EP3928296A1

EP3928296A1 - Safety system for a vehicle

Info

Publication number: EP3928296A1
Application number: EP20706452.8A
Authority: EP
Inventors: Mirko Schindler
Original assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Current assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Priority date: 2019-02-19
Filing date: 2020-02-19
Publication date: 2021-12-29
Also published as: WO2020169654A1; DE102019104098A1

Abstract

The invention relates to a safety system (1) for a vehicle (2), for activating a safety-relevant function in the vehicle (2), comprising: - a communication assembly (10) for providing wireless communication with a mobile identification transmitter (200) within a safety zone (100) in order to provide the communication in a manner limited by a spatial extent of the safety zone (100) around the vehicle (2) for activating the safety-relevant function, - an adaptation device (20) for adjusting the safety zone (100) in order to adapt the extent of the safety zone (100) variably, in particular according to an automatic adaptation determination.

Description

Security system for a vehicle

Description

The present invention relates to a safety system for a vehicle for activating a safety-relevant function in the vehicle according to the independent system claim. The invention also relates to a method according to the independent method claim.

Various variants of access systems are known from the prior art, which z. B. differentiate with regard to the communication technology or range used or the communication signals used. In principle, such access systems require communication with an identification transmitter of a user in order to be able to determine whether the user is authorized to access the vehicle. To do this, it is common practice to initiate an authentication process. So-called passive access systems enable this in a particularly convenient way

Initiate authentication process without prior manual actuation of the ID transmitter. In addition, such access systems can have a "Keyless Go"

Have functionality, in combination with the passive access, also called "Passive Entry Passive Start" (PEPS for short). When the authenticated identification transmitter is localized within the vehicle, the engine start can then be initiated without operating the key or using it manually on the vehicle. To do this enable, a wake-up signal is often sent out in order to trigger the identification transmitter in a certain area around the vehicle to carry out the authentication (ie to “wake it up”). After waking up, the ID transmitter can, for. B. send a response signal to the vehicle. In addition, it is known to use an evaluation of the wake-up signal or a further communication signal in order to detect the distance between the identification transmitter and the vehicle. To increase security, it can make sense to only allow authentication if the identification transmitter is located within a certain localization area of the vehicle. The localization can also take place via communication with the identification transmitter, e.g. B. by evaluating the signal strength of a communication signal.

In each of these variants, at least one area around the vehicle is used, e.g. B. the reception range for the wake-up signal or the maximum distance according to the localization area. Each of these areas is statically defined. In practice, this may lead to the fact that in a specific situation the extension of one of these areas is unfavorable. For example, if the localization area is too large, security can be impaired if access to the vehicle is possible without the identification transmitter being sufficiently close to the vehicle. It is also possible that if the reception range for the wake-up signal is too short, the granting of access to the vehicle fails. Furthermore, the static definition of the areas is made more difficult because the environment can influence the communication range.

It is therefore an object of the present invention to at least partially remedy the disadvantages described above. In particular, it is the object of the present invention to provide an improved option for access control and / or also to improve the security of the security system.

The above object is achieved by a security system with the features of the independent system claim and by a method with the features of the independent method claim. Further features and details of the invention emerge from the respective subclaims, the description and the drawings. Features and details that are described in connection with the security system according to the invention naturally also apply in connection with the method according to the invention, and in each case vice versa, so that with regard to the disclosure reference is always or can be made to the individual aspects of the invention.

The object is achieved in particular by a security system for a vehicle which can be used to activate a (in particular security-relevant) function and in particular for access control in the vehicle. The security system can have at least one of the following components:

a (in particular at least partially electronic) communication arrangement for providing wireless communication with a mobile identification transmitter (ID transmitter) within at least one security area in order to provide communication limited by a spatial extension of the security area around the vehicle to activate the (in particular security-relevant) function,

an adaptation device for setting the safety area in order to variably adapt the extent of the safety area, in particular as a function of an automatic adaptation determination.

This has the advantage that greater flexibility is provided in the use of the security area, while security against manipulation can be improved at the same time. Optionally, an automatic adjustment determination can also be used in order to carry out the adjustment on the basis of specified criteria. In this way, for. B. ensure that the desired spatial extent is always provided in different situations. In different situations z. B. different objects in the vicinity of the vehicle affect the security area, z. B. by reflections and absorptions of the radio waves used for communication. It is also conceivable that in certain situations, for. B. to increase security, the security area should be reduced. This, too, can possibly be recognized by the adaptation determination, and a corresponding adaptation of the security area can be carried out. The adaptation determination can also advantageously determine when the safety range is too small to allow reliable activation of the safety-relevant function. In this case, the adaptation determination can trigger an automatic increase in the security area in order to avoid unsuccessful attempts to gain access to the vehicle. According to the invention, an adjustable extent (size, range) of the security area can accordingly be used. The adjustment determination is z. B. as an adaptation method, such as a learning algorithm. Next, the adjustment determination z. B. to measure (calibrate) the environment of the vehicle to determine the influence of the environment on the safety area, and to make the setting for a desired (target) extent of the safety area in order to adapt the (actual) extent to it. The extension concerns z. B. the maximum distance of the safety area to the vehicle. The safety area can deviate from a circular shape (due to the influence of the environment).

The adaptation device can be in signal connection with the communication arrangement in order to generate the safety area in accordance with the setting.

The security system according to the invention can advantageously be designed to be integrated, preferably fastened and / or mounted, in the vehicle. The security system can optionally also be designed as an assembly module, which can be assembled as a component and thus individually manageable. The security system is z. B. designed as a passive access system and / or a passive engine start system to access and / or start the engine without manual operation of the ID transmitter by an automatic authentication of the ID transmitter (e.g. triggered by the approach of the ID Sensor to the vehicle and / or localization of the ID transmitter in the vehicle for engine start or activation of the immobilizer).

The ID transmitter can be at least a mobile radio key (usually also just called ID transmitter), possibly with a mechanical emergency key, or a mobile phone or a portable electronic device (e.g. tablet or notebook), each with the appropriate radio technology or communication interface.

E.g. the security area represents the area in which a wake-up signal from the communication arrangement can be received. The security area can also represent the localization area in which the identification transmitter must be localized so that the activation of the security-relevant function is enabled. This release is z. B. made possible by: The activation of the security-relevant function is prevented despite successful authentication of the ID transmitter if the ID transmitter is located outside the security area, and / or

- The wake-up signal is only sent out when the ID transmitter is located within the security area.

The sending of the alarm signal is z. B. triggered by the fact that the vehicle detects the approach of the ID transmitter and / or an activation action, e.g. B. by means of an activation unit such as an optical or capacitive sensor. The capacitive sensor is arranged in a door handle, for example, and accordingly detects the approach to the door handle and / or a door handle actuation as the activation action by the user. The activation unit can optionally be designed to carry out monitoring only in the safety area in order to only detect the approach of the user within the safety area.

The activation of the safety-relevant function can advantageously include an activation of a locking device, in particular a central locking system, of the vehicle, so that the vehicle is unlocked upon activation. As an alternative or in addition, the function can also include an initiation of an opening movement of the doors and / or a and / or (front or rear) flap (including a sliding side door) and / or the activation of vehicle lighting. The function can also include starting the engine of the vehicle.

The safety area can be provided as the sole radio area for activating the safety-relevant function. It can also be possible that at least two or three radio areas are provided for activating the function around the vehicle. A first radio area can e.g. B. can be used to detect an approach of the user, and only then to activate a second radio area (z. B. by sending the alarm signal). The security area can e.g. B. be the first or second radio area. But the remaining radio area can also be viewed as a further security area, which can also be variably set.

It is also advantageous if the vehicle is designed as a motor vehicle, in particular as a hybrid vehicle or as an electric vehicle, preferably with a High-voltage electrical system and / or an electric motor. It may also be possible for the vehicle to be designed as a fuel cell vehicle and / or passenger vehicle and / or semi-autonomous or autonomous vehicle. Advantageously, the vehicle has the security system according to the invention, which z. B. through communication with the identification transmitter (ID transmitter) enables authentication. Depending on the communication and / or the authentication, at least one function of the vehicle can be activated. If the authentication of the ID transmitter is necessary for this, the function can be the safety-relevant function, such as unlocking the vehicle or enabling an engine start. Thus, the security system can also be designed as a passive access system, which initiates the authentication and / or the activation of the function when the proximity of the ID transmitter to the vehicle is detected without active manual actuation of the ID transmitter. For this purpose, for example, a wake-up signal is repeatedly sent out by the security system, which can be received by the ID transmitter when it approaches, and then triggers the authentication. The function can also relate to activation of vehicle lighting and / or actuation (opening and / or closing) of a flap (e.g. front or rear or side flap or door). E.g. the vehicle lighting is activated automatically when the approach is detected and / or the flap is operated when a gesture by a user is detected.

It is possible that the communication arrangement for the communication has a first communication unit for sending (a wake-up signal) via a communication technology such as HF (high frequency, also includes UHF and / or essentially 433.92 MHz or 315 MHz) or LF (low frequency , e.g. essentially 125 kHz) or Bluetooth or WLAN (Wireless Local Area Network) or cellular radio or UWB (Ultra Broadband). The communication arrangement for the communication can also have a second communication unit for receiving (a response signal) by a communication technology such as HF or LF or Bluetooth or WLAN or cellular radio or UWB. The communication technology of the first communication unit can differ from the communication technology of the second communication unit.

According to a further advantage, it can be provided that the adaptation device is designed to allow the setting of the security range as a setting of a parameter for the communication, in particular a signal strength (indirectly e.g. via the Transmission power) and / or range and / or transmission power, to be carried out in the communication arrangement, in particular to limit the communication by the spatial extent of the security area, preferably by adapting the extent of the security area as a physical limitation of the ability to communicate. This ability to communicate is physical, e.g. B. by the decreasing signal strength at a greater distance from the vehicle, limited. In this way, by setting a corresponding parameter that has a physical influence on the reception range, the safety area can be set very reliably. This parameter can be, for example, a transmission power for the transmission of a communication signal by the communication arrangement. This can also be illustrated as follows: If in the previous example the communication signal is the wake-up signal, this has the consequence that the identification transmitter can only use a sufficient signal strength of the wake-up signal within the security area to receive it or thus trigger the authentication process for the identification transmitter becomes.

It is also conceivable that the adaptation device is designed to carry out the setting of the safety area as a setting for an evaluation of the communication, in particular to limit the communication by the spatial extent of the safety area, preferably by activating the safety-relevant function through the evaluation is prevented if the ID transmitter is located outside the security area. In contrast to the limitation by setting a parameter that physically influences the transmission range, the limitation can also take place through the evaluation when communication is physically possible. This means that the limitation can be carried out independently of external (possibly unknown) influences of the environment on the safety area. Even if the influences lead to an undesired reduction in the reception range during communication, the reception range can be selected to be larger as a precaution without increasing the safety range. The safety area is then limited within the desired framework, for example by the evaluation by means of a distance measurement or the like.

It can optionally be provided that the communication arrangement has at least one UWB interface for providing communication via UWB radio in order to in particular to provide at least one of the following functions through communication:

Sending a wake-up signal to the identification transmitter in order to initiate a transmission of authentication information from the identification transmitter to the vehicle,

Receiving a response signal from the identification transmitter in order to receive the authentication information and to evaluate it in order to activate the security-relevant function based on the evaluation,

Detection of the surroundings of the vehicle in order to carry out the setting of the safety area based on the detection,

Locating the identification transmitter relative to the security area, in particular to prevent the activation of the security-relevant function when the identification transmitter is located outside the security area.

The alarm signal can e.g. B. received by the ID transmitter, and lead to the ID transmitter being awakened from an energy-saving mode. Alternatively or additionally, receiving the wake-up signal from the identification transmitter can lead to the identification transmitter initiating an authentication process by sending a response signal with the authentication information to the vehicle. This authentication information includes e.g. B. a code information which authenticates the ID transmitter for the vehicle. For this purpose, the authentication information is evaluated in particular in order to enable the security-relevant function to be activated if the authentication is successful. If z. B. the activation of the function is requested, a query can be made as to whether there is a positive authentication. In order to ensure a sufficient extent of the safety area, in particular the agreement with a target distance, the surroundings of the vehicle can optionally be recorded, in particular analyzed. In this way, influences of the environment on the actual distance can be determined in order to compensate for them (e.g. by increasing the transmission power). For example, object recognition or the like can be used to analyze the environment.

For example, it can be provided that a localization arrangement is provided in order to provide localization of the identification transmitter, the localization arrangement in particular having a localization unit in order to locate a To carry out a time-of-flight evaluation and / or an evaluation of a signal strength of a communication signal of the communication. By means of the evaluation, the distance to the ID transmitter can be recorded on the basis of the communication, in particular when this communication includes a response from the ID transmitter to the communication arrangement. Specifically, a UWB interface of the communication arrangement can also be used for localization in order to carry out the localization as a UWB distance measurement. The localization can e.g. B. can only be carried out if the ID transmitter was previously detected in the security area (e.g. by receiving a response signal by the communication arrangement in response to receiving a wake-up signal by the ID transmitter, if the wake-up signal can only be received in the security area is). The localization can also be used, if necessary, to determine that the ID transmitter is located within the safety area (e.g. by measuring the distance based on the response signal). An evaluation of the length of time between the transmission of the wake-up signal and the reception of the response signal can also enable a time-of-flight (loud time measurement) analysis. Alternatively, the distance can be measured on the basis of the signal strength of the response signal. It may be possible for a plausibility check of the distance to take place after this distance measurement, e.g. B. by means of the UWB distance measurement.

It is also conceivable that the adaptation device is in signal connection with the communication arrangement in order to generate the security area in accordance with the setting, preferably by adapting the communication. For this purpose, for example, a parameter, such as a transmission power, is adapted to the communication arrangement on the basis of the setting. This has the advantage that the security area can be variably defined in a simple and easily controllable manner.

According to a further possibility, it can be provided that the adaptation device is designed to carry out an automatic adaptation determination in order to (automatically) detect influences in the surroundings of the vehicle on the safety area and, in particular, to set the safety area to compensate for these influences based thereon. For this purpose, the automatic adaptation determination includes, for example, an image acquisition of the surroundings, e.g. B. by means of a camera, an optical measuring device or the like. In particular, objects in the environment can be analyzed which (in the spectral range of communication) have one can have a significant influence on the signal propagation of the communication signal. For this purpose, z. B. also a received signal and / or a reflection signal of the communication can be evaluated, the latter being received as a reflection of a transmitted communication signal.

It is also optionally conceivable that the adaptation device has a memory device in order to store (in particular automatically) recorded influences in the surroundings of the vehicle on the security area in a non-volatile manner, the communication arrangement preferably being in signal connection with the adaptation device in order to, based on the stored influences that provide communication. The adjustment device can for this purpose. B. read out the influences from the storage device, evaluate them and adapt the communication based on them. This makes it possible to use a recording of the influences that has already been carried out for the setting in a permanent and thus energy-saving manner.

Furthermore, it can be provided that the adaptation device is designed to carry out an automatic adaptation determination in the form of a learning algorithm in order to set the safety range. In particular, it can be provided in the learning algorithm that historical results of the adaptation determination are taken into account. E.g. In this way, a behavior of the user of the vehicle can be taken into account. The historical results include e.g. B. also historical events in the access control, such as an unsuccessful activation action to activate the function, or a failed authentication. Furthermore, it is conceivable that, as an alternative or in addition to the use of historical results, manual inputs such as feedback from the user are also taken into account. The manual entries and / or the historical results can be used to determine whether the current extent of the security area is sufficient and whether other settings would be more useful in certain situations / environments. For this purpose, these inputs and / or the historical results can also be processed with further environment variables (or also: environment parameters) if necessary.

A further advantage can be achieved within the scope of the invention if the communication arrangement is designed to include the security area as one To generate the authentication area in which the authentication of the ID transmitter is preferably possible, and in particular to initiate an authentication process for activating the security-relevant function through the communication in the authentication area. Alternatively or additionally, the adaptation device can be designed to:

to determine repetition information which is specific for an unsuccessful activation action to activate the safety-relevant function, which in particular precedes a repeated, successful activation action to activate the safety-relevant function,

to determine the adaptation, to increase the extent of the safety area as a function of the repeated information in the case of the unsuccessful activation action, and otherwise to reduce it repeatedly.

In other words, it can first be determined when the activation action (such as a gesture and / or approaching the vehicle, in particular a bumper to activate the function as a flap opening, and / or touching and / or pressing a door handle to activate the function as an unlocking of the vehicle) is unsuccessful, i.e. does not lead to activation of the function. This may be due to the fact that the ID transmitter could not be authenticated beforehand. This depends e.g. B. together with the fact that the communication took place too late or the wake-up signal was sent out if the security area is too small. In order to ensure that the extension of the security area is actually the cause of the unsuccessful activation action, a plausibility check can be carried out. For this purpose z. B. evaluated whether a successful activation action follows within a predetermined period of time (retry). If this is the case, this can be indicated by the repetition information. The repetition information then leads to the safety area being successively increased, e.g. B. by 10 cm. However, in order not to impair the security in return by an excessively large security area, a successful activation action can lead to a reduction in the security area, e.g. B. successively by 10 cm for each repetition attempt. In this case, the security area advantageously defines the area in which e.g. B. the transmission range of the communication arrangement for communication (z. B. for sending the wake-up signal) is sufficient so that the ID transmitter can carry out the communication or receive the wake-up signal. It can furthermore be possible that the communication arrangement is designed to determine a piece of repetition information which is specific for an unsuccessful signal transmission, in particular authentication information from the identification transmitter to the communication arrangement, during the communication, the adaptation device being designed to determine the adaptation To increase the extent of the safety area as a function of the repetition information in the event of the unsuccessful signal transmission, and otherwise to reduce it repeatedly. This covers the case that the communication between the ID transmitter and the vehicle cannot be established when, for. B. the response signal is not sent out within the safety area. In this case, the security area defines the area in which the transmission range of the ID transmitter is sufficient to transmit the response signal to the vehicle. It is particularly advantageous here that the communication arrangement is designed to receive repetition information from the identification transmitter which indicates an unsuccessful signal transmission by the identification transmitter.

Furthermore, it can be provided within the scope of the invention that at least one activation unit is provided, preferably in the form of a proximity sensor, preferably an optical or capacitive (proximity) sensor, which is particularly preferably arranged in a door handle to enable an activation action by a user of the To detect the vehicle, and in particular to activate the security-relevant function as a function of an authentication process if the detection is successful. For this purpose, the authentication process, for. B. be initiated by sending a wake-up signal. This means that access to the vehicle can be reliably controlled.

It is also possible, if necessary, for the adaptation device to be in signal connection with an activation unit in order to determine repetition information as a function of an unsuccessful activation action. In this way, the corresponding information can be used for an automatic adaptation determination that in this case the safety area does not have sufficient extension.

It may further be possible for a localization arrangement to be provided for determining a current location of the vehicle, the adaptation device being in signal connection with the localization arrangement in order to be able to act as a function of the current location to set the security area. This variant is based on the knowledge that the desired security area (due to external influences or due to user behavior) is often locally dependent. E.g. certain, previously known locations of the vehicle can be recognized, in particular by means of a GPS (Global Positioning System) signal. The security area can then be set using the detected location. If, for example, the vehicle is in front of the vehicle owner's front door, the proximity of the vehicle to the ID transmitter stored in the house can mean that the ID transmitter is permanently in the security area when it is not in use. In order to prevent this, the adaptation determination can be used to reduce the extent of the safety area in this case. This also applies to other parking positions, such as B. in front of a garage. In order to recognize such situations, the current location of the vehicle can e.g. B. can also be processed with other information, such as. B. information about an address of the vehicle owner and / or information about a period of time in which the ID transmitter is continuously recognized within the security area. To determine the location, the localization arrangement includes, for. B. a GPS receiver or the like.

Furthermore, it is optionally provided that the adaptation device is designed to carry out an adaptation determination for setting the safety area on the basis of information about the surroundings of the surroundings of the vehicle, preferably as a function of at least one environment variable which is specific for an (in particular physical) influencing of the safety area, whereby at least one of the following components is preferably provided for recording the environmental information:

a time component for capturing a current time as the

Environment information,

the time component for recording a current date as the environmental information,

an optical detection component for object recognition in the environment, in particular a garage and / or a parking lot and / or trees, in each case as the environment information a detection component for localizing the vehicle (e.g. GPS signal, cell recognition in mobile radio systems and / or WLAN identification) at a location.

This makes it possible to automatically set the safety area depending on the habits of the user of the vehicle, e.g. B. time-controlled to make different settings for certain times. A corresponding assignment of the captured environmental information to a default setting for the security area can, for B. can be specified, in particular programmed, or alternatively determined by a learning algorithm. The detection of environment variables can be derived from a detection of the environment, such as by the reflection behavior of the pattern of communication signals of communication, such as UWB communication signals of UWB communication. The location can also be determined by the detection component for localizing the vehicle and the security area can be influenced as a function of this. For example, the immediate parking position in front of or at the house of a vehicle owner (through the localization) can be recognized and lead to a reduction in the security area so that the ID transmitter located in the immediate vicinity (in the house) does not trigger the security-relevant function inadvertently (For example, the car is in front of or next to the house) if an unauthorized person wants to gain access to the vehicle.

It can furthermore be possible that the adaptation device is designed to carry out the setting of the safety area on the basis of a manual user input, and for this purpose is preferably in signal connection with an input component. Such manual user input can e.g. B. transmitted to the adaptation device by a management system of the vehicle. For this purpose, the input component is z. B. designed as a vehicle display or as the ID transmitter (use of a key combination or the like) or as a smartphone. This z. For example, an increase or decrease in the safety area can be specified manually, or a configuration of an assignment of captured environmental information to a default setting for the safety area can also be performed.

Optionally, it is conceivable that the adaptation device has a storage device in order to non-volatile information about the current setting, in particular a learning result of an automatic adaptation determination, preferably a learning algorithm Save to permanently adjust the extent of the safety area until it is set again using this information. The learning outcome is z. B. an assignment of captured environmental information to a default setting for the safety area, or repetition information or the resulting setting of the safety area.

The invention also relates to a method for activating a (in particular safety-relevant) function in a vehicle. It is provided that the following steps are carried out, preferably one after the other or in any order: a) Providing wireless communication of the vehicle with a mobile identification transmitter within at least one security area, the communication being limited by a spatial extension of the security area around the vehicle for activation the (especially safety-relevant) function is provided,

b) Setting the safety area in order to adapt the extent of the safety area in a variable (changeable) manner, in particular as a function of an adaptation determination.

The method according to the invention thus has the same advantages as have been described in detail with reference to a security system according to the invention. In addition, the method can be suitable for operating a security system according to the invention so that in particular step a) is carried out by a communication arrangement of the security system according to the invention and / or step b) by an adaptation device of the security system according to the invention.

Advantageously, it can be provided within the scope of the invention that the following steps are carried out in step a) to provide the communication:

Transmission of a wake-up signal by the vehicle, in particular by a communication arrangement, preferably via UWB or LF or HF, with a range of the wake-up signal preferably defining the safety area, reception of the wake-up signal by the identification transmitter, in particular only when the identification transmitter is located within the security area, Transmission of a response signal with authentication information by the identification transmitter to the vehicle, in particular only when the identification transmitter is located within the security area, the ID transmitter itself preferably checking its location within the security area for this purpose,

Receipt of the response signal with the authentication information by the vehicle,

Performing an evaluation of the authentication information, preferably by comparing it with a secret key or code or the like,

Activation of the security-relevant function as a function of the evaluation, in particular only when the identification transmitter is located within the security area, with a distance measurement of the distance between the vehicle and the ID transmitter preferably being carried out for this purpose.

It is possible that the wake-up signal is sent out by HF or LF or Bluetooth or WLAN or cellular radio or UWB. The transmission of the response signal can also be carried out by HF or LF or Bluetooth or WLAN or cellular radio or UWB.

Further advantages, features and details of the invention emerge from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. Show it:

Figure 1 is a schematic representation of a security system according to the invention,

Figure 2 shows a further schematic representation of an inventive

Security system,

FIG. 3 shows a schematic representation for the visualization of an inventive

Procedure. In the following figures, the same reference numerals are used for the same technical features from different exemplary embodiments.

FIG. 1 shows a safety system 1 according to the invention for a vehicle 2, which is used to activate a safety-relevant function in the vehicle 2. This has a communication arrangement 10 (of the vehicle 2) for providing wireless communication with a mobile identification transmitter 200 (outside of the vehicle 2) within a security area 100 in order to limit the communication by a spatial extension of the security area 100 around the vehicle 2 to activate the provide a safety-relevant function. In addition, the security system 1 has an adaptation device 20 for setting the security area 100 in order to variably adapt the extent of the security area 100, in particular as a function of an automatic adaptation determination. The variable adjustment serves z. B. to reduce the safety area 100 in order to obtain the reduced safety area 100 ‘. Conversely, an expansion (enlargement) of the safety area 100 'is also conceivable in order to obtain the safety area 100. The safety area 100, 100 'can correspond to a circular shape around the vehicle 2, or as shown, e.g. B. due to influences in the environment of the vehicle 2 differ. An object 7 in the vicinity is shown as a possible influence.

The adaptation device 20 can be designed to set the security area 100 as a setting of a parameter for communication, in particular a signal strength and / or range, in the communication arrangement 10 in order to limit the communication by the spatial extent of the security area 100, in particular by adjusting the extent of the security area 100 as a physical limitation of the ability to communicate. Alternatively or additionally, the adaptation device 20 can be designed to carry out the setting of the security area 100 as a setting of an evaluation of the communication in order to limit the communication by the spatial extent of the security area 100, in particular by the fact that the activation of the security-relevant function by the evaluation is prevented if the identification transmitter 200 is located outside the security area 100. In Figure 1 it is shown that the identification transmitter 200 is located outside the reduced security area 100 ', and therefore in this case the communication with the Vehicle 2 is limited. So z. This means, for example, that the identification transmitter 200 cannot receive a communication signal S of the communication, such as a wake-up signal, outside the security area 100 ′.

The adaptation device 20 can be designed to carry out an automatic adaptation determination in order to detect influences, such as by the object 7, in the surroundings of the vehicle 2 on the safety area 100 and, based on this, to set the safety area 100 to compensate for these influences.

As shown in FIG. 2, the communication arrangement 10 can have at least one UWB interface 13 for providing communication via UWB radio. A localization arrangement 30 can also be provided to provide a localization of the identification transmitter 200, the localization arrangement 30 preferably having a localization unit 31 in order to carry out a time-of-flight evaluation and / or an evaluation of a signal strength of a communication signal S of the communication for localization.

Furthermore, the adaptation device 20 can have a storage device 21 in order to store automatically detected influences in the surroundings of the vehicle 2 on the security area 100 in a non-volatile manner, the communication arrangement 10 being in signal connection with the adaptation device 20 in order, based on the stored influences, provide communication.

Furthermore, at least one activation unit 40 can be provided, preferably in the form of a proximity sensor, preferably an optical or capacitive proximity sensor, which is particularly preferably arranged in a door handle 3 in order to detect an activation action by a user of the vehicle 2 and, if the detection is successful, the Activate security-relevant function depending on an authentication process.

Furthermore, the adaptation device 20 can be designed to carry out an adaptation determination for setting the safety area 100 on the basis of information about the surroundings of the surroundings of the vehicle 2, preferably as a function of at least one environment variable which is specific for influencing the security area 100, with at least one of the following components preferably being provided for recording the environment information:

a time component 71 for acquiring a current time as the environmental information,

the time component 71 for acquiring a current date as the environmental information,

an optical detection component 72 for object recognition in the environment, in particular a garage and / or a parking lot and / or trees, in each case as the environment information.

In addition, the adaptation device 20 can be designed to carry out the setting of the security area 100 on the basis of a manual user input, and preferably to be in signal connection with an input component 73 for this purpose.

A method according to the invention is visualized schematically in FIG. According to a first method step 301, wireless communication of the vehicle 2 with a mobile identification transmitter 200 takes place within a security area 100, the communication being provided limited by a spatial extension of the security area 100 around the vehicle 2 for activating the security-relevant function. In accordance with a second method step 302, the safety area 100 is then set in order to variably adapt the extent of the safety area 100, in particular as a function of an adaptation determination.

The above explanation of the embodiments describes the present invention exclusively in the context of examples. Of course, individual features of the embodiments can be freely combined with one another, provided that they are technically sensible, without leaving the scope of the present invention. B ez uqs sign list

1 security system

2 vehicle

3 door handle

7 object

10 Communication arrangement

13 UWB interface

20 adjustment device

21 storage device

30 Location Arrangement

31 Localization Unit

40 activation unit

71 Time component

72 Acquisition component

73 Input component

100 Security Area, Authentication Area

100 ‘adapted security area

200 ID transmitters

S communication signal

301 first procedural step

302 second process step

Claims

Patent claims

1. Safety system (1) for a vehicle (2) for activating a safety-relevant function in the vehicle (2), comprising:

- A communication arrangement (10) for providing a wireless

Communication with a mobile identification transmitter (200) within a security area (100) in order to provide the communication limited by a spatial extension of the security area (100) around the vehicle (2) to activate the security-relevant function,

- An adaptation device (20) for setting the safety area (100) in order to variably adapt the extent of the safety area (100), in particular as a function of an automatic adaptation determination.

2. Security system (1) according to claim 1,

characterized,

that the adaptation device (20) is designed to set the security area (100) as a setting of a parameter for communication, in particular a signal strength and / or range, in the communication arrangement (10) in order to enable communication through the spatial extent of the To limit the security area (100), in particular in that the extent of the security area (100) is adapted as a physical limitation of the ability to communicate.

3. Security system (1) according to claim 1 or 2,

characterized,

that the adaptation device (20) is designed to carry out the setting of the safety area (100) as a setting of an evaluation of the communication in order to limit the communication by the spatial extent of the safety area (100), in particular by activating the safety-relevant function is prevented by the evaluation if the identification transmitter (200) is located outside the security area (100).

4. Safety system (1) according to one of the preceding claims,

characterized,

that the communication arrangement (10) has at least one UWB interface (13) for providing communication via UWB radio, in order in particular to provide at least one of the following functions through the communication:

- Sending a wake-up signal to the identification transmitter (200) in order to initiate a transmission of authentication information from the identification transmitter (200) to the vehicle (2),

Receiving a response signal from the identification transmitter (200) in order to receive the authentication information and to evaluate it in order to activate the security-relevant function based on the evaluation,

Detection of the surroundings of the vehicle (2) in order to carry out the setting of the safety area (100) based on the detection,

Locating the identification transmitter (200) relative to the security area (100), in particular to prevent the activation of the security-relevant function when the identification transmitter (200) is located outside the security area (100).

5. Security system (1) according to one of the preceding claims,

characterized,

that a localization arrangement (30) is provided in order to provide a localization of the identification transmitter (200), the localization arrangement (30) preferably having a localization unit (31) in order to provide a time-of-flight evaluation and / or an evaluation of a signal strength for localization of a communication signal (S) of the communication.

6. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) is in signal connection with the communication arrangement (10) in order to generate the security area (100) according to the setting, preferably by adapting the communication.

7. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) is designed to carry out an automatic adaptation determination in order to detect influences in the surroundings of the vehicle (2) on the safety area (100) and based thereon to set the safety area (100) to compensate for these influences.

8. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) has a memory device (21) in order to store automatically detected influences in the surroundings of the vehicle (2) on the security area (100) in a non-volatile manner, the communication arrangement (10) with the adaptation device (20) in FIG Signal connection is in order to provide the communication based on the stored influences.

9. Security system (1) according to one of the preceding claims,

characterized, that the adaptation device (20) is designed to carry out an automatic adaptation determination in the form of a learning algorithm in order to carry out the setting of the safety area (100).

10. Security system (1) according to one of the preceding claims,

characterized,

that the communication arrangement (10) is designed to generate the security area (100) as an authentication area (100) and to initiate an authentication process for activating the security-relevant function through the communication in the authentication area (100), the adaptation device (20) for this purpose is carried out:

to determine the adaptation, the extension of the safety area (100) as a function of the repetition information in the case of the unsuccessful

To increase activation action,

and otherwise reduce repeatedly.

11. Security system (1) according to one of the preceding claims,

characterized,

that at least one activation unit (40) is provided, preferably in the form of a proximity sensor, preferably an optical or capacitive proximity sensor, which is particularly preferably arranged in a door handle (3) in order to detect an activation action by a user of the vehicle (2), and in order to activate the security-relevant function depending on an authentication process if the detection is successful.

12. Security system (1) according to one of the preceding claims,

characterized,

that a localization arrangement (30) is provided for determining a current location of the vehicle (2), the adaptation device (20) being in signal connection with the localization arrangement (30) in order to set the safety area (100) depending on the current location.

13. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) is designed to carry out an adaptation determination for setting the safety area (100) based on information about the surroundings of the vehicle (2), preferably as a function of at least one environment variable which is specific for influencing the safety area (100) is, whereby at least one of the following components is preferably provided for recording the environmental information:

a time component (71) for detecting a current time as the environmental information,

the time component (71) for detecting a current date as the environmental information,

an optical detection component (72) for object recognition in the environment, in particular a garage and / or a parking lot and / or trees, in each case as the environment information

a detection component (72) for localizing the vehicle at a location.

14. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) is designed to carry out the setting of the safety area (100) on the basis of a manual user input, and is preferably in signal connection with an input component (73) for this purpose.

15. Security system (1) according to one of the preceding claims,

characterized,

that the adaptation device (20) has a storage device (21) in order to store information about the current setting, in particular a learning result of an automatic adaptation determination, preferably a learning algorithm, in a non-volatile manner, in order to permanently store the extent of the safety area (100) up to new setting based on this information.

16. A method for activating a safety-relevant function in a vehicle (2), the following steps being carried out:

a) Provision of wireless communication between the vehicle (2) and a mobile identification transmitter (200) within a security area (100), the communication being provided limited by a spatial extension of the security area (100) around the vehicle (2) for activating the security-relevant function becomes,

b) setting the safety area (100) in order to variably adapt the extent of the safety area (100), in particular as a function of an adaptation determination.

17. The method according to any one of the preceding claims,

characterized,

that in step a) the following steps are carried out to provide communication:

- Emission of a wake-up signal by the vehicle (2), wherein in particular a range of the wake-up signal defines the safety area (100),

Receipt of the wake-up signal by the identification transmitter (200), in particular only when the identification transmitter (200) is located within the security area (100),

- Transmission of a response signal with authentication information by the identification transmitter (200) to the vehicle (2), in particular only when the identification transmitter (200) is located within the security area (100), the vehicle (2) receives the response signal with the authentication information ),

Performing an evaluation of the authentication information,

- Activation of the security-relevant function as a function of the evaluation, in particular only when the identification transmitter (200) is located within the security area (100).

18. The method according to any one of the preceding claims,

characterized,

that a security system (1) is operated according to one of the preceding claims, so that in particular step a) is carried out by a communication arrangement (10) of the security system (1) and / or step b) by an adaptation device (20) of the security system (1).