DE102017110279A1 - Apparatus and method for detecting and signaling a status of a window or door - Google Patents

Abstract

A device (1) for detecting and signaling a state of a window or a door, comprises at least one first sensor unit (3) for detecting an opening state. The device (1) has at least one second sensor unit (7) for detecting a further state of the window or the door, this state having vibrations which are brought about by the action of force, and wherein a logic unit (14) is provided, to combine the further state before signaling with the opening state. The invention further relates to a method for detecting and signaling a state of a window or a door.

Description

The invention relates to an apparatus and a method for detecting and signaling a state of a window or a door.

Such a device is commonly used e.g. used in or on windows or doors to determine whether the respective component is closed, opened or in an intermediate state, e.g. is tilted. The device is coupled to an alarm system or the like.

The document EP 1 918 890 B1 indicates such a device.

In the course of increasingly frequent violent burglaries and externally related violence, such. Weather effects, accidents and the like., There is a need for improved and extended devices of this kind, which not only signal an open state, but are also able to detect a done violence to a window or a door.

Known are so-called glass-breakage sensors, which are glued to a pane of a window or a door and have a sensitive to structure-borne sound sensor. Glass breakage can be detected by characteristic glass breakage vibrations that are in the range of about 100 kHz (kilohertz). In this way, although an actual glass breakage is reliably detected, an (unsuccessful) break-in attempt goes unnoticed.

The object of the present invention is therefore to provide an improved device for detecting and signaling a state of a window or a door. It is a further object to provide a method that allows reliable detection of intrusion-induced trauma to a window or door.

The object is achieved by a device or a method having the features of the respective independent claim.

A device according to the invention for detecting and signaling a state of a window or a door has at least one first sensor unit for detecting an opening state of a window / door. The device is provided or connected to at least one second sensor unit for detecting a further state of the window or the door, this state having vibrations brought about by the action of force. A logic unit is provided to combine the further state before signaling with the open state.

A basic idea of the invention is thus to evaluate vibrations or vibrations which point to the effects of violence not on their own but in consideration of the opening state.

A method according to the invention has the following steps for this purpose: An opening state of the window or the door is detected by means of a first sensor unit, and a force effect is detected on the basis of an evaluation of signals of a second sensor unit. The detected violence is then signaled depending on the detected opening condition of the window or door.

In an advantageous embodiment of the method, the opening state, at least the states "open" and "closed" occupy, with a detected violence is only signaled when the opening state of the window or door is not or only briefly "closed".

In a further development of the method, the opening state may additionally assume the state of being "tilted", whereby a detected force influence in the state "tilted" is signaled only if the opening state of the window or the door does not change within a predetermined period of time after the detection of the force in the state "closed" changes. The predetermined period can be e.g. for a few seconds.

By including the open state in the evaluation of the signal of the second sensor unit detecting vibrations and vibrations, the likelihood of triggering a false alarm is reduced. Advantageously, the triggering threshold can be reduced compared with, for example, a known glass-breakage sensor. Known sensors trigger only when an actual glass breakage, because any other threshold would too often lead to false alarms, for example, in a wind-induced slamming. Disadvantage is thereby burglary attempts, such. an unsuccessful impact on the disc, not recognized in devices and methods according to the prior art. In the method and apparatus according to the invention, as a result of a more sensitive setting or consideration of frequencies other than those which occur in the event of glass breakage, burglary attempts can also be detected without the risk of false alarms increasing.

In an advantageous embodiment of the device, the first sensor unit has an actuator for sensing the opening state and a potentiometer coupled thereto as the first sensor. This arrangement represents a reliable working and positioned in the rebate of the window and / or door sensor unit for detecting the opening state of the window or the door. In addition, structurally simple not only the states "open" and "closed", but also the state " be differentiated. Alternatively, however, based on a different principle of operation sensors can be used to detect the opening state of the window or door, such as a reed contact, which is actuated depending on the opening state of an associated magnet.

In one embodiment, the at least one second sensor unit has at least one second sensor, which is a vibration sensor. Vibration sensors are available in a large selection and high quality at low cost and require only a small installation space.

A further embodiment provides for this that the at least one second sensor is designed as a vibration sensor with at least one piezoceramic bimorph element. Alternatively, the at least one second sensor can also be designed as an acceleration sensor, in particular in MEMS (Micro Electro-Mechanical System) technology.

In a further embodiment, the second sensor is arranged together with the first sensor in a housing of the device. This offers the advantage of a compact design with minimal cabling. However, it is alternatively possible to arrange the first sensor together with a control device, which also includes the logic unit, in a housing (eg in the rebate space or on a frame of the window or the door) and the second sensor externally from this housing, for example according to Art a known glass breakage sensor on a window or door pane and connect via a cable to the control device.

If the at least one second sensor has at least one preferred direction of action, it can be arranged correspondingly in the device, whereby the preferred operating direction has the advantage that a signal amplitude of a signal detected in this direction of action is particularly high. Thus, an original mounting location of the device can still be used, wherein the sensor element must be aligned with its effective direction in the direction in which a probability of violence is greatest. Relevant empirical values can be used for this purpose.

In yet another embodiment, the device has a control device with an adaptation unit for the at least one second sensor unit, two evaluation units for a respective sensor unit and a transmission unit. This makes a compact design possible.

In another embodiment, the matching unit has at least one filter circuit which is used for selective filtering of an output signal of the second sensor. This gives the advantage of a special signal selection to reduce false alarms.

For this purpose, the evaluation unit for the second sensor unit can be designed at least for an evaluation of the time length and amplitude of the signals of the second sensor unit. This increases selectivity and precision. If e.g. In the case of a hammer, a glass pane is destroyed only at the second or third time, and by evaluating the signals generated thereby over a certain period of time, the frequency of its occurrence can be detected and thus reduced by e.g. different periodic noises or signals. This also applies to other tools with which frames or other components are to be broken.

In yet another embodiment, the evaluation unit for the second sensor unit can be designed to analyze signal characteristics of the signals of the second sensor unit, wherein a comparison with previously stored waveforms is performed. This makes a particularly advantageous evaluation with significant reduction of false alarms possible. An adaptation to different environmental and installation conditions can thus be easily realized.

In another embodiment, an additional evaluation unit may be provided, which is assigned to the first sensor unit and examines the Ausganssignale to vibrations. In this way, a plausibility of the detected signals can be made possible.

A particularly advantageous space-saving construction results when the at least one first sensor unit and the at least one second sensor unit are arranged in a housing. The housing may e.g. be made of a weatherproof plastic, with a suitable protection against ingress of moisture and dust can be reduced to a minimum in a simple manner.

• 1 eine schematische Darstellung einer erfindungsgemäßen Vorrichtung mit einem teilweise geöffneten Gehäuse;
• 2 ein schematisches Blockschaltbild eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung nach 1; und
• 3 ein schematisches Blockschaltbild einer Variante des Ausführungsbeispiels nach 2.

Reference to the accompanying drawings, the invention is explained in detail. Show it:

• 1 a schematic representation of a device according to the invention with a partially open housing;
• 2 a schematic block diagram of an embodiment of the inventive device according to 1 ; and
• 3 a schematic block diagram of a variant of the embodiment according to 2 ,

Identical components or functional units with the same function are identified by the same reference numerals in the figures.

coordinates x . y and z serve for better orientation.

1 shows a schematic representation of a device according to the invention with a partially open housing.

The device 1 for detecting a state of a window or a door has a first sensor unit 3 and a second sensor unit 7 in a common housing 2 on.

The device 1 is intended for installation in a window or door. This is done on the document EP 1 918 890 B1 directed.

The housing 2 is made in this embodiment of a weatherproof plastic and has a substantially cuboid shape. It extends in a longitudinal direction here in the direction of the y-coordinate and in a width direction in the direction of the x-coordinate, with a height in the z-direction.

The first sensor unit 3 is here in an upper quarter of the case 2 arranged and has a first sensor 4 on. The sensor 4 is designed as a potentiometer. The potentiometer works with an actuator 5 together, which in a direction of action 5a is displaceable in the x direction. The first sensor unit 3 is used to detect the following states of a window or door, namely "open", "tilted", "closed". A detailed description is the document EP 1 918 890 B1 refer to. This document is hereby incorporated by reference in this disclosure. The first sensor unit 3 is therefore not further described below, only if it is necessary in context.

It should be noted that a method according to the invention can also be implemented with another sensor technology for detecting the opening state of the window or the door than the detection by way of example shown here by means of the actuator 5 and the potentiometer as a sensor 4 , Accordingly, a device according to the invention may also have a different type of sensor for detecting the opening state of the window or door, for example, at least one reed contact, which is actuated by an associated magnet depending on the opening state.

In a middle longitudinal section of the housing 2 is a carrier unit 6 with the second sensor unit 7 and a control device 10 arranged.

The carrier unit 6 Here is a printed circuit board, for example in multilayer design with corresponding SMD components, to claim the least space.

The second sensor unit 7 has at least one second sensor 8th on, which is arranged here aligned in the x direction. The second sensor 8th is used to detect a further state of the window or door, in which vibrations are generated. These vibrations can be both mechanical and acoustic. Such a condition is caused, for example, by an act of violence and associated with a process of damage, destruction or breakage of components of the window or door. This may include, for example, smashing and bursting of glass (windows), breaking and / or shattering of wood and / or plastic components, breaking, bending or cracking noises of metal components, pops of tools such as crowbar, hammer, chisel, screwdriver in connection with other components occur.

The use of force can be conscious, e.g. as burglary or property damage, but also circumstantial, e.g. by weather or accident and the like. respectively.

Mechanical and acoustic vibrations, eg due to effects such as rain, storm, hail, thunderstorms and the like. as well as bird strike are conditional and of the second sensor unit 7 can be detected in an evaluation of the second sensor unit 7 thereby generated signals are excluded. It is also possible that the second sensor 8th is designed for a specific frequency range of noise in case of violence so that just such vibrations can be detected very secure.

The second sensor 8th is a vibration / vibration sensor, for example with a piezoceramic bimorph element. Such a transmitter converts mechanical and / or acoustic Vibration energy into electrical energy. The arrangement of the second sensor 8th can be done so that in particular structure-borne noise and possibly also airborne sound is recorded. Alternatively, an acceleration sensor, for example in MEMS technology, can be used to detect the vibrations or oscillations.

In the illustrated example, the vibration / vibration sensor is the second sensor 8th together with the first sensor 4 for detecting the opening state together in the housing 2 arranged. This offers the advantage of a compact design with minimal cabling. Because the case 2 for arrangement on a frame, possibly in the rebate of the window (the door) is provided, a force acting on the disc, such as a hammer blow, indirectly detected.

It is alternatively possible, the second sensor 8th externally from the common housing 2 for example, to arrange on the type of a known glass breakage sensor on a window or door pane and a cable with the control device 10 connect to.

A drive circuit including the necessary electrical power supply is in the vicinity of the second sensor 8th arranged. Furthermore, there is the control device 10 here on the carrier unit. The control device 10 will be even closer in connection with the below 2 and 3 explained. In this context, the inventive method is explained in detail.

In the lower section of the housing 2 in 1 is an energy supply 9 arranged. This can eg suitable button cells with corresponding performance for the first sensor unit 3 and the second sensor unit 4 be.

In 2 is a schematic block diagram of an embodiment of the device according to the invention 1 to 1 shown.

The control device 10 includes an adjustment unit 11 , two evaluation units 12 . 13 and a transmitting unit 15 with an antenna 16 ,

The first sensor unit 3 with the first sensor 4 is with the evaluation unit 13 connected, which in turn to the transmitting unit 15 connected. This is in the document EP 1 918 890 B1 including the operation described in detail. Via this connection path from the first sensor 4 to the transmitting unit 15 the opening state of the window or the door is detected and output. In this case, at least the states "open" and "closed" and preferably additionally the state "tilted" recognized and output.

The second sensor unit 7 with the second sensor 8th is to the adjustment unit 11 connected. The adaptation unit 11 may include, for example, filter circuits for selectively filtering an output signal of the second sensor 8th serve. In addition, an amplifier circuit for the unfiltered and filtered signal is provided. The filter circuit (s) may also be adjustable to accommodate different window and door materials (glass / metal / wood, etc.).

The adaptation unit 11 also has an electrical power supply for the second sensor 8th on. This is necessary eg for sensor elements for which a higher operating voltage than the supply voltage of the power supply is necessary.

The evaluation unit 12 performs an evaluation of that of the fitting unit 11 amplified and filtered signals. In this case, a time length and amplitude can be evaluated with. Waveforms may also be analyzed, which are compared to previously stored waveforms corresponding to certain characteristic noises of force application.

A bird strike is e.g. short in time, but has only a moderate amplitude in the waveform. In contrast, a hammer blow to smash a disc is also short in time, but the detected signal has a much higher amplitude and can have different frequencies and frequency responses to a bird strike.

Of course, other signal characteristics and other distinguishing features can also be included in the evaluation. So can the evaluation unit 12 also have a device for plausibility of signals.

If the evaluation unit 12 has determined after evaluation that a state of the window or door corresponds to a force application, generates the evaluation unit 12 a corresponding signal to a logic unit 14 forwards. The logic unit 14 is also the one of the evaluation unit 13 determined opening state of the window or the door supplied.

According to the invention by the evaluation 12 recognized force action not unconditionally to the transmitting unit 15 transmitted and thus signaled by the device, but conditionally taking into account the opening state the window or the door. The following logic is used:

When the window (or door) is open, or only temporarily and simultaneously with the action of violence, a recognized force is not output. Rather, it is believed that such a violent action is not intrusion-related, but was caused, for example, by a gust of wind.

When the window (or door) is tilted, a recognized force action is output only if the opening state of the window or the door does not change within a period of time after detection of the action of force, in particular does not change to the state "closed". If the opening state changes to the "closed" state, it can be assumed that a wind gust is the cause here as well.

Both logic relationships reduce the likelihood that a false alarm will be triggered. Advantageously, thereby the sensitivity in the evaluation 12 be increased compared to, for example, a known glass breakage sensor. Known sensors trigger only at an actual glass breakage, as any other threshold would too often lead to false alarms, for example, the described wind-induced slamming. Disadvantage of burglary attempts, such as an unsuccessful impact on the disc are not recognized. In the method and apparatus according to the invention, as a result of a more sensitive setting or consideration of frequencies other than those which occur in the event of glass breakage, burglary attempts can also be detected without the risk of false alarms increasing.

The transmitting unit 15 then sends that from the evaluation unit 13 or from the logic unit 14 received signal to a receiver, such as a monitoring station, which then initiates predetermined steps, such as alerting appropriate places.

3 shows a schematic block diagram of a variant of the embodiment according to 2 ,

Unlike the execution after 2 is an additional evaluation unit in this variant 17 provided, which parallel to the already existing evaluation unit 13 between the first sensor unit 3 and the transmitting unit 14 connected.

The additional evaluation unit 17 evaluates the output signal of the first sensor 4 in addition to having irregularities or artefacts in the amplitude superimposed on the usually output DC signal. These artifacts can come from a violence. In this way, the additional evaluation unit 17 in a different way than the evaluation unit 12 also record and evaluate vibrations. These can also be in the logic unit 14 be taken into account, for example, for plausibility of the second sensor unit 7 detected signals are used.

If z .B. in a tilted state of the window passing through the first sensor unit 3 is detected, a force application, this is done by the second sensor unit 7 detected. Thus, detection of multiple states of the window or the door is possible simultaneously.

The adaptation unit 11 and the evaluation units 12 . 13 . 17 and the logic unit 14 may be discrete or at least partially by a program of a microprocessor or microcomputer of the control device 10 be realized.

The invention is not limited to the embodiments described above, but may be modified within the scope of the claims.

It may be possible that a preferred orientation of the second sensor 8th is due in a certain direction due to a structure of the sensor device. For detecting all directions, for example, a plurality of sensor components of the second sensor unit 7 be assigned, of which, for example, each one in the x-direction, one in the y-direction and one in the z-direction with the respective most sensitive effective direction is arranged.

For example, it is conceivable that the evaluation unit 13 and the additional evaluation unit 17 are summarized.

When the method of the invention of the 1 It is noted that a combination in alternative embodiments of the method can also be carried out separately from the evaluation of the sensor signals. For example, the information of the first and second sensor unit after an evaluation by the respective evaluation units 12 . 13 also be transmitted separately to an (alarm) center, within which then the corresponding linkage of the information takes place, so that a detected violence impact is signaled only depending on the detected opening state of the window or the door.

LIST OF REFERENCE NUMBERS

1

contraption

2

casing

3

First sensor unit

4

First sensor

5

actuator

5a

effective direction

6

support unit

7

Second sensor unit

8th

Second sensor

9

power supply

10

control device

11

matching unit

12, 13, 17

evaluation unit

14

logic unit

15

transmission unit

16

antenna

x, y, z

coordinates

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1918890 B1 [0003, 0030, 0032, 0046]

Claims (20)

Device (1) for detecting and signaling a state of a window or door, comprising at least one first sensor unit (3) with a first sensor (4) for detecting an opening state of a window / door, characterized in that the device (1 ) is provided or connected to at least one second sensor unit (7) for detecting a further state of the window or the door, this further state having vibrations caused by violence, and a logic unit (14) being provided, to combine the further state before signaling with the opening state. Device (1) according to Claim 1 in which the at least one second sensor unit (7) has at least one second sensor (8), which is a vibration sensor. Device (1) according to Claim 2 in which the at least one second sensor (8) is designed as a vibration sensor with at least one piezoceramic bimorph element. Device (1) according to Claim 1 in which the at least one second sensor unit (7) has at least one second sensor (8), which is an acceleration sensor. Device (1) according to one of Claims 2 to 4 in which the at least one second sensor (8) has at least one preferred effective direction. Device (1) according to one of the preceding claims, in which the device (1) has a control unit (10) with an adaptation unit (11) for the at least one second sensor unit (7), two evaluation units (13, 12) for one sensor unit each ( 3, 7) and an output unit, in particular a transmitting unit (15). Device (1) according to Claim 6 in which the matching unit (11) has at least one filter circuit which serves for the selective filtering of an output signal of the second sensor (8). Device (1) according to Claim 6 or 7 in which the evaluation unit (12) for the second sensor unit (7) is designed at least for an evaluation of the time length and amplitude of the signals of the second sensor unit (7). Device (1) according to Claim 8 in which the evaluation unit (12) for the second sensor unit (7) is designed to analyze signal characteristics of the signals of the second sensor unit (7), wherein a comparison with previously stored waveforms is performed. Device (1) according to one of the preceding claims, in which an additional evaluation unit (17) is provided which is associated with the first sensor unit (3) and examines their output signals for vibrations. Device (1) according to one of the preceding claims, in which the at least one first sensor unit (3) and the at least one second sensor unit (7) are arranged in a common housing (2). Device (1) according to one of the preceding claims, in which the logic unit (14) and at least one of the two sensor units (3, 7) are arranged in a common housing (2). Device (1) according to one of the preceding claims, in which the opening state comprises at least one closed and one opened state of the window or the door. Device (1) according to Claim 13 in that the opening state additionally comprises a tilted state of the window or the door. Device (1) according to one of the preceding claims, in which the first sensor unit (3) comprises an actuator (5) for sensing the opening state and a potentiometer coupled thereto as the first sensor (4). Method for detecting and signaling a state of a window or a door, comprising the following steps: - Detecting an opening state of the window or the door by means of a first sensor unit (3); Detecting a force effect on the basis of an evaluation of signals of a second sensor unit (7); and Signaling the detected violence depending on the detected opening state of the window or the door. Method according to Claim 16 in which the opening state can assume at least the states "open" and "closed", wherein a detected violence is only signaled when the opening state of the window or the door is not or only briefly "closed". Method according to Claim 17 in which the opening state may additionally assume the state of being "tilted", whereby a detected force effect in the state "tilted" is signaled only if the opening state of the window or the door is within a predetermined value Period after detection of the force action does not change in the state "closed". Method according to one of Claims 16 to 18 in which a link between the detected opening state and a detected force action by a logic unit (14), which is arranged together with at least one of the two sensor units (3, 7) in a housing (2). Method according to one of Claims 16 to 19 in which the second sensor unit (7) comprises a vibration sensor.

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