EP2890996A1 - Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur - Google Patents

Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur

Info

Publication number
EP2890996A1
EP2890996A1 EP13753654.6A EP13753654A EP2890996A1 EP 2890996 A1 EP2890996 A1 EP 2890996A1 EP 13753654 A EP13753654 A EP 13753654A EP 2890996 A1 EP2890996 A1 EP 2890996A1
Authority
EP
European Patent Office
Prior art keywords
receiver
electromagnetic field
determining
transmitter
field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13753654.6A
Other languages
German (de)
English (en)
Inventor
Bernd Ette
Bernhard Holldack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP2890996A1 publication Critical patent/EP2890996A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

Definitions

  • Various embodiments relate to a method for determining a position of a receiver and a corresponding location system.
  • various embodiments relate to techniques which allow the position of the receiver to be determined by means of rotating magnetic fields.
  • Techniques which include locating, i. a position determination, e.g. from identification providers.
  • An example of an identification transmitter would be, for example, a key for a motor vehicle: techniques are known which make it possible to determine the position of the key in the vicinity of the motor vehicle in order to achieve access control to the motor vehicle.
  • Conventional techniques are typically based on measuring a field strength of a signal transmitted by a central transmitter
  • supply lines to the plurality of transmitters may require space in the motor vehicle and may require time-consuming and expensive wiring with e.g. make two- or four-wire cables necessary.
  • supply lines to the plurality of transmitters typically three to five, may require space in the motor vehicle and may require time-consuming and expensive wiring with e.g. make two- or four-wire cables necessary.
  • such systems often have a low degree of modularity, since it is not readily possible to operate the system operatively with a smaller or larger number of transmitters - it is therefore not or only possible to a limited extent, different
  • the corresponding system may be relatively susceptible to interference, as a failure or malfunction of the central controller may often result in a complete failure of the system.
  • the invention relates to a method for determining a position of a receiver.
  • the method comprises emitting at least one electromagnetic field in each case by a transmitter, wherein an amplitude of the at least one
  • the method further relates to measuring the at least one electromagnetic field by the receiver and determining a difference phase for each of the at least one electromagnetic field at the position of the receiver based on the measured at least one electromagnetic field.
  • the method further comprises determining the position of the receiver based on the at least one determined difference phase.
  • the electromagnetic field can be a time-dependent electromagnetic alternating field with a specific frequency.
  • the frequency may be, for example, in a range of 100 kHz to 10 MHz, preferably up to 1 MHz, and particularly advantageously 125 kHz or 1 MHz.
  • the transmitter may comprise an electromagnetic resonant circuit having an inductance and a capacitor; The person skilled in the art, techniques are known which allow appropriate design of the transmitter for generating these frequencies.
  • the electromagnetic (em) field can be referred to, for example, as a rotating em field, since the amplitude can rotate in a rotation plane around the transmitter in a time-dependent manner, ie, can perform a rotational movement at an angular velocity.
  • points of the same phase position ie, for example, a maximum or minimum of the field strength of the em field
  • points of the same phase position ie, for example, a maximum or minimum of the field strength of the em field
  • a field strength maximum as the light beam of a lighthouse here the transmitter
  • a lighthouse here the transmitter
  • Rotational frequency of the rotational motion to be equal to the frequency of the em field itself. But it is also possible that the rotation frequency takes other values.
  • the rotational motion of the em field can be characterized (as is typical of cyclical processes) by a particular phase (phase) of the motion; a full rotation can be one
  • the rotating field can be e.g. move at a constant angular velocity.
  • certain predetermined dependencies of the angular velocity on the phase (the angle) are possible.
  • the plane of rotation may be parallel or substantially parallel, i. e.g. less than ⁇ 20 °, preferably less than ⁇ 10 °, more preferably less than ⁇ 2 °, is aligned with the horizontal, e.g. is essentially parallel with a ground.
  • the rotational movement of the em field emitted can result in a corresponding time dependence of the field strength or the phase position of the em field at the location of the receiver.
  • the receiver can be set up to measure the field strength of the em field in a time-dependent and / or frequency-resolved manner.
  • the magnetic field component of the em field may be arranged to measure an amplitude of the magnetic field component of the em field, which in turn may be proportional to a field strength of the em field. It may then be possible to determine the difference phase from the measurement of the field strength; e.g.
  • a reference phase which can be determined in particular from the phase of the em field at the transmitter during transmission.
  • the transmitter sends out the em field in such a way that it points to the east (defined as desired).
  • the receiver is located to the south of the transmitter and does not "see" the maximum (yet) until a phase of 90 ° at the transmitter reaches the maximum of the amplitude (when the rotating em field rotates clockwise) Difference phase can therefore be given as -90 ° in this example
  • a corresponding example can, of course, also be shown for values of the em field other than the maximum of the amplitude, for example, this can relate to a specific trigger level of the amplitude. or descending edge is defined.
  • the difference phase versus another reference phase such as against a system clock or an external trigger signal, such as the actuation of a door handle by a user or a detected object in an environment area or the like.
  • a minimum or a zero crossing instead of the maximum of the amplitude or field strength, or any phase position or significant points of the time characteristic of the characterizing observable.
  • an amplitude of the magnetic component of the electromagnetic field may be considered, or an amplitude of the electric
  • the transmitter and / or the receiver may include at least one coil configured to interact inductively with the magnetic component of the electromagnetic field.
  • the position of the receiver can be determined.
  • the term "position” can denote a wide variety of accuracy of positioning: In a particularly simple embodiment, the term “position” can only designate an angle of the receiver with respect to the transmitter (-90 ° in the above example).
  • position additionally or alternatively to the angle with respect to the transmitter also designates a distance with respect to the transmitter, for example within the plane of rotation of the em field It is also possible that the term “position” additionally or alternatively a distance, for example, with respect to this plane of rotation of the em field, ie perpendicular to the plane of rotation; in such a case, it may in particular be possible for the term "position” to denote an absolute position determination of the receiver within a reference coordinate system;
  • the reference coordinate system may be generally arbitrary, it may be desirable to define it with respect to the at least one transmitter (for example, it may be located at the origin of the reference coordinate system).
  • the term "determining a position" may include determining individual coordinates of the
  • Three-dimensional space such as distance and / or azimuth angle and / or polar angle of a spherical coordinate system, or all coordinates of the three-dimensional space denote.
  • a particularly accurate determination of the position of the receiver may include in particular the determination of several or all coordinates of the three-dimensional space.
  • Frequency multiplexing can have the effect of particularly fast determination of the position.
  • Determining the position of the receiver may be done based on triangulation for the at least two differential phases, and determining the position of the receiver may include determining a direction and distance at which the receiver is located in a plane of rotation of the time dependent electromagnetic field with respect to at least one of the transmitters , include.
  • determining the position of the receiver may include determining a direction and distance at which the receiver is located in a plane of rotation of the time dependent electromagnetic field with respect to at least one of the transmitters , include.
  • time-multiplexing since the several em fields are sent sequentially, that is successively or at different times.
  • the triangulation may generally mean determining the position based on the measured difference phases and a known arrangement of the plurality of transmitters to each other. Techniques for triangulation are known in principle to the person skilled in the art, so that no further details need to be explained here.
  • the transmitters may be stationary, e.g. are arranged with respect to the reference coordinate system, and the receiver is arranged to be movable.
  • the direction may be indicated as an azimuth angle in a reference coordinate system with spherical coordinates originating from one of the transmitters.
  • Other definitions are possible.
  • Such techniques involving the emission of two or more em fields may allow for a particularly accurate determination of the position of the receiver, or they may allow two or three coordinates of the position of the receiver to be determined.
