DE102020127437A1 - Arrangement for detecting an activation action and for communication in a vehicle - Google Patents

Abstract

The invention relates to an arrangement (10) for detecting (260) an activation action and for communication in a vehicle (1), in particular designed for integration into the vehicle (1), having:
- a communication arrangement (100) for a repeated output (160) of an electrical communication signal (20) via a transmission connection (110) in order to provide the communication,
- a sensor arrangement (200) for detecting (260) the activation action,
- a coupling arrangement (300) which is electrically connected to the transmission connection (110),
- An electronic processing device (210) of the sensor arrangement (200), which is electrically connected to the coupling arrangement (300) in order to detect the output (160) of the communication signal (20) via the coupling arrangement (300).

Description

The present invention relates to an arrangement for detecting an activation action and for communication in a vehicle. Furthermore, the invention relates to a method for this purpose.

It is known from the prior art that sensors, and in particular capacitive sensors, can be used on vehicles to detect an approach. For example, the approach is an activation action with which a user can activate a function on the vehicle. In the case of safety-related functions, such as unlocking the vehicle, it is usually provided that the activation of the function requires successful authentication by means of communication between the vehicle and a mobile device. The detection of the activation action can then initially lead to the initiation of the authentication via the communication, in order then to activate the function if the authentication is successful. Correspondingly, the sensor and a communication arrangement for communication can be arranged adjacently. The communication and the detection can then be carried out repeatedly in parallel, but alternately if possible.

A disadvantage of the known solutions is that the communication, in particular near-field communication, and the detection can collide. For example, the generation of the alternating magnetic field during near-field communication can disrupt the detection.

It is therefore an object of the present invention to at least partially eliminate the disadvantages described above. In particular, it is an object of the present invention to provide an improved solution for the detection of the activation action, even if the communication is provided in parallel therewith.

The above object is achieved by an arrangement having the features of the independent device claim and by a method having the features of the independent method claim. Further features and details of the invention result from the respective dependent claims, the description and the drawings. Features and details that are described in connection with the arrangement according to the invention naturally also apply in connection with the method according to the invention, and vice versa, so that the disclosure of the individual aspects of the invention is or can always be referred to mutually.

The object is achieved in particular by a (particularly electronic) arrangement for (preferably capacitive) detection of an activation action and preferably for communication, particularly preferably in a vehicle. It is provided in particular that the arrangement according to the invention is designed for integration into the vehicle, e.g. B. in a door handle or other vehicle component of the vehicle. For this purpose, the arrangement z. B. have fasteners to be mounted in the vehicle component. An arrangement is preferably understood to mean an electronic circuit arrangement.

• - eine (insbesondere elektronische) Kommunikationsanordnung für eine wiederholte Ausgabe eines elektrischen Kommunikationssignals über eine (insbesondere elektrische, d. h. elektrisch leitfähige) Sendeverbindung, um die Kommunikation bereitzustellen, wobei vorzugsweise die wiederholte Ausgabe in vordefinierten zeitlichen Abständen (nachfolgend als Ausgabeintervall bezeichnet) durchgeführt wird, und insbesondere das hierbei jeweils ausgegebene Kommunikationssignal eine vordefinierte Signaldauer (bspw. 40 µs) und Frequenz, insbesondere NFC-Frequenz (d. h. üblicherweise 13,56 MHz), aufweist,
• - eine (insbesondere elektronische) Sensoranordnung für die (insbesondere kapazitive und/oder wiederholte) Erfassung der Aktivierungshandlung, wobei vorzugsweise hierzu in vordefinierten zeitlichen Abständen wiederholt eine Sensorelektrode ausgewertet wird, insbesondere durch wiederholte Ladungsübertragungen,
• - eine (insbesondere elektrisch leitfähige) Kopplungsanordnung, welche elektrisch mit der Sendeverbindung (insbesondere direkt) verbunden ist,
• - eine (insbesondere elektronische) Verarbeitungsvorrichtung der Sensoranordnung, welche mit der Kopplungsanordnung elektrisch verschaltet ist (insbesondere direkt elektrisch verbunden ist), um über die Kopplungsanordnung die Ausgabe des Kommunikationssignals zu detektieren.

