FR2628559A1 - Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal - Google Patents
Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal Download PDFInfo
- Publication number
- FR2628559A1 FR2628559A1 FR8803015A FR8803015A FR2628559A1 FR 2628559 A1 FR2628559 A1 FR 2628559A1 FR 8803015 A FR8803015 A FR 8803015A FR 8803015 A FR8803015 A FR 8803015A FR 2628559 A1 FR2628559 A1 FR 2628559A1
- Authority
- FR
- France
- Prior art keywords
- remote control
- control device
- radiation
- door
- flap
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2422—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using acoustic or microwave tags
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2451—Specific applications combined with EAS
- G08B13/2454—Checking of authorisation of a person accessing tagged items in an EAS system
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
- G08B13/2468—Antenna in system and the related signal processing
- G08B13/2474—Antenna or antenna activator geometry, arrangement or layout
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C2201/00—Transmission systems of control signals via wireless link
- G08C2201/50—Receiving or transmitting feedback, e.g. replies, status updates, acknowledgements, from the controlled devices
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
DISPOSITIF DE COMMANDE A DISTANCE. REMOTE CONTROL DEVICE.
La presente invention concerne un dispositif de commande a distance simple, peu onereux et susceptible d'être clairement identifié. Elle peut avoir de très nombreuses applications. notamment dans les systèmes de surveillance.The present invention relates to a simple remote control device, inexpensive and capable of being clearly identified. It can have many applications. especially in surveillance systems.
dans tous les systèmes ou une situation a deux états doit être transmise à distance et partout ou un faible encombrement est requis pour l'organe de commande.in all systems where a two-state situation must be transmitted remotely and everywhere where a small footprint is required for the control unit.
treks nombreux systèmes de surveilance et de teletransmission existent dè)a. Ils utilisent de- rayonnements lumineux, des ultrasons, des rayonnements eiectromaanetiaues a hautes fréquences et reconnaissent des echos en mettant le plus souvent en oeuvre l'effet Doppler. treks numerous surveillance and teletransmission systems exist dè) a. They use light radiation, ultrasound, high frequency electromagnetic radiation and recognize echoes by most often implementing the Doppler effect.
Tous ces systèmes sont en wéneral très sensibles d des perturbations indésirables et génerent de nombreuses fausses informations ou fausses alarmes.All these systems are generally very sensitive to undesirable disturbances and generate a lot of false information or false alarms.
D autres systemes de survelllance utilisent les proprietes des diodes micro-ondes de aénèrer des harmoniques des rayonnements quelles reçoivent et permettent de détecter la présence d'un objet porteur d'une telle diode. Ils ne fournissent par contre pas d'autres informations.Other monitoring systems use the properties of microwave diodes to attenuate harmonics of the radiation which they receive and make it possible to detect the presence of an object carrying such a diode. However, they do not provide other information.
Par son principe la présente invention est insensible aux perturbations et apporte une très grande sécurité dans la commande qu'elle envoie et dans son identification.In principle, the present invention is insensitive to disturbances and provides very high security in the command it sends and in its identification.
En outre elle utilise des composants passIf s qui ne demandent aucune énergie et elle envoie ses informations dans l'espace si bien qu'elle ne nécessite ni piles ni fils.In addition it uses passive components that require no energy and sends its information into space so that it requires no batteries or wires.
Enfin son encombrement est très réduit, ce qui facilite son application. Finally its size is very small, which facilitates its application.
L'invention concerne donc un dispositif de commande à distance du type comprenant un ensemble interroaateur émettant un rayonnement et au moins un répondeur comportant des moyens pour engendrer un rayonnement en retour.The invention therefore relates to a remote control device of the type comprising a interroator assembly emitting radiation and at least one answering machine comprising means for generating radiation in return.
caracterisé en ce que ledit répondeur comporte également des moyens pour commander et pour inhiber ledit rayonnement en retour, en ce que ledit rayonnement en retour comporte au moins un harmonique de la fréquence du rayonnement emis par l'ensemble interrogateur et en ce que ledit ensemble interrogateur comporte un récepteur apte â détecter ledit harmonique et å emettre un signal d'utilisation reprèsentatif de l'état de commande du re?ondeur. characterized in that said responder also comprises means for controlling and inhibiting said radiation in return, in that said radiation in return comprises at least one harmonic of the frequency of the radiation emitted by the interrogator unit and in that said interrogator unit comprises a receiver capable of detecting said harmonic and of emitting a signal of use representative of the control state of the rewoofer.
Des modes de réalisation de l'invention seront décrits ci- apures, à titre d'exemples non limitatifs, avec réference aux dessins annexes dans lesquels
La figure 1 est une représentation shèmatique d'une liaison comportant un dispositif de réponse à distance utilisant une diode micro-ondes, selon l'art antérieur,
La figure 2 est une représentation schematique d'un moce de réalisation du dispositif de commande selon l'invention, avec une réponse du type oui, non,
La figure 3 est une représentation schématique d'une variante de réalisation du dispositif de commande de la figure 2, avec une réponse du type oui, non,
La figure 4 est une représentation schématique d'une application du dispositif selon l'invention a un système de surveillance,
La figure 5 illustre un détail dé l'application de la.Embodiments of the invention will be described below, by way of nonlimiting examples, with reference to the accompanying drawings in which
FIG. 1 is a schematic representation of a link comprising a remote response device using a microwave diode, according to the prior art,
FIG. 2 is a diagrammatic representation of an embodiment of the control device according to the invention, with a response of the yes, no type,
FIG. 3 is a schematic representation of an alternative embodiment of the control device of FIG. 2, with a response of the yes, no type,
FIG. 4 is a schematic representation of an application of the device according to the invention to a monitoring system,
Figure 5 illustrates a detail of the application of the.
figure 4,
La figure 6 est une variante du détail de la figure 5, a figure 7 est une représentation schématique d'un mode de réalisation du dispositif de la figure 3, avec une commande codée, et
La figure 8 est une variante du dispositif de la figure 7 avec codage électrique ou électronique.figure 4,
FIG. 6 is a variant of the detail of FIG. 5, FIG. 7 is a schematic representation of an embodiment of the device of FIG. 3, with a coded command, and
Figure 8 is a variant of the device of Figure 7 with electrical or electronic coding.
Tel que représentée sur la figure 1, un dispositif de liaison selon l'art anterieur' comprend généralement - un émetteur 1, capable d'émettre, dans une âne d lnf'uenco 5. un rayonnement électromagnétique 2 a une frecuence F.As shown in Figure 1, a connecting device according to the prior art 'generally comprises - a transmitter 1, capable of transmitting, in a donkey lnf'uenco 5. electromagnetic radiation 2 has a frequency F.
- un ou plusieurs répondeurs 3 capables de recevoIr le rayonnement 1 et de le transformer pour le réémettre, 4, de telle sorte que ledit rayonnement réémis 4 comporte au moins un harmonique de la fréquence F du rayonnement reçu et de préférence le deuxième harmonique, et ceci, grace a une diode micro-ondes 7.- one or more responders 3 capable of receiving radiation 1 and transforming it to re-emit it, 4, so that said re-emitted radiation 4 comprises at least one harmonic of the frequency F of the radiation received and preferably the second harmonic, and this, thanks to a microwave diode 7.
- un récepteur 6, capable de détecter au moins l'un des harmoniques réémis par le répondeur 3, ledit reepteur étant préférentiellement, mais non obligatoirement, solidaire de l'émetteur 1.- A receiver 6, capable of detecting at least one of the harmonics re-emitted by the responder 3, said receiver being preferably, but not necessarily, secured to the transmitter 1.
Le fonctionnement du dispositif est le suivant
Si l'émetteur 1 est en action, dés qu'un répondeur 3 est prësent dans la zone d'influence 5, il reçoit le rayonnement 2 et renvoi un écho comportant un harmonique de la fréquence de l'éjetteur. Le récepteur 6 détecte la presence de cet harmonique et signale ainsi la présence du répondeur 3 dans la zône d'influence 5.The operation of the device is as follows
If the transmitter 1 is in action, as soon as an answering machine 3 is present in the zone of influence 5, it receives the radiation 2 and sends back an echo comprising a harmonic of the frequency of the transmitter. The receiver 6 detects the presence of this harmonic and thus signals the presence of the responder 3 in the influence zone 5.
La figure 2 illustre le principe de fonctionnement du dispositif de commande selon l'invention capable d'utiliser la position d'un élément mobile pour envoyer une information. FIG. 2 illustrates the operating principle of the control device according to the invention capable of using the position of a mobile element to send information.
Pour cela, le répondeur 3, comportant la diode micro-ondes 7, est placé dans une enceinte Brayant un orifice 9. Ladite enceinte 8 est réalisée en un matériau opaque au rayonnement de l'émetteur 1. L'élément dont on veut connaitre la position comporte un volet 10, lui aussi en matériau opaque au rayonnement de l'émetteur 1, placé de telle sorte que, suivant la position dudit élément, ii occulte ou non l'orifice 9 et ainsi interrompe ou non la réémission par le répondeur 3 de l'harmonique du rayonnement de l'émetteur 1. For this, the responder 3, comprising the microwave diode 7, is placed in an enclosure Brayant an orifice 9. Said enclosure 8 is made of a material opaque to the radiation of the transmitter 1. The element whose we want to know position includes a flap 10, also made of material opaque to the radiation from the transmitter 1, placed so that, depending on the position of said element, it obscures or not the orifice 9 and thus interrupts or not the retransmission by the responder 3 of the harmonic of the radiation of the transmitter 1.
a figure 3 montre une variante de la réalisatior precédente ou le rayonnement réémis par la diode à micro- ondes est commande par un interrupteur 27, électrique ou électronique, qui vient court-circuiter ou non ladite diode 7 et qui est lui même commandé par l'élément dont position constitue l'information de commande. Figure 3 shows a variant of the previous embodiment where the radiation re-emitted by the microwave diode is controlled by a switch 27, electric or electronic, which short-circuits or not the said diode 7 and which is itself controlled by the element whose position constitutes the control information.
figure 4 illustre l'utilisation du dispositif selon 1 'Inventlon dans un système de surveillance. Un émetteur est placé dans une pièce 11 à surveller et qui comprend par exemple deux portes ,2 et t3, s'ouvrant dans deux c,ambranles 14 et 15. FIG. 4 illustrates the use of the device according to the Inventlon in a surveillance system. A transmitter is placed in a room 11 to be overflown and which comprises for example two doors, 2 and t3, opening in two c, ambranles 14 and 15.
Ces portes sont munies chacune d'un répondeur 3 placé dans une enceinte 8 ouverte sur l'extérieur par un orifice 9, ainsi que le montre la figure 5.These doors are each provided with an answering machine 3 placed in an enclosure 8 open to the outside through an orifice 9, as shown in FIG. 5.
L'enceinte 8 est fixée sur une feuillure 17 de la porte 12 qui est face a une partie 18 du chambranle 14 lorsque ladite porte 12 est fermee, de telle sorte qu'une plaque 16, en matériau opaque au rayonnement de l'émetteur fixée sur ladite partie 18 du chambranle, vienne occulter l'orifice 9 et empeche le répondeur 3 de recevoir le.The enclosure 8 is fixed to a rabbet 17 of the door 12 which faces a part 18 of the jamb 14 when said door 12 is closed, so that a plate 16, made of material opaque to the radiation of the fixed transmitter on said part 18 of the doorframe, obscures the orifice 9 and prevents the answering machine 3 from receiving the.
rayonnement et de réémettre l'harmonique dudit rayonnement.radiation and re-emitting the harmonic of said radiation.
Dés que la porte quitte le chambranle, l'orifice 9 est démasqué et le répondeur signale sa présence en renvoyant l'harmonique du signal qu'lu reçoit.As soon as the door leaves the doorframe, the orifice 9 is unmasked and the answering machine signals its presence by returning the harmonic of the signal it receives.
La figure 6 illustre un perfectionnement au dispositif precedent ou le répondeur 3 est place sur un coin 19 de la porte 12, formé par la feuillure 17 et par une face 26 de ladite porte 12, de façon à ce qu'il soit impossible de masquer l'orifice 9 en intercalant une plaque de matériau opaque au rayonnement entre la porte et le chambranle.Figure 6 illustrates an improvement to the previous device where the responder 3 is placed on a corner 19 of the door 12, formed by the rebate 17 and by a face 26 of said door 12, so that it is impossible to hide the orifice 9 by inserting a plate of material opaque to radiation between the door and the jamb.
Pour cela, le répondeur 3 est muni de deux orifices 20,
Places chacun sur l'un des cotés du coin 19, et le chambranle 14 comporte un volet 21 en forme de coln venant couvrir les deu > parties de l orifice 20, le coi dudit voiet 21 comportant lui-même un creux 22 destiné à interdire de glisser une feuille de matériau opaque autour du coin, ledit creux pouvant être prolongé sur une grande longueur du chambranle. For this, the responder 3 is provided with two orifices 20,
Places each on one of the sides of the corner 19, and the jamb 14 has a flap 21 in the shape of a coln coming to cover the two> parts of the orifice 20, the core of said voiet 21 itself comprising a hollow 22 intended to prohibit sliding a sheet of opaque material around the corner, said recess being able to be extended over a long length of the jamb.
Bien entendu, dans cette application des figures 4. 5 et 6, les positions respectives du répondeur 3 sur la feuillure 17 et du volet 16 ou 21 sur le chambranle 14 peuvent être inverses sans inconvénient.Of course, in this application of FIGS. 4, 5 and 6, the respective positions of the responder 3 on the rebate 17 and of the flap 16 or 21 on the jamb 14 can be reversed without disadvantage.
est évident cue le dispositif de la figure 3, utilisant un interrupteur électrique ou électronique au lieu d'un volet peut être utilisé dans l'application de la figure 4 avec de très nombreuses variantes. is obvious cue the device of Figure 3, using an electric or electronic switch instead of a shutter can be used in the application of Figure 4 with many variations.
La figure 7 illustre un dispositif de commande selon l'invéntion capable démettre une commande codée. Pour cela, l'enceinte 8 du répondeur 3 est munie d'un orifice réalisé sous forme d'une fente fine 23. Un volet 24, en matériau opaque au rayonnement, est percé lui aussi d fentes 25 espacées de façon b réaliser un codage qui est semis lorsque le volet est deplacé devant la fente 23.FIG. 7 illustrates a control device according to the invention capable of transmitting a coded command. For this, the enclosure 8 of the answering machine 3 is provided with an orifice produced in the form of a fine slot 23. A flap 24, made of material opaque to radiation, is also pierced with slots 25 spaced apart so as to carry out coding which is sown when the flap is moved in front of the slot 23.
La figure B illustre une variante du dispositif précédent ou le volet a fentes codées 24 est remplace par un codeur électrique ou électronique 28 qui commande un interrupteur 29 capable d'inihiber ou non la diode à micro-onde 7.FIG. B illustrates a variant of the previous device where the shutter with coded slots 24 is replaced by an electric or electronic encoder 28 which controls a switch 29 capable of inhibiting or not the microwave diode 7.
Les dispositifs des figures 7 et 8 peuvent être utllisés, par exemple, pour télécommander l'ouverture de portes de voiture, d'appartements ou de -garages. Dans ce cas l'utilisateur est muni d'un répondeur du type des figures 7 ou 8 dont il peut manoeuvrer le volet 24 ou le codeur 28 dans le rayonnement d'un émetteur 1 placé dans un véhicule ou encore derrière une porte à ouvrir. The devices of Figures 7 and 8 can be used, for example, to remote control the opening of car doors, apartments or garages. In this case, the user is provided with a responder of the type of FIGS. 7 or 8, of which he can operate the shutter 24 or the encoder 28 in the radiation of a transmitter 1 placed in a vehicle or even behind a door to be opened.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8803015A FR2628559A1 (en) | 1988-03-09 | 1988-03-09 | Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8803015A FR2628559A1 (en) | 1988-03-09 | 1988-03-09 | Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2628559A1 true FR2628559A1 (en) | 1989-09-15 |
Family
ID=9364077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8803015A Withdrawn FR2628559A1 (en) | 1988-03-09 | 1988-03-09 | Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2628559A1 (en) |
-
1988
- 1988-03-09 FR FR8803015A patent/FR2628559A1/en not_active Withdrawn
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5912619A (en) | Security system using optical sensors | |
US5925861A (en) | Security door lock arrangement with magnetically operated switch in the closed door position | |
CA2629047C (en) | Exit alarm escutcheon | |
EP0596805A1 (en) | Remote control system for locking and unlocking doors and opening parts of a motor vehicle | |
EP1851744B1 (en) | Smoke detector | |
FR3052902B1 (en) | ALARM SENSOR, SYSTEM COMPRISING SUCH SENSOR, AND METHOD OF USING SAID ALARM SYSTEM | |
FR2720519A1 (en) | Metal detector integrated in combination with a transponder detector for access control. | |
EP1030011B1 (en) | Clutch device for a lock exterior handle and its movable bolt | |
EP0600795B1 (en) | Bolt arrangement with a detecting device for the closed position of the bolt | |
FR2628559A1 (en) | Remote control and monitoring system - has transmitted ray responded to by harmonic of ray which provides confirmation of reception of command signal | |
EP3652403A1 (en) | Radiofrequency device for a home automation closure or protection facility, and associated home automation facility | |
EP2062237B1 (en) | Detector of attempt to breach a lock, lock, door and alarm system comprising such a detector | |
FR2626098A1 (en) | Remote control device | |
EP1764460B1 (en) | Conditionally operated electromechanical lock | |
EP2304142B1 (en) | Anti-theft system including a magnetic-field-sensitive element | |
BE1027339B1 (en) | DOOR LOCKING SYSTEM | |
WO2002081853A1 (en) | Controlled access device and corresponding installation | |
US2322815A (en) | Combined lock and alarm for windows and the like | |
FR2573893A1 (en) | Method and devices for triggering an alarm or an automatic unit while avoiding untimely triggering | |
WO1996020326A1 (en) | Self-protected closing device for preventing the theft of objects in enclosed spaces | |
WO1992012503A1 (en) | DEVICE FOR PROTECTING OBJECTS, IN PARTICULAR $i(OBJETS D'ART) | |
FR3023405A1 (en) | METHOD FOR OPERATING AN ALARM SYSTEM AND / OR DOMOTICS AND PORTABLE ELECTRONIC DEVICE | |
US9741219B1 (en) | Tamper-proof building alarm system | |
FR2892549A1 (en) | Alarm system for protecting e.g. portable computer, has central processing unit comprising casing sensor integrally mounted in case, and alarm module for controlling transmission of alarm signals | |
FR2720095A1 (en) | Centralised control system for multiple electronically operated locks |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |