EP4047162A1 - Window alarm system - Google Patents

Abstract

The invention relates to a window alarm system (1) for monitoring a window (2) having a blind and casement frame (20, 21), the casement frame (21) being openable and closable on the blind frame (20 ) is fastened, comprising a mounting base (10) that can be fastened to the casement (21) and has an electronic module (11), the mounting base (10) having a slot-shaped recess (12) for the passage of a locking pin (30) of the lock (3). and at least one sensor (35) communicating with the electronics module (11) is provided for determining the position of the locking pin (30) and position-dependent arming and disarming of the window alarm system, the sensor (35) being formed by a three-axis acceleration and magnetometer sensor and the electronics module (11) comprises an evaluation device for evaluating the measured values communicated by the sensor (35), derge designed so that the open position of the casement (21) and vibrations of the window (2) can also be determined from the measured values of the at least one sensor (35).

Description

The invention relates to a window alarm system for monitoring a window having a frame and casement frame, the casement frame being attached to the casement frame in an openable and closable manner by means of a locking device with displaceably guided locking pins, comprising a mounting base which can be fastened to the casement frame and having an electronics module, the mounting base having a slot-shaped Recess is formed for the passage of a locking pin of the lock and at least one communicating with the electronic module sensor for determining the position of the locking pin and position-dependent arming and disarming of the window alarm system is provided.

Window alarm systems of the type mentioned are known and are used to monitor a window against burglary attempts in which the casement locked on the frame by means of the locking devices in the closed position is opened by force.

From the generic DE 20 2018 103 872 U1 a window alarm system is known in which a locking pin of the locking device is guided in a slot-shaped recess in the mounting base and different positions of the locking pin, as are characteristic of an open, closed or tilted casement, are determined by means of a number of sensors, for example capacitive sensors, in order to properly closed sash to cause arming and unlocking to cause disarming of the known window alarm system. The actual opening monitoring takes place via a separate magnetic contact. Such a window alarm system is inexpensive to manufacture and easy to install on existing windows, but the Structural effort with several sensors for determining the position of the locking pin and for monitoring the opening could be improved.

The object of the invention is to further develop a window alarm system of the type mentioned at the outset in such a way that it overcomes the disadvantages of the prior art.

To solve the problem, a window alarm system according to the features of claim 1 is proposed according to the invention.

Advantageous refinements and developments of the invention are the subject matter of the dependent claims.

In order to achieve the stated object, it is proposed according to the invention that the sensor be formed by a three-axis acceleration and magnetometer sensor and that the electronics module include an evaluation device for evaluating the measured values communicated by the sensor, such that the open position of the casement frame can also be determined from the measured values of the sensor and vibrations of the window can be determined. According to the invention, a single sensor is used not only to determine the position of the locking pin, but also detects the open position of the casement and vibrations of the window. According to the invention, the number of sensors required is reduced to a minimum.

Within the scope of the invention it was found that such a multifunctional sensor can be formed by a three-axis acceleration and magnetometer sensor, such as is used for the implementation of compass functions in portable devices such as mobile phones, navigation devices and the like. An example of such a sensor that can be used within the scope of the invention is commercially available from STMicroelectronics under the designation LSM303AGR.

Such sensors are also known as magnetometer-compass modules and have two combined measuring devices, namely a 3-axis accelerometer and a magnetometer, in an extremely compact housing. The orientation of the gravitational field can be determined by means of the 3-axis accelerometer, whereby, according to the invention, by means of the suitably programmed evaluation device, the vertical orientation of the casement frame when the window is closed or open from an orientation of the casement frame running inclined to the vertical with the window tilted from the measurement data supplied by the sensor can be distinguished. In contrast, the magnetometer provided in the sensor provided according to the invention can detect both the positioning of the usually metal locking pin relative to the magnetometer and also the presence of a usually metal reinforcement profile in the window frame, whereby not only the position of the window handle connected to the locking device and the associated locking pin for an automatic Arming or disarming can be detected by the evaluation device, but also a correctly closed sash frame with system on the frame can be determined.

Due to the corresponding logic circuit of the evaluation device of the electronic module, the window alarm system according to the invention can therefore be activated automatically when the operating handle of the locking device is in the appropriate position and the casement is correctly closed and deactivated when the operating handle is operated to open the casement.

In addition, when the window alarm system is armed, continuous window shake monitoring can be performed using the 3-axis accelerometer. According to one embodiment of the invention, it is possible here to trigger an alarm from the electronics module if there are characteristic vibrations as part of an attempted break-in or if the glass breaks. On the other hand, can Vibrations that can be attributed to other causes, such as an impact on the glazing by knocking, a ball or a bird, can be reliably differentiated from glass breakage or an attempted break-in in the evaluation device based on their deviating vibration profile and the measurement data supplied by the sensor, in order to prevent false alarms avoid.

In the armed state, the window alarm system can also reliably detect opening of the sash frame using the existing magnetometer and trigger an alarm. Here, the fact is exploited that the plastic hollow profiles frequently used for the production of blind and casement frames have metallic reinforcement profiles inserted on the inside, the presence of which in the vicinity of the sensor can be determined by the magnetometer component. If the window is opened, for example, by breaking in, this measurable connection to the metallic reinforcement profile of the window frame breaks off and the evaluation device can trigger an alarm due to the changed measurement data from the sensor.

The window alarm system according to the invention is arranged in a manner known per se in the rebate area between the blind and casement frame, in which the locking pins, which are displaceably guided in the direction of the profile sections of the blind frame and casement frame, are also arranged in accordance with an actuating handle that is attached to the casement frame and can be rotated about an axis. Depending on the position of the actuating handle, the locking pins move into a locking plate attached to the window frame for the purpose of locking or out of it for the purpose of unlocking. The window alarm system according to the invention is positioned in relation to such a locking pin in such a way that it comes to rest within the slot-shaped recess and to this extent remains freely movable as intended. However, since the locking pin is positioned differently within the slot-shaped recess depending on the position of the operating handle, it can be determined by detecting the position of the locking pin within the slot-shaped recess by means of the sensor whether a user has moved the operating handle into the closed position or whether the Actuating handle is in an open position or in a so-called tilt and turn fitting in the tilted position. Accordingly, the arming of the window alarm system can take place via the electronic module with evaluation device in the closed position of the locking pin or be canceled in the open or tilted position. Each movement and change in position of the locking pin in the slot-shaped recess causes an associated characteristic change in the measured values of the sensor and can be determined and assigned via the evaluation device.

According to a further proposal of the invention, the electronics module includes a power supply and a signal transmitter. The power supply can in particular be at least one battery, while the signal generator can be formed, for example, from a piezo signal generator and/or a radio module, which can be integrated into a wireless alarm system or into a smart home environment .

For easy installation of the window alarm system according to the invention, it is proposed that the mounting base is designed with an adhesive layer on its side intended for the casement, so that the window alarm system according to the invention is easily glued to a suitable surface of the casement in the window rebate area, with a locking pin positioned in the slot-shaped recess becomes and passes through it.

Such sticking of the window alarm system according to the invention while receiving the locking pin in the slit-shaped recess can be made easier according to a further proposal of the invention by an assembly aid which has a circumference filling the slit-shaped recess and a bore hole accommodating the locking pin. For assembly, with the casement open, the assembly aid is placed in the first step by inserting the locking pin into the associated hole in the assembly aid. The window alarm system with the slot-shaped recess can then be placed on the assembly aid and already in place described manner are glued in the window rebate area, the introduced into the bore of the assembly aid locking pin is necessarily arranged in the intended position within the slot-shaped recess. The assembly aid can then be removed and the window alarm system is immediately ready for use. Placing the assembly aid on the locking pin and then attaching the window alarm system in the correct position can be made easier if the assembly aid has at least one holding means, for example an adhesive layer or at least one holding magnet, which holds the assembly aid in position on the locking pin in a removable manner.

According to the invention, it is possible to have a window or a French door with a fixed window frame and a casement attached to it in an openable and closable manner by means of the locking devices, between which a window is formed when the casement is closed, the locking devices having at least one locking plate arranged in the window and a sliding locking pin that can be brought into connection with it, to be equipped or retrofitted with a window alarm system that is not visible from the outside, in which such a window alarm system of the type explained above is arranged completely in the window rebate.

Figur 1

die Aufsicht auf ein Fensteralarmsystem;

Figur 2

die Seitenansicht des Fensteralarmsystems gemäß Figur 1;

Figur 3

in schematisierter Darstellung ein mit dem erfindungsgemäßen Fensteralarmsystem ausrüstbares Fenster;

Figur 4

eine Montagehilfe in der Aufsicht.

Further configurations and details of the invention are explained below with reference to the drawing, which shows an exemplary embodiment. Show it:

figure 1

supervising a window alarm system;

figure 2

the side view of the window alarm system according to figure 1 ;

figure 3

a schematic representation of a window that can be equipped with the window alarm system according to the invention;

figure 4

an assembly aid in the top view.

From the figure 3 a window 2 can be seen, which comprises a fixed frame 20 installed in a known manner in a masonry opening and a casement 21 which is movable by means of hinges 32, namely openable and tiltable, and which carries glazing. In the illustrated closed position of the casement 21 on the window frame 20, a circumferential cavity, which is also referred to as a window rebate 22, is formed between these.

Within this window rebate 22 is the locking device with a plurality of locking plates 3 fastened to the frame 20 on the rebate side and locking pins 30 that can be displaced in the casement frame 21 by means of a handle 31, the locking plates 3 being fastened to the window frame 20 on the rebate side and the locking pins 30 being displaced by displacement along a travel path in retract an associated locking plate 3 for the purpose of locking or move out of it in the opposite direction for the purpose of unlocking. This depends on the position of the actuating handle 31.

From the figure 1 is such a locking pin 30 to recognize one of the figure 3 Apparent striking plates 3 is assigned.

The locking pin 30 is included in a window alarm system 1, which as from figure 2 can be seen is dimensioned particularly flat and space-saving, so that it can be arranged completely within the window rebate 22 between the frame 20 and sash 21.

The window alarm system 1 comprises a body made of suitable plastic, for example, with a mounting base 10 that can be glued to the rebate-side edge of the casement 21 by means of an adhesive layer on the underside, not shown. An electronic module 11 connects on one side in the direction of the extension of a longitudinal axis marked with L, which has an acoustic signal generator, not shown in detail, in the form a piezo horn and a battery compartment for accommodating, for example, one or two button cells such as CR 2032.

In the area of the mounting base 10 there is a slot-shaped recess 12 running in the direction of the longitudinal axis L, which is dimensioned in such a way that the locking pin 30 can be received therethrough and, depending on the position of the operating handle 31, can move along the longitudinal axis L as intended and without being influenced . The window alarm system 1 dimensioned in this way is permanently attached to the sash frame 21 on the rebate side.

A sensor 35 is arranged at a suitable point approximately in the central area of the longitudinal extension of the slot-shaped recess 12 and can be applied to the mounting base 10 or embedded in it, for example. The sensor 35 is a combined 3-axis acceleration and magnetometer, such as that commercially available from STMicroelectronics under the designation LSM303AGR. The sensor 35 communicates with the electronics module 11 via an evaluation device, not shown in detail, the evaluation device evaluating the measured values of the sensor 35 according to a corresponding programming and transmitting them to the electronics module.

Such a sensor 35 combines a classic 3-axis accelerometer with a 3-axis magnetometer.

It has been shown within the scope of the invention that with such a sensor 35 the position of the locking pin 30 along its travel path can be reliably determined by the evaluation device, for example that in FIG figure 1 shown central position, which is usually associated with the open position of the window 2, and the two end positions of the locking pin 30 at the longitudinal ends of the slot-shaped recess 12, which are associated with the tilted position or the closed position of the casement 21, in which the locking pin in a locking plate 3 retracts lockingly. Every Movement of the locking pin 30 is detected by the sensor 35 with a clear measured value output.

It is thus possible through the evaluation device of the electronics module 11 to disarm the window alarm system 1 when the locking pin 30 is in the open or tilted position within the slot-shaped recess 12 .

On the other hand, when the locking pin 30 is in the closed position within the slot-shaped recess 12, the evaluation device of the electronics module 11 can cause arming, provided that the correct locking position of the casement 21 relative to the window frame 20 is also verified via the magnetometer function of the sensor 35, since from the usually within the Frame 20 extending metallic reinforcement profile a clear signal value is measured. The absence of this signal value despite locking pin 30 being in the closed position indicates that the window is not correctly closed and can therefore be reported to electronic module 11 accordingly.

However, as soon as the window alarm system 1 has been activated with the casement 21 closed, the opening can be monitored reliably, since the magnetic contact between the sensor 35 and the reinforcing profile of the window frame 20 is changed during an attempted break-in, so that the electronic module 11 can issue a corresponding alarm .

To this extent, the window alarm system 1 is automatically armed whenever the actuating handle 31 is moved into the closed position and the casement 21 is locked on the frame 20, and disarmed when the actuating handle 31 is moved again into the open or tilted position.

