Method for operating a system comprising a car park and at least one motor vehicle

Abstract

The present invention relates to a method for operating a system (1) comprising a car park (10) and at least one motor vehicle (100), wherein the car park (10) has parking spaces (11) which each have a stationary induction charging device (12). The respective stationary induction charging device (12) generates, for orienting the respective motor vehicle (100), an orientation field (18) which is oriented parallel to a parking direction (P) of the associated parking space (11), wherein at least two adjacent stationary induction charging devices (12) generate orientation fields (18) with different frequencies. The invention also relates to such a system (1).

Description

[0001] Method for operating a system with a parking space and at least one motor vehicle

[0002] The present invention relates to a method for operating a system comprising a parking space comprising multiple parking areas and a motor vehicle, wherein stationary induction charging devices of the parking areas interact with mobile induction charging devices of the motor vehicles for wireless energy transmission. The invention further relates to such a system.

[0003] For wireless energy transmission in a motor vehicle, a stationary induction charging device is typically used, which interacts with a mobile induction charging device of the motor vehicle. For wireless energy transmission, an energy coil of one of the induction charging devices serves as a primary coil, and an energy coil of the other induction charging device serves as a secondary coil. For energy transmission, the primary coil generates an alternating magnetic field, which induces a voltage in the secondary coil. To enable wireless energy transmission and increase the efficiency of the energy transmission, the primary coil and the secondary coil, and thus the energy coils of the induction charging devices, must be positioned accordingly relative to one another.

[0004] A parking lot typically comprises several parking spaces. It is conceivable to provide each parking space with a stationary induction charging device so that the respective parking space can interact with the mobile induction charging device of a motor vehicle for energy transfer. The stationary induction charging device of the respective parking space must be positioned relative to the associated mobile induction charging device of a motor vehicle parked in the parking space to enable energy transfer and increase efficiency. Theoretically, positioning can be achieved by a motor vehicle being driven into the parking space by the driver or at least semi-autonomously. However, this has the disadvantage that there is no reliable and / or precise positioning of the induction charging devices relative to one another, so that energy transfer either does not occur or occurs with reduced efficiency.It is therefore desirable to precisely position the vehicle in the parking area, and thus the relative positioning of the induction charging devices. For this purpose, it is conceivable that the parking area and the vehicle could communicate with each other.

[0005] DE 102017 202 966 A1 describes a system with a parking space and at least one motor vehicle. The parking spaces are equipped with occupancy sensors. The motor vehicle is informed of the occupancy status of the respective parking space.

[0006] The present invention addresses the problem of providing improved or at least different embodiments for a method for operating a system with a parking space and at least one motor vehicle of the aforementioned type, as well as for such a system, which, in particular, eliminate disadvantages of the prior art. In particular, the present invention addresses the problem of providing improved or at least alternative embodiments for the method and the system, which are characterized by reliable and more precise positioning of motor vehicles in parking spaces and increased efficiency of wireless energy transmission.

[0007] This object is achieved according to the invention by the subject matter of the independent claims. The embodiments are the subject matter of the dependent claims.

[0008] The present invention is therefore based on the general idea of ​​providing parking areas of the parking area with stationary induction charging devices in a system comprising a parking area and at least one motor vehicle, which in operation generate a directed field for aligning a motor vehicle relative to the associated parking area and thus relative to the stationary induction charging device, wherein at least two of the adjacent mobile induction charging devices generate the field with different frequencies, and wherein the motor vehicle receives the fields and detects the local intensity and thus signal strength as well as the frequency.Thus, when approaching a parking space, the motor vehicle can clearly identify which parking space and thus which stationary induction charging device should be used for wireless, inductive energy transfer with a mobile induction charging device of the motor vehicle due to the closer proximity to the approached parking space due to the higher intensity and the frequency associated with the higher intensity. This allows for reliable navigation of the motor vehicle to the approached parking space and optimal alignment and positioning of the induction charging devices relative to one another. This results in reliable and precise positioning of motor vehicles in parking spaces of the parking lot, which simultaneously improves energy transfer between the induction charging devices and thus achieves increased efficiency.

