EP0442338A1 - Optical monitoring device - Google Patents

Optical monitoring device Download PDF

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Publication number
EP0442338A1
EP0442338A1 EP91101423A EP91101423A EP0442338A1 EP 0442338 A1 EP0442338 A1 EP 0442338A1 EP 91101423 A EP91101423 A EP 91101423A EP 91101423 A EP91101423 A EP 91101423A EP 0442338 A1 EP0442338 A1 EP 0442338A1
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EP
European Patent Office
Prior art keywords
monitoring
housing
monitoring device
optical monitoring
lens
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
EP91101423A
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German (de)
French (fr)
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EP0442338B1 (en
Inventor
Kurt Dr. Nordmann
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Individual
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Individual
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Publication of EP0442338A1 publication Critical patent/EP0442338A1/en
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19632—Camera support structures, e.g. attachment means, poles
    • 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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19619—Details of casing
    • 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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/1963—Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]

Definitions

  • the invention relates to an optical monitoring device with a plurality of monitoring units which can be rotated about a suspension, each monitoring unit having a housing for pivotably accommodating at least one camera, from which only the lens is perceptible to the outside and furthermore lens dummies are pivotably arranged on each housing, and with a device common to the monitoring units for controlling camera and movement functions.
  • Such monitoring devices are used to monitor publicly accessible locations, such as Shops, used.
  • the individual surveillance units are traditionally supposed to perform essentially two functions, namely, on the one hand, to enable video surveillance of the premises to be as targeted as possible, and on the other hand to deter potential thieves from the start. For cost reasons, it is also sought that, with the optimal deterrent effect, as few video cameras as possible have to be used without the potential thief noticing.
  • the aim is to design the monitoring device in such a way that it can also be used as a "management control" and information system which enables the store manager to gain an overview of the processes in the shop and to intervene accordingly.
  • All of the monitoring units in a local can be equipped with a camera or only a part thereof, with in extreme cases only one monitoring unit having a camera.
  • the monitoring units can now be replaced by the personnel themselves in such a way that new focal points of monitoring can be formed at any time by exchanging equipped units for others and vice versa.
  • Corresponding programs for the operation of the facility are stored and can be exchanged accordingly.
  • the arrangement of loudspeakers in each case parallel to the lenses or dummy objects allows on the one hand to make announcements to the shop users, which means that the installation of a separate loudspeaker system can be saved.
  • the swiveling loudspeakers have a pronounced deterrent effect on a potential thief, since he sees in it a means of alerting staff and customers.
  • the monitoring unit 1 shows a single monitoring unit 1 in its outer shape. Their design is important insofar as it is intended to have the greatest possible deterrent effect on potential thieves.
  • the monitoring unit has a housing 10 in which the entire mechanics and electronics are accommodated as a self-supporting functional unit 11 (cf. FIG. 3).
  • the functional unit 11 is connected via an electrical-mechanical quick coupling 20 (FIG. 5) to be described, to a suspension 12, which is fixedly arranged on the ceiling of a restaurant.
  • the housing 10 has two parallel, adjacent slot openings 14, which extend over an underlying circular sector of approximately 180 °. Through these slit openings 14 two blinds 15 can be seen from the outside, in each of which a camera lens 16 or a dummy and a loudspeaker 17 or a dummy are arranged on each side. Camera lenses 16 and loudspeakers 17, together with the blinds 15, can be pivoted along the slots, namely between an almost horizontal and a steeply downward position (cf. FIG. 3).
  • each camera lens 16 (or dummy) can be pivoted through the entire slit opening, ie the full sector, by 180 ° by not being able to recognize the lower position limit.
  • the loudspeaker 17 is pivoted parallel to each camera lens 16.
  • the moveable speaker acts as a deterrent to the thief because he has to assume that a targeted alarm will be triggered after being caught.
  • the entire arrangement is rotatable about the suspension 12. As can be seen from FIG. 1, the lateral areas appear to be out of observation at a certain rotational position. For this reason, camera-like protrusions 18 with a dark window 13 below are arranged on the side of the two slot openings 14 on the housing 10. A light-emitting diode or the like can be arranged behind the window 13, which gives the impression of active observation.
  • a quick coupling 20 is provided between the monitoring units 1 and the suspensions 12 permanently mounted in the location, by means of which the mechanical as well as the electrical connection can be established at the same time.
  • a union nut 21 is provided at the bottom of each suspension 12, which can be fastened to the monitoring unit via a coupling part 22.
  • the coupling part 22 remains stationary, while the functional unit 11 is mounted inside the housing on the plug part 22 and can be rotated with respect to the latter by means of a first motor M1.
  • a safety bracket 23 is fastened to the housing 10, which tightly encompasses the suspension 12. If the coupling 20 is released, the safety bracket 23 remains on the union nut 21 hang.
  • the arrangement is such that the clutch 20 can only be closed when the bracket 23 has already been inserted into the suspension 12, so that securing is ensured even during the assembly process. Since the safety bracket lies closely against the suspension 12 and rotates relative to it together with the monitoring unit 1, it must be avoided that the bracket presses against the suspension and thus causes a great deal of friction or squeaking noise. For this reason, the safety bracket 23, as can be seen in FIG. 6, is fastened to the housing 10 in an easily movable manner. For this purpose, a spacer sleeve 24 is provided, which is slightly thicker than the bracket wall, with which the bracket is forcibly attached to the housing 10 loosely.
  • each monitoring unit 1 there is a functional unit 11 which is rotatably suspended on the coupling part 22.
  • the functional unit 11 has a support part 30 with two outer holding plates 31 and two central struts 32.
  • a rocker 33 is arranged on each side between the struts 32 and the holding plates 31.
  • Fig. 3 only one of the two rockers 33 can be seen.
  • the rockers are mounted on a pivot axis 34 in the support part 30.
  • a swivel motor M2 (not shown in FIG. 3) is also arranged in the support part, by means of which the rockers 33 can be swiveled.
  • the circularly curved cover plates 15 with camera lenses 16 and loudspeakers 17 are arranged on the rockers.
  • the video camera 19 can also be attached to one of the rockers.
  • Stepper motors which are controlled incrementally are preferably used as motors.
  • the speed of rotary motor M1 as well as swivel motor M2 can thus be infinitely and optionally adjusted by computer control.
  • vertical and horizontal adjustment between 99 preprogrammed positions that can be changed at any time is possible. Thanks to the stepper motors, each selected position can be reproduced exactly, which is particularly important for the zoom settings of the camera.
  • the camera 19 is therefore preferably equipped with an adjustable zoom lens for variable focal lengths and image sections, the zoom position also being preprogrammable for each programmed position.
  • each monitoring unit 1 is connected via the suspension 12 to a central control device 40 which is arranged in a monitoring room (cf. FIG. 2).
  • the arrangement is such that all monitoring units are connected to two lines 41 drawn in parallel, which allows a much simpler installation than previous star-shaped connections.
  • the central control device 40 has a computer 42 with an input / output unit 43.
  • a videoswitch 44 with two independent programmable program units is used to switch and interconnect a video device 45, the cameras 19 and the monitors 46, 47, one of which is in the monitoring room and one or several are set up in the monitored premises themselves.
  • the monitoring program which can be displayed on the monitor 46 can thus be programmed independently of the program which is visible on the public monitor 47.
  • the monitor 47 in the surveillance room transmits the images of the camera 19 that is in operation, for example in accordance with a specific sequence
  • the video switch and the video device 45 on the monitor 46 can be used to mix surveillance scenes stored in the monitored location from the different locations of the currently inactive cameras can be imported with real-time images. Realtime images of the currently active camera and previously recorded, stored images from the perspectives of the non-active monitoring units thus alternately appear on the monitor 46.
  • the potential thief thus has the impression that all monitoring units are active, so that inactive units cannot be recognized.
  • the corresponding control programs can be created by means of the input / output unit 43 and stored in a plug-in RAM memory 51 of e.g. 32 K bytes of storage capacity can be saved.
  • a plug-in RAM memory 51 of e.g. 32 K bytes of storage capacity can be saved.
  • several different monitoring programs can be easily exchanged and e.g. can be adapted to a change in the active monitoring unit 1.
  • a program with up to 99 different positions of the monitoring units can be stored in each memory 51. Since the memories 51 can be replaced, the number of positions of the monitoring units that can be achieved is fundamentally unlimited.
  • the input and output unit 43 has an input keyboard 48 and an alphanumeric display 49, on which the respectively active monitoring unit 1 is labeled in words to facilitate operation.
  • the central control unit 40 also has, in a conventional manner, means for manual control. Furthermore, the control of the monitoring units 1 can also be triggered externally. For this purpose, switches S 1, S 2 .. can be connected to the control unit 40, which are anodized in the monitored premises in the form of light barriers, proximity switches, and alarm cargo or other goods security systems. If such a switch (eg S1) is triggered, one or more of the monitoring units 1 swings according to the program to the corresponding point. With the video device then also activated In this case an image of the thief can be taken.
  • switches S 1, S 2 .. can be connected to the control unit 40, which are anodized in the monitored premises in the form of light barriers, proximity switches, and alarm cargo or other goods security systems. If such a switch (eg S1) is triggered, one or more of the monitoring units 1 swings according to the program to the corresponding point. With the video device then also activated In this case an image of the thief can be taken.
  • the same device can also be used as customer information means, e.g. upon external triggering of a switch S 1, S 2, etc., customer information relating to the respective products is transmitted via the loudspeakers 17 of the corresponding monitoring unit 1. If a monitor 46 is provided in this area, an information film can also be played on this monitor instead of the surveillance images. Such an information film can e.g. are triggered by the customer himself by actuating a corresponding switch S 1.
  • a microphone 50 is provided on the input and output unit 43, via which the control person can use the loudspeaker 17 of the corresponding monitoring unit to address a customer individually.
  • the image of the speaking person preferably appears on the corresponding monitor 46, for which purpose a video camera (not shown) can also be provided in the monitoring room.
  • a (directional) microphone is arranged on the monitoring unit, via which the customer can communicate with the operator.
  • a processor 42 with the described input / output and storage options is provided in the central control device, which cooperates as a master in master-slave operation with local processors 9 in the monitoring units 1. He sends them their respective individual operating programs, after which they control the individual components individually.
  • the monitoring device described allows a versatile use, which optimal deterrence with very good monitoring options connect. It can also be used as information and / or alarm means.

Abstract

In order to combine an optimal deterrent effect with monitoring possibilities a monitoring installation includes a plurality of rotatable monitoring units, which units have two parallel slot shaped openings. These openings extend along a bottom circular sector. A camera lens and a loudspeaker arranged in a louvre are located in every slot shaped opening. These are traversable at least over part of the extent of the circular sector. A potential thief is given the impression of an uninterrupted monitoring. He is deferred further by the loudspeakers. These can at the same time be used for transmitting alarms, announcements or customer information.

Description

Die Erfindung betrifft eine optische Ueberwachungseinrichtung mit mehreren, um eine Aufhängung drehbaren Ueberwachungseinheiten, wobei jede Ueberwachungseinheit ein Gehäuse zur schwenkbaren Aufnahme mindestens einer Kamera besitzt, von der nach aussen lediglich das Objektiv wahrnehmbar ist und wobei ferner an jedem Gehäuse Objektivattrappen schwenkbar angeordnet sind, sowie mit einer den Ueberwachungseinheiten gemeinsamen Vorrichtung zum Steuern von Kamera- und Bewegungsfunktionen.The invention relates to an optical monitoring device with a plurality of monitoring units which can be rotated about a suspension, each monitoring unit having a housing for pivotably accommodating at least one camera, from which only the lens is perceptible to the outside and furthermore lens dummies are pivotably arranged on each housing, and with a device common to the monitoring units for controlling camera and movement functions.

