NCJ Number
137474
Journal
Security Management Dated: (June 1992 Supplement) Pages: 31A-32A,35A,37A-38A
Date Published
1992
Length
5 pages
Annotation
From an operational perspective, securing the outdoor perimeter of complicated environments such as land and air transportation sites near distribution facilities and airports poses many obstacles to the accurate detection and assessment of security breaches; this article identifies the security challenges presented by such sites and describes the alternatives that can make the job more manageable.
Abstract
The security system selected for these sites must have a proven high probability-of-detection rate and be cost-effective. The technology used must not interfere with vehicle movement, must be adaptable to a wide range of site sizes and configurations, and must be covert and unobtrusive. For many sites, these criteria have been met by a buried-line sensor system that consists of two parallel sensor cables buried around or across the secured area and connected to an electronics unit that generates a radio-frequency signal. When an object with a large conductive cross section or mass (humans or metallic objects) enters the field, the signal is changed and an alarm is generated. This design has given buried-line sensor systems a flexibility and adaptability that makes them effective for sites where land and air transportation vehicles must be protected from vandalism and theft, whether they are parked in remote locations or adjacent to distribution centers.