DE102019135862A1 - Sensor system with emergency feature for a vehicle - Google Patents

Abstract

The invention relates to a system (100) for a vehicle (60) for triggering at least one function of a safety device (50), the safety device (50) being control-technically connected to a control device (10), the control device (10) having at least one the first sensor (11) is connected, and the first sensor (11) has at least one capacitive sensor element (11.1), the capacitive sensor element (11.1) causing a change in capacitance due to a movement of an object (90.1), in particular an operator (90), can be registered and transmitted to the control device (10), and wherein an NFC unit (22) with an NFC sensor (23) is present, which is connected to the safety device (50) in terms of control technology, and the NFC sensor (23) is suitable for data exchange with a mobile device (80), whereby an identification code can be transmitted. The invention provides that the NFC sensor (23) through the first sensor (11), in particular the capacitive sensor element (11.1), is formed.

Description

The present invention is directed to a system for a vehicle for triggering at least one function of a safety device according to the preamble of the independent system claim. Such systems are used to increase the convenience when accessing the vehicle. An automatic opening or closing of a door, sliding door or flap on the vehicle can be effected. Furthermore, the present invention is also directed to a corresponding vehicle with the system according to the invention. Furthermore, the invention also comprises a method for operating a system for a vehicle for triggering at least one function of a safety device according to the preamble of the independent method claim.

Such systems for a vehicle for triggering at least one function of a safety device are known from the prior art. So-called kick systems are used here, which make it possible that operating the vehicle by kicking the operator behind the vehicle results in the tailgate being able to be opened automatically. The kicking movement of the operator is recorded by the system's sensors and compared with a predefined movement pattern. If the kicking movement carried out by the operator corresponds to the predefined movement pattern, the desired function, here for example opening or closing a tailgate, can be triggered.

However, such systems require a mechanical lock cylinder for security in order to be able to use e.g. B. to be able to open the tailgate. Such an emergency can e.g. B. present due to a failure of the power supply to the system. In order to be able to operate the mechanical lock cylinder, the operator needs a mechanical key. However, more and more vehicles are only being used by mobile devices, such as B. Cell phones open. However, a mechanical key is not provided for these devices. This means that the operator can only carry one additional mechanical key with him in case of an emergency. The mechanical lock cylinders also have the disadvantage that they have to be arranged in an accessible manner on the vehicle, which influences the appearance of the vehicle and the lock cylinder can freeze even at low temperatures.

The object of the present invention is therefore to provide a system for a vehicle for triggering at least one function of a safety device and a method for operating a system which at least partially overcomes the disadvantages known in the prior art. In particular, it is the object of the present invention to create a simple and inexpensive system which can also be operated in an emergency.

The present object is achieved by a system for a vehicle for triggering at least one function of a safety device with the features of the independent system claim, in particular from the characterizing part. A vehicle with a system according to the invention with the features of the vehicle claim is also proposed to achieve the object. Furthermore, the invention is also directed to a method for operating a system for a vehicle for triggering at least one function of a safety device with the features of the independent method claim, in particular from the characterizing part. Preferred developments of the invention are listed in the dependent device and method claims. Features that are disclosed for the system and / or vehicle according to the invention also apply to the method according to the invention and vice versa. In addition, the method according to the invention can be implemented with the system according to the invention.

The system according to the invention according to the main claim for a vehicle for triggering at least one function of a safety device provides that the safety device is connected in terms of control technology to a control device. In the context of the invention, the safety device can be an access control system and / or a central locking system for the vehicle. This safety device triggers a function that z. B. can consist of opening or closing and / or unlocking or locking a door, flap or the like. Before this function is triggered, however, it can be provided that an identification code (called ID code for short) is exchanged, preferably by radio, between the vehicle, in particular the safety device, and a mobile device. The desired function can only be triggered if the ID code sent by the mobile device is compared positively with a predefined code in the safety device. So that the desired function can be triggered, the control device (also) has to send a trigger signal to the safety device. For this purpose, the control device is ideally connected to the safety device via a line. To generate the trigger signal, the control device has at least one first sensor, which has a capacitive sensor element, with the capacitive sensor element being able to register a change in capacitance due to a movement of an object, in particular an operator, and to the Control device is transmitted. The system also has an NFC unit with an NFC sensor, which is connected to the safety device (directly or indirectly) in terms of control technology, and the NFC sensor is suitable for data exchange with the mobile device, whereby the ID code from mobile device is transferable. According to the invention, it is now provided that the NFC sensor is formed by the first sensor, in particular the capacitive sensor element.

