EP3008705B1 - Break-in sensor for monitoring an entrance to a building to be monitored, method and alarm system thereof - Google Patents

Description

The present invention relates to an intrusion sensor for monitoring access to a building to be monitored, the intrusion sensor being arranged on the access on the inside of the building. The present invention further relates to a method for monitoring access to a building to be monitored.

State of the art

In many applications it is important today to recognize the unauthorized opening of a door or a window. For example, alarm systems for buildings can have intrusion detectors which are arranged on the individual doors and windows of a building and which serve to detect the opening of the door or the window.

If the alarm system is switched on, it can trigger an alarm if an unauthorized opening of a door or window in the building and an alarm signal e.g. transferred to a central registration office or the police.

The detection of an unauthorized opening of a door or a window of a building, i.e. a break-in through the door or the window, is carried out, for example, by a sensor which is designed to detect vibrations or shocks caused by the break-in at the door or occur in the window.

The DE602004011587T2 shows a conventional intrusion sensor for monitoring a building.

These vibrations can be caused, for example, by the burglary tool used on the door lock or the window, for example a lock pick or other lock picking instruments. These vibrations can also be caused, for example, by the use of brute force on the door to separate the door lock from the corresponding receptacle located in the door frame. This is the case, for example, when the door is entered.

The sensor is usually attached to the inside of the door or window, i.e. to the inside of the building. The sensor usually recognizes accelerations in all three spatial axes at the same time and reports them to the alarm system or to a microcontroller integrated in the sensor, which transmits an intrusion signal to the alarm system.

If a sensor is attached to the inside of the door or window that only monitors movement in the three spatial axes, false alarms can be triggered very easily since the sensor cannot detect the actual cause of the vibration.

For example, if a child on the floor inside the apartment encounters a door equipped with a sensor as described above while playing, it cannot be ruled out that the sensor will trigger a burglar alarm, even though there is no burglary. Since the sensor only detects the vibrations of the door, it cannot differentiate whether the door was shaken by an authorized person or by an unauthorized person. DE 10 2010 039 837 A1 discloses a method for controlling a portable device with a sensor unit.

US 2009/0015400 A1 describes a monitoring device for a container, which has a plurality of sensors.

WO 2006/123217 A1 shows a method using artificial intelligence to reduce false alarms in vehicles.

Disclosure of the invention

The present invention discloses an intrusion sensor with the features of claim 1 and a method with the features of claim 6.

Accordingly, it is provided:

An intrusion sensor for monitoring access to a building to be monitored, the intrusion sensor being arranged on the entrance on the inside of the building, with an acceleration sensor which is designed to detect movements of the intrusion sensor in at least one spatial axis and in the event of a movement to output a movement signal, in particular an acceleration signal, in the at least one axis, with an environment sensor which is designed to record at least one value of at least one physical variable in the environment of the Detect intrusion sensor, and with a plausibility check, which is designed to plausibility check the movement signal, in particular the acceleration signal, with the detected value of the physical quantity and to output a break-in signal in the event of a negative plausibility check.

It is also provided:

A method for monitoring an access to a building to be monitored, comprising the steps of detecting a movement of the access in at least one spatial axis and outputting a movement signal, in particular an acceleration signal, in the case of a movement in the at least one axis, recording at least one value of at least one physical quantity in the vicinity of the access on the inside of the building, plausibility check of the movement signal, in particular the acceleration signal, with the detected value of the physical quantity, and output of a break-in signal in the event of a negative plausibility check.

Finally, it is provided:

An alarm system with an alarm device which is designed to emit an alarm and with at least one intrusion sensor according to the invention which is designed to transmit an intrusion signal to the alarm device.

Advantages of the invention

The knowledge on which the present invention is based is that the detection of movements in three axes alone is not sufficient to avoid false triggering in the case of an intrusion sensor.

The idea on which the present invention is based is now to take this knowledge into account and to provide an intrusion sensor which, in addition to the detection of the movements of access to a building, also detects other physical variables in order to plausibility check the output of the acceleration sensor.

