Showing papers on "Intrusion detection system published in 1978"
Patent•
30 May 1978
TL;DR: In this paper, a multiple zone intrusion detection system (MIDS) is proposed, in which a plurality of intrusion sensors can be readily converted into the system without system modification, and in which mode control signals from a central control unit and alarm signals from the sensors are both conveyed on a single conductor of the system cable.
Abstract: A multiple zone intrusion detection system in which a plurality of intrusion sensors can be readily converted into the system without system modification, and in which mode control signals from a central control unit and alarm signals from the sensors are both conveyed on a single conductor of the system cable. Each sensor has an associated interface module which permits coupling of different types of sensors to the system and sharing of a single conductor for mode control signals and alarm signals.
20 citations
Patent•
23 Aug 1978
TL;DR: An intrusion detection system utilizes a radio frequency radiative system whose near electromagnetic field is monitored by receiving devices which respond, in a measurable way, to any disturbance of the near-emerald field by physical intrusion as discussed by the authors.
Abstract: An intrusion detection system utilizes a radio frequency radiative system whose near electromagnetic field is monitored by receiving devices which respond, in a measurable way, to any disturbance of the near electromagnetic field by physical intrusion.
12 citations
Patent•
23 Mar 1978
TL;DR: In this paper, an intrusion detection system can be armed and disarmed from a plurality of remote locations by the use of momentary switches, each one associated with one of said locations.
Abstract: An intrusion detection system can be armed and disarmed from a plurality of remote locations by the use of a plurality of momentary switches, each one associated with one of said locations. Each switch when depressed, functions to change the state of a flip/flop. The flip/flop in one mode operates to disarm the intrusion detection system. When the flip/flop is in its other mode, the intrusion detection system is armed and activated. The apparatus monitors the state of the control loop associated with the detection system in order to indicate to a user that the system can be activated or armed when desired. If the control loop is not secure, the apparatus will indicate this fact to the user to enable him to secure the loop before arming the system by triggering of the flip/flop.
6 citations
01 Jul 1978
TL;DR: An overview of available intrusion detection sensors is provided, including the operating principles of each type of sensor, unique sensor characteristics, desired sensor improvements which must be considered in planning an intrusion detection system, and the site characteristics which affect the performance of both exterior and interior sensors.
Abstract: Intrusion detection sensors are an integral part of most physical security systems. Under the sponsorship of the U.S. Department of Energy, Office of Safeguards and Security, Sandia Laboratories has conducted a survey of available intrusion detection sensors and has tested a number of different sensors. An overview of these sensors is provided. This overview includes (1) the operating principles of each type of sensor, (2) unique sensor characteristics, (3) desired sensor improvements which must be considered in planning an intrusion detection system, and (4) the site characteristics which affect the performance of both exterior and interior sensors. Techniques which have been developed to evaluate various intrusion detection sensors are also discussed.
1 citations