CN116073533A - Wireless charging system receiving coil positioning method and system - Google Patents

Wireless charging system receiving coil positioning method and system Download PDF

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CN116073533A
CN116073533A CN202310335084.3A CN202310335084A CN116073533A CN 116073533 A CN116073533 A CN 116073533A CN 202310335084 A CN202310335084 A CN 202310335084A CN 116073533 A CN116073533 A CN 116073533A
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positioning
receiving coil
coil
wireless charging
charging system
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CN116073533B (en
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徐国宁
杨尚航
李永祥
庄春雨
杨燕初
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Aerospace Information Research Institute of CAS
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06NCOMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N3/00Computing arrangements based on biological models
    • G06N3/02Neural networks
    • G06N3/08Learning methods
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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Abstract

The invention provides a method and a system for positioning a receiving coil of a wireless charging system, which relate to the technical field of wireless power transmission, wherein the method comprises the following steps: the method comprises the steps of inputting voltage values corresponding to a plurality of auxiliary positioning coils into a positioning model, obtaining relative offset of a receiving coil relative to a transmitting coil, randomly disposing the plurality of auxiliary positioning coils in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, and training a data set by the positioning model based on a supervised learning algorithm; and positioning the receiving coil according to the relative offset. According to the characteristic that when the relative offset between the receiving and transmitting coils in the wireless charging system is different, the distribution conditions of magnetic fields generated in the space are different, the voltage value of the auxiliary positioning coil under the magnetic field is used as an intermediary to detect the different magnetic field distributions to obtain the relative offset between the receiving and transmitting coils, so that the positioning of the receiving coil is realized, and then the accurate positioning of the receiving and transmitting coils is realized.

Description

Wireless charging system receiving coil positioning method and system
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a method and a system for positioning a receiving coil of a wireless charging system.
Background
With the development of wireless power transmission technology, a wireless charging technology based on magnetic coupling resonance has become an important solution for realizing unmanned and intelligent charging in various fields.
In the charging process, accurate alignment of the receiving and transmitting coil is a key link for realizing high-efficiency wireless charging, however, the receiving and transmitting coil of a wireless charging system cannot be completely aligned due to the influence of environmental factors, positioning accuracy and the like.
Disclosure of Invention
The invention provides a method and a system for positioning a receiving coil of a wireless charging system, which are used for solving the problem that a receiving coil and a transmitting coil of the wireless charging system cannot be aligned in the prior art.
The invention provides a method for positioning a receiving coil of a wireless charging system, which comprises the following steps:
the method comprises the steps that voltage values corresponding to a plurality of auxiliary positioning coils are input into a positioning model respectively, the relative offset of a receiving coil relative to a transmitting coil is obtained, the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and positioning the receiving coil according to the relative offset.
According to the positioning method of the receiving coil of the wireless charging system provided by the invention, the relative offset comprises the following steps:
a positional offset amount and an angular offset amount.
According to the positioning method of the receiving coil of the wireless charging system provided by the invention, the positioning of the receiving coil according to the relative offset comprises the following steps:
and positioning the receiving coil according to the position offset and/or the angle offset.
According to the positioning method of the receiving coil of the wireless charging system, under the condition that the transmitting coil is determined to be excited, the data set is acquired by the following steps:
acquiring characteristic data, wherein the characteristic data are historical voltage value sets respectively corresponding to different relative offsets, the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the auxiliary positioning coils;
obtaining a label, wherein the label is the relative offset corresponding to each group of historical voltage values;
and determining the data set according to the characteristic data and the label.
According to the wireless charging system receiving coil positioning method provided by the invention, the supervised learning algorithm comprises any one of the following steps:
gaussian regression algorithm, support vector machine algorithm, decision tree algorithm and logistic regression algorithm.
The invention also provides a receiving coil positioning system of the wireless charging system, which comprises: the device comprises an acquisition module and a positioning module;
the acquisition module is used for inputting voltage values corresponding to a plurality of auxiliary positioning coils into a positioning model respectively, acquiring relative offset of a receiving coil relative to a transmitting coil, wherein the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of the wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and the positioning module is used for positioning the receiving coil according to the relative offset.
According to the wireless charging system receiving coil positioning system provided by the invention, the acquisition module is further used for:
acquiring historical voltage value sets respectively corresponding to different relative offsets, and taking the historical voltage value sets as characteristic data, wherein the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the plurality of auxiliary positioning coils;
taking the relative offset corresponding to each set of historical voltage values as a label;
and determining the data set according to the characteristic data and the label.
According to the wireless charging system receiving coil positioning system provided by the invention, the positioning module is further used for:
and positioning the receiving coil according to a position offset and/or an angle offset, wherein the relative offset comprises the position offset and the angle offset.
The invention also provides an electronic device comprising a processor and a memory storing a computer program, wherein the processor implements the wireless charging system receiving coil positioning method according to any one of the above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a wireless charging system receiving coil positioning method as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a method of positioning a receiving coil of a wireless charging system as any one of the above.
According to the method and the system for positioning the receiving coil of the wireless charging system, provided by the invention, according to the characteristics of different distribution conditions of magnetic fields generated in space when the relative offset between the receiving coil and the receiving coil in the wireless charging system is different, the voltage value of the auxiliary positioning coil under the magnetic field is used as an intermediary to detect different magnetic field distributions to obtain the relative offset between the receiving coil and the receiving coil, so that the positioning of the receiving coil is realized, and then the accurate positioning of the receiving coil and the receiving coil is realized.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for positioning a receiving coil of a wireless charging system according to the present invention;
FIG. 2 is a graph showing an example of the relative offset of a transceiver coil provided by the present invention;
FIG. 3 is a second flowchart of a method for positioning a receiving coil of a wireless charging system according to the present invention;
FIG. 4 is a schematic plan view of a magnetic coupling resonant wireless power transfer system according to the present invention;
FIG. 5 is a schematic diagram of a coil model provided by the present invention;
FIG. 6 is a schematic representation of a data set provided by the present invention;
fig. 7 is a schematic diagram of a detection result of a position shift of a transceiver coil provided by the present invention;
fig. 8 is a schematic diagram of an angle offset detection result of a transceiver coil provided by the invention;
fig. 9 is a schematic structural diagram of a receiving coil positioning system of a wireless charging system provided by the invention;
fig. 10 is a schematic diagram of the physical structure of the electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic flow chart of a method for positioning a receiving coil of a wireless charging system according to the present invention, as shown in fig. 1, the method includes:
step 110, respectively inputting voltage values corresponding to a plurality of auxiliary positioning coils into a positioning model, and obtaining relative offset of a receiving coil relative to a transmitting coil, wherein the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and step 120, positioning the receiving coil according to the relative offset.
It should be noted that, the execution subject of the above method may be a computer device.
Alternatively, the wireless charging system may be embodied as a magnetically coupled resonant wireless power transfer system.
In the magnetic coupling resonance type wireless power transmission system, the distribution conditions of magnetic fields generated in the space are different when the relative offset between the receiving and transmitting coils is different. In the magnetic field detection system, a plurality of auxiliary positioning coils are randomly distributed in a magnetic field space formed by a transmitting coil and a receiving coil of the wireless charging system, for example, a plurality of (e.g. 4, 6, 8, etc.) auxiliary positioning coils can be placed between the transmitting coil and the receiving coil, when the magnetic field intensities are different, the induced electromotive force generated by each auxiliary positioning coil is different, and the induced voltage amplitude (i.e. voltage value) of the plurality of auxiliary positioning coils is collected to obtain the magnetic field distribution condition, specifically:
in the positioning process, the transmitting coil can be excited first, the measured induction voltage amplitude values (namely voltage values) corresponding to the auxiliary positioning coils are input into a positioning model, the positioning model outputs the relative offset of the receiving coil relative to the transmitting coil, and the positioning of the receiving coil of the wireless charging system is realized based on the relative offset, wherein the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil.
According to the method for positioning the receiving coil of the wireless charging system, provided by the invention, according to the characteristics of different distribution conditions of magnetic fields generated in space when the relative offset between the receiving coil and the receiving coil in the wireless charging system is different, the voltage value of the auxiliary positioning coil under the magnetic field is used as an intermediary to detect the different magnetic field distributions to obtain the relative offset between the receiving coil and the receiving coil, so that the positioning of the receiving coil is realized, and then the accurate positioning of the receiving coil and the receiving coil is realized.
Further, in one embodiment, the relative offset may specifically include:
a positional offset amount and an angular offset amount.
Optionally, due to different application environments of the wireless charging system, the coupling structures are complex and various, plane rotation angle offset can be generated among the coupling structures, and the conventional coil positioning technology has less research on detecting the plane rotation angle offset among the coupling structures.
Exciting the transmitting coil, inputting the measured voltage values corresponding to the auxiliary positioning coils into a positioning model, and obtaining the position offset and the angle offset of the receiving coil relative to the transmitting coil, wherein the position offset is the relative offset position of the receiving coil relative to the transmitting coil, and the angle offset is the plane rotation angle offset of the receiving coil relative to the transmitting coil.
The plane rotation angle offset between the receiving coil and the transmitting coil is considered, the actual situation that the position and the direction of the charging equipment are random when the charging equipment is placed on a charging platform of the magnetic coupling resonance type wireless power transmission system is met, and the performance of positioning work of the receiving coil in the magnetic coupling resonance type wireless power transmission system is optimized. In the magnetic coupling resonance type wireless power transmission system, when the charging device is placed on the charging platform of the magnetic coupling resonance type wireless power transmission system, the vertical distance between the receiving and transmitting coils is fixed, and at this time, on the plane of the magnetic coupling resonance type wireless power transmission system, taking a plane square coil as an example, the relative offset between the receiving and transmitting coils can be decomposed into a position offset and an angle offset, as shown in fig. 2.
According to the wireless charging system receiving coil positioning method, the voltage values corresponding to the auxiliary positioning coils are input into the positioning model, so that the position offset and the angle offset between the receiving coil and the transmitting coil are respectively predicted, and the positioning accuracy of the receiving coil is further improved.
Further, in an embodiment, the positioning the receiving coil according to the relative offset may specifically include:
and positioning the receiving coil according to the position offset and/or the angle offset.
Optionally, the invention can position the receiving coil based on any one of the position offset and the angle offset output by the positioning model, can also combine the position offset and the angle offset to realize the positioning of the receiving coil, specifically selects which mode to position the receiving coil, and can select according to the positioning requirement, which is not limited in particular.
The positioning method of the receiving coil of the wireless charging system provided by the invention has the advantages that the positioning of the receiving coil is not limited by the relative offset output by the positioning model, and even if the receiving coil has the position offset and the angle offset at the same time, the receiving coil can be positioned by only outputting any offset by using the positioning model, so that the positioning method has certain flexibility.
Further, in one embodiment, in the event that determination is made to energize the transmit coil, the data set is acquired by:
acquiring characteristic data, wherein the characteristic data are historical voltage value sets respectively corresponding to different relative offsets, the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the auxiliary positioning coils;
obtaining a label, wherein the label is the relative offset corresponding to each group of historical voltage values;
and determining the data set according to the characteristic data and the label.
Optionally, before the receiving coil is positioned in real time, the data set needs to be trained based on a supervised learning algorithm to obtain a positioning model, specifically:
exciting a transmitting coil, taking a history voltage value set which is obtained by measurement and corresponds to different relative offsets respectively as characteristic data, taking the relative offset corresponding to each group of history voltage values in the history voltage value set as a label, and constructing a data set, wherein the history voltage value set is a set formed by a plurality of groups of history voltage values, and each group of history voltage values is formed by a plurality of history voltage values which are respectively corresponding to auxiliary positioning coils.
Further, in one embodiment, the supervised learning algorithm includes any of the following:
gaussian regression algorithm, support vector machine algorithm, decision tree algorithm and logistic regression algorithm.
Optionally, the supervised learning algorithm may specifically include any one of a gaussian regression algorithm, a support vector machine algorithm, a decision tree algorithm, and a logistic regression algorithm.
Fig. 3 is a second flowchart of a method for positioning a receiving coil of a wireless charging system according to the present invention, as shown in fig. 3, including: an auxiliary positioning coil is placed, taking a receiving coil as a plane square coil as an example, fig. 4 is a schematic plan view of a magnetic coupling resonance type wireless power transmission system provided by the invention as a reference plane, a longer square at the lower side represents a transmitting coil in the magnetic coupling resonance type wireless charging system, eight auxiliary positioning coils for extracting magnetic field distribution characteristics are placed above the transmitting coil between the transmitting coil and a receiving coil, and the relative positions of the auxiliary positioning coils and the transmitting coil remain unchanged during positioning work.
A plane two-dimensional rectangular coordinate system is established by taking one point on a transmitting coil as an origin, assuming that the vertical distance between receiving coils is unchanged, the abscissa (x, y) of a certain point on a receiving coil is selected to represent the position offset between the receiving coils, and the plane rotation angle is offset
Figure SMS_1
Representing the angular offset between the transmit and receive coils. Exciting the transmitting coil, collecting voltage values (namely historical voltage values) of the auxiliary positioning coil under different relative offsets, and establishing a data set taking the voltage values of the auxiliary positioning coil as characteristic data and taking the corresponding relative offsets as labels. And performing supervised learning on the data set through a supervised learning algorithm to generate a positioning model taking the voltage values of a plurality of auxiliary positioning coils as input and the relative offset as output.
The trained positioning model is applied to the positioning process, voltage values of a plurality of auxiliary positioning coils are read in real time in the positioning process, the acquired voltage values corresponding to the auxiliary positioning coils are input into the positioning model, and the positioning model outputs relative offset among the receiving coils to realize positioning of the receiving coils.
Fig. 5 is a schematic diagram of a coil model provided by the present invention, and as shown in fig. 5, the present invention uses a planar square coil as an example, and the transmit-receive coil has the same structure. The coil material is copper, the coil size is 230mm x 230mm, the number of turns is 20, the wire diameter is 3mm, the turn pitch is 2mm, the transmit coil pitch is assumed to be 20mm in this embodiment, the transmit coil excitation current amplitude is 2A, the frequency is 100KHz, and eight positioning coils are placed around the transmit coil. The positioning coil is made of copper, the coil size is 50mm multiplied by 50mm, the number of turns is 3, the wire diameter is 2mm, and the turn spacing is 1mm.
Build under the simulation conditionThe data set for generating the positioning model is erected, as shown in fig. 6, a plane two-dimensional rectangular coordinate system is established by taking a central point of a transmitting coil as an origin, taking 1cm as a unit length and taking a positive direction as shown in fig. 6, and is divided into eight subareas as shown in fig. 6, due to symmetry of square coils, the simulation case is unfolded and analyzed in one subarea, the position point of the round point in fig. 6 represents the simulation case data set, when the receiving coil has position offset, the position of the central point of the receiving coil on the coordinate system is represented by the horizontal and vertical coordinates of the central point of the receiving coil, the position offset among the receiving coil is represented by different offset position coordinates (x, y) and different angle offsets of the receiving coil relative to the transmitting coil in the subarea
Figure SMS_2
The finite element simulation is carried out on the magnetic field distribution, and the voltage values of 8 corresponding auxiliary positioning coils are the characteristic values U and the +.>
Figure SMS_3
For the corresponding tag, 66 position points are simulated at the accuracy of 1cm within the range of 0-10 cm, 90 groups of data with the accuracy of 1 degree within the range of 0-89 degrees are simulated under each position point, and the rest offset states are similar in nature due to the symmetrical characteristic of the square coil, so 5940 groups of data can be built as a data set of the simulation case:
Figure SMS_4
in the simulation case, a Gaussian process regression algorithm is selected to supervise and learn the training set, a positioning model based on data driving is generated, 1782 groups of test set data are tested, the positioning model is tested by taking offset in the direction of the X axis as an example, the detection result of the position offset is shown in fig. 7, and the detection result of the angle offset is shown in fig. 8.
According to the wireless charging system receiving coil positioning method provided by the invention, the voltage value of the auxiliary positioning coil is constructed as characteristic data according to the characteristic that the distribution condition of magnetic fields generated in space is different when the relative offset between the receiving coil and the transmitting coil in the wireless charging system is different, the corresponding relative offset is used as a data set of the tag, and a positioning model is obtained by training the data set, so that the positioning of the receiving coil is realized.
The wireless charging system receiving coil positioning system provided by the invention is described below, and the wireless charging system receiving coil positioning system described below and the wireless charging system receiving coil positioning method described above can be correspondingly referred to each other.
Fig. 9 is a schematic structural diagram of a receiving coil positioning system of a wireless charging system provided by the invention, as shown in fig. 9, including:
an acquisition module 910 and a positioning module 911;
the obtaining module 910 is configured to input voltage values corresponding to a plurality of auxiliary positioning coils into a positioning model, obtain relative offsets of a receiving coil relative to a transmitting coil, where the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of the wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
the positioning module 911 is configured to position the receiving coil according to the relative offset.
Further, in an embodiment, in a case where it is determined to excite the transmitting coil, the acquiring module 910 may further specifically be configured to:
acquiring historical voltage value sets respectively corresponding to different relative offsets, and taking the historical voltage value sets as characteristic data, wherein the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the plurality of auxiliary positioning coils;
taking the relative offset corresponding to each set of historical voltage values as a label;
and determining the data set according to the characteristic data and the label.
Further, in one embodiment, the positioning module 911 may be further specifically configured to:
and positioning the receiving coil according to a position offset and/or an angle offset, wherein the relative offset comprises the position offset and the angle offset.
According to the wireless charging system receiving coil positioning system provided by the invention, according to the characteristics of different distribution conditions of magnetic fields generated in space when the relative offset between receiving coils in the wireless charging system is different, the voltage value of the auxiliary positioning coil under the magnetic field is used as an intermediary to detect different magnetic field distributions to obtain the relative offset between the receiving coils, so that the positioning of the receiving coils is realized, and then the accurate positioning of the receiving coils is realized.
Fig. 10 is a schematic diagram of an entity structure of an electronic device according to the present invention, as shown in fig. 10, the electronic device may include: a processor (processor) 1010, a communication interface (communication interface) 1011, a memory (memory) 1012 and a bus (bus) 1013, wherein the processor 1010, the communication interface 1011, and the memory 1012 communicate with each other through the bus 1013. The processor 1010 may call logic instructions in the memory 1012 to perform the following methods:
the method comprises the steps that voltage values corresponding to a plurality of auxiliary positioning coils are input into a positioning model respectively, the relative offset of a receiving coil relative to a transmitting coil is obtained, the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and positioning the receiving coil according to the relative offset.
Further, the logic instructions in the memory described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer power supply screen (which may be a personal computer, a server, or a network power supply screen, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Further, the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the wireless charging system receiving coil positioning method provided in the above method embodiments, for example, comprising:
the method comprises the steps that voltage values corresponding to a plurality of auxiliary positioning coils are input into a positioning model respectively, the relative offset of a receiving coil relative to a transmitting coil is obtained, the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and positioning the receiving coil according to the relative offset.
In another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the wireless charging system receiving coil positioning method provided in the above embodiments, for example, including:
the method comprises the steps that voltage values corresponding to a plurality of auxiliary positioning coils are input into a positioning model respectively, the relative offset of a receiving coil relative to a transmitting coil is obtained, the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and positioning the receiving coil according to the relative offset.
The system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer power screen (which may be a personal computer, a server, or a network power screen, etc.) to perform the method described in the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for positioning a receiving coil of a wireless charging system, comprising:
the method comprises the steps that voltage values corresponding to a plurality of auxiliary positioning coils are input into a positioning model respectively, the relative offset of a receiving coil relative to a transmitting coil is obtained, the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of a wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and positioning the receiving coil according to the relative offset.
2. The wireless charging system receiving coil positioning method of claim 1, wherein the relative offset comprises:
a positional offset amount and an angular offset amount.
3. The method of positioning a receiver coil of a wireless charging system according to claim 2, wherein positioning the receiver coil according to the relative offset comprises:
and positioning the receiving coil according to the position offset and/or the angle offset.
4. The wireless charging system receiving coil positioning method according to claim 1, wherein in case it is determined to energize the transmitting coil, the data set is acquired by:
acquiring characteristic data, wherein the characteristic data are historical voltage value sets respectively corresponding to different relative offsets, the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the auxiliary positioning coils;
obtaining a label, wherein the label is the relative offset corresponding to each group of historical voltage values;
and determining the data set according to the characteristic data and the label.
5. The wireless charging system receiving coil positioning method according to claim 1, wherein the supervised learning algorithm includes any one of:
gaussian regression algorithm, support vector machine algorithm, decision tree algorithm and logistic regression algorithm.
6. A wireless charging system receiving coil positioning system, comprising: the device comprises an acquisition module and a positioning module;
the acquisition module is used for inputting voltage values corresponding to a plurality of auxiliary positioning coils into a positioning model respectively, acquiring relative offset of a receiving coil relative to a transmitting coil, wherein the plurality of auxiliary positioning coils are randomly deployed in a magnetic field space formed by the transmitting coil and the receiving coil of the wireless charging system, the positioning model is obtained after training a data set based on a supervised learning algorithm, and the data set is obtained after exciting the transmitting coil;
and the positioning module is used for positioning the receiving coil according to the relative offset.
7. The wireless charging system receiving coil positioning system of claim 6, wherein in the event that determination is made to energize the transmit coil, the acquisition module is further configured to:
acquiring historical voltage value sets respectively corresponding to different relative offsets, and taking the historical voltage value sets as characteristic data, wherein the historical voltage value sets comprise a plurality of groups of historical voltage values, and each group of historical voltage values comprises historical voltage values respectively corresponding to the plurality of auxiliary positioning coils;
taking the relative offset corresponding to each set of historical voltage values as a label;
and determining the data set according to the characteristic data and the label.
8. The wireless charging system receiving coil positioning system of claim 6, wherein the positioning module is further configured to:
and positioning the receiving coil according to a position offset and/or an angle offset, wherein the relative offset comprises the position offset and the angle offset.
9. An electronic device comprising a processor and a memory storing a computer program, characterized in that the processor implements the wireless charging system receiving coil positioning method of any one of claims 1 to 5 when executing the computer program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a wireless charging system receiving coil positioning method according to any of claims 1 to 5.
CN202310335084.3A 2023-03-31 2023-03-31 Wireless charging system receiving coil positioning method and system Active CN116073533B (en)

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CN114530950A (en) * 2022-04-08 2022-05-24 北京理工大学 Single-coil space positioning method and device, terminal equipment and storage medium
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CN109733216A (en) * 2018-11-29 2019-05-10 中海阳能源集团股份有限公司 A kind of Wireless charging coil alignment system based on automatic parking technology
CN109682292A (en) * 2018-12-29 2019-04-26 北京酷能科技有限公司 A kind of bias detecting method, device and wireless charging system
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