Apparatus for the surveillance of an electronic security element

Details Apparatus for the surveillance of an electronic security element Apparatus for the surveillance of an electronic security element

1997-11-20

1999-10-19

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

G08B 1314

Patent

active

059696117

ABSTRACT:
The present invention relates to an apparatus for the surveillance of an electronic security element in an interrogation zone. The essential elements are a transmitting device, a receiving device and a computing/control unit. The transmitting device emits at least one interrogation signal into the interrogation zone. This signal causes the security element to emit a characteristic signal. The receiving device receives the characteristic signal and generates a signal which is an indication of the characteristic signal. The computing/control unit evaluates the signals received from the receiving device and produces an alarm when the presence of the security element is established. The evaluation comprises detecting spikes from the signals received from the receiving device, creating a corresponding signal shape from the spikes in a self-learning process, and removing the determined spikes from the signals received from the receiving device.

REFERENCES:
patent: 4168496 (1979-09-01), Lichtblau
patent: 4459474 (1984-07-01), Walton
patent: 4531117 (1985-07-01), Nourse et al.
patent: 4663612 (1987-05-01), Mejia et al.
patent: 4668942 (1987-05-01), Eccleston et al.
patent: 4888579 (1989-12-01), ReMine et al.
patent: 4992675 (1991-02-01), Conner, Jr. et al.
patent: 5239459 (1993-08-01), Hunt et al.
patent: 5349339 (1994-09-01), Kind

Affiliated with

Also associated with

Rating

Apparatus for the surveillance of an electronic security element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for the surveillance of an electronic security element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for the surveillance of an electronic security element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2061438