DE102013217718A1 - Charging station for inductive energy transfer and method for positioning an inductive energy transfer device - Google Patents

Abstract

The present invention provides a charging station for inductive power transmission to a motor vehicle, having a transmitting coil arranged in the bottom region of the charging station, and a pilot signal output device which is adapted to output a first optical pilot signal in a first solid angle and a second optical pilot signal in one of the first Solid angle to output different second solid angle. With this charging station, a method for positioning an inductive power transmission device can be implemented in which first and second optical signals are output from the Leitsignalausgabeeinrichtung in first and second solid angles, respectively, of first and second Leitsignalempfangseinrichtungen on a vehicle with a receiving coil for inductive Power transmission are detected, to control an automatic parking assistance system of the vehicle based on a difference of the detected first and second optical guidance signals for automatic parking of the vehicle, so that the receiving coil is positioned for inductive energy transmission relative to the transmitting coil.

Description

The present invention relates to a charging station for the inductive energy transfer from a transmitting coil of the charging station to a receiving coil spaced from the transmitting coil and a method for positioning an inductive energy transfer device, in particular for positioning a receiving coil with respect to a transmitting coil of an inductive energy transfer device.

State of the art

Electric vehicles usually have an electrical energy storage, such as a traction battery that provides the electrical energy for propulsion. If this electrical energy store is completely or partially discharged, then the electric vehicle has to control a charging station, at which the energy store can be recharged. So far, it is customary for this purpose that the electric vehicle is connected to the charging station by means of a cable connection at such a charging station. This connection must usually be made manually by a user. It is also necessary that charging station and electric vehicle have a mutually corresponding connection system.

There are also known wireless charging systems for electric vehicles. For this purpose, an electric vehicle is placed over a coil. This coil emits a magnetic alternating field. The alternating magnetic field is absorbed by a receiving coil within the vehicle and converted into electrical energy. By means of this electrical energy, a traction battery of the vehicle can then be charged. The publication DE 10 2011 010 049 A1 discloses such a system for charging a vehicle battery, in which the energy is transmitted inductively.

The efficiency of the energy transfer between the transmitting coil and the receiving coil depends strongly on the relative position of the (mobile) receiving coil in the vehicle with respect to the (fixedly mounted) transmitting coil in a charging station. The efficiency depends on the coupling factor of the coils with each other or on the size of the magnetic stray field.

The publication WO 2012/058466 A1 discloses a coil positioning of a vehicle-mounted power transmission device by a mechanical positioning device in the base of the vehicle. The publication JP 2011 217 452 A discloses a positioning of receiver coils of an inductive power transmission device in the license plate area of vehicles. The publication CN 201 966 671 U discloses a positioning of receiver coils of an inductive power transmission device on the vehicle roof. The publication US 2012/0098483 A1 discloses a position determination and an automatic parking function using in-vehicle antennas for navigating the vehicle to a loading position with respect to an inductive power transmission device. The pamphlets DE 10 2010 053 058 A1 . JP 2012 005 308 . DE 10 2009 033 239 A1 and DE 10 2009 033 237 A1 each disclose additional positioning coils in vehicles to increase the positioning tolerance to inductive power transmission devices.

However, there is a need for inductive power transfer solutions which can improve the positioning of the transmit and receive coils relative to each other.

Disclosure of the invention

According to one aspect, the present invention provides a charging station for inductive power transmission to a motor vehicle, having a transmitting coil arranged in the bottom area of the charging station, and a pilot signal output device which is designed to output a first optical pilot signal in a first solid angle and a second optical pilot signal in one output from the first solid angle different second solid angle.

According to another aspect, the present invention provides a method of positioning an inductive power transmission device, comprising the steps of detecting a first optical pilot signal output from a pilot signal output device of a charging station having a transmission coil for inductive power transmission in a first solid angle, with a first pilot signal receiving device, which is mounted on a vehicle having a receiving coil for inductive power transmission, detecting a second optical pilot signal, which is output from a Leitsignalausgabeeinrichtung the charging station in a second solid angle, with a second Leitsignalempfangseinrichtung mounted on the vehicle, the driving of an automatic parking assistance system the vehicle on the basis of a difference of the detected first and second optical guidance signals, and the automatic parking of the vehicle using the automatic Parking assistance system, so that the receiving coil is positioned for inductive energy transmission relative to the transmitting coil.

