EP0707292A1 - Système de sécurité pour porte - Google Patents

Système de sécurité pour porte Download PDF

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Publication number
EP0707292A1
EP0707292A1 EP94307232A EP94307232A EP0707292A1 EP 0707292 A1 EP0707292 A1 EP 0707292A1 EP 94307232 A EP94307232 A EP 94307232A EP 94307232 A EP94307232 A EP 94307232A EP 0707292 A1 EP0707292 A1 EP 0707292A1
Authority
EP
European Patent Office
Prior art keywords
door
security system
signal
detector
status indicator
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Withdrawn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
EP94307232A
Other languages
German (de)
English (en)
Inventor
Thomas Hartley Knowlden
Patrick Martin Collins
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.)
Burle Technologies Inc
Original Assignee
Burle Technologies Inc
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 Burle Technologies Inc filed Critical Burle Technologies Inc
Priority to EP94307232A priority Critical patent/EP0707292A1/fr
Priority to PCT/IB1995/000832 priority patent/WO1996010813A1/fr
Priority to JP8511569A priority patent/JPH09508738A/ja
Publication of EP0707292A1 publication Critical patent/EP0707292A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor

Definitions

  • the present invention relates to door security systems.
  • the invention is particularly useful as part of a system which enables controlled access to premises but the invention may have other applications.
  • a typical door security system includes a door contact switch, often magnetic, having its respective contacts mounted on the door and the door frame so that the switch is closed when the door is closed and open when the door is open.
  • the switch is typically linked to an alarm system which gives a warning signal when the door is opened and means are provided for preventing the generation of the warning signal in the event of an "authorised" opening of the door.
  • an electronic "key” or a key pad might be used to signal the alarm system not to generate a warning signal.
  • a sensor is often provided on the inside of the building adjacent to the door to detect the approach of a person and signal the alarm system not to generate a warning signal.
  • the sensor might be a passive infra-red (PIR) movement detector for example.
  • PIR passive infra-red
  • an electromagnetic lock may be provided from which power is removed on receipt of an "authorised opening” signal.
  • a relay operating the lock might bypass a door contact switch on receipt of an "authorised opening” signal to avoid opening of the door contact setting off an alarm.
  • a problem with these known systems is that they usually operate for a fixed amount of time, either to disable generation of an alarm signal or to unlock the door in the case where a lock is provided. This amount of time must be sufficient to allow the person sufficient time to exit and has to be set to the maximum time taken for a person to exit. This can often result in the door being left unlocked and/or the alarm system being bypassed for a period after the person has gone through the doorway during which unauthorised entry to the building would be possible.
  • the present invention provides a door security system for use with a door having a status indicator providing an electrical signal indicating whether the door is open or closed, the system comprising: detector means for generating a signal indicating an acceptable request to pass through the doorway; and access means activated in response to a signal from said detector means for enabling unhindered passage through the doorway; characterised by monitoring means responsible to said door status indicator for de-activating said access means when the door is closed following said signal from said detector means.
  • the system of the invention ensures that the access means is deactivated as soon as the door is closed by monitoring the door status indicator.
  • the detector means may comprise a passive infrared movement detector or any other movement detector.
  • the movement detector would typically be mounted on the inside of the door to operate the access means and allow free passage out of a building.
  • the detector means may comprise the key pad or card reader of an electronic lock which would generate the said signal in response to the correct code being entered either via the key pad or the card being inserted.
  • Other alternatives for the detector means include a simple push button switch, key operated switch or flip switch or any other means which provides a signal indicating a request to pass through the doorway.
  • the access means may operate to open an electronic lock, for example by removing power from a solenoid which holds the lock closed.
  • the access means may be activated to disable an alarm connected to the door status sensor so that the alarm is not set off when the door is opened.
  • the access means preferably comprises means such as a switch positioned in parallel to the door status indicator to bypass the door status indicator when the door is opened following an acceptable request to pass through the doorway. Then, for example, an alarm connected to the door status indicator would not receive a "door open” signal due to the bypass switch and the alarm would not be operated.
  • the monitoring means preferably comprises an inductance which is positioned in series with the door status indicator.
  • the inductance preferably comprises the secondary of a transformer which is connected to the detector means.
  • the monitoring means could equally well comprise a resistor positioned in series with the door status indicator with the voltage across the resistor being monitored to determine whether the door was open or closed.