  • the certain position can be displayed for example on a display for a user. This can also make it easy to find the recipient.
  • the techniques of triangulation the effect of accurate position determination can be achieved. It should be understood that the determination of a difference phase for the rotating em fields can be done comparatively accurately, ie can have a comparatively small error - in particular in comparison to conventional techniques which are based on a measurement of the field strength of the em field and in which
  • Position determination based on a damping rate of the amplitude of the em field.
  • the two or more em fields may be sent out so that they all rotate in a plane of rotation.
  • Electromagnetic field occurs, wherein determining the position of the receiver determining a direction under which the receiver in a plane of rotation of the
  • time-dependent electromagnetic field with respect to at least one of the transmitter is arranged comprises.
  • the method may further comprise receiving an estimate of the position of the receiver, wherein transmitting the at least one electromagnetic field is the one of
  • the estimate of the position is obtained from further sensor data.
  • the estimation of the position can be obtained from elements of the following group: actuation of a door handle of the
  • estimating the position of the receiver may specify a range of possible positions of the receiver; the area can e.g. be defined in a reference coordinate system.
  • the position of the receiver specifies that the receiver is in a position between the north direction and the east direction opposite the transmitter.
  • the measurement duration of the em field can thereby be reduced - which on the one hand can reduce the time required to determine the position and on the other hand can reduce energy consumption for transmission.
  • the latter can be particularly advantageous in applications in which only a limited reservoir of energy for emitting the at least one em field is available.
  • a corresponding application example would be, for example, determining the position of the key for a battery-powered electric motor vehicle.
  • the transmission can be done either sequentially or for the single electromagnetic field for the two or more electromagnetic fields. For example, it may be possible to transmit only one em field if the estimate of the position is within a certain predetermined range - for example in the application for key location in the motor vehicle behind the
  • the method may further comprise determining a field strength for the at least one electromagnetic field in the position of the receiver based on the measured at least one electromagnetic field, wherein determining the position of the receiver is determining a distance of the receiver to a plane of rotation of the electromagnetic field based on includes the determined field strength.
  • a coil may be provided as a transmitter which encloses a certain angle with the plane spanned by the other coils plane. Namely, if the receiver is spaced from the plane of rotation, so at the same position within the plane of rotation (distance to the transmitter, angle to the transmitter) larger or smaller distances to
  • Rotation level cause smaller or larger field strengths.
  • the field strength e.g. the amplitude of the magnetic field component can be used. It may alternatively or additionally also be desirable, based on the field strength a distance of
  • the method may further comprise modulating the at least one electromagnetic field to transmit information to the receiver, the information comprising elements selected from the group consisting of a reference phase clock information, identification information of the at least one transmitter.
  • modulation techniques selected from the following group: Frequency Modulation (FM), Phase Modulation (PM), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), Pulse Amplitude Modulation (PAM), Pulse Code Modulation (PCM).
  • FM Frequency Modulation
  • PM Phase Modulation
  • FSK Frequency Shift Keying
  • PSK Phase Shift Keying
  • PAM Pulse Amplitude Modulation
  • PCM Pulse Code Modulation
  • other modulation techniques as are generally known to those skilled in the art, are possible.
  • the identification information may include, for example, information about a position of the respective transmitter.
  • This position information can indicate, for example, where in relation to the motor vehicle, the respective transmitter is, such as "right front” or “left” or “rear right", etc. It is possible, for example, to transmit this position information explicitly or as Code parameterized, eg via a table stored in the receiver, for example
  • Modulation frequency equal for all em fields to choose.
  • the transmitted information can differ in each case.
  • each rotating em field may be represented by a plurality, e.g. three or four em fields sent out by individual coils under a given phase relationship is generated.
  • These em fields generating the rotating em field may in turn be differently modulated, e.g. to transmit different information.
  • a particular modulation technique and / or modulation frequency may be preferred - for example, the modulation technique in an application for determining the position of a motor vehicle key may be different than an application for locating persons in a building space.
  • the determination of the difference phase is still based on the timing information of the reference phase.
  • the difference phase compared to the reference phase can be determined.
  • the clock information may have different information content: In a particularly simple embodiment, it is possible that the clock information only indicates a zero crossing (or integer multiple of 360 °) of the reference phase. In various other embodiments, however, it may be possible for the reference phase to be transmitted time-resolved via the clock information. It may thus be possible to determine the current phase position or reference phase in a fraction of a rotation of the em field. Of course, it is also possible to transmit the reference phase in certain steps, for example at intervals of ⁇ / 2 or ⁇ / 4 or ⁇ / 8 etc.
  • the identification information may be used, for example, in applications that include authentication of the recipient. For example, in the position determination of a motor vehicle key, the identification information of at least the motor vehicle with identification information of the recipient to prevent unauthorized access.
  • Frequency ranges such as the above-mentioned frequency ranges
  • a higher (lower) frequency can cause a lower (greater) rate of decay of the field strength and therefore allow a larger (smaller) sensitive area. It will be explained below how, in various embodiments, the position determination method according to the present aspect can make use of this finding.
  • the method may comprise transmitting at least one further electromagnetic field in each case by a transmitter, wherein the at least one further electromagnetic field may have a frequency that is greater than a frequency of the at least one electromagnetic field.
  • the method may further comprise measuring the at least one further electromagnetic field by the receiver and determining a field strength for each of the at least one further electromagnetic field at the position of the receiver based on the measured at least one further electromagnetic field and determining a distance of the receiver the at least one transmitter based on the at least one detected field strength include.
  • the amplitude e.g. the magnetic component
  • the frequency of the further em field it may be possible for the frequency of the further em field to be about 1 MHz and the frequency of the em field to be 125 kHz. In such a case, the fading rate of the field strength of the further em field may be less than the fading rate of the em field.
  • the further electromagnetic field rotates in each case as a function of time with respect to the respective transmitter - in other words, it may be possible for the further em field to also be a rotation field or a rotating field.
  • the other em field is a rotation field.
  • the further em field may have no or only a slight temporal dependence of the field strength on the angle with respect to the transmitter or the angular velocity is 0. In the latter case, it may be possible to determine the field strength, the distance, ie a component of the position in the
  • the electromagnetic field determines the electromagnetic field. This may be the case, since the sensitive area for the at least one further electromagnetic field may be greater than the sensitive area for the at least one electromagnetic field.
  • the emission of the at least one further electromagnetic field which is not a rotation field, can have a comparatively low energy consumption.
  • Electromagnetic field and determining the position of the receiver based on the at least one determined difference phase can be done selectively taking into account determining the distance of the receiver with the at least one further em field.
  • the far-end range may extend to greater distances to the transmitter than the near-end range.
  • the far-end area can surround the near area and adjoin it.
  • the at least one em field can be selectively emitted and the following steps performed accordingly ( Measuring, determining difference phase, determining position).
  • the emission of the at least one time-dependent electromagnetic field can in each case the phase-shifted energizing of at least three in a plane of rotation of the
  • Coordinate arranged coils of the at least one transmitter wherein the phase-offset Bestromen a structurally predetermined angular arrangement of the at least three coils in the plane of rotation considered, so that a rotation frequency of the electromagnetic field is equal to a frequency of the electromagnetic field.
  • the coil plane or rotation plane it may be possible to have three (four) coils at angles of 120 ° (90 °) in a plane, i. the coil plane or rotation plane are arranged.
  • the coils it is e.g. it is possible for the coils to be energized so that the rotating em field is transmitted so that it performs one or two or more rotations, i. Phases of 2 TT, 4 TT, etc. accumulated. It is also possible that the coils are energized so that the rotating em field is transmitted so that it performs only a fraction of a complete rotation, about 1/4 turn or 1/2 turn, i. Phases of ⁇ / 2 or ⁇ are accumulated.
  • electromagnetic field is triggered by a control signal sent by a trigger signal. It may thus be possible that e.g. the phases of several
  • the emitted time-dependent em fields are synchronized. This can have the effect of a particularly simple determination of the difference phase.
  • the at least one em field can be transmitted with a specific time offset with respect to the trigger signal; it is also possible that different em fields have different temporal offset from the trigger signal.
  • the trigger signal may further transmit information about this skew. It is possible that the receiver is movable relative to the at least one transmitter, and that the at least one transmitter is connected to a control unit.
  • the method may further include wirelessly transmitting the determined differential phase and / or the determined position from the mobile receiver to the controller. It may be possible to carry out the steps of determining a difference phase and determining the position in a computer unit of the receiver.
  • Triangulation in such a stationary computer unit.
  • Stationary can hereby e.g. mean: fixedly mounted in a motor vehicle.
  • the invention relates to a method for determining a position of an access control access sensor to a motor vehicle, which is configured according to the method for determining a position of a receiver according to another aspect of the invention.
  • the identification transmitter may be a key of the motor vehicle.
  • identification information which is transmitted to the identification transmitter, for example by modulating the electromagnetic field, is compared with identification information of the identification transmitter. This can serve the authentication or access control.
  • effects can be achieved which are comparable to the effects that can be achieved for a method for determining the position of the receiver according to a further aspect of the invention.
  • the invention relates to a location system for a receiver, wherein the location system comprises at least one transmitter, which is in each case arranged to emit a time-dependent electromagnetic field, wherein an amplitude of the
  • Locating system further comprises the receiver, which is adapted to measure the at least one time-dependent electromagnetic field.
  • the location system further comprises a computing unit configured to perform the steps of: determining a difference phase for each of the at least one electromagnetic field at the position of the receiver based on the measured at least one time-dependent one electromagnetic field; and determining the position of the receiver based on the at least one determined difference phase.
  • the computing unit is located within the receiver. But it is also possible that the computer unit is arranged outside the receiver. It is also possible that parts of the steps of the computing unit are performed within the receiver, for example, determining the difference phase while other parts are being performed outside the receiver, for example determining the position of the receiver. It is possible that the computer unit or functions of the computer unit are implemented as hardware or software or a combination thereof and / or are executed on different hardware units.
  • the location system of the presently discussed aspect may be further configured to perform a method of determining a position of a receiver according to another aspect of the present invention.
  • effects can be achieved which are comparable to the effects that can be achieved for the method for determining the position of the receiver according to the further aspect of the invention.
  • the invention relates to a motor vehicle, which a
  • Locating system for a receiver wherein the location system comprises at least one transmitter, which is arranged in each case to emit a time-dependent electromagnetic field, wherein an amplitude of the electromagnetic field as a function of time rotates relative to the transmitter.
  • the positioning system of the motor vehicle further comprises the receiver, which is configured to measure the at least one time-dependent electromagnetic field.
  • the location system of the motor vehicle further comprises a
  • a computer unit configured to perform the steps of: determining a difference phase for each of the at least one electromagnetic field at the location of the receiver based on the measured at least one time dependent one
  • the invention relates to a coil arrangement for generating a rotating electromagnetic field, wherein the coil arrangement comprises at least three coils, each with at least one associated coil winding.
  • the coil arrangement further comprises a ferromagnetic coil yoke, which produces a magnetic coupling of the at least three coils.
  • the at least one coil winding may itself comprise a plurality of turns of an electrically conductive wire or a conductor tracks.
  • the coils may comprise one or more coil windings - in other words, in the case of a plurality of coil windings of a coil, these coils may be separately electrically contactable or tapped off.
  • the magnetic coupling may be characterized by a certain magnetic flux, e.g. has a certain size.
  • a magnetic flux may e.g. be generated by the continuous connections of Spulenjoche.
  • Coil arrangement has a certain value, e.g. about or exactly 0.
  • the coil yoke can be continuous, ie without or only with a few and / or with very small or short interruptions or air gaps. It may be made of a ferromagnetic material, such as iron, chromium, nickel, oxides of these materials, such as ferrite, alloys of iron, chromium, nickel, etc.
  • the magnetic coupling may refer to a ferromagnetic exchange interaction extending over the entire region of the coil yoke formed.
  • the at least three coils are arranged in a coil plane and that adjacent coils are arranged within the coil plane at angles of approximately 120 °.
  • adjacent coils may be arranged at angles of 120 ° ⁇ 10 °, preferably ⁇ 5 °, more preferably ⁇ 0.5 °. It may then be possible to generate the rotating electromagnetic field with a comparatively simple driving of the coils (for example, with AC voltages phase-shifted by 120 °). in the
  • angles that include adjacent coils within the coil plane with each other, possible. If the coils are arranged inside the coil plane, this may mean that the coils (or their central axes) have no or only a small angle, e.g. ⁇ 10 °, preferably ⁇ 5 °, more preferably ⁇ 1 °, with vectors spanning the coil plane.
  • embodiments have been described in which all the coils lie within a coil plane.
  • a coil plane can determine a plane of rotation of the rotating em field.
  • embodiments are also possible in which individual or several coils are located outside the coil plane, which is defined by at least two coils. In other words, one or more coils can be tilted relative to the coil plane. Even in such a case, it may be possible for the coil plane to define the plane of rotation.
  • the ferromagnetic coil yoke is arranged continuously within the at least three coils, and that the coil arrangement further comprises at least three
  • Capacitors each connected in series with one of the at least three coils, and a housing with external electrical contacts and mechanical holders.
  • each coil may be connected in series (series connection) with a capacitor.
  • the values of the inductance of the coil and the capacitance of the capacitor can then determine, in a manner known to those skilled in the art, a frequency of the respective em field produced.
  • the frequency may e.g. in a range from 100 kHz to 10 MHz, preferably up to 1 MHz, particularly advantageously 125 kHz or 1 MHz.
  • Coil windings and therefore different inductances vorzuhalten can therefore be several resonant circuits with different resonance frequencies available.
  • the coil arrangement can therefore emit em fields with different frequencies.
  • the at least one coil windings of the at least three coils each have the same geometries and / or turns.
  • the at least three coils may be of the same type and type. It Therefore, it may be possible to generate by means of a particularly simple energizing the rotating em field, which advantageously has a constant angular velocity of the rotation.
  • the invention relates to a location system for determining a position of an identification transmitter for a motor vehicle, wherein the positioning system comprises at least two coil arrangement according to a further aspect of the invention, wherein the at least two coil arrangement are fixedly mounted and arranged at different locations of the motor vehicle, each to be operated as a transmitter for a rotating electromagnetic field.
  • the location system further comprises the identification transmitter with a receiving coil, wherein the identification transmitter is set up to be operated as a receiver for the at least two rotating electromagnetic fields.
  • the location system may be configured to adjust the location of the
  • the location system may be arranged to determine the position in an interior of the motor vehicle.
  • a frequency of the receiver coil can be tuned to the frequencies of the at least two coil arrangements. It may preferably be e.g. three or four
  • Coil arrangements may be provided.
  • the coil assemblies may be mounted spaced apart.
  • such a location system may be configured to perform the method for determining the position of the receiver.
  • a particularly accurate determination of the position of the identification transmitter can take place. For example, it may be possible to determine a reference phase relative to the at least two rotating ones
  • the location system may further comprise a control unit, which is set up, the at least two coil arrangements for emitting the respective rotating
  • the controller may e.g. be a central computer unit of the motor vehicle.
