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1. WO2009013549 - INFRASONIC INTRUDER ALARM

Publication Number WO/2009/013549
Publication Date 29.01.2009
International Application No. PCT/GB2008/050621
International Filing Date 24.07.2008
IPC
G08B 13/16 2006.1
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
13Burglar, theft or intruder alarms
16Actuation by interference with mechanical vibrations in air or other fluid
G08B 29/18 2006.1
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
CPC
G08B 13/1681
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
13Burglar, theft or intruder alarms
16Actuation by interference with mechanical vibrations in air or other fluid
1654using passive vibration detection systems
1681using infrasonic detecting means, e.g. a microphone operating below the audible frequency range
G08B 29/24
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
20Calibration, including self-calibrating arrangements
24Self-calibration, e.g. compensating for environmental drift or ageing of components
Applicants
  • INFRASONIC PULSE SENSING LIMITED [GB]/[GB] (AllExceptUS)
  • RUDDOCK, Derek James [GB]/[GB] (UsOnly)
Inventors
  • RUDDOCK, Derek James
Agents
  • SANDERSON, James
Priority Data
0714332.424.07.2007GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) INFRASONIC INTRUDER ALARM
(FR) ALARME ANTI-INTRUSION INFRASONIQUE
Abstract
(EN)
An infrasonic intruder alarm system (100) adapted to detect changes in infrasonic frequency in a defined space (101). The alarm system (100) comprises a transducer (13) for sensing infrasonic frequency variations, which is adapted to produce an analogue signal (20), a signal amplifier, an analogue to digital converter which is adapted to convert a portionof the analogue signal (20) which crosses at least one predetermined threshold into a digital signature (30), and a processor (15) adapted to compare the digital signature (30) against known digital signatures. An alarm event is triggered if the digital signal (30) produced matches a known signature, and an alarm (17) isactivated by the alarm event.
(FR)
L'invention concerne un système d'alarme anti-intrusion infrasonique (100) conçu pour détecter des changements dans une fréquence infrasonique dans un espace défini (101). Le système d'alarme (100) comprend un transducteur (13) pour détecter des variations de fréquence infrasonique, qui est conçu pour produire un signal analogique (20), un amplificateur de signal, un convertisseur analogique-numérique qui est conçu pour convertir une partie du signal analogique (20) qui franchit au moins un seuil prédéterminé en une signature numérique (30), et un processeur (15) conçu pour comparer la signature numérique (30) à des signatures numériques connues. Un événement d'alarme est déclenché si le signal numérique (30) produit correspond à une signature connue, et une alarme (17) est activée par l'événement d'alarme.
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