ACCESS SYSTEM FOR A VEHICLE, METHOD FOR AN ACCESS SYSTEM, COMPUTER PROGRAM PRODUCT AND COMPUTER-READABLE MEDIUM

Description

[0001] The present invention relates to an access system for a vehicle, a method for an access system, a computer program product and a computer-readable medium.

[0002] Such access systems for vehicles, processes, computer program products and computer-readable media are already known in numerous versions from the prior art.

[0003] Furthermore, a method for defending against relay attacks is known, for example, from US 2016 / 0140539 A1, in which the movement of a mobile device is detected and evaluated using two motion sensors. The movement of the mobile device is determined first by the device itself and second by a motion sensor separate from the mobile device. If the movement detected by the mobile device and the separate motion sensor is substantially the same, it is concluded that no relay attack is occurring. The method known from US 2016 / 0140539 A1 is intended for use in payment systems or similar applications. The customer of such a payment system is prompted to perform a specific movement with the mobile device, which is then detected and evaluated by the two motion sensors in the manner described above.

[0004] Furthermore, an access control system is known from DE 101 05 060 A1, comprising a control unit and a transponder communicating with the control unit and having a first motion sensor, wherein the control unit is connected to a further motion sensor that detects the movement of a person carrying the transponder, and wherein the communication between the transponder and the control unit regarding the person's access authorization is only enabled if a comparison of the movement patterns supplied by the two motion sensors in the control unit reveals a match in essential characteristics.

[0005] Something similar is also known from EP 3 335 942 A1, DE 10 2015 109 468 A1 and EP 2 806 406 A2.

[0006] Furthermore, DE 198 50 176 C1 discloses an anti-theft device for a motor vehicle in which a physical quantity is measured on a portable code transmitter and its value, together with code information, is transmitted to a control unit in the motor vehicle. The same physical quantity is measured in the motor vehicle. If both the values ​​of the measured quantities and the code information contained in the code signal match a target code information for the vehicle, the security devices in the motor vehicle are activated.

[0007] Finally, US patent 2018 232 971 A1 discloses a vehicle access control system that also includes a vehicle-based identification unit and a mobile access device, each featuring an environmental sensor for detecting environmental data. The identification unit then verifies whether the environmental data detected by the mobile access device matches that detected by the vehicle-based sensors.

[0008] This is where the present invention comes in.

[0009] The present invention is based on the objective of improving security when accessing a vehicle.

[0010] This problem is solved by an access system for a vehicle with the features of claim 1, a method for an access system of a vehicle with the features of claim 5, a computer program product with the features of claim 13, and a computer-readable medium with the features of claim 14. The dependent claims relate to advantageous embodiments of the invention.

[0011] A significant advantage of the invention lies particularly in the improved security of access to a vehicle, for example, a motor vehicle such as a passenger car or the like. By sensing and evaluating a single movement sequence of a person moving outside the vehicle and carrying a portable motion sensor, both by this portable motion sensor and by a vehicle-mounted motion sensor, the security of a vehicle access system is substantially enhanced. The phrase "single movement sequence" means that the same movement sequence of the person can be detected by both the at least one vehicle-mounted motion sensor and the at least one portable motion sensor. If the detected movements are essentially identical, they refer to the same person.Otherwise, the individuals in question are different people moving within the vehicle's vicinity. Since, according to the invention, the vehicle-mounted motion sensor and the portable motion sensor are designed and configured such that the sensing of the person's movement by the vehicle-mounted motion sensor depends on a prior identification of that person by the portable motion sensor, it is ensured that the movement detected by the vehicle-mounted motion sensor and the movement detected by the portable motion sensor relate to the movement of the same person.

[0012] Accordingly, the method according to the invention provides that the sensing of the movement sequence of the person by means of the vehicle-mounted motion sensor takes place depending on a temporally prior identification of this person by means of the portable motion sensor.