  • the system preferably additionally includes a timer which is started in response to the signal from the detector means and determines the maximum time for which the access means is activated. Thus, if the maximum time expires before the door is closed, the access means is deactivated and, for example, an alarm may sound if the door has been propped open.
  • the invention also provides a complete system including the items noted above as well as the door status indicator and, optionally an electromagnetically operated door lock.
  • the illustrated embodiment of the invention comprises a detector 10.
  • the purpose of the detector 10 is to provide a signal indicating an acceptable request to pass through a door (not shown).
  • the detector could comprise a passive infra-red movement sensor or an ultrasonic object detector mounted on the inside of the door, or a card reader or key-pad on the outside of the door, for example.
  • the detector 10 outputs a signal on line 11 to a microprocessor 12 which includes a software timer.
  • Microprocessor 12 has a first output connected via relay control line 13 to relays to be described below, an enable/disable output provided on line 14 and a further input received on line 15.
  • the door has a contact switch 20 connected to an alarm system 30.
  • the alarm system would typically sound a warning if the contact switch was open indicating that the door was open.
  • a first relay operated switch 21 Connected in parallel to the door contact switch is a first relay operated switch 21.
  • the relay operated switch 21 is connected in series with the secondary winding of a transformer 22.
  • the door is provided with a lock 23 to which power is supplied via a switch 24.
  • Both switches 21 and 24 may be relay operated switches and may in fact be operated by the same relay.
  • Switch 24 is normally closed so that the lock 23 is powered and operative.
  • Switch 21 is normally open.
  • microprocessor 12 provides a signal on line 14 which enables or disables square wave generator 31, the square wave signal is then smoothed by smoothing circuit 32 and passed through buffer circuit 33. The resulting a.c. signal appears across the primary of transformer 22 and is monitored by a peak detector 34. The peak voltage is compared with a reference voltage in a comparator 35 whose output is supplied back to the microprocessor.
  • the detector means When the detector means generates a signal indicating an acceptable request to pass through the doorway, this signal is passed from the detector along line 11 to the microprocessor 12. In response to this signal, the microprocessor 12 generates a signal on line 13 to operate the relay controlling switches 21 and 24 and an enable signal on line 14 to square wave generator 31, and starts the timer.
  • the operation of the relay causes switch 24 to open, removing power from lock 23 and enabling the door to be opened.
  • the relay also operates to cause switch 21 to be closed.
  • the microprocessor 12 then removes the signals on lines 13 and 14 and re-sets its internal timer. Thus, switch 21 opens, and switch 24 closes to re-apply power to the lock.
  • the microprocessor only removes the signals on lines 13 and 14 and stops the timer if the door has been opened and then closed following a signal from the detector 10. This is achieved through suitable programming of the microprocessor. Thus, when the switch 21 has been closed in response to a signal on line 13 and before the door has been opened, the microprocessor maintains the signals on lines 13 and 14.
  • the timer is restarted each time a new signal from the detector is received to enable repeated exits or entrances through the door.
  • the microprocessor also includes a "failsafe" feature, whereby if the door is not opened within a predetermined time after receipt of a detection signal, the timer is re-set and the signals on lines 13 and 14 are removed. This feature is useful in the event of a false detection signal being generated, for any reason.
  • Another optional feature which may be provided in the system of the invention is an audible or visible warning signal which operates at a predetermined interval before the timer has "timed out” if the door has not already been closed. This will warn users that the alarm controlled by the alarm panel 30 will activate if the door is not closed.
  • the predetermined time could be say 5 seconds.
  • the drawing shows a buzzer 40 connected to the microprocessor 12. Through suitable programming of the microprocessor, the buzzer 40 will operate 5 seconds before the timer has timed out.
  • the dotted line in the drawing separates door lock 23, door contact switch 20 and alarm system 30 from the other components of the system.
  • the purpose of the dotted line is to show that the components to the left of the dotted line could easily be supplied for addition to an existing door fitted with contact switch 20, optionally linked to an alarm system and possibly having an electronic lock. No modification of the alarm system is necessary to provide the extra security which the system of the present invention provides.
EP94307232A 1994-10-03 1994-10-03 Système de sécurité pour porte Withdrawn EP0707292A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP94307232A EP0707292A1 (fr) 1994-10-03 1994-10-03 Système de sécurité pour porte
PCT/IB1995/000832 WO1996010813A1 (fr) 1994-10-03 1995-10-03 Systeme de securite de porte
JP8511569A JPH09508738A (ja) 1994-10-03 1995-10-03 ドア保全システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94307232A EP0707292A1 (fr) 1994-10-03 1994-10-03 Système de sécurité pour porte

