EP0299219A1 - Method and device for securing windows doors etc. against burglary - Google Patents

Abstract

If an intruder endeavours to push up the slats (10) of the roller shutter, the movement-sensitive detector (4) signals the movement of the slats to the alarm control unit (9). When the roller shutters are drawn up, the detector (5) monitors the front of the window with its field of vision. The field of vision is oriented parallel to the front of the window. Infrared movement alarms are used as detectors (4, 5). The detector (4) is in operation when the roller shutters are lowered and the detector (5) when the roller shutters are raised. Switching between the two detectors can take place automatically. <IMAGE>

Description

The invention relates to a method for burglar protection of windows, doors, gates or the like. Building openings or property entrances, which from the outside by means of roller shutters, folding shutters, blinds, gate leaves, gate segments, rolling grilles or the like. Covers are closable and a device for burglar protection by means of shutters, shutters, blinds, gate leaves, rolling grilles or the like. Building openings or property entrances, e.g. windows, doors, gates with e.g. horizontal segments, closable covers, e.g. Mounted above the window, door or gate frame for the cover, such as a roller shutter or jalousie box or gate cutouts.

The burglary statistics from the authorities show a very high entry rate for lower-lying windows of buildings, for example on the ground floor. Various mechanical devices, such as lockable window handles and roller shutters, are already known which are blocked by an additional mechanical device and offer a certain degree of protection in such a way that the potential perpetrator must consider a time delay. However, a simple lever device, such as a crowbar, is sufficient to effectively override these mechanical protection devices with considerable damage to the homeowner. If one takes into account that, according to the break-in statistics, the main break-in time is between 11:00 a.m. and 2:00 p.m., then it becomes clear that, for example, the roller shutter as the main mechanical protection is very likely not in function, i.e. raised. Conventional intruder alarm systems offer an effective one Protection by alerting the perpetrator, who is usually under psychological stress, acoustically or optically that his attempted break-in has been recognized, but these security systems incur considerable costs. In addition, the installation of such intrusion alarm systems is very complex and connected with a lot of dirt, since at least a few hundred meters of cable have to be laid inside the house. After assembly, therefore, must usually be renovated again. Likewise, the securing of gates, such as. Rolling gates, sectional gates, tilting gates, rolling grilles or the like. trained garage doors or gates of property access through conventional security systems associated with considerable installation and cost, which is multiplied by a subsequent installation.

Proceeding from this, the invention has for its object to provide a method and a device of the type described in more detail above, whereby windows, doors, gates or the like. Building openings or property entrances as main break-in points are reliably secured against break-ins, both with closed roller shutters , Gates and the like. Covers as well as with open roller shutters or gates and the like, and what can be installed or implemented retrospectively in buildings that have already been completed, with low initial costs and without great effort.

In terms of method, this object is essentially achieved by the invention in that movement of the cover is detected at least when the building opening is covered or the property access is closed by means of at least one motion-sensitive sensor.

The method according to the invention offers reliable burglary protection, in which it indicates a potential burglary attempt as it arises, for example if an attempt should be made to open a folding shutter or a garage door that is folded in front of a window or a door. The method according to the invention can also be easily implemented without great expenditure of time and money and is particularly suitable, in particular, for buildings or property entrances which have already been completed. Another advantage is that, in contrast to the known burglar alarms, false alarms by animals in front of the covers, such as dogs or cats, are excluded, since an alarm is only triggered when a potential burglar tries to lift the cover, fold it away or, for example. in the case of access to the property, slide the cover into a floor-side shaft. The method according to the invention also allows monitoring when the window, door or gate is only partially covered.

According to another concept of the invention, it is provided that at least when the building opening is not covered or the property access is not covered, the outer opening or access front is monitored as a control level by means of at least one, possibly further, movement-sensitive sensor, preferably aligned in the control level. As a result, reliable protection against burglary is achieved at all times of the day and night, both with and without a covered window, door or gate. In this case, a single, appropriately aligned sensor can be used to detect a movement of the cover when the window, door or partially closed gate is covered or partially covered, and for monitoring when the cover is folded away, pulled up or also shut down. Age natively, it is also possible to use at least one sensor for each of the two monitoring states.

According to a further idea of the invention, a passive infrared motion detector can be used at least for the at least one sensor that detects movement of the cover, with a dual sensor for temperature compensation that has two sensor crystals of opposite optical polarity, the one sensor crystal being behind one as such Imaging system serving slit is arranged that this sensor crystal alone takes over the monitoring function and together with the second sensor crystal accomplishes the required temperature compensation. As a result, commercially available components can be used, so that particularly low implementation costs of the method result. In terms of design, the optical imaging of the cover to be detected is also particularly simple due to the use of a slit diaphragm proposed according to the invention. Although the slit diaphragm leads to a blurred image, this has the advantage that small movements in the range between, for example, 1 to 2 cm do not yet trigger an alarm, since the signal values generated by these small movements are not sufficient to exceed a set alarm threshold . Only movements of the cover of, for example, 5 to 10 cm lead to reliable detection. This eliminates false alarms that could result from slight movements of the cover, for example as a result of weather influences.

In the case of a cover that can be automatically opened and closed by means of an actuating device, it is particularly favorable if an automatic arming / disarming of the respective sensor or motion detector is carried out by the control signals of the actuating device in such a way that when the opening or covered access is covered, the sensor or motion detector detecting a movement of the cover and when the opening is not covered or access is not covered the sensor or motion detector monitoring the monitoring level is focused. This ensures that the security system is in focus in any state of the cover, for example lowered or raised shutters or sectional doors, and that the operator cannot forget to switch over to the respective sensor or motion detector.

The at least two sensors or motion detectors are expediently connected to a common alarm center, optionally provided with a switch for arming / disarming the two sensors or motion detectors and preferably designed as a changeover switch, and optionally with a siren

In terms of process technology, it is also particularly favorable if microswitches are used as the sensor or sensors.

For a device for burglar protection, it is proposed according to the invention that at least one sensor for detecting the movement of the cover or its segments, at least when the building opening or the covered property access is covered, is arranged in or near the receptacle.

This means, for example, that a roller shutter is lowered or a sectional door is in the closed position monitored casually and safely against being pushed up. The device is inaccessible from the outside of the building and can be installed quickly and easily. It is also particularly suitable for retrofitting in buildings that have already been completed, or for receiving or recessing the covers, without the need for major renovation work afterwards. In addition to the advantages already mentioned for the method according to the invention, the device according to the invention is protected from the weather by its arrangement on or near the receptacle for the cover and is secured against access from the outside, so that the burglar alarm cannot be switched off from the outside.

The assembly and operational safety of the device can be further improved according to the invention if the at least one sensor is held on a part of the receptacle on the inside of the building and is pressed against a e.g. upper section of the cover or against e.g. upper segment of the cover is directed. Of course, it is also within the scope of the invention that in the case of access to the property, which can be closed by a gate that can be retracted in a bottom-side receptacle, the at least one sensor is arranged on or within the bottom-side receptacle and against a lower section of the cover or a lower one Segment of the cover is directed.

In the case of a roller shutter or blind box or, for example, a receptacle box for a sectional door, assembly is particularly simple if the at least one sensor is held on a rear wall of the receptacle inside the building and is directed towards the opposite segments located within the receptacle.

In terms of assembly technology, it is also particularly favorable if the at least one sensor, which may be arranged in a metal sleeve, can be inserted from the outside through a bore in the rear wall of the receptacle and, if appropriate, is held in the bore with its metal sleeve. Subsequent assembly then only requires a hole to be made by means of a conventional drilling machine, into which the sensor is inserted. To the inside of the building, however, the receptacle or the roller shutter box remains unchanged, so that there is no change or special shapes of curtain rods or the like. requirement.

A burglar alarm around the clock can be achieved if, as provided for according to a further idea of the invention, at least one, possibly further, movement-sensitive sensor for monitoring the opening or access front, at least when the opening or access is not covered or near the receptacle, the beam path of which is preferably oriented essentially parallel to the opening or access front as a control plane. Here, too, it is particularly advantageous that the sensor, which monitors the windows, door or gate front, for example when the roller shutters or rolling grilles are raised, is arranged on the inside of the building on or near the receptacle (protected from the weather) and is placed inaccessible from the outside of the building can, so that it cannot be put out of operation by a potential burglar. Alternatively, it is also possible to use only one appropriately aligned sensor for both monitoring states.

If a roller shutter or blind box or, for example, a receiving box for a sectional door or the like. is present, the at least one motion-sensitive sensor can be arranged within the receptacle with a beam path extending through an opening of the receptacle for the entry and exit of the segments, so that the sensor is optimally placed outwards and inwards.

According to a further concept of the invention, at least the at least one sensor that detects movement of the cover or its segments is designed as a passive infrared motion detector with a dual sensor having two sensor crystals of opposite optical polarity for temperature compensation, and a slit diaphragm is provided as the imaging system, which is arranged in front of the sensor or the motion detector such that one sensor crystal is congruent with the aperture of the slit diaphragm in the optical axis of the system, while the second sensor crystal is arranged outside the optical axis without direct visual contact with the cover or its segments, is preferably directed to the bottom of the receptacle. The use of a passive infrared motion detector together with a slit diaphragm as an optical imaging system leads to an inexpensive, simple and particularly reliable burglar alarm. Since a dual sensor type is used for temperature compensation of the infrared motion detector, it must be ensured that no signal compensation takes place due to the antipolarity of the two sensor crystals. This is advantageously achieved according to the invention in that a sensor crystal, which takes over the monitoring function alone, is arranged congruently with the slit diaphragm in the optical axis of the system, while the second sensor crystal lies completely outside the optical axis and is not in visual contact with the segments of the Cover is available, preferably directed towards the receiving floor.

Switching from one to the other sensor or motion detector for, for example, raised and lowered roller shutters is particularly easy in the case of a cover that can be actuated automatically, for example, can be raised and lowered, or retracted, when an automatic arming / disarming of the respective Sensor or motion detector by the control signals of the actuating device such that at, for example lowered cover of the sensor or motion detector which detects movement of the cover or its segments and in the case of e.g. the cover or sensor that monitors the opening or access front is in focus.

It is also particularly expedient if the at least two sensors or motion detectors of a common alarm center are connected, which, if appropriate, are equipped with a switch, preferably designed as a changeover switch, for manual arming / disarming of the two sensors or motion detectors and, if appropriate, with a siren is provided. This alarm center can, for example, be mounted on the inside wall of the building behind a curtain and can also be designed as a sabotage line.

It is particularly favorable in terms of assembly and maintenance if the sensor or sensors are designed as microswitches, so that commercially available and therefore inexpensive components can also be used.

Further objectives, features, advantages and possible uses of the present invention result from the following Description of an embodiment with reference to the drawing. All of the features described and or depicted in the figures, alone or in any meaningful combination, form the subject matter of the present invention, regardless of how they are summarized in the claims or their back-references

• Fig. 1 eine mögliche Ausführungsform einer erfindungsge­mäßen Einbruchssicherung für ein Fenster mit Rol­laden,
• Fig. 2 eine mögliche Ausführungsform der erfindungsgemäßen Anordnung einer Schlitzblende als optisches Abbil­dungssystem vor zwei Sensorkristallen eines Sensors gemäß Fig. 1 und
• Fig. 3 eine Seitenansicht des Sensors mit Schlitzblende gemäß Fig. 2.

Show it:

• 1 shows a possible embodiment of a burglar alarm according to the invention for a window with shutters,
• 2 shows a possible embodiment of the arrangement according to the invention of a slit diaphragm as an optical imaging system in front of two sensor crystals of a sensor according to FIGS. 1 and
• 3 shows a side view of the sensor with slit diaphragm according to FIG. 2.

1 shows a burglar alarm 1 for a window 2, which can be closed from the outside of the building by means of a cover 3 designed as a roller shutter. The cover 3 or the roller shutters is received in the raised state in a receptacle 11 which is embedded in the wall of the building above the window frame and is designed as a roller shutter box. The burglar alarm 1 itself consists of two sensors 4, 5 designed as passive infrared motion detectors, each with a dual sensor type having two sensor crystals 6, 7. A sensor 4, which together with the electronic ballast for shielding against electrical interference signals and for assembly reasons is expediently housed in a metal sleeve, inserted into a bore on the inside rear wall 12 of the receptacle 11 or the roller shutter box and possibly held in the bore with its metal sleeve. The sensor 4 is aligned so that the opposite, essentially horizontal segments 10 of the cover 3 or the roller shutter slats are in its field of vision. A movement of the segments 10 or roller shutter slats leads to a change in the heat radiation and thus to a signal at the sensor 4, which is forwarded via a feed line 15 to an alarm center 9 which is preferably mounted behind the curtain on the receptacle 11 or the roller shutter box. The lowered cover 3 or the roller shutter is thus monitored against being pushed up from the outside.

To image the segment 10 to be detected or the roller shutter slat, there is a slit diaphragm 8 at a distance L in front of the sensor window 17, as can be seen in particular from FIG. 3. This construction, which is much simpler than a lens, leads to a blurred image of the segment 10 to be detected, but has the advantage that small movements of the segment 10 due to weather influences in the range between 1 and 2 cm do not yet trigger an alarm, since the corresponding signal value is not sufficient to exceed the alarm threshold set on the alarm center 10. A signal is only triggered when the segments 10 move between 5 and 10 cm, which provides reliable detection for the roller shutter to be pushed up from the outside.

As can be seen particularly from FIG. 2, the two sensor crystals 6, 7 of the dual sensor used as a passive infrared motion detector or sensor 3, 4 lie horizontally on the optical axis and have an opposite optical polarity, which is indicated by the arrows in FIG Fig. 2 is indicated.

In this dual-sensor type used for temperature compensation of the infrared motion detector, it must be ensured that no signal compensation takes place due to the anti-parallelism of the two sensor crystals 6, 7. For this purpose, the one sensor crystal 7 is arranged congruently with the aperture 13 of the slit 8 in the optical axis of the system, while the second sensor crystal 7 lies completely outside the optical axis. The viewing angle α of the sensor crystal 7, which takes over the monitoring function alone, results in a first approximation from the distance L between the sensor window 17 and the slit diaphragm 8 and is chosen such that the second sensor crystal 6 has no direct visual contact with the segments 10 or roller shutter slats, by it is directed to the bottom 14 of the receptacle 11 or the bottom of the roller shutter box.

The second sensor 5, which is provided for monitoring the window front when the cover 3 is raised or the roller shutter is raised, is also protected against the weather, placed inside the receptacle 11 or the roller shutter box, the field of vision of which is also by means of a slit diaphragm through a slot-shaped opening in the receptacle 11 for the user - And outlet of the segments 10 is aligned essentially parallel to the window front. In the example selected here, the sensor 5 is also designed as a passive infrared motion detector with a dual sensor type, the arrangement of the Sensor 5 or its sensor crystals with an associated slit diaphragm which corresponds in FIG. 2, but with a displacement about the optical axis by 90 °. The sensor 5, which monitors the window front when the cover 3 or the roller shutters is raised, is also connected to the alarm center 9 via a feed line 16.

The arming / disarming of the two sensors 4, 5, which may be in the form of microswitches, is carried out either by a switch on the alarm center 9 or, for example, in the case of automatically operated shutters, by the control signals of the automatic shutters in such a way that the sensor 4 in when the shutters are shut down Operation is set and the sensor 5 is in focus when the roller shutter is raised. There is also the possibility of external disarming at the alarm center.

Reference symbol list:

• 1 burglar alarm
• 2 Windows
• 3 cover
• 4 sensor
• 5 sensor
• 6 sensor crystal
• 7 sensor crystal
• 8 slit diaphragm
• 9 alarm center
• 10 segment
• 11 recording
• 12 rear wall
• 13 aperture
• 14 bottom
• 15 supply line
• 16 supply line
• 17 sensor window

Claims (16)

1. Procedure for burglar protection of windows (2), doors, gates or the like. Building openings or property entrances, or the like by means of roller shutters, folding shutters, blinds, gate leaves, gate segments, rolling grilles or the like. Covers (3) can be closed, characterized in that a movement of the cover (3) is detected by at least one motion-sensitive sensor (4) at least when the building opening is covered or the property access is closed. 2. Procedure for burglar protection of windows (2), doors, gates or the like. Building openings or Grundsütck accesses, which by means of shutters, folding shutters, blinds, gate leaves, gate segments, rolling grilles or the like. Covers (3) can be closed, in particular according to claim 1, characterized in that, at least when the building opening is not covered or the building entrance is not covered, the outer opening or access front is monitored as a control level by means of at least one, possibly another, preferably aligned in the control level , movement-sensitive sensor (5). 3. The method according to claim 1 or 2, characterized in that at least for the at least one movement of the cover (3) detecting sensor (4) a passive infrared motion detector is used with a two sensor crystals (6, 7) of opposite optical polarity Having dual sensor for temperature compensation and that the one sensor crystal (7) is arranged behind a slit diaphragm (8) serving as an imaging system such that this sensor crystal (7) alone takes over the monitoring function and together with the second sensor crystal (6) the required temperature compensation accomplished. 4. The method according to any one of claims 2 to 3, characterized in that with an automatically openable and closable cover (3) by means of an actuating device, an automatic arming / disarming of the respective sensor (4, 5) or motion detector by the control signals the actuating device is such that when the opening or covered access is covered, the sensor (4) or motion detector which detects movement of the cover (3) and when the opening or covered access is not covered, the sensor (5) or motion detector monitoring the roofing level is armed is provided. 5. The method according to any one of claims 2 to 4, characterized in that the at least two sensors (4,5) or motion detectors of a common, optionally with a preferably designed as a switch for arming / disarming the two sensors (4th , 5) or motion detector and, if necessary, an alarm center (9) provided with a siren. 6. The method according to any one of claims 1 to 5, characterized in that microswitches are used as the sensor (4) or as sensors (4, 5). 7.Device for burglar protection by means of roller shutters, shutters, blinds, gate leaves, rolling grilles or the like, for example essentially horizontal, segments (10), covers (3) closable windows (2), doors, gates or the like Access to property with e.g. Above the window, door or gate frame, a receptacle (11) for the cover (3), such as, for example, a roller shutter or blind box or gate cutouts, in particular for carrying out the method according to one of claims 1 to 6, characterized in that at least a sensor (4) which detects a movement of the cover (3) or its segments (10) in or near the receptacle (11) is arranged at least when the building opening or property access is covered. 8. The device according to claim 7, characterized in that the at least one sensor (4) is held on a building-internal part of the receptacle (11) and against a e.g. upper section of the cover (3) or against an upper segment (10) of the cover (3). 9. The device according to claim 7 or 8, characterized in that the at least one sensor (4) on a building-side rear wall (12) of the receptacle (11) held and directed to the opposite, within the receptacle (11) located segments (10) is. 10. The device according to claim 9, characterized in that the at least one optionally arranged in a metal sleeve sensor (4) from the outside through a hole in the rear wall (12) of the receptacle (11) can be inserted and possibly in the hole with its metal sleeve is held. 11. Device for the security against burglary of shutters (3) which can be closed by means of roller shutters, folding shutters, blinds, gate leaves, rolling grilles or the like, for example essentially horizontal segments (10), windows (2), doors, gates or the like. Access to property with e.g. Above the window, door or gate frame, there is a receptacle (11) for the cover (3), such as, for example, a shutter or blind box or gate recess, in particular for carrying out a method according to one of claims 2 to 6 or according to one of the claims 7 to 11, characterized in that at least one, possibly further, movement-sensitive sensor (5) is provided on or near the receptacle (11) for monitoring the opening or access front as a control level, at least when the opening is not covered or the access is not covered, whose beam path is preferably aligned essentially parallel to the opening or access front as a control plane. 12. The apparatus according to claim 11, characterized in that the at least one motion-sensitive sensor (5) is arranged within the receptacle (11) with an extending through an opening of the receptacle (11) for the entry and exit of the segments (10) Beam path. 13. Device according to one of claims 7 to 12, characterized in that at least the at least one movement of the cover (3) or its segments (10) detecting sensor (4) is designed as a passive infrared motion detector with a two sensor crystals (6,7) opposite optical polarity dual sensor for temperature compensation and that a slit diaphragm (8) is provided as the imaging system, which is arranged in front of the sensor (4) or the motion detector that the one Sen Sork crystal (7) is congruent with the aperture (13) of the slit diaphragm (8) in the optical axis of the system, while the second sensor crystal (6) without direct visual contact with the cover (3) or its segments (10) outside the optical Axis arranged, preferably directed to the bottom (14) of the receptacle (11). 14. The device according to one of claims 11 to 13, characterized in that in an automatically operable by means of an actuating device, for example. Pullable and lowerable or retractable cover (3) an automatic arming / disarming of the respective sensor (4,5) or Motion detector by the control signals of the actuating device such that, for example with the cover (3) lowered, the sensor (4) or motion detector detecting a movement of the cover (3) or its segments (10) and with e.g. pulled up cover (3) the sensor (5) or motion detector monitoring the opening or access front is in focus. 15. The device according to one of claims 11 to 14, characterized in that the at least two sensors (4,5) or motion detectors of a common alarm center (9) are connected, which optionally with a preferably designed as a switch for manual arming - Disarming of the two sensors (4,5) or motion detector and possibly provided with a siren. 16. The device according to one of claims 8 to 15, characterized in that the one or more sensors (4, 5) are designed as microswitches.

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