[0009] In particular, the method according to the invention eliminates the need to predetermine which parking space, and thus which stationary induction charging device, the motor vehicle should position itself toward, and the driver does not have to select this manually. Rather, the method, in particular a corresponding computer program product, automatically detects the strongest received signal and thus the highest local intensity. Based on the different frequencies, it can distinguish this from neighboring parking spaces and position it correctly.

[0010] According to the inventive concept, the method for operating the system is used with the parking lot and at least one motor vehicle. The parking lot has at least four parking spaces, preferably several parking spaces. Each parking space is provided with a stationary induction charging device which interacts with a mobile induction charging device of a motor vehicle for inductive wireless energy transmission. Each parking space can be accessed in one direction, which is also referred to below as the parking direction. At least two of the parking spaces, preferably the respective parking space, are arranged in a row running parallel to the parking direction, wherein the row is also referred to below as the longitudinal row. At least two of the parking spaces, preferably the respective parking space, are arranged in a row running transversely to the parking direction, wherein the row is also referred to below as the transverse row.To align the mobile induction charging device with the stationary induction charging device, the respective stationary induction charging device generates a field directed in the parking direction, which is also referred to below as the alignment field. The property of the alignment field being directed in the parking direction means that the field lines of the alignment field run more strongly in the parking direction and less strongly transversely to the parking direction. Thus, the respective alignment field is stronger along the associated longitudinal row than along the associated transverse row. Furthermore, the induction charging devices of the parking areas of at least one of the transverse rows generate the alignment field alternately at a first frequency and a second frequency, which are also referred to below as the first alignment frequency and second alignment frequency. The respective motor vehicle receives the alignment fields in such a way that the motor vehicle detects the local signal strength and the frequency of the alignment fields.When approaching a parking space, the stronger alignment field and the alignment frequency of the stronger alignment field are used to determine that the mobile induction charging device should be aligned with the induction charging device associated with the parking space. Using the alignment field associated with the approached parking space, a navigation instruction is then issued for aligning the vehicle in the parking space.

[0011] Advantageously, at least two of the alignment fields, preferably the respective alignment field, are generated with the same signal strength and thus intensity.

[0012] In this case, alignment is understood to mean, in particular, driving the motor vehicle onto the parking area and thus, in particular, bringing the mobile induction charging device closer to the stationary induction charging device and positioning it at the correct angle.

[0013] The parking direction is preferably parallel or along the length of the associated parking area.

[0014] Approaching a parking space typically occurs when the vehicle moves toward the parking space. Navigation using the navigation instructions can begin, in particular, when the vehicle has reached an outer edge of the parking space and / or the stationary induction charging device.

[0015] Advantageously, the stationary induction charging devices are spaced apart from one another. In particular, the stationary induction charging devices of the respective transverse row and the respective longitudinal row are spaced apart from one another.

[0016] It is conceivable that at least two parking spaces in at least one of the transverse rows directly touch each other, in particular that they directly merge into one another.

[0017] It is conceivable that a roadway runs between at least two of the longitudinal rows. It is conceivable that at least two parking spaces in at least one of the transverse rows are directly spaced from each other, i.e., that no roadway runs between the parking spaces.

[0018] In advantageous embodiments, the stationary induction charging devices of the respective transverse rows generate the alignment field alternately at the first alignment frequency and the second alignment frequency. Thus, the stationary induction charging devices of the parking spaces of the longitudinal rows preferably generate the alignment field at the same alignment frequency. The parking space can have at least three such transverse rows and at least two such longitudinal rows.

[0019] It is preferred if the stationary induction charging devices of the parking areas generate the alignment field along the transverse rows and along the longitudinal rows, each with an alternating alignment frequency, so that in one of the transverse rows the stationary induction charging devices of the parking areas generate the alignment field alternately with a first alignment frequency and a second alignment frequency, and in the respectively adjacent transverse row the stationary induction charging devices of the parking areas generate the alignment field alternately with a third alignment frequency and a fourth alignment frequency.Thus, the stationary induction charging devices of one of the transverse rows generate the alignment fields with a first sequence alternating between the first alignment frequency and the second alignment frequency, and the stationary induction charging devices of the adjacent transverse row generate the alignment fields with a second sequence alternating between the third alignment frequency and the fourth alignment frequency, with the first sequence and the second sequence of consecutive transverse rows alternating. This is preferably done such that, in the respective longitudinal row, the stationary induction charging devices of the parking areas generate the alignment field either alternating between the first alignment frequency and the third alignment frequency or between the second alignment frequency and the fourth alignment frequency.Thus, each stationary induction charging device generates the corresponding alignment field with an alignment frequency that differs from the alignment frequencies of the immediately adjacent mobile stationary induction charging devices. As a result, the motor vehicle, particularly the respective mobile induction charging device, can more easily distinguish between the stationary induction charging devices, thus achieving more reliable and precise positioning of motor vehicles in parking spaces and thus further increasing efficiency.

[0020] The respective alignment field can, in principle, be of any type. In preferred embodiments, the respective alignment field is a magnetic field, in particular an alternating magnetic field. This means that the respective mobile induction charging device generates a magnetic alignment field. This results in a simple generation of the alignment field, while at the same time, the alignment field can be easily received by the motor vehicle and is stable.

[0021] To generate the magnetic alignment field, the respective induction charging device can have a corresponding coil, which is also referred to below as an alignment coil. The alignment coil is advantageously wound around a winding axis running parallel to the parking direction.

[0022] Preferred embodiments are those in which at least one of the alignment fields widens along the associated parking direction, starting from the associated stationary induction charging device, in particular starting from the associated alignment coil. In particular, this widening can be only slight, resulting from the alignment fields diverging with increasing distance from their source, namely the alignment coil. This means that a motor vehicle receives the alignment field even when approaching the associated parking space at an angle or incline to the parking direction, and not, or not only, the alignment field of the adjacent stationary induction charging device. Thus, alignment and the output of the navigation instruction can be carried out reliably even when approaching in this way.

[0023] Preferably, the respective alignment field widens starting from the associated stationary induction charging device, in particular starting from the associated alignment coil, along the associated parking direction.

[0024] In preferred embodiments, the respective alignment field is used for the remote positioning of a mobile induction charging device relative to the stationary induction charging device associated with the parking area being approached. Remote positioning preferably occurs at distances between the induction charging devices of more than 0.5 m, in particular more than 1.5 m. Remote field positioning thus results in a rough positioning of the induction charging devices relative to one another.

[0025] In preferred embodiments, the respective stationary induction charging device also generates a field that is directed parallel to the normal of the plane of the associated parking space, in particular out of the plane of the associated parking space, and is also referred to below as a positioning field. This means, in particular, that the positioning field is directed in the vertical direction. The respective motor vehicle can receive the positioning field. This means, in particular, that the respective motor vehicle detects the local intensity of the positioning field. In this case, a navigation instruction for positioning the mobile induction charging device of the motor vehicle relative to the stationary induction charging device of the approached parking space is output using the positioning field.

[0026] The positioning of the induction charging devices relative to each other advantageously serves the purpose of not only bringing the induction charging devices closer to each other, but also aligning them relative to each other in the plane of the parking area.

[0027] It is preferred if the positioning field is used to position the mobile induction charging device close to the induction charging device associated with the parking area being approached. Close positioning refers to a more precise positioning of the induction charging devices relative to one another, particularly compared to remote positioning.

[0028] Preferably, close positioning occurs after remote positioning. Close positioning therefore begins in particular at distances between the induction charging devices of less than 0.5 m, in particular less than 0.3 m. Preferably, the respective stationary induction charging device generates the positioning field with four or five coils spaced apart from one another, each generating a magnetic field. This means that the positioning field is composed of four or five magnetic fields offset from one another. Thus, based on the different magnetic fields of the positioning field, the induction charging devices can be positioned in at least two directions running transversely to one another, in particular in the parking direction and transversely to the parking direction. This leads to more precise and simpler positioning of the induction charging devices relative to one another and consequently also to increased efficiency.

[0029] In preferred embodiments, the magnetic fields of the positioning field are each generated with an associated frequency, which is also referred to below as the positioning frequency. Thus, if a positioning field comprises four magnetic fields, one of the magnetic fields is generated with a first positioning frequency, one of the magnetic fields with a second positioning frequency, one of the magnetic fields with a third positioning frequency, and one of the magnetic fields with a fourth positioning frequency. If the positioning field comprises five magnetic fields, these are each generated with an associated positioning frequency, i.e., a magnetic field with a first positioning frequency, a magnetic field with a second positioning frequency, a magnetic field with a third positioning frequency, a magnetic field with a fourth positioning frequency, and a magnetic field with a fifth positioning frequency.The motor vehicle, especially the mobile induction charging device, can distinguish between the positioning frequencies. This allows for simple and reliable positioning of the induction charging devices relative to each other.

[0030] The induction charging device generating the magnetic fields of the positioning field preferably has an associated coil, preferably a flat coil, for generating the respective magnetic field. This coil is preferably wound in the plane or parallel to the plane of the associated parking space and / or around a winding axis running parallel to the normal of the parking space. This results in a directed upward radiation of the magnetic fields of the positioning field. This has the particular consequence that positioning by means of the positioning field is more precise and that there is little interaction and / or overlap between the positioning field and the alignment field. As a result, an improved, more reliable, and more robust positioning of the induction charging devices relative to one another or of the motor vehicle on the respective parking space is achieved.

[0031] Preferably, positioning is achieved using the magnetic fields of the positioning field by establishing a ratio between two of the magnetic fields and issuing the navigation instruction based on this ratio. This leads to a robust navigation implementation with increased reliability.

[0032] The respective navigation instruction can be provided to a driver, who can drive the motor vehicle according to the navigation instruction, in particular steer it, to achieve the desired orientation. Alternatively or additionally, the respective navigation instruction can be issued to a driver assistance system for at least partially autonomous driving of the motor vehicle, so that the driver assistance system drives the motor vehicle at least partially autonomously using the navigation instruction.

[0033] In preferred embodiments, the respective positioning frequency differs from the respective alignment frequency of the respective alignment field. This allows for an improved transition between remote and near positioning and / or eliminates any negative influence between remote and near positioning.

[0034] It is further preferred if the magnetic fields of the positioning field of the respective stationary induction charging device are generated at the same positioning frequencies. Thus, the system requires a reduced number of frequencies or a smaller frequency band overall.

[0035] The respective frequency is preferably in the kilohertz range. As mentioned above, it is preferred if the frequencies differ from each other. In particular, it is conceivable that neighboring frequencies in the frequency band differ from each other by 0.4 kHz to 1 kHz.

[0036] Advantageously, the first alignment frequency is 134.0 kHz or 135.0 kHz or 145.560 kHz.

[0037] Advantageously, the second alignment frequency is 135.5 kHz or 136.5 kHz or 137.0 kHz or 145.985 kHz.

[0038] The third alignment frequency is advantageously 133.5 kHz or 146.843 kHz.

[0039] Advantageously, the fourth alignment frequency is 137.0 kHz or 137.5 kHz or 147.275 kHz.

[0040] Advantageously, the first positioning frequency is 111.483 kHz or 134.5 kHz.

[0041] Advantageously, the second positioning frequency is 111.982 kHz or 136.0 kHz or 136.5 kHz.

[0042] The third positioning frequency is advantageously 112.994 kHz or 135.0 kHz.

[0043] Advantageously, the fourth positioning frequency is 113.507 kHz or 135.5 kHz or 136.0 kHz.

[0044] Advantageously, the fifth positioning frequency is 116.009 kHz or 135.5 kHz or 137.0 kHz or 137.5 kHz.

[0045] The respective motor vehicle, in particular the respective mobile

[0046] The induction charging device advantageously has a correspondingly equipped receiver for receiving the alignment fields and / or the positioning fields. The receiver can have at least one receiving coil. Preferably, the at least one receiving coil is different from the energy coil of the associated mobile induction charging device.

[0047] The method is advantageously implemented by means of a computer program product.

[0048] The computer program product conveniently contains instructions which, when executed on a computer system, result in the method being carried out as described.

[0049] The computer program product is preferably stored at least partially in the respective motor vehicle, in particular in the respective mobile induction charging device.

[0050] The computer program product is preferably executed at least partially in the respective motor vehicle, in particular in the respective mobile induction charging device. For this purpose, the motor vehicle, in particular the mobile induction charging device, can at least partially comprise the computer system. The computer system can at least partially be part of a control device of the motor vehicle, in particular the mobile induction charging device.

[0051] It is understood that in addition to the method for operating the system, such a system also belongs to the scope of this invention.

[0052] Further important features and advantages of the invention emerge from the subclaims, from the drawings and from the associated description of the figures based on the drawings.

[0053] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

[0054] Preferred embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, wherein the same reference numerals refer to the same or similar or functionally identical components.

[0055] They show, schematically

[0056] Fig. 1 is a simplified plan view of a system with a parking lot and motor vehicles,

[0057] Fig. 2 a section through a stationary induction charging device of the parking lot,

[0058] Fig. 3 shows a section through the stationary induction charging device in another embodiment,

[0059] Fig. 4 is a simplified plan view of the system in another embodiment,

[0060] Fig. 5 is a simplified plan view of the system in another embodiment.

[0061] A system 1, as shown by way of example in Figures 1, 4 and 5, comprises a parking space 10 and at least one motor vehicle 100. The parking space 10 comprises at least four parking areas 11, in the exemplary embodiments shown, several parking areas 11. The respective parking area 11 can be accessed in a direction P, which is also referred to below as the parking direction P.

[0062] The respective parking area 11 is provided with a stationary induction charging device 12 shown in Figures 2 and 3. The stationary induction charging device 12 can be arranged on the parking area 11 or at least partially embedded in the parking area 11. The respective stationary induction charging device 12 serves for the wireless, inductive energy transmission with a motor vehicle 100. For this purpose, the respective motor vehicle 100 has a mobile induction charging device (not shown), with which the stationary induction charging device

[0063] 12 interact inductively.

[0064] Such a stationary induction charging device 12 is shown in Figures 2 and 3. The respective stationary induction charging device 12 has an energy coil for energy transmission with a mobile induction charging device

[0065] 13. In the illustrated embodiments, the energy coil 13 is designed as a flat coil 14. The respective energy coil 13 is wound around a winding axis A1 running parallel to the normal axis of the associated parking area 11.

[0066] As can be seen from Figures 1, 4, and 5, at least two of the parking spaces 11 are arranged in a longitudinal row 15 running parallel to the parking direction P and spaced apart from one another. Furthermore, at least two of the parking spaces 11 are arranged in a transverse row 16 running perpendicular to the parking direction P. In the exemplary embodiments shown, the respective parking space 11 is arranged in such a longitudinal row 15 and transverse row 16. As can also be seen from the figures, a roadway 17 of the parking space 10 can run between two consecutive transverse rows 16.

[0067] As indicated in Figures 1, 4 and 5, the respective stationary induction charging device 12 (not shown in these figures) generates a field directed in the parking direction P for aligning a mobile induction charging device with the stationary induction charging device 12, which field is also referred to below as an alignment field 18. The alignment field 18 directed in the parking direction P is indicated in Figures 1, 4 and 5 by a correspondingly asymmetrical representation of the respective alignment field 18 in the parking direction P. In the exemplary embodiment shown, the respective stationary induction charging device 12 generates a magnetic alignment field 18. For this purpose, the respective stationary induction charging device 12 in the exemplary embodiments shown, as shown only in Figure 3, has a coil 19, which is also referred to below as an alignment coil 19.In the embodiments shown, the alignment coil 19 is wound around a winding axis A2 running parallel to the parking direction P.

[0068] As can also be seen from Figures 1, 4, and 5, the induction charging devices 12 of the parking spaces 11 of at least one of the transverse rows 16 generate the alignment field 18 alternately at a first frequency and a second frequency, which are also referred to below as the first alignment frequency and the second alignment frequency. In Figures 1, 4, and 5, those parking spaces 11 whose stationary induction charging devices 12 generate the alignment field 18 at the first alignment frequency are labeled "f1," and those parking spaces 11 whose stationary induction charging devices 12 generate the alignment field 18 at the second alignment frequency are labeled "f2." Furthermore, the different alignment frequencies are indicated by a different representation of the alignment fields 18.

[0069] The respective motor vehicle 10 can receive the alignment fields 18 in such a way that the motor vehicle 10 detects the local signal strength and the alignment frequency of the alignment fields 18. When approaching a parking space 11, as shown in Figures 1 and 4 and 5 for motor vehicles 100, the stronger alignment field 18 and the alignment frequency of the stronger alignment field 18 are used to detect that the mobile induction charging device is to be aligned with the stationary induction charging device 12 associated with the parking space 11. Furthermore, a navigation instruction for aligning the motor vehicle 100 in the parking space 11 is output using the alignment field 18 associated with the approached parking space 11. In the exemplary embodiments shown, the respective alignment field 18 is used for the remote positioning of a mobile induction charging device (not shown) in relation to the stationary induction charging device 12 associated with the approached parking area 11.This means in particular that by means of the respective alignment field 18, the mobile induction charging device is positioned relative to the stationary induction charging device 12 belonging to the parking area 11 at distances greater than 0.5 m, in particular for distances between 1.5 and 0.5 m.

[0070] In the exemplary embodiments of Figures 1 and 4, the stationary induction charging devices 12 of the parking spaces 11 of the respective transverse row 16 generate the alignment field 18 alternately with the first alignment frequency and the second alignment frequency. Thus, the stationary induction charging devices 12 of the parking spaces 11 of the longitudinal rows 15 each generate the alignment field 18 with the same alignment frequency. The exemplary embodiments of Figures 1 and 4 differ in that, in the exemplary embodiment of Figure 1, the parking space 10 has four transverse rows 16 and twelve longitudinal rows 15 of parking spaces 11, and in the exemplary embodiment of Figure 4, the parking space 10 has three transverse rows 16 and twelve longitudinal rows 15 of parking spaces 11. A roadway 17 runs centrally between the longitudinal rows 15.

[0071] As can be seen from Figure 5, the stationary induction charging devices 12 of the parking areas 11 can generate the alignment field 18 along the transverse rows 16 and along the longitudinal rows 17, each with alternating alignment frequencies, so that in one of the transverse rows 16, the stationary induction charging devices 12 of the parking areas 11 generate the alignment field alternately with the first alignment frequency and the second alignment frequency, and in the respectively adjacent transverse row 15, the stationary induction charging devices 12 of the parking areas 11 generate the alignment field 18 alternately with a third alignment frequency and a fourth alignment frequency.In Figure 5, those parking spaces 11 whose stationary induction charging devices 12 generate the alignment field 18 with the third alignment frequency are labeled "f3," and those parking spaces 11 whose stationary induction charging devices 12 generate the alignment field 18 with the fourth alignment frequency are labeled "74." As can also be seen from Figure 5, the first to fourth alignment frequencies result in the stationary induction charging devices 12 of the parking spaces 11 in the respective longitudinal row 15 generating the alignment field 18 either alternately with the first alignment frequency and the third alignment frequency or with the second alignment frequency and the fourth alignment frequency. The parking space 10 in Figure 5 has, purely by way of example, three transverse rows 16 and twelve longitudinal rows 15 of parking spaces 11, as in Figure 4.

[0072] For the sake of clarity, only the inwardly oriented halves of the alignment fields 18 are shown in Figure 1 and Figure 4 for the lowest transverse row 16 and for the outermost transverse row 16. For the sake of clarity, only half of the respective alignment field 18 with the first alignment frequency and the respective alignment field 18 with the second alignment frequency are shown in Figure 5.

[0073] As can be seen from Figures 1, 4 and 5, the respective alignment field 18 spreads out from the associated stationary induction charging device 12 along the associated parking direction P. Thus, the respective motor vehicle 100 can approach the respective parking area 11 even at an incline to the parking direction P and still receive the corresponding alignment field 18.

[0074] In the exemplary embodiments shown, the respective stationary induction charging device 12 also generates a field that radiates from the plane of the associated parking space 11 and is also referred to below as a positioning field. In the exemplary embodiments shown, the positioning field serves to position a mobile induction charging device of a motor vehicle 100 close to the stationary induction charging device 12 following remote positioning. The respective motor vehicle 100 receives the positioning field. Using the positioning field, a navigation instruction is output for positioning the mobile induction charging device of the motor vehicle 100 close to the stationary induction charging device 12 of the approached parking space 11.