[0013] Unlike US 2016 / 0140539 A1, which is unrelated to this invention, the invention does not sense and compare the movement of the mobile device, i.e., the portable motion sensor, but rather the movement of the person carrying the portable motion sensor. This simplifies the sensing of the movement and allows for the use of a variety of suitable motion sensor types, particularly with regard to vehicle-mounted motion sensors. For example, it is easier to use a sensor already installed in the vehicle for other purposes as a vehicle-mounted motion sensor. Furthermore, the security of the access system is also improved because it is not the movement of a mobile device that is sensed and evaluated, but rather the movement of the person whose access authorization is ultimately at stake.In addition to the automatic unlocking of at least one vehicle door, it is also conceivable that the automatic locking of at least one vehicle door could occur. For example, this could be the case if the system automatically detects, based on the person's movement, that they are exiting or moving away from the vehicle.

[0014] The term "vehicle" is to be understood generally and includes all types of land, sea, and air vehicles. The term "access control unit" is also to be interpreted broadly and includes not only access control units that enable at least one door of the vehicle to be automatically locked or unlocked, but also access control units that additionally monitor the vehicle's activation. For example, the activation of the vehicle may be monitored based on additional conditions. The term "door" includes all types of doors, covers, or hatches of the vehicle.

[0015] Furthermore, in the access system according to the invention, the vehicle-mounted motion sensor and the portable motion sensor are designed and configured such that they detect the person's movements independently of each other. This improves safety when accessing the vehicle.

[0016] The same applies to the method according to the invention, in which the vehicle-mounted motion sensor and the portable motion sensor sensing the movement sequence of the person independently of each other.

[0017] In principle, the type, function, dimensions, material, arrangement, and number of vehicle-mounted motion sensors can be freely selected within broad, suitable limits. Advantageously, the at least one vehicle-mounted motion sensor is designed as a camera, radar, lidar, and / or a time-of-flight (TOF) sensor. The camera could, for example, be an optical camera operating in the wavelength range of visible light. The abbreviation "TOF" stands for "time of flight" and refers to the time-of-flight measurement of a signal emitted by a sensor that is reflected by an object and returns to the sensor. It is also conceivable that the at least one vehicle-mounted motion sensor could be used for other vehicle functions, such as parking assistance, emergency braking assistance, or similar systems.For example, several vehicle-mounted sensors with different operating principles can be combined to form vehicle-mounted motion sensors. It would also be possible, for instance, to use multiple vehicle-mounted sensors, each monitoring a section of the vehicle's surroundings, for a comprehensive monitoring of that environment.

[0018] The at least one portable motion sensor can also be freely selected within wide suitable limits with regard to type, function, dimensions, material, arrangement, and number. An advantageous embodiment of the access system according to the invention provides that the at least one portable motion sensor is configured as a UID, a smartphone, a wearable device, a three-axis magnetometer, a three-axis accelerometer, and / or a three-axis gyroscope. This makes the portable motion sensor particularly easy to implement. The abbreviation "UID" stands for "user identification device" and refers to a user identification device, for example, a key fob. Furthermore, it is possible to use the portable motion sensor for other purposes as well. The at least one portable motion sensor thus has at least one of the aforementioned configurations or any number and combination of these configurations.

[0019] A particularly advantageous embodiment of the access system according to the invention provides that at least one of the at least one vehicle-mounted motion sensor and / or the at least one portable motion sensor is designed and configured to detect at least one physical characteristic of the person, and that the access control unit can be controlled by the controller based on the detected physical characteristic in such a way that the access control unit locks or unlocks the at least one door. In this way, the security of access to the vehicle is further improved. For example, it is possible for the vehicle-mounted motion sensor to detect and evaluate the height of the person wearing the portable motion sensor.Alternatively or additionally, the movement patterns of the person wearing the portable motion sensor could be analyzed to identify a specific person or group of people, for example, based on their gait. This would effectively prevent unauthorized access to the vehicle, such as the unintentional unlocking of at least one door, for example, by a small child or an animal. Furthermore, analyzing the movement patterns of the person wearing the portable motion sensor could also be used to deny access to the vehicle to an intoxicated person.

[0020] Accordingly, an advantageous further development of the method according to the invention provides that at least one of the at least one vehicle-mounted motion sensor and / or the at least one portable motion sensor is designed and configured to determine at least one physical feature of the person, and that the control system controls the access control unit depending on the determined physical feature in such a way that the access control unit locks or unlocks the at least one door.

[0021] A particularly advantageous embodiment of the method according to the invention provides that the comparison in the control system is triggered depending on the essentially simultaneous detection of a person's movement sequence by the vehicle-mounted motion sensor and the portable motion sensor. This ensures that the comparison, and thus a corresponding automatic locking or unlocking of the at least one door of the vehicle, only occurs when the same person's movement sequence is detected by both the vehicle-mounted motion sensor and the portable motion sensor. The phrase "essentially simultaneous" means that, according to the invention, simultaneity within certain predefined tolerances is also to be understood as simultaneity.

[0022] A further advantageous embodiment of the method according to the invention provides that the portable motion sensor determines its position relative to the person, and this position is then evaluated to detect the person's movement using the portable motion sensor and / or the vehicle-mounted motion sensor. In this way, the quality of the detection of the person's movement using the portable motion sensor and / or the vehicle-mounted motion sensor can be improved without additional sensors. For example, it is conceivable that a vehicle-mounted motion sensor designed as a camera could detect the person's movement, in particular an area in which the portable motion sensor is positioned on the person.It is possible, for example, that the images captured in this area could be subjected to further, i.e., more detailed, analysis. The position of the wearable motion sensor relative to the person always refers to the motion sensor worn by that person.

[0023] In principle, the determination of the position of the portable motion sensor relative to the person can be freely selected within wide suitable limits, both in terms of type and function. An advantageous further development of the aforementioned embodiment of the method according to the invention provides that the position of the portable motion sensor relative to the person is determined by measuring the duration of each step taken by the person along all three spatial axes, wherein the Z-axis runs essentially parallel to a vertical axis of the person, and the X-axis and the Y-axis are perpendicular to each other and to the person's vertical axis. This further improves the accuracy of the determination of the portable motion sensor's position relative to the person in a simple manner.The step duration refers to the time taken by a person wearing a portable motion sensor, i.e., the time between that person's foot leaving the ground and its subsequent placement on the ground. The step duration can be determined, for example, by integrating the acceleration values ​​measured along the relevant spatial axis (X-axis, Y-axis, or Z-axis) using a portable motion sensor configured as an accelerometer.

[0024] An advantageous further development of the latter embodiment of the method according to the invention provides that, if the person's step duration along the Z-axis is n and simultaneously their step duration along the X-axis or the Y-axis is approximately 0.5*n, the position of the wearable motion sensor relative to the person is identified as a jacket pocket, a shirt pocket, or the person's hand. In this way, determining the position of the wearable motion sensor in the person's jacket pocket, shirt pocket, or hand is made simple.

[0025] The same applies to a further advantageous embodiment of the inventive method according to claim 9, wherein, if the person's step duration along the Z-axis is n and simultaneously the person's step duration along the X-axis or the Y-axis is approximately zero, the position of the portable motion sensor relative to the person is identified as a container carried by the person or the person's hand. The container can, for example, be a briefcase, a shopping bag, a handbag, or the like.

[0026] This also applies analogously to another advantageous embodiment of the inventive method according to claim 9, whereby, if the person's step duration along the Z-axis is n and simultaneously the person's step duration along the X-axis or the Y-axis is approximately n, the position of the portable motion sensor relative to the person is identified as a trouser pocket or a skirt pocket of the person.

[0027] The invention is explained in more detail below with reference to the attached, roughly schematic drawing. The single figure shows: Fig. 1 shows an embodiment of an access system according to the invention for a vehicle.

[0028] In Fig. 1 Figure 1 shows an exemplary embodiment of an access system according to the invention for a vehicle 2. The vehicle 2 is designed as a passenger car. The access system comprises a vehicle-mounted motion sensor 4 designed as an optical camera, wherein the optical camera 4 operates in the wavelength range of visible light. The camera 4 is arranged on the vehicle 2 and is connected to a control unit 6 of the vehicle 2 in a manner known to those skilled in the art. For example, the signal transmission connection can be wired or wireless. The control unit 6 is further connected to an access control unit 8 of the vehicle 2 and is designed and configured to control the access control unit 8 such that the access control unit 8 automatically locks or unlocks all doors 10 of the vehicle 2.The doors (number 10) are designed as a driver's door, passenger door, two rear doors and a tailgate.

[0029] Furthermore, the access system includes a portable motion sensor 12, which in the present embodiment is designed as a three-axis accelerometer from a smartphone. The smartphone, and thus the three-axis accelerometer 12 of the smartphone, is connected to the control unit 6 of the vehicle 2 in a manner known to those skilled in the art, for example wirelessly, via signal transmission.

[0030] According to the invention, the at least one vehicle-mounted motion sensor 4 and the at least one portable motion sensor 12 are designed and configured such that the detection of a person's movement by the at least one vehicle-mounted motion sensor 4 is contingent upon the prior identification of that person by the at least one portable motion sensor 12. This ensures that the movement of the person 14 detected by the at least one vehicle-mounted motion sensor 4 and the movement of the person 14 detected by the at least one portable motion sensor 12 relate to the movement of the same person 14.

[0031] The functioning of the access system according to the invention and the method according to the present embodiment are described with reference to the Fig. 1 explained in more detail below.

[0032] Person 14 carries the portable motion sensor 12, i.e., the smartphone, in their jacket pocket and moves towards the vehicle 2. The portable motion sensor 12, namely the smartphone's three-axis accelerometer, detects the movement of person 14 towards the vehicle 2. Simultaneously, the same movement of person 14 is detected by the vehicle-integrated motion sensor 4, namely the vehicle 2's camera. For example, it can be provided that the portable motion sensor 12 activates the vehicle-integrated motion sensor 4 when it approaches the vehicle 2. In the present embodiment, the vehicle-integrated motion sensor 4 and the portable motion sensor 12 are designed and configured such that they detect person 14's movement independently of each other.

[0033] Due to the simultaneous detection of the movement sequence of person 14 as they approach vehicle 2 by the vehicle-mounted motion sensor 4 and the portable motion sensor 12, a comparison of the movement sequence of person 14 detected by the portable motion sensor 12 with the movement sequence of person 14 detected by the vehicle-mounted motion sensor 4 is automatically triggered, i.e., started. Since the movement sequence of person 14 detected by the portable motion sensor 12 essentially corresponds to the movement sequence of person 14 detected by the vehicle-mounted motion sensor 4 as they approach vehicle 2, the access control unit 8 of vehicle 2 is controlled by the controller 6 such that the access control unit 8 automatically unlocks the doors 10 of vehicle 2 in a manner known to those skilled in the art.However, it is also conceivable that access to the vehicle 2, and thus the unlocking of the doors 10 of the vehicle 2, depends on further conditions. For example, it is possible that the access requirements according to the invention are combined with other access requirements known from the prior art. This can be implemented in a particularly simple way by designing the portable motion sensor as a UID, i.e., as a user identification device, for example, a radio key.

[0034] The evaluation of the two motion sequences in the controller 6 is carried out in a manner known to those skilled in the art. Accordingly, the two motion sequences are synchronized in time in the controller 6 and transferred to a common coordinate system.

[0035] If the movement sequence of person 14, sensed by the portable motion sensor 12, had not matched the movement sequence of person 14, sensed by the vehicle-mounted motion sensor 4, as they approached the vehicle 2 within a previously defined tolerance range stored in the control unit 6, then the control unit 6 would not have controlled the access control unit 8 of the vehicle 2 in the manner described above.