The essence of the present invention lies in the fact that an additional NFC sensor can be dispensed with in the present system. Rather, the already existing first sensor forms the required NFC sensor. In addition, by using the NFC unit with the NFC sensor, there is no need for a mechanical locking cylinder. The proposed system can thus be designed in a particularly simple and cost-effective manner. Even in an emergency, the door, sliding door, flap or the like can still be opened by the vehicle, since a corresponding (NFC) signal from the mobile device to open or close and / or to unlock or lock (the doors or flaps) is sent to the NFC -Unit can be sent. This (NFC) signal replaces the mechanical unlocking of the door or flap with the mechanical emergency key. This signal is preferably also coded so that increased security for access to the vehicle is ensured. It is also conceivable that the NFC unit only replaces a simple switch or button on the vehicle, e.g. B. if the control device has a defect to open or close the door or flap by manually pressing the switch or button. Overall, the use of the existing system improves comfort and safety when accessing the vehicle. There is also no need for additional space in the vehicle for the arrangement of the NFC sensor, since the NFC sensor is not required as an additional component.

The term: “door” is to be understood in the context of the invention as a vehicle door, flap, sliding door, engine compartment hood or a movable part on the vehicle which can be opened and closed by a lock. In the present text, the term: “mobile device” is also used for a mobile ID transmitter, a cellular phone, smartphone or tablet or the like. The mobile device is usually able to transmit the identification code by radio for unlocking or locking and / or for opening and closing the doors on the vehicle. Furthermore, the mobile device ideally has an NFC interface for (contactless) data exchange with the NFC unit of the vehicle. “NFC” is understood to mean near-field communication for the contactless exchange of data by electromagnetic induction (in particular with passive HF RFID tags according to ISO / IEC 14443 or ISO / IEC 15693). Here, data is exchanged at a short distance, preferably less than 10 cm, preferably less than 5 cm, particularly preferably less than 3 cm.

Appropriately, the NFC unit can either be directly connected to the security device in terms of data technology or indirectly via the existing control device. The data transfer from the NFC unit to the security device can also take place via an existing bus system in the vehicle. It is also conceivable that the safety device, the control device and the NFC unit are connected in terms of data technology via the existing bus system. Instead of a data line between the devices, radio transmission, which is preferably coded, can also be provided.

So that the NFC sensor can now be formed by the first sensor, it is conceivable that a switching device with at least one switch is present, whereby the capacitive sensor element can be connected to control electronics of the control device on the one hand and to the NFC unit on the other. The switching device preferably connects the capacitive sensor element either to the control electronics of the control device or to the NFC unit in terms of control technology. Thus either the first sensor, in particular the capacitive sensor element, is connected to the control electronics or to the NFC unit. The use of the switching device means that the first sensor is used sequentially (that is, in a chronologically offset order) as a capacitive sensor element and as an NFC sensor. This means there is no need for an additional NFC sensor. Since the arrangement of the first sensor is preferably provided in the rear area of the vehicle, it is also easy for an operator to send out the NFC signal through his mobile device. A marker for stopping the mobile device can expediently be present for the transmission of the NFC signal on the vehicle.

It is also conceivable that the switch of the switching device is formed as a semiconductor switching element. It is advantageous here if the semiconductor switching element is formed from at least one (or more) FETs, in particular MOSFETs, and / or a diode. Extremely short switching cycles can be generated by using one or more semiconductor switching elements as switches. In addition, such semiconductor switching elements operate without wear. Furthermore, the energy requirement when using semiconductor switching elements in the form of FET or MOSFET is particularly low.

It is also possible for the switching device to be designed as an at least two-pole switch. In this way, every existing pole or every existing line of the first sensor or the NFC sensor can be switched freely (meaning arbitrary). It is also conceivable that a switch is used which simultaneously switches one or more poles or lines (with the same effect). In addition, there can also be several switches in the switching device in order to connect the first sensor either to the control electronics or to the NFC unit. The switching device itself can be arranged within the control device, in particular a housing of the control device. This enables a particularly compact design to be achieved. The NFC unit can also be accommodated in a housing with the control device. This can be electrically or electronically connected to the control device only via the switching device.

In order to provide easy access to the vehicle in an emergency, it is conceivable that switching (polling) between the control electronics of the control device and the NFC unit, in particular by the switching device (in particular the switch or switches), every 10 to 100 ms, preferably takes place every 20 to 70 ms, preferably every 30 to 40 ms. Thanks to the short switching cycles of the switching device, the operator has no loss of comfort if he wants to open or close and / or unlock or lock the vehicle in an emergency using his mobile device (with the NFC signal).

• - einer niedrigen Bordspannung des Fahrzeuges
• - einem Fehlsignal beim ersten Sensor
• - einem Tastensignal am mobilen Gerät oder Fahrzeug
• - einer Zeitspanne T1 nach einer Verriegelung der Sicherheitsvorrichtung
• - einer Annäherung eines Objekts ans Fahrzeug

generierbar ist.So that the energy requirement (of the system) is further reduced, it can be provided that switching (polling) between the control electronics of the control device and the NFC unit is initiated by an initial signal, the initial signal in particular depending on at least

• - a low on-board voltage of the vehicle
• - a false signal at the first sensor
• - a button signal on the mobile device or vehicle
• a time period T1 after the safety device has been locked
• - an approach of an object to the vehicle

can be generated.

Thus, the switching device does not generally switch the first sensor between the control electronics and the NFC unit, but only when the initial signal is present. For this purpose, the control electronics can communicate with other systems in the vehicle via the bus system in order to generate the initial signal only when the required dependency is reached. The initial signal can also be transmitted to the control electronics on the vehicle side through the bus system.

It is also conceivable that the capacitive sensor element has at least one measuring part and one control part, which are preferably galvanically connected to one another, in particular by a contact point (at the opposite end of the plug), the measuring part being used to form the capacitance and the control part being used to check the function of the capacitive sensor element is suitable. Here, the measuring part and the control part can form a common electrical path. A capacitive sensor element configured in this way has improved safety, since the contact between the sensor element and the control electronics can be easily checked on the basis of a short-circuit test (through the electrical path). The sensor element can also be checked for its general functionality in a simple manner - via the short-circuit test or a resistance measurement. A plug check for the sensor, in particular the capacitive sensor element, is thus also possible.

At least the measurement data from the first sensor can be evaluated directly via a measurement value unit. The measured value unit can be designed as an A / D converter. The measured value unit is preferably connected between the respective sensor and the control electronics and supplies, preferably digital, measurement data to the control electronics. The measured value unit can be able to evaluate each capacitive sensor element individually and to forward it to the control electronics.

The mentioned control device of the system according to the invention comprises at least the control electronics as well as a voltage source or voltage regulator provided for this purpose and possibly an interface for the bus system of the vehicle. The aforementioned measurement value unit can also belong to the control device.

It is preferably provided here that the measuring part of the capacitive sensor element is designed as a metal strip and / or wire mesh and / or wire. The capacitive measuring field of the sensor element can be enlarged by the metal strip or the wire mesh. The wire represents a particularly simple variant for the construction of the capacitive measuring field of the sensor element. It is also conceivable that the control part of the capacitive sensor element is designed as a metal strip and / or wire. This simplifies the production of the capacitive sensor element if the measuring part and the control part are made of the same material and / or of the same construction. Furthermore, it is sufficient for the desired property of the capacitive sensor element if the control part is a wire is designed. The galvanic connection between the measuring part and the control part can be established through the contact point, in particular at the opposite end of the plug of the sensor element. The contact point can be designed as a soldering, pressing and / or welding point.

It can particularly preferably be provided that the capacitive sensor element is designed as a coax cable with an outer wire mesh and an inner wire, the inner wire being galvanically connected to the wire mesh, in particular through a contact point, preferably at one end of the coax cable is. By using the coax cable, a particularly technically elegant variant for the capacitive sensor element is possible. In addition, the coax cable can be purchased in bulk or by the meter and can therefore be implemented cost-effectively as a capacitive sensor element. The contact point can also be easily produced by means of a crimping process, welding process or a soldering process. It is also conceivable that the measuring part of the capacitive sensor element is formed by the wire mesh and the control part of the capacitive sensor element is formed by the inner wire (of the coax cable). Since the coax cable is also insulated from the outside, a simple and safe arrangement on the vehicle is easy to implement. The existing contact point at the outer end of the capacitive sensor element can be protected against moisture and contamination with a cap or an insulated element.