  • the control unit may be implemented as hardware or software or a combination thereof on the central computer unit of the motor vehicle.
  • control unit via a bus system with the at least two
  • Coil assemblies is coupled and that each of the at least two coil assemblies is coupled to a supply line and that each of the at least two coil assemblies is arranged to receive a control signal of the controller via the bus system and to generate in response to the control signal, the rotating electromagnetic field, wherein the energy for emitting the rotating electromagnetic field over the
  • the coil arrangements may comprise a computer unit as an interface for communication with the control unit via the bus system.
  • the computer unit can be set up to receive and process the control signal.
  • the supply line may e.g. be an electrical system of a motor vehicle.
  • Supply line may e.g. have other current-voltage ratios than is necessary for driving the coils of the coil assemblies for generating the rotating em field.
  • the supply line can provide a 12 V DC voltage. Therefore, the coil assemblies may include a circuit for current-voltage conversion, that is, an AC voltage source.
  • the coil assemblies may include a circuit for current-voltage conversion, that is, an AC voltage source.
  • Decentralized supply of coil arrangements with energy to generate the rotating field em As effect, a simplified system architecture can be achieved - in particular, it may be unnecessary to provide dedicated supply lines from the controller to the individual coil assemblies.
  • the coil assemblies can selectively remove energy from the vehicle electrical system in response to an instruction from the controller via the bus system to generate the rotating em field. Typically they are
  • the invention relates to a motor vehicle with a location system for determining a position of an identification transmitter for a motor vehicle, wherein the location system of the motor vehicle at least two coil arrangement according to another Aspect of the invention comprises, wherein the at least two coil assembly are fixedly mounted at different locations of the motor vehicle and are arranged to be operated in each case as a transmitter for a rotating electromagnetic field.
  • Positioning system of the motor vehicle further comprises the identification transmitter with a receiving coil, wherein the identification transmitter is configured to be operated as a receiver for the at least two rotating electromagnetic fields.
  • FIG. FIG. 1 is a plan view of a coil assembly for a locating system
  • Coil arrangement comprises three coils each having two coil windings
  • FIG. 2A is a plan view of a coil arrangement as shown in FIG. 1, in which a coil is tilted with respect to a coil plane;
  • FIG. FIG. 2B is a side view of the coil assembly of FIG. 2A is;
  • FIG. FIG. 3 shows the current through the coils of the coil assembly of FIG. 1 as a function of time, the current being generated by an AC voltage;
  • FIG. 4 is an isocontopic plot of the amplitude of the magnetic field component of the coil assembly of FIG. 1 generated electromagnetic field at a certain time;
  • FIG. FIG. 5 shows the rotation of the electromagnetic field of the coil arrangement of FIG. 1 illustrates the amplitude of the magnetic field component by means of the temporal evolution of isocontopic plots;
  • FIG. FIG. 6 shows a measured amplitude of the magnetic component of the rotating electromagnetic field of FIG. 5 represents a point within the plane of rotation spaced from the transmitter as a function of time;
  • FIG. 7A illustrates a phase relationship for a particular position of the receiver versus a rotating electromagnetic field generated by two coil arrays
  • FIG. Fig. 7A is a plan view of a plane of rotation in which the electromagnetic field is rotating
  • FIG. 7B is a side view of FIG. 7A is and a distance of the receiver to the
  • FIG. 8A illustrates an electrical circuit of a coil comprising two coil windings and two capacitors
  • FIG. 8B shows a rate of decay of the field strength of the electromagnetic field for different modes of operation of the electrical circuit of FIG. 8A or illustrated for different frequencies;
  • FIG. 8C schematically illustrates an AC source connected to a vehicle electrical system and the coils of the coil assembly
  • FIG. 9A is a perspective view of the coil assembly of FIG. 1 is in a housing
  • FIG. 9B is a top plan view of the coil assembly with housing of FIG. 9A is;
  • FIG. 9C is a bottom plan view of the coil assembly with housing of FIG. 9A is;
  • FIG. 9D is a perspective view of the coil assembly of FIG. 9A is where the
  • Coil assembly is mounted on a guide plate
  • FIG. 9E is another perspective view of the coil assembly of FIG. 9A, wherein the coil assembly is mounted on a baffle;
  • FIG. 9F is a side view of the coil assembly of FIG. 9D and 9E;
  • FIG. 10A is a perspective view of the coil assembly of FIG. Figure 1 is in an alternative embodiment of the housing;
  • FIG. 10B is a top plan view of the coil assembly with the alternative
  • Embodiment of the housing of FIG. 10A is;
  • FIG. 10C is a bottom plan view of the coil assembly with the alternative
  • Embodiment of the housing of FIG. 10A is;
  • FIG. 10D is a perspective view of the coil assembly of FIG. 1 with the alternative embodiment of the housing, the coil assembly being mounted on a baffle;
  • FIG. 10E is a side view of the coil assembly of FIG. 1 with the alternative
  • Embodiment of the housing wherein the coil assembly is mounted on a guide plate;
  • FIG. 1 1 is a plan view of an integrated on a printed circuit board embodiment of the
  • Coil arrangement is, in which the coils are formed by conductor tracks
  • FIG. 12 is a schematic sketch of a prior art locating system for a
  • Identification transmitter of a motor vehicle is
  • FIG. 13 is a schematic sketch of a locating system according to the invention for a
  • Identification transmitter of a motor vehicle is
  • FIG. 14 shows a structural arrangement of the locating system of FIG. 13 represents in the motor vehicle.
  • FIG. Fig. 15 is a flowchart of a method for determining a position of a receiver.
  • FIG. 1 is a plan view of a coil assembly comprising three coils 210a, 210b, 210c.
  • the coil 210a has two coil windings 212a, 212b.
  • the coil 210b has two coil windings 212c, 212d.
  • the coil 210c has two coil windings 212e, 212f.
  • the coil windings 212a-212f are each wound around one of three arms 21 1 a, 21 1 b, 21 1 c of a ferromagnetic Spulenjochs 21 1 and can be electrically contacted separately.
  • the coil yoke may e.g. consist of iron, nickel, chromium, oxides or alloys of these materials.
  • the arms 21 1 a, 21 1 b, 21 1 c have a circular cross section and are therefore cylindrical. They may have a diameter of 3 mm-30 mm, preferably 6 mm.
  • the shape of the arms is variable. They extend radially from a center of the coil assembly 200.
  • the coil yoke is continuous and therefore in particular has no large gaps or gaps - therefore, a magnetic coupling (in the form of a ferromagnetic
  • the magnetic flux may be at various points of the coil assembly 200
  • the magnetic flux may be zero or near zero, i. a very low value.
  • the coils 210a, 210b, 210c are all in one plane.
  • FIGS. 2A and 2B an alternative embodiment is shown in which the coil 210c is tilted with respect to this plane (coil plane) by an angle ß.
  • the angle ⁇ can be e.g. in a range of 20 ° -30 °.
  • the coil 210a includes an angle 213a with the coil 210b.
  • the coil 210b includes an angle 213b with the coil 210c.
  • the coil 210c includes an angle 213c with the coil 210a.
  • These angles 213a, 213b, 213c each extend within the coil plane. In the embodiment of FIG. 1, these angles 213a, 213b, 213c take equal values, namely 120 °. In other words, the
  • Coil assembly 200 of FIG. 1 is a star configuration. While in FIG. However, as shown in Figure 1, a highly symmetrical embodiment, it is generally possible for the various angles 213a, 213b, 213c to assume different values - this may be be particularly desirable if a design of the coil assembly 200 is subject to certain limitations due to structural limitations.
  • the angles 213a, 213b, 213c are not particularly limited and can take various values.
  • the angles 213a-213b-213c could each have the following values: 180 ° -90 ° -90 °; 200 ° - 80 ° - 80 °, 160 ° - 100 ° - 100 °.
  • individual coils 210c may be tilted out of the coil plane. This allows the lateral dimensions of the coil assembly 200, i. the dimensions are reduced within the spool plane spanned by the spools 210a, 210b. However, since a component of the time-dependent electromagnetic field generated by the coil 210c is still within the coil plane, can with the
  • Coil assembly 200 of FIGS. 2A and 2B an electromagnetic field generated by the electromagnetic field of the coil assembly 200 of FIG. 1 is comparable.
  • the coil assemblies 200 comprise three coils 210a, 210b, 210c
  • the coil arrangement 200 comprises four (six) coils which each enclose an angle of 90 ° (60 °) to one another within the coil plane.
  • the rotating field is generated by superimposing the em fields emitted by the individual coils 210a, 210b, 210c.
  • the rotating em field can designate such a field in which points of the same phase of the em field rotate as a function of time about the coil arrangement 200 (for example its center 201, see FIG.
  • the coils 210a-210c together with a
  • Capacitor (not shown in FIGS. 1 - 3) driven as a resonant circuit.
  • FIGS. 3 an embodiment is discussed in which the entire coils 210a, 210b, 210c of the coil assembly 200 of FIG. 1, i. each of the windings 212a, 212b and 212c, 212d and 212e, 212f combined, are energized.
  • the current flow 85 through the coils 210a, 210b, 210c is plotted as a function of time. Such a current flow can be achieved by a corresponding AC voltage.
  • the alternating voltages / the current flow 85 have a phase difference of 120 ° - ie
  • the AC voltage 85 can, for example by a Current-voltage converter, the coil assembly 200 with a 12 V
  • the DC voltage network of a motor vehicle connects, generated.
  • the AC voltage 85 may then be applied to the innermost and outermost contacts of an arm associated with the respective coil 210a-210c.
  • Such energization of the coils 210a, 210b, 210c causes an electromagnetic field 80, as shown by the in FIG. 4 plotted amplitude 81 of the magnetic field component is characterized.
  • FIG. 4 shows em field 80 at time t-i.
  • the electromagnetic field has a symmetry similar to that of the coil arrangement.
  • the plot of FIG. 4 illustrates the em field 80, in particular within the coil plane.
  • an electromagnetic field 80 equal to that shown in FIG. 4 also with other configurations of the coil assembly 200 that are different from those shown in FIG. 1 shown. For example, if the angles 213a-213c of adjacent coils 210a, 210b, 210c are different than 120 of FIG. 1, so can the
  • AC voltage 85 in particular a phase shift
  • the change of the adjacent angles 213a, 213b, 213c can be compensated and a situation as shown in FIG. 4 are maintained.
  • the rotation of the em field 80 is discussed below as a function of time, i. the rotating em field 80 explained.
  • the em field 80 is shown at four different times t1, t2, t3, t4 (see also FIG. 3).
  • the phase 82 of the rotating em field 80 is also plotted. An increase in phase 82 for increasing times is visible (phase accumulation).
  • the em field 80 rotates about the coil assembly 200 within the coil plane. The coil plane is therefore coincident with the plane of rotation.
  • a situation is shown where the em field 80 has a constant amplitude as a function of angle / phase, e.g.
  • the amplitude 81 of the em field 80 also have a dependence on the phase.
  • FIG. 6 is a measurement of the amplitude 81 of the magnetic field component of the em field 80 at a point P (see also FIG. 5) in the outer space of the coil arrangement 200 and, for example, plotted within the plane of rotation.
  • the amplitude 81 for a point P '(dashed line) which is spaced from the plane of rotation and whose projection in the plane of rotation is coincident with the point P.
  • the difference of the amplitude 81 between the points P and P ' is a measure of the distance of the point P' to the plane of rotation.
  • the amplitude 81 is proportional to a field strength of the em field 80. As can be seen, the amplitude varies sinusoidally (solid line). It is possible to determine a difference phase 92 with respect to a reference phase 90.
  • the reference phase 90 may be transmitted with timing information 95 by modulating the em field 80.
  • modulation techniques may be used which are selected from the following group: Frequency Modulation (FM), Phase Modulation (PM), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), Pulse Amplitude Modulation (PAM) , Pulse Code Modulation (PCM).
  • FM Frequency Modulation
  • PM Phase Modulation
  • FSK Frequency Shift Keying
  • PSK Phase Shift Keying
  • PAM Pulse Amplitude Modulation
  • PCM Pulse Code Modulation
  • other modulation techniques as are generally known to those skilled in the art, are possible.
  • the clock information 95 can also be transmitted by separate modulation of the em fields 80 emitted by the various coils 201 a, 210 b, 210 c.
  • this can mean that the phase of the em field 80 can be transmitted in a time-resolved manner.
  • Position here may denote different information depths: in particular it is e.g. it is possible to determine the position with respect to an azimuth angle in the plane of rotation with respect to the coil assembly 200 from the differential phase 92.
  • the different coordinates can be represented differently.
  • the position is not in a spherical coordinate system (distance,
  • the position can be in particular in a reference coordinate system be determined.
  • the reference coordinate system may be suitably determined with respect to the positions of the coil assembly (s) 200 or, for example, with respect to a motor vehicle by incorporating the coil assembly (s) 200.
  • the receiver 30 is arranged to measure the rotating em field 80 of the two coil assemblies 200a, 200b.
  • the receiver may e.g. one or more receiver coils (not shown in FIG. 7A).
  • the receiver is further configured to determine the difference phase 92 from this. As shown in FIG. 7A, the receiver 30 has different
  • Difference phases 91 with respect to the em fields 80 of the two coil assemblies 200a, 200b on. are both difference phases 92 determined and is the distance between the
  • Coil arrangements 200a, 200b are known, e.g. the exact position of the receiver 30 within the plane of rotation of the em fields 80 are determined by triangulation.
  • the position may be defined by the direction A and the distance a e.g. be characterized in relation to the coil arrangement 200a.
  • Differential phase 92 also a field strength of the electromagnetic field 80 or a proportional size is measured by the receiver.
  • the field strength i. for example, the amplitude of the magnetic component of the
  • FIG. 7A (Side view of FIG. 7A) illustrated by the vertical arrow. Namely, if the receiver 30 is located at a position P 'above or below the plane of rotation 300 of the rotating electromagnetic fields 80, the triangulation described above based on the difference phases 92 can unambiguously determine a projection of the position of the receiver 30 into the plane of rotation 300. Depending on the vertical spacing of the receiver 30 from the plane of rotation 300, then the field strength of the em field 80 may be greater or less (see dashed line in FIG. 6).
  • an uncertainty in the position determination can be reduced, for example, an error of the triangulation can be determined.
  • FIGS. 7A and 7B techniques for determining the position of the receiver 30 with respect to two coil assemblies 200a, 200b have been discussed, it should be understood that it is incorporated herein by reference Generally, it is possible to use more than two coil assemblies 200a, 200b. For example, if three, four or five coil arrangements are used, it may be possible to reduce an error in the determination of the position of the receiver 30.
  • the plurality of em fields 80 may be transmitted sequentially at different times (time multiplexing) or at least partially concurrently with different frequencies (frequency multiplexing). This allows the receiver 30 to assign the respectively measured em field 80 to one of the coil arrangements 200a, 200b.
  • FIG. 8A shows an electrical connection of the coil 210a.
  • the two coil windings 212a, 212b are visible.
  • the two coil windings 212a, 212b can be operated in a coupled manner by contacting at the contacts x1 and x4 (see also FIG. 1).
  • a capacitor 226 is connected in series with the two coil windings 212a, 212b.
  • a further capacitor 225 is provided in parallel with the coil winding 212a.
  • An inductance of the coil 210a is larger in the case that the coil windings 212a, 212b are coupled, than in the case where only the coil winding 212a is operated. Therefore, in particular, a resonance frequency for the former case may be lower than a resonance frequency for the latter case.
  • the resonant frequency may be determined by appropriate dimensioning of the inductances as well as the capacitance of the coil
  • Capacitor 226 may be chosen to be 125 kHz. Accordingly, a resonance frequency for an operation of the coil 210a including only the coil winding 212a and the further capacitor 225 may be set equal to 1 MHz. It is of course possible to generate other frequencies by suitably dimensioning the capacitances and inductances. The skilled person are known for this multiple techniques.
  • Series connection with capacitor 226 to be greater than for the parallel connection with the further capacitor 225.
  • applications such as the environment search of a receiver in the remote area.
  • Capacitor 224 at preferably 1 MHz may be used e.g. include a non-rotating em field. Such a scenario is characterized by low electrical power consumption, e.g. for approach recognition in the wide environment, i. for long distances up to 10 m from the motor vehicle 1, may be preferable. If the identification transmitter 30 is detected in this remote environment, then the series connection with the capacitor 226 can be activated. In this operating mode, the position and the position of the
  • Identification transmitter 30 in the vicinity eg up to 3 m from the motor vehicle 1, are determined.
  • Such a hierarchical operation can cause a lower energy consumption, which may be desirable especially in electric vehicles.
  • a decay rate of the electromagnetic field 80 may be dependent on the frequency. Thus, higher frequencies may cause a lower rate of decay of the electromagnetic field 80.
  • FIG. 8B the amplitude 81 of approximately the magnetic component of the electromagnetic field 80 is plotted over the location as a distance from the emitting coil assembly 200.
  • the solid (dashed) line illustrates the case of a comparatively low (large) resonant frequency of
  • FIG. 8C an AC source 242 connected to a supply line 241 is shown schematically.
  • the supply line 241 may be e.g. a 12V
  • FIG. 8C shows a computer unit 243, which is set up to receive control signals via a bus system 240 and, based thereon, to control the transmission of the em field 80.
  • FIGS. 9A-9F, and 10A-10D are various views of the coil assembly 200 of FIG. 1 shown in a housing 220.
  • the capacitors 225, 226 and other power electronics can also be arranged within the housing.
  • Electrical contacts 222 are shown, which can connect the coil arrangement with conductor tracks on a printed circuit board 230.
  • the contacts may be connected to AC source 242 via traces on the circuit board.
  • holders 221 are provided, which fix the coil assembly 200 stationary within the housing 220.
  • the housing may provide protection against shocks, deposits, moisture, etc. and may preferably be made of plastic.
  • An upper side of the housing 220 is not shown for reasons of clarity, but may be provided. As seen in the FIGs.
  • a top and bottom of the housing, as well as the circuit board 230 may be parallel to the plane of rotation 300 and the coil plane, respectively.
  • the special housing shape is not limiting and can be chosen differently. It should be understood that depending on the space available, different housing 220 can be preferred.
  • the housing can be mounted aligned parallel to the ground.
  • FIG. 1 an alternative embodiment of the coil assembly 200 is shown. This embodiment corresponds to an integrated design, in the conductor tracks 231 the
  • the tracks may be e.g. by etching or masking or lithography techniques.
  • Recesses 232 of the printed circuit board 230 are provided into which the coil yoke 21 1 (not shown in FIG. 11) can be inserted and fixed. This embodiment may have the effect of a particularly small footprint.
  • FIGS. 12-14 illustrate a system architecture of a location system 100 that includes at least two coil arrays 200, 200a, 200b.
  • the location system 100 may accurately determine a position of the receiver 30, such as a key to a motor vehicle.
  • the location determination can be comparatively accurate both in the exterior space and in the interior of the motor vehicle, e.g. accurate to a few centimeters.
  • the specific position of the key can be graphically displayed to the user, for example on a screen of an on-board computer of the motor vehicle 1. For this purpose rotating em fields can be generated.
  • a control unit 25 is connected to a further control unit 25a.
  • the control unit 25 may be parts of a central computer unit of the motor vehicle.
  • the control unit 25 is connected to a radio interface 31, which data transmission with the
  • the further control unit 25A is connected via data lines with door handle sensors 22 of the motor vehicle. These door handle sensors 22 may detect actuation or access desire of the closure flaps of the motor vehicle, such as doors and tailgates. In addition, the further control unit 25a is over
  • FIG. 12 the system architecture of the prior art location system is shown
  • the control unit 25a includes a
  • FIG. 13 the location system 100 according to the invention is shown schematically.
  • the coil arrangements 200a-200d can be connected via a computer unit (not shown in FIG. 13) to a bus system 240, which enables data communication with the control unit 25.
  • the bus system may e.g. be a "Controller Area Network” (CAN) bus system, "Local Interconnect Network” (LIN), or “FlexRay” or another bus system
  • the control unit 25 can send commands via the bus system 240, which are provided by the computer unit of the respective coil arrangement 200a.
  • the coil assemblies 200a-200d are arranged to generate, in response to the control signals, a rotating field 80. The energy required for this can be obtained from the supply line 241.
  • the supply line may be DC (e.g. 12 V) such that a corresponding electrical circuit, that is to say an AC voltage source, is arranged in the coil arrangements 200a-200d in order to generate therefrom the alternating voltages with a predetermined phase relationship required for the generation of the em field 80.
  • the control unit 25 control the coil assemblies 200a-200d so that the respective em fields 80 to
  • a position of the receiver 30 may then be determined.
  • the location system 100 of FIG. 13 may be compared to the system of FIG. 12 have a faster response time, since the intermediate controller 25a is omitted.
  • FIG. 14 shows the location system 100 with an arrangement in the motor vehicle 1. From FIG. 14 again shows that a control and a power supply via the separate lines 240, 241 takes place.
  • the coil assemblies 200a, 200b are installed in the right and left front doors. It would also be possible to incorporate the coil assemblies 200a, 200b in the left and right B columns and / or C columns. It could be provided modularly further coil arrangements, such as in the area of the vehicle rear.
  • FIG. 15 is a flowchart of a method for determining a position of a receiver.
  • the process starts with step S1.
  • the beginning of the method can be triggered by an external trigger signal - such a trigger signal can be, for example, the operation of a door handle or an approach detection.
  • an estimate of the position of the receiver 30 is received in step S2.
  • an estimate of the position of the receiver 30 may be provided via the optical and / or capacitive sensors 20, 21 provided in the door handles of the motor vehicle 1 (see also FIG. 13).
  • the estimation of the position of the receiver 30 may therefore include, for example, an information depth such as: "receiver 30 is located at the front left of the vehicle 1" or "receiver 30 is behind the vehicle 1".
  • step S3 the selection of the coil arrangement or the
  • Coil assemblies which are to emit subsequently the rotating em field 80, in
  • step S2 Dependence of the estimated position in step S2.
  • the receiver 30, as shown in FIG. 14, left in front of the motor vehicle 1 for example, the coil assemblies 200b and 200c may be selected - this is the case because of triangulation based on differential phases (as described above with reference to FIGS. 7A and 7B)
  • Information gain by the determination of the difference phase by means of the coil assembly 200a due to the small difference in angle to the receiver 30 relative to the coil assembly 200b is low. It would alternatively be possible, for example, all three coil arrangements 200a-200c or only the
  • step S4 a trigger signal is output via the
  • the rotating electromagnetic field 80 is generated by the corresponding coil arrangement 200a-200c in such a way that by modulation it contains both information for identifying the motor vehicle 1 and clock information 95.
  • the timing information may include a reference phase against which the difference phases are determined. It would also be possible to determine the difference phases with respect to the external trigger signal from step S1.
  • the emission of the rotating electromagnetic field 80 can be done by applying a plurality of phase-shifted alternating voltages 85 to the various coils 210a-210c of the respective coil arrangement 200a-200c and superimposing the corresponding em fields.
  • step S6 the measurement of the electromagnetic field 80 is performed. Therefore, steps S5 and S6 may be performed simultaneously, for example.
  • the measuring in step S6 may be e.g. This is the frequency-resolved inductive measurement of the amplitude 81 of the magnetic field
  • step S7 the determination of the difference phase 92 of the measured electromagnetic field 80 takes place.
  • step S7 can take place on a
  • Step S9 determining the position of the receiver based on the determined difference phases 92.
  • Step S9 may include, for example, triangulation.
  • Step S9 may be performed, for example, on a computer unit within the controller 25 or in the receiver 30
  • step S4 While a technique has been explained above in which separate trigger signals are used in step S4 to drive the various coil assemblies 200a-200c, it would also be possible to perform step S4 only once and to include in the once-sent trigger signal all information about which one
  • Coil arrangement 200a-200c to generate the electromagnetic field 80.
  • the trigger signal could initiate timers in the respective coil arrays 200a-200c; the timers would be configured such that the various coil assemblies 200a-200c emit the electromagnetic field 80 at different times.
  • step S9 may designate a different accuracy of determining the position P, P 'of the receiver 30: for example, it may be possible to transmit and measure only a rotating electromagnetic field 80 (steps S5 and S6). in that only the position P, P 'of the receiver is determined as an angle or direction A relative to the corresponding coil arrangement 200a-200c. However, if two or more rotating electromagnetic fields 80 are used, then the position P, P 'of the receiver can be determined exactly within the plane of rotation 300 of the electromagnetic fields 80: This may in particular include the distance a to a coil arrangement 200a-200c.
  • step S6 it would be possible to increase the field strength of the rotating electromagnetic field 80, i.
  • this may be e.g. a
  • Embodiment of the coil assembly 200 may be used, in which one or more coils 210a, 210b, 210c are tilted relative to the coil plane; such a case is shown for example in FIG. 2 illustrated.
  • Such a configuration may have the advantage that for positions which are equidistant from the plane of rotation but are located above or below (ie, mirror-symmetric with respect to the plane of rotation), different field strength values are measured. It can thus be determined whether the receiver 30 is above or below the plane of rotation.
  • RFID Radio Identification
  • the location system 100 for different applications, which are based on the particularly accurate position determination. So it would be e.g. it is possible, by accurately determining the position of the key 30, to allow control of the motor vehicle 1 by detecting movement of the key 30. A left-to-right movement of the key 30 could be e.g. cause a left-right rotation of the motor vehicle 1. The user could be outside the
  • Motor vehicle 1 are located and this remotely.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Divers modes de réalisation concernent un procédé de détermination de la position (P) d'un transmetteur d'identification pour un contrôle d'accès à un véhicule (1). Le procédé consiste à émettre au moins un champ électromagnétique (80) respectivement au moyen d'un émetteur (200a, 200b), une amplitude (81) du au moins un champ électromagnétique (80) tournant respectivement par rapport à l'émetteur (200a, 200b) respectif. Le procédé consiste par ailleurs à mesurer le au moins un champ électromagnétique (80) au moyen du récepteur (30) et à déterminer une phase différentielle (91). Le procédé consiste par ailleurs à déterminer la position (P) sur la base de la au moins une phase différentielle (91).
EP13753654.6A 2012-09-01 2013-08-30 Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur Withdrawn EP2890996A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012017387.3A DE102012017387A1 (de) 2012-09-01 2012-09-01 Verfahren zum Bestimmen einer Position eines Empfängers und Ortungssystem für einen Empfänger
PCT/EP2013/067969 WO2014033247A1 (fr) 2012-09-01 2013-08-30 Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur

Publications (1)

Publication Number Publication Date
EP2890996A1 true EP2890996A1 (fr) 2015-07-08

Family

ID=49080899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13753654.6A Withdrawn EP2890996A1 (fr) 2012-09-01 2013-08-30 Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur

Country Status (6)

Country Link
US (1) US9797998B2 (fr)
EP (1) EP2890996A1 (fr)
KR (1) KR101690440B1 (fr)
CN (1) CN104769453B (fr)
DE (1) DE102012017387A1 (fr)
WO (1) WO2014033247A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9815379B2 (en) 2014-01-21 2017-11-14 Qualcomm Incorporated Systems and methods for electric vehicle induction coil alignment
DE102014214671A1 (de) * 2014-07-25 2016-01-28 Siemens Aktiengesellschaft Verfahren zur Positionierung eines Elektrofahrzeugs an einer Ladestation und Positioniersystem
DE102015212782A1 (de) 2015-07-08 2017-01-12 Volkswagen Aktiengesellschaft Verfahren, Steuergerät und Fahrzeug
CN105898864A (zh) * 2016-05-30 2016-08-24 成都理想境界科技有限公司 一种定位基站、定位终端及空间定位系统
CN106383337A (zh) * 2016-10-28 2017-02-08 成都理想境界科技有限公司 一种定位基站、定位系统和定位方法
CN109029315B (zh) * 2018-06-04 2024-04-09 深圳先进技术研究院 感应器的刻度系统及其刻度方法
US10775480B2 (en) * 2018-10-30 2020-09-15 Volkswagen Ag Optimized differential evolution for radio frequency trilateration in complex environments
CN113874922B (zh) * 2019-05-29 2023-08-18 亚萨合莱有限公司 基于样本的相位差来确定移动钥匙装置的位置
CN111025231B (zh) * 2019-11-08 2021-09-14 北京交通大学 一种基于信号方向的磁感应透地定位方法
EP4024931A1 (fr) * 2021-01-05 2022-07-06 Aptiv Technologies Limited Identification de la position d'un appareil de déverrouillage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054881A (en) * 1976-04-26 1977-10-18 The Austin Company Remote object position locater
EP0581434A1 (fr) * 1992-07-09 1994-02-02 Polhemus Incorporated Procédé de compensation pour un capteur électromagnétique à distance de position et orientation
US5347289A (en) * 1993-06-29 1994-09-13 Honeywell, Inc. Method and device for measuring the position and orientation of objects in the presence of interfering metals
US5425367A (en) * 1991-09-04 1995-06-20 Navion Biomedical Corporation Catheter depth, position and orientation location system
EP1184236A2 (fr) * 2000-08-30 2002-03-06 Omron Corporation Système de radio
US20070126561A1 (en) * 2000-09-08 2007-06-07 Automotive Technologies International, Inc. Integrated Keyless Entry System and Vehicle Component Monitoring
US20090096443A1 (en) * 2007-10-11 2009-04-16 General Electric Company Coil arrangement for an electromagnetic tracking system
EP2492877A2 (fr) * 2011-02-25 2012-08-29 Kabushiki Kaisha Tokai Rika Denki Seisakusho Système de clé électronique

