DE102015119613A1 - Device for detecting a state of a window or a door - Google Patents

Abstract

A device (1) for detecting a state of a window or door comprises at least a first sensor unit (3) for detecting a state of an open, tilted or closed window / door by means of a potentiometer as the first sensor (4) and one therewith connected actuator (5). 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.

Description

The invention relates to a device for detecting a state of a window or a door.

Such a device is commonly used e.g. used in 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 type.

The object of the present invention is therefore to provide an improved device for detecting a state of a window or a door

The object is achieved by a device having the features of claim 1.

A basic idea of the invention is to provide an already existing device with a second sensor unit, which is provided for detecting a further state of the window or the door and detects vibrations or oscillations.

Accordingly, a device for detecting a state of a window or a door includes at least a first sensor unit for detecting a state of an open, tilted or closed window / door by means of a potentiometer as the first sensor and an actuator associated therewith. The device is provided with at least one second sensor unit for detecting a further state of the window or the door, this state having vibrations caused by the action of force.

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 have little 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.

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 whose output signals are examined for 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.

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 are 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.

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 splitting of wood and / or plastic components, breaking, bending or crackling 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.

In this way, a state of a window or a door can be detected not only in a burglary or a force impact but also in accidents of all kinds with violence. This may be in addition to the first sensor unit 3 respectively. Detecting with the second sensor unit 7 but is also possible independently, for example if the first sensor unit 3 is defective (eg jammed by force) or is not activated.

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 detected can be 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.

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 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 13 and a transmitting unit 14 with an antenna.

The first sensor unit 3 with the first sensor 4 is with the evaluation unit 13 connected, which in turn to the transmitting unit 14 connected. This is in the document EP 1 918 890 B1 including the operation described in detail.

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 is also evaluated. 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 the sending unit 14 forwards.

The transmitting unit 14 sends this from the respective evaluation unit 12 . 13 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 15 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 15 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 15 also record and evaluate vibrations. These can be used to check the plausibility of the from the second sensor unit 7 detected signals are used.

For example, when 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 . 15 can also be 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 15 are summarized.

It is also possible that an additional common evaluation of the definitions of the evaluation units 12 . 13 and 14 can be done by another, higher-level evaluation.

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, 15

evaluation unit

14

transmission unit

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, 0026, 0028, 0040]

Claims (10)

Contraption ( 1 ) for detecting a state of a window or a door, comprising at least one first sensor unit ( 3 ) for detecting a state of an opened, tilted or closed window / door by means of a potentiometer as a first sensor ( 4 ) and an associated actuator ( 5 ), characterized in that the device ( 1 ) with at least one second sensor unit ( 7 ) is provided for detecting a further state of the window or the door, this state having vibrations caused by the action of force. Contraption ( 1 ) according to claim 1, characterized in that the at least one second sensor unit ( 7 ) at least one second sensor ( 8th ), which is a vibration sensor. Contraption ( 1 ) according to claim 2, characterized in that the at least one second sensor ( 8th ) is formed as a vibration sensor with at least one piezoceramic bimorph element. Contraption ( 1 ) according to claim 2 or 3, characterized in that the at least one second sensor ( 8th ) has at least one preferred direction of action. Contraption ( 1 ) according to one of the preceding claims, characterized in that the device ( 1 ) a control device ( 10 ) with an adaptation unit ( 11 ) for the at least one second sensor unit ( 7 ), two evaluation units ( 13 . 12 ) for each sensor unit ( 3 . 7 ) and a transmitting unit ( 14 ) having. Contraption ( 1 ) according to claim 5, characterized in that the adaptation unit ( 11 ) has at least one filter circuit for selectively filtering an output signal of the second sensor ( 8th ) serves. Contraption ( 1 ) according to claim 5, characterized in that the evaluation unit ( 12 ) for the second sensor unit ( 7 ) at least for an evaluation of the time length and amplitude of the signals of the second sensor unit ( 7 ) is trained. Contraption ( 1 ) according to claim 7, characterized in that the evaluation unit ( 12 ) for the second sensor unit ( 7 ) for analyzing signal waveforms of the signals of the second sensor unit ( 7 ), wherein a comparison is made with previously stored waveforms. Contraption ( 1 ) according to one of the preceding claims, characterized in that an additional evaluation unit ( 15 ), which of the first sensor unit ( 3 ) is assigned and examines their output signals to vibrations. Contraption ( 1 ) according to one of the preceding claims, characterized in that the at least one first sensor unit ( 3 ) and the at least one second sensor unit ( 7 ) in a common housing ( 2 ) are arranged.

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