EP3097547B1 - Method and apparatus for determining an unauthorized intrusion to a door - Google Patents

Description

The invention relates to a method and a device for determining unauthorized entry at a door, in particular a door which protects a room from unauthorized entry, e.g. the front door, the garage door, the apartment door, etc.

State of the art

From the EP 0 403 588 A1 a system is known in which an infrared light beam is directed onto a door and wherein the infrared light beam reflected by the door is used to detect an unauthorized entry. The system consumes considerable energy and is not optimal for independent operation in which it is only fed by a normal battery.

In the US 8,253,563 B2 describes several sensors and a microcontroller, which together form a system for detecting a forced entry into a door, based on statistically determined sensor signals. The disadvantage here is that when the forced entry at the door is detected, no physical quantities are taken into account that describe the position and movement of the door.

Furthermore, in the EP 1 652 159 A2 a gyroscope, a MEMS accelerometer, a piezo accelerometer, and a magnetic field sensor are used. The principle for detecting door movement is based on audio signals. To achieve this, an extensive and expensive device for signal processing is necessary, since audio signals have to be generated and evaluated. This complex facility also has a high energy requirement in operation.

The font DE202009010418 U1 discloses a system for detecting a movement of a door by means of an acceleration sensor which detects the acceleration of the door leaf in all three spatial directions.

Disclosure of the invention

The invention creates a method for determining unauthorized entry into a door with the features of claim 1 and a device for determining unauthorized entry into a door with the features of claim 10.

Preferred further developments are the subject of the subclaims.

Advantages of the invention

The present invention provides a method and a device with which an unauthorized intrusion at the door or at some other closure of an opening in a wall, for example a window or a gate, hereinafter referred to as a door, can be reliably determined by, on the one hand, a movement the door is determined by means of a movement sensor and the movement is evaluated on the basis of parameters by means of which an unauthorized from an authorized intrusion at the door can be distinguished. On the other hand, it is verified whether an identified unauthorized intrusion was successful by determining the opening angle of the door by an angle measurement sensor and determining whether the door has been opened or is still within a tolerance range for a closed door.

The idea on which the present invention is based consists in detecting the movement of the door as a function of time based on a movement sensor, since unauthorized intrusion at the door, e.g. opening the door by means of a lock pick has a characteristic movement sequence of the door that can be distinguished from other events at the door and the associated movement of the door. For this purpose, parameters are determined from the movement sequence, on the basis of which the movement sequence for an unauthorized entry can be distinguished from other events at the door.

In one embodiment of the invention, the angle measuring sensor is only activated by the receiving and evaluating device in order to detect the opening angle of the door when an unauthorized intrusion is determined by the receiving and evaluating device. This can reduce the energy consumption, since the angle measurement sensor does not have to be constantly activated. In addition, the signals from the angle measurement sensor are evaluated by the receiving and evaluation device only to determine whether the detected unauthorized intrusion opened the door or not. If, on the other hand, no unauthorized intrusion is detected, the signals from the angle measurement sensor are also not evaluated. This can also save energy.

In a further embodiment of the invention, the motion sensor detects the application of a force to the door in a stand-by mode in step a) and sends a signal, for example a binary signal, to the receiving and evaluation device when the force is applied to the door Exceeds the minimum force threshold. As soon as the receiving and evaluating device receives the signal from the movement sensor, the receiving and evaluating device activates the movement sensor in the active mode, so that the movement sensor does not only detect a force that is greater than a predetermined threshold value, but now the course of movement of the door in all three spatial axes as a function of time. The energy consumption can also be reduced by initially operating the motion sensor in a stand-by mode before performing more extensive measurements in an active mode.

In one embodiment of the invention, the receiving and evaluation device activates a timer in step b) if unauthorized entry at the door is determined, with the determination of the opening angle in step c) and the comparison of the opening angle with the threshold value in step d) as long are repeated until either it is determined within the specified time span in step e) that the door is open, or the time span specified by the timer has expired and no opening of the door has been determined in step e), the receiving and evaluation device on the status -by mode returns in step a) if the specified period of time has expired and no opening of the door is determined in step e). By setting a timer for a predetermined period of time within which the steps of determining the opening angle and comparing the threshold value of the opening angle of the door are repeated, the opening angle can be prevented from being continuously checked even if no opening of the door is detected. Instead, it is possible to return to the stand-by mode and only when a suitably high force is applied to the door can it be determined whether there has been a successful unauthorized entry into the door.

