EP1272990B1 - Dispositif de securite a communication bidirectionnelle - Google Patents

Dispositif de securite a communication bidirectionnelle Download PDF

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Publication number
EP1272990B1
EP1272990B1 EP01919697A EP01919697A EP1272990B1 EP 1272990 B1 EP1272990 B1 EP 1272990B1 EP 01919697 A EP01919697 A EP 01919697A EP 01919697 A EP01919697 A EP 01919697A EP 1272990 B1 EP1272990 B1 EP 1272990B1
Authority
EP
European Patent Office
Prior art keywords
led
unit
peripheral unit
security device
logic control
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.)
Expired - Lifetime
Application number
EP01919697A
Other languages
German (de)
English (en)
Other versions
EP1272990A1 (fr
Inventor
Cristiano Zambon
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.)
Pittway Corp
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Pittway Corp
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Filing date
Publication date
Application filed by Pittway Corp filed Critical Pittway Corp
Publication of EP1272990A1 publication Critical patent/EP1272990A1/fr
Application granted granted Critical
Publication of EP1272990B1 publication Critical patent/EP1272990B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Definitions

  • the present invention relates to a security device with bidirectional communication.
  • the invention relates to a security device capable of communicating both with a control unit and directly with a user.
  • a control unit manages peripheral units (usually sensors or actuators) by means of a two-wire line or by means of radio systems.
  • control unit determines whether, according to the control program, the environmental parameters detected by the sensors correspond or not to an alarm condition and the control unit therefore activates, if appropriate, the corresponding alarm procedures, such as visual or acoustic signals or the like.
  • control units and peripheral units are entrusted to proprietary protocols which are compatible with the power supply requirements, if any, of the sensors and most of all with the requirements of sturdiness and immunity to noise which are typical of a security system.
  • control unit Clearly, the possibility of communication between the control unit and the peripheral units allows higher flexibility and maintenance capability of the security system and ultimately gives an added value to the system as a whole.
  • control unit communicates with peripheral units.
  • peripheral units communicated exclusively to a two-wire line, as mentioned, such as for example a bus, or to radio systems.
  • the aim of the present invention is to provide a security device with bidirectional communication capability which allows users to act directly on the peripheral units in addition to acting on them from the control unit.
  • an object of the present invention is to provide a security device with bidirectional communication capability which allows to use the normal visual indication device of a peripheral unit for interacting with said peripheral unit.
  • Another object of the present invention is to provide a security device with bidirectional communication capability which allows to interact with a peripheral unit directly at the site where said peripheral unit is installed.
  • Another object of the present invention is to provide a security device with bidirectional communication capability which is highly reliable, relatively simple to manufacture and at competitive costs.
  • a security device with bidirectional communication capability comprising logic control means which are adapted to control at least one LED for indicating the operating status of a peripheral unit in which said security device is accommodated, characterized in that it comprises at least one resistor which is connected in parallel to said at least one LED, for converting into voltage light energy received from said at least one LED, said LED being connected to means for evaluating said voltage generated thereby, said means being in turn connected to said logic control means.
  • the security device comprises logic control means 12 which are connected to memory means 13 and to management means 14 which are adapted to manage the operation of at least one LED.
  • the logic control means 12 are connected to a power buffer 15, which is adapted to drive at least one LED 16 which provides an indication of the operating status of the peripheral unit in which the security device is accommodated.
  • the peripheral unit can be for example a sensor or an actuator.
  • a resistor 17 is interposed between the output of the power buffer 15 and the LED 16 and allows to reduce the current in output from the power buffer 15 for supplying power to the LED 16.
  • the LED 16 is used not only as a device for signaling the operating status of the peripheral unit but also in reverse, as explained in detail hereinafter.
  • the LED is in fact usually a device designed to convert electric energy into light energy, with a photoelectric effect, in order to provide in this case an indication of the operating status of the peripheral unit.
  • the LED also acts as a photodiode, i.e., it performs the opposite conversion, from light energy to electric energy.
  • a p-n junction if crossed by a current, can emit photons whose energy is linked to the type of doping of the junction. Likewise, if a p-n junction is illuminated by photons of the appropriate energy, hole-electron pairs are produced which, by flowing through the junction, generate a current which is proportional to the intensity of the incident light.
  • the efficiency of quantum conversion i.e., the amount of current that can be generated in relation to a given incident light energy
  • the LED is an optoelectronic device designed and optimized for the opposite conversion, i.e., from electric energy to light energy.
  • the photocurrent that is obtained from the LED if it is illuminated appropriately with a light source tuned to the same wavelength as the LED is capable of providing a signal whose amplitude is sufficient to allow processing by an amplifier-comparator block.
  • an additional semiduplex communication channel is available which, in addition to the conventional two-wire line that connects the peripheral unit to a control unit, allows communication with said control unit.
  • the security device 10 therefore comprises an additional resistor 18 which is connected in parallel to the LED 16 so as to convert into voltage the current generated when the LED 16 acts as a receiver.
  • the number of resistors 18 is of course equal to the number of LEDs 16 provided in output to the peripheral unit that accommodates the security device 10.
  • Switching means 19 are further provided in order to connect the voltage signal produced by the LED 16 when it is lit to comparator means 20 which are adapted to compare said voltage signal with a comparison voltage 21, so as to generate a signal 22 which represents the difference between the voltage detected by the LED 16 and the reference voltage 21 sent by the logic control means 12.
  • the amplifier-comparator 20 further allows to amplify said voltage difference signal.
  • the switching means 19 are therefore normally operatively open when the LED 16 acts as an optoelectronic device for indicating the operating status of the peripheral unit, i.e., when it provides an external indication of the operation of said peripheral unit.
  • the switching means 19 are closed, activating the path that connects the LED 16 to the amplifier-comparator means 20, shifting the power buffer 15 to a high-impedance state.
  • a second communication channel is created alongside the normal two-wire or radio communication channel that connects the peripheral unit to the control unit (which is not shown in the figures).
  • FIG. 2 is a schematic view of a peripheral unit 30 which internally accommodates the security device 10 according to the present invention.
  • the reference numeral 16 designates, in this case, again the LED for external indication of the operating status of said peripheral unit.
  • a first embodiment provides for an external unit 31 which is appropriately provided with an optical input and output device.
  • the optical input and output device comprises at least one ultrabright LED 32 which is arranged to the side of a photodiode or phototransistor 33 so that the LED 32 is capable of illuminating the LED 16 of the peripheral unit 30 and thus make it act as a receiving element.
  • the photodiode 33 of the external unit 31 allows to receive light information from the LED 16 of the peripheral unit 30.
  • the external unit 31 is appropriately interfaced mechanically with the peripheral unit 30 so as to keep the optical input and output device 32, 33 at a short distance from the LED 16.
  • the peripheral unit 30 is again interfaced with the external unit 31, but in this case the optical input-output device is constituted by at least one optical fiber 34.
  • the security device allows to obtain an additional bidirectional communication channel which is added alongside the normal communication channel provided between a peripheral unit and a control unit meant to control the operation of said peripheral unit.
  • the "optical" channel thus created allows the operator to act directly on the peripheral units in the operating environment, i.e., at the installation site, with consequent advantages in terms of operation and maintenance.
  • the security device according to the invention can be easily integrated in a control unit of a commercially known type with a minimal increase in its dimensions.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Electroluminescent Light Sources (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Telephone Function (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Eye Examination Apparatus (AREA)
  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)