Furthermore, the arrangement according to the invention can have the following components, preferably mounted on a printed circuit board of the arrangement:

• - A (in particular electronic) communication arrangement for a repeated output of an electrical communication signal via a (in particular electrical, i.e. electrically conductive) transmission connection in order to provide the communication, the repeated output preferably being carried out at predefined time intervals (hereinafter referred to as the output interval), and in particular the communication signal that is output here has a predefined signal duration (e.g. 40 µs) and frequency, in particular NFC frequency (ie usually 13.56 MHz),
• - a (particularly electronic) sensor arrangement for the (particularly capacitive and/or repeated) detection of the activation action, a sensor electrode preferably being repeatedly evaluated for this purpose at predefined time intervals, in particular by means of repeated charge transfers,
• - a (in particular electrically conductive) coupling arrangement which is electrically connected to the transmission connection (in particular directly),
• - A (in particular electronic) processing device of the sensor arrangement, which is electrically connected to the coupling arrangement (in particular is electrically connected directly) in order to detect the output of the communication signal via the coupling arrangement.

In other words, feedback of the communication signal, e.g. B. NFC (Near Field Communication) signal to the processing device for the detection of the communication, in particular an NFC operation, are used. The invention can thus enable the output of the Communication signal can be detected to detect a temporally at least partially overlapping detection (ie a collision). For this purpose, the communication signal, for example an NFC ping, can be partially fed back to the processing device via the coupling arrangement. For example, the coupling arrangement picks up the communication signal at the transmission connection for this purpose. The transmission connection can in turn be electrically connected to a transmission output pin (TX pin) of the communication arrangement. The communication signal can also optionally be tapped off directly at the transmission output pin, with the transmission connection then being designed as the output pin. The transmission connection is provided in particular to transmit the communication signal to a communication element, in particular a transmission antenna for the communication. The communication signal can accordingly be embodied as an antenna signal. The communication signal is z. B. partially transmitted via the coupling arrangement to an input port of the processing device. In this way, the returned communication signal can trigger an interrupt in the processing device, so that acquisition values acquired at this point in time are discarded, since they were acquired at the same time as the communication signal was output and are therefore disturbed. It is thus an advantage of the invention that the reliability of the detection can be improved when operating in parallel with the communication arrangement.

The communication arrangement and/or the processing device and/or the sensor arrangement can each have an integrated circuit such as a microcontroller or be designed as such an integrated circuit. The integrated circuit can have multiple inputs and/or outputs (e.g. pins or ports) in order to receive and/or transmit electrical signals. The communication signal can e.g. B. are output via an output of the communication arrangement as an electrical signal, and are transmitted via at least one conductor track of the printed circuit board. In this way, the output communication signal can be transmitted to a communication element such as an antenna via the transmission connection to generate a magnetic field, which serves for communication. The transmission connection can also be designed as a conductor track. A part of the communication signal can also be branched off by the coupling arrangement via at least one conductor track of the printed circuit board and fed back to an input of the processing device.

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 vehicle electrical system and/or an electric motor. It can also be possible for the vehicle to be in the form of a fuel cell vehicle and/or passenger vehicle and/or semi-autonomous or autonomous vehicle.

Advantageously, the vehicle has a security system which z. B. enables authentication through communication with a mobile device such as an identification transmitter (ID transmitter) or smartphone. At least one function of the vehicle can be activated as a function of the communication and/or the authentication. If the authentication of the mobile device is necessary for this, the function can be a security-related function, such as unlocking the vehicle or enabling an engine start. The security system can thus also be designed as a passive access system, which initiates the authentication and/or the activation of the function when the approach of the mobile device to the vehicle is detected without active manual operation of the mobile device. For this purpose, for example, the communication signal is repeatedly sent out, which can be received by the mobile device when approaching, and then the authentication is triggered. It is also possible for the communication to be initiated when the activation action, such as the approach, is detected by the detection of the sensor arrangement. The function can also involve activation of vehicle lighting and/or actuation (opening and/or closing) of a flap (e.g. front or rear or side flap or door). For example, the vehicle lighting is automatically activated when the approach is detected and/or the flap is actuated when the activation action of a user is detected.

It is also advantageous if the communication arrangement is designed to carry out the communication in the form of near-field communication (in particular NFC) via a communication element, for which purpose the transmission connection can be designed for electrical connection to the communication element in order to transmit the communication signal to the communication element ( electrically) and to preferably generate a communication area for near-field communication, in particular for communication with a mobile device such as a smartphone or an NFC transponder. In this case, the near-field communication can be spatially limited to this communication area, so that it is necessary for the mobile device to approach it, which can possibly be detected by detecting the activation action. It may also be possible that the communication signal appears as a ping Signal is designed to detect the approach of the mobile device and / or the entry of the mobile device into the communication range.

Furthermore, it can be provided that the sensor arrangement is designed as a capacitive sensor which has at least one electrically conductive sensor electrode in order to carry out the detection via the sensor electrode as a capacitive detection, the sensor electrode preferably being adjacent to a communication element for the communication of the communication arrangement is arranged. The detection can e.g. B. be performed by repeated charge transfers to the sensor electrode, wherein the amount of charge transferred can be evaluated by the processing device to measure a varying capacitance provided by the sensor electrode. The change in capacitance can depend on the activation action, such as approaching the sensor electrode. For example, the amount of charge transferred may be represented by the sensing values of the sensing. For this purpose, for example, the charge is transferred to a capacitor or integrator and an analog-to-digital conversion of the voltage across the capacitor or at the integrator is carried out in order to obtain the detection values digitally. The detection values can then be temporarily stored for evaluating the variable capacitance and/or for detecting or detecting the activation action.

It is also conceivable that the processing device is designed to receive part of the communication signal (i.e. the returned communication signal) via the coupling arrangement, in particular in order to detect a collision of the communication with the detection, preferably in order to, upon detection of the collision, to suspend collection. The detection can e.g. B. be suspended in that the detection values detected simultaneously with the output of the communication signal are discarded. The communication signal can be an NFC ping, which is used, for example, to detect an NFC transponder, in particular to detect an NFC card, by the communication arrangement. However, it can be a problem that the NFC front end of the communication arrangement does not provide any feedback during this detection or output of the NFC ping. Therefore, the coupling arrangement can be used to feed back the communication signal (in particular the ping signal) directly to a port of the processing device, e.g. B. a microcontroller serve. If the detection occurs at the same time as the communication signal is output, it can be recognized as a collision.

In order to suspend the detection, when the collision is detected, e.g. B. an interrupt of the processing device can be triggered, which means that the detection values of the detection during the output cannot lead to the detection of the activation action. In this way collision detection is possible.

It can be advantageous if, within the scope of the invention, the processing device is designed to receive part of the communication signal via the coupling arrangement and to evaluate it by means of undersampling, in particular to measure it, in order (on the basis of this evaluation or measurement) to output the communication signal detect. The undersampling can be necessary or useful since the frequency of the communication signal for the evaluation, in particular the measurement, by the processing device is possibly too high. The processing device may be designed primarily to perform the detection and not to measure the frequency of the communication signal. It can also be possible that the processing device is temporarily operated in an energy-saving mode in which the clock frequency of the processing device is reduced and is therefore not sufficient for loss-free measurement of the frequency of the communication signal. In particular, undersampling means that the sampling of the returned communication signal is performed by the processing device with less than twice the bandwidth and/or does not fulfill the conditions of the Nyquist-Shannon sampling theorem.

For example, the communication signal can be implemented as a signal (in particular ping) with a frequency (in particular NFC carrier frequency) of 13.56 MHz and/or with a signal duration of 40 μs. The communication signal is then output at the frequency for the duration of the signal and then pauses until the next output. The frequency can be too high for direct evaluation, in particular measurement, by the processing device. For example, a counter component such as an event counter of the processing device can be used to count the frequency of the communication signal in a lossy manner and, depending on the result, to trigger an interrupt in the processing device, which suspends the acquisition, i. H. in particular discards the current acquisition values. However, the lossy counting of the NFC carrier frequency can be controlled and therefore still be valid. It has surprisingly turned out that, despite the undersampling, the result or the evaluation is specific to the presence of the output of the communication signal and can be used to distinguish when the output takes place and when not.

Furthermore, it is optionally possible within the scope of the invention for the communication arrangement to be designed to transmit the communication signal at a frequency of essentially 13.56 MHz and/or with a signal duration in the range from 10 µs to 80 µs, preferably 20 µs to 60 μs, preferably essentially 40 μs, and/or with an interval (referred to as the output interval) in the range from 50 ms to 200 ms, preferably essentially 100 ms, repeatedly over time. It is possible that a crystal is not used for the clock of the components, so that deviations from the specified values are implied.

Furthermore, the detection by the sensor arrangement can also be carried out repeatedly, in particular synchronized with the output of the communication signal, the detection of the output of the communication signal preferably being used for synchronization in order to avoid simultaneous output and detection, ie a collision.

The communication arrangement can be configured separately from the sensor arrangement, in particular encapsulated by the sensor arrangement, so that the sensor arrangement cannot communicate directly with the communication arrangement or cannot receive a signal directly from the communication arrangement, which communicates the output of the communication signal. Provision can therefore be made for the communication signal to be “tapped” via the coupling arrangement, ie branched off in terms of circuitry. However, this makes it necessary for the processing device to check whether the communication signal is actually present at the coupling arrangement, or some other signal (an edge or a high-low level cannot simply be evaluated). For this purpose, the detection of the output can include a measurement, in particular a frequency measurement, in the returned communication signal by the processing device.

Furthermore, it can be provided within the scope of the invention that the processing device is designed to repeatedly initiate the detection parallel to the repeated output of the communication signal, and to recognize a detection overlapping with the output based on a part of the communication signal fed back via the coupling arrangement as a collision. For example, the coupling arrangement connects a transmit (Tx) pin of the communication arrangement to a port of the processing device. If the communication signal is detected via this port, e.g. B. by a frequency evaluation, the detection values resulting from the overlapping detection can be discarded.

It can be provided that a sensor electrode is at least partially operated by the processing device for the detection of a sensor signal, wherein the sensor signal can bring about electrical charge transfers to the sensor electrode. The sensor signal for the detection is transmitted at 333 kHz, for example. Accordingly, the processing device, which may also generate or evaluate the sensor signal, may not be suitable for lossless sampling of the communication signal. Nevertheless, undersampling is possible, which has been found to be sufficient to only perform the detection of the output.

In a further possibility, it can be provided that the processing device is designed to carry out a frequency evaluation of the communication signal, preferably a frequency measurement, in particular by means of undersampling, of the communication signal via the coupling arrangement. This comes z. B. a counter of the processing device with 2 to 16 MHz is used, whereby the clock frequency can vary depending on the mode, z. B. depending on whether a power saving mode of the processing device is present.

A further advantage can be achieved within the scope of the invention if the processing device has a counter component in order to carry out a frequency evaluation of the communication signal via the coupling arrangement. Depending on the counter reading, the presence of the communication signal, ie the output, can then be inferred. As a counter component z. B. a counter (engl. Counter) of the processing device is used.

Optionally, it can be provided that the processing device is designed to be operated in different operating modes, which differ in terms of a clock frequency of the processing device. The scanning capability for the communication signal can be dependent on the clock frequency. Depending on the clock frequency, it may therefore be necessary for the processing device to sample the returned communication signal in the form of undersampling. The operating modes can e.g. B. include a normal operation and a power saving mode, wherein in the power saving mode the processing device z. B. is operated with a clock frequency of 2 MHz. In normal operation, the processing device can e.g. B. be operated with a clock frequency of 16 MHz.

It is also advantageous if the coupling arrangement has a coupling resistor in order to filter the communication signal, in particular specially low-pass filtered, to be fed back to the processing device. For this purpose, the coupling arrangement can optionally also have a coil or a capacitor, but can advantageously use the input capacitance of an input of the processing device, to which the coupling arrangement can be electrically connected for forwarding the communication signal. Furthermore, this also enables interference suppression of the detection of the output of the communication signal. The coupling resistance is in particular an ohmic resistance.

According to a further possibility, it can be provided that the coupling arrangement has a coupling resistor which is electrically connected to an input of the processing device in order to form a filter, in particular a low-pass filter, with an input capacitance of the input. The entrance is e.g. B. a port, the input capacity is z. B. the port capacitance, which together with the coupling resistance can have a low-pass effect. For the filter, the cut-off frequency is z. B. in the range of 15 to 20 MHz. This enables a passband for a frequency of the communication signal, in particular NFC frequency, e.g. 13.56MHz. The output, in particular the TX output pin, of the communication arrangement, via which the communication signal is output, can have very low impedance, e.g. B. only in the range of 2 ohms. The coupling resistance, however, z. B. have a resistance in the range of 680 ohms, and the input capacitance z. 15 pF (picofarads). It is thus possible to provide a filter for detecting the output of the communication signal with little technical effort.

For example, it can be provided that the coupling arrangement has a coupling resistance which is adapted to an input capacitance of an input of the processing device. For example, the adaptation (for example using a simulation) takes place in such a way that the frequency of the communication signal is allowed to pass through to the input and other frequencies are damped, in particular a low-pass effect is achieved.

• - Durchführen einer wiederholten Ausgabe eines elektrischen Kommunikationssignals durch eine Kommunikationsanordnung über eine Sendeverbindung, um die Kommunikation bereitzustellen,
• - Durchführen der Erfassung der Aktivierungshandlung durch eine Sensoranordnung,
• - Durchführen einer Detektion der Ausgabe des Kommunikationssignals durch eine elektronische Verarbeitungsvorrichtung der Sensoranordnung über eine Kopplungsanordnung, wobei die Kopplungsanordnung elektrisch mit der Sendeverbindung verbunden ist.

The invention also relates to a method for (in particular capacitive) detection of an activation action and for communication in a vehicle. It is provided that the following steps are carried out, preferably one after the other or in any order, whereby the steps can also be carried out repeatedly:

• - performing repeated issuance of an electrical communication signal by a communication arrangement over a transmission link to provide the communication,
• - performing the detection of the activation action by a sensor arrangement,
• - performing a detection of the output of the communication signal by an electronic processing device of the sensor arrangement via a coupling arrangement, wherein the coupling arrangement is electrically connected to the transmission connection.

The method according to the invention thus brings with it the same advantages as have been described in detail with reference to an arrangement according to the invention. In addition, it can be provided within the scope of the invention that the steps of the method are carried out by an arrangement according to the invention.

• 1 eine schematische Darstellung von Teilen einer erfindungsgemäßen Anordnung,
• 2 eine weitere schematische Darstellung von Teilen einer erfindungsgemäßen Anordnung montiert an einem Fahrzeug und
• 3 eine schematische Darstellung zur Visualisierung eines erfindungsgemäßen Verfahrens.

Further advantages, features and details of the invention result 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:

• 1 a schematic representation of parts of an arrangement according to the invention,
• 2 a further schematic representation of parts of an arrangement according to the invention mounted on a vehicle and
• 3 a schematic representation for visualizing a method according to the invention.

In the following figures, the same reference numbers are used for the same technical features of different exemplary embodiments.

In 1 an arrangement 10 according to the invention for a—in particular capacitive—detection 260 of an activation action and for communication in a vehicle 1 is shown. The arrangement 10 according to the invention can be used as a circuit arrangement z. B. have at least or exactly one circuit board on which the components of the assembly 10 are attached.

In 2 the arrangement 10 according to the invention is shown in the state integrated into the vehicle 1 . The arrangement 10 z. B. be mounted in a door handle 2 to a communication area 150 for communication adjacent to the door handle 2 to provide. The communication can be limited to the communication area 150, and thus z. B. only be possible in the vicinity of the vehicle 1.

Furthermore, in 1 the components of an arrangement 10 according to the invention are shown in more detail. A communication arrangement 100 can be provided for a repeated output 160 of an electrical communication signal 20 via an electrical transmission connection 110 in order to thereby provide the communication. In this way, the communication area 150 can be generated, in particular by the output 160 of the communication signal 20 to a communication element 120 . The communication element 120 is designed, for example, as a communication antenna 120, in particular an NFC antenna coil. Thus, the output 160 of the communication signal 20 can result in an alternating magnetic field being created in the area around the communication element 120, which can be used for near-field communication.

Furthermore, a sensor arrangement 200 for the detection 260 of the activation action can be provided in order, for example, to detect the activation action as an approach to the door handle 2 . The approach can also be detected in the communication area 150, for example.

Furthermore, a coupling arrangement 300 is provided, which is electrically connected to the transmission connection 110 . The coupling arrangement 300 may be a branch of the transmission link 110 in order to electrically partially feed back the communication signal 20 to an electronic processing device 210 of the sensor arrangement 200 . The processing device 210, which is electrically connected to the coupling arrangement 300, in particular is electrically directly connected via an input 240, can in this way detect the output 160 of the communication signal 20 via the coupling arrangement 300.

In an optional configuration, the sensor arrangement 200 can be embodied as a capacitive sensor which has at least one electrically conductive sensor electrode 220 in order to carry out the detection 260 via the sensor electrode 220 as a capacitive detection 260 . In this case, the sensor electrode 220 can be arranged adjacent to the communication element 120 for the communication of the communication arrangement 100 . Correspondingly, however, the output 160 of the communication signal 20 to the communication element 120 can also lead to the detection 260 being disrupted. Therefore, the processing device 210 can be designed to receive a part of the communication signal 20 via the coupling arrangement 300 in order to detect a collision 265 of the communication with the detection 260 in order to suspend the detection 260 when the collision 265 is detected.

The processing device 210 is designed to carry out a frequency evaluation of the communication signal 20 via the coupling arrangement 300 by means of undersampling of the communication signal 20 . It is possible that the communication arrangement 100 can be designed to transmit the communication signal 20 at a frequency of essentially 13.56 MHz and/or with a signal duration in the range of 40 μs and/or with an interval in the range of 100 ms. output repeatedly over time. The undersampling can therefore be necessary, in particular when the processing device 210 is designed to be operated in different operating modes which differ in terms of a clock frequency of the processing device 210 . The processing device 210 can have a counter component 230 in order to carry out the frequency evaluation of the communication signal 20 via the coupling arrangement 300 .

Furthermore, the coupling arrangement 300 can have a coupling resistor 310 in order to return the communication signal 20 to the processing device 210 in a filtered manner. In this case, the coupling resistor 310 can be electrically connected to the input 240 of the processing device 210 in order to form a filter with an input capacitance of the input 240 .

Out of 3 In an exemplary course of the communication and detection 260 over time t, it can be seen that the processing device 210 can be configured to repeatedly initiate the detection 260 parallel to the repeated output 160 of the communication signal 20, and a detection 260 overlapping with the output 160 ( See reference numeral 265) based on a part of the communication signal 20 fed back via the coupling arrangement 300 as a collision 265.

The above explanation of the embodiments describes the present invention exclusively in the context of examples. It goes without saying that individual features of the embodiments can be freely combined with one another, insofar as this makes technical sense, without departing from the scope of the present invention.

Reference List

1

vehicle

2

door handle

10

arrangement

20

communication signal

100

communication arrangement

110

broadcast connection

120

Communication element, communication antenna, NFC coil

150

communication area

160

Output, NFC measurement

200

sensor arrangement

210

processing device

220

sensor electrode

230

counter component

240

Entry

260

capture

265

collision

300

coupling arrangement

310

resistance element, coupling resistance

t

time

Claims (15)

Arrangement (10) for detecting (260) an activation action and for communication in a vehicle (1), in particular designed for integration into the vehicle (1), having: - a communication arrangement (100) for a repeated output (160) of an electrical communication signal (20) via a transmission connection (110) in order to provide the communication, - a sensor arrangement (200) for detecting (260) the activation action, - a coupling arrangement (300) which is electrically connected to the transmission connection (110), - An electronic processing device (210) of the sensor arrangement (200), which is electrically connected to the coupling arrangement (300) in order to detect the output (160) of the communication signal (20) via the coupling arrangement (300). Arrangement (10) after claim 1 , characterized in that the communication arrangement (100) is designed to carry out the communication in the form of near-field communication via a communication element (120), the transmission connection (110) being designed for electrical connection to the communication element (120) for this purpose in order to To transmit communication signal (20) to the communication element (120) and to generate a communication area (150) for the near-field communication. Arrangement (10) after claim 1 or 2 , characterized in that the sensor arrangement (200) is designed as a capacitive sensor which has at least one electrically conductive sensor electrode (220) in order to carry out the detection (260) via the sensor electrode (220) as a capacitive detection (260), wherein the sensor electrode (220) is arranged adjacent to a communication element (120) for communication of the communication arrangement (100). Arrangement (10) according to one of the preceding claims, characterized in that the processing device (210) is designed to receive part of the communication signal (20) via the coupling arrangement (300) in order to avoid a collision of the communication with the detection (260) to detect to suspend the acquisition (260) upon detection of the collision. Arrangement (10) according to one of the preceding claims, characterized in that the processing device (210) is designed to receive part of the communication signal (20) via the coupling arrangement (300) and to evaluate it by means of undersampling in order to output (160) to detect the communication signal (20). Arrangement (10) according to one of the preceding claims, characterized in that the communication arrangement (100) is designed to transmit the communication signal (20) at a frequency of essentially 13.56 MHz and/or with a signal duration in the range from 10 µs to 80 µs, preferably 20 µs to 60 µs, preferably essentially 40 µs, and/or with an interval in the range from 50 ms to 200 ms, preferably essentially 100 ms, repeatedly over time. Arrangement (10) according to one of the preceding claims, characterized in that the processing device (210) is designed to repeatedly initiate the detection (260) parallel to the repeated output (160) of the communication signal (20), and a with the output ( 160) to recognize overlapping detection (260) based on a part of the communication signal (20) fed back via the coupling arrangement (300) as a collision. Arrangement (10) according to one of the preceding claims, characterized in that the processing device (210) is designed to carry out a frequency evaluation of the communication signal (20) via the coupling arrangement (300), in particular by means of undersampling the communication signal (20). Arrangement (10) according to any one of the preceding claims, characterized in that the processing device (210) has a counter component (230) to, via the coupling order (300) to carry out a frequency evaluation of the communication signal (20). Arrangement (10) according to one of the preceding claims, characterized in that the processing device (210) is designed to be operated in different operating modes which differ with regard to a clock frequency of the processing device (210). Arrangement (10) according to any one of the preceding claims, characterized in that the coupling arrangement (300) comprises a coupling resistor (310) in order to return the communication signal (20) filtered to the processing device (210). Arrangement (10) according to one of the preceding claims, characterized in that the coupling arrangement (300) has a coupling resistor (310) which is electrically connected to an input (240) of the processing device (210) in order to be connected to an input capacitance of the input (240 ) to form a filter. Arrangement (10) according to one of the preceding claims, characterized in that the coupling arrangement (300) has a coupling resistor (310) which is adapted to an input capacitance of an input (240) of the processing device (210). Method for detecting (260) an activation action and for communication in a vehicle (1), the following steps being carried out: - performing a repeated output (160) of an electrical communication signal (20) by a communication arrangement (100) via a transmission connection (110) to provide the communication, - performing the detection (260) of the activation action by a sensor arrangement (200), - performing a detection of the output (160) of the communication signal (20) by an electronic processing device (210) of the sensor arrangement (200) via a coupling arrangement (300), wherein the coupling arrangement (300) is electrically connected to the transmission connection (110). Method according to one of the preceding claims, characterized in that the steps of the method are carried out by an arrangement (10) according to one of the preceding claims.

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