Solche Ueberwachungseinrichtungen werden zum Ueberwachen von öffentlich zugänglichen Lokalen, wie z.B. Ladenlokalen, eingesetzt. Die einzelnen Ueberwachungseinheiten sollen herkömmlicherweise im wesentlichen zwei Funktionen erfüllen, nämlich einerseits eine möglichst zielgerichtete Videoüberwachung des Lokals ermöglichen und andererseits potentielle Diebe von vorneherein abschrecken. Aus Kostengründen wird ferner angestrebt, dass bei optimaler Abschreckwirkung möglichst wenige Videokameras eingesetzt werden müssen, ohne dass der potentielle Dieb dies bemerkt.Such monitoring devices are used to monitor publicly accessible locations, such as Shops, used. The individual surveillance units are traditionally supposed to perform essentially two functions, namely, on the one hand, to enable video surveillance of the premises to be as targeted as possible, and on the other hand to deter potential thieves from the start. For cost reasons, it is also sought that, with the optimal deterrent effect, as few video cameras as possible have to be used without the potential thief noticing.

Ferner wird angestrebt, die Ueberwachungseinrichtung derart auszugestalten, dass sie zugleich als "Management control" und Informationssystem eingesetzt werden kann, welches dem Ladenverantwortlichen ermöglicht, einen Ueberblick über die Abläufe im Laden zu gewinnen und entsprechend einzugreifen.Furthermore, the aim is to design the monitoring device in such a way that it can also be used as a "management control" and information system which enables the store manager to gain an overview of the processes in the shop and to intervene accordingly.

All dieses setzt eine Flexibilität beim Einsatz von Ueberwachungseinheiten voraus, welche bisher nicht erzielt werden konnte.All of this presupposes flexibility in the use of monitoring units, which could not previously be achieved.

Es stellt sich damit die Aufgabe, eine optische Ueberwachungseinrichtung derart auszugestalten, dass mit einem relativ einfachen konstruktiven Aufbau ein Optimum an Ueberwachungsmöglichkeit mit einem Optimum an Abschreckungswirkung verbindbar und die Einrichtung möglichst vielseitig einsetzbar ist.It is therefore the task of designing an optical monitoring device in such a way that, with a relatively simple construction, an optimum of monitoring options with one Optimal connectivity to deterrence and the facility is as versatile as possible.

Dies wird mit einer Ueberwachungseinrichtung gemäss Patentanspruch 1 erzielt.This is achieved with a monitoring device according to claim 1.

Es ist damit möglich, die Einrichtung auf einfache Weise wechselnden Bedürfnissen anzupassen. So können z.B. in einem Lokal sämtliche Ueberwachungseinheiten mit einer Kamera bestückt sein oder nur ein Teil davon, wobei im Extremfall nur eine Ueberwachungseinheit eine Kamera aufweist. Die Ueberwachungseinheiten können nun durch das Personal selbst so ausgetauscht werden, dass jederzeit neue Ueberwachungsschwerpunkte gebildet werden können, indem bestückte Einheiten gegen andere ausgetauscht werden und umgekehrt. Entsprechende Programme für den Betrieb der Einrichtung werden gespeichert und können entsprechend ausgetauscht werden.It is thus possible to easily adapt the facility to changing needs. For example, All of the monitoring units in a local can be equipped with a camera or only a part thereof, with in extreme cases only one monitoring unit having a camera. The monitoring units can now be replaced by the personnel themselves in such a way that new focal points of monitoring can be formed at any time by exchanging equipped units for others and vice versa. Corresponding programs for the operation of the facility are stored and can be exchanged accordingly.

Die Anordnung von Lautsprechern jeweils parallel zu den Objektiven bzw. Objektivattrappen gestatten es einerseits, Durchsagen an die Ladenbenutzer zu machen, womit die Installation einer separaten Lautsprecheranlage eingespart werden kann. Andererseits haben die schwenkbaren Lautsprecher eine ausgesprochene Abschreckungswirkung auf einen potentiellen Dieb, da er darin ein Mittel zur Alarmierung von Personal und Kunden erkennt.The arrangement of loudspeakers in each case parallel to the lenses or dummy objects allows on the one hand to make announcements to the shop users, which means that the installation of a separate loudspeaker system can be saved. On the other hand, the swiveling loudspeakers have a pronounced deterrent effect on a potential thief, since he sees in it a means of alerting staff and customers.

Weitere Eigenschaften und Vorteile der erfindungsgemässen Einrichtung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels, welches in den Zeichnungen dargestellt ist.Further properties and advantages of the device according to the invention result from the following description of an exemplary embodiment, which is shown in the drawings.

Dabei zeigen:

  • Fig. 1 eine perspektivische Ansicht einer Ueberwachungseinheit schräg von unten;
  • Fig. 2 ein schematisches Diagramm der Steuerstruktur einer Ueberwachungseinrichtung mit mehreren Ueberwachungseinheiten;
  • Fig. 3 eine Schnittansicht durch eine der zwei Schlitzöffnungen einer Ueberwachungseinheit;
  • Fig. 4 eine perspektivische Ansicht eines Sicherungsbügels, welcher die Aufhängung einer Ueberwachungseinheit umgreift;
  • Fig. 5 die Kupplung zwischen Ueberwachungseinheit und Aufhängung, und
  • Fig. 6 einen Schnitt durch die Befestigung des Sicherungsbügels im Gehäuse einer Ueberwachugseinheit.
Show:
  • Figure 1 is a perspective view of a monitoring unit obliquely from below.
  • 2 shows a schematic diagram of the control structure of a monitoring device with a plurality of monitoring units;
  • 3 shows a sectional view through one of the two slot openings of a monitoring unit;
  • FIG. 4 shows a perspective view of a securing bracket which surrounds the suspension of a monitoring unit;
  • Fig. 5 shows the coupling between the monitoring unit and suspension, and
  • 6 shows a section through the fastening of the securing bracket in the housing of a monitoring unit.

In Fig. 1 ist zunächst eine einzelne Ueberwachungseinheit 1 in ihrer äusseren Gestalt dargestellt. Deren Ausgestaltung ist insofern von Bedeutung, als von ihr auf potentielle Diebe eine möglichst grosse Abschreckungswirkung erzielt werden soll. Die Ueberwachungseinheit besitzt ein Gehäuse 10, in welchem die gesamte Mechanik und Elektronik als selbsttragende Funktionseinheit 11 (vgl. Fig. 3) untergebracht ist. Die Funktionseinheit 11 ist über eine noch zu beschreibende elektrisch-mechanische Schnellkupplung 20 (Fig. 5) mit einer Aufhängung 12 verbunden, welche fest an der Decke eines Lokals angeordnet ist.1 shows a single monitoring unit 1 in its outer shape. Their design is important insofar as it is intended to have the greatest possible deterrent effect on potential thieves. The monitoring unit has a housing 10 in which the entire mechanics and electronics are accommodated as a self-supporting functional unit 11 (cf. FIG. 3). The functional unit 11 is connected via an electrical-mechanical quick coupling 20 (FIG. 5) to be described, to a suspension 12, which is fixedly arranged on the ceiling of a restaurant.

Das Gehäuse 10 besitzt zwei parallele, nebeneinanderliegende Schlitzöffnungen 14, welche sich über einen untenliegenden Kreissektor von ca. 180° erstrecken. Durch diese Schlitzöffnungen 14 sind von aussen zwei Jalousien 15 wahrnehmbar, in denen auf jeder Seite jeweils ein Kameraobjektiv 16 bzw. eine Attrappe und ein Lautsprecher 17 bzw. eine Attrappe angeordnet sind. Kameraobjektive 16 und Lautsprecher 17 sind zusammen mit den Jalousien 15 längs der Schlitze schwenkbar, und zwar zwischen einer fast horizontalen und einer steil nach unten gerichteten Lage (vgl. Fig. 3).The housing 10 has two parallel, adjacent slot openings 14, which extend over an underlying circular sector of approximately 180 °. Through these slit openings 14 two blinds 15 can be seen from the outside, in each of which a camera lens 16 or a dummy and a loudspeaker 17 or a dummy are arranged on each side. Camera lenses 16 and loudspeakers 17, together with the blinds 15, can be pivoted along the slots, namely between an almost horizontal and a steeply downward position (cf. FIG. 3).

Die Anordnung ist so getroffen, dass ein Dieb annehmen muss, jedes Kameraobjektiv 16 (bzw. Attrappe) sei über die ganze Schlitzöffnung, d.h. den vollen Sektor von 180° schwenkbar, indem er die untere Lagebegrenzung nicht erkennen kann. Parallel zu jedem Kameraobjektiv 16 wird jeweils der Lautsprecher 17 verschwenkt. Der bewegliche Lautsprecher wirkt auf den Dieb abschreckend, weil er annehmen muss, dass nach Ertappung ein zielgerichteter Alarm ausgelöst wird.The arrangement is such that a thief has to assume that each camera lens 16 (or dummy) can be pivoted through the entire slit opening, ie the full sector, by 180 ° by not being able to recognize the lower position limit. The loudspeaker 17 is pivoted parallel to each camera lens 16. The moveable speaker acts as a deterrent to the thief because he has to assume that a targeted alarm will be triggered after being caught.

Die ganze Anordnung ist um die Aufhängung 12 drehbar. Wie sich aus Fig. 1 ergibt, scheinen die seitlichen Bereiche bei einer bestimmten Drehlage ausser Beobachtung zu liegen. Aus diesem Grund sind seitlich der beiden Schlitzöffnungen 14 am Gehäuse 10 kameraartige Ausbuchtungen 18 mit einem unten liegenden dunklen Fenster 13 angeordnet. Hinter dem Fenster 13 kann eine Leuchtdiode oder dergleichen angeordnet sein, welche den Eindruck einer aktiven Beobachtung erweckt.The entire arrangement is rotatable about the suspension 12. As can be seen from FIG. 1, the lateral areas appear to be out of observation at a certain rotational position. For this reason, camera-like protrusions 18 with a dark window 13 below are arranged on the side of the two slot openings 14 on the housing 10. A light-emitting diode or the like can be arranged behind the window 13, which gives the impression of active observation.

In jeder Ueberwachungseinheit 1 ist höchstens eine Videokamera, vorzugsweise eine Farbkamera 19, vorgesehen. Sind mehrere Ueberwachungseinheiten vorgesehen, so können wahlweise entweder alle oder nur ein Teil mit Kameras bestückt sein. Die unbestückten Ueberwachungseinheiten besitzen lediglich nach Programm schwenkbare Objektivattrappen. Je nach Bedarf, z.B. um die Ueberwachung der Umplazierung des Sortimentes anzupassen, können die mit Kameras ausgerüsteten Einheiten mit anderen vertauscht werden. Um dies zu gestatten, ist eine Schnellkupplung 20 zwischen den Ueberwachungseinheiten 1 und den fest im Lokal montierten Aufhängungen 12 vorgesehen, mittels welcher zugleich die mechanische wie die elektrische Verbindung herstellbar ist. Hierzu ist unten an jeder Aufhängung 12 eine Ueberwurfmutter 21 vorgesehen, welche über einen Kupplungsteil 22 an der Ueberwachungseinheit befestigbar ist. Der Kupplungsteil 22 bleibt ortsfest, während die Funktionseinheit 11 im Gehäuseinnern am Steckerteil 22 gelagert und mittels einem ersten Motor M1 gegenüber diesem drehbar ist.A maximum of one video camera, preferably a color camera 19, is provided in each monitoring unit 1. If several monitoring units are provided, either all or only a part can be equipped with cameras. The bare monitoring units only have dummies that can be swiveled according to the program. Depending on your needs, e.g. In order to adapt the monitoring of the relocation of the range, the units equipped with cameras can be exchanged with others. In order to allow this, a quick coupling 20 is provided between the monitoring units 1 and the suspensions 12 permanently mounted in the location, by means of which the mechanical as well as the electrical connection can be established at the same time. For this purpose, a union nut 21 is provided at the bottom of each suspension 12, which can be fastened to the monitoring unit via a coupling part 22. The coupling part 22 remains stationary, while the functional unit 11 is mounted inside the housing on the plug part 22 and can be rotated with respect to the latter by means of a first motor M1.

Um zu vermeiden, dass beim Auswechseln oder im Betrieb Ueberwachungseinheiten 1 herunterfallen, ist am Gehäuse 10 ein Sicherheitsbügel 23 befestigt, der die Aufhängung 12 eng umgreift. Löst sich die Kupplung 20, so bleibt der Sicherheitsbügel 23 an der Ueberwurfmutter 21 hängen. Die Anordnung ist so getroffen, dass die Kupplung 20 nur geschlossen werden kann, wenn der Bügel 23 bereits in die Aufhängung 12 eingeführt ist, so dass schon während dem Montagevorgang die Sicherung gewährleistet ist. Da der Sicherheitsbügel eng an der Aufhängung 12 anliegt und sich gegenüber dieser zusammen mit der Ueberwachungseinheit 1 dreht, muss vermieden werden, dass der Bügel gegen die Aufhängung drückt und damit eine grosse Reibung bzw. Quietschgeräusche verursacht. Aus diesem Grund ist der Sicherheitsbügel 23, wie in Fig. 6 ersichtlich, leicht beweglich am Gehäuse 10 befestigt. Zu diesem Zweck ist eine Abstandshülse 24 vorgesehen, welche geringfügig dicker ist, als die Bügelwand, womit der Bügel am Gehäuse 10 zwangsweise locker befestigt ist.In order to avoid that monitoring units 1 fall down during replacement or during operation, a safety bracket 23 is fastened to the housing 10, which tightly encompasses the suspension 12. If the coupling 20 is released, the safety bracket 23 remains on the union nut 21 hang. The arrangement is such that the clutch 20 can only be closed when the bracket 23 has already been inserted into the suspension 12, so that securing is ensured even during the assembly process. Since the safety bracket lies closely against the suspension 12 and rotates relative to it together with the monitoring unit 1, it must be avoided that the bracket presses against the suspension and thus causes a great deal of friction or squeaking noise. For this reason, the safety bracket 23, as can be seen in FIG. 6, is fastened to the housing 10 in an easily movable manner. For this purpose, a spacer sleeve 24 is provided, which is slightly thicker than the bracket wall, with which the bracket is forcibly attached to the housing 10 loosely.

Es wurde bereits erwähnt, dass im Gehäuse 10 jeder Ueberwachungseinheit 1 eine Funktionseinheit 11 angeordnet ist, welche drehbar am Kupplungsteil 22 aufgehängt ist. Die Funktionseinheit 11 besitzt einen Tragteil 30 mit zwei aussen liegenden Halteplatten 31 und zwei zentralen Streben 32. Auf beiden Seiten ist zwischen den Streben 32 und den Halteplatten 31 je eine Wippe 33 angeordnet.It has already been mentioned that in the housing 10 of each monitoring unit 1 there is a functional unit 11 which is rotatably suspended on the coupling part 22. The functional unit 11 has a support part 30 with two outer holding plates 31 and two central struts 32. A rocker 33 is arranged on each side between the struts 32 and the holding plates 31.

In Fig. 3 ist nur die eine der zwei Wippen 33 ersichtlich. Die Wippen sind auf einer Schwenkachse 34 im Tragteil 30 gelagert. Im Tragteil ist ferner ein Schwenkmotor M2 (in Fig. 3 nicht ersichtlich) angeordnet, mittels welchem die Wippen 33 schwenkbar sind. An den Wippen sind jeweils die kreisförmig gebogenen Deckbleche 15 mit Kameraobjektiven 16 und Lautsprechern 17 angeordnet. Auf einer der Wippen kann ferner die Videokamera 19 befestigt werden.In Fig. 3 only one of the two rockers 33 can be seen. The rockers are mounted on a pivot axis 34 in the support part 30. A swivel motor M2 (not shown in FIG. 3) is also arranged in the support part, by means of which the rockers 33 can be swiveled. The circularly curved cover plates 15 with camera lenses 16 and loudspeakers 17 are arranged on the rockers. The video camera 19 can also be attached to one of the rockers.

Wie sich daraus ergibt, können mit zwei Motoren M1 und M2 (vgl. Fig. 2) pro Ueberwachungseinheit sämtliche Dreh- und Schwenkbewegungen ausgeführt werden. Als Motoren werden vorzugsweise Schrittmotoren eingesetzt, welche inkremental gesteuert werden. Die Geschwindigkeit von Drehmotor M1 als auch von Schwenkmotor M2 kann damit rechnergesteuert stufenlos und wahlweise angepasst werden. Ferner ist sowohl vertikal als auch horizontal eine Verstellung zwischen je 99 vorprogrammierten und jederzeit änderbaren Positionen möglich. Dank der Schrittmotoren kann jede gewählte Stellung exakt reproduziert werden, was insbesondere für Zoom-Einstellungen der Kamera wesentlich ist. Die Kamera 19 ist deshalb vorzugsweise mit einem verstellbaren Zoom-Objektiv für veränderliche Brennweiten und Bildausschnitte ausgerüstet, wobei die Zoomstellung für jede programmierte Position ebenfalls vorprogrammierbar ist.As can be seen from this, with two motors M1 and M2 (cf. FIG. 2), all rotating and swiveling movements can be carried out per monitoring unit. Stepper motors which are controlled incrementally are preferably used as motors. The speed of rotary motor M1 as well as swivel motor M2 can thus be infinitely and optionally adjusted by computer control. Furthermore, vertical and horizontal adjustment between 99 preprogrammed positions that can be changed at any time is possible. Thanks to the stepper motors, each selected position can be reproduced exactly, which is particularly important for the zoom settings of the camera. The camera 19 is therefore preferably equipped with an adjustable zoom lens for variable focal lengths and image sections, the zoom position also being preprogrammable for each programmed position.

Zur erwähnten Steuerung ist jede Ueberwachungseinheit 1 über die Aufhängung 12 mit einer zentralen Steuervorrichtung 40 verbunden, welche in einem Ueberwachungsraum angeordnet ist (vgl. Fig. 2). Die Anordnung ist dabei so getroffen, dass alle Ueberwachungseinheiten an zwei parallel gezogenen Leitungen 41 angeschlossen sind, was gegenüber früheren, sternförmigen Verbindungen eine wesentlich einfachere Installation erlaubt.For the control mentioned, each monitoring unit 1 is connected via the suspension 12 to a central control device 40 which is arranged in a monitoring room (cf. FIG. 2). The arrangement is such that all monitoring units are connected to two lines 41 drawn in parallel, which allows a much simpler installation than previous star-shaped connections.

Die zentrale Steuervorrichtung 40 besitzt einen Rechner 42 mit Eingabe-/Ausgabeinheit 43. Ein Videoswitch 44 mit zwei unabhängigen programmierbaren Programmeinheiten dient zum Umschalten und Zusammenschalten eines Videogerätes 45, der Kameras 19 und der Monitoren 46,47, von denen einer im Ueberwachungsraum und einer oder mehrere im überwachten Lokal selbst aufgestellt sind. Das auf dem Monitor 46 darstellbare Ueberwachungsprogramm kann somit unabhängig von dem auf dem öffentlichen Monitor 47 sichtbaren Programm programmiert werden. Während der Monitor 47 im Ueberwachungsraum z.B. gemäss einer bestimmten Sequenz die Bilder der jeweils in Betrieb befindlichen Kamera 19 überträgt, können mittels dem Videoswitch und dem Videogerät 45 auf dem Monitor 46 im überwachten Lokal gespeicherte Ueberwachungsszenen aus den verschiedenen Standorten der gerade nicht aktiven Kameras gemischt mit Echtzeitbildern eingespielt werden. Auf dem Monitor 46 erscheinen damit abwechselnd Echtzeitbilder der gerade aktiven Kamera und früher aufgenommene, gespeicherte Bilder aus den Perspektiven der nicht aktiven Ueberwachungseinheiten. Beim potentiellen Dieb entsteht so der Eindruck, dass alle Ueberwachungseinheiten aktiv sind, so dass nicht aktive Einheiten nicht erkannt werden können.The central control device 40 has a computer 42 with an input / output unit 43. A videoswitch 44 with two independent programmable program units is used to switch and interconnect a video device 45, the cameras 19 and the monitors 46, 47, one of which is in the monitoring room and one or several are set up in the monitored premises themselves. The monitoring program which can be displayed on the monitor 46 can thus be programmed independently of the program which is visible on the public monitor 47. While the monitor 47 in the surveillance room transmits the images of the camera 19 that is in operation, for example in accordance with a specific sequence, the video switch and the video device 45 on the monitor 46 can be used to mix surveillance scenes stored in the monitored location from the different locations of the currently inactive cameras can be imported with real-time images. Realtime images of the currently active camera and previously recorded, stored images from the perspectives of the non-active monitoring units thus alternately appear on the monitor 46. The potential thief thus has the impression that all monitoring units are active, so that inactive units cannot be recognized.

Die entsprechenden Steuerprogramme können mittels der Eingabe-/Ausgabeeinheit 43 erstellt und in einem einsteckbaren RAM-Speicher 51 von z.B. 32 K-bytes Speicherkapazität gespeichert werden. Es können damit in einer bestehenden Ueberwachungseinrichtung mehrere unterschiedliche Ueberwachungsprogramme einfach gegeneinander ausgetauscht und z.B. einem Wechsel der aktiven Ueberwachungseinheit 1 angepasst werden. In jedem Speicher 51 kann ein Programm mit bis zu 99 unterschiedlichen Positionen der Ueberwachungseinheiten gespeichert werden. Da die Speicher 51 auswechselbar sind, ist die Anzahl der erzielbaren Positionen der Uebewachungseinheiten grundsätzlich unbeschränkt. Die Ein- und Ausgabeeinheit 43 besitzt eine Eingabetastatur 48 sowie eine alphanumerische Anzeige 49, auf welcher die jeweils aktive Ueberwachungseinheit 1 zur Erleichterung der Bedienung in Worten bezeichnet wird.The corresponding control programs can be created by means of the input / output unit 43 and stored in a plug-in RAM memory 51 of e.g. 32 K bytes of storage capacity can be saved. In an existing monitoring device, several different monitoring programs can be easily exchanged and e.g. can be adapted to a change in the active monitoring unit 1. A program with up to 99 different positions of the monitoring units can be stored in each memory 51. Since the memories 51 can be replaced, the number of positions of the monitoring units that can be achieved is fundamentally unlimited. The input and output unit 43 has an input keyboard 48 and an alphanumeric display 49, on which the respectively active monitoring unit 1 is labeled in words to facilitate operation.

Die zentrale Steuereinheit 40 besitzt daneben in herkömmlicher Weise auch Mittel zur Handsteuerung. Ferner kann die Steuerung der Ueberwachungseinheiten 1 auch extern ausgelöst werden. Hierzu können an die Steuereinheit 40 Schalter S₁, S₂.. angeschlossen sein, die im überwachten Lokal in Form von Lichtschranken, Näherungschaltern, sowie Alarm-Stückgutsicherungs-oder anderen Warensicherungssystemen angeodnet sind. Wird ein solcher Schalter (z.B. S₁) ausgelöst, so schwenkt eine oder mehrere der Ueberwachungseinheiten 1 nach Programm auf die entsprechende Stelle. Mit dem dann ebenfalls aktivierten Videogerät 45 kann in diesem Fall ein Bild des Diebs augenommen werden.The central control unit 40 also has, in a conventional manner, means for manual control. Furthermore, the control of the monitoring units 1 can also be triggered externally. For this purpose, switches S 1, S 2 .. can be connected to the control unit 40, which are anodized in the monitored premises in the form of light barriers, proximity switches, and alarm cargo or other goods security systems. If such a switch (eg S₁) is triggered, one or more of the monitoring units 1 swings according to the program to the corresponding point. With the video device then also activated In this case an image of the thief can be taken.