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US347289A (en) * 1886-08-10 Pin-tongue for breastpins
US3959889A (en) 1974-11-29 1976-06-01 Thomas Samuel M Method and apparatus for determining a measured direction relative to an external magnetic direction
US7164117B2 (en) * 1992-05-05 2007-01-16 Automotive Technologies International, Inc. Vehicular restraint system control system and method using multiple optical imagers
US7050897B2 (en) * 1992-05-05 2006-05-23 Automotive Technologies International, Inc. Telematics system
SE463895B (sv) * 1989-04-28 1991-02-04 Bofors Electronics Ab Foerfarande och anordning foer att bestaemma riktningen till en laserstraalkaella
US6148195A (en) * 1997-02-18 2000-11-14 Itt Manufacturing Enterprises, Inc. Phase agile antenna for use in position determination
DE19809058A1 (de) 1998-03-04 1999-09-09 Stn Atlas Elektronik Gmbh Verfahren zum Detektieren von Fahrzeugen
DE19941351A1 (de) * 1999-08-31 2001-03-01 Mannesmann Vdo Ag Positionserkennung für Funkschlüssel
US6963301B2 (en) 2002-08-19 2005-11-08 G-Track Corporation System and method for near-field electromagnetic ranging
JP2006118148A (ja) * 2004-10-19 2006-05-11 Sanyo Electric Co Ltd 通信管理システム、通信管理システムの通信管理方法、通信管理装置、通信装置
JP2006118889A (ja) 2004-10-19 2006-05-11 Sanyo Electric Co Ltd 位置検出システム、位置検出システムの位置検出方法、位置検出通信装置、通信装置
IL165314A (en) * 2004-11-21 2009-08-03 Elbit Ltd Electromagnetic tracker
DE102007042370A1 (de) * 2006-09-20 2008-05-15 Marquardt Gmbh Schließsystem, insbesondere für ein Kraftfahrzeug
US20080303714A1 (en) * 2007-05-29 2008-12-11 Ezal Kenan O Compact single-aperture antenna and navigation system
JP2011147104A (ja) 2009-12-18 2011-07-28 Tokai Rika Co Ltd 通信端末位置判定装置
CN102602363A (zh) * 2012-03-27 2012-07-25 华南理工大学 基于超宽带的车辆无钥匙进入、启动与闭锁方法及装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054881A (en) * 1976-04-26 1977-10-18 The Austin Company Remote object position locater
US5425367A (en) * 1991-09-04 1995-06-20 Navion Biomedical Corporation Catheter depth, position and orientation location system
EP0581434A1 (fr) * 1992-07-09 1994-02-02 Polhemus Incorporated Procédé de compensation pour un capteur électromagnétique à distance de position et orientation
US5347289A (en) * 1993-06-29 1994-09-13 Honeywell, Inc. Method and device for measuring the position and orientation of objects in the presence of interfering metals
EP1184236A2 (fr) * 2000-08-30 2002-03-06 Omron Corporation Système de radio
US20070126561A1 (en) * 2000-09-08 2007-06-07 Automotive Technologies International, Inc. Integrated Keyless Entry System and Vehicle Component Monitoring
US20090096443A1 (en) * 2007-10-11 2009-04-16 General Electric Company Coil arrangement for an electromagnetic tracking system
EP2492877A2 (fr) * 2011-02-25 2012-08-29 Kabushiki Kaisha Tokai Rika Denki Seisakusho Système de clé électronique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014033247A1 *

Also Published As

Publication number Publication date
US20150168544A1 (en) 2015-06-18
DE102012017387A1 (de) 2014-03-06
KR20150048245A (ko) 2015-05-06
CN104769453B (zh) 2017-07-28
KR101690440B1 (ko) 2017-01-09
WO2014033247A1 (fr) 2014-03-06
CN104769453A (zh) 2015-07-08
US9797998B2 (en) 2017-10-24

Similar Documents

Publication Publication Date Title
EP2891162B1 (fr) Agencement de bobine pour la génération d'un champ tournant électromagnétique et système de détermination de position d'un dispositif d'identification
EP2890996A1 (fr) Procédé pour déterminer une position d'un récepteur et système de localisation pour un récepteur
WO2018082933A1 (fr) Dispositif formant station de chargement pourvu d'une ou de plusieurs stations de chargement destiné au chargement inductif
DE102014219842A1 (de) Verfahren zur Bestimmung einer Anordnung eines Elektrofahrzeugs und Anordnungsbestimmungseinheit
DE102012214199A1 (de) Vorrichtung und Verfahren zur Positionierung durch Triangulation
DE112006001796B4 (de) Vorrichtung zur Ortung der rechten oder linken Position eines Rades eines Fahrzeugs
DE102014207412B4 (de) Verfahren zur Identifikation von Induktivladestellflächen für Fahrzeuge und Induktivladeanordnung für mehrere Induktivladestellflächen
EP2782775A1 (fr) Système de détermination de la position d'objets mobiles les uns par rapport aux autres
EP2999973A1 (fr) Appareil mobile portable et détermination de position
DE102014213195A1 (de) Vorrichtung und Verfahren zum Betreiben eines induktiven Ladesystems
DE102009020335A1 (de) Verfahren zum Lokalisieren der Stellung von Rädern eines Fahrzeugs
EP2745139A1 (fr) Procédé de détermination angulaire d'éléments mobiles et dispositif correspondant
EP3414591A1 (fr) Dispositif de représentation d'informations d'utilisateur et procédé correspondant
EP3874233B1 (fr) Dispositif de déplacement pourvu d'un système de détermination de position
WO2017005430A1 (fr) Procédé, dispositif de commande et véhicule
DE102018125379A1 (de) Vorrichtung zur Positionsbestimmung eines relativ zu einem Fahrzeug bewegbaren Gegenstandes und ein damit ausgestattetes Fahrzeug
EP3527933B1 (fr) Détermination d'une approximation
DE102016214036A1 (de) Verfahren zur Positionierung zum induktiven Laden
DE102012001899A1 (de) Rotations-Feld-Antennen-Modul, kurz RFA-Modul. Sternförmige Antenne mit Steuerungselektronik für die Erzeugung sich drehender elektromagnetischer Felder. Ein Verfahren zum Orten von beweglichen und stationären Objekten.
DE102020110220A1 (de) Vorrichtung und Verfahren zum Führen eines Elektrofahrzeugs
DE102004038837B4 (de) Elektronisches Diebstahlschutzsystem mit korrelierten Sende-/Empfangsantennen
DE102022208798A1 (de) Induktive Linearwegsensoranordnung und Verfahren zur Ermittlung einer Position eines beweglichen Körpers
WO2017137626A1 (fr) Dispositif de représentation d'informations d'utilisateur et procédé correspondant
WO2024132052A1 (fr) Dispositif d'antenne et procédé de fonctionnement pour le dispositif d'antenne pour localiser des objets, et véhicule à moteur ayant le dispositif d'antenne
DE102014225022A1 (de) Vorrichtung und Verfahren zur Steuerung einer induktiven Ladevorrichtung in einem Fahrzeug

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150401

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20160309

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20230301