Claims (16)

  1. Dispositif de sécurité permettant une communication bidirectionnelle, comprenant des moyens de commande logiques aptes à commander au moins une DEL pour indiquer l'état de fonctionnement d'un périphérique dans lequel est logé ledit dispositif de sécurité, caractérisé en ce qu'il comprend au moins une résistance montée en parallèle avec ladite au moins une DEL, pour convertir en tension l'énergie lumineuse reçue de ladite au moins une DEL, ladite DEL étant connectée à un moyen pour évaluer ladite tension générée par celle-ci, ledit moyen étant lui-même connecté auxdits moyens de commande logiques, ladite tension indiquant la réponse dudit dispositif de sécurité à un signal envoyé depuis un système extérieur.
  2. Dispositif selon la revendication 1, caractérisé en ce que ledit moyen pour évaluer ladite tension générée par ladite au moins une DEL comporte un amplificateur et un comparateur aptes à comparer ladite tension générée par ladite DEL avec la tension de référence générée par lesdits moyens de commande logiques, afin d'obtenir un signal de différence de tension apte à être envoyé auxdits moyens de commande logiques.
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que ledit amplificateur et ledit comparateur sont connectés à ladite au moins une DEL par l'intermédiaire de moyens de commutation.
  4. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits moyens de commande logiques excitent ladite au moins une DEL par l'intermédiaire d'un organe de puissance.
  5. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins une résistance est intercalée entre ledit tampon de puissance et ladite au moins une DEL et est montée en série avec ladite au moins une DEL.
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comprend un système extérieur apte à assurer la liaison avec ledit périphérique qui contient ledit dispositif de sécurité, ledit système extérieur étant pourvu d'un dispositif optique d'entrée et de sortie apte à communiquer avec ladite au moins une DEL.
  7. Dispositif selon la revendication 6, caractérisé en ce que ledit dispositif optique d'entrée et de sortie dudit système extérieur comporte au moins une DEL ultralumineuse et au moins une photodiode ou un phototransistor.
  8. Dispositif selon la revendication 6, caractérisé en ce que ledit dispositif optique d'entrée et de sortie dudit système extérieur comporte au moins une fibre optique.
  9. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits moyens de commande logiques sont connectés à une mémoire et à un moyen pour gérer ladite au moins une DEL.
  10. Système extérieur pour transmettre un signal optique à une DEL d'un périphérique pourvu d'un dispositif de sécurité selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte un dispositif optique d'entrée et de sortie apte à communiquer de manière bidirectionnelle avec ladite au moins une DEL dudit périphérique.
  11. Système extérieur selon la revendication 10, caractérisé en ce que ledit dispositif optique d'entrée et de sortie comporte au moins une DEL ultralumineuse et au moins une photodiode ou un phototransistor.
  12. Système extérieur selon la revendication 10, caractérisé en ce que ledit dispositif optique d'entrée et de sortie comporte au moins une fibre optique.
  13. Système extérieur selon une ou plusieurs des revendications 10 à 12, caractérisé en ce qu'il est mis mécaniquement en liaison avec ledit périphérique de manière à maintenir ledit dispositif optique d'entrée et de sortie dans une position dans laquelle il est en regard de ladite au moins une DEL dudit périphérique.
  14. Procédé pour réaliser un canal de communication optique entre un dispositif de sécurité d'un périphérique et un système de commande extérieur, caractérisé en ce qu'il comprend les étapes consistant à
       utiliser au moins une DEL dudit dispositif de sécurité dudit périphérique pour recevoir un signal optique envoyé par ledit système extérieur, ladite DEL indiquant l'état de fonctionnement dudit périphérique ;
       convertir ledit signal optique reçu par ladite au moins une DEL en signal de tension, à l'aide d'une résistance montée en parallèle avec ladite au moins une DEL ;
       évaluer ledit signal de tension à l'aide d'un moyen d'évaluation qui est connecté à des moyens de commande logiques aptes à commander ladite au moins une DEL, ledit procédé étant mis en oeuvre dans l'environnement où est installé ledit périphérique.
  15. Procédé selon la revendication 14, caractérisé en ce que l'étape d'évaluation dudit signal de tension comporte l'amplification et la comparaison dudit signal de tension avec une tension de référence envoyée par lesdits moyens de commande logiques ;
  16. Procédé selon la revendication 14, caractérisé en ce qu'il comporte l'étape consistant à connecter ladite au moins une DEL avec un moyen pour évaluer ledit signal de tension par l'intermédiaire d'un moyen de commutation.
EP01919697A 2000-04-11 2001-04-10 Dispositif de securite a communication bidirectionnelle Expired - Lifetime EP1272990B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITPD000084 2000-04-11
IT2000PD000084A IT1315418B1 (it) 2000-04-11 2000-04-11 Dispositivo di sicurezza con comunicazione bidirezionale.
PCT/IB2001/000592 WO2001078026A1 (fr) 2000-04-11 2001-04-10 Dispositif de securite a communication bidirectionnelle