[0036] Person 14 enters vehicle 2 and drives off. For example, it may be provided that person 14 only needs to press a button or the like to start vehicle 2. Alternatively, another embodiment of the invention may provide that starting the vehicle is possible, for example, depending on the evaluation of output signals from an interior camera or the like, in order to implement additional security against unauthorized starting.

[0037] When person 14 leaves vehicle 2, the portable motion sensor 12, namely the three-axis accelerometer of the smartphone, detects the movement sequence of person 14 when exiting vehicle 2 and / or when closing the door 10 of vehicle 2 and / or when moving away from vehicle 2. At the same time, the same movement sequence of person 14 is detected by means of the vehicle-integrated motion sensor 4, namely the camera of vehicle 2.Due to the simultaneous sensing of the movement sequence of person 14 when exiting vehicle 2 and / or when closing the door 10 of vehicle 2 and / or when moving away from vehicle 2 by means of the vehicle-bound motion sensor 4 and the portable motion sensor 12, the comparison of the movement sequence of person 14 sensed by the portable motion sensor 12 with the movement sequence of person 14 sensed by the vehicle-bound motion sensor 4 is automatically triggered again, i.e. started.Since the movement sequence of person 14, sensed by the portable motion sensor 12, essentially corresponds to the movement sequence of person 14, sensed by the vehicle-mounted motion sensor 4, when exiting the vehicle 2 and / or when closing the door 10 of the vehicle 2 and / or when moving away from the vehicle 2, the access control unit 8 of the vehicle 2 is controlled by the control unit 6 in such a way that the access control unit 8 automatically locks the doors 10 of the vehicle 2 in a manner known to those skilled in the art.

[0038] To improve security when accessing the vehicle, the described method according to the invention provides that the detection of the movement sequence of person 14 by means of the at least one vehicle-mounted motion sensor 4 is dependent on a prior identification of this person 14 by means of the at least one portable motion sensor 12. As already explained above, this ensures that the movement sequence of person 14 detected by the at least one vehicle-mounted motion sensor 4 and the movement sequence of person 14 detected by the at least one portable motion sensor 12 refer to the movement sequence of the same person 14.

[0039] Furthermore, the invention relates to a computer program product comprising instructions that cause the access system according to the present embodiment to execute the process steps of the method according to the present embodiment, and a computer-readable medium on which the computer program product is stored.

[0040] The invention is not limited to the present embodiment. For example, the invention can be advantageously used in a variety of different vehicles, such as land, water, or air vehicles. Furthermore, the at least one portable motion sensor and the at least one vehicle-mounted motion sensor can be freely selected within wide suitable limits. For example, the at least one vehicle-mounted motion sensor can be configured as a different type of camera, a radar, a lidar, and / or a time-of-flight (TOF) sensor. Combinations of the aforementioned motion sensors are also possible. The same applies to the at least one portable motion sensor, which can, for example, also be configured as a UID, a wearable device, and / or a three-axis magnetometer, a three-axis accelerometer, and / or a three-axis gyroscope.The motion sensors used in this context are not limited to accelerometers.

[0041] It is also conceivable that at least one of the at least one vehicle-mounted motion sensor and / or the at least one portable motion sensor is designed and configured to detect at least one physical characteristic of the person, and that the access control unit can be controlled by the controller based on the detected physical characteristic in such a way that the access control unit locks or unlocks the at least one door. For example, it is possible that the height of the person wearing the at least one portable motion sensor can be detected and evaluated using the at least one vehicle-mounted motion sensor. In another embodiment, an analysis of the movement pattern of the person wearing the portable motion sensor could be performed alternatively or additionally, in order to identify a specific person or group of people, for example, based on a person's gait pattern.Accordingly, unauthorized access to the vehicle, i.e., the unintentional unlocking of at least one of the vehicle's doors, for example by a small child or an animal, could be effectively prevented. By analyzing the movement patterns of the person wearing the portable motion sensor, access to the vehicle could also be denied to an intoxicated person, for instance. Alternatively or additionally, the identification of at least one physical characteristic of the person using the at least one portable motion sensor is conceivable. The signal transmission link of the at least one portable motion sensor and / or the at least one vehicle-mounted motion sensor can be further protected by encryption or similar means.

[0042] Furthermore, it is possible to determine the position of the portable motion sensor relative to the person using this position. This position is then used to sensing the person's movement using the portable motion sensor and / or the vehicle-mounted motion sensor. In this way, the quality of the movement sensing can be improved without additional sensors. For example, a vehicle-mounted motion sensor, designed as a camera, could capture the area where the portable motion sensor is positioned on the person. The images captured in this area could then be used for further, more detailed analysis.In principle, the method for determining the position of the wearable motion sensor relative to the person can be freely chosen within broad, suitable limits, both in terms of type and function. For example, the position of the wearable motion sensor relative to the person can be determined by measuring the person's step duration along all three spatial axes, where the Z-axis runs essentially parallel to the person's vertical axis, and the X-axis and Y-axis are perpendicular to each other and to the person's vertical axis. This further improves the accuracy of determining the wearable motion sensor's position relative to the person in a simple way.

[0043] An advantageous further development of the latter embodiment provides that, if the person's step duration along the Z-axis is n and simultaneously their step duration along the X-axis or Y-axis is approximately 0.5*n, the position of the wearable motion sensor relative to the person is identified as a jacket pocket, a shirt pocket, or the person's hand. In this way, determining the position of the wearable motion sensor in the person's jacket pocket, shirt pocket, or hand is made simple.

[0044] The same applies to a further advantageous embodiment of the inventive method according to claim 9, wherein, if the person's step duration along the Z-axis is n and simultaneously the person's step duration along the X-axis or the Y-axis is approximately zero, the position of the portable motion sensor relative to the person is identified as a container carried by the person in the hand or a hand of the person.

[0045] This also applies analogously to another advantageous embodiment of the inventive method according to claim 9, whereby, if the person's step duration along the Z-axis is n and simultaneously the person's step duration along the X-axis or the Y-axis is approximately n, the position of the portable motion sensor relative to the person is identified as a trouser pocket or a skirt pocket of the person. Reference symbol list

[0046] 2 Vehicle 4 Vehicle-mounted motion sensor, configured as a camera 6 Vehicle control unit 2 8 Vehicle access control unit 2 10 Vehicle door 2 12 Portable motion sensor 14 Person carrying the portable motion sensor 12

Claims

1. Access system for a vehicle (2), comprising at least one vehicle-bound motion sensor (4) and at least one motion sensor (12) wearable by a person (14), each for sensing a single motion sequence of the person (14) moving outside the vehicle (2) and wearing the wearable motion sensor (12), wherein the vehicle-bound motion sensor (4) and the wearable motion sensor (12) are designed and set up in such a way that the vehicle-bound motion sensor (4) and the wearable motion sensor (12) sense the motion sequence of the person (14) independently of each other, an access control unit (8) of the vehicle (2) for locking and / or unlocking at least one door (10) of the vehicle (2) and a controller (6) for comparing the motion sequence of the person (14) sensed by means of the vehicle-bound motion sensor (4) with the motion sequence of the person (14) sensed by means of the wearable motion sensor (12), wherein the access control unit (8) can be actuated by means of the controller (6) on the basis of the comparison of the two motion sequences in such a way that the access control unit (8) automatically locks or automatically unlocks the at least one door (10), characterised in that the vehicle-bound motion sensor and the wearable motion sensor are designed and set up in such a way that the sensing of the motion sequence of the person by means of the vehicle-bound motion sensor takes place depending on a temporally prior identification of this person by means of the wearable motion sensor.

2. Access system according to claim 1, characterised in that the at least one vehicle-bound motion sensor (4) is designed as a camera, a radar, a lidar and / or a TOF sensor.

3. Access system according to claim 1 or 2, characterised in that the at least one wearable motion sensor (12) is designed as a UID, a smartphone, a wearable, a three-axis magnetometer, a three-axis acceleration sensor and / or a three-axis gyroscope.

4. Access system according to any one of claims 1 to 3, characterised in that at least one of the at least one vehicle-bound motion sensor and / or the at least one wearable motion sensor is / are designed and set up to determine at least one physical characteristic of the person, and in that the access control unit can be actuated by means of the controller depending on the determined physical characteristic in such a way that the access control unit locks or unlocks the at least one door.

5. Method for an access system of a vehicle (2), comprising the following method steps: - Sensing of a motion sequence of a person (14) wearing a wearable motion sensor (12) moving outside the vehicle (2) by means of this wearable motion sensor (12); - Sensing of this motion sequence of the person (14) by means of a vehicle-bound motion sensor (4), wherein the vehicle-bound motion sensor (4) and the wearable motion sensor (12) sense the motion sequence of the person (14) independently of one another; - Comparison of the motion sequence of the person (14) sensed by means of the vehicle-bound motion sensor (4) with the motion sequence of the person (14) sensed by means of the wearable motion sensor (12) in a controller (6), and - Actuation of an access control unit (8) of the vehicle (2) by means of the controller (6) on the basis of the comparison, such that the access control unit (8) automatically locks or automatically unlocks at least one door (10) of the vehicle (2), - characterised in that the sensing of the person's motion sequence by means of the vehicle-bound motion sensor takes place depending on a temporally prior identification of this person by means of the wearable motion sensor.

6. Method according to claim 5, characterised in that the comparison in the controller (6) is triggered depending on the essentially simultaneous sensing of a motion sequence of the person (14) by means of the vehicle-bound motion sensor (4) and the wearable motion sensor (12).

7. Method according to claim 5 or 6, characterised in that at least one of the at least one vehicle-bound motion sensor and / or the at least one wearable motion sensor is / are designed and set up to determine at least one physical characteristic of the person, and in that the controller actuates the access control unit depending on the determined physical characteristic in such a way that the access control unit locks or unlocks the at least one door.

8. Method according to any one of claims 5 to 7, characterised in that a position of the wearable motion sensor relative to the person is determined by means of the wearable motion sensor, wherein this position of the wearable motion sensor is evaluated for sensing the motion sequence of the person by means of the wearable motion sensor and / or by means of the vehicle-bound motion sensor.

9. Method according to claim 8, characterised in that the position of the wearable motion sensor relative to the person is determined by means of a determination of a step duration of the person along all three spatial axes, wherein the Z-axis runs essentially parallel to a vertical axis of the person and the X-axis and the Y-axis run perpendicular to each other and to the vertical axis of the person.

10. Method according to claim 9, characterised in that with a step duration of the person along the Z-axis of n and simultaneously a step duration of the person along the X-axis or the Y-axis of about 0.5*n, the position of the wearable motion sensor relative to the person is identified as a jacket pocket or a shirt pocket or a hand of the person.

11. Method according to claim 9, characterised in that with a step duration of the person along the Z-axis of n and simultaneously a step duration of the person along the X-axis or the Y-axis of approximately zero, the position of the wearable motion sensor relative to the person is identified as a container carried by the person by hand or a hand of the person.

12. Method according to claim 9, characterised in that with a step duration of the person along the Z-axis of n and simultaneously a step duration of the person along the X-axis or the Y-axis of approximately n, the position of the wearable motion sensor relative to the person is identified as a trouser pocket or a skirt pocket of the person.

13. Computer program product comprising instructions that cause the access system according to any one of claims 1 to 4 to perform the method steps of the method according to any one of claims 5 to 12.

14. Computer-readable medium on which the computer program product according to claim 13 is stored.