Dieselbe Einrichtung kann auch als Kundeninformationsmittel benutzt werden, indem z.B. bei der externen Auslösung eines Schalters S₁, S₂ etc. über die Lautsprecher 17 der entsprechenden Ueberwachungseinheit 1 eine Kundeninformation betreffend die jeweiligen Produkte übermittelt wird. Ist in diesem Bereich ein Monitor 46 vorgesehen, kann zudem auf diesem Monitor statt der Ueberwachungsbilder ein Informationsfilm abgespielt werden. Ein solcher Informationsfilm kann z.B. durch den Kunden selbst durch die Betätigung eines entsprechenden Schalters S₁ ausgelöst werden.The same device can also be used as customer information means, e.g. upon external triggering of a switch S 1, S 2, etc., customer information relating to the respective products is transmitted via the loudspeakers 17 of the corresponding monitoring unit 1. If a monitor 46 is provided in this area, an information film can also be played on this monitor instead of the surveillance images. Such an information film can e.g. are triggered by the customer himself by actuating a corresponding switch S 1.

An der Ein- und Ausgabeeinheit 43 ist ein Mikrofon 50 vorgesehen, über welches die Kontrollperson mit dem Lautsprecher 17 der entsprechenden Ueberwachungseinheit einen Kunden individuell ansprechen kann. In diesem Fall erscheint auf dem entsprechenden Monitor 46 vorzugsweise das Bild der sprechenden Person, wozu im Ueberwachungsraum ebenfalls eine Videokamera (nicht dargestellt) vorgesehen sein kann.A microphone 50 is provided on the input and output unit 43, via which the control person can use the loudspeaker 17 of the corresponding monitoring unit to address a customer individually. In this case, the image of the speaking person preferably appears on the corresponding monitor 46, for which purpose a video camera (not shown) can also be provided in the monitoring room.

Zusätzlich zum Lautsrpecher ist an der Ueberwachungseinheit ein (Richt-) Mikrofon angeordnet, über welches der Kunde mit der Bedienungsperson in Kommunikation treten kann.In addition to the loudspeaker, a (directional) microphone is arranged on the monitoring unit, via which the customer can communicate with the operator.

Der Schaltungsaufbau im einzelnen entspricht der heute bekannten Technik und braucht nicht im Detail beschrieben zu werden. In der zentralen Steuervorrichtung ist ein Prozessor 42 mit den beschriebenen Ein-/Ausgabe- und Speichermöglichkeiten vorgesehen, der als Master im Master-Slave-Betrieb mit lokalen Prozessoren 9 in den Ueberwachungseinheiten 1 zusammenwirkt. Er übermittelt diesen ihre jeweiligen individuellen Betriebsprogramme, wonach sie die einzelnen Komponenten individuell steuern.The circuit structure in detail corresponds to the technology known today and need not be described in detail. A processor 42 with the described input / output and storage options is provided in the central control device, which cooperates as a master in master-slave operation with local processors 9 in the monitoring units 1. He sends them their respective individual operating programs, after which they control the individual components individually.

Insgesamt gestattet die beschriebene Ueberwachungseinrichtung einen vielseitigen Einsatz, welcher optimale Abschreckung mit sehr guten Ueberwachungsmöglichkeiten verbinden. Zudem kann es als Informations-und/oder Alarmmittel eingesetzt werden.Overall, the monitoring device described allows a versatile use, which optimal deterrence with very good monitoring options connect. It can also be used as information and / or alarm means.

Claims (10)

Optische Ueberwachungseinrichtung mit mehreren, um eine Aufhängung (12) drehbaren Ueberwachungseinheiten (1), wobei jede Ueberwachungseinheit (1) ein Gehäuse (10) zur schwenkbaren Aufnahme mindestens einer Kamera besitzt, von der nach aussen lediglich das Objektiv (16) wahrnehmbar ist und wobei ferner an jedem Gehäuse Objektivattrappen schwenkbar angeordnet sind, sowie mit einer den Ueberwachungseinheiten gemeinsamen Vorrichtung (40) zum Steuern von Kamera- und Bewegungsfunktionen, dadurch gekennzeichnet, dass jede Ueberwachungseinheit (1) einen Kupplungsteil (22) aufweist, das mittels einer mechanischelektrischen Schnellkupplung (20) mit der Aufhängung (12) lösbar verbindbar ist, wobei das Gehäuse mittels einem Motor (M1) um den Kupplungsteil drehbar ist.Optical monitoring device with a plurality of monitoring units (1) which can be rotated about a suspension (12), each monitoring unit (1) having a housing (10) for pivotably accommodating at least one camera, from which only the lens (16) can be seen from the outside, and wherein lens dummies are also pivotally arranged on each housing, and with a device (40) for controlling camera and movement functions common to the monitoring units, characterized in that each monitoring unit (1) has a coupling part (22) which is connected by means of a mechanical-electrical quick coupling (20 ) can be detachably connected to the suspension (12), the housing being rotatable about the coupling part by means of a motor (M1). Optische Ueberwachungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass am Gehäuse (10) jeder Ueberwachungseinheit ein Sicherungsbügel (23) angeordnet ist, der beim Schliessen und Lösen der Schnellkupplung (20) sowie bei geschlossener Schnellkupplung die Aufhängung (12) derart umgreift, dass er bei Versagen der Kupplung durch die Aufhängung gehalten wird.Optical monitoring device according to claim 1, characterized in that a securing bracket (23) is arranged on the housing (10) of each monitoring unit and engages around the suspension (12) in such a way that when the quick coupling (20) is closed and released and when the quick coupling is closed, that it engages with Failure of the clutch is held up by the suspension. Optische Ueberwachungseinrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass alle Ueberwachungseinheiten (1) über zwei Kabel, ein Kabel (41) zur Uebertragung von Steuersignalen und akustischen Signalen, sowie ein Kabel für Videosignale mit der gemeinsamen Steuereinrichtung (40) verbunden sind, deren Anschlüsse in die Schnellkupplung (20) integriert sind.Optical monitoring device according to one of the preceding claims, characterized in that all monitoring units (1) are connected to the common control device (40) via two cables, a cable (41) for transmitting control signals and acoustic signals, and a cable for video signals Connections are integrated in the quick coupling (20). Optische Ueberwachungseinrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Dreh- und der Objektiv-Schwenkwinkel jeder Ueberwachungseinheit (1) mittels der Steuereinrichtung (40) individuell steuerbar und programmierbar ist, wobei die Steuereinrichtung (40) einen programmierbaren Rechner aufweist, und dass die jeweiligen Betriebsprogramme je in einem programmierbaren Steckspeicher (47) speicherbar und gemäss der jeweiligen Anordnung der Ueberwachungseinheiten austauschbar sind.Optical monitoring device according to one of the preceding claims, characterized in that the rotation and the lens pivot angle of each monitoring unit (1) by means of the control device (40) is individually controllable and programmable, the control device (40) having a programmable computer and the respective operating programs each being storable in a programmable plug-in memory (47) and being exchangeable in accordance with the respective arrangement of the monitoring units. Optische Ueberwachungseinrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass an die Steuereinrichtung (40) externe Schaltvorrichtungen (S₁, S₂) anschliessbar sind, bei deren Auslösung jeweils eine oder mehrere Ueberwachungseinheiten (1) eine entsprechende, vorprogrammierbare Dreh- und Schwenklage annehmen.Optical monitoring device according to one of the preceding claims, characterized in that external switching devices (S₁, S₂) can be connected to the control device (40), when triggered one or more monitoring units (1) each assume a corresponding, programmable rotational and swivel position. Optische Ueberwachungseinrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die externen Schaltvorrichtungen (S₁, S₂) als Berührungsschalter, Lichtschranken oder mit Alarm-Stückgutsicherungen oder anderen Warensicherungssystemen gekoppelte Schalter ausgebildet sind.Optical monitoring device according to claim 5, characterized in that the external switching devices (S₁, S₂) are designed as touch switches, light barriers or switches coupled with alarm general cargo security or other goods security systems. Optische Ueberwachungseinrichung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass ferner an jedem Gehäuse (10) mindestens ein Lautsprecher bzw. eine Lautsprecherattrappe (17) angeordnet ist.Optical monitoring device according to one of the preceding claims, characterized in that at least one loudspeaker or a dummy loudspeaker (17) is also arranged on each housing (10). Optische Ueberwachungseinrichtung nach Anspruch 7, dadurch gekennzeichnet, dass im Gehäuse (10) jeder Uebervachungseinheit zwei parallel zueinander verlaufende, sich jeweils über einen untenliegenden Kreissektor erstreckende Schlitzöffnungen (14) vorgesehen sind, wobei in jeder Schlitzöffnung ein Kameraobjektiv bzw. Objektivattrappe (16) sowie ein Lautsprecher bzw. eine Lautsprecherattrappe (17) angeordnet und mindestens über einen Teil des Kreissektors schwenkbar sind.Optical monitoring device according to claim 7, characterized in that in the housing (10) of each monitoring unit, two slit openings (14) running parallel to one another and each extending over an underlying circular sector are provided, with a camera lens or dummy object (16) and a slit in each slit opening Loudspeakers or a dummy dummy (17) are arranged and can be pivoted at least over part of the circular sector. Optische Ueberwachungseinrichtung nach Anspruch 8, dadurch gekennzeichnet, dass innerhalb des Gehäuses jeder Ueberwachungseinheit eine schwenkbar gelagerte Wippenanordnung (33) vorgesehen ist, welche mittels eines Schwenkmotors (M2) gemäss Steuerbefehlen der Steuervorrichtung (40) in definierte Schwenklagen bringbar ist und an welcher Kamera, Objektive bzw. Attrappen und Lautsprecher angeordnet sind.Optical monitoring device according to claim 8, characterized in that a pivotably mounted rocker arrangement (33) is provided within the housing of each monitoring unit, which by means of a swivel motor (M2) according to control commands of the control device (40) can be brought into defined swivel positions and on which camera, lenses or dummies and loudspeakers are arranged. Optische Ueberwachungseinrichtung nach einem der vorangehenden Ansprüche 7 bis 9, dadurch gekennzeichnet, dass in jeder Ueberwachungseinheit (17) das Kameraobjektiv (16)und ein Lautsprecher (17) in einer gemeinsamen Ebene parallel zur Drehachse der Aufhängung (12) schwenkbar angeordnet sind und dass eine Objektivattrappe(16) und ein zweiter Lautsprecher (18) in einer versetzten Parallelebene schwenkbar angeordnet sind, wobei Objektive und Lautsprecher gegengleich so angeordnet sind, dass jeweils nach einer Seite ein Objektiv und ein danebenliegender Lautsprecher in Erscheinung treten.Optical monitoring device according to one of the preceding claims 7 to 9, characterized in that in each monitoring unit (17) the camera lens (16) and a loudspeaker (17) are pivotably arranged in a common plane parallel to the axis of rotation of the suspension (12) and that a Dummy lens (16) and a second loudspeaker (18) are arranged pivotably in an offset parallel plane, lenses and loudspeakers being arranged opposite one another in such a way that a lens and a loudspeaker lying next to it appear on each side.
EP91101423A 1990-02-13 1991-02-04 Optical monitoring device Expired - Lifetime EP0442338B1 (en)

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CH450/90A CH679813A5 (en) 1990-02-13 1990-02-13
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CH (1) CH679813A5 (en)
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US5204742A (en) 1993-04-20
DK0442338T3 (en) 1996-03-04
EP0442338B1 (en) 1995-10-11
DE59106638D1 (en) 1995-11-16
CH679813A5 (en) 1992-04-15
ATE129086T1 (en) 1995-10-15

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