is essential that we analyze the THz pulse with a few cycles. As consequence, this pulse has a broad spectrum. To remove the action of opaque coverings it is sufficient to analyze the sub-pulse which follows after reflected main pulse. To avoid an influence of water vapor it is sufficient to use the transparent windows of atmosphere. We show the possibility to get the dynamics of spectral lines without its distortion by neighboring frequencies under certain choice of both the order of measurements and time window for the computer processing of the signal reflected from the sample. Analysis of the spectral line dynamics allows us to avoid the influence of surface of the explosive on the detection and identification of forbidden substance as we believe. This problem requires additional investigations. Nevertheless, the preliminary results of investigations show the validity of such approach to get true way.

Citation Download Citation

Vyacheslav A. Trofimov and Nikolay V. Peskov "Detection and identification of substance (explosive, drugs) using the dynamics of spectral lines distorted by influence of ambient medium", Proc. SPIE 8496, Terahertz Emitters, Receivers, and Applications III, 84960W (15 October 2012); https://doi.org/10.1117/12.923170

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
16 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Terahertz radiation

Picosecond phenomena

Explosives

Ceramics

Opacity

Absorption

Specular reflections

Show All Keywords

Keywords/Phrases

Search In:

Publication Years