It is an idea of the present invention, at a charging station with an inductive Energy transmission device to output control signals that can be optically detected by corresponding receiving devices of a vehicle. In this case, the guide signals have a directional characteristic and cover adjacent solid angles, so that a positioning algorithm in the vehicle can be carried out on the basis of the differently detected control signals. For this purpose, for example, the parking assistance system of the vehicle can be used that enables a positioning mechanism of the vehicle over the transmitting coil of the inductive energy transfer device via a control mechanism along the two guide signals, so that a receiving coil of the vehicle as well as possible and positioned with optimal coupling factor for the inductive energy transfer via the transmitting coil becomes.

A significant advantage of the present invention is that the positioning of the transmitting and receiving coils to each other can be significantly improved, without the need for elaborate components must be provided in the vehicle. For example, already existing systems such as parking assistance systems with associated parking assistance cameras of the vehicle can be used to perform the coil positioning can. This enables a very cost-effective implementation of a positioning system for inductive power transmission devices in vehicles.

In addition, the comfort for the vehicle driver is increased, which can save time by the accelerated parking operation and on the other hand costs by the improved charging efficiency by the automatic positioning of the vehicle over the transmitting coil on the one hand.

Additional sensor systems can also be saved, which eliminates additional disturbing influences on the electromagnetic compatibility of the inductive energy transfer device. In addition, the positioning and foreign object detection methods are reliable, fast and efficient.

According to an embodiment of the charging station, the charging station may further comprise a coil control device, which is connectable to a power network, and which is adapted to supply the transmitting coil with electric current.

According to a further embodiment of the charging station, the charging station can furthermore have a communication device which is coupled to the coil control device and which is designed to transmit a position and / or identification radio signal wirelessly.

According to a further embodiment of the charging station, the first optical guide signal light may have a different wavelength from the wavelength of the light of the second optical guide signal. According to an alternative embodiment, the first and the second optical guide signal may each have a pulsed light signal whose pulse frequencies are different. As a result, the two control signals can be distinguished from one another in receiving devices of the vehicle and, depending on the received detection signals, control algorithms for a direction control can be implemented.

According to a further embodiment of the charging station, the first solid angle and the second solid angle can have no overlap and adjoin one another. This advantageously allows an optimal directional characteristic and a compact arrangement of the Leitsignalempfangseinrichtungen in the vehicle

Further features and advantages of embodiments of the invention will become apparent from the following description with reference to the accompanying drawings.

Brief description of the drawings

Show it:

1 a schematic representation of a plan view of a vehicle with an inductive power transmission device in the vicinity of a charging station according to an embodiment of the invention;

2 a schematic representation of a cross-sectional view of an inductive power transmission device according to another embodiment of the invention;

3 a schematic representation of a partial view of a charging station with a transmitting coil according to another embodiment of the invention; and

4 a schematic representation of a method for positioning an inductive power transmission device according to another embodiment of the invention.

The drawings shown in the figures are partly perspective views of elements that are not necessarily drawn to scale for the sake of clarity. Like reference numerals generally designate like or equivalent components.

1 shows a vehicle 20 that over an inductive charging station 100 can be turned off or should. The vehicle 20 especially one be electrically operated vehicle, such as an electric car, a hybrid vehicle or other vehicle with an electric and rechargeable energy storage. The vehicle 20 includes a receiver coil 21 which, for example, in an underbody of the vehicle 20 is arranged so that the coil plane is parallel to the ground or driving surface.

The vehicle 20 is for inductive energy transfer via a transmitting coil 10 the charging station 100 so turn off the receiver coil 21 of the vehicle 20 above the transmitting coil 10 is arranged. When the transmission coil 10 in the bottom of the charging station 100 is arranged, it is due to the required ground clearance of the vehicle 20 necessary that between the transmitting coil 10 and the bottom of the vehicle 20 in which the receiver coil 21 is located, a gap with an air gap.

After the vehicle 20 so turned off that the receiving coil 21 in the vehicle 20 above the transmitter coil 10 can, charging the electrical energy storage of the vehicle 20 , For example, a traction battery begin. For this purpose, the transmission coil generates 10 a magnetic alternating field. This alternating magnetic field is from the receiving coil 21 absorbed and converted into electrical energy. The electrical energy is then via a suitable circuit for charging the electrical energy storage of the vehicle 20 to disposal.