In another embodiment of the invention, parameter areas for several events of an unauthorized intrusion are stored in the memory device so that they can be called up, wherein in step b) the receiving and evaluation device determines that there is an event of unauthorized entry at the door if the actual value of the respective parameter is within the assigned parameter range for the event of unauthorized entry. Examples of events for unauthorized entry at the door are events such as unauthorized entry at the door using a lockpick, unauthorized entry at the door using a crowbar and / or unauthorized entry at the door by ramming the door with the body. Parameter areas for each spatial axis are assigned to each of these events and stored in the memory device so that they can be called up in order to be compared with corresponding actual values of the parameters.

Furthermore, in a further embodiment of the invention, parameter areas for several events of an authorized intrusion are stored in the memory device so that they can be called up, the events for the authorized intrusion at the door, for example, events such as the authorized intrusion at the door by knocking on the door, the authorized Intrusion at the door by pushing a toy car against the door, authorized intrusion at the door by pushing a shopping bag against the door and / or authorized intrusion at the door by opening the door using the associated key. In step b), the receiving and evaluation device determines that an event of authorized entry has occurred at the door if the actual value of the respective parameter is within the assigned parameter range for the event of authorized entry. The receiving and evaluation device then returns to step a) in standby mode. This has the advantage that in the event of an authorized intrusion at the door, no further detection and evaluation of the opening angle of the door is necessary and therefore a first check is carried out when a sufficiently large force is again applied to the door and detected by the motion sensor.

Parameters that can be used to check unauthorized and authorized entry into the door in at least one of the spatial axes are, for example, an amplitude level, a period duration, a duration of a pause between two successive periods, a number of amplitudes which exceed a predetermined amplitude level and / or a duration of the pause between two amplitudes which exceed a predetermined amplitude level. For example, the parameters for determining the unauthorized and authorized intrusion can be the same or different for each of the spatial axes, depending according to which parameters are suitable for a spatial axis to distinguish between unauthorized and authorized intrusion at the door.

In one embodiment of the invention, the alarm signal is transmitted to an alarm device and / or to at least one external electronic device, the external electronic device, for example, a mobile phone, a smartphone, a server, a WLAN router, a PC or a tablet PC The owner of the room locked with the door, the police or a security service. The alarm device can be part of the device for determining unauthorized entry at the door or can be coupled to it. For example, the alarm device can be provided with a socket for power supply in the room closed by the door and emit an optical and / or acoustic warning signal as soon as the alarm device receives the alarm signal.

In a further embodiment of the invention the motion sensor is e.g. an acceleration sensor and the angle measuring sensor e.g. a gyroscope. Such sensors are made available in large numbers for consumer goods and are therefore usually inexpensive sensors.

Fig. 1

eine Vorrichtung zur Bestimmung eines unberechtigten Eindringens an einer Tür gemäß einer Ausführungsform der Erfindung;

Fig. 2

ein Diagramm verschiedener Bewegungssignale eines Beschleunigungssensors in einer Raumachse;

Fig. 3

ein weiteres Diagramm, welches ein Bewegungssignal eines Beschleunigungssensors in einer Raumachse zeigt; und

Fig. 4

ein Ablaufdiagramm eines Verfahrens zur Bestimmung eines unberechtigten Eindringens an einer Tür mittels der Vorrichtung gemäß Fig. 1.

Further features and advantages of the present invention are explained below with reference to the figures. Show it:

Fig. 1

a device for determining an unauthorized entry at a door according to an embodiment of the invention;

Fig. 2

a diagram of various movement signals of an acceleration sensor in a spatial axis;

Fig. 3

a further diagram showing a movement signal of an acceleration sensor in a spatial axis; and

Fig. 4

a flow chart of a method for determining an unauthorized entry at a door by means of the device according to FIG Fig. 1 .

Embodiments of the invention

In Fig. 1 a device for determining an unauthorized entry at a door according to an embodiment of the invention is shown.

The present invention is based on a micromechanical (MEMS) acceleration sensor 10 and a micromechanical (MEMS) gyroscope 11, both of which provide data in all three spatial axes, i. the X-, Y-, and Z-axis. Such micromechanical (MEMS) acceleration sensors 10 and micromechanical (MEMS) gyroscopes 11 are developed and manufactured in large numbers for consumer goods and are therefore generally inexpensive sensors. Instead of an acceleration sensor 10 as a movement sensor, however, any other sensor can be used which is suitable for detecting a movement profile of the door as a function of time. Furthermore, in addition to the gyroscope 11, any other angle measuring sensor can be used which is suitable for determining the opening angle of the door by which it is deflected from the closed state.