Publications (1)

Publication Number Publication Date
EP0707292A1 true EP0707292A1 (fr) 1996-04-17

Family

ID=8217870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94307232A Withdrawn EP0707292A1 (fr) 1994-10-03 1994-10-03 Système de sécurité pour porte

Country Status (3)

Country Link
EP (1) EP0707292A1 (fr)
JP (1) JPH09508738A (fr)
WO (1) WO1996010813A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053456A1 (fr) * 1998-04-09 1999-10-21 Ist International Security Technology Oy Systeme de controle automatique pour un appareil de securite
US20120248209A1 (en) * 2011-03-31 2012-10-04 Drew Reid Hvac setback system
EP3188573A1 (fr) * 2015-12-29 2017-07-05 "Stabil" Piotr Narczyk Système et procédé permettant de commander l 'alimentation électrique dans une salle d'une utilisation temporaire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1642607A1 (fr) 2004-10-04 2006-04-05 Sanofi-Aventis Deutschland GmbH Mécanisme d'affichage de dose destiné à un dispositif d'administration de médicament

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090182A (en) * 1976-03-22 1978-05-16 Robert Bruno Young Security system employing radio transmitter and receiver
US4412356A (en) * 1980-01-14 1983-10-25 Iowa State University Research Foundation, Inc. Light actuated remote control security system
US4763937A (en) * 1986-09-11 1988-08-16 Sittnick Jr Ralph A Electromagnetic door lock system
EP0580003A2 (fr) * 1992-07-24 1994-01-26 Audi Ag Dispositif d'alarme pour surveiller le temps de l'ouverture d'une porte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2223765B1 (fr) * 1973-03-28 1978-06-02 Trapark Ab
US4410884A (en) * 1977-08-18 1983-10-18 Firma Aug. Winkhaus Alarm system
US4803467A (en) * 1988-02-23 1989-02-07 George Peters Magnetic key lock provided with an alarm system
US5003290A (en) * 1990-01-11 1991-03-26 Lindquist Jonathan B Integrated alarm and access control system
US5043720A (en) * 1990-04-23 1991-08-27 Laurienzo Paul G Keyless access control system
US5138299A (en) * 1991-03-07 1992-08-11 Honeywell Inc. Showcase alarm system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090182A (en) * 1976-03-22 1978-05-16 Robert Bruno Young Security system employing radio transmitter and receiver
US4412356A (en) * 1980-01-14 1983-10-25 Iowa State University Research Foundation, Inc. Light actuated remote control security system
US4763937A (en) * 1986-09-11 1988-08-16 Sittnick Jr Ralph A Electromagnetic door lock system
EP0580003A2 (fr) * 1992-07-24 1994-01-26 Audi Ag Dispositif d'alarme pour surveiller le temps de l'ouverture d'une porte

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053456A1 (fr) * 1998-04-09 1999-10-21 Ist International Security Technology Oy Systeme de controle automatique pour un appareil de securite
US6331816B1 (en) 1998-04-09 2001-12-18 Ist International Security Technology Oy Automatic control system for security apparatus based on the presence of a user
US20120248209A1 (en) * 2011-03-31 2012-10-04 Drew Reid Hvac setback system
EP3188573A1 (fr) * 2015-12-29 2017-07-05 "Stabil" Piotr Narczyk Système et procédé permettant de commander l 'alimentation électrique dans une salle d'une utilisation temporaire

Also Published As

Publication number Publication date
JPH09508738A (ja) 1997-09-02
WO1996010813A1 (fr) 1996-04-11

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