The present invention provides in particular to use physical variables for the plausibility check, which allow the sensor to draw conclusions about whether a person is on the outside of the entrance to the building or on the inside of the entrance to the building.

If the acceleration sensor detects a movement of the access, e.g. If a shake on a door is recognized and an acceleration signal is output, a value of at least one of the physical variables is recorded and used to check the plausibility of the acceleration signal.

If the acceleration signal is positively plausibility checked, ie if there is a person on the inside of the building in the vicinity of the entrance, no alarm is triggered despite the acceleration signal output by the acceleration sensor.

If the acceleration signal is given a negative plausibility check, ie if there is no person on the inside of the building in the vicinity of the entrance, an alarm is triggered on the basis of the acceleration signal output by the acceleration sensor.

The present invention thus makes it possible to significantly reduce the number of false alarms of an intrusion sensor and thereby to increase the area of use and the acceptance of such a sensor.

Advantageous embodiments and further developments result from the subclaims and from the description with reference to the figures.

In one embodiment, the ambient sensor is designed as a temperature sensor, which is designed to detect the temperature in the vicinity of the intrusion sensor. Since a person has a body temperature of approx. 37 ° C, the temperature on the inside of the building in the vicinity of the entrance can be recorded with the help of a temperature sensor and used to determine the presence of a person. This enables a precise plausibility check of the acceleration signal.

In one embodiment, the ambient sensor is designed as a moisture sensor, which is designed to detect the air humidity in the vicinity of the intrusion sensor. A person changes the temperature in their surroundings with their presence, as already described above. At the same time, the humidity changes the air around a person. The use of a moisture sensor therefore enables a further plausibility check of the acceleration signal.

In one embodiment, the environment sensor is designed as a sensor which is designed to detect a plurality of physical variables simultaneously in the environment of the intrusion sensor. By combining the acquisition of several physical quantities, the plausibility check can be further improved.

In one embodiment, the plausibility checking device has a memory and is designed to store a detected value of the physical variable at predetermined intervals and to calculate an average value of the detected values of the physical variable. If an average value is formed for the recorded values of the physical quantity, the course of the physical quantity over time can be used in the plausibility check.

In one embodiment, the plausibility checking device is designed to calculate a long-term mean value for all detected values of the physical quantity. This enables a very stable mean e.g. to be calculated in air-conditioned rooms.

Additionally or alternatively, the plausibility check is designed to calculate a moving average for a predetermined number of detected values of the physical quantity. This enables the mean value to be adjusted in the event of changing environmental conditions, e.g. if the temperature fluctuates over the course of a day.

In one embodiment, the intrusion sensor has a data interface which is designed to communicate with an air conditioning system of the building and to query the current building temperature from the latter. The queried building temperature can also be used for a comparison with the recorded value of the physical quantity.

In one embodiment, when the acceleration sensor outputs an acceleration signal, the plausibility check device is designed to query a current value of the physical quantity from the ambient sensor and compare it with the mean value, and to positively plausibility check the acceleration signal if the current value of the physical quantity is less than a given one Threshold deviates from the mean, and to make the acceleration signal negative if the current value of the physical quantity deviates from the mean by more than the predetermined threshold. This makes it possible to adapt the plausibility check to different applications.

For example, the threshold value can be adjusted in such a way that not only temperature changes by adults but also by children can be checked for plausibility. The threshold value can also be set in such a way that temperature changes or other changes in a physical quantity caused by animals, e.g. Cats or dogs, can be used for an accurate plausibility check.

The above refinements and developments can, if appropriate, be combined with one another as desired. Further possible refinements, developments and implementations of the invention also include combinations of features of the invention described above or below with reference to the exemplary embodiments, which are not explicitly mentioned. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

Brief description of the drawings

Fig. 1

ein Blockschaltbild einer Ausführungsform eines erfindungsgemäßen Einbruchsensors;

Fig. 2

ein Ablaufdiagramm einer Ausführungsform eines erfindungsgemäßen Verfahrens;

Fig. 3

ein Blockschaltbild einer weiteren Ausführungsform eines erfindungsgemäßen Einbruchsensors;

Fig. 4

ein Ablaufdiagramm einer weiteren Ausführungsform eines erfindungsgemäßen Verfahrens;

Fig. 5

ein Blockschaltbild eines Gebäudes mit einer Ausführungsform eines erfindungsgemäßen Einbruchsensors.

The present invention is explained in more detail below with reference to the exemplary embodiments given in the schematic figures of the drawings. It shows:

Fig. 1

a block diagram of an embodiment of an intrusion sensor according to the invention;

Fig. 2

a flow diagram of an embodiment of a method according to the invention;

Fig. 3

a block diagram of a further embodiment of an intrusion sensor according to the invention;

Fig. 4

a flow diagram of a further embodiment of a method according to the invention;

Fig. 5

a block diagram of a building with an embodiment of an intrusion sensor according to the invention.

In all the figures, elements and devices that are the same or have the same function, unless otherwise stated, have been provided with the same reference symbols.

In the context of this patent application, access to a building is understood to mean any access to a building that can be closed by a movable lock. Accesses according to the invention can be designed as doors, windows and the like.

Within the scope of this patent application, any sensor that is designed to record acceleration, movement, vibration or the like in at least one of the three spatial axes is regarded as an acceleration sensor. An acceleration sensor according to the invention can also record acceleration, movement, vibration or the like in all three spatial axes.

In the context of this patent application, a positive plausibility check means that the plausibility check shows that a person is on the inside of the building near the entrance, so that the presence of the person can be determined by recording the physical quantities.

In the context of this patent application, a negative plausibility check means that the plausibility check shows that there is no one on the inside of the building near the entrance.

Embodiments of the invention

Fig. 1 shows a block diagram of an embodiment of an intrusion sensor 1 according to the invention.

The intrusion sensor 1 in Fig. 1 is arranged on a door 2 and has an acceleration sensor 4 which is coupled to a plausibility check 9. Furthermore, the intrusion sensor 1 in Fig. 1 an environmental sensor 6, which is also coupled to the plausibility check 9.

The intrusion sensor of the Fig. 1 is used to monitor door 2, which represents access to a building to be monitored. The intrusion sensor 1 is arranged on the door 2 on the inside of the building.

The acceleration sensor 4 serves to detect movements of the intrusion sensor 1 in at least one spatial axis. This is always the case when the door 2 is moved or e.g. a burglar at door 2 is troubled. If the door 2 moves, the acceleration sensor 4 outputs an acceleration signal 5 to the plausibility check 9.

The ambient sensor 6 detects a value 7 of the temperature 8 in the vicinity of the intrusion sensor 1. In one embodiment, the ambient sensor 6 can also be designed to additionally or alternatively, other physical variables 8, e.g. to detect the air humidity 8. The detected value of the temperature 8 is provided by the environmental sensor 6 of the plausibility check 9. In further embodiments, the environmental sensor 6 can be designed as any sensor that is suitable for detecting the presence or absence of a person or another living being. This can e.g. be an infrared sensor.

Finally, the plausibility check 9 validates the acceleration signal 5 with the aid of the detected values 7 of the temperature 8. In the event of a negative plausibility check, the plausibility check 9 outputs a break-in signal 10. If the environmental sensor 6 is designed to additionally or alternatively, other physical variables 8, e.g. to detect the air humidity 8, these recorded values can also be used in the plausibility check.

Fig. 2 shows a flow chart of an embodiment of a method according to the invention.

The method according to the invention provides in a first step S1 to detect a movement of the access 2, 3 in at least one spatial axis and to output an acceleration signal 5 in the case of a movement in the at least one axis in a second step S2.

In a third step S3, at least one value 7 of at least one physical variable 8 is recorded in the vicinity of the access 2, 3 on the inside of the building 14.

The method further provides for the plausibility check S4 of the acceleration signal 5 with the detected value 7 of the physical quantity 8 and the output S5 of an intrusion signal 10 in the event of a negative plausibility check.

Fig. 3 shows a block diagram of a further embodiment of an intrusion sensor 1 according to the invention.

The intrusion sensor 1 of the Fig. 3 is based on the intrusion sensor 1 Fig. 1 and differs from this in that the plausibility checking device 9 has a memory 11 and is designed to store a detected value 7 of the physical variable 8 at predetermined intervals and to calculate an average value 12 of the detected values 7 of the physical variable 8.

Here, the plausibility check 9 forms a long-term mean 12 for all the recorded values 7 of the physical quantity 8. In one embodiment, the plausibility check 9 can also calculate a moving average 12 for a predetermined number of recorded values 7 of the physical quantity 8.

The plausibility check 9 of the Fig. 3 is also designed to query an actual value 7 of the physical quantity 8 from the ambient sensor 6 when the acceleration signal 5 is output by the acceleration sensor 4 and to compare it with the mean value 12.

If the current value 7 of the physical quantity 8 deviates from the mean value 12 by more than a predetermined threshold value 13, the plausibility check 9 makes the acceleration signal 5 positive and no break-in signal 10 is output.

If the current value 7 of the physical quantity 8 deviates from the mean value 12 by less than the predetermined threshold value 13, the plausibility check device 9 makes the acceleration signal 5 plausible and an alarm is triggered or an intrusion signal 10 is output.

In one embodiment, the environmental sensor 6 is designed as a sensor 6, which is designed to detect a plurality of physical variables 8 simultaneously in the environment of the intrusion sensor 1. For example, the sensor 6 can detect temperature and air humidity.

In one embodiment, the intrusion sensor 1 has a data interface which is designed to communicate with an air conditioning system of the building 14 and to query the current building temperature from the latter. The queried building temperature can also be used for a comparison with the recorded value of the physical variable 8.

Fig. 4 shows a flow chart of a further embodiment of a method according to the invention.

The procedure of Fig. 4 is based on the process of Fig. 2 and differs from this in that the step of plausibility checking S4 provides for storing a detected value 7 of the physical variable 8 at predetermined intervals S6 and calculating S7 a mean value 12 of the recorded values 7 of the physical variable 8.

When calculating S7 of the mean value 12, a long-term mean value 12 can be calculated for all recorded values 7 of the physical quantity 8. Additionally or alternatively, when calculating S7 of the mean value 12, a moving mean value 12 can be calculated for a predetermined number of detected values 7 of the physical quantity 8.

Furthermore, the method provides for plausibility checking S4 that when an acceleration signal 5 is output by the acceleration sensor 4, a current value 7 of the physical quantity 8 is detected S8 and compared with the mean value S9.

The acceleration signal 5 is positively checked for plausibility if the current value 7 of the physical variable 8 deviates from the mean value 12 by more than a predetermined threshold value 13. Furthermore, the acceleration signal 5 is negatively checked for plausibility if the current value 7 of the physical variable 8 deviates from the mean value 12 by less than the predetermined threshold value 13.

Fig. 5 shows a block diagram of an alarm system 16 with an embodiment of an intrusion sensor 1 according to the invention.

The alarm system 16 is arranged in a building 14. Building 14 of the Fig. 5 is only shown schematically by two wall sections 14 which have an opening in which a window 3 is arranged, on which an intrusion sensor 1 according to the invention is arranged.

An arrow running in a curve shows in Fig. 5 the opening direction of the window 3 is displayed.

The opening direction in Fig. 5 is only shown as an example and does not necessarily have to refer to the in Fig. 5 shown vertical spatial axis may be limited. If the door / window is damaged with great force, a tilt and turn movement can also occur, for example, which is not only described by the vertical axis of the room.

The alarm system 16 has an alarm transmitter 15 which is coupled to the intrusion sensor 1.

The intrusion sensor 1 is designed to transmit an intrusion signal 10 to the alarm transmitter 15, which then emits an alarm.

Although the present invention has been described above on the basis of preferred exemplary embodiments, it is not restricted to these but can be modified in a variety of ways. In particular, the invention can be changed or modified in a variety of ways without departing from the essence of the invention.

Claims (11)

1. Intrusion sensor (1) for monitoring an entrance (2, 3) to a building (14) to be monitored, wherein the intrusion sensor (1) is arranged at the entrance (2, 3) on the inside of the building (14),
   having an acceleration sensor (4) which is designed to capture movements of the intrusion sensor (1) in at least one spatial axis and to output a movement signal, in particular an acceleration signal (5), in the event of a movement in the at least one axis;
   having an environmental sensor (6) which is designed to capture at least one value (7) of at least one physical variable (8) in the environment of the intrusion sensor (1); and
   having a plausibility checking device (9) which is designed to check the plausibility of the movement signal, in particular the acceleration signal (5), using the captured value (7) of the physical variable (8) and to output an intrusion signal (10) in the case of a negative plausibility check.
2. Intrusion sensor according to Claim 1, characterized in that
   the environmental sensor (6) is in the form of a temperature sensor which is designed to capture the temperature in the environment of the intrusion sensor (1),
   and/or is in the form of a humidity sensor which is designed to capture the humidity in the environment of the intrusion sensor (1).
3. Intrusion sensor according to one of the preceding claims,
   characterized in that
   the plausibility checking device (9) has a memory (11) and is designed to store a captured value (7) of the physical variable (8) at predefined intervals and to calculate an average (12) of the captured values (7) of the physical variable (8).
4. Intrusion sensor according to Claim 3,
   characterized
   in that the plausibility checking device (9) is designed to calculate a long-term average (12) for all captured values (7) of the physical variable (8); and/or
   in that the plausibility checking device (9) is designed to calculate a sliding average (12) for a predefined number of captured values (7) of the physical variable (8) .
5. Intrusion sensor according to Claim 3, characterized in that the plausibility checking device (9) is designed
   to request a current value (7) of the physical variable (8) from the environmental sensor (6) and to compare it with the average (12) if an acceleration signal (5) is output by the acceleration sensor (4), and
   to provide a positive plausibility check of the acceleration signal (5) if the current value (7) of the physical variable (8) differs from the average (12) by more than a predefined threshold value (13); and
   to provide a negative plausibility check of the acceleration signal (5) if the current value (7) of the physical variable (8) differs from the average (12) by less than the predefined threshold value (13).
6. Method for monitoring an entrance (2, 3) to a building (14) to be monitored, having the steps of:

   capturing (S1) a movement of the entrance (2, 3) in at least one spatial axis and outputting (S2) a movement signal, in particular an acceleration signal (5), in the event of a movement in the at least one axis;

   capturing (S3) at least one value (7) of at least one physical variable (8) in the environment of the entrance (2, 3) on the inside of the building (14);

   checking the plausibility (S4) of the movement signal, in particular the acceleration signal (5), using the captured value (7) of the physical variable (8); and

   outputting (S5) an intrusion signal (10) in the case of a negative plausibility check.
7. Method according to Claim 6,
   wherein the temperature and/or the humidity is/are captured when capturing (S3) at least one value (7) of at least one physical variable (8).
8. Method according to either of Claims 6 and 7,
   wherein the plausibility checking (S4) provides for a captured value (7) of the physical variable (8) to be stored (S6) at predefined intervals and for an average (12) of the captured values (7) of the physical variable (8) to be calculated (S7).
9. Method according to Claim 8,
   wherein a long-term average (12) for all captured values (7) of the physical variable (8) is calculated when calculating (S7) the average (12); and/or
   wherein a sliding average (12) for a predefined number of captured values (7) of the physical variable (8) is calculated when calculating (S7) the average (12).
10. Method according to Claim 8,
    wherein a current value (7) of the physical variable (8) is captured (S8) and is compared (S9) with the average (12) during the plausibility checking (S4) if an acceleration signal (5) is output by the acceleration sensor (4), and
    the acceleration signal (5) has a positive plausibility check if the current value (7) of the physical variable (8) differs from the average (12) by less than a predefined threshold value (13); and
    the acceleration signal (5) has a negative plausibility check if the current value (7) of the physical variable (8) differs from the average (12) by more than the predefined threshold value (13).
11. Alarm system (16),
    having an alarm transmitter (15) which is designed to output an alarm; and
    having at least one intrusion sensor (1) according to one of Claims 1 to 6 which is designed to transmit an intrusion signal (10) to the alarm transmitter (15).

Images