EP3441952B1 - Retrofit burglary detection unit - Google Patents

Description

The present invention relates to a burglar detection unit for a window or a door which has a window frame, a wing which can be pivoted with respect to the window frame between a closed position and an open position and a rebate air which extends between the window frame and the wing.

A break-in detection unit for detecting a break-in attempt on a window or a door is used for the timely detection of whether a person is trying to gain access to a building to be protected in an unauthorized manner, for example by prying open or breaking open and / or destroying the window or the door To provide. The door mentioned can in particular be a window door (e.g. patio door or balcony door).

An intrusion detection unit of the type mentioned is, for example, from US Pat EP 2 163 713 A2 known. Furthermore, a monitoring device for monitoring a sash of a window lying in a frame is in the EP 2 312 544 A1 disclosed.

It is possible to equip windows or doors with such an intrusion detection unit ex factory, ie before they are installed in the building. In contrast, older windows or doors in particular often have no possibility of intrusion detection, so that this results in a weak point in the security of the property. There is therefore a desire, even unsecured Retrofitting windows or doors with an effective burglar detection unit in a simple and cost-effective manner. Known intrusion detection units for retrofitting are, however, limited in terms of their possibilities for condition detection or intrusion detection, and an external placement of the intrusion detection unit on the frame or the sash of the window or door is often not desirable for aesthetic reasons.

An object of the invention is to provide a retrofittable intrusion detection unit which has an expanded range of functions, is easy to install and also meets the aesthetic requirements.

The object is achieved by a retrofittable intrusion detection unit with the features of claim 1.

The retrofittable intrusion detection unit is provided for a window or a door which has a frame, a wing that can be pivoted with respect to the frame between a closed position and an open position, and a rebate air that extends between the frame and the wing. The air gap or space between the frame and the sash is usually understood to be the air gap. The clear width of the rebate air within the plane of extension of the window or door is typically at least 4 mm.

The retrofittable intrusion detection unit comprises a base module and at least one counter element assigned to the base module. The base module and the counter element are configured to be mounted in the rebate of the window or door on the frame on the one hand and on the wing on the other in a juxtaposition.

The basic module of the intrusion detection unit according to the invention comprises at least one wing position switch and a wing offset sensor. The leaf position switch is configured to generate a binary open switching signal or closed switching signal depending on the position of the leaf. The switching signal of the wing position switch therefore only takes one of two defined values. The wing offset sensor is used to generate a gradually varying wing position signal depending on the position of the wing. The wing position signal can thus assume a large number of different values and in particular also a plurality of intermediate values, ie the wing offset sensor supplies more than two defined values.

• zyklisch wiederholend einen aktuellen Wert des Flügelpositionssignals des Flügelversatzsensors zu ermitteln und in einer sogenannten Aufhebelversuch-Prüfung zu prüfen, ob der aktuelle Wert des Flügelpositionssignals oder ein hiervon abgeleiteter Wert einen Auslöse-Schwellenwert erreicht,
• in Abhängigkeit von einem positiven Ergebnis der Aufhebelversuch-Prüfung ein Aufhebelversuch-Meldesignal zu erzeugen, und
• das Aufhebelversuch-Meldesignal mittels der Kommunikationseinrichtung an die Alarmzentrale zu senden.

The retrofittable intrusion detection unit further comprises an evaluation and control device and a communication device for communication with an assigned alarm center of an intrusion detection system. The evaluation and control device is used to evaluate the switching signal of the wing position switch and the wing position signal of the wing offset sensor. For this purpose, the evaluation and control device is signal-coupled to the wing position switch and the wing offset sensor. The evaluation and control device checks, based on the switching signal of the wing position switch, in a so-called closed position test, whether the wing is in the closed position and, in the event of a positive result of the closed position test, carries out a monitoring operation. The evaluation and control device is configured for this in the monitoring mode:

• cyclically repeating to determine a current value of the wing position signal of the wing offset sensor and to check in a so-called lever test test whether the current value of the wing position signal or a value derived therefrom reaches a triggering threshold value,
• generate a signal for attempted lifting as a function of a positive result of the open attempt test, and
• to send the attempt to pry open signal to the alarm center using the communication device.

The invention is based on the general idea of increasing the security of an object to be protected, such as, for example, a house or an apartment, by equipping a hitherto unsecured window or an unsecured door of the object with a retrofittable intrusion detection unit. The intrusion detection unit serves to make a potential attempt to pry it open The burglar can recognize the window or door in good time, e.g. to trigger a deterrent alarm and / or to warn a resident of the house or apartment in good time about an impending unauthorized opening of the window or door or, in the worst case, immediately to the resident about an actual burglary to notify. For this purpose, the intrusion detection unit has a base module and a counter element assigned to the base module, which are or are mounted in the rebate air of the window or the door, the base module having a sash position switch and a sash offset sensor. An evaluation and control device of the intrusion detection unit and a communication device for communicating with an alarm center can advantageously also be components of the basic module; however, this is not absolutely necessary, as will be explained below.

The evaluation and control device is primarily used to detect with the help of the sash offset sensor when the window or door is closed, whether a sash of the window or the door with respect to a frame of the window or the door to a considerable extent, e.g. unusually wide or fast , is moved or moved back and forth uniformly, which suggests an attempt to pry it open. Such an attempt to pry open typically attempts to force the sash of the window or door, for example by means of a crowbar, within the plane of extension of the window or door (for example vertically upwards) in order to secure the mechanical securing devices of the window or door (for example locking bolts). to overcome and then open the wing. In the intrusion detection unit according to the invention, a pry open attempt is detected by means of the evaluation and control device based on a binary switching signal of the wing position switch by evaluating a gradually varying position signal of the wing offset sensor. As this not only detects the sash position, but also detects an attempt to pry it open can be, the intrusion detection unit has a wide range of functions despite its subsequent attachment to the window or door.

The binary switch signal of the leaf position switch represents an open or a closed position of the window or door leaf, or in other words whether the window or the door is open or closed, and is generated by the leaf position switch detecting whether the counter element is in its detection area is (closed position) or not (open position). The gradually varying sash position signal of the sash offset sensor, on the other hand, reflects a change in position of the sash relative to the frame, whereby it is detected to what extent a distance between the sash offset sensor and the counter element changes. As already mentioned, the distance between the sash offset sensor and the counter element can change significantly, in particular when trying to pry open, because the sash movement of the sashes with respect to the frame, for example, causes a particularly strong back and forth movement.

In the above-mentioned closed position test, the evaluation and control device queries a switching signal of the wing position sensor. Upon detection of a closed position of the sash, the evaluation and control device carries out the monitoring operation in which the evaluation and control device detects a current value of the sash position signal of the sash offset sensor cyclically repeating, ie at regular time intervals, and checks whether the current value of the sash position signal or a value derived therefrom reaches a trigger threshold. Reaching the trigger threshold basically means a positive result of the open attempt test and triggers an open attempt report signal. The pretend attempt signal is then sent by means of the communication device to the alarm center, which can generate and / or forward any type of alarm signal.

It goes without saying that the evaluation and control device can carry out suitable additional tests and filtering during the monitoring operation in order to avoid a false alarm. For example, provision can be made so that reaching the trigger threshold value only once or temporarily reaching the trigger threshold value within a predetermined time interval is not yet evaluated as an attempt to cancel out. Such a brief achievement of the trigger threshold value can be caused, for example, by a wind load suddenly acting on the window or the door or by an object crashing against the wing, such as a soccer ball. Furthermore, drift effects can be taken into account, for example, as will be explained below.

Basically, it is irrelevant whether the base module on the frame and the counter element on the wing of the window or the door, or conversely the base module on the wing and the counter element on the frame of the window or the door are in a juxtaposition. The base module and / or the counter element can be attached to the sash or frame by means of a joining means, for example by means of an adhesive or a screw. In other words, the components of the retrofittable burglar detection unit are placed on a respective surface of the frame or wing and thus do not form an integrated structural unit with the frame or wing.

Rather, a particular advantage of the intrusion detection unit according to the invention is that the base module and the (at least one) counter element are or can be mounted in the rebate air of the window or the door, so that despite the retrofitting, the intrusion selection unit with the window or door closed from the outside is not or essentially imperceptible. The advantageous accommodation in the rebate air is made possible by the fact that the described extensive range of functions a small number of simple switches and sensors can be accomplished. Since the intrusion detection unit is covered by the window frame, there is the advantage that the window or door has the same appearance even after retrofitting with the intrusion detection unit.

The window can be any type of window and the door can be a balcony door or a front door, for example. In particular, the sash of the window or the door can be pivotable with respect to the frame of the window or the door about a vertical pivot axis between the closed position and the open position. In addition, it is possible to tilt the sash with respect to the window frame about a tilt axis, in particular a horizontal axis or one that is perpendicular to the pivot axis.

Further advantageous embodiments of the invention can be found in the subclaims, the description and the drawings.

According to a first embodiment variant, the evaluation and control device is configured to compare the current value of the wing position signal with the triggering threshold value in the lever test, the current value of the wing position signal being compared directly with at least one predetermined triggering threshold value. Reaching the triggering threshold value is evaluated here as a criterion or as the only criterion for the existence of a pretend attempt in order to generate the pretend attempt signal. The trigger threshold does not have to be a constant value, but can be continuously adjusted and / or vary depending on other parameters.

The current value of the wing position signal can in particular be compared both with an upper threshold value and with a lower threshold value to take into account the fact that the sash can be moved in different directions relative to the frame during a prying operation, which can increase or decrease the distance between the sash offset sensor and the counter element. Here, the evaluation and control device checks in the lever test whether the current value of the wing position signal either exceeds the upper threshold value or falls below the lower threshold value. To a certain extent, a tolerance interval is defined by the upper and lower trigger threshold values, within which a current value of the wing position signal does not result in an attempt to release the signal.

However, it is also conceivable to use only one upper or lower threshold value for the lever test test instead of two threshold values (lower and upper threshold value).

In the course of time, a distance between the sash offset sensor and the counter element can change gradually, for example, by sash and frame expanding to different extents when exposed to sunlight or other heat. Furthermore, time-dependent and / or temperature-related drift effects can occur on the wing offset sensor. It is therefore advantageous if the evaluation and control device is configured to adapt the triggering threshold value on the basis of the current value of the wing position signal in the event of a negative result of the lever test attempt, as a result of which the triggering threshold value is continuously tracked, so to speak. This corresponds to a constant recalibration of the intrusion detection unit, provided that no attempt to lift it is detected in monitoring mode. This means that the environmental influences that are currently acting on the window or door can always be taken into account when trying to open the door.

The triggering threshold value can be adjusted in particular in that the evaluation and control device for the respective lever test test generates the triggering threshold value on the basis of a predetermined number of recently determined values of the wing position signal of the wing offset sensor. In this way, a gradual change in the wing position signal over several cycles of the monitoring operation, which is not caused by a pry-up attempt, can be taken into account. For example, the triggering threshold value can be adjusted by statistically averaging the predetermined number of most recently determined values of the wing position signal in order to detect a gradual change in the position of the wing relative to the frame and to adapt the triggering threshold accordingly.

In particular, it can also be provided that the currently determined value of the wing position signal or the predetermined number of most recently determined, in particular statistically averaged, values of the wing position signal form or form an average value for a subsequent cycle of the lever test, by means of which the aforementioned upper one and lower trigger threshold are defined.

In order to also be able to use the wing position signals determined in earlier cycles of the monitoring operation to adapt the triggering threshold value, these wing position signals can be stored in a memory connected to the evaluation and control device or directly in the evaluation and control device.

According to a second embodiment variant, the evaluation and control device is configured to, in the lever test, a difference between the current value of the wing position signal and one or more values of the previously determined (ie in earlier cycles of the monitoring operation) Determine wing position signal and compare the determined difference with the trigger threshold. In contrast to the first embodiment, the currently determined value of the wing position signal is not compared directly with the triggering threshold value, but rather a value from the current value of the wing position signal and one or more previously determined values value derived from the wing position signal. If the difference between the current value of the wing position signal and several previously determined values of the wing position signal is determined, these several previously determined values can, for example, be statistically averaged.

In the lever test test according to the second embodiment variant, it is checked or evaluated whether there is a significantly large difference between the currently determined value of the wing position signal and a previously determined, in particular a most recently determined, value of the wing position signal or a plurality of previously determined values of the wing position signal. The trigger threshold value, which thus corresponds to a maximum permissible difference, serves as a yardstick for the evaluation of whether there is a significantly large difference or not, whereby the previously determined value or the previously determined values of the wing position signal form / form a reference value. If a value of the difference between the currently determined value of the wing position signal and the previously determined value or the several previously determined values of the wing position signal, ie a difference value, is greater than the triggering threshold value, there is a significantly large difference. In this case (and optionally depending on other criteria), the open attempt test delivers a positive result, which results in the generation of the open attempt signal. If, on the other hand, the difference value is less than the triggering threshold value, ie the triggering threshold is not reached, the pretend attempt test is negative and no pretend attempt signal is generated.

The difference value can be a difference or the absolute amount of a difference between the current value of the wing position signal and the one or more previously determined values of the wing position signal.

If the difference between the current value and the previously determined value or the several previously determined values of the sash position signal merely represents a difference, the difference can assume a positive or negative value depending on the deflection strength and direction of deflection of the sash with respect to the frame. In the lever test test, the positive value of the difference (positive difference value) is then compared with a positive, upper trigger threshold value, and in a corresponding manner the negative value of the difference (negative difference value) with a negative, lower trigger threshold value. It is understood that there is no difference between the current value of the wing position signal and the previously determined value or the plurality of previously determined values of the wing position signal if the wing has not been displaced with respect to the window frame.

The previously determined value of the wing position signal can in particular be the value of the wing position signal determined in the last cycle of the lever test. In addition, the aforementioned plurality of previously determined values of the wing position signal can form a, in particular weighted, mean value. For example, when averaging, the last determined value of the wing position signal can be weighted more than the values of the wing position signal determined before the last determined value of the wing position signal, for example by double weighting the last determined value of the wing position signal relative to the penultimate and third-to-last value of the wing position signal.

So that a reference value is available for a future lever test attempt, it is advantageous if the evaluation and control device is configured to store the current value of the wing position signal in the event of a negative result of the lever test, so that the current value of the wing position signal is in one next cycle of the monitoring operation is available as a previously determined value of the wing position signal.

In all of the aforementioned embodiment variants, the evaluation and control device can further be configured to generate, based on the switching signal of the sash position switch, a sash position signal which represents the position of the sash of the window or the door, and the sash position signal can be generated by means of the communication device are sent to the alarm center assigned to the intrusion detection unit. In this way, a user can quickly and easily recognize the position of the sash of the window or the door by means of the alarm center, without having to be on the window or the door for this purpose. Due to the sash position signal, the alarm center can in particular issue a warning if the user wants to arm the corresponding intrusion detection system even though the window or door is not closed.

As already mentioned, the evaluation and control device and the communication device can be components of the base module and form a structural unit with the latter.

In the configuration and use of the burglar detection unit explained above, the base module and the associated counter-element are preferably arranged in a vertical section of the rebate air of the window or the door, in order to detect the offset movement typically occurring in the vertical direction during an attempt to pry open particularly effectively when the window or door is closed can.

According to the invention, in addition to the base module and the counter element assigned to the base module, the intrusion detection unit also has an expansion module and at least one additional counter element assigned to the expansion module, so that the intrusion detection unit has an expandable, modular structure. The expansion module and the additional counter element are configured to be mounted in the rebate of the window or door on the frame on the one hand and on the wing on the other in a juxtaposition. However, the expansion module and the base module are positioned or can be positioned apart from one another and in an orientation of at least approximately 90 ° relative to one another. This means that the expansion module and the base module are arranged in different sections of the rebate clearance, for example in a horizontal section on the one hand and a vertical section on the other hand. It goes without saying that, depending on the design of the window or door, the expansion module and the base module can also be at an angle deviating from a right angle, e.g. an acute angle, can be arranged to each other.

Like the base module, the expansion module according to the invention also has a further wing position switch which is configured to generate a further binary open switching signal or closed switching signal depending on the position of the further counter element. In this embodiment, the evaluation and control device is configured to check, based on the switching signal of the wing position switch of the base module and the further switching signal of the further wing position switch of the expansion module, whether the wing is in the closed position, the open position or a tilt position (so-called wing position test). . To detect the switching signal of the further wing position switch of the expansion module, the evaluation and control device can also signal the other wing position switch be coupled. The sash position signal generated from the switching signals of the respective sash position switches of the base module and the expansion module thus represents a closed, open or tilted position of the window sash or the door sash. Due to the expansion module, the tilt position of the sash can also be recorded as an additional condition.

• Im Falle, dass der Flügelstellungsschalter des Basismoduls ein Offen-Schaltsignal erzeugt und der weitere Flügelstellungsschalter des Erweiterungsmoduls ein Offen-Schaltsignal erzeugt, generiert die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Offenstellung des Flügels repräsentiert.
• Im Falle, dass der Flügelstellungsschalter des Basismoduls ein Offen-Schaltsignal erzeugt und der weitere Flügelstellungsschalter des Erweiterungsmoduls ein Geschlossen-Schaltsignal erzeugt, erzeugt die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Kippstellung des Flügels repräsentiert.
• Im Falle, dass zumindest der Flügelstellungsschalter des Basismoduls ein Geschlossen-Schaltsignal erzeugt, generiert die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Geschlossenstellung des Flügels repräsentiert.

If the base module is attached to a wing section or frame section, which is aligned at least approximately parallel to the, in particular vertically oriented, pivot axis of the wing, and the expansion module is attached to a wing section or frame section, which is at least approximately parallel to the, in particular horizontally oriented, tilt axis of the wing is aligned, the evaluation and control device can distinguish the following cases or wing positions:

• In the event that the wing position switch of the base module generates an open switch signal and the further wing position switch of the expansion module generates an open switch signal, the evaluation and control device generates a wing position signal which represents the open position of the wing.
• In the event that the wing position switch of the base module generates an open switching signal and the further wing position switch of the expansion module generates a closed switching signal, the evaluation and control device generates a wing position signal which represents the tilt position of the wing.
• In the event that at least the wing position switch of the base module generates a closed switching signal, the evaluation and control device generates a wing position signal which represents the closed position of the wing.

• Im Falle, dass der Flügelstellungsschalter des Basismoduls ein Offen-Schaltsignal erzeugt und der weitere Flügelstellungsschalter des Erweiterungsmoduls ein Offen-Schaltsignal erzeugt, generiert die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Offenstellung des Flügels repräsentiert.
• Im Falle, dass der Flügelstellungsschalter des Basismoduls ein Geschlossen-Schaltsignal erzeugt und der weitere Flügelstellungsschalter des Erweiterungsmoduls ein Offen-Schaltsignal erzeugt, generiert die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Kippstellung des Flügels repräsentiert.
• Im Falle, dass zumindest der weitere Flügelstellungsschalter des Erweiterungsmoduls ein Geschlossen-Schaltsignal erzeugt, generiert die Auswerte- und Steuereinrichtung ein Flügelstellung-Meldesignal, welches die Geschlossenstellung des Flügels repräsentiert.

In contrast, the base module is attached to a wing section or frame section, which is at least approximately parallel to that, in particular horizontally aligned, tilt axis of the wing, and if the expansion module is attached to a wing section or frame section, which is aligned at least approximately parallel to the, in particular vertically aligned, pivot axis of the wing, the evaluation and control device can perform the following cases or wing positions differentiate:

• In the event that the wing position switch of the base module generates an open switch signal and the further wing position switch of the expansion module generates an open switch signal, the evaluation and control device generates a wing position signal which represents the open position of the wing.
• In the event that the wing position switch of the base module generates a closed switching signal and the further wing position switch of the expansion module generates an open switching signal, the evaluation and control device generates a wing position signal which represents the tilt position of the wing.
• In the event that at least the further leaf position switch of the expansion module generates a closed switching signal, the evaluation and control device generates a leaf position signal which represents the closed position of the leaf.

For communication between the base module and the expansion module, the base module and the expansion module can, according to a particularly simple embodiment, be connected to one another only by means of a flexible electrical line. Alternatively, it is also possible for the base module and the expansion module to be connected to one another by means of a rigid support. In particular, the electrical line can be accommodated in a housing connecting the base module and the expansion module. Alternatively, the base module and the expansion module can each be accommodated in a housing section, or each form a housing section, the housing sections in the assembled state of the intrusion detection unit form a common housing for the electrical line. As an alternative to a physical connection, the base module and expansion module can also be connected wirelessly in terms of signal technology.

According to a particularly advantageous embodiment of a module system, the base module can be configured to be operated either with the expansion module or without the expansion module. As a result, the intrusion detection unit can be used particularly flexibly. In particular, it can be provided that the evaluation and control device automatically detects whether an expansion module is connected to the base module and, if applicable, operates the intrusion detection unit in the expanded functional scope of the base module and expansion module.

• zyklisch wiederholend einen aktuellen Wert des weiteren Flügelpositionssignals des weiteren Flügelversatzsensors zu ermitteln und in der Aufhebelversuch-Prüfung zu prüfen, ob der aktuelle Wert des weiteren Flügelpositionssignals oder ein hiervon abgeleiteter Wert einen weiteren Auslöse-Schwellenwert erreicht, und
• in Abhängigkeit von einem positiven Ergebnis dieser Prüfung das Aufhebelversuch-Meldesignal zu erzeugen.

The expansion module can have not only a wing position switch, but also a further wing offset sensor, which is configured to generate a further gradually varying wing position signal depending on the position of the further counter element. If the expansion module has the further sash offset sensor, the evaluation and control device can carry out the monitoring operation in the event that the test, ie the sash position check mentioned, shows that the sash assumes the tilt position. In this embodiment, the evaluation and control device is preferably configured to also:

• cyclically repetitively to determine a current value of the further wing position signal of the further wing offset sensor and to check in the lever test test whether the current value of the further wing position signal or a value derived therefrom reaches a further trigger threshold value, and
• depending on a positive result of this test, to generate the open attempt signal.

Such a configuration of the burglary detection unit enables a lever test to be carried out even if the sash is not only in the closed position but also in a tilted position, which enables extended burglary protection. The further trigger threshold value used in this configuration can be identical to the trigger threshold value explained in more detail above or can be parameterized differently.

If the intrusion detection unit has the expansion module mentioned, the evaluation and control device and the communication device can be components of either the base module or the expansion module in order to form a structural unit with the base module or with the expansion module. The components of the respective other module are then, as explained, signal-coupled to the evaluation and control device.

The wing position switch and / or the further wing position switch is preferably a magnetic switch, in particular a reed switch.

Alternatively or additionally, the wing offset sensor and / or the further wing offset sensor can each be a magnetic field sensor, in particular a Hall effect sensor.

The counter element is then preferably a permanent magnet.

It goes without saying that the wing position switch can also be a mechanically actuated switch, in particular a contact switch, which can be actuated by means of the counter element, for example in the form of a contact pin.

According to a particularly simple embodiment, both the magnetic switch and the magnetic field sensor of the base module can be assigned a common permanent magnet as a counter element.

Alternatively, the magnetic switch and the magnetic field sensor of the base module can be assigned two separate permanent magnets as counter elements, i.e. a separate permanent magnet is assigned to the magnetic switch and the magnetic field sensor of the base module. Such an embodiment is particularly well suited to using the magnetic field sensor and by corresponding evaluation of the wing position signal by means of the evaluation and control device to detect an external field influence, i.e. the attempt to manipulate the wing position switch and / or the wing offset sensor by means of an external magnetic field . If applicable, the evaluation and control device can generate a corresponding manipulation attempt signal and send it to the alarm center by means of the communication device.

In a corresponding manner, either a common permanent magnet or in each case a separate permanent magnet can be assigned to the further magnetic switch and the further magnetic field sensor as a counter element.

Basically, the wing position switch and / or the further wing position switch can also be optical switches, for example in that a light emitter (for example an LED or a LASER) emits light in the direction of the counter element, which is preferably a reflective material, but also the wing or The frame can be itself and on which the light is reflected back to a light receiving unit (for example a photodiode, a photocell or a photodetector). For example, the light receiving unit can be aligned with respect to the counter element such that no reflected light is received in an open position and / or a tilted position.

It is also conceivable to design the wing offset sensor in the form of an optical sensor. In order to detect a movement of the wing, in particular a lifting action, a light reflected by the counter element can strike a multi-unit photo detector. Depending on which section of the multi-section photodetector the light strikes, it can be concluded that the wing is deflected with respect to the frame. It is also conceivable that the multi-section photo detector can form both the wing position switch and the wing offset sensor. The multi-unit photodetector serves as a wing position switch in that it detects whether light is incident or not, and as a wing offset sensor if it is detected during light detection which section of the photodetector is struck by light.

The intrusion detection unit can furthermore have a glass break sensor which is connected or can be connected to the base module. If the intrusion detection unit also has an expansion module, the glass break sensor can also be connected or connectable to the expansion module.

A particularly flat design of the intrusion detection unit is advantageous so that the intrusion detection unit can be inserted particularly well into the rebate air between the window frame and sash and the intrusion detection unit can thus be integrated inconspicuously into the appearance of the window or door. Accordingly, it is advantageous if the base module and the counter element have a flat shape such that an overall height is less than 8 mm, preferably less than 6 mm and particularly preferably less than 4 mm. A correspondingly flat shape is understandably also suitable for the expansion module and the additional counter element.

Below the total height mentioned is the sum of the respective dimensions of the base module and counter element or of the expansion module and others

To understand the counter element in an extension direction, which is perpendicular to a mounting plane or to the underside of the base module or the extension module.

It proves to be particularly favorable if the communication device comprises a bidirectional radio interface. As a result, the communication device can not only send the attempt to lift signal to the alarm center, but also receive information signals from the alarm center. The intrusion detection unit can thus be controlled from the alarm center.

To supply the base module with electrical energy, the base module of the intrusion detection unit can have an energy store. If the intrusion detection unit also includes an expansion module, the energy store of the base module can also supply the expansion module with electrical energy. It goes without saying that the expansion module can also have its own energy store. The energy store is preferably designed in the form of an electrical battery. In order to achieve the flatest possible construction of the base and / or extension module, the electric battery can be a button cell. Basically, the base and / or expansion module can also be connected to an external power supply.

Fig. 1

ein schematisches Blockschaltbild einer erfindungsgemäßen Einbruchdetektionseinheit;

Fig. 2

die Einbruchdetektionseinheit gemäß einer ersten Ausführungsform;

Fig. 3

die Einbruchdetektionseinheit gemäß einer zweiten Ausführungsform;

Fig. 4

die Einbruchdetektionseinheit gemäß einer dritten Ausführungsform;

Fig. 5

die Einbruchdetektionseinheit gemäß einer vierten Ausführungsform;

Fig. 6

die Einbruchdetektionseinheit gemäß einer fünften Ausführungsform;

Fig. 7

die Einbruchdetektionseinheit gemäß einer sechsten Ausführungsform;

Fig. 8

die Einbruchdetektionseinheit gemäß einer siebten Ausführungsform;

Fig. 9

die Einbruchdetektionseinheit gemäß einer achten Ausführungsform;

Fig. 10

die Einbruchdetektionseinheit gemäß einer neunten Ausführungsform; und

Fig. 11

die Einbruchdetektionseinheit gemäß einer zehnten Ausführungsform.

In the following, the invention is described purely by way of example on the basis of possible embodiments with reference to the attached drawings. Show it:

Fig. 1

a schematic block diagram of an intrusion detection unit according to the invention;

Fig. 2

the intrusion detection unit according to a first embodiment;

Fig. 3

the intrusion detection unit according to a second embodiment;

Fig. 4

the intrusion detection unit according to a third embodiment;

Fig. 5

the intrusion detection unit according to a fourth embodiment;

Fig. 6

the intrusion detection unit according to a fifth embodiment;

Fig. 7

the intrusion detection unit according to a sixth embodiment;

Fig. 8

the intrusion detection unit according to a seventh embodiment;

Fig. 9

the intrusion detection unit according to an eighth embodiment;

Fig. 10

the intrusion detection unit according to a ninth embodiment; and

Fig. 11

the intrusion detection unit according to a tenth embodiment.

The figures show a retrofittable burglar detection unit for a window or a door. The window or door comprises a frame 10, one with respect to the frame 10 between a closed position and an open position about a pivot axis 12 not shown in the figures, and a sash 14 extending between the frame 10 and the sash 12. Furthermore, the window or the door can be at least approximately perpendicular be tilted to the pivot axis and also not shown in the figures. In the exemplary embodiments shown, the pivot axis is at least approximately vertical and the tilt axis is at least approximately horizontally oriented, although other orientations of the pivot axis and / or the tilt axis may also be possible. Furthermore, in the 2 to 11 For the sake of simplicity, the illustrated exemplary embodiments only show a lower right section of the window or the door, in which the intrusion detection unit is arranged purely by way of example. Nevertheless, the intrusion detection unit can also be attached at any other point in the rebate air of the window or the door.

The retrofittable intrusion detection unit comprises a base module 16 and at least one counter element 18 assigned to the base module 16 ( 2 to 11 ). The base module 16 and the counter element 18 are configured to be mounted in the rebate 14 of the window or door on the frame 10 on the one hand and on the wing 12 on the other hand in a juxtaposition. Specifically, the base module 16 in the in the 2 to 11 Exemplary embodiments shown attached to the frame 10 and the counter element 18 on the wing 12. It goes without saying that, conversely, the base module 16 can be attached to the wing 12 and the counter element 18 on the frame 10.

As with the 6 to 11 can be seen, the intrusion detection unit can optionally have an extension module 20 that can be coupled to the base module 16 in terms of signal technology, as a result of which the intrusion detection unit is expanded in a modular manner or is expandable. The base module 16 can be configured to be operated either with or without the expansion module 20.

A further counter element 22 is assigned to the expansion module 20. Like the base module 16 and the counter element 18, the expansion module 20 and the further counter element 22 are configured to be mounted in the rebate 14 of the window or door on the frame 10 on the one hand and on the sash 12 on the other hand in a juxtaposition.

A flexible electrical line 24 is provided for the signaling connection of the base module 16 to the expansion module 20. It goes without saying that the base module 16 and the expansion module 20 can also be connected to one another by means of a rigid support (not shown in the figures) in order to protect the electrical line 24 from damage or manipulation.

So that the base module 16 and / or the expansion module 20 and the counter-elements 18, 22 respectively assigned to them can be accommodated in the rebate clearance 14, they have a total height of at most 8 mm, preferably at most 6 mm and particularly preferably at most 4 mm. Since the retrofittable intrusion detection unit is accommodated in the rebate air 14, the intrusion detection unit in the closed position of the wing 12 is covered by a rollover section of the window frame 10 or of the wing 12, which is not shown in the figures, which means that an occupant of the house or apartment has no change Appearance of the window or door results.

In addition, the intrusion detection unit can also have a glass break sensor 26 ( Fig. 1 ), which is connected or connectable to the base module 16, for example by means of a radio interface or an electrical line, which is shown in Fig. 1 is shown by a dashed connecting line between the base module 16 and the glass break sensor 26. It is understood that the glass break sensor 26 can also be or can be connectable to the expansion module 20 if the intrusion detection unit has an expansion module 20.

Below is based on the in Fig. 1 shown block diagram of the structure of the individual components of the intrusion detection unit explained in more detail.

The base module 16 includes a leaf position switch 28a, which is configured to generate a binary open switching signal or closed switching signal depending on the position of the leaf 12. In particular, the sash position switch 28a detects a different position of the sash 12 along a direction that is perpendicular to the plane of extent of the frame 10 and sash 12 (opening direction of the sash 12 along a Z axis).

Furthermore, the base module 16 includes a wing offset sensor 30a, which is configured to generate a gradually varying wing position signal depending on the position of the wing 12. The wing offset sensor 30a detects in particular a different position of the wing 12 along a direction that runs along the plane of extent of the frame 10 and wing 12 (Y axis).

In the exemplary embodiments shown, the wing offset sensor 30a is a magnetic field sensor, specifically a Hall effect sensor, and the wing position switch 28a is a magnetic switch, specifically a reed switch. The counter element 18 ( 2 to 11 ) is a permanent magnet.

To evaluate the switching signal of the sash position switch 28a and the sash position signal of the sash offset sensor 30a, an evaluation and control device 32a and a communication device 34 are provided, which in the exemplary embodiment according to FIG Fig. 1 are integrated in the base module 16. The evaluation and control device 32a can be formed by a microcontroller. The communication device 34 is used for communication with an alarm center, not shown in the figures, and has a bidirectional radio interface 36, for example in the form of an antenna.

For the energy supply of the base module 16 of the intrusion detection unit, an energy store 38a is also provided, which is designed in the form of an electrical battery. In order to be able to ensure a flat construction of the intrusion detection unit, the electric battery or the energy store 38a is preferably a button cell.

Furthermore, the base module 16 comprises a manipulation detector 40a, which serves to detect manipulation of the base module 16 by an unauthorized person, such as a burglar. In order to connect the base module 16 to the expansion module 20 by means of the electrical line 24, both the base module 16 and the expansion module 20 each have a contact element 42a, 42b. The contact element 42a of the base module 16 can also be used to connect the base module 16 to the glass break sensor 26, which in turn also has a contact element 42c for this purpose. Furthermore, it is also conceivable that the glass break sensor 26 is connected to the expansion module 20. The glass break sensor 26 can be connected to the base module 16 or the expansion module 20 via a radio interface in order to ensure the greatest possible freedom of movement of the wing 12.

The expansion module 20 also has a further wing position switch 28b, which is configured to generate a further binary open switching signal or closed switching signal depending on the position of the further counter element 22. Optionally, the expansion module 20 can have a further wing offset sensor 30b ( 6 to 11 ) have what in Fig. 1 by dashed lines Lines is shown. The further wing offset sensor 30b is configured to generate a further, gradually varying wing position signal as a function of the position of the further counter element 22.

Like the base module 16, the expansion module 20 includes an evaluation and control device 32b, which is used to evaluate the switching signal of the wing position switch 28b and, if appropriate, the wing position signal of the wing offset sensor 30b. The expansion module 20 can also include a further manipulation detector 40b. Optionally, the expansion module 20 is also equipped with an energy store 38b, which in Fig. 1 is schematically represented by a dashed box.

Just like the wing position switch 28a of the base module 16, the wing position switch 28b of the expansion module 20 is a magnetic switch, specifically a reed switch, in the exemplary embodiments shown. In a corresponding manner, the optional further wing offset sensor 30b of the expansion module 20 is also a magnetic field sensor, specifically a Hall effect sensor. It is understood that the counter element 22 is also a permanent magnet.

Furthermore, in Fig. 1 the optional glass break sensor 26 is shown schematically by broken lines. The glass break sensor 26 can have its own evaluation and control device 32 c, which is used to evaluate the signal and / or the signals of a vibration detector 44 and / or a manipulation detector 40 c of the glass break sensor 26. The vibration detector 44 can be an acoustic sensor and / or a vibration sensor. In the case of a simpler type, the signal from the glass break sensor 26, in particular the vibration detector 44 and the manipulation detector 40c, can be evaluated by the evaluation and control device 32a of the base module 16 or by the evaluation and control device 32b of the expansion module 20.

According to an advantageously simple embodiment, the signals from the further wing position switch 28b, the further manipulation detector 40b and possibly the further wing offset sensor 30b of the extension module 20 can also be evaluated only by the evaluation and control device 32a of the base module 16, so that the extension module 20 does not have its own evaluation - Has to have and control device or at least only requires a simple signal processing (for forwarding the respective signal to the base module 16). As a result, only a single communication device 34 is required for communication with the alarm center. Conversely, it is also possible that only the expansion module 20 has an evaluation and control device 32b, which also evaluates the signals of the wing position switch 28a and the wing offset sensor 30a of the base module 16.

Below are based on 2 to 11 Various design and arrangement options of the intrusion detection unit in the rebate 14 described.

According to one in Fig. 2 In the illustrated first embodiment of the intrusion detection unit, the base module 16 is attached to a section of the frame 10 that runs at least approximately parallel to the pivot axis, with a separate counter element 18 being assigned to both the sash position switch 28a and the sash offset sensor 30a of the base module 16.

In a further development of the first embodiment, a common counter-element 18 can be assigned to both the sash position switch 28a and the sash offset sensor 30a, as shown in FIG Fig. 3 shown second embodiment of the intrusion detection unit can be seen.

In addition, it is also conceivable that the base module 16 according to an in 4 and 5 The third and fourth embodiments of the intrusion detection unit shown are not attached to a section of the frame 10 that is at least approximately parallel to the pivot axis of the wing 12, but to a section of the frame 10 that is at least approximately perpendicular to the pivot axis of the wing 12. The wing position switch 28a and the Wing offset sensor 30a of the base module 16 each has its own counter element 18 ( Fig. 4 ) or a common counter element 18 ( Fig. 5 ) must be assigned.

In Fig. 6 A fifth embodiment of the intrusion detection unit is shown, which differs from the first embodiment ( Fig. 2 ) differs in that the base module 16 is connected to an expansion module 20 by means of an electrical line 24. The expansion module 20 is attached to a section of the frame 10 which is aligned at least approximately parallel to the tilt axis of the wing 12. A counter element 22 attached to the wing 12 is assigned to the base module 20 or the wing position switch 28b of the base module 20. As with Fig. 6 As can be seen, the base module 16 and the expansion module 20 are positioned apart from one another and in an orientation of at least approximately 90 ° relative to one another.

According to a training of the in Fig. 6 Fifth embodiment of the intrusion detection unit illustrated can be according to a in Fig. 7 The sixth embodiment of the intrusion detection unit shown can also be assigned a common counter element 18 to the base module 16 or the wing position switch 28a and the wing offset sensor 30a.

In the Fig. 8 shown seventh embodiment differs from that in Fig. 6 fifth embodiment shown in that the positions of the base module 16 and the expansion module 20 on the frame 12 and the the counter-elements 18 assigned to the base module 16 and the counter-element 22 assigned to the expansion module 20 are interchanged on the wing 12. In other words, the base module 16 according to the seventh embodiment of the intrusion detection unit is attached to a section of the frame 10 oriented at least approximately perpendicular to the pivot axis of the wing 12 and the expansion module 20 is attached to a section of the frame 10 oriented at least approximately parallel to the pivot axis of the wing 12.

In a corresponding way, the differs in Fig. 9 shown eighth embodiment of the intrusion detection unit of the in Fig. 7 shown sixth embodiment of the intrusion detection unit.

In the 10 and 11 The ninth and tenth embodiments of the intrusion detection unit illustrated differ from those in FIG 6 and 7 Embodiments of the intrusion detection unit shown in that the expansion module 20 not only includes a wing position switch 28b, but also each a wing offset sensor 30b. In this case, the extension module 20 or the wing position switch 28b and the wing offset sensor 30b of the extension module 20 can each be assigned a separate counter element 22 ( Fig. 10 ), or a common counter element 22 can also be assigned ( Fig. 11 ). It is basically irrelevant whether the base module 16 is attached to a section of the frame 10 parallel to the pivot axis and the expansion module 20 to a section of the frame 10 parallel to the tilt axis, or vice versa, ie whether the base module 16 is attached to a section parallel to the tilt axis Section of the frame 10 and the expansion module 20 are attached to a section of the frame 10 parallel to the pivot axis.

Furthermore, it is also conceivable that in the 2 to 11 In the illustrated exemplary embodiments, the base module 16 and / or the expansion module 20 may or may not be attached to the frame 10, but rather to the wing 12.

• zyklisch wiederholend einen aktuellen Wert des Flügelpositionssignals des Flügelversatzsensors 30a zu ermitteln und in einer Aufhebelversuch-Prüfung zu prüfen, ob der aktuelle Wert des Flügelpositionssignals oder ein hiervon abgeleiteter Wert einen Auslöse-Schwellenwert erreicht,
• falls der Auslöse-Schwellenwert erreicht wird und - optional - falls wenigstens ein weiteres vorbestimmtes Kriterium erfüllt wird (z.B. mehrmaliges Erreichen des Auslöse-Schwellenwerts innerhalb einer vorbestimmten Anzahl von Zyklen des Überwachungsbetriebs), ein Aufhebelversuch-Meldesignal zu erzeugen, und
• das Aufhebelversuch-Meldesignal mittels der Kommunikationseinrichtung 34 an die Alarmzentrale zu senden.

In the following, the functioning of the intrusion detection unit is described using the in 2 to 5 illustrated basic configuration, in which the intrusion detection unit comprises only the base module 16. The evaluation and control device 32a of the base module 16 is configured to check, based on the switching signal of the sash position switch 28a, in a closed position test whether the sash 12 is in a closed position, ie whether the window or the door is closed. If the window or the door is closed, ie in the case of a positive result of the closed position test, the evaluation and control device 32a carries out a monitoring operation. Here, the evaluation and control device 32a is configured to

• cyclically repetitively to determine a current value of the wing position signal of the wing offset sensor 30a and to test in a lever test whether the current value of the wing position signal or a value derived therefrom reaches a triggering threshold value,
• if the tripping threshold is reached and - optionally - if at least one further predetermined criterion is met (e.g. reaching the tripping threshold several times within a predetermined number of cycles of the monitoring operation), generating a release attempt signal, and
• to send the attempt to pry open signal to the alarm center by means of the communication device 34.

The prying test can be done in two different ways. According to a first variant, the evaluation and control device 32a is configured to check the current value of the wing position signal in the lever test to compare with the trigger threshold. More specifically, the pry-up test tests determine whether, as a result of a pry-up attempt in which the counter element 18 is moved significantly with respect to the wing offset sensor 30a, it is determined whether a current value of the wing position signal reaches or exceeds the triggering threshold value. Since the distance between the counter element 18 and the wing offset sensor 30a changes significantly during a lifting operation, the current value of the wing position signal also changes. If the current value of the wing position signal exceeds an upper triggering threshold or if the current value of the wing position signal falls below a lower triggering threshold, this results in a positive result of the open attempt test. As a result, a pretend attempt signal is generated by the evaluation and control device 32a and sent to the alarm center by means of the communication device 34.

Since the wing position signal generated by the wing offset sensor 30a of the base module 16 may be subject to external influences, there is a possibility that the wing position signal changes gradually over time. In order to compensate for such drift effects, the evaluation and control device 32a can be configured to adapt the triggering threshold value on the basis of the current value of the wing position signal in the event of a negative result of the lever test attempt. In particular, the evaluation and control device 32a can be configured to generate the triggering threshold value for the respective open attempt test on the basis of a predetermined number of recently determined values of the wing position signal of the wing offset sensor 30a. This means that the system can be continuously recalibrated in undisturbed monitoring mode.

According to a second variant, the prying test can be carried out in that the evaluation and control device 32a differentiates between determined the current value of the wing position signal and one or more previously determined values of the wing position signal and compares this difference with the trigger threshold. The several previously determined values of the wing position signal can be statistically averaged values. In particular, the statistically averaged values of the previously determined values of the wing position signal can be weighted to different extents; For example, a last determined value of the wing position signal can be weighted more heavily than the values of the wing position signal which preceded the last determined value of the wing position signal.

In the lever test test according to the second variant, the evaluation and control device 32a determines whether there is an unauthorizedly large difference between the current value of the wing position signal and a previously determined value of the wing position signal, which can result from the fact that the wing 12 with respect to the Frame 10 has been moved significantly as a result of a prying process. The trigger threshold is the yardstick for whether there is a large difference between the current value of the wing position signal and the previously determined value of the wing position signal. If the difference between the current value of the wing position signal and the previously determined value of the wing position signal is greater than the triggering threshold value, then there is a criterion for an attempt to pry it open. Correspondingly, the evaluation and control device 32a can generate a pretend attempt signal which is sent to the alarm center by means of the communication device 34.

In the event of a negative result of the lever test test, the evaluation and control device 32a is configured to store the current value of the wing position signal so that the current value of the wing position signal is available in a next cycle of the monitoring operation as a previously determined value of the wing position signal (Recalibration). An additional memory, not shown in the figures, can be provided for this.

Regardless of the prying test, the evaluation and control device 32a can further be configured to generate, based on the switching signal of the sash position switch 28a, a sash position signal which represents the position of the sash 12 of the window or the door and the sash position detection signal to be sent to the alarm center by means of the communication device 34.

If the intrusion detection unit also has an expansion module 20 ( 6 to 11 ), not only a closed position or an open position of the wing 12 can be detected, but also a tilted position of the wing 12. The detection of a tilted position of the wing 12 takes place on the basis of a further switching signal of the further wing position switch 28b of the expansion module 20.

• zyklisch wiederholend den aktuellen Wert des weiteren Flügelpositionssignals des weiteren Flügelversatzsensors 30b zu ermitteln und in der Aufhebelversuch-Prüfung zu prüfen, ob der aktuelle Wert des weiteren Flügelpositionssignals oder ein hiervon abgeleiteter Wert einen weiteren Auslöse-Schwellenwert erreicht, und
• in Abhängigkeit von einem positiven Ergebnis dieser Prüfung das Aufhebelversuch-Meldesignal zu erzeugen.

The expansion module 20 also has a further wing offset sensor 30b ( 10 and 11 ), which, depending on the position of the further counter element 22, can generate a further, gradually varying wing position signal, the evaluation and control device 32a of the base module 16 can carry out the monitoring operation in the event that, according to the test carried out, the wing 12 assumes the tilt position. The evaluation and control device 32a of the base module 16 is configured for this purpose in the monitoring mode

• to determine the current value of the further wing position signal of the further wing offset sensor 30b in a cyclically repeating manner and to check in the lever test test whether the current value of the further wing position signal or a value derived therefrom reaches a further trigger threshold value, and
• depending on a positive result of this test, to generate the open attempt signal.

The evaluation and control device 32a of the base module 16 can be configured differently, depending on which section of the window frame 10 or the wing 12, the base module 16 and the expansion module 20 are attached, in order to generate a wing position signaling signal according to a predetermined logic combination. This can then be transmitted to the alarm center by means of the communication device 34.

Reference symbol list

10th

Frame

12

wing

14

Air clearance

16

Base module

18th

Counter element

20th

Expansion module

22

another counter element

24th

electrical line

26

Glass break sensor

28a, 28b

Wing position switch

30a, 30b

Wing offset sensor

32a, 32b, 32c

Evaluation and control device

34

Communication facility

36

Radio interface

38a, 38b

Energy storage

40a, 40b, 40c

Manipulation detector

42a, 42b, 42c

Contact element

44

Vibration detector

Claims (14)

1. A retrofittable intrusion detection unit for a window or for a door, which window or door has a frame (10), a leaf (12) pivotable with respect to the frame (10) between a closed position and an open position, and a rebate gap (14) extending between the frame (10) and the leaf (12),
   said retrofittable intrusion detection unit comprising a base module (16); and at least one counter-element (18) associated with the base module (16), with the base module (16) and the counter-element (18) being configured to be installed in the rebate gap (14) of the window or of the door at the frame (10), on the one hand, and at the leaf (12), on the other hand, in an opposite position with respect to one another,
   wherein the base module (16) comprises:

   - a leaf position switch (28a) which is configured to generate a binary open switching signal or closed switching signal in dependence on the position of the leaf (12); and

   - a leaf offset sensor (30a) which is configured to generate a gradually varying leaf position signal in dependence on the position of the leaf (12);

   wherein the intrusion detection unit further comprises:

   - an evaluation and control device (32a) for evaluating the switching signal of the leaf position switch (28a) and the leaf position signal of the leaf offset sensor (30a); and

   - a communication device (34) for communicating with an alarm center;

   wherein the evaluation and control device (32a) is configured to check, based on the switching signal of the leaf position switch (28a) in a closed position check, whether the leaf (12) adopts the closed position and to perform a monitoring operation in the event of a positive result of the closed position check; and
   wherein the evaluation and control device (32a) is configured, in the monitoring mode,

   - to determine a current value of the leaf position signal of the leaf offset sensor (30a) in a cyclically repeating manner and to check in a prying-open attempt check whether the current value of the leaf position signal or a value derived therefrom reaches a trigger threshold value;

   - to generate a prying-open attempt status signal in dependence on a positive result of the prying-open attempt check; and

   - to transmit the prying-open attempt status signal to the alarm center by means of the communication device (34);

   wherein the intrusion detection unit further has an extension module (20) and at least one further counter-element (22) associated with the extension module (20), with the extension module (20) and the further counter-element (22) being configured to be installed in the rebate gap (14) of the window or of the door at the frame (10), on the one hand, and at the leaf (12), on the other hand, in an opposite position with respect to one another; wherein the base module (16) and the extension module (20) are positioned or can be positioned remote from one another and in an orientation of 90° relative to one another;
   wherein the extension module (20) has a further leaf position switch (28b) which is configured to generate a further binary open switching signal or closed switching signal in dependence on the position of the further counter-element (22); and
   wherein the evaluation and control device (32a) is configured to check, based on the switching signal of the leaf position switch (28a) of the base module (16) and on the further switching signal of the further leaf position switch (28b) of the extension module (20), whether the leaf (12) adopts the closed position, the open position or a tilt position.
2. An intrusion detection unit in accordance with claim 1,

   characterized in that

   the evaluation and control device (32a) is configured to compare, in the prying-open attempt check, the current value of the leaf position signal with the trigger threshold value.
3. An intrusion detection unit in accordance with claim 2,

   characterized in that

   the evaluation and control device (32a) is configured to adjust the trigger threshold value on the basis of the current value of the leaf position signal in the event of a negative result of the prying-open attempt check.
4. An intrusion detection unit in accordance with claim 2 or claim 3,

   characterized in that

   the evaluation and control device (32a) is configured to generate the trigger threshold value for the respective prying-open attempt check on the basis of a predetermined number of last determined values of the leaf position signal of the leaf offset sensor (30a).
5. An intrusion detection unit in accordance with claim 1,

   characterized in that

   the evaluation and control device (32a) is configured to determine, in the prying-open attempt check, a difference between the current value of the leaf position signal and one or more previously determined values of the leaf position signal and to compare the difference with the trigger threshold value.
6. An intrusion detection unit in accordance with at least one of the claims 2 to 5,

   characterized in that

   the evaluation and control device (32a) is configured to save the current value of the leaf position signal in the event of a negative result of the prying-open attempt check so that the current value of the leaf position signal is available in a next cycle of the monitoring operation as a previously determined value of the leaf position signal.
7. An intrusion detection unit in accordance with at least one of the preceding claims,

   characterized in that

   the evaluation and control device (32a) is further configured to generate, based on the switching signal of the leaf position switch (28a), a leaf position status signal which represents the position of the leaf (12) of the window or of the door and to transmit the leaf position status signal to the alarm center by means of the communication device (34).
8. An intrusion detection unit in accordance with at least one of the preceding claims,

   characterized in that

   the evaluation and control device (32a) and the communication device (34) are components of the base module (16).
9. An intrusion detection unit in accordance with at least one of the preceding claims,

   characterized in that

   the evaluation and control device (32a) is configured

   - to generate a leaf position status signal which represents the open position of the leaf in the event that the leaf position switch (28a) of the base module (16) generates an open switching signal and the further leaf position switch (28b) of the extension module (20) generates an open switching signal;

   - to generate a leaf position status signal which represents the tilt position of the leaf (12) in the event that the leaf position switch (28a) of the base module (16) generates an open switching signal and the further leaf position switch (28b) of the extension module (20) generates a closed switching signal; and

   - to generate a leaf position status signal which represents the closed position of the leaf (12) in the event that at least the leaf position switch (28a) of the base module (16) generates a closed switching signal.
10. An intrusion detection unit in accordance with at least one of the claims 1 to 8,

    characterized in that

    the evaluation and control device (32a) is configured

    - to generate a leaf position status signal which represents the open position of the leaf (12) in the event that the leaf position switch (28a) of the base module (16) generates an open switching signal and the further leaf position switch (28b) of the extension module (20) generates an open switching signal;

    - to generate a leaf position status signal which represents the tilt position of the leaf (12) in the event that the leaf position switch (28a) of the base module (16) generates a closed switching signal and the further leaf position switch (28b) of the extension module (20) generates an open switching signal; and

    - to generate a leaf position status signal which represents the closed position of the leaf (12) in the event that at least the further leaf position switch (28b) of the extension module (20) generates a closed switching signal.
11. An intrusion detection unit in accordance with at least one of the preceding claims,

    characterized in that

    the base module (16) and the extension module (20) are only connected to one another by means of a flexible electrical line (24), or

    wherein the base module (16) and the extension module (20) are connected to one another by means of a rigid support; and/or

    in that the base module (16) is configured to be selectively operated with or without the extension module (20); and/or

    in that the evaluation and control device (32a) and the communication device (34) are components of the base module (16) or of the extension module (20).
12. An intrusion detection unit in accordance with at least one of the preceding claims,

    characterized in that

    the extension module (20) comprises a further leaf offset sensor (30b) which is configured to generate a further gradually varying leaf position signal in dependence on the position of the further counter-element (22); in that the evaluation and control device (32a) is configured to perform the monitoring operation in the event that the check reveals that the leaf (12) adopts the tilt position; and

    wherein the evaluation and control device (32a) is configured, in the monitoring mode,

    - to determine a current value of the further leaf position signal of the further leaf offset sensor (30b) in a cyclically repeating manner and to check in the prying-open attempt check whether the current value of the further leaf position signal or a value derived therefrom reaches a further trigger threshold value; and

    - to generate the prying-open attempt status signal in dependence on a positive result of this check.
13. An intrusion detection unit in accordance with at least one of the preceding claims,

    characterized in that

    the leaf position switch (28a, 28b) is a magnetic switch, in particular a reed switch; and/or

    in that the leaf offset sensor (30a, 30b) is a magnetic field sensor, in particular a Hall effect sensor; and/or

    in that the counter-element (18, 22) is a permanent magnet,

    in particular wherein

    a common permanent magnet is associated as a counter-element (18) with the magnetic switch and with the magnetic field sensor of the base module (16); or

    two separate permanent magnets are associated as counter-elements (18) with the magnetic switch and with the magnetic field sensor of the base module (16).
14. An intrusion detection unit in accordance with at least one of the preceding claims,

    characterized in that

    the intrusion detection unit furthermore has a glass breakage sensor (26) which is connected or connectable to the base module (16); and/or

    in that the base module (16) and the counter-element (18) have a flat shape having a total height of at most 8 mm, preferably of at most 6 mm, and particularly preferably of at most 4 mm; and/or

    in that the communication device (34) has a bidirectional radio interface.

Images