In order to optimally design the functionality of the first sensor element, it can be provided that an area of the capacitive sensor element is designed like a coil, the control part preferably being designed like a coil, and / or that the coil-like area of the capacitive sensor element is designed without shielding. It is conceivable here that the coil-like area of the capacitive sensor element is designed as a winding, in particular a 3-dimensional coil, or as a flat coil. If the control part is made of wire, it is particularly easy to arrange a winding in the middle area (viewed along the length of the sensor element). In the case of a measuring part made of metal strips, it can be easier in the context of production to provide a flat coil for the control part. This means that the control part and the flat coil can be produced in one production step. The length of the coil-like area is preferably less than 1/5, preferably less than 1/8, and particularly preferably less than 1/10 of the length of the measuring part of the capacitive sensor element and is advantageously arranged in the center. The length of the coil-like area can be less than 10 cm, preferably less than 8 cm. The length of the measuring part is expediently equal to the length of the control part.

It is also conceivable within the scope of the invention that the control device comprises the control electronics and the NFC unit. The NFC unit can be electrically isolated from a voltage source for the control electronics. This makes it possible for the NFC unit to also function when the control device itself does not have any electrical energy. It is also conceivable that the NFC unit is also supplied by the voltage source for the control electronics. The structure of the system according to the invention can hereby be simplified. If, in an emergency, there is sufficient electrical energy in the vehicle for the system according to the invention, the functional reliability of the system is increased.

To in an emergency - z. B. in the event of a power failure - to ensure the proper functioning of the NFC unit, it is conceivable that the NFC unit is designed without energy sources, wherein preferably electrical energy can be transmitted from the mobile device to the NFC unit. A particularly comfortable and safe system is achieved by this measure.

In order to achieve a compact design of the system, it can be provided that the control device, the control electronics and the NFC unit are accommodated in a common housing. Ideally, the housing is sealed watertight and dirt-tight so that the internal components are housed in a protected manner. Furthermore, it is preferably conceivable that the first sensor (as well as all other external sensors) are connected to the control device via a plug connection. This means that assembly and repair work on the system can also be carried out particularly easily. Furthermore, the switching device can also be arranged in or in the housing of the control device, whereby the space requirement for the system can be further reduced.

Ideally, the first sensor has at least two capacitive sensor elements. This makes it possible to detect not only the approach of an object by measurement, but also a movement pattern of the object (in front of or in the area of the first sensor). The movement pattern detected by measurement can be compared with a predefined movement pattern (e.g. in the control electronics) and, in the event of a positive comparison, generate a trigger signal for the safety device. As soon as the trigger signal from the system or the control device is present at the safety device and, if necessary, there is also a release by the correct identification code (from the mobile device), the desired function of the safety device can be triggered. It is also possible that preferably both capacitive sensor element are arranged spatially one above the other (on the vehicle), whereby the movement pattern of the object can be easily detected by measurement. For example, the first sensor can be arranged in the tailgate area, wherein the first capacitive sensor element can be arranged above the second capacitive sensor element. The two capacitive sensor elements expediently run parallel to one another. This first sensor can automatically open or close the tailgate. For this purpose, an electric lock can be provided for the tailgate, which can be controlled by the safety device (or directly by the control device).

In order to improve the application possibilities of the system and the comfort on the vehicle, further sensors can be provided for the first sensor. For example, a second sensor with at least one capacitive sensor element, preferably two capacitive sensor elements, can be present. This second sensor can be in the side area of the vehicle, for. B. be arranged below a sliding side door or below a rear side door on the vehicle, especially in the door sill area. The driver's door or the front passenger's door can also be controlled by the second sensor or a second sensor of the same construction. It is also conceivable that a third sensor is used, which is designed as an optical sensor and can detect a movement pattern of an object by means of an optical measurement. This optical sensor can be used in the area of the B-pillar (at window height) on the vehicle to control the front and / or rear doors. By using the multiple sensors (first, second and / or third sensor) in the existing system, a movement of the operator around the vehicle can also be detected.

Furthermore, the invention is also directed to a vehicle with the system according to the invention for triggering at least one function of a safety device. The term “vehicle” is understood to mean a motor vehicle, truck, excavator, crane, boat, ship and aircraft. The invention is expediently directed to a motor vehicle with an access control system and / or a central locking system. It can be provided here that the first sensor is arranged in the tailgate area of the motor vehicle, in particular in the bumper area, whereby a tailgate can be actuated, in particular if a movement pattern of the object behind the vehicle can be measured by the first sensor. Another (second or third) sensor can be arranged in the side area of the vehicle. The vehicle according to the invention thus benefits from the same technical advantages as with the system according to the invention.

Furthermore, the present invention is also directed to a method for operating a system for triggering at least one function of a safety device, the safety device being connected to a control device in terms of control technology, the control device being connected to at least one first sensor, and the first sensor being connected to at least one Has capacitive sensor element, wherein a change in capacitance due to a movement of an object, in particular an operator, can be registered and transmitted to the control device through the capacitive sensor element, and wherein an NFC unit with an NFC sensor is present, which is connected to the safety device in terms of control technology , and the NFC sensor is suitable for data exchange with a mobile device, whereby an identification code can be transmitted. In this method it is provided that the first sensor, in particular the capacitive sensor element, is operated as an NFC sensor. As has already been mentioned, the method according to the invention can be carried out with the system according to the invention. It is also conceivable that the first sensor, in particular the capacitive sensor element, is operated to measure a capacitance or as an NFC sensor by switching over. The technical advantages of the system according to the invention and the vehicle according to the invention therefore also apply to the present method.

• 1 eine schematische Draufsicht auf ein Fahrzeug mit einem erfindungsgemäßen System,
• 2 eine schematische Seitenansicht auf das Fahrzeug mit einem vergleichbaren System aus 1,
• 3 eine schematische Darstellung des erfindungsgemäßen Systems mit einer Umschalteinrichtung und einer NFC-Einheit innerhalb des Gehäuses der Steuervorrichtung,
• 4 eine weitere schematische Darstellung eines vergleichbaren Systems aus 4 mit einer Umschalteinrichtung innerhalb des Gehäuses der Steuervorrichtung und einer separaten NFC-Einheit,
• 5 schematische Ansichten für drei verschiedene Ausgestaltungen eines ersten kapazitiven Sensorelements des ersten Sensors und
• 6 schematischer Verfahrensablauf für das Verfahren.

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. It shows:

• 1 a schematic top view of a vehicle with a system according to the invention,
• 2 a schematic side view of the vehicle with a comparable system 1 ,
• 3 a schematic representation of the system according to the invention with a switching device and an NFC unit within the housing of the control device,
• 4th a further schematic representation of a comparable system 4th with a switching device within the housing of the control device and a separate NFC unit,
• 5 schematic views for three different configurations of a first capacitive sensor element of the first sensor and FIG
• 6th schematic process flow for the procedure.

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

In 1 and 2 is the system according to the invention 100 for a vehicle 60 for triggering at least one function of a safety device 50 shown on the one hand in plan view and on the other hand in side view. The system according to the invention 100 has a control device 10 on that with a first sensor 11 control technology, z. B. via a data line 51 or control line 51 , connected is. The system 100 increases the convenience of accessing the vehicle 60 , being there doors 61 , Sliding doors 61 , and / or tailgates 61 or the like can open and close automatically. For this purpose you can use electric locks 63 on the doors 61 be provided. These electric locks 63 will ultimately be through the system 100 controlled automatically. In addition, on the doors 61 also door handles 62 be available through which a manual access to the vehicle 60 is made possible.

The safety device 50 from the vehicle 60 is designed as an access control system and / or as a central locking system. Thus is the safety device 50 in the present case with the electrical locks in terms of control technology 63 from the doors 61 connected. The central locking system is locked and unlocked using the aforementioned mobile device 80 a server 90 carries with him. Via this mobile device 80 can send an identification code by radio to the security device 50 be replaced. If the correct identification code is available, the central locking system can be unlocked. So that the door 61 or the tailgate 61 opens automatically, the operator must 90 with an object 90.1 , in particular his leg, arm, hand, head or the like, a movement pattern in front of the sensors 11 , 12th and or 13th of the system 100 exercise. In the rear of the vehicle 60 can the operator 90 by kicking his leg 90.1 generate a trigger signal on the system as a movement pattern.

The first sensor 11 has at least one capacitive sensor element 11.1 on, which means a capacitive change due to a movement or approach of the object 90.1 is measurable. To get a pattern of movement from the object 90.1 To be able to detect it by measurement, it is expedient that the first sensor 11 also another capacitive sensor element 11.2 having. The first capacitive sensor element is preferably 11.1 above the second capacitive sensor element 11.2 at the vehicle 60 arranged. The two capacitive sensor elements 11.1 and 11.2 form the first sensor 11 .