For a return of electrical energy from the vehicle 20 in a power supply network can also reverse the coil 21 in the vehicle 20 serve as a transmitting coil that generates a magnetic field. The sink 10 in the charging station 100 then operates as a receiving coil, which receives the energy of the magnetic field and converts it into electrical energy, which can then be fed into a power grid.

Is now the vehicle 20 with the receiver coil 21 at the charging station 100 above the transmitting coil 10 turned off, so the charging of the electrical energy storage can be started. For this purpose, if necessary, initially a data connection between the vehicle 20 and the charging station 100 built up. Such a data connection may preferably be a wireless connection. For example, the connection can be made optically, for example on the basis of infrared light, by means of a radio connection, such as WLAN, GSM, Bluetooth, etc., or by means of an inductive connection between the vehicle 20 and charging station 100 , By such a data connection can first an authorization of the vehicle 20 and / or the driver. Furthermore, the exchange of vehicle-specific parameters and the transmission of parameters for a later billing of the costs are possible.

Exemplary is in 1 this one of the charging station 100 associated communication device 12 shown communicating via radio communication with a vehicle communication device 23 can communicate and thereby position and / or identification radio signals RF to the vehicle communication device 23 can transmit. For example, the position and / or identification radio signals RF may serve to extend beyond a threshold distance D, for example 2 meters to 10 meters, from the charging station 100 remote vehicle 20 about the location of the charging station 100 to inform so that the driver of the vehicle 20 is able to move to the charging station by manual driving 100 to approach.

When the vehicle 20 closer than the threshold distance D to the charging station 100 It is envisaged that optical Leitsignalempfangseinrichtungen 22 of the vehicle, for example parking assist cameras (so-called "near real cameras", NRCs), can be used to drive the vehicle 20 automatically park using a parking assistance system. It can be like in 1 shown, an optical Leitsignalempfangseinrichtung 22 at the front of the vehicle 20 be arranged. It should be understood, however, that more than one beacon receiving device 22 on the vehicle 20 may be provided and that the number and position of Leitsignalempfangseinrichtungen 22 at the vehicle 20 can vary. In addition, detection devices such as other parking assistance cameras can be used to, for example, parking marks for a rough approach to the charging station 16 the charging station 100 use, for example, on the floor applied colored or different colored lines or borders, to provide the parking assistance system with drive signals. This can be done by triangulation via corresponding distance or angle measurements of different detection devices 22 opposite the respective parking markings 16 respectively. The parking assistance system can also be equipped with steering wheel and speed control of the vehicle 20 be connected to appropriate steering and driving operations on the vehicle 20 to be able to make automatically. The parking assistance system can be the driver of the vehicle 20 inform about a possible automatic positioning, which the driver can initiate with a corresponding control command.

The optical Leitsignalempfangseinrichtungen 22 may be configured to detect and evaluate pilot signals F1 and F2 received from a pilot signal output device 11 the charging station 100 can be issued. The guide signals F1 and F2 can be, for example, optical guidance signals which comprise light of different wavelengths. For example, the guide signal F1 may comprise light in a first wavelength range, while the guide signal F2 has light in a second wavelength range different from the wavelength range of the light of the first guide signal F1. For example, the first guide signal F1 may have light of a wavelength of 905 nm, the second guide signal F2 light of a wavelength of 830 nm.

Alternatively or additionally, it may also be provided that the first and the second optical guide signal F1 or F2 each have pulsed light signals whose pulse frequencies are different. Thus, for example, the first optical guide signal F1 can be intermittently emitted with the second guide signal F2 with a double pulse frequency.

The guide signals F1 and F2 are emitted in each case at solid angles which have no or at least no appreciable overlap and adjoin one another. For example, the guide signals F1 and F2 can be emitted conically or fan-shaped, wherein the cone or fan openings of the Leitsignalausgabeeinrichtung 11 the charging station 100 towards an approaching vehicle 20 point.

The optical guidance signal receiving device 22 In this case, it can have different sensor regions which can each detect and evaluate one of the control signals F1 and F2. The sensor regions can be arranged side by side along a row of sensors, so that the first guide signal F1 from a first sensor region and the second guide signal F2 from a second sensor region of the optical Leitsignalempfangseinrichtung 22 can be detected.

A detailed view of the inductive energy transfer device with the in the vehicle floor 24 arranged receiving coil 21 as well as arranged in the bottom of the charging station transmitting coil 10 is in 2 shown. The vehicle floor 24 can in particular a as in 1 illustrated vehicle 20 and the transmitting coil 10 especially one like in 1 illustrated charging station 100 be assigned.

The transmitting coil 10 is via a control circuit 14 with a power supply network 15a . 15b coupled. The control circuit 14 is for communication with the vehicle with the communication device 12 connected. The communication device 12 also has an antenna 13 for wireless communication with the vehicle communication device 23 on, in turn, a corresponding antenna 24 having.

The receiver coil 21 is in turn with a charging circuit 25 in the vehicle 20 connected to the vehicle communication device 23 is coupled. The charging circuit 25 can also have a suitable control device, the charging processes and the energy transfer between the transmitting coil 10 and the receiving coil 21 monitors and controls.

Optimal positioning of the receiver coil 21 above the transmitting coil 10 requires a relatively accurate positioning in a positioning region R, in which the electrical coil parameters such as inductance, quality, resistance, resonance frequency ensure the highest possible coupling factor between the coils. In order to be able to achieve the positioning area R as accurately as possible, the guidance signals F1 and F2 serve as guidance parameters for the automatic control of the vehicle 20 in a loading position in which the receiving coil 21 as well as possible above the transmitter coil 10 is positioned. The transmitting coil 10 itself may have one or more coil windings, which are arranged in a coil plane.

The optical guidance signal receiving device 22 is in 2 also in the subsoil 24 of the vehicle 20 arranged and on a with respect to the Leitsignalausgabeeinrichtung 11 the charging station 100 opposite side of the inductive power transmission device from transmitting coil 10 and receiver coil 21 appropriate. As a result, the Leitsignalausgabeeinrichtung 11 the guide signals F1, F2 radiate upward at an angle to the ground, so that the guide signals F1, F2 through the Leitsignalempfangseinrichtung 22 recorded and evaluated.

The Leitsignalempfangseinrichtung 22 detects the pilot signals F1 and F2 and can in the Leitsignalempfangseinrichtung 22 be evaluated for example via a comparator circuit. For this purpose, it is determined to what extent or in which sensor region of the Leitsignalempfangseinrichtung 22 the various control signals F1 and F2 are received. When the Leitsignalempfangseinrichtung 22 For example, receives only one guide signal F1, but not the guide signal F2, this indicates that the vehicle 20 not directly on the transmitter coil 10 to drive. In this case, the parking assistance system can make a direction correction until again both guidance signals F1, F2 are received to the same extent. The further the vehicle 20 from the charging station 100 is away, the larger the space area, the guide signals F1, F2 sweep because of the conical or fan-shaped solid angle. In other words, the Control tolerance or control accuracy on the basis of the detected control signals F1, F2 improves as the vehicle progresses 20 the transmitting coil 10 and thus the Leitsignalausgabeeinrichtung 11 approaches. The output angle of the guide signals F1, F2 can be dimensioned such that the transmitting coil 10 just below the receiver coil 21 if, from the Leitsignalempfangseinrichtung 22 straight no pilot signal F1, F2 is more receivable. In this case, the parking assistance system can be actuated to complete the positioning process when no more control signal F1, F2 is received.

3 shows an exemplary detail illustration of a transmitting coil 10 with assigned pilot signal output device 11 and a Leitsignalempfangseinrichtung receiving the control signals F1, F2 22 , The pilot signal output device 11 has two control signal sources 11a . 11b on that in the Leitsignalausgabeeinrichtung 11 are arranged adjacent to each other. The Leitsignalempfangseinrichtung 22 can, for example, four sensor areas 22a . 22b . 22c . 22d which are arranged along a line substantially perpendicular to the Leitsignaleinfallsrichtung. The sensor areas 22b and 22c serve in each case the detection of one of the control signals F1 and F2. The vehicle is considered to be from the right to the transmitting coil 10 almost accepted.

If in the sensor area 22b no more control signal F1 is received, it means that the vehicle 20 with unchanged direction of movement left at the transmitting coil 10 would move past. In this case, a direction correction would be made to the right by the parking assist system, up to the sensor area 22b again the pilot signal F1 can be received. Conversely, missing reception of a routing signal F2 in the sensor area 22c that the vehicle is 20 with unchanged direction of movement right at the transmitter coil 10 would move past. In this case, a directional correction would be made to the left by the parking assist system, up to the sensor area 22c again, the control signal F2 can be received. In this way, the vehicle using the parking assistance system and the detection ratio of the control signals F1, F2 optimally over the transmitting coil 10 be positioned.

In addition to the sensor areas 22b and 22c can be two further, outside sensor areas 22a and 22d be provided as a redundant sensor areas that can serve to improve the status decision on the positioning. For example, the emission angle of the guide signals F1 and F2 can be chosen such that the transmitting coil 10 exactly in the optimum range under the receiver coil 21 is positioned when from the redundant sensor areas 22a and 22d none of the control signals F1, F2 can be received more. The number, size and placement of the additional and / or redundant sensor areas can be freely selected depending on the application and the desired positioning accuracy.

4 shows a schematic representation of a method 30 for positioning an inductive energy transfer device, such as in connection with the 1 to 3 explained. The procedure 30 comprises, as a first step, detection of a first optical guidance signal F1, which is provided by a guidance signal output device 11 a charging station 100 with a transmitting coil 10 for inductive energy transmission in a first solid angle is output, with a first Leitsignalempfangseinrichtung 22b on a vehicle 20 with a receiver coil 21 is attached for inductive energy transfer. In a second step 32 there is a detection of a second optical guide signal F2, which of a Leitsignalauseinrichtung 11 the charging station 100 is output in a second solid angle, with a second Leitsignalempfangseinrichtung 22c which on the vehicle 20 is appropriate. With this information, in a third step 33 an automatic parking assistance system of the vehicle 20 be driven on the basis of a difference of the detected first and second optical guide signals F1, F2, so that in a fourth step 34 An automatic parking of the vehicle is carried out by means of the automatic parking assistance system, so that the receiving coil 21 for inductive energy transmission relative to the transmitting coil 10 is positioned.

Optionally, in step 31a the first optical guide signal F1 with a third Leitsignalempfangseinrichtung 22a which are adjacent to the first Leitsignalempfangseinrichtung 22b on the vehicle 20 is appropriate. Similarly, in one step 32a the second optical guide signal F1 with a third Leitsignalempfangseinrichtung 22d which are adjacent to the second Leitsignalempfangseinrichtung 22c on the vehicle 20 is appropriate. This can be the driving 33a the automatic parking assistance system of the vehicle 20 on the basis of a difference of the detection signals of the first and third guidance signal receiving means 22a ; 22b and a difference of the detection signals of the second and fourth Leitsignalempfangseinrichtungen 22c ; 22d respectively.

For optimal positioning, it may additionally be provided to measure or evaluate additional electrical coil parameters such as inductance, quality, resistance or resonance frequency during the parking process and to incorporate them into the adjustment of the parking assistance system. This can be done in particular by the fact that the charging station 100 at the approach of the vehicle 20 via a corresponding approach signal, which via the vehicle communication device 23 to the communication device 14 the charging station 100 is transferred, is placed in a standby mode, in which by the transmitting coil 10 For example, a magnetic field of lesser strength is generated. By measuring this magnetic field and the corresponding evaluation of the coil parameters of the receiver coil 21 in the vehicle 20 can be positioning over the captured optical contrast pattern 11a . 11b . 11c get supported.

In the present case, an inductive energy transfer from a charging station 100 to an electric vehicle 20 are the elements of the Leitsignalempfangseinrichtung 22 very strongly exposed to environmental influences. Therefore, it may be contaminated by dust or whirled dirt to the Leitsignalempfangseinrichtung 22 come. In this case would be a reliable monitoring of the gap between the transmitting coil 10 and receiver coil 21 not possible anymore. Therefore, a cleaning device can further be provided, which includes the elements of the Leitsignalempfangseinrichtung 22 cleans and thus freed of impurities. For example, such a cleaning device, the elements of Leitsignalempfangseinrichtung 22 clean with a water jet. For this purpose, the cleaning device may have one or more nozzles, from which water is emitted with a suitable pressure. Such a cleaning device may comprise, for example, a tank for a cleaning liquid, such as water, a pump and one or more nozzles. Further possibilities for cleaning the Leitsignalempfangseinrichtung 22 such as mechanical wiper blades, air jets or other suitable means are also possible.

For cleaning the Leitsignalempfangseinrichtung 22 For example, it is possible that the Leitsignalempfangseinrichtung 22 at the vehicle 20 already cleaned while driving. Thus, the Leitsignalempfangseinrichtung stands 22 when parking the vehicle 20 immediately available and can be used immediately. Alternatively, it is also possible, the Leitsignalempfangseinrichtung 22 only when parking the vehicle 20 , or to clean only when initiating the charging process.