The sensors 10, 11 described herein and the method described herein are particularly powerful. The present invention can determine an unauthorized intrusion not only via the door but possibly also partly via windows, based on occurring movements, in particular accelerations and angle changes over time at the window, i.e. physical quantities that directly reflect mechanical door movements. For example, a movement of the door in at least one spatial axis can also be triggered if a person tampered with a window of the room closed by the door, for example using a crowbar, instead of directly at the door. Corresponding vibrations of the window can lead to vibrations or movements of the closed door, which in turn can be detected by the acceleration sensor 10 and the gyroscope 11. The micromechanical gyroscope 11 integrates changes in the angle of the door over time.

As will be described below, the micromechanical (MEMS) acceleration sensor 10 and the micromechanical (MEMS) gyroscope 11, as preferred examples of a motion sensor and an angle measurement sensor, are connected to a receiving and evaluating device 12, for example a microcontroller, for receiving purposes and evaluating the signals of the sensors 10, 11. The receiving and evaluating device 12 can be used to carry out logical operations. For example, the receiving and evaluating device 12 can carry out a series of evaluations or evaluations as well as a test based on the signals received from the sensors in order to detect or determine a movement of the door in a respective spatial axis. The combination of the movement of the door in the three spatial axes as a function of time enables unauthorized entry through the door to be reliably determined. Impacts that are applied to the door in order to gain unauthorized entry, such as opening the door and the door lock by breaking it with a crowbar or using a lockpick, etc., are distinguished from impacts on the door that occur during normal access situations, such as opening the door using the associated key or knocking on the door or bumping into the door with a shopping bag or a children's toy, etc.

The device for determining unauthorized entry at the door 13 has in FIG Fig. 1 the micromechanical (MEMS) acceleration sensor (BMA) 10 and the micromechanical (MEMS) gyroscope (BMG) 11 as examples of a motion sensor and an angle measuring sensor, as well as the receiving and evaluation device 12 for receiving and determining a door movement based on the signals of the Acceleration sensor 10 and the gyroscope 11, as in Fig. 1 is shown. The acceleration sensor or three-axis acceleration sensor detects the acceleration in m / s ² in all three spatial axes as a function of time. The gyroscope or the yaw rate sensor as an example of an angle measuring sensor detects the angular degree per second. The opening angle of the door can be calculated by the receiving and evaluation device, for example by integrating the rotation rate signals received from the gyroscope.

Furthermore, the device for determining the unauthorized entry at the door 13 has a transmitting device 14 which is connected to the receiving and evaluating device 12 and can be coupled to an external electronic device 15 for sending an alarm signal to the receiving and evaluating device 12, e.g. an unauthorized intrusion at the door due to an event such as of opening the door with a lock pick.

The external electronic device 15 is in Fig. 1 indicated with a dashed line and for example a cell phone, a smartphone, a fax machine, a laptop, a tablet PC, a server, etc. eg the owner of the door in front of an unauthorized person Penetration of the area to be protected, the police or a security company, etc. The transmitting device 14 can be wired or wireless, e.g. via radio signals, etc., connected to the external electronic device 15 for the wired or wireless transmission of the alarm signal of the receiving and evaluation device 12 to the external electronic device 15. In addition to the information that an unauthorized intrusion is present, the alarm signal can also contain additional information, such as the type of unauthorized intrusion, e.g. unauthorized opening of the door with a lockpick or unauthorized opening of the door by ramming the door etc., the time of the unauthorized entry, the door at which the unauthorized entry occurred, etc.

Furthermore, the device for determining unauthorized entry at a door 13 has a power supply device 16, in particular at least one battery, for supplying the acceleration sensor 10, the gyroscope 11, the receiving and evaluation device 12 and the transmitting device 14 with energy. The acceleration sensor 10, the gyroscope 11, the receiving and evaluating device 12 and / or the transmitting device 14 can be arranged in a housing 17, for example on a printed circuit board (PCB), not shown, which is mechanically coupled to the door. Furthermore, for example, the power supply device 16 is also provided in the housing 17, as in FIG Fig. 1 is shown.

In addition, the device for determining unauthorized entry at a door 13 optionally has an additional alarm device 18, as shown by a dotted line in FIG Fig. 1 is indicated, or is coupled with such. By means of the alarm device 18, a warning signal, in particular an optical and / or acoustic warning signal, is output when the receiving and evaluation device 12 determines an unauthorized entry into the door. The alarm device 18 can be part of the device for determining unauthorized intrusion on a door 13 and in the housing 17. The alarm device 18 can also be fed with energy by the energy supply device 16. Furthermore, the alarm device 18 can also be arranged outside the device for determining unauthorized entry at a door 13 within, for example, the room closed by the door and connected there to an energy supply device, e.g. a socket, or have its own energy supply device. The alarm device 18 is coupled wirelessly or wired to the device for determining unauthorized entry at a door 13 and triggers a warning signal as soon as it receives the alarm signal from the receiving and evaluation device 12.

Furthermore, the receiving and evaluating device 12 has a storage device 19. In this case, areas for values of parameters are stored in the memory device 19, which are based on the motion sensor, e.g. Acceleration sensor 10, can be obtained and identify movement patterns of the door in the three spatial axes for unauthorized and authorized entry at the door.

The range for values of the parameters in all three spatial axes for various events of unauthorized intrusion, such as opening the door lock using a lockpick, opening the door using a crowbar and various events of authorized intrusion, e.g. opening the door using the associated key, knocking on the door, knocking on the door using a toy by a child or pushing the door using a shopping bag, etc. can be stored in the storage device by the receiving and evaluation device . The receiving and evaluation device 12 uses the movement signals detected by the acceleration sensor 10 to determine the actual values of the parameters and compares these with the areas of these parameters stored in the memory device for the various events of authorized and unauthorized entry at the door. If the actual values of the parameters, for example for at least one or preferably all spatial axes, fall in the assigned stored areas for an event of unauthorized intrusion, then in a next step it is checked whether the door is opened or not. For this purpose, the opening angle of the door, by which it is deflected from its closed position, is calculated or evaluated by the receiving and evaluating device 12 from the rotation rate signals recorded by the gyroscope 11. The receiving and evaluating device 12 compares the actual opening angle with a threshold value for a closed door, the threshold value also being stored in the memory device so that it can be called up. If the actual value exceeds the threshold value, the receiving and evaluation device 12 determines that the unauthorized opening of the door was successful and the door e.g. could be opened by means of a lock pick. In this case, the receiving and evaluating device 12 emits an alarm signal.

The device for determining an unauthorized entry at a door 13 is preferably provided on the inside of the door, which by an unauthorized Intruder is not accessible from the outside. The device for determining unauthorized entry 13 on a door is fastened with its housing to a door surface on the inside of the door, for example glued on, screwed on, etc.

In Fig. 2 shows a diagram for various examples of a movement profile of the door as a function of time. More precisely are in Fig. 2 Examples of the acceleration of the door as a function of the time that the door experiences when there is an authorized or unauthorized intrusion at the door. The acceleration of the door as a function of time is in Fig. 2 shown as an example for a spatial axis. The acceleration of the door as a function of time based on the respective event of authorized or unauthorized intrusion at the door exhibits a specific movement pattern or a characteristic course in the respective spatial axis.

The acceleration of the door as a function of time can be determined by the acceleration sensor for each spatial axis and transmitted to the receiving and evaluating device and evaluated there.

An event which is assessed as a legitimate intrusion at the door is when the door is closed and does not experience any knocks or the like that lead to a movement or acceleration of the door. This case is in the first area 1 in Fig. 2 shown. A door that exhibits such a movement pattern is determined to be closed or to remain closed. The slight vibrations in the first area 1 only show a noise from the acceleration sensor.

The second area 2 also shows the event of unauthorized entry through the door by means of a lockpick. The diagram shows the course of the door movement when the lock of the door is picked with a lock pick or a comparable device. The signals from the gyroscope determine whether the lock was actually cracked and the door opened.

Furthermore, the third area 3 shows the event of knocking on the door as an authorized intrusion. Knocking on the door can be determined, for example, on the basis of empirical values using several test persons. A knocking process has, for example, one to three successive hits. The in Fig. 2 The third area 3 shown represents knocking at different positions on the door.

The fourth area 4 represents the event of unauthorized intrusion by ramming the door with the body. The gyroscope can be used to determine whether or not the door could actually be opened when the body was rammed.

The fifth area 5 represents the event of authorized entry by bumping into the door with a toy car.

The legitimate intrusion events shown, i.e. the first, third and fifth areas 1, 3 and 5, and unauthorized intrusion, i.e. of the second and fourth area 2 and 4, can be separated from each other, for example, by determining parameters such as the amplitude maximum of the oscillation, the number of amplitudes, the period duration, the pauses between two successive periods and / or the pauses between two periods which have a predetermined Exceed amplitude maximum, etc. differentiate from one another.

For example, the amplitude maxima of the first region are 1, i.e. The closed door experiences no impacts between an upper and a lower threshold value for an amplitude level of a vibration which is generated by the noise of the acceleration sensor. In addition, the pause between two successive periods and the period duration lie within an assigned, predetermined range for a closed door which does not experience any knocks or the like.

The event of the second area 2, the unauthorized entry at the door by means of a lockpick, can be transferred from the other areas 1 and 3-5 e.g. can be distinguished in that the amplitude level lies within a range in which the amplitude level is greater than the amplitude level of the oscillation of the first area 1 and smaller than the amplitude level of the third, fourth and fifth areas 3, 4 and 5. Furthermore, the pauses are between two periods which exceed a predetermined amplitude level is smaller than, for example, in the third area 3.

Fig. 3 shows a further diagram which shows a movement signal of the acceleration sensor in a spatial axis. The diagram is purely schematic and greatly simplified.

How out Fig. 3 can be seen, the amplitude of the acceleration of the door is shown as a function of time t. In Fig. 3 the period duration is denoted by t_Impuls, the amplitude level as t_Höhe and the duration of the pause between two successive periods as t_Pause. Furthermore, an upper threshold value and a lower threshold value for the amplitude level are in Fig. 3 drawn. The parameters such as the period duration t_Impluse, the duration of the pause t_Pause between two successive periods, as well as the respective amplitude level t_Höhe can be used to determine an event of an unauthorized or an authorized intrusion at the door.

Indicates a movement path of the door in the in Fig. 1 spatial axis shown, a sequence of pulses with an amplitude that is greater than a threshold value and exceeds a predetermined time span or period t_implus, and is interrupted by pauses between two periods of a duration t_pause, the receiving and evaluation device of the device to determine an unauthorized entry at a door, for example, it was established that a certain amount of force was exerted on the door in this spatial axis, which probably corresponds, for example, to breaking the door open. Since the breaking open of the door represents an unauthorized entry, an algorithm of the device for determining an unauthorized entry at a door goes into the next one Fig. 4 to the "pre-alarm" state.

If the door is actually opened in the “pre-alarm” state, which can be detected by means of the gyroscope, the algorithm of the device for determining unauthorized entry into a door changes the “pre-alarm” state to “unauthorized entry detected” and emits an alarm signal to the alarm device and / or to an external electronic device, for example a server of a security company, etc. For example, a radio interface can be provided via which the alarm signal is output from the receiving and evaluation device to the external electronic device.

In Fig. 4 FIG. 14 is a flow chart for determining an unauthorized entry at a door by means of the device according to FIG Fig. 1 shown.

In a first step S1 , the device for determining unauthorized entry to a door is in what is known as a “stand-by” mode or sleep state.

In the “stand-by” mode, the micromechanical (MEMS) acceleration sensor sends a signal to the receiving and evaluation device when a force is applied to the door and this exceeds a predetermined threshold value. The signal from the acceleration sensor is preferably only a binary signal in order to inform the receiving and evaluation device that a suitably large force is being applied to the door. The receiving and evaluation device then activates the acceleration sensor in such a way as to detect the acceleration of the door in all three spatial axes as a function of time.

This has the advantage that the device for determining unauthorized entry into a door requires less energy, since in the "standby" mode the acceleration sensor is set in such a way that it initially only determines whether a sufficiently large force is being applied to the door and the information about the application of the sufficiently large force to the door of the receiving and evaluation device is transmitted. As a result, the device for determining unauthorized entry into a door requires very little energy, for example only a few μA, since no additional generation and evaluation of movement signals from the acceleration sensor and signals from the gyroscope in one or more spatial axes is carried out by the receiving and evaluation device.

Only after the receiving and evaluating device has received the information from the acceleration sensor that a suitably large force is being exerted on the door does the receiving and evaluating device activate or adjust the acceleration sensor in all three spatial directions as a function of the acceleration of the door Capture time. Furthermore, sending the information that a force is being applied to the door, for example in the form of a binary signal, to the receiving and evaluation device also requires little energy. The gyroscope can also initially be switched off or in a stand-by mode and initially do not carry out any measurements and only be switched on or activated by the receiving and evaluation device to carry out measurements if this, as described below, results in an unauthorized intrusion at the door has determined by means of the acceleration sensor. This can also save additional energy.

A movement signal of the acceleration sensor in a spatial axis is generated when the door, in particular the closed door, executes a movement in this spatial axis, as in FIG Fig. 2 and 3 is shown as an example. The closed door can move in the three spatial axes or the X, Y and Z axes, in the event of an event such as, for example, when a child hits the door with his toy, when someone knocks on the door, when someone tries to open the door forcibly with a lock pick or if, for example, a window in the room closed by the door is pried open by a crowbar, etc. The movement or acceleration of the door in the respective room axis is sent as a movement signal to the receiving and Transferred evaluation device and evaluated there.

With the help of the micromechanical (MEMS) gyroscope, the opening angle of the door can in turn be determined or calculated, if this e.g. is opened. The micromechanical (MEMS) gyroscope is used to determine, for example, the opening angle by which the door is opened or deflected from its closed position. This opening angle can in turn be used to determine whether an unauthorized entry through the door was successful or not, as will be explained below.

If a signal, for example a binary signal, is received from the acceleration sensor that a force is being exerted on the door which has exceeded a threshold value, ie step S1: Yes, the device for determining unauthorized entry into a door proceeds in a second step S2 from the "stand-by" mode to an "active" mode. The device for determining an unauthorized entry into a door that was previously in the "sleep" state is now woken up and the acceleration sensor is activated to detect the movement or acceleration of the door in all three spatial axes as a function of time.

If, on the other hand, no signal from the acceleration sensor is received or no or no sufficiently large force is exerted on the door, ie step S1: No, the device for determining unauthorized entry into a door remains in "standby" mode.

In the "active" mode, the receiving and evaluating device evaluates the acceleration of the door detected by the acceleration sensor as a function of the time in all three spatial axes. The receiving and evaluating device uses the acceleration sensor to determine at least one parameter for each of the spatial axes, e.g. the amplitude level t_Höhe, the period duration t_Impulse, the duration of a pause t_Pause between two successive periods, the number of amplitudes which exceed a predetermined amplitude level, the duration of the pause between two amplitudes which exceed a predetermined amplitude level, etc. The at least one parameter, which the receiving and evaluating device determines for each spatial axis can be the same parameter and / or a different parameter for each of the spatial axes.

The receiving and evaluating device compares the measured value or actual value of the parameter of the respective spatial axis with value ranges of the parameter stored in the memory device for a corresponding event of authorized or unauthorized intrusion at the door in the respective spatial axis. Events for an unauthorized intrusion are e.g. opening the door with a lockpick, ramming the door with the body or another correspondingly heavy object such as a battering ram, etc., breaking the door open with a crowbar, breaking a window of the room closed by the door with a crowbar etc. Events for a legitimate intrusion are e.g. knocking on the door, opening the door with the assigned key, bumping into the door with a toy car, etc.

The named examples for parameters in a spatial axis, on the basis of which authorized or unauthorized entry through a door is determined, are only exemplary and the invention is not limited to the parameters mentioned.

The parameters of the three spatial axes, which are evaluated by the receiving and evaluation device, are preferably selected and combined with one another in such a way that they represent a movement pattern of the door in the three spatial axes for a corresponding event of authorized or unauthorized entry through the door. As described above, the parameters can be the same or different for each spatial axis.

In this way, by determining the parameters by means of the sensors and comparing the values of the parameters with areas stored in the memory device, it can be determined which event is present at the door and whether it is an authorized or unauthorized entry into the door.

If, after comparing the movement signals received from the door with areas stored in the memory device for all spatial axes in step S2 , the receiving and evaluation device determines, for example, that there is an authorized intrusion in the form of opening the door with the assigned key, i.e. step S2: No, the device for determining an unauthorized entry at a door returns to step S1 in the "stand-by" mode.

If, after comparing the movement signals received from the door with the areas stored in the memory device for at least one of the spatial axes, the receiving and evaluation device determines in step S2 that the door is unauthorized, e.g. in the form of opening the door with a lock pick , ie step S2: Yes, the receiving and evaluation device switches on a timer or timer in a step S3 or activates it. Furthermore, the receiving and evaluation device activates or switches on the gyroscope in order to calculate the angle of rotation or opening angle of the door. The angle is calculated by the receiving and evaluation device, for example, by integrating the rotation rate signals received from the gyroscope. The device for detecting a door movement goes into the "pre-alarm" mode.

Within the period of time specified by the timer, the receiving and evaluating device determines in a step S4, using the signals from the gyroscope, the opening angle of the door by which the door is deflected from its closed position. Using the gyroscope, changes in the angle of the door over time are integrated.

The receiving and evaluating device compares the opening angle of the door, for example, with a predetermined threshold value stored in the memory device for the opening angle of the door up to which the door is considered to be closed. If the opening angle of the door is less than or equal to the threshold value for a closed door, the receiving and evaluation device determines in step S4 that the door is closed, ie step S4: No, and there is no successful unauthorized entry to the door by means of a lock pick .

The receiving and evaluating device then repeats step S4, ie the test as to whether the opening angle of the door exceeds the threshold value for the opening angle by means of the signals received from the gyroscope until the time interval specified by the timer has expired. After the period of time specified by the timer has elapsed and the receiving and evaluation device has determined that the door has not been opened, the device for determining an unauthorized entry at a door returns to the “stand-by” mode in step S1.

If the receiving and evaluating device determines in step S4 that the opening angle of the door exceeds the threshold value for the opening angle, the receiving and evaluating device determines that the door has been opened and that there is a successful unauthorized entry through the door, ie step S4 : Yes.

Next, the system state of the door movement detection device changes to the "intrusion detected" mode.

In step S5 , the receiving and evaluating device generates an alarm signal and transmits this to an alarm device for outputting an optical and / or acoustic warning signal and / or the receiving and evaluating device sends the alarm signal to at least one external electronic device, e.g. a cell phone, by means of a transmitting device , a smartphone, a WLAN router, a server, a fax machine, a PC, a laptop, a tablet PC, etc. of the owner of the door from a room to be protected from unauthorized entry, the police or a security service. On the basis of the information in the alarm signal, such as the event of unauthorized entry, time of unauthorized entry and / or position or location of the room which is closed by the door, etc., the recipient can take appropriate countermeasures, such as sending the police to the through the door of the room to be protected.

The method and the device for detecting a door movement have the advantage that if nothing happens to the door, ie if the door is left alone, the sensors and the microcontroller are kept in a low-energy mode in order to extend the battery life as much as possible extend.

As soon as a force is exerted on the door in at least one spatial axis and exceeds a threshold value, this is detected by the acceleration sensor and reported to the microcontroller. The microcontroller then activates the MEMS acceleration sensor to detect the movement or acceleration of the door in all three spatial axes as a function of time. The microcontroller then evaluates the signals from all three spatial axes, which it receives from the MEMS acceleration sensor, and determines whether there is an event of authorized or unauthorized entry at the door. If an unauthorized entry is detected, the microcontroller determines whether the unauthorized entry is successful and the door has been opened.

Since an algorithm according to the invention, as exemplified above with reference to Fig. 4 was described, the situations "door is at rest" from "something happens at the door and represents an authorized or unauthorized intrusion at the door" can differentiate, the algorithm can calibrate shifts and deviations due to temperature and aging of the sensors.

The present invention is also robust against false alarms, since an authorized opening of the door or window can be distinguished from an unauthorized opening by analyzing the acceleration pattern measured on the door and an alarm is only triggered when an unauthorized opening is detected, e.g. by means of a lockpick, was successful, ie the door was actually opened. Similarly, a normal event at the door, such as knocking on the door to let a visitor in or a child driving a toy car against the door, does not result in the algorithm setting the "pre-alarm" state as previously referred to on Fig. 4 was explained.

Although the present invention has been fully described above on the basis of preferred exemplary embodiments, it is not restricted thereto, but rather can be modified in a wide variety of ways.

List of reference symbols

1

first area

2

second area

3

third area

4th

fourth area

5

fifth area

10

Accelerometer

11

gyroscope

12

Receiving and evaluation device

13

Device for determining unauthorized entry into a door

14th

Sending facility

15th

external electronic facility

16

Energy supply device

17th

casing

18th

Alarm device

19th

Storage facility

Claims (14)

1. Method for determining unauthorized intrusion through a door or through another closure of an opening in a wall, referred to as a door below, having the steps of:

   a) determining a movement course of the door on the basis of the time in all three spatial axes by means of a receiving and evaluating device using a motion sensor (10) in an active mode,

   b) determining parameters in all three spatial axes on the basis of the movement course of the door determined using the motion sensor (10) on the basis of the time by means of the receiving and evaluating device (12), wherein the receiving and evaluating device (12) determines that there is unauthorized intrusion at the door if the actual value of the respective parameter is within an associated parameter range for unauthorized intrusion that is stored in a storage device (19),

   c) determining an opening angle of the door by means of the receiving and evaluating device using an angle measuring sensor (11) if unauthorized intrusion has been determined,

   d) comparing the opening angle of the door with a threshold value for the opening angle of the door, up to which the door is considered to be closed, by means of the receiving and evaluating device;

   e) wherein the receiving and evaluating device (12) determines that the door is open when the opening angle exceeds the threshold value for the opening angle of the door, up to which the door is considered to be closed, and wherein the receiving and evaluating device (12) outputs an alarm signal if the door is open.
2. Method according to Claim 1, wherein the angle measuring sensor (11) is switched on or activated by the receiving and evaluating device (12) in order to capture an opening angle of the door when unauthorized intrusion is captured.
3. Method according to Claim 1 or 2, wherein the motion sensor (10) in step a) captures the application of a force to the door in a standby mode and transmits a signal, preferably a binary signal, to the receiving and evaluating device if the force on the door exceeds a threshold value for a minimum force, and wherein the receiving and evaluating device (12) activates the motion sensor (10) in the active mode to capture the movement course of the door in all three spatial axes on the basis of the time.
4. Method according to Claim 3, wherein the receiving and evaluating device (12) activates a timer in step b) if unauthorized intrusion at the door has been determined, and wherein the determination of the opening angle in step c) and the comparison of the opening angle with the threshold value in step d) are repeated until it is either determined in step e) within the predefined period that the door is open or the period predefined by the timer has expired and no opening of the door has been determined in step e), wherein the receiving and evaluating device (12) returns to the standby mode in step a) if the predefined period has expired and no opening of the door has been determined in step e) .
5. Method according to one of the preceding claims, wherein parameter ranges for a plurality of events of unauthorized intrusion are retrievably stored in the storage device (19), and wherein the receiving and evaluating device (12) determines in step b) that there is an event of unauthorized intrusion at the door if the actual value of the respective parameter is within the parameter range for the event of unauthorized intrusion, and wherein the events for unauthorized intrusion at the door are preferably events such as the opening of the door by means of a lock pick, the opening of the door by means of a crowbar, the opening of a window by means of a crowbar in the room closed by means of the door, and/or ramming of the door.
6. Method according to one of Claims 3 to 5, wherein parameter ranges for a plurality of events of authorized intrusion are retrievably stored in the storage device (19), wherein the events for authorized intrusion at the door are preferably events such as knocking on the door, bumping against the door by means of a toy car, bumping against the door by means of a shopping bag and/or opening the door by means of the associated key, and wherein the receiving and evaluating device (12) determines in step b) that there is an event of authorized intrusion at the door if the actual value of the respective parameter is within the parameter range for the event of authorized intrusion, and wherein the receiving and evaluating device (12) returns to step a) in the standby mode.
7. Method according to one of the preceding claims, wherein parameters in at least one of the spatial axes are an amplitude level, a period duration, a duration of a pause between two successive periods, a number of amplitudes which exceed a predetermined amplitude level and/or a duration of the pause between two amplitudes which exceed a predetermined amplitude level.
8. Method according to one of the preceding claims, wherein the alarm signal is transmitted to an alarm device (18) and/or to at least one external electronic device (15), wherein the external electronic device is, in particular, a mobile phone, a smartphone, a server, a WLAN router, a PC, a tablet PC, a laptop or a fax.
9. Method according to one of the preceding claims, wherein the motion sensor is an acceleration sensor (10) and the angle measuring sensor is a gyroscope (11) .
10. Apparatus for determining unauthorized intrusion through a door or through another closure of an opening in a wall, referred to as a door below, having:

    a motion sensor (10) for determining a movement course of the door on the basis of the time in all three spatial axes,

    an angle measuring sensor (11) for determining an opening angle of the door,

    a storage device (19) which stores parameter ranges for parameters in all three spatial axes for unauthorized intrusion at the door and at least one threshold value for the opening angle of the door, up to which the door is considered to be closed,

    and

    a receiving and evaluating device (12) for determining the actual values of the parameters on the basis of the movement course of the door determined using the motion sensor (10) on the basis of the time, wherein the receiving and evaluating device (12) determines unauthorized intrusion at the door if the actual value of the respective parameter is within the associated parameter range stored in the storage device (19), wherein the receiving and evaluating device (12) determines the opening angle of the door using the angle measuring sensor (11) if unauthorized intrusion at the door has been determined, and wherein the receiving and evaluating device (12) outputs an alarm signal if the opening angle of the door determined using the angle measuring sensor (11) exceeds the threshold value for the opening angle of the door, up to which the door is considered to be closed.
11. Apparatus according to Claim 10, wherein the apparatus (13) has an alarm device (18) or can be coupled to the latter and transmits the alarm signal to the alarm device (18) in order to generate a warning signal, in particular an optical and/or acoustic warning signal.
12. Apparatus according to Claim 10 or 11, wherein the apparatus (13) has a transmitting device (14) for transmitting the alarm signal to at least one external electronic device (15), in particular a mobile phone, a smartphone, a server, a WLAN router, a PC, a tablet PC, a laptop or a fax.
13. Apparatus according to one of Claims 10 to 12, wherein the apparatus (13) has an energy supply device (16) for supplying the motion sensor (10), the angle measuring sensor (11), the alarm device (18) and/or the transmitting device (14) with energy, wherein the energy supply device (16) is preferably at least one battery and/or a rechargeable battery.
14. Apparatus according to one of Claims 10 to 13, wherein the motion sensor is an acceleration sensor (10) and the angle measuring sensor is a gyroscope (11) .

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