As from the 1 and 2 can also be seen in the side area of the vehicle 60 additional sensors 12th , 13th arranged. The second sensor 12th is also available as a capacitive sensor with a first and a second capacitive sensor element 12.1 and 12.2 designed. The second sensor 12th is in the side area of the vehicle 60 , preferably below the doors 61 , arranged. Through this or these sensors 12th can also open the side doors 61 automatically from the system 100 actuate. The third sensor 13th is an optical sensor that detects the movement pattern of the object 90.1 purely optically recorded. As in 2 is visible is the third sensor 13th for example in the area of the B-pillar above the door panel of the doors 61 arranged in the area of the window. This sensor 13th can easily be done by hand (as an object 90.1 ) of the user 90 being controlled. The hand can be used as a movement pattern 90.1 for example, perform a pivoting movement or a pulling movement.

In the 1 it can be seen that the sensors 11 , 12th , 13th via the data lines 51 with the control device 10 , especially the control electronics 14th are connected. Furthermore, the control device 10 also via a data line 51 , which can also consist of a bus system, with the safety device 50 connected in terms of control technology. Also a designated NFC unit 22nd is with a data line 51 - in the present case - with the safety device 50 connected in terms of control technology. The NFC unit 22nd can also be used directly with the control device 10 be connected or even integrated into it.

How continue from the 1 and 2 can be seen, forms the first sensor element 11 , especially the capacitive sensor element 11.1 , an NFC sensor 23 . At this point it should also be mentioned that basically the second sensor 12th identical to the first sensor 11 can be designed.

In the 3 Figure 3 is a schematic representation of the system of the present invention 100 shown. Here are the control device 10 who have favourited the electronics unit 14th includes, with a switching device 19th and the NFC unit 22nd and, if applicable, a unit of measurement 17th in one housing 24 housed. The control device further comprises 10 also a voltage source 15th or a voltage regulator 15th as well as an interface 16 For a bus system from the vehicle 60 . Like in the 3 visible is the NFC unit 22nd electrically or electronically only via the switching device 19th with the control device 10 connected. In the present case, the NFC unit is working 22nd regardless of the voltage source 15th the control device 10 .

In the case 24 is also the switching device 19th present the at least two switches 20th , 21 having. The two switches are expedient 20th , 21 designed as semiconductor switching elements and ensure fast switching of the first capacitive sensor element 11.1 to the NFC unit 22nd or to the control electronics 14th . In the 3 is a first switching state I. from the switching device 19th shown. Here is the capacitive sensor element 11.1 electrically with the control electronics 14th interconnected. The two sensors 11 , 12th are with their respective sensor elements 11.1 , 11.2 as 12.1 , 12.2 via a plug connection 18th with the control device 10 , especially the control electronics 14th connected. There is also a data line between the control electronics 14th and the switching device 19th indicated by dashed lines in the figure.

In the 3 and 4th use coax cables as sensor elements 11.1 , 11.2 as 12.1 , 12.2 used. The sensor elements are at one end with the switching device 19th connected and at the other end is a contact point 11.1c provided that a measuring part 11 .1a and a control part 11.1b galvanically connects to each other. This measure enables a short-circuit measurement or a resistance measurement on the sensor element 11.1 , 11.2 as 12.1 , 12.2 be carried out to check the functionality. The measuring part 11 .1a is clearly formed by the outer wire mesh of the coax cable and the control part 11.1b through the inner wire in the coax cable.

The 4th differs from that 3 by having the NFC unit 22nd not inside the case 24 of the system 100 is arranged. Also the switching status of the deflection device 19th has been changed and now has the second switching state II on. This is now the first capacitive sensor element 11.1 (from the first sensor 11 ) with the NFC unit 22nd connected and now forms the NFC sensor 23 . The system according to the invention is in this state 100 able to transfer data to the mobile device via the NFC interface 80 to exchange. The NFC unit shown 22nd can itself directly with a bus system from the vehicle 60 be connected. At this point it should also be mentioned that the second sensor 11 via another switching device 19th as an NFC sensor 22nd can serve.

In the 5 are three different configurations of the capacitive sensor element 11.1 shown. In the top configuration, the capacitive sensor element has 11.1 a measuring part 11 .1a, which consists of a metal foil or a metal strip. The control part 11.1b , which has a contact point 11.1c is connected at the end to the metal strip, is designed as a wire. At the other end of the capacitive sensor element 11.1 is this, preferably via a plug connection 18th , with the switching device 19th connected (not explicitly shown). In the 5 the wire of the control part is designed to be more or less linear.

In the middle configuration of the capacitive sensor element 11.1 out 5 instructs the control part 11.1b a coil-like area 11 .1d on. The wire of the control part is in this area11.1d 11.1b wound into a spool. This coil is used to facilitate data transmission between the mobile device 80 and the NFC unit 22nd to improve.

In the lower configuration of the capacitive sensor element 11.1 out 5 instructs the control part 11.1b also a coil-like area 11 .1d on. In this area 11 .1d a printed coil is used, which essentially lies in one plane. The control part is in this embodiment 11.1b also as a linear metal strip, just like the measuring part 11 .1a, designed. This allows this sensor element 11.1 particularly easy to manufacture.

In the 6th is the switching method between the steps 501 and 502 shown. In step 501 is the first switching state I. achieved, the first capacitive sensor element 11.1 is used for the original capacitance measurement. In step 502 is the second switching state II present, now the first capacitive sensor element 11.1 as an NFC sensor 23 serves and a data exchange between the mobile device 80 and the NFC unit 22nd enables.

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.

List of reference symbols

10

Control device

11

first sensor

11.1

capacitive sensor element

11.1 a

Measuring part

11.1b

Control part

11.1c

Contact point

11.1 d

coil-like area

11.2

capacitive sensor element

12th

second sensor

12.1

capacitive sensor element

12.2

capacitive sensor element

13th

third sensor, especially optical

14th

Control electronics

15th

Voltage source

16

Interface for bus system

17th

Measurement unit, especially A / D converter

18th

Connector

19th

Switching device

20th

first switch

20.1

first semiconductor switching element

21

second switch

21.1

second semiconductor switching element

22nd

NFC unit

23

NFC sensor

24

casing

50

Safety device

51

Data line, control line

60

vehicle

61

Door, tailgate

62

Door handle

63

electric lock

80

mobile device, in particular ID transmitter or mobile phone

90

operator

90.1

Object, especially leg of 90

100

system

501

Step 1: first sensor element as cap. Sensor element 11.1

502

Step 1: first sensor element as NFC sensor 15

I.

first switching state

II.

second switching state

Claims (20)

System (100) for a vehicle (60) for triggering at least one function of a safety device (50), the safety device (50) being control-technically connected to a control device (10), the control device (10) having at least one first sensor (11 ) is connected, and the first sensor (11) has at least one capacitive sensor element (11.1), with the capacitive sensor element (11.1) registering a change in capacitance due to a movement of an object (90.1), in particular an operator (90), which can be registered and transmitted to the Control device (10) can be transmitted, and wherein an NFC unit (22) with an NFC sensor (23) is present, which is connected to the safety device (50) in terms of control technology, and the NFC sensor (23) for data exchange with a mobile device (80), whereby an identification code can be transmitted, characterized in that the NFC sensor (23) by the first sensor (11), in particular the capacitive it sensor element (11.1) is formed. System (100) according to Claim 1 , characterized in that a switching device (19) with at least one switch (20) is present, whereby the capacitive sensor element (11.1) on the one hand with control electronics (14) of the control device (10) and on the other hand with the NFC unit (22) in terms of control can be connected, the switching device (19) preferably connecting the capacitive sensor element (11.1) either to the control electronics (14) of the control device (10) or to the NFC unit (22) in terms of control technology. System (100) according to Claim 1 or 2 , characterized in that the switch (20) of the switching device (19) is formed as a semiconductor switching element (20.1), the semiconductor switching element (20.1) preferably being formed from at least one FET, in particular MOSFET, and / or a diode. System (100) according to one of the preceding claims, characterized in that the switching device (19) is designed as an at least two-pole switch (20). System (100) according to one of the preceding claims, characterized in that switching (polling) between control electronics (14) of the control device (10) and NFC unit (22), in particular by the switching device (19), every 10 to 100 ms , preferably every 20 to 70 ms, preferably every 30 to 40 ms. System (100) according to one of the preceding claims, characterized in that switching (polling) between control electronics (14) of the control device (10) and NFC unit (22) is carried out an initial signal is initiated, in particular the initial signal as a function of at least - a low on-board voltage of the vehicle (60) - a false signal at the first sensor - a key signal on the mobile device (80) or vehicle (60) - a time period T1 after locking the Safety device (50) - an approach of an object (90.1) to the vehicle (60) can be generated. System (100) according to one of the preceding claims, characterized in that the capacitive sensor element (11.1) has at least one measuring part (11.1a) and one control part (11.11b), which are preferably galvanically, in particular by a contact point (11.1c), with one another are connected, the measuring part (11.1 a) is used to form the capacitance and the control part (11.11b) is suitable for checking the function of the capacitive sensor element (11.1), the measuring part (11.1a) and the control part (11.11b) preferably having a common form electrical path. System (100) according to one of the preceding claims, characterized in that the measuring part (11.1a) of the capacitive sensor element (11.1) is designed as a metal strip and / or wire mesh and / or wire, and / or the control part (11.1b) of the capacitive Sensor element (11.1) is designed as a metal strip and / or wire. System (100) according to one of the preceding claims, characterized in that the capacitive sensor element (11.1) is designed as a coax cable with an outer wire mesh and an inner wire, the inner wire preferably at one end of the coax cable with the Wire mesh, in particular by a contact point (11.1c), is galvanically connected. System (100) according to Claim 9 , characterized in that the measuring part (11.1a) of the capacitive sensor element (11.1) is formed by the wire mesh and the control part (11.1b) of the capacitive sensor element (11.1) is formed by the inner wire. System (100) according to one of the preceding claims, characterized in that an area (11.1d) of the capacitive sensor element (11.1) is designed like a coil, the control part (11.1b) preferably being designed like a coil, and / or that the coil-like area ( 11.1 d) of the capacitive sensor element (11.1) is designed without shielding, and / or that the coil-like area (11.1d) of the capacitive sensor element (11.1) is designed as a winding, in particular a 3-dimensional winding, or as a flat coil. System (100) according to one of the preceding claims, characterized in that the control device (10) comprises the control electronics (14) and the NFC unit (22), wherein the NFC unit (22) is preferably electrically isolated from a voltage source (15 ) for the control electronics (14). System (100) according to one of the preceding claims, characterized in that the NFC unit (22) is designed without energy sources, wherein preferably electrical energy can be transmitted from the mobile device (80) to the NFC unit (22). System (100) according to one of the preceding claims, characterized in that the control device (10), the control electronics (14) and the NFC unit are accommodated in a housing (24), and / or the first sensor (11) via a Plug connection (18) is connected to the control device (10) in terms of control technology, and / or the switching device (19) is also arranged in a housing (24) of the control device (10). System (100) according to one of the preceding claims, characterized in that the first sensor (11) has at least two capacitive sensor elements (11.1, 11.2), the two capacitive sensor elements (11.1, 11.2) preferably being arranged spatially one above the other, creating a movement pattern of the object (90.1) can be measured. System (100) according to one of the preceding claims, characterized in that the control device (10) is connected to at least one second sensor (12), and preferably the second sensor (12) is designed as a capacitive sensor element (12.1) and / or an optical sensor element is. Vehicle (60) with a system (100) for triggering at least one function of a safety device (50) according to one of the preceding claims. Vehicle (60) according to the preceding claim, characterized in that the first sensor (11.1) is arranged in the tailgate area, in particular in the bumper area, whereby a tailgate (61) can be actuated, in particular when a movement pattern of the object (90.1) behind the vehicle (60) is measured by the first sensor ( 11) can be detected, and / or that a further sensor (12, 13) is arranged in the side area of the vehicle (60). Method for operating a system (100) for triggering at least one function of a safety device (50), the safety device (50) being connected to a control device (10) in terms of control technology, the control device (10) being connected to at least one first sensor (11) and the first sensor (11) has at least one capacitive sensor element (11.1), with the capacitive sensor element (11.1) registering a change in capacitance caused by a movement of an object (90.1), in particular an operator (90), and being transmitted to the control device ( 10) can be transmitted, and there is an NFC unit (22) with an NFC sensor (23), which is connected to the safety device (50) for control purposes, and the NFC sensor (23) for data exchange with a mobile device Device (80) is suitable, whereby an identification code can be transmitted, characterized in that the first sensor (11), in particular the capacitive sensor element ( 11.1), is operated as an NFC sensor (23). Method for operating a system (100) according to Claim 19 , characterized in that the first sensor (11), in particular the capacitive sensor element (11.1), is operated to measure a capacitance or as an NFC sensor (15).

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