Publications (2)

Publication Number Publication Date
EP1272990A1 EP1272990A1 (fr) 2003-01-08
EP1272990B1 true EP1272990B1 (fr) 2004-06-09

Family

ID=11451908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01919697A Expired - Lifetime EP1272990B1 (fr) 2000-04-11 2001-04-10 Dispositif de securite a communication bidirectionnelle

Country Status (12)

Country Link
EP (1) EP1272990B1 (fr)
AT (1) ATE268930T1 (fr)
AU (1) AU2001246756A1 (fr)
CA (1) CA2405018A1 (fr)
CZ (1) CZ20023375A3 (fr)
DE (1) DE60103749T2 (fr)
DK (1) DK1272990T3 (fr)
ES (1) ES2222987T3 (fr)
IT (1) IT1315418B1 (fr)
NO (1) NO20024895L (fr)
RU (1) RU2002129507A (fr)
WO (1) WO2001078026A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370903A (en) 2001-01-08 2002-07-10 Thorn Security A fire detector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643210B1 (fr) * 1989-02-14 1993-07-02 Michel Ribery Dispositif de signalisation permanente du fonctionnement ou du non-fonctionnement durant sa duree d'utilisation d'un appareil electrique emetteur d'ondes fonctionnant de maniere non continue
FR2672145B1 (fr) * 1991-01-29 1993-05-21 Electricite De France Dispositif de detection d'un defaut d'une lampe d'un feu tricolore et installation de controle du trafic comportant un tel dispositif.
DE19744210A1 (de) * 1997-09-30 1999-04-01 Siemens Ag Verfahren zum Prüfen der Leuchtdioden eines Leuchtdiodenfeldes und Einrichtung zum Durchführen des Verfahrens
DE19754222A1 (de) * 1997-12-06 1999-06-10 Volkswagen Ag Vorrichtung zur Funktionskontrolle von Lumineszenzdioden
DE59911260D1 (de) * 1998-07-23 2005-01-20 Siemens Ag Lichtsignalanlage sowie Verfahren zum Überwachen der Lichtsignalanlage

Also Published As

Publication number Publication date
NO20024895D0 (no) 2002-10-10
DE60103749T2 (de) 2004-10-14
WO2001078026A1 (fr) 2001-10-18
DE60103749D1 (de) 2004-07-15
NO20024895L (no) 2002-10-10
ITPD20000084A1 (it) 2001-10-11
ES2222987T3 (es) 2005-02-16
CZ20023375A3 (cs) 2003-06-18
ATE268930T1 (de) 2004-06-15
DK1272990T3 (da) 2004-07-12
IT1315418B1 (it) 2003-02-10
AU2001246756A1 (en) 2001-10-23
RU2002129507A (ru) 2004-03-10
EP1272990A1 (fr) 2003-01-08
CA2405018A1 (fr) 2001-10-18

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