Featured Research

from universities, journals, and other organizations

Using Radio Waves To Find Contraband

Date:
October 31, 2001
Source:
Office Of Naval Research
Summary:
Explosives or narcotics concealed in luggage, mailboxes or on a person can’t hide from low frequency radio wave pulses which swiftly and safely detect the presence of the offending substance.

Explosives or narcotics concealed in luggage, mailboxes or on a person can’t hide from low frequency radio wave pulses which swiftly and safely detect the presence of the offending substance.

Related Articles


Based on technology developed by researchers at the Naval Research Laboratory (NRL) in Washington, D.C.,with support from the Federal Aviation Administration, the Technical Support Working Group of the Department of Defense, and Office of Naval Research, luggage detection equipment is being tested in airports in the U.S. under an NRL license to Quantum Magnetics, Inc., of San Diego, CA.

The technique used to zero in on explosives and narcotics is a process called nuclear quadrupole resonance (NQR). To find the target materials, low frequency radio wave pulses are emitted which momentarily disturbs the alignment of certain nuclei within the material. The pulsing causes the nuclei to realign and send out a unique weak radio signal. A sensor coil, patented by NRL, then hears this signal, which a computer analyzes to determine the presence and type of material found.

NQR is especially effective for land mine detection because today’s plastic-encased land mines have tiny metal firing mechanisms that require extremely sensitive metal detectors that also hone in on shell casings, nails and wire – leading to more false alarms than actual mines. With NQR, the explosives, the very essence of the mine, are being detected.


Story Source:

The above story is based on materials provided by Office Of Naval Research. Note: Materials may be edited for content and length.


Cite This Page:

Office Of Naval Research. "Using Radio Waves To Find Contraband." ScienceDaily. ScienceDaily, 31 October 2001. <www.sciencedaily.com/releases/2001/10/011030230254.htm>.
Office Of Naval Research. (2001, October 31). Using Radio Waves To Find Contraband. ScienceDaily. Retrieved December 21, 2014 from www.sciencedaily.com/releases/2001/10/011030230254.htm
Office Of Naval Research. "Using Radio Waves To Find Contraband." ScienceDaily. www.sciencedaily.com/releases/2001/10/011030230254.htm (accessed December 21, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Sunday, December 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Obama: Better Ways to Create Jobs Than Keystone Pipeline

Obama: Better Ways to Create Jobs Than Keystone Pipeline

AFP (Dec. 19, 2014) US President Barack Obama says that construction of the Keystone pipeline would have 'very little impact' on US gas prices and believes there are 'more direct ways' to create construction jobs. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins