EP0175780A1 - Procede et installation pour assurer la securite de pieces fermees - Google Patents

Procede et installation pour assurer la securite de pieces fermees

Info

Publication number
EP0175780A1
EP0175780A1 EP19850902009 EP85902009A EP0175780A1 EP 0175780 A1 EP0175780 A1 EP 0175780A1 EP 19850902009 EP19850902009 EP 19850902009 EP 85902009 A EP85902009 A EP 85902009A EP 0175780 A1 EP0175780 A1 EP 0175780A1
Authority
EP
European Patent Office
Prior art keywords
changes
doors
windows
events
air pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19850902009
Other languages
German (de)
English (en)
Inventor
Gerhard Baumann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASE ELECTRONIC GmbH
Original Assignee
BASE ELECTRONIC GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASE ELECTRONIC GmbH filed Critical BASE ELECTRONIC GmbH
Publication of EP0175780A1 publication Critical patent/EP0175780A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/20—Actuation by change of fluid pressure
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range

Definitions

  • the invention relates to a method for securing closed rooms against burglary, unauthorized entry and / or unwanted opening of windows and doors and a device for performing the method.
  • the object of the invention is to provide a method and a device of the type mentioned by which the opening of doors and windows is reported in a simple and effective manner.
  • the solution according to the invention consists in measuring the air pressure in the interior of the room, filtering out low-frequency changes from the frequency spectrum of changes in air pressure and generating a signal when such changes are detected.
  • the invention is based on the surprising finding that the opening of doors and windows is accompanied by changes in air pressure, that is to say pressure waves of very characteristic low frequencies. These frequencies in the air pressure change spectrum only occur when windows and doors are opened, but not when normal use is also made of occupied rooms.
  • infrasound events are measured and evaluated, in a particularly advantageous embodiment, infrasound events with a duration of 100 msec to 1 sec, preferably approximately 400 msec, are filtered out.
  • the alarm can be reported within and with the aid of a relatively small closed device. No complex installation lines are required.
  • the device could be operated with batteries, for example, so that it can easily be moved to another location in a house. If you want to park it in a room that you want to leave afterwards, known devices can be provided by which the device can be armed with a time delay so that the person switching on the device can still leave the room without that an alarm is reported. Corresponding time delays can be provided for triggering the alarm so that it is possible to switch off the device after entering the room and before triggering the alarm.
  • a frequency range at approximately 2.5 Hz has proven to be particularly suitable for the detection and simultaneous avoidance of false alarms.
  • a device for carrying out the method is distinguished by the fact that it has a sound pickup, which is provided with an airtight space sealed by a membrane, and an electronic evaluation circuit.
  • This sound absorber acts like a barometer, so it also absorbs extremely slow air pressure fluctuations, since when the air pressure increases, the membrane is pressed further towards the closed cavity and bends further away from the closed cavity when the external air pressure is lowered. The deflection of the membrane can then be detected, e.g. mechanically, and converted into an electrical measured variable, which is then subjected to frequency filtering.
  • the air pressure fluctuation can be measured more precisely and better if the device has devices for measuring changes in capacitance when the membrane moves.
  • the capacity changes e.g. from an electrode attached to the membrane to a fixed electrode, e.g. can be attached to the cavity.
  • the two electrodes can be the entire membrane, if it is made of metal, and the cavity wall, in which case only the membrane has to be insulated from the cavity wall and must be airtight.
  • the capacitance of the measuring device is namely the resonant circuit capacitance of a parallel resonant circuit
  • the oscillation frequency changes when it is determined by the corresponding resonant circuit.
  • These frequency changes can then be detected and further processed electronically.
  • impedance changes in the capacitance alone or in a parallel or series resonance circuit which occur because of the capacitance changes.
  • FIG. 1 is a block diagram of a device according to the invention.
  • Fig. 2 shows a section through a sound pickup, as it can be used in the invention.
  • the 1 shows a sound pickup 1, which is connected to an electronic evaluation circuit 2.
  • the evaluation circuit 2 is then connected to a switching unit 3, by means of which the characteristics of the alarm can be set and changed, such as, for example, the delay between detection of an alarm state and triggering the alarm or different duration of the alarm after an event has occurred.
  • a setting device 4 is also connected to the evaluation circuit 2, on which the sensitivity of the device can be adjusted.
  • the unit 3, in which the time delay, alarm duration and the like can be set, is then still connected to the alarm device 5, by means of which an alarm is given, for example a siren, a flashing light and the like.
  • the housing 6 has a housing 6, on the inner wall of which an electrode 7 is fastened. Opposite the electrode 7, the housing 6 has an opening which is closed with a membrane 8, so that a cavity 9 is enclosed between the electrode 7 and the membrane 8.
  • the electrode 7 is connected to an electrical line 10, the membrane 8 to an electrical line 11.
  • the air pressure changes, also the changes für ⁇ deflection of the diaphragm 8, thereby changing the capacitance of the Konden ⁇ crystallizer, v formed by electrode 7 and the diaphragm. 8

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

Dans le procédé et l'installation pour assurer la sécurité de pièces fermées en empêchant l'ouverture indésirable des fenêtres et des portes, on mesure dans la zone de basse fréquence les modifications caractéristiques de la pression d'air, les évènements infrasonores et/ou les modifications du comportement de résonnance des pièces survenant lors de l'ouverture des fenêtres et des portes, que l'on utilise pour déclencher une alarme.
EP19850902009 1984-04-05 1985-04-02 Procede et installation pour assurer la securite de pieces fermees Withdrawn EP0175780A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412914 1984-04-05
DE19843412914 DE3412914A1 (de) 1984-04-05 1984-04-05 Verfahren und vorrichtung zur sicherung von geschlossenen raeumen

Publications (1)

Publication Number Publication Date
EP0175780A1 true EP0175780A1 (fr) 1986-04-02

Family

ID=6232806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850902009 Withdrawn EP0175780A1 (fr) 1984-04-05 1985-04-02 Procede et installation pour assurer la securite de pieces fermees

Country Status (4)

Country Link
EP (1) EP0175780A1 (fr)
AU (1) AU4231485A (fr)
DE (1) DE3412914A1 (fr)
WO (1) WO1985004744A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE56099T1 (de) * 1985-10-14 1990-09-15 Microprotector Ltd Detektor- und alarmanlage.
FR2589609B1 (fr) * 1985-10-31 1988-09-09 Frere Emmanuel Dispositif d'arlarme, notamment pour la surveillance de locaux
DE3611184C1 (de) * 1986-04-03 1987-09-03 Hirschmann Radiotechnik Verfahren und Vorrichtung zur Raumsicherung
GB2231660A (en) * 1989-03-02 1990-11-21 David Mainprize Detecting entry into an enclosed space from air pressure changes
GB2234068A (en) * 1989-03-13 1991-01-23 * Mistry Chand Infra-sonic detectors for use in alarm systems
JP2928359B2 (ja) * 1990-09-07 1999-08-03 住友金属鉱山株式会社 ドアを有する室内の人体存在検知装置
DE4036617A1 (de) * 1990-11-16 1992-05-21 Harald Steinbrucker Einbruchmelder
FR2708772A1 (fr) * 1993-08-05 1995-02-10 Kaths Diffusion Dispositif de détection à faible consommation d'énergie.
FI98328C (fi) * 1993-12-07 1997-05-26 Jouni Mikael Utter Kytkinjärjestelmä
GB2302406B (en) * 1995-06-19 1999-08-25 Bright Star Entpr Ltd Apparatus for detecting the breaching of a closed environment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR972292A (fr) * 1942-09-10 1951-01-29 Détecteurs d'infra-sons et avertisseurs et leur application à la détection d'ouvertures de portes et de fenêtres
FR1088157A (fr) * 1953-02-03 1955-03-03 Perfectionnements apportés aux microphones électrostatiques
FR2080124A5 (fr) * 1970-02-24 1971-11-12 Wattson Ste Nle Etude
US3914755A (en) * 1973-12-10 1975-10-21 Vann Signal Devices Inc Pressure change responsive alarm apparatus
DE3037802A1 (de) * 1980-10-07 1982-05-13 Robert Bosch Gmbh, 7000 Stuttgart Kapazitiver weg-frequenz-messgroessenwandler, insbesondere druck-frequenzwandler
DE3128755A1 (de) * 1981-07-21 1983-02-10 Hoechst Ag, 6000 Frankfurt 3-alkoxipropylenimino-bis(methylenphosphonsaeuren) und deren salze, verfahren zu deren herstellung und deren verwendung
FR2523339A1 (fr) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro Dispositif de detection a capteur volumetrique a infra-sons et procede de detection par infra-sons

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8504744A1 *

Also Published As

Publication number Publication date
WO1985004744A1 (fr) 1985-10-24
AU4231485A (en) 1985-11-01
DE3412914A1 (de) 1985-10-31

Similar Documents

Publication Publication Date Title
EP0239817B1 (fr) Procédé et dispositif pour la protection d'espace
EP0175780A1 (fr) Procede et installation pour assurer la securite de pieces fermees
DE2260352A1 (de) Vorrichtung zur feststellung der beschaedigung von glasscheiben oder aehnlichem
DE102010024486B4 (de) Ein- und Aufbruchschutz für Fenster und Türen
DE69124661T2 (de) Einbruch-Detektor
DE4328697A1 (de) Anlage zur Vernebelung von geschlossenen Räumen
DE3243161A1 (de) Vorrichtung zum sichern von fenstern, tueren oder dergleichen
DE3410888C1 (de) Überwachungsanlage
DE4226543A1 (de) Verfahren zur Bewertung von Echosignalen in Sicherungssystemen für Innenräume
DE2952725C2 (de) Objektschutzeinrichtung, insbesondere für Gebäude, Wohnhäuser o.dgl.
DE102009058797B4 (de) Verfahren zum Ausführen einer Infraschall-Einbruchsdetektion
EP0286897A1 (fr) Méthode et dispositif de surveillance d'espaces clos
DE3246906A1 (de) Anordnung zur erschwerung von einbruchdiebstaehlen
CH643078A5 (de) Verfahren und anordnung zur einbruchmeldung.
DE3244188A1 (de) Warngeraet zur ueberwachung von fenstern und tueren an gebaeuden
DE3924622A1 (de) Alarmanlage zum schutze von autos, gebaeuden und dgl.
DE3420439A1 (de) Gehaeuse fuer ueberwachungsanlagen
DE202020101314U1 (de) Zusatzeinrichtung für eine auf drahtlose Magnetkontakte reagierende Funkalarmanlage
DE3419802C2 (de) Einbruchalarmeinrichtung für abgeschlossene Räume
DE3346839A1 (de) Behaeltnis, insbesondere tresor, mit selbsttaetiger alarmgebung
DE3504552A1 (de) Installationslos arbeitende alarmausloesevorrichtung und apparat
DE69303294T2 (de) Vorrichtung zum detektieren eines eindringlings in ein fahrzeug
DE102004048585A1 (de) Einbruchmeldeanlage
EP1375269A1 (fr) Procédé de surveillance acoustique
DE3535222A1 (de) Einbruchmelder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860318

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BAUMANN, GERHARD