In summary, a charging station for inductive energy transmission to a motor vehicle is disclosed, having a transmitting coil arranged in the bottom region of the charging station, and a Leitsignalausgabeeinrichtung which is adapted to output a first optical pilot signal in a first solid angle and a second optical pilot signal in one of the first solid angle output different second solid angle. With this charging station, a method for positioning an inductive power transmission device can be implemented in which first and second optical signals are output from the Leitsignalausgabeeinrichtung in first and second solid angles, respectively, of first and second Leitsignalempfangseinrichtungen on a vehicle with a receiving coil for inductive Power transmission are detected, to control an automatic parking assistance system of the vehicle based on a difference of the detected first and second optical guidance signals for automatic parking of the vehicle, so that the receiving coil is positioned for inductive energy transmission relative to the transmitting coil.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011010049 A1 [0003]
• WO 2012/058466 A1 [0005]
• JP 2011217452 A [0005]
• CN 201966671 U [0005]
• US 2012/0098483 A1 [0005]
• DE 102010053058 A1 [0005]
• JP 2012005308 [0005]
• DE 102009033239 A1 [0005]
• DE 102009033237 A1 [0005]

Claims (8)

Charging station ( 100 ) for inductive energy transmission to a motor vehicle ( 20 ), with: one in the bottom area of the charging station ( 100 ) arranged transmitting coil ( 10 ); and a pilot signal output device ( 11 ) which is adapted to output a first optical guide signal (F1) at a first solid angle and to output a second optical guide signal (F2) at a second solid angle different from the first solid angle. Charging station ( 100 ) according to claim 1, further comprising: a coil control device ( 14 ), which are connected to a power grid ( 15a ; 15b ) is connectable, and which is adapted to the transmitting coil ( 10 ) to supply with electric current. Charging station ( 100 ) according to one of claims 1 and 2, further comprising: a communication device ( 12 ), which with the coil control device ( 14 ) and which is adapted to wirelessly transmit a position and / or identification radio signal (RF). Charging station ( 100 ) according to one of claims 1 to 3, wherein the first optical guide signal (F1) has light of a wavelength different from the wavelength of the light of the second optical guide signal (F2). Charging station ( 100 ) according to one of claims 1 to 3, wherein the first and the second optical guide signal (F1, F2) each have a pulsed light signal whose pulse frequencies are different. Charging station ( 100 ) according to one of claims 1 to 5, wherein the first solid angle and the second solid angle have no overlap and adjacent to each other. Procedure ( 30 ) for positioning an inductive power transmission device, comprising the steps of: detecting ( 31 ) of a first optical guidance signal (F1), which is emitted by a control signal output device ( 11 ) of a charging station ( 100 ) with a transmitting coil ( 10 ) is output for inductive energy transmission in a first solid angle, with a first Leitsignalempfangseinrichtung ( 22b ), which are attached to a vehicle ( 20 ) with a receiving coil ( 21 ) is mounted for inductive energy transfer; To capture ( 32 ) of a second optical guidance signal (F2), which is transmitted by a control signal output device ( 11 ) of the charging station ( 100 ) is output in a second solid angle, with a second Leitsignalempfangseinrichtung ( 22c ), which on the vehicle ( 20 ) is attached; Drive ( 33 ) of an automatic parking assistance system of the vehicle ( 20 ) based on a difference of the detected first and second optical guidance signals (F1, F2); and automatic parking ( 34 ) of the vehicle using the automatic parking assistance system, so that the receiving coil ( 21 ) for inductive energy transmission relative to the transmitting coil ( 10 ) is positioned. Procedure ( 30 ) according to claim 7, further comprising the steps of: detecting ( 31a ) of the first optical pilot signal (F1) with a third pilot signal receiving device ( 22a ) adjacent to the first pilot signal receiving device ( 22b ) on the vehicle ( 20 ) is attached; To capture ( 32a ) of the second optical pilot signal (F1) with a third pilot signal receiving device ( 22d ) adjacent to the second pilot signal receiving device ( 22c ) on the vehicle ( 20 ) is attached; and driving ( 33a ) of the automatic parking assistance system of the vehicle ( 20 ) on the basis of a difference of the detection signals of the first and third guidance signal receiving devices ( 22a ; 22b ) and a difference of the detection signals of the second and fourth Leitsignalempfangseinrichtungen ( 22c ; 22d ).

Images