EP 0446385 B1 19950906 - Ultrasonic surveillance system for intruder detection.
Title (en)
Ultrasonic surveillance system for intruder detection.
Title (de)
Ultraschall-Überwachungssystem für eine Einbruchmeldeanlage.
Title (fr)
Système de surveillance à ultrasons pour la detection d'intrusion.
Publication
Application
Priority
EP 90104681 A 19900312
Abstract (en)
[origin: EP0446385A1] An ultrasonic motion detector exhibits at least one ultrasonic transmitter (S1) and at least two ultrasonic receivers (E1, E2) which are aligned towards a common surveillance area (ÜE). In an associated signal processing and evaluating device (SAE), the distance (e) and direction ( alpha ) of a moving object (OB) is determined by means of a microcomputer ( mu R) from the received echo signals (ES) and from this a motion track is formed, a criterion for alarm signalling (AL) being derived from the length and shape of the motion track. The distance (e) is determined from the transit-time differences and the direction ( alpha ) is determined from the phase differences between the processed echo signals. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/16 (2006.01)
CPC (source: EP)
G08B 13/1636 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0446385 A1 19910918; EP 0446385 B1 19950906; AT E127603 T1 19950915; DE 59009633 D1 19951012; DK 0446385 T3 19960115; ES 2075857 T3 19951016; GR 3017397 T3 19951231
DOCDB simple family (application)
EP 90104681 A 19900312; AT 90104681 T 19900312; DE 59009633 T 19900312; DK 90104681 T 19900312; ES 90104681 T 19900312; GR 950402525 T 19950913