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NCJ Number: 228120 Find in a Library
Title: Keeping Contraband on the Outside
Corporate Author: National Law Enforcement and Corrections Technology Center (NLECTC)
United States of America
Date Published: 2009
Page Count: 3
Sponsoring Agency: National Institute of Justice (NIJ)
Washington, DC 20531
National Law Enforcement and Corrections Technology Center (NLECTC)
Gaithersburg, MD 20879
Grant Number: 2005-MU-CX-K077
Sale Source: National Law Enforcement and Corrections Technology Center (NLECTC)
700 N. Frederick Ave.
Bldg. 181, Room 1L30
Gaithersburg, MD 20879
United States of America
Document: PDF
Type: Report (Technical)
Format: News/Media
Language: English
Country: United States of America
Annotation: This paper briefly describes seven types of electronic technologies available for correctional facilities to use at perimeter control points to detect any contraband on the person of staff, inmates, contractors, and visitors.
Abstract: RF (radio frequency) metal detectors project low-frequency radio waves. As a person passes through the portal, a radio signal is received and interpreted by software in determining whether the person is carrying a metallic object. Millimeter wave detection devices consist of high frequency radio waves interpreted by software in determining whether a potentially prohibited object is on a person’s body next to the skin. This technology detects all foreign substances on the human body, but it cannot detect objects within the body. Passive magnetic field metal detection senses and reports the earth’s natural magnetic field within the space of an opening and then measures the same space when a human is standing in the portal space. Interpretive software shows on a monitor the location of any foreign objects on the person‘s body. It does not detect contraband located in body cavities. Electric field tomography projects weak electrical energy into a person’s body. An interpretive software provides a graphic view as if the operator were looking through the person’s body. This technology can detect all objects on and within a human body. Ion scan technology is typically used to detect drugs and explosives. It detects the ion profile within an air sample associated with a person’s body, vehicle, or living space. Heartbeat detection uses geophone sensors combined with interpretive software to listen to vehicles parked in perimeter sally port enclosure for indications of a human heartbeat. Backscatter X-ray contraband detection uses high-energy, low-dose x-ray beams that pass over a human body. It does not penetrate the skin or detect objects inside body cavities.
Main Term(s): Technology transfer
Index Term(s): Corrections internal security; Metal detection; Metal detection devices; NIJ grant-related documents; Prison contraband
Note: Reprinted from the Summer 2009 edition of TechBeat; downloaded August 24, 2009.
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