By means of the 3-axis acceleration measuring device present in the sensor 35, it is also possible Vibrations of the window 2 are detected and evaluated. It is thus possible to detect vibrations typical of an attempted break-in or vibrations typical of glass breakage in the evaluation device and to issue an alarm via the electronic module 11, while other vibrations, for example caused by knocking or hitting a ball or a bird, due to deviating characteristics of the measured values of the Sensor 35 can be filtered out by the evaluation device to avoid false alarms.

Instead of or in addition to the acoustic signal generator, an alarm can also be output via a radio module, with which the window alarm system 1 can be integrated into a wireless alarm system or a smart home environment, so that a user can also receive status information about the closed, open window in addition to the alarm output or a tilted window, which can be clearly identified by the sensor 35.

For the simple and correct installation of the window alarm system 1 explained above, it is necessary to glue the mounting base 10 to the rebate area of the casement 21 in such a way that the locking pin 30 is in a defined position within the slot-shaped recess 12, for example the figure 1 visible center position is arranged with the casement 21 open.

To facilitate this positioning, one from the figure 4 Apparent adapter proposed as an assembly aid 4, which has a cuboid shape with a circumference 40 which can be accommodated exactly in the slot-shaped recess 12. A recess 41 for receiving the locking pin 30 is provided on the underside at the desired, for example middle, longitudinal extension position and the assembly aid 4 can be provided with holding means in the form of integrated magnets 42 and temporarily placed on the rebate area of the casement 21.

To install the window alarm system 1, the casement 21 is first opened so that the appropriate locking pin 30 is in the central position and the window rebate is accessible. The assembly aid 4 is then put on in such a way that the locking pin 30 is arranged in the associated recess 41 . In this position, the mounting aid 4 temporarily adheres to the sash frame 21 on the rebate side due to the integrated magnets 42. The window alarm system 1 with the slit-shaped recess 12 can then be slipped over the mounting aid 4 so that it comes to rest within the slit-shaped recess 12, with which the locking pin also automatically 30 is placed in the correct positioning. After the adhesive connection between the mounting base 10 and the casement 21 has been produced, the mounting aid 4 can be removed from the slot-shaped recess 12, as a result of which the window alarm system 1 is correctly positioned and immediately ready for use.

If desired, instead of just a single sensor 35, a combination of several such sensors 35 can also be provided in a window alarm system, whereby the measurement accuracy can be increased and, if necessary, redundancy can also be achieved to increase reliability.

Claims (8)

Window alarm system (1) for monitoring a window (2) having a blind and casement frame (20, 21), the casement frame (21) being openably and closably attached to the blind frame (20) by means of a locking device with displaceably guided locking pins (30), comprising a mounting base (10) which can be fastened to the leaf frame (21) and has an electronic module (11), the mounting base (10) being designed with a slot-shaped recess (12) for the passage of a locking pin (30) of the lock (3) and at least one with The electronic module (11) communicating sensor (35) is provided for determining the position of the locking pin (30) and position-dependent arming and disarming of the window alarm system, characterized in that the sensor (35) is formed by a three-axis acceleration and magnetometer sensor and the electronics module (11) comprises an evaluation device for evaluating the measured values communicated by the sensor (35), the design t that the open position of the casement (21) and vibrations of the window (2) can also be determined from the measured values of the at least one sensor (35). Window alarm system (1) according to Claim 1, characterized in that vibrations of the window (2) as a result of violent opening of the casement (21) and/or as a result of glass breakage can be determined by means of the evaluation device from the measured values of the at least one sensor (35) and vibrations of other origin are distinguishable. Window alarm system (1) according to one of Claims 1 or 2, characterized in that the electronics module (11) has a power supply and a signal generator. Window alarm system (1) according to Claim 3, characterized in that the signal generator comprises an acoustic signal generator and/or a radio module. Window alarm system (1) according to one of Claims 1 to 4, characterized in that the mounting base (10) is designed with an adhesive layer on its side intended for the casement frame (21). Window alarm system (1) according to one of the preceding claims, characterized by an associated assembly aid (4) which has a periphery (40) filling the slot-shaped recess (12) and a bore (41) accommodating the locking pin (30). Window alarm system according to Claim 6, characterized in that the assembly aid (4) has at least one retaining means (42) for detachable attachment to the casement frame (21). Window (2) or balcony door with a fixed blind frame (20) and a casement (21) attached to it in an openable and closable manner by means of a locking device, between which a window rebate (22) is formed when the casement frame (21) is closed, the locking device having at least one locking plate (3) arranged in the window rebate area (22) and a displaceable locking pin (30) that can be brought into operative connection therewith, characterized by a window alarm system (1) arranged completely in the window rebate (22) according to one of the preceding claims.

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