Accession Number : ADD009147

Title :   Constant Current Intruder Detection System.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Rittenbach, Otto E ; Olesch, Reinhard G

Report Date : 31 Aug 1981

Pagination or Media Count : 40

Abstract : An electronic detection system for detecting intruders employs a transmission line as a sensing element. In one embodiment the transmission line is a modified surface-wave transmission line, for example, a Goubau line, which is positioned about the perimeter of the area to be protected. An intruder in the field of the line causes an RF reflection back toward the source, which reflection may be detected by Doppler range-gating techniques. In other embodiments of the invention, the transmission line is an insulated, twisted wire pair or a deformable transmission line. In some instances, the transmission line may be replaced with an active or passive pressure line. (Author)

Descriptors :   *PATENT APPLICATIONS, *INTRUSION DETECTORS, *TRANSMISSION LINES, SURFACE WAVES, ELECTRIC WIRE, RADIOFREQUENCY, ELECTRONIC EQUIPMENT, REFLECTION, DETECTION, PERIMETERS(DEFENSE), WIRE, INVENTIONS, INTRUSION

Subject Categories : Magnetic & Electric Fld Detection & Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE