EP2113896A1 - Detection unit protected against removal and/or theft and system comprising at least one such unit. - Google Patents

Detection unit protected against removal and/or theft and system comprising at least one such unit. Download PDF

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Publication number
EP2113896A1
EP2113896A1 EP09305376A EP09305376A EP2113896A1 EP 2113896 A1 EP2113896 A1 EP 2113896A1 EP 09305376 A EP09305376 A EP 09305376A EP 09305376 A EP09305376 A EP 09305376A EP 2113896 A1 EP2113896 A1 EP 2113896A1
Authority
EP
European Patent Office
Prior art keywords
unit
housing
unit according
inclinometer
electrode
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.)
Granted
Application number
EP09305376A
Other languages
German (de)
French (fr)
Other versions
EP2113896A8 (en
EP2113896B1 (en
Inventor
Jean-Michel Reibel
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.)
Radio Systemes Ingenierie Video Technologies (soci
Original Assignee
Radio Systemes Ingenierie SA
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
Priority claimed from FR0852867A external-priority patent/FR2930666B1/en
Priority claimed from FR0854735A external-priority patent/FR2933797B1/en
Application filed by Radio Systemes Ingenierie SA filed Critical Radio Systemes Ingenierie SA
Priority to PL09305376T priority Critical patent/PL2113896T3/en
Publication of EP2113896A1 publication Critical patent/EP2113896A1/en
Publication of EP2113896A8 publication Critical patent/EP2113896A8/en
Application granted granted Critical
Publication of EP2113896B1 publication Critical patent/EP2113896B1/en
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1472—Mechanical actuation by lifting or attempted removal of hand-portable articles with force or weight detection
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/149—Mechanical actuation by lifting or attempted removal of hand-portable articles with electric, magnetic, capacitive switch actuation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Definitions

  • the present invention relates to the field of security systems, alarm and / or surveillance, and relates to a detection unit protected against tearing and / or breaking and a system of the aforementioned type comprising at least one such unit.
  • the detectors currently used in security, surveillance or alarm systems are generally protected against tearing (from the wall bracket) and / or against the opening of the housing which encloses them.
  • one or more protective contacts are kept activated. If an opening or tearing occurs, corresponding contacts cause a signal to be sent to the system central (signal may be a loop break on a wired system, or the transmission of a radio message in a system without wire).
  • FIGS. 1 to 3 are respectively side, rear and sectional views of a detector of the aforementioned type, which comprises a cover or a rear housing part which allows the wall attachment.
  • This cover or this rear part has fixing holes, allowing attachment in an angle, or on a flat surface.
  • holes corresponding to the angle fixing and the flat fixing are performed in a weakened area of the rear cover.
  • This weakened zone has on its inner face a boss that presses a contact that remains activated as long as the housing remains closed and the detector remains attached to the wall.
  • the sensors of the type external cameras are often fixed at the end of an arm, via a ball that allows the pointing of the camera (and, in the case mentioned above, the associated motion detector), in order to be able to precisely adjust the area to watch.
  • the detector assembly or the camera is no longer in close connection with the wall support (or its equivalent, such as a mast for example).
  • the tearing can then be performed no longer at the camera, but the attachment of the arm on the wall, it is no longer detectable except to implement complex solutions to achieve.
  • the object of the present invention is to overcome the abovementioned limitation in a simple manner, this preferably by making it possible to overcome any direct or physical link between the support and the detector.
  • the figures 4 and 5 show a detection unit 1 integrating at least one motion detector, a presence detector, a camera or a combination of at least two such devices, in particular as part of a security system, alarm and / or the functional elements 3 of said unit 1 being housed in a housing 2 fixed to a wall ( figure 5 ), a mast, a roof or the like, in particular by means of a fastening accessory 4, in particular of the articulated arm type or the like (for example, a spherical support arm as shown in FIG. figure 4 ).
  • the detection unit 1 also comprises means 5 capable of measuring a variation of the absolute angle with respect to the vertical of a reference surface of the casing 2, of a part of the casing 2, of at least one internal functional element or a group of such internal functional elements 3, and to deliver a measurement signal that can be used by the unit 1 and / or the system to which said unit 1 belongs, a storage means of a reference angular position relative to the vertical, for example acquired during the installation of the unit 1 (any inclination with respect to the vertical being possible), and a means for comparing the difference between the value measured by the means 5 and this reference value, with a threshold value for triggering signaling to the system.
  • the invention allows a simple way to achieve the above purpose, without causing significant constructive change.
  • the detection unit 1 having been originally installed with an orientation or an initial or reference pointing, any manipulation of said unit 1 which causes an (unwanted) change of orientation of the means 5 beyond a pre-set threshold value, causes the generating an alarm or a warning informing the central unit of an attempt to neutralize or deteriorate the unit 1, in particular a displacement thereof, whether voluntary or accidental.
  • the storage means and the comparison means may, for example, be provided by an integrated circuit 8 of the memory or microcontroller microprocessor type, mounted in the housing 2 and forming part of the functional element group 3 of the unit 1.
  • the abovementioned comparison means may be in the form of a hardware circuit or may be provided in the form of a software function performed by the integrated circuit 8.
  • the means 5 can provide a measurement of the absolute value of the orientation (and therefore of its variation) directly of the difference between the reference and the current position, to the integrated circuit 8.
  • the measuring means 5 can also be integrated in the integrated circuit 8 (see FIG. figure 5 ) thereby forming a dedicated hybrid circuit 5, 8.
  • the measurement signal supplied by the means 5 can be operated by the unit 1 itself, which will then transmit an alarm signal if necessary to the central unit of the system, or be transmitted (as it is or after preprocessing) to this unit. last for its exploitation.
  • the unit 1 stores an angular position consecutive to the installation, and compares the following measurements with this reference value. A threshold corresponding to the maximum deviation tolerated will determine when the signaling is actually triggered.
  • the means 5 capable of measuring a variation of the absolute angle relative to the vertical comprises or consists of an inclinometer associated with a reference surface forming part of the unit 1 , the housing 2 or a functional element 3 forming part of one or one of the devices of the detector or camera type.
  • the means 5 is advantageously mounted on a portion of the housing 2 or on a support of a group of functional elements 3, such as an electronic card 3 ', necessarily undergoing, in case of opening of the housing 2, a displacement or a movement generating a change in its angular orientation, in particular a rotational movement or pivoting.
  • the means of the inclinometer type 5 consists of an integrated circuit integrating a signal conditioning electronics delivered by a sensitive element in the form of a microsystem machined on silicon and consisting of a Capacitive comb deforming under the action of gravity.
  • the means of the inclinometer type 5 consists of a two-axis accelerometer, in particular of the MEMS type.
  • the inclinometer 5 of the two-axis accelerometer type provides a measurement signal with a DC component corresponding to the terrestrial attraction and an AC component allowing, when its value exceeds a predetermined threshold, the detection of vibrations and / or displacements. brutal reference surface associated with said inclinometer 5.
  • Such an embodiment of the inclinometer allows a more universal detection of the manipulations of the unit 1 concerned.
  • the sign of the signal supplied by the accelerometer can be exploited, for example by the microprocessor 8 to determine if the camera forming the unit 1 ( figure 4 ) or integrated in Unit 1 ( figure 5 ) is arranged "head up” (as on the figure 4 ) or "upside down” (suspended camera). This function can, if necessary, restore an image to the place by providing an inverted output signal or "mirror".
  • the unit 1 may comprise, in addition to the inclinometer 5, one or more other means (s) of protection or security as indicated below.
  • the inclinometer 5 in the form of an integrated circuit can be mounted as an additional component on the printed circuit board carrying the components performing the other functions of the detection unit 1.
  • the latter can then have both an embodiment as shown on the Figures 1 to 3 (with the pre-cut zones or lines of weakening less, as well as possibly the contact), that an embodiment such as emerging from the figure 4 (articulated arm mounting).
  • the unit 1 may also comprise a sensor 6 enabling the determination of the orientation of the earth's magnetic field and capable of providing an indication of the orientation of a detection or detection device. directional viewing of said unit 1 or the latter itself, said sensor 6 possibly being a magneto-resistive sensor.
  • an alternative embodiment of the invention provides that the unit 1 also comprises a means 7 for determining the height of said unit 1 relative to the ground or to a reference surface, for example in the form of an ultrasonic sensor, a pressure sensor or the like (for example a GPS device).
  • a means 7 for determining the height of said unit 1 relative to the ground or to a reference surface for example in the form of an ultrasonic sensor, a pressure sensor or the like (for example a GPS device).
  • Another variant embodiment can provide for detecting the height change by exploiting the AC component of the measurement signal supplied by the inclinometer 5 of the aforementioned accelerometer type.
  • the angular measurement is performed intermittently to reduce the power consumption of the system and especially the unit 1, especially when the latter operates autonomously using batteries or batteries.
  • the means 5 is activated intermittently.
  • the present invention also proposes, in particular in connection with the embodiment shown on the figure 5 , to reinforce the protection of a unit as mentioned above against tearing (especially in case of attachment to a wall 13 or a similar support) and / or against the unauthorized opening of the housing 2, for example by separating the constituent parts 2 'and 2 "of the latter.
  • the unit 1 also comprises, among its functional elements 3, at least one means 9 able to measure a variation of capacitance between at least two pieces forming electrodes 10 or between at least one piece forming an electrode And a mass, virtual or real, of said unit 1, said one or more electrodes 10 being located on or inside the housing 2 in a location protected from the unintentional or unintentional approach of an object, element, body or analog likely to influence or modify a load or field electrical means, said means 10 delivering a measurement signal, exceeding or incident usable by the unit 1 and / or by the system to which said unit 1 belongs and forming in association with said at least one electrode 10 a proximity detector of capacitive type.
  • the triggering of a warning indicating an incident affecting the safety of the unit 1 may occur either at the time of contact with the or one of the electrodes 10, or already in an approach phase of this electrode 10, before any physical contact with the latter.
  • the warning is triggered, of course, also in the event of a break in the connection or electrical connection between the electrode (s) 10 and the means 9.
  • the type of signal delivered by the means 9 (measurement, overshoot, warning) will depend on the operating mode of the system to which said unit 1 belongs, the sophistication of the means 9 (analog or digital circuit), the type of link existing between the unit 1 concerned and the central system and the type of power supply of said unit 1, which determines its activity and its energy autonomy.
  • the means 9 can consist either of a simple measuring circuit or of a measurement and evaluation circuit.
  • the means 9, associated with said at least one electrode 10 to form a proximity detector is chosen from the group formed by the RC time-shift detector circuits, with phase shift. , with frequency modulation and amplitude modulation.
  • capacitive type proximity sensors are known in particular from the company Freescale Semiconductors (registered name).
  • the means 9 may be, as indicated above, in the form of a circuit independently mounted on a card or a printed circuit 3 ', or possibly be integrated in a hybrid circuit also incorporating the microprocessor 8 and the inclinometer 5.
  • one or at least one electrode (s) 10 consists of a conductive part of assembly or attachment of the protective housing 3, preferably a metal part, such as for example a screw or the like.
  • the figure 5 simultaneously illustrates an assembly screw and (in dotted line) a fixing screw, each capable of forming an electrode 10.
  • each removable assembly or fixing piece 10 forming an electrode is mounted in a nut 14, a threaded socket or a similar mounting site electrically connected to the means measurement 9, the connection between said electrode 10 and said measuring means 9 being established only after complete or definitive assembly of the corresponding part 10.
  • the nut 14 can for example be presented, as shown in FIG. figure 5 , in the form of a folded sheet metal nut secured to the printed circuit (soldered or crimped) and which is electrically connected directly to a measuring input of the means 9.
  • said at least one electrode 10 is mounted at a recess or similar reentrant deformation 11 of the protective case 2.
  • the electrode or each electrode 10, in the form of assembly or fixing means is housed at the bottom of a well-shaped deformation 11 of a constituent part 2 ', 2 "of the protective case 2.
  • At least one electrode 10 it may further be provided that one or at least one electrode 10 is located at a location in the protective housing 2 which is remote from the wall 12 of the latter, in particular accessible wall portions and apparent in the installed state of said unit 1 (see electrode 10 shown in broken lines on the printed circuit 3 'of the figure 5 ).
  • the electrode 10 or at least one electrode 10 consists of a means of detecting the presence of the end of an assembly screw, this means in the form of a portion strip or track of the printed circuit 3 'bearing the elements or functional components 3 of said unit 1, connected to the means 9.
  • the area of the printed circuit 3 'receiving the nut 14 may be surrounded by a track located at a reduced distance and which is connected to the measuring input of the means 2.
  • the first variant described above (screw 10 directly connected electrode) delivers a very strong signal level, but is likely to increase the susceptibility of the electronics, especially in case of electrostatic discharge, unlike the last variant above wherein the track surrounding the nut 14 forms a capacitor with the nut.
  • the signal level is greatly reduced, but the risk of electrostatic discharge is also greatly reduced.
  • the choice of one or the other variant may depend on the end use (and the associated environment).
  • the patella used to adjust the pointing of the unit 1 when the patella used to adjust the pointing of the unit 1 is insufficiently blocked, its orientation can be disrupted without malicious action. This can occur under the weight of the snow accumulated on the housing 2, or when a bird comes to rest on it. The adjustment is then detected by the vertical angle change.
  • the additional features of the invention make it possible to guarantee a reinforced protection of the unit 1 against tearing and / or against an unauthorized opening of its protective case 2.
  • the present invention also relates to a security, alarm and / or surveillance system comprising a central unit and at least one peripheral unit, characterized in that said or each peripheral unit consists of a detection unit 1 as described above.

Abstract

The detection unit (1) has an inclinometer (5) that can measure variation of the absolute angle relative to the vertical line of reference surface of the housing (2), a portion of housing and a group of internal functional elements (3), and can deliver a measuring signal that can be exploited by the detection unit. An integrated circuit (8) stores an angular reference position relative to the vertical line. The integrated circuit compares the difference between the value measured by the inclinometer and the reference value, with a threshold value for triggering the signaling to the system.

Description

La présente invention concerne le domaine des systèmes de sécurité, d'alarme et/ou de surveillance, et a pour objet une unité de détection protégée contre l'arrachement et/ou l'effraction et un système du type précité comprenant au moins une telle unité.The present invention relates to the field of security systems, alarm and / or surveillance, and relates to a detection unit protected against tearing and / or breaking and a system of the aforementioned type comprising at least one such unit.

Les détecteurs utilisés actuellement dans les systèmes de sécurité, de surveillance ou d'alarme, sont généralement protégés contre l'arrachement (du support mural) et/ou contre l'ouverture du boîtier qui les renferme.The detectors currently used in security, surveillance or alarm systems are generally protected against tearing (from the wall bracket) and / or against the opening of the housing which encloses them.

Sur ces produits connus, à l'état nominal (produit fixé et fermé), un ou plusieurs contacts de protection sont maintenus activés. Si une ouverture ou un arrachement intervient, des contacts correspondants entraînent l'envoi d'un signal vers la centrale du système (signal pouvant être une rupture de boucle sur un système câblé, ou l'émission d'un message radio dans un système sans fil).On these known products, in the nominal state (fixed and closed product), one or more protective contacts are kept activated. If an opening or tearing occurs, corresponding contacts cause a signal to be sent to the system central (signal may be a loop break on a wired system, or the transmission of a radio message in a system without wire).

Parmi les détecteurs connus actuellement, il existe notamment des associations détecteur de mouvement ou de présence/caméra vidéo, CCD ou autre, qui filment la zone protégée uniquement en cas de détection par le détecteur.Among the currently known detectors, there exist in particular motion detector or presence / video camera, CCD or other associations, which film the protected area only in case of detection by the detector.

Les figures 1 à 3 sont des vues respectivement de côté, de derrière et en coupe d'un détecteur du type précité, qui comporte un couvercle ou une partie de boîtier en face arrière qui permet la fixation murale.The Figures 1 to 3 are respectively side, rear and sectional views of a detector of the aforementioned type, which comprises a cover or a rear housing part which allows the wall attachment.

Ce couvercle ou cette partie arrière présente des trous de fixation, permettant la fixation dans un angle, ou sur une surface plane.This cover or this rear part has fixing holes, allowing attachment in an angle, or on a flat surface.

Dans un mode de réalisation connu, des trous correspondant à la fixation en angle et à la fixation à plat sont effectués dans une zone fragilisée du couvercle arrière. Cette zone fragilisée comporte sur sa face interne un bossage qui vient appuyer sur un contact qui reste donc activé tant que le boîtier reste fermé et que le détecteur reste fixé au mur.In a known embodiment, holes corresponding to the angle fixing and the flat fixing are performed in a weakened area of the rear cover. This weakened zone has on its inner face a boss that presses a contact that remains activated as long as the housing remains closed and the detector remains attached to the wall.

De cette manière, un arrachement du détecteur provoquera la cassure de la zone fragilisée qui restera attachée au mur. De la même manière, une ouverture du boîtier conduira au relâchement et à la désactivation du contact.In this way, a detachment of the detector will cause the breakage of the weakened zone that will remain attached to the wall. In the same way, an opening of the housing will lead to the release and deactivation of the contact.

Dans une déclinaison de ces détecteurs destinée à un usage extérieur, se pose le problème supplémentaire lié aux accessoires de fixation.In a declination of these detectors intended for outdoor use, there is the additional problem related to fixing accessories.

En effet, les détecteurs du type caméras extérieures sont souvent fixés au bout d'un bras, via une rotule qui permet le pointage de la caméra (et, dans le cas précité, du détecteur de mouvement associé), afin de pouvoir régler précisément la zone à surveiller.Indeed, the sensors of the type external cameras are often fixed at the end of an arm, via a ball that allows the pointing of the camera (and, in the case mentioned above, the associated motion detector), in order to be able to precisely adjust the area to watch.

Dans ce type d'installation, l'ensemble détecteur ou la caméra n'est plus en liaison étroite avec le support mural (ou son équivalent, comme un mât par exemple).In this type of installation, the detector assembly or the camera is no longer in close connection with the wall support (or its equivalent, such as a mast for example).

L'arrachement pouvant alors être réalisé non plus au niveau de la caméra, mais à la fixation du bras sur le mur, il n'est plus détectable sauf à mettre en oeuvre des solutions complexes à réaliser.The tearing can then be performed no longer at the camera, but the attachment of the arm on the wall, it is no longer detectable except to implement complex solutions to achieve.

En outre, un déréglage (qu'il soit involontaire ou malveillant) au niveau de la rotule, ou un dévissage de la platine de fixation du bras n'est pas non plus détecté, ni signalé.In addition, a maladjustment (whether involuntary or malicious) at the patella, or unscrewing of the arm mounting plate is also not detected or reported.

La présente invention a pour but de surmonter la limitation précitée de manière simple, ce en permettant préférentiellement de s'affranchir de tout lien direct ou physique entre le support et le détecteur.The object of the present invention is to overcome the abovementioned limitation in a simple manner, this preferably by making it possible to overcome any direct or physical link between the support and the detector.

A cet effet, l'invention a pour objet une unité de détection intégrant au moins un détecteur de mouvements, un détecteur de présence, une caméra ou une combinaison d'au moins deux tels dispositifs, notamment en tant que composante d'un système de sécurité, d'alarme et/ou de surveillance, les éléments fonctionnels de ladite unité étant logés dans un boîtier fixé à un mur, un mât, une toiture ou analogue, notamment par l'intermédiaire d'un accessoire de fixation, en particulier du type bras articulé ou analogue, unité caractérisée en ce qu'elle comprend également :

  • un moyen apte à mesurer une variation de l'angle absolu par rapport à la verticale d'une surface de référence du boîtier, d'une partie du boîtier, d'au moins un élément fonctionnel interne ou d'un groupement de tels éléments fonctionnels internes, et à délivrer un signal de mesure exploitable par l'unité et/ou le système auquel appartient ladite unité,
  • un moyen de mémorisation d'une position angulaire de référence par rapport à la verticale, par exemple acquise lors de l'installation de l'unité, et,
  • un moyen de comparaison de la différence entre la valeur mesurée par le moyen et cette valeur de référence, avec une valeur seuil de déclenchement de la signalisation au système.
For this purpose, the subject of the invention is a detection unit integrating at least one motion detector, a presence detector, a camera or a combination of at least two such devices, in particular as a component of a control system. safety, alarm and / or surveillance, the functional elements of said unit being housed in a housing fixed to a wall, a mast, a roof or the like, in particular via a fixing accessory, in particular the type articulated arm or the like, unit characterized in that it also comprises:
  • means capable of measuring a variation of the absolute angle with respect to the vertical of a reference surface of the housing, a part of the housing, at least one internal functional element or a grouping of such functional elements internal, and to deliver a measurement signal usable by the unit and / or the system to which said unit belongs,
  • means for storing a reference angular position with respect to the vertical, for example acquired during the installation of the unit, and,
  • means for comparing the difference between the value measured by the means and this reference value, with a threshold value for triggering the signaling to the system.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels les figures 4 et 5 sont des représentations schématiques, vues en coupe transversale ou par transparence, d'une unité de détection selon deux modes de réalisation de l'invention.The invention will be better understood, thanks to the following description, which relates to a preferred embodiment, given by way of non-limiting example, and explained with reference to the attached schematic drawings, in which the figures 4 and 5 are schematic representations, seen in cross section or by transparency, of a detection unit according to two embodiments of the invention.

Les figures 4 et 5 montrent une unité de détection 1 intégrant au moins un détecteur de mouvements, un détecteur de présence, une caméra ou une combinaison d'au moins deux tels dispositifs, notamment en tant que composante d'un système de sécurité, d'alarme et/ou de surveillance, les éléments fonctionnels 3 de ladite unité 1 étant logés dans un boîtier 2 fixé à un mur (figure 5), un mât, une toiture ou analogue, notamment par l'intermédiaire d'un accessoire de fixation 4, en particulier du type bras articulé ou analogue (bras support à rotule par exemple comme le montre la figure 4).The figures 4 and 5 show a detection unit 1 integrating at least one motion detector, a presence detector, a camera or a combination of at least two such devices, in particular as part of a security system, alarm and / or the functional elements 3 of said unit 1 being housed in a housing 2 fixed to a wall ( figure 5 ), a mast, a roof or the like, in particular by means of a fastening accessory 4, in particular of the articulated arm type or the like (for example, a spherical support arm as shown in FIG. figure 4 ).

Conformément à l'invention, l'unité de détection 1 comprend également un moyen 5 apte à mesurer une variation de l'angle absolu par rapport à la verticale d'une surface de référence du boîtier 2, d'une partie du boîtier 2, d'au moins un élément fonctionnel interne ou d'un groupement de tels éléments fonctionnels internes 3, et à délivrer un signal de mesure exploitable par l'unité 1 et/ou le système auquel appartient ladite unité 1, un moyen de mémorisation d'une position angulaire de référence par rapport à la verticale, par exemple acquise lors de l'installation de l'unité 1 (toute inclinaison par rapport à la verticale étant possible), et un moyen de comparaison de la différence entre la valeur mesurée par le moyen 5 et cette valeur de référence, avec une valeur seuil de déclenchement de la signalisation au système.According to the invention, the detection unit 1 also comprises means 5 capable of measuring a variation of the absolute angle with respect to the vertical of a reference surface of the casing 2, of a part of the casing 2, of at least one internal functional element or a group of such internal functional elements 3, and to deliver a measurement signal that can be used by the unit 1 and / or the system to which said unit 1 belongs, a storage means of a reference angular position relative to the vertical, for example acquired during the installation of the unit 1 (any inclination with respect to the vertical being possible), and a means for comparing the difference between the value measured by the means 5 and this reference value, with a threshold value for triggering signaling to the system.

Ainsi, l'invention permet de manière simple d'atteindre le but précité, sans entraîner de modification constructive notable.Thus, the invention allows a simple way to achieve the above purpose, without causing significant constructive change.

Par conséquent, l'unité de détection 1 ayant été installée originellement avec une orientation ou un pointage initial ou de référence, toute manipulation de ladite unité 1 qui entraîne un changement (non voulu) d'orientation du moyen 5 au-delà d'une valeur seuil préréglée, provoque la génération d'une alarme ou d'un avertissement informant la centrale d'une tentative de neutralisation ou de détérioration de l'unité 1, en particulier d'un déplacement de celle-ci, volontaire ou accidentel.Therefore, the detection unit 1 having been originally installed with an orientation or an initial or reference pointing, any manipulation of said unit 1 which causes an (unwanted) change of orientation of the means 5 beyond a pre-set threshold value, causes the generating an alarm or a warning informing the central unit of an attempt to neutralize or deteriorate the unit 1, in particular a displacement thereof, whether voluntary or accidental.

Le moyen de mémorisation et le moyen de comparaison peuvent, par exemple, être fournis par un circuit intégré 8 du type microprocesseur à mémoire ou microcontrôleur, monté dans le boîtier 2 et faisant partie du groupement d'éléments fonctionnels 3 de l'unité 1.The storage means and the comparison means may, for example, be provided by an integrated circuit 8 of the memory or microcontroller microprocessor type, mounted in the housing 2 and forming part of the functional element group 3 of the unit 1.

Le moyen de comparaison précité peut se présenter sous la forme d'un circuit matériel ou être fourni sous la forme d'une fonction logicielle réalisée par le circuit intégré 8.The abovementioned comparison means may be in the form of a hardware circuit or may be provided in the form of a software function performed by the integrated circuit 8.

Le moyen 5 peut fournir une mesure de la valeur absolue de l'orientation (et donc de sa variation) directement de la différence entre la référence et la position courante, au circuit intégré 8.The means 5 can provide a measurement of the absolute value of the orientation (and therefore of its variation) directly of the difference between the reference and the current position, to the integrated circuit 8.

Le cas échéant, le moyen de mesure 5 peut également être intégré dans le circuit intégré 8 (voir figure 5) en formant ainsi un circuit hybride dédié 5, 8.Where appropriate, the measuring means 5 can also be integrated in the integrated circuit 8 (see FIG. figure 5 ) thereby forming a dedicated hybrid circuit 5, 8.

Le signal de mesure fourni par le moyen 5 peut être exploité par l'unité 1 elle-même, qui transmettra alors le cas échéant un signal d'alarme à la centrale du système, ou être transmis (tel quel ou après prétraitement) à cette dernière pour son exploitation.The measurement signal supplied by the means 5 can be operated by the unit 1 itself, which will then transmit an alarm signal if necessary to the central unit of the system, or be transmitted (as it is or after preprocessing) to this unit. last for its exploitation.

Dans le premier cas correspondant à l'invention et de manière pratique, l'unité 1 mémorise une position angulaire consécutive à l'installation, et compare les mesures suivantes à cette valeur de référence. Un seuil correspondant à l'écart maximum toléré déterminera à quel moment la signalisation est effectivement déclenchée.In the first case corresponding to the invention and in a practical manner, the unit 1 stores an angular position consecutive to the installation, and compares the following measurements with this reference value. A threshold corresponding to the maximum deviation tolerated will determine when the signaling is actually triggered.

En accord avec un mode de réalisation préféré de l'invention, le moyen 5 apte à mesurer une variation de l'angle absolu par rapport à la verticale comprend ou consiste en un inclinomètre associé à une surface de référence faisant partie de l'unité 1, du boîtier 2 ou d'un élément fonctionnel 3 faisant partie du ou de l'un des dispositifs du type détecteur ou caméra.According to a preferred embodiment of the invention, the means 5 capable of measuring a variation of the absolute angle relative to the vertical comprises or consists of an inclinometer associated with a reference surface forming part of the unit 1 , the housing 2 or a functional element 3 forming part of one or one of the devices of the detector or camera type.

En vue de permettre également la détection d'une éventuelle ouverture non autorisée du boîtier 2, le moyen 5 est avantageusement monté sur une partie du boîtier 2 ou sur un support d'un groupement d'éléments fonctionnels 3, tel qu'une carte électronique 3', subissant nécessairement, en cas d'ouverture du boîtier 2, un déplacement ou un mouvement générant une modification de son orientation angulaire, en particulier un mouvement de rotation ou de pivotement.In order to also allow detection of possible unauthorized opening of the housing 2, the means 5 is advantageously mounted on a portion of the housing 2 or on a support of a group of functional elements 3, such as an electronic card 3 ', necessarily undergoing, in case of opening of the housing 2, a displacement or a movement generating a change in its angular orientation, in particular a rotational movement or pivoting.

La mise en oeuvre de cette caractéristique nécessite une conception adaptée du boîtier 2 de telle manière que son ouverture nécessite ou entraîne une rotation de la partie électronique de l'unité 1 qui sera détectée par le moyen 5.The implementation of this characteristic requires a suitable design of the housing 2 in such a way that its opening requires or causes a rotation of the electronic part of the unit 1 which will be detected by the means 5.

Conformément à un premier mode de réalisation de l'invention, le moyen du type inclinomètre 5 consiste en un circuit intégré intégrant une électronique de conditionnement du signal délivré par un élément sensible sous la forme d'un microsystème usiné sur silicium et constitué d'un peigne capacitif se déformant sous l'action de la gravité.According to a first embodiment of the invention, the means of the inclinometer type 5 consists of an integrated circuit integrating a signal conditioning electronics delivered by a sensitive element in the form of a microsystem machined on silicon and consisting of a Capacitive comb deforming under the action of gravity.

Conformément à un second mode de réalisation de l'invention, le moyen du type inclinomètre 5 consiste en un accéléromètre à deux axes, en particulier de type MEMS.According to a second embodiment of the invention, the means of the inclinometer type 5 consists of a two-axis accelerometer, in particular of the MEMS type.

Avantageusement, l'inclinomètre 5 du type accéléromètre à deux axes fournit un signal de mesure avec une composante continue correspondant à l'attraction terrestre et une composante alternative permettant, lorsque sa valeur dépasse un seuil prédéterminé, la détection des vibrations et/ou des déplacements brutaux de la surface de référence associée audit inclinomètre 5.Advantageously, the inclinometer 5 of the two-axis accelerometer type provides a measurement signal with a DC component corresponding to the terrestrial attraction and an AC component allowing, when its value exceeds a predetermined threshold, the detection of vibrations and / or displacements. brutal reference surface associated with said inclinometer 5.

Une telle réalisation de l'inclinomètre autorise une détection plus universelle des manipulations de l'unité 1 concernée.Such an embodiment of the inclinometer allows a more universal detection of the manipulations of the unit 1 concerned.

Le signe du signal fourni par l'accéléromètre peut être exploité, par exemple par le microprocesseur 8 pour déterminer si la caméra formant l'unité 1 (figure 4) ou intégrée dans l'unité 1 (figure 5) est disposée "tête en haut" (comme sur la figure 4) ou "tête en bas" (caméra suspendue). Cette fonction permet, le cas échéant, de rétablir une image à l'endroit en fournissant un signal de sortie inversé ou "miroir".The sign of the signal supplied by the accelerometer can be exploited, for example by the microprocessor 8 to determine if the camera forming the unit 1 ( figure 4 ) or integrated in Unit 1 ( figure 5 ) is arranged "head up" (as on the figure 4 ) or "upside down" (suspended camera). This function can, if necessary, restore an image to the place by providing an inverted output signal or "mirror".

Il convient de noter que l'unité 1 peut comprendre, en plus de l'inclinomètre 5, un ou plusieurs autre(s) moyens de protection ou de sécurité comme indiqué ci-après.It should be noted that the unit 1 may comprise, in addition to the inclinometer 5, one or more other means (s) of protection or security as indicated below.

L'inclinomètre 5 sous forme de circuit intégré peut être monté comme composant supplémentaire sur la carte de circuit imprimé portant les composants réalisant les autres fonctions de l'unité de détection 1. Cette dernière peut alors présenter aussi bien une forme de réalisation telle que représentée sur les figures 1 à 3 (avec les zones prédécoupées ou lignes de fragilisation en moins, ainsi qu'éventuellement le contact), qu'une forme de réalisation telle que ressortant de la figure 4 (montage sur bras articulé).The inclinometer 5 in the form of an integrated circuit can be mounted as an additional component on the printed circuit board carrying the components performing the other functions of the detection unit 1. The latter can then have both an embodiment as shown on the Figures 1 to 3 (with the pre-cut zones or lines of weakening less, as well as possibly the contact), that an embodiment such as emerging from the figure 4 (articulated arm mounting).

En accord avec une caractéristique additionnelle de l'invention, l'unité 1 peut également comprendre un capteur 6 permettant la détermination de l'orientation du champ magnétique terrestre et apte à fournir une indication sur l'orientation d'un dispositif de détection ou de visualisation directif de ladite unité 1 ou de cette dernière elle-même, ledit capteur 6 pouvant éventuellement consister en un capteur magnéto-résistif.In accordance with an additional characteristic of the invention, the unit 1 may also comprise a sensor 6 enabling the determination of the orientation of the earth's magnetic field and capable of providing an indication of the orientation of a detection or detection device. directional viewing of said unit 1 or the latter itself, said sensor 6 possibly being a magneto-resistive sensor.

Afin de permettre la détection d'un changement de hauteur de l'unité 1 sans modification de l'angle vertical ou de l'orientation de celle-ci (par exemple coulissement de l'unité 1 le long d'un mât lisse), une variante de réalisation de l'invention prévoit que l'unité 1 comprenne également un moyen 7 de détermination de la hauteur de ladite unité 1 par rapport au sol ou à une surface de référence, par exemple sous la forme d'un capteur ultrasonique, d'un capteur de pression ou analogue (par exemple un dispositif GPS).In order to allow the detection of a change of height of the unit 1 without modification of the vertical angle or of the orientation thereof (for example sliding of the unit 1 along a smooth mast), an alternative embodiment of the invention provides that the unit 1 also comprises a means 7 for determining the height of said unit 1 relative to the ground or to a reference surface, for example in the form of an ultrasonic sensor, a pressure sensor or the like (for example a GPS device).

Une autre variante de réalisation peut prévoir de détecter le changement de hauteur en exploitant la composante alternative du signal de mesure fourni par l'inclinomètre 5 du type accéléromètre mentionné précédemment.Another variant embodiment can provide for detecting the height change by exploiting the AC component of the measurement signal supplied by the inclinometer 5 of the aforementioned accelerometer type.

De manière avantageuse, la mesure angulaire est réalisée de manière intermittente pour diminuer la consommation électrique du système et notamment de l'unité 1, en particulier lorsque cette dernière fonctionne de manière autonome à l'aide de piles ou de batteries. Dans ce cas, le moyen 5 est activé de manière intermittente.Advantageously, the angular measurement is performed intermittently to reduce the power consumption of the system and especially the unit 1, especially when the latter operates autonomously using batteries or batteries. In this case, the means 5 is activated intermittently.

La présente invention propose également, en particulier en relation avec le mode de réalisation représenté sur la figure 5, de renforcer la protection d'une unité telle qu'évoquée ci-dessus contre l'arrachement (notamment en cas de fixation sur un mur 13 ou un support analogue) et/ou contre l'ouverture non autorisée du boîtier 2, par exemple en désolidarisant les parties 2' et 2" constitutives de ce dernier.The present invention also proposes, in particular in connection with the embodiment shown on the figure 5 , to reinforce the protection of a unit as mentioned above against tearing (especially in case of attachment to a wall 13 or a similar support) and / or against the unauthorized opening of the housing 2, for example by separating the constituent parts 2 'and 2 "of the latter.

A cet effet, il peut être prévu que l'unité 1 comprenne également, parmi ses éléments fonctionnels 3, au moins un moyen 9 apte à mesurer une variation de capacité entre au moins deux pièces formant électrodes 10 ou entre au moins une pièce formant électrode 10 et une masse, virtuelle ou réelle de ladite unité 1, ladite ou lesdites électrodes 10 étant situées sur ou à l'intérieur du boîtier 2 en un emplacement protégé de l'approche non délibérée ou involontaire d'un objet, élément, corps ou analogue susceptible d'influencer ou de modifier une charge ou un champ électrique, ledit moyen 10 délivrant un signal de mesure, de dépassement ou d'incident exploitable par l'unité 1 et/ou par le système auquel appartient ladite unité 1 et formant en association avec ladite au moins une électrode 10 un détecteur de proximité de type capacitif.For this purpose, it can be provided that the unit 1 also comprises, among its functional elements 3, at least one means 9 able to measure a variation of capacitance between at least two pieces forming electrodes 10 or between at least one piece forming an electrode And a mass, virtual or real, of said unit 1, said one or more electrodes 10 being located on or inside the housing 2 in a location protected from the unintentional or unintentional approach of an object, element, body or analog likely to influence or modify a load or field electrical means, said means 10 delivering a measurement signal, exceeding or incident usable by the unit 1 and / or by the system to which said unit 1 belongs and forming in association with said at least one electrode 10 a proximity detector of capacitive type.

Selon la sensibilité de l'ensemble [électrodes 10 / moyen de mesure 9], le déclenchement d'un avertissement indiquant un incident portant atteinte à la sécurité de l'unité 1 peut intervenir soit au moment du contact avec la ou l'une des électrodes 10, soit déjà dans une phase d'approche de cette électrode 10, avant tout contact physique avec cette dernière.Depending on the sensitivity of the assembly [electrodes 10 / measuring means 9], the triggering of a warning indicating an incident affecting the safety of the unit 1 may occur either at the time of contact with the or one of the electrodes 10, or already in an approach phase of this electrode 10, before any physical contact with the latter.

Le déclenchement de l'avertissement intervient bien entendu également en cas de rupture de la liaison ou du raccordement électrique entre la ou les électrodes 10 et le moyen 9.The warning is triggered, of course, also in the event of a break in the connection or electrical connection between the electrode (s) 10 and the means 9.

Le type de signal délivré par le moyen 9 (mesure, dépassement, avertissement) sera fonction du mode de fonctionnement du système auquel appartient ladite unité 1, de la sophistication du moyen 9 (circuit analogique ou numérique), du type de liaison existant entre l'unité 1 concernée et la centrale du système et du type d'alimentation de ladite unité 1, qui conditionne son activité et son autonomie énergétique.The type of signal delivered by the means 9 (measurement, overshoot, warning) will depend on the operating mode of the system to which said unit 1 belongs, the sophistication of the means 9 (analog or digital circuit), the type of link existing between the unit 1 concerned and the central system and the type of power supply of said unit 1, which determines its activity and its energy autonomy.

Le moyen 9 peut consister soit en un simple circuit de mesure, soit en un circuit de mesure et d'évaluation.The means 9 can consist either of a simple measuring circuit or of a measurement and evaluation circuit.

A titre d'exemples de réalisation pratiques non limitatifs, le moyen 9, associé à ladite au moins une électrode 10 pour former un détecteur de proximité, est choisi dans le groupe formé par les circuits détecteurs à constante de temps RC, à décalage de phase, à modulation de fréquence et à modulation d'amplitude. De tels détecteurs de proximité de type capacitif sont connus en particulier de la Société Freescale Semiconductors (nom déposé).As nonlimiting practical examples of embodiment, the means 9, associated with said at least one electrode 10 to form a proximity detector, is chosen from the group formed by the RC time-shift detector circuits, with phase shift. , with frequency modulation and amplitude modulation. Such capacitive type proximity sensors are known in particular from the company Freescale Semiconductors (registered name).

Le moyen 9 peut soit se présenter, comme indiqué ci-dessus, sous la forme d'un circuit indépendamment monté sur une carte ou un circuit imprimé 3', soit éventuellement être intégré dans un circuit hybride incorporant également le microprocesseur 8 et l'inclinomètre 5.The means 9 may be, as indicated above, in the form of a circuit independently mounted on a card or a printed circuit 3 ', or possibly be integrated in a hybrid circuit also incorporating the microprocessor 8 and the inclinometer 5.

En accord avec une variante d'exécution très avantageuse de l'invention, illustrée sur la figure 5 des dessins, l'une des ou ladite au moins une électrode(s) 10 consiste en une pièce conductrice d'assemblage ou de fixation du boîtier de protection 3, préférentiellement une pièce métallique, telle que par exemple une vis ou analogue.In accordance with a very advantageous embodiment variant of the invention, illustrated on the figure 5 drawings, one or at least one electrode (s) 10 consists of a conductive part of assembly or attachment of the protective housing 3, preferably a metal part, such as for example a screw or the like.

La figure 5 illustre simultanément une vis d'assemblage et (en tracé pointillé) une vis de fixation, susceptibles de former chacune une électrode 10.The figure 5 simultaneously illustrates an assembly screw and (in dotted line) a fixing screw, each capable of forming an electrode 10.

Dans le cadre de la variante précitée, il peut être prévu que la ou chaque pièce d'assemblage ou de fixation amovible 10 formant électrode soit montée dans un écrou 14, une douille filetée ou un site de montage analogue raccordé(e) électriquement au moyen de mesure 9, le raccordement entre ladite électrode 10 et ledit moyen de mesure 9 n'étant établi qu'après montage complet ou définitif de la pièce 10 correspondante.In the context of the aforementioned variant, it can be provided that the or each removable assembly or fixing piece 10 forming an electrode is mounted in a nut 14, a threaded socket or a similar mounting site electrically connected to the means measurement 9, the connection between said electrode 10 and said measuring means 9 being established only after complete or definitive assembly of the corresponding part 10.

L'écrou 14 peut par exemple se présenter, comme le montre la figure 5, sous la forme d'un écrou en tôle pliée solidaire du circuit imprimé (soudé ou serti) et qui est relié électriquement directement sur une entrée de mesure du moyen 9.The nut 14 can for example be presented, as shown in FIG. figure 5 , in the form of a folded sheet metal nut secured to the printed circuit (soldered or crimped) and which is electrically connected directly to a measuring input of the means 9.

Ainsi, il est également possible d'utiliser le détecteur de proximité formé par 9 et 10 pour contrôler l'assemblage correct des différentes parties 2', 2" du boîtier de protection 2.Thus, it is also possible to use the proximity detector formed by 9 and 10 to control the correct assembly of the different parts 2 ', 2 "of the protective housing 2.

En vue d'éviter un déclenchement intempestif de l'avertissement d'une effraction ou d'un arrachement, non lié à une action volontaire, ladite au moins une électrode 10 est montée au niveau d'un renfoncement ou d'une déformation rentrante analogue 11 du boîtier de protection 2.In order to avoid inadvertent triggering of the warning of a burglary or tearing, not linked to a voluntary action, said at least one electrode 10 is mounted at a recess or similar reentrant deformation 11 of the protective case 2.

De manière avantageuse, l'électrode ou chaque électrode 10, sous forme de moyen d'assemblage ou de fixation, est logée au fond d'une déformation 11 en forme de puits d'une partie constitutive 2', 2" du boîtier de protection 2.Advantageously, the electrode or each electrode 10, in the form of assembly or fixing means, is housed at the bottom of a well-shaped deformation 11 of a constituent part 2 ', 2 "of the protective case 2.

Selon une variante de réalisation alternative ou additionnelle pour au moins une électrode 10, il peut en outre être prévu que l'une des ou ladite au moins une électrode 10 est située à un emplacement dans le boîtier de protection 2 qui est distant de la paroi 12 de ce dernier, en particulier des portions de paroi accessibles et apparentes à l'état installé de ladite unité 1 (voir électrode 10 représentée en traits interrompus sur le circuit imprimé 3' de la figure 5).According to an alternative or additional embodiment for at least one electrode 10, it may further be provided that one or at least one electrode 10 is located at a location in the protective housing 2 which is remote from the wall 12 of the latter, in particular accessible wall portions and apparent in the installed state of said unit 1 (see electrode 10 shown in broken lines on the printed circuit 3 'of the figure 5 ).

En accord avec une autre variante de réalisation alternative ou additionnelle, il peut être prévu que l'électrode 10 ou au moins une électrode 10 consiste en un moyen de détection de la présence de l'extrémité d'une vis d'assemblage, ce moyen se présentant sous la forme d'une portion de bande ou de piste du circuit imprimé 3' portant les éléments ou composants fonctionnels 3 de ladite unité 1, reliée au moyen 9.In accordance with another alternative or additional embodiment, it can be provided that the electrode 10 or at least one electrode 10 consists of a means of detecting the presence of the end of an assembly screw, this means in the form of a portion strip or track of the printed circuit 3 'bearing the elements or functional components 3 of said unit 1, connected to the means 9.

A titre de réalisation pratique, la zone du circuit imprimé 3' recevant l'écrou 14 peut être entourée d'une piste située à distance réduite et qui est reliée à l'entrée de mesure du moyen 2.As a practical embodiment, the area of the printed circuit 3 'receiving the nut 14 may be surrounded by a track located at a reduced distance and which is connected to the measuring input of the means 2.

La première variante décrite précédemment (vis 10 formant électrode reliée directement) délivre un niveau de signal très fort, mais est susceptible d'augmenter la susceptibilité de l'électronique, en particulier en cas de décharge électrostatique, contrairement à la dernière variante ci-dessus dans laquelle la piste qui entoure l'écrou 14 forme un condensateur avec l'écrou. Bien entendu, le niveau de signal s'en trouve fortement réduit, mais le risque de décharge électrostatique est également fortement réduit. Le choix de l'une ou l'autre variante peut dépendre de l'utilisation finale (et de l'environnement associé).The first variant described above (screw 10 directly connected electrode) delivers a very strong signal level, but is likely to increase the susceptibility of the electronics, especially in case of electrostatic discharge, unlike the last variant above wherein the track surrounding the nut 14 forms a capacitor with the nut. Of course, the signal level is greatly reduced, but the risk of electrostatic discharge is also greatly reduced. The choice of one or the other variant may depend on the end use (and the associated environment).

Ainsi, grâce à l'invention, il est possible de relever et de signaler différents types de possibles neutralisations d'une unité de détection 5.Thus, thanks to the invention, it is possible to identify and report different types of possible neutralizations of a detection unit 5.

Il est également possible de relever un éventuel mouvement ou déplacement de l'unité 5 non forcément consécutif à un acte volontaire.It is also possible to note a possible movement or displacement of the unit 5 not necessarily consecutive to a voluntary act.

Ainsi, lorsque la rotule utilisée pour régler le pointage de l'unité 1 est insuffisamment bloquée, son orientation peut se dérégler sans action malveillante. Ceci peut se produire sous le poids de la neige accumulé sur le boîtier 2, ou lorsque un oiseau vient se poser sur celui-ci. Le déréglage est alors détecté par le changement d'angle vertical.Thus, when the patella used to adjust the pointing of the unit 1 is insufficiently blocked, its orientation can be disrupted without malicious action. This can occur under the weight of the snow accumulated on the housing 2, or when a bird comes to rest on it. The adjustment is then detected by the vertical angle change.

En outre, les caractéristiques additionnelles de l'invention permettent de garantir une protection renforcée de l'unité 1 contre l'arrachement et/ou contre une ouverture non autorisée de son boîtier de protection 2.In addition, the additional features of the invention make it possible to guarantee a reinforced protection of the unit 1 against tearing and / or against an unauthorized opening of its protective case 2.

La présente invention a également pour objet un système de sécurité, d'alarme et/ou de surveillance comprenant une unité centrale et au moins une unité périphérique, caractérisé en ce que ladite ou chaque unité périphérique consiste en une unité de détection 1 tel que décrit ci-dessus.The present invention also relates to a security, alarm and / or surveillance system comprising a central unit and at least one peripheral unit, characterized in that said or each peripheral unit consists of a detection unit 1 as described above.

Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et représentés aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (15)

Unité de détection intégrant au moins un détecteur de mouvements, un détecteur de présence, une caméra ou une combinaison d'au moins deux tels dispositifs, notamment en tant que composante d'un système de sécurité, d'alarme et/ou de surveillance, les éléments fonctionnels de ladite unité étant logés dans un boîtier fixé à un mur, un mât, une toiture ou analogue, notamment par l'intermédiaire d'un accessoire de fixation, en particulier du type bras articulé ou analogue, unité (1) caractérisée en ce qu'elle comprend également : - un moyen (5) apte à mesurer une variation de l'angle absolu par rapport à la verticale d'une surface de référence du boîtier (2), d'une partie du boîtier (2), d'au moins un élément fonctionnel interne ou d'un groupement de tels éléments fonctionnels internes (3), et à délivrer un signal de mesure exploitable par l'unité (1) et/ou le système auquel appartient ladite unité (1), - un moyen de mémorisation d'une position angulaire de référence par rapport à la verticale, par exemple acquise lors de l'installation de l'unité (1), et, - un moyen de comparaison de la différence entre la valeur mesurée par le moyen (5) et cette valeur de référence, avec une valeur seuil de déclenchement de la signalisation au système. Detection unit integrating at least one motion detector, a presence detector, a camera or a combination of at least two such devices, in particular as a component of a security, alarm and / or surveillance system, the functional elements of said unit being housed in a housing fixed to a wall, a mast, a roof or the like, in particular by means of a fixing accessory, in particular of the articulated arm type or the like, unit (1) characterized in that it also includes: means (5) capable of measuring a variation of the absolute angle with respect to the vertical of a reference surface of the housing (2), a portion of the housing (2), at least one functional element or a group of such internal functional elements (3), and to deliver a measurement signal exploitable by the unit (1) and / or the system to which said unit (1) belongs, means for storing a reference angular position with respect to the vertical, for example acquired during the installation of the unit (1), and a means for comparing the difference between the value measured by the means (5) and this reference value, with a threshold value for triggering the signaling to the system. Unité selon la revendication 1, caractérisée en ce que le moyen (5) apte à mesurer une variation de l'angle absolu par rapport à la verticale comprend un moyen de mesure du type inclinomètre associé à une surface de référence faisant partie de l'unité (1), du boîtier (2) ou d'un élément fonctionnel (3).Unit according to Claim 1, characterized in that the means (5) capable of measuring a variation of the absolute angle with respect to the vertical comprises an inclinometer-type measuring means associated with a reference surface forming part of the unit. (1), the housing (2) or a functional element (3). Unité selon l'une quelconque des revendications 1 et 2, caractérisée en ce que le moyen de mesure du type inclinomètre (5) est monté sur une partie du boîtier (2) ou sur un support d'un groupement d'éléments fonctionnels (3), tel qu'une carte électronique, subissant nécessairement, en cas d'ouverture du boîtier (2), un déplacement ou un mouvement générant une modification de son orientation angulaire, en particulier un mouvement de rotation ou de pivotement.Unit according to either of Claims 1 and 2, characterized in that the inclinometer-type measuring means (5) is mounted on a part of the housing (2) or on a support of a group of functional elements (3). ), such as an electronic card, necessarily undergoes, in case of opening of the housing (2), a displacement or a movement generating a change in its angular orientation, in particular a rotational or pivoting movement. Unité selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le moyen du type inclinomètre (5) consiste en un circuit intégré intégrant une électronique de conditionnement du signal délivré par un élément sensible sous la forme d'un microsystème usiné sur silicium et constitué d'un peigne capacitif se déformant sous l'action de la gravité.Unit according to one of Claims 1 to 3, characterized in that the inclinometer means (5) consists of a integrated circuit integrating a signal conditioning electronics delivered by a sensitive element in the form of a microsystem machined on silicon and consisting of a capacitive comb deforming under the action of gravity. Unité selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le moyen du type inclinomètre (5) consiste en un accéléromètre à deux axes, en particulier de type MEMS.Unit according to any one of Claims 1 to 3, characterized in that the means of the inclinometer type (5) consist of a two-axis accelerometer, in particular of the MEMS type. Unité selon la revendication 5, caractérisée en ce que l'inclinomètre (5) du type accéléromètre à deux axes fournit un signal de mesure avec une composante continue correspondant à l'attraction terrestre et une composante alternative permettant, lorsque sa valeur dépasse un seuil prédéterminé, la détection des vibrations et/ou des déplacements brutaux de la surface de référence associée audit inclinomètre (5).Unit according to claim 5, characterized in that the inclinometer (5) of the two-axis accelerometer type provides a measurement signal with a DC component corresponding to the terrestrial attraction and an AC component allowing, when its value exceeds a predetermined threshold , the detection of vibrations and / or abrupt displacements of the reference surface associated with said inclinometer (5). Unité selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comprend également un capteur (6) permettant la détermination de l'orientation du champ magnétique terrestre et apte à fournir une indication sur l'orientation d'un dispositif de détection ou de visualisation directif de ladite unité (1) ou de cette dernière elle-même.Unit according to any one of claims 1 to 6, characterized in that it also comprises a sensor (6) for determining the orientation of the earth's magnetic field and capable of providing an indication of the orientation of a device directional detection or viewing of said unit (1) or the latter itself. Unité selon la revendication 7, caractérisée en ce que le capteur (6) de détermination de l'orientation du champ magnétique terrestre consiste en un capteur magnéto-résistif.Unit according to claim 7, characterized in that the sensor (6) for determining the orientation of the earth's magnetic field consists of a magneto-resistive sensor. Unité selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle comprend également un moyen (7) de détermination de la hauteur de ladite unité (1) par rapport au sol ou à une surface de référence, par exemple sous la forme d'un capteur ultrasonique, d'un capteur de pression ou analogue.Unit according to any one of claims 1 to 8, characterized in that it also comprises means (7) for determining the height of said unit (1) relative to the ground or to a reference surface, for example under the form of an ultrasonic sensor, a pressure sensor or the like. Unité selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le moyen de type inclinomètre (5) est activé de manière intermittente.Unit according to one of Claims 1 to 9, characterized in that the inclinometer means (5) is activated intermittently. Unité selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'elle comprend également au moins un moyen (9) apte à mesurer une variation de capacité entre au moins deux pièces formant électrodes (10) ou entre au moins une pièce formant électrode (10) et une masse, virtuelle ou réelle de ladite unité (1), ladite ou lesdites électrodes (10) étant situées sur ou à l'intérieur du boîtier (2) en un emplacement protégé de l'approche non délibérée ou involontaire d'un objet, élément, corps ou analogue susceptible d'influencer ou de modifier une charge ou un champ électrique, ledit moyen (10) délivrant un signal de mesure, de dépassement ou d'incident exploitable par l'unité (1) et/ou par le système auquel appartient ladite unité (1) et formant en association avec ladite au moins une électrode (10) un détecteur de proximité de type capacitif.Unit according to any one of claims 1 to 10, characterized in that it also comprises at least one means (9) able to measure a variation of capacity between at least two pieces forming electrodes (10) or between at least one piece forming an electrode (10) and a mass, virtual or real, of said unit (1), said one or more electrodes (10) being located on or within the housing (2) in a protected location of the unintended approach or an object, element, body or analog that may influence or modify a load or an electric field, said means (10) delivering a measuring, passing or incident signal usable by the unit (1) and / or by the system to which said unit (1) belongs and forming in association with said at least one electrode (10) a capacitive type proximity sensor. Unité selon la revendication 11, caractérisée en ce que l'une des ou ladite au moins une électrode(s) (10) consiste en une pièce conductrice d'assemblage ou de fixation du boîtier de protection (2), préférentiellement une pièce métallique, telle que par exemple une vis ou analogue.Unit according to Claim 11, characterized in that one or at least one electrode (s) (10) consists of a conductive part for assembling or fixing the protective casing (2), preferably a metal part, such as for example a screw or the like. Unité selon l'une quelconque des revendications 11 et 12, caractérisée en ce que ladite au moins une électrode (10) est montée au niveau d'un renfoncement ou d'une déformation rentrante analogue (11) du boîtier de protection (2), par exemple en étant logée au fond d'une déformation (11) en forme de puits d'une partie constitutive (2', 2") du boîtier de protection (2).Unit according to any one of claims 11 and 12, characterized in that said at least one electrode (10) is mounted at a recess or similar re-entrant deformation (11) of the protective casing (2), for example by being housed at the bottom of a well-shaped deformation (11) of a constituent part (2 ', 2 ") of the protective casing (2). Unité selon l'une quelconque des revendications 11 et 12, caractérisée en ce que l'une des ou ladite au moins une électrode (10) est située à un emplacement dans le boîtier de protection (2) qui est distant de la paroi (12) de ce dernier, en particulier des portions de paroi accessibles et apparentes à l'état installé de ladite unité (1).Unit according to any one of claims 11 and 12, characterized in that one or at least one electrode (10) is located at a location in the protective housing (2) which is remote from the wall (12). ) of the latter, in particular accessible and apparent wall portions in the installed state of said unit (1). Système de sécurité, d'alarme et/ou de surveillance comprenant une unité centrale et au moins une unité périphérique, caractérisé en ce que ladite ou chaque unité périphérique consiste en une unité de détection (1) selon l'une quelconque des revendications 1 à 14.Security, alarm and / or surveillance system comprising a central unit and at least one peripheral unit, characterized in that said or each peripheral unit consists of a detection unit (1) according to any one of claims 1 to 14.
EP09305376.7A 2008-04-29 2009-04-29 Detection unit protected against removal and/or theft and system comprising at least one such unit. Active EP2113896B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09305376T PL2113896T3 (en) 2008-04-29 2009-04-29 Detection unit protected against removal and/or theft and system comprising at least one such unit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0852867A FR2930666B1 (en) 2008-04-29 2008-04-29 DETECTION UNIT PROTECTED AGAINST ARRACTION AND / OR DEPRESSION AND SYSTEM COMPRISING AT LEAST ONE SUCH UNIT
FR0854735A FR2933797B1 (en) 2008-07-11 2008-07-11 DETECTION UNIT PROTECTED AGAINST ARRACTION AND / OR DEPRESSION AND SYSTEM COMPRISING AT LEAST ONE SUCH UNIT

Publications (3)

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EP2113896A1 true EP2113896A1 (en) 2009-11-04
EP2113896A8 EP2113896A8 (en) 2010-01-13
EP2113896B1 EP2113896B1 (en) 2013-10-16

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EP (1) EP2113896B1 (en)
ES (1) ES2440276T3 (en)
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IT201900007059A1 (en) * 2019-05-21 2020-11-21 Inxpect S P A Method for detecting tampering with a target detection system
DE202020100399U1 (en) * 2020-01-27 2020-03-16 Securiton Gmbh Decentralized sabotage detection for surveillance systems
CN117308884B (en) * 2023-11-29 2024-02-13 金键建设有限公司 Automatic inclinometer

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Also Published As

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US20090271144A1 (en) 2009-10-29
PL2113896T3 (en) 2014-04-30
EP2113896A8 (en) 2010-01-13
EP2113896B1 (en) 2013-10-16
ES2440276T3 (en) 2014-01-28

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