EP0693207A1 - Procede de surveillance d'un panneau de vitre - Google Patents

Procede de surveillance d'un panneau de vitre

Info

Publication number
EP0693207A1
EP0693207A1 EP94912723A EP94912723A EP0693207A1 EP 0693207 A1 EP0693207 A1 EP 0693207A1 EP 94912723 A EP94912723 A EP 94912723A EP 94912723 A EP94912723 A EP 94912723A EP 0693207 A1 EP0693207 A1 EP 0693207A1
Authority
EP
European Patent Office
Prior art keywords
zone
electric
sensing
pane
electronic unit
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Withdrawn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
EP94912723A
Other languages
German (de)
English (en)
Inventor
Göran Hansson
Bo Lindgren
Tommy Soderberg
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0693207A1 publication Critical patent/EP0693207A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Definitions

  • the present invention relates to a surveillance method and a device for a glass pane, and more exactly a method and a device for a diversified surveillance, preferably of viewers in front of a glass pane, e.g., a shop-window.
  • a drawback of these systems is that they will start acting after that a damage of the pane already is a fact and a theft of items already is taking place.
  • a system for detection of an object, e.g. person being present in the vicinity of a machine or a moving part of a machine. This is achieved by detecting an induced AC voltage within the object, this voltage immediately being sensed upon a contact between the machine and the object.
  • the disclosed system does not directly discuss how a detection may be done in the vicinity of an object already before an ohmic contacting takes place between the object and the machine.
  • the present invention relates to a method and a device at a glass pane for a surveillance with preferably three different sensing zones, one general presence zone for the indication that somebody is present in front of the pane, one close zone or touch zone for the indication and, e.g., an acoustic warning if somebody comes closer than a predetermined distance (outer alert boundary) and an alarm zone which furthermore alerts the surveillance personnel as soon as somebody grazes or touches the glass pane (inner alert boundary).
  • a locally generated first electric or electromagnetic field and a locally generated second electric or electromagnetic field are utilized and in which fields changes are sensed by an electronic sensing device.
  • the fields are achieved by means of an electrode out of a transparent but conducting sheet preferably coating the inner side of the glass pane to be guarded.
  • the first and the second electric or electromagnetic fields are generated by means of an electronic unit which electrically is connected to the pane conducting sheet and which additionally constitutes the electrode for sensing changes of the thereby generated fields due to a presence of an electrically conducting body.
  • the electronic unit by means of the electrode thereby covering the entire glass pane performs a capacitive measurement whereby additionally is detected if a conducting object, detected by the first and second electric or electromagnetic fields, is coming very close to or in contact with the pane.
  • Fig. 1 shows from the side in a cross section a shop-window having the different sensing zones according to the present invention
  • Fig. 2 shows in a exemplifying embodiment a window according to the present invention seen in a plane view and having additional devices for the registration of objects entering into a region between an outer alarm boundary and an inner boundary having measures to be taken.
  • a window pane 10 in a wall 12 is provided, preferably on the inner surface, with an electrically conducting UV/sun and heat protection film 14.
  • the film 14 constituting an electrode is electrically connected to an electronic unit (not shown) generating a first electric field and a second electric field.
  • the electric fields are accomplished by means of at least one AC generator in the electronic unit making that the electrode created by the film 14 is oscillating with the frequency and the amplitude created by the generator.
  • the generator supplies a square wave having fast flanks.
  • the electronic unit is provided with a number of light emitting diodes for the indica ⁇ tion of different status values.
  • the first field is designed to operate with, for instance, a sensing region 100 - 150 cm from the pane. This sensing region then defines a presence zone. In other words, as soon as a conducting body enters within the area covered by the field defining the presence zone the electronic unit will register this and indicates by flashing a first LED, that an object, for instance, a person is present within the presence zone.
  • a second electric field is also generated by the electronic unit but having a smaller sensing region, for example 30 cm from the pane, which in figure 1 is denoted as a touch zone or close zone.
  • a touch zone or close zone In other words, if an object in form of a person is present within this area he will be that close such that the pane may be touched. In this case the electronic unit registers that both the first and the second field are disturbed by the present object. Then an additional LED is lit on the electronic unit simulta ⁇ neously as in the exemplifying embodiment a buzzer tone is heard and an alarm sign is blinking with information that the viewer is within a prohibited limit.
  • figure 2 is in a front view demonstrated in an exemplifying embodiment the window.
  • the pane 12 is of a type EKO glass from Emmaboda Glas AB provided with a built in UV/sun and heat filter 14 and which has been provided with an electrical termination device.
  • a warning sign 20 informing that the pane is guarded and visually notifying the observer that he is to close to the pane.
  • an illumination source 22 a so called spotlight, which is lit and illuminating the viewer at the same time as the buzzer tone is sounding and additionally another LED at the electronic unit is lit to indicate this status.
  • Simulta ⁇ neous a camera 24 is ready to take pictures if the trespassing continues over a certain predetermined time period.
  • the camera may be an ordinary camera for 35 mm film and/or a video camera and positioned at a distance from the window such that a further indirect protection of the photographing equipment is obtained.
  • the light from the illumination source 22 by blinding in some respect disturbs the viewing through the glass pane, why a viewer automatically wishing to observe items behind the pane will move backwards whereby the illumination source 22 will be shut off as soon as this viewer comes out of the zone covered in common by the first and the second electric fields generated by the electronic unit.
  • the camera will be triggered and it will at least make one frame, simultaneously as a central alarm is triggered indicating that a person has been staying within the touch zone during a period of time not allowed.
  • the electronic unit has a third capacitive measure ⁇ ment, which means that if a person comes in contact with or touches the pane an alarm will immediately be triggered and the camera equipment fully activated. As soon as an alarm is triggered this is indicated by an additional particular LED being lit, and this indication remains until it is influenced by manually resetting the alarm.
  • the electronic unit itself may be positioned at an optional site and may well for instance be positioned in a manned surveillance central, whereby easily the status of each guarded windows directly may be read by means of the LED:s of their respective electronic units.
  • the advantage of the present system is that the entire pane surface has the same status in respect of surveillance and alarm due to that the three zones, presence zone, touch zone and alarm zone are principally equally defined over the entire guarded pane surface by the conducting film on the pane inner side, which film constitutes both a feeding and a measurement electrode in the surveillance system.
  • the beep tone will sound as soon as the hand is closer to the pane than 30 cm. This generally forms an essentially improved protection guard in that an indication is obtained that something is under way already before an intrusion has taken place. This has a notable deterrent effect by among other things the triggering of light and sound signals.
  • the sizes of the respective sensing zone of the embodiment are only exemplifying and are simply individually adopted to prefe ⁇ rable values of distance by adjustment of the electronic unit by means of potentiometers according to the state of the art.

Landscapes

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

Abstract

La présente invention se rapporte à un procédé et un dispositif de surveillance d'un panneau de vitre (12), comprenant l'utilisation de premier et second champs électriques ou électromagnétiques générés localement, dans lesquels des variations dues à l'introduction d'un objet électroconducteur sont détectées par un dispositif de mesure électronique. Les champs sont produits par une unité électronique et par l'intermédiaire d'une couche transparente mais conductrice (14), laquelle est de préférence appliquée à la surface interne du panneau de vitre à surveiller. La couche conductrice (14) constitue simultanément une électrode servant à détecter des variations produites dans les champs ainsi générés en raison de la présence d'un corps électroconducteur. En outre, l'unité électronique effectue, par l'intermédiaire de cette électrode, et de façon à couvrir le panneau tout entier, une mesure capacitive permettant de détecter en outre si un objet conducteur, détecté par les premier et second champs électriques ou électromagnétiques, va se rapprocher davantage du panneau ou entrer en contact avec ce dernier. Différentes zones de surveillance (1, 2, 3), présentant différents niveaux d'alarme, sont définies par l'intermédiaire des champs électriques ou électromagnétiques appliqués et de cette mesure capacitive.
EP94912723A 1993-04-08 1994-04-07 Procede de surveillance d'un panneau de vitre Withdrawn EP0693207A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9301206 1993-04-08
SE9301206A SE9301206L (sv) 1993-04-08 1993-04-08 Övervakningsförfarande och anordning vid glasruta
PCT/SE1994/000308 WO1994024645A1 (fr) 1993-04-08 1994-04-07 Procede de surveillance d'un panneau de vitre

Publications (1)

Publication Number Publication Date
EP0693207A1 true EP0693207A1 (fr) 1996-01-24

Family

ID=20389549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94912723A Withdrawn EP0693207A1 (fr) 1993-04-08 1994-04-07 Procede de surveillance d'un panneau de vitre

Country Status (4)

Country Link
EP (1) EP0693207A1 (fr)
AU (1) AU6515094A (fr)
SE (1) SE9301206L (fr)
WO (1) WO1994024645A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9303582D0 (sv) * 1993-10-29 1993-10-29 Goeran Hansson Berörings- och stöldskydd för kontorsutrustning
EP0850385B1 (fr) * 1995-09-25 2002-10-02 Jorn Sorensen Procede et dispositif de detection de la distance entre un premier objet et un second objet
DE19703844A1 (de) * 1997-02-01 1998-08-06 Arcon Flachglasveredlungsgesel Annäherungssensor oder Berührungsschalter oder Bruchschalter oder dergleichen
US7109726B2 (en) * 2001-07-25 2006-09-19 Koninklijke Philips Electronics N.V. Object sensing
NL2003554C2 (nl) 2009-09-25 2011-03-28 Henri Peteri Beheer Bv Kokendwaterkraan.
ES2714688T3 (es) * 2015-04-01 2019-05-29 Ontech Security S L Sistema de seguridad doméstico

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1596300A (en) * 1978-05-15 1981-08-26 Philips C C Burglar alarms
DE3227876A1 (de) * 1981-11-20 1983-06-01 Fa. Aug. Winkhaus, 4404 Telgte Alarmanlage zur sicherung eines durchgangs
GB2184277B (en) * 1985-12-12 1990-02-07 Smiths Industries Plc Intruder alarm systems and methods of deterring intruders
US4987402A (en) * 1987-01-21 1991-01-22 Electronic Security Products Of California Alarm system for sensing and vocally warning of an unauthorized approach towards a protected object or zone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9424645A1 *

Also Published As

Publication number Publication date
AU6515094A (en) 1994-11-08
SE9301206L (sv) 1994-10-09
SE9301206D0 (sv) 1993-04-08
WO1994024645A1 (fr) 1994-10-27

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