[0075] As shown in Figures 2 and 3, the respective stationary induction charging device 12 has either four or five spaced-apart coils 20 for generating the associated positioning field, which are also referred to below as positioning coils 20. The respective positioning coil 20 generates a magnetic field, so that the respective positioning field is composed of four or five mutually offset magnetic fields. In the embodiment of Figure 2, the stationary induction charging device 12 has four positioning coils 20, so that the generated positioning field is composed of four magnetic fields. In the embodiment of Figure 3, the stationary induction charging device 12 has five positioning coils 20, so that the generated positioning field is composed of the five magnetic fields.In the illustrated embodiments, the respective positioning transmit coil 20 is a flat coil 14 wound around a winding axis A3 running parallel to the normal axis of the associated parking area 11. The respective magnetic field of the positioning field is generated with an associated frequency, which is also referred to below as the positioning frequency. In the embodiment of Figure 4, the positioning field is thus composed of a magnetic field with a first positioning frequency, a magnetic field with a second positioning frequency, a magnetic field with a third positioning frequency, and a magnetic field with a fourth positioning frequency.In the embodiment of Figure 3, the positioning field is composed of a magnetic field with a first positioning frequency, a magnetic field with a second positioning frequency, a magnetic field with a third positioning frequency, a magnetic field with a fourth positioning frequency and a magnetic field with a fifth positioning frequency.

[0076] In the illustrated embodiments, the respective frequency is in the kilohertz range. Furthermore, in the illustrated embodiments, the respective positioning frequency differs from the respective alignment frequency of the respective alignment field. Furthermore, the magnetic fields of the positioning field of the respective stationary induction charging device 12 are generated at the same positioning frequencies in the illustrated embodiments.

[0077] For example, the first alignment frequency is 134.0 kHz or 135.0 kHz or 145.560 kHz, the second alignment frequency is 135.5 kHz or 136.5 kHz or 137.0 kHz or 145.985 kHz, the third alignment frequency is 133.5 kHz or 146.843 kHz, the fourth alignment frequency is 137.0 kHz or 137.5 kHz or 147.275 kHz.

[0078] For example, the first positioning frequency is 111.483 kHz or 134.5 kHz, the second positioning frequency is 111.982 kHz or 136.0 kHz or 136.5 kHz, the third positioning frequency is 112.994 kHz or 135.0 kHz, the fourth positioning frequency is 113.507 kHz or 135.5 kHz or 136.0 kHz and the fifth positioning frequency is 116.009 kHz or 135.5 kHz or 137.0 kHz or 137.5 kHz.

Claims

Claims Method for operating a system (1) with a parking space (10) and at least one motor vehicle (100), wherein the parking space (10), • has at least four parking spaces (11 ), • the respective parking area (11) is provided with a stationary induction charging device (12) which cooperates with a mobile induction charging device of a motor vehicle (100) for wireless energy transmission, • the respective parking area (11) can be accessed in one parking direction (P), • at least two of the parking spaces (11) are arranged in a longitudinal row (15) running parallel to the parking direction (P), • at least two of the parking areas (11) are arranged in a transverse row (16) extending transversely to the parking direction (P), • the respective stationary induction charging device (12) generates an alignment field (18) directed in the parking direction (P) for aligning the mobile induction charging device (12) with the stationary induction charging device, • the induction charging devices (12) of the parking areas (11) of at least one of the transverse rows (16) generate the alignment field (18) alternately with a first alignment frequency and a second alignment frequency, wherein the respective motor vehicle (100) receives the alignment fields (18) in such a way that the motor vehicle (100) recognizes the signal strength and the alignment frequency of the alignment fields (18), wherein when approaching a parking area (11) it is recognized on the basis of the stronger alignment field (18) and the alignment frequency of the stronger alignment field (18) that the mobile induction charging device for the The stationary induction charging device (12) associated with the parking area (11) is to be aligned, wherein a navigation instruction for aligning the motor vehicle (100) on the parking area (11) is output by means of the alignment field (18) associated with the approached parking area (11). Method according to claim 1, characterized in that the stationary induction charging devices (12) of the parking areas (11) of the respective transverse rows (16) generate the alignment field (18) alternately with the first alignment frequency and the second alignment frequency. Method according to claim 1, characterized in that the parking space (10) has at least three such transverse rows (16) and at least two such longitudinal rows (15), that the stationary induction charging devices (12) of the parking areas (11) of the transverse rows (16) generate the alignment field along the transverse rows (16) and along the longitudinal rows (15) with alternating alignment frequencies, so that • in one of the transverse rows (16), the stationary induction charging devices (12) of the parking areas (11) generate the alignment field (18) alternately with a first alignment frequency and a second alignment frequency, and • in the adjacent transverse row (16), the stationary induction charging devices (12) of the parking areas (11) generate the alignment field (18) alternately with a third alignment frequency and a fourth alignment frequency, and • in the respective longitudinal row (16) the stationary induction charging devices (12) of the parking areas (11) the alignment field (18) either alternately with the first alignment frequency and the third alignment frequency or with the second alignment frequency and the fourth alignment frequency. Method according to one of claims 1 to 3, characterized in that the respective stationary induction charging device (12) generates a magnetic alignment field. Method according to one of claims 1 to 4, characterized in that at least one of the alignment fields (18) widens, starting from the associated stationary induction charging device (12), along the associated parking direction (P). Method according to one of claims 1 to 5, characterized in that the respective alignment field (18) is used for remote positioning of a mobile induction charging device relative to the stationary induction charging device (12) associated with the approached parking area (11).Method according to one of claims 1 to 6, characterized in that the respective stationary induction charging device (12) also generates a positioning field which is directed parallel to the normal of the associated parking area (11), that the respective motor vehicle (100) receives the positioning field, that by means of the positioning field a navigation instruction for positioning the mobile induction charging device of the motor vehicle (100) relative to the stationary induction charging device (12) of the approached parking area (11) is output. Method according to claims 6 and 7, characterized in that the positioning field is used to position the mobile induction charging device close to the induction charging device (12) associated with the approached parking area (11). Method according to one of claims 6 to 8, characterized in that the respective stationary induction charging device (12) generates the positioning field from four or five mutually offset magnetic fields.Method according to claim 9, characterized in that the four or five magnetic fields of the positioning field are each generated with an associated positioning frequency, so that the positioning field is composed of a magnetic field with a first positioning frequency, a magnetic field with a second positioning frequency, a magnetic field with a third positioning frequency and a magnetic field with a fourth positioning frequency, or is composed of a magnetic field with a first positioning frequency, a magnetic field with a second positioning frequency, a magnetic field with a third positioning frequency, a magnetic field with a fourth positioning frequency and a magnetic field with a fifth positioning frequency. Method according to claim 10, characterized in that the respective positioning frequency differs from the respective alignment frequency of the respective alignment field (18). Method according to claim 10 or 11, characterized in that the magnetic fields of the positioning field of the respective stationary induction charging device (12) are generated with the same positioning frequencies. Method according to one of claims 1 to 12, characterized in that the first alignment frequency is 134.0 kHz or 135.0 kHz or 145.560 kHz, and the second alignment frequency is 135.5 kHz or 136.5 kHz or 137.0 kHz or 145.985 kHz. Method according to one of claims 3 to 13, characterized in that the third alignment frequency is 133.5 kHz or 146.843 kHz, that the fourth alignment frequency is 137.0 kHz or 137.5 kHz or 147.275 kHz.Method according to one of claims 1 to 14, characterized in that the first positioning frequency is 111.483 kHz or 134.5 kHz, that the second positioning frequency is 111.982 kHz or 136.0 kHz or 136.5 kHz, that the third positioning frequency is 112.994 kHz or 135.0 kHz. that the fourth positioning frequency is 113.507 kHz or 135.5 kHz or 136.0 kHz, or that the first positioning frequency is 111.483 kHz or 134.5 kHz, that the second positioning frequency is 111.982 kHz or 136.0 kHz or 136.5 kHz, that the third positioning frequency is 112.994 kHz or 135.0 kHz, that the fourth positioning frequency is 113.507 kHz or 135.5 kHz or 136.0 kHz, and the fifth positioning frequency is 116.009 kHz or 135.5 kHz or 137.0 kHz or 137.5 kHz. System (1) with a parking space (10) and at least one motor vehicle (100) according to one of claims 1 to 15.

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