CN111293789B

CN111293789B - Detection device and method, wireless power transmitting device and wireless power receiving device

Info

Publication number: CN111293789B
Application number: CN202010102998.1A
Authority: CN
Inventors: 陈振升; 朱勇发; 冯绍杰; 丁涛; 文冲; 诸祺
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2022-04-08
Anticipated expiration: 2040-02-19
Also published as: CN111293789A

Abstract

The embodiment of the application discloses a detection device and a method, a wireless electric energy transmitting device and a wireless electric energy receiving device, when there is a deviation or a foreign object between the transmitting coil module and the receiving coil module during the charging of the receiving coil module by the transmitting coil module, a magnetic field formed between the transmitting coil module and the receiving coil module is distorted, thereby causing the uneven distribution of the magnetic field between the forward coil and the reverse coil in the detection coil, the deviation information and the foreign matter information between the transmitting coil and the receiving coil can be determined according to the induction signal generated by the detection coil in the first magnetic field and the induction signal of the phase reference coil in the magnetic field, the detection device is applied to a wireless charging scene, and can further feed the deviation information and the foreign matter information back to a user so as to improve the wireless charging performance and the user experience.

Description

Detection device and method, wireless power transmitting device and wireless power receiving device

Technical Field

The present application relates to the field of wireless charging technologies, and in particular, to a detection device and method, a wireless power transmitting device, and a wireless power receiving device.

Background

In recent years, consumer electronic products are greatly developed and popularized, portable electronic products bring great convenience to life of people, but different charging adapters are configured for different products, the universality of the adapters among various manufacturers is poor due to the factors of non-universal interfaces, incompatible power and the like, and meanwhile, the convenience is greatly reduced due to the fact that the number of wires in a wire charging mode is too large, wires need to be plugged in and pulled out during charging and the like.

In the prior art, the wireless charging technology can solve the inconvenience of the conventional contact type power transmission technology by taking the advantage that cable connection between a power supply and a load is not required to be established, wherein a common mode for realizing wireless charging power transmission is generally an electromagnetic induction type, and in an electromagnetic induction type wireless charging device, a transmitting coil in the device has alternating current with a certain frequency, and generates a certain current in a receiving coil through electromagnetic induction, so that energy is transferred from a charging device where the transmitting coil is located to the load where the receiving coil is located, and a wireless charging process for the load is realized.

However, in the above process of implementing wireless charging by electromagnetic induction, when the transmitting coil in the wireless charging device is misaligned with the receiving coil in the load, the coupling factor between the transmitting coil and the receiving coil is reduced, which easily causes problems of low charging efficiency, heat generation during charging, and the like, and seriously affects the wireless charging experience, and further, similar problems may occur if there is a foreign object in the transmitting coil in the wireless charging device and the receiving coil in the load.

Disclosure of Invention

The embodiment of the application provides a detection device and method, a wireless electric energy transmitting device and a wireless electric energy receiving device, and the detection device and method are used for detecting deviation information between a transmitting coil module and a receiving coil module in a wireless charging scene, and subsequently, the detected deviation information can be fed back to a user, so that after the user corrects the deviation, the wireless charging efficiency is increased, the charging heating is avoided, and the wireless charging experience is improved.

The first aspect of the embodiments of the present application provides a detection device, a wireless charging process is implemented, that is, in a charging process performed on a wireless power transmitting device to a wireless power receiving device by a wireless power transmitting device, if a transmitting coil module located in the transmitting device is misaligned with a receiving coil module located in the receiving device, because a magnetic field between the transmitting coil module and the receiving coil module is correspondingly offset, magnetic field distribution between two coils is not uniform, which easily causes problems of low charging efficiency, heat generation, and the like, in order to avoid the influence caused by such a situation, the offset information between the transmitting coil module and the receiving coil module can be detected by the detection device, wherein the device includes: the detection coil comprises a forward coil and a reverse coil which are connected with each other, wherein the forward coil is not completely overlapped with the reverse coil; in the process that the transmitting coil module charges the receiving coil module, the phase reference coil is at least partially positioned in a first area, and the detection coil is at least partially positioned in a second area, wherein the first area is an area where the transmitting coil module generates a first magnetic field, and the second area is an area where the transmitting coil module and the receiving coil module are overlapped; when the first magnetic field is unevenly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the backward coil in the first magnetic field is greater than a first preset threshold value, and at this time, it can be determined that a deviation exists between the transmitting coil module and the receiving coil module; when the first magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the reverse coil in the first magnetic field is less than or equal to a first preset threshold value, and at this time, it can be determined that no offset exists between the transmitting coil module and the receiving coil, that is, the transmitting coil module is right opposite to the receiving coil module; in addition, the processor in the detection device is respectively connected with the phase reference coil and the detection coil and is used for detecting a first induction signal generated by the phase reference coil in the first magnetic field and a second induction signal generated by the detection coil in the first magnetic field and determining the deviation information between the transmitting coil module and the receiving coil module according to the first induction signal and the second induction signal. Therefore, the deviation information of the deviation between the transmitting coil and the receiving coil can be determined according to the second induction signal generated by the detecting coil in the first magnetic field and the first induction signal of the phase reference coil in the magnetic field, the detecting device is applied to a wireless charging scene, the deviation information can be further fed back to a user so that the user can know the position information and adjust the position of the wireless charging transmitting device and/or the wireless charging receiving device, or the position can be automatically adjusted by the wireless charging transmitting device and/or the wireless charging receiving device where the detecting device is located through a moving device (such as an electric motor) and the like, so that the deviation state is eliminated or the deviation distance is reduced, and the purposes of improving the wireless charging performance and user experience are achieved.

The shape of the forward coil and the backward coil in the phase reference coil and the detection coil may be any shape such as a circle, a rectangle, an ellipse, or a polygon, and is not limited herein.

In a possible implementation manner of the first aspect of the embodiment of the present application, the offset information may be specifically embodied by an offset angle, and the processor may determine a first phase for detecting that the phase reference coil generates the first induction signal in the first magnetic field, and detect a second phase for detecting that the detection coil generates the second induction signal in the first magnetic field; the processor further determines an offset angle of the offset between the transmitting coil module and the receiving coil module according to the first phase and the second phase. The processor may execute the processing procedure in this embodiment through various implementation manners such as a hardware module and a software module, for example, the processor may include a first signal processing unit and a first phase detection unit, and in the implementation procedure of this embodiment, the first phase detection unit is respectively connected to the phase reference coil and the detection coil; the first phase detection unit is used for detecting a first phase of a first induction signal generated by the phase reference coil in the first magnetic field and detecting a second phase of a second induction signal generated by the detection coil in the first magnetic field in the process of charging the receiving coil module by the transmitting coil module; the first signal processing unit is connected with the first phase detection unit and used for determining a deviation angle of deviation between the transmitting coil module and the receiving coil module according to the first phase and the second phase.

In this embodiment, the processor in the detection apparatus may specifically determine a first phase of the first sensing signal and a second phase of the second sensing signal, and then determine an offset angle between the transmitting coil module and the receiving coil module according to the first phase and the second phase, so as to provide a specific implementation manner for determining offset information.

In a possible implementation manner of the first aspect of the embodiment of the present application, the offset information may be embodied by an offset distance, and the processor may determine a second amplitude value for detecting that the phase reference coil generates the second induction signal in the first magnetic field, and further determine, according to the second amplitude value, the offset distance in which the offset exists between the transmitting coil module and the receiving coil module. The processor may execute the processing procedure in this embodiment through various implementation manners such as a hardware module and a software module, and exemplarily, the processor may further include a first amplitude detection unit, where the first amplitude detection unit is connected to the detection coil; in the implementation process of this embodiment, in the process that the transmitting coil module charges the receiving coil module, the first amplitude detection unit is configured to detect a second amplitude of the second sensing signal; the first signal processing unit is connected with the first amplitude detection unit, and is further used for determining an offset distance of an offset between the transmitting coil module and the receiving coil module according to the second amplitude, and the magnitude of the offset distance is in positive correlation with the magnitude of the second amplitude.

In this embodiment, the processor in the detection apparatus may specifically detect the amplitude of the second sensing signal, and then determine the offset distance between the transmitting coil module and the receiving coil module according to the amplitude, so as to provide another specific implementation manner of determining the offset information.

In a possible implementation manner of the first aspect of the embodiment of the present application, if a foreign object exists between the transmitting coil module and the receiving coil module, the magnetic field distribution between the transmitting coil module and the receiving coil module is also uneven, in order to avoid an influence of the foreign object on an offset detection result, in a process that the transmitting coil module charges the receiving coil module, an exciting coil is disposed, in a process that the transmitting coil module charges the receiving coil module, the phase reference coil is at least partially located in a third area, the third area is an area where the exciting coil generates a second magnetic field, the exciting coil generates the second magnetic field between the transmitting coil module and the receiving coil module, and a second frequency of the second magnetic field is different from a first frequency of the first magnetic field; when the second magnetic field is unevenly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is greater than a second preset threshold value, and at this time, it can be determined that a foreign object exists between the transmitting coil module and the receiving coil module; when the second magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is less than or equal to a second preset threshold value, and at this time, it can be determined that no foreign matter exists between the transmitting coil module and the receiving coil module; the processor is further configured to detect a third induction signal generated by the phase reference coil in the second magnetic field and a fourth induction signal generated by the detection coil in the second magnetic field, and determine foreign object information of the foreign object according to the third induction signal and the fourth induction signal.

In this embodiment, an excitation coil having a magnetic field frequency different from that of the transmitting coil may be arranged to form a second magnetic field, a processor may be configured to detect a third inductive signal generated by the phase reference coil in the second magnetic field and a fourth inductive signal generated by the detection coil in the second magnetic field, and determine foreign object information between the transmitting coil module and the receiving coil module according to the third signal and the fourth signal, and then the processor may determine the foreign object information between the transmitting coil module and the receiving coil module according to the third inductive signal and the fourth inductive signal through a signal processing unit, so as to implement foreign object detection between the transmitting coil and the receiving coil and avoid affecting the misalignment detection process.

In a possible implementation manner of the first aspect of the embodiment of the present application, in order to distinguish between an induced signal generated by the detection coil and the phase reference coil in the first magnetic field and an induced signal generated by the phase reference coil in the second magnetic field, since the first frequency of the first magnetic field is different from the second frequency of the second magnetic field, the processor may determine a third induced signal generated by the phase reference coil in the second magnetic field, and a fourth induced signal generated by the detection coil in the second magnetic field; detecting a third phase of the third sensing signal and detecting a fourth phase of the fourth sensing signal; the processor is further configured to determine an area of a foreign object between the transmitter coil module and the receiver coil module according to the third phase and the fourth phase. The processor may execute the processing procedure in this embodiment through various implementation manners such as a hardware module and a software module, for example, a filtering unit may be additionally disposed in the processor, wherein in the implementation procedure of this embodiment, the processor may further include a second phase detection unit, a second signal processing unit, and a first filtering unit; the first filtering unit is respectively connected with the phase reference coil and the detection coil, and is used for determining a third induction signal generated by the phase reference coil in the second magnetic field and a fourth induction signal generated by the detection coil in the second magnetic field; the second phase detection unit is connected with the first filtering unit and is used for detecting a third phase of the third induction signal and a fourth phase of the fourth induction signal; the second signal processing unit is connected with the second phase detection unit and used for determining the area of the foreign matter between the transmitting coil module and the receiving coil module according to the third phase and the fourth phase.

In this embodiment, in order to distinguish between the induced signal generated by the detection coil and the phase reference coil in the first magnetic field and the induced signal generated by the phase reference coil in the second magnetic field, the processor may determine a third phase corresponding to a third induced signal generated by the phase reference coil in the second magnetic field and a fourth phase corresponding to a fourth induced signal generated by the detection coil in the second magnetic field, and then determine the region where the foreign object is located between the transmission coil module and the reception coil module according to the third phase and the fourth phase.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the excitation coil and the transmission coil operate simultaneously, in order to further distinguish and implement the deviation detection and the foreign object detection, a second filtering unit may be additionally provided on the basis of the first filtering unit, where the processor may further include a third signal processing unit, a third phase detection unit, and a second filtering unit; the second filtering unit is respectively connected with the phase reference coil and the detection coil, and is used for determining a fifth induction signal generated by the phase reference coil in the first magnetic field and a sixth induction signal generated by the detection coil in the first magnetic field; the third phase detection unit is connected with the second filtering unit and is used for detecting a fifth phase of the fifth induction signal and a sixth phase of the sixth induction signal; the third signal processing unit is connected with the first phase detection unit, and the third signal processing unit is used for determining deviation information between the transmitting coil module and the receiving coil module according to the third phase and the fourth phase, wherein the deviation information comprises a deviation angle.

In this embodiment, when the excitation coil and the transmission coil operate simultaneously, in order to further distinguish and implement the deviation detection and the foreign object detection, a second filtering unit may be additionally disposed on the basis of the first filtering unit, that is, the fifth inductive signal generated by the phase reference coil in the first magnetic field and the sixth inductive signal generated by the detection coil in the first magnetic field are determined by the second filtering unit, and subsequently, a similar process is used to implement the determination of the deviation angle between the transmission coil module and the reception coil module, that is, the detection of the deviation is implemented while implementing the foreign object detection.

In a possible implementation manner of the first aspect of the embodiment of the present application, the eddy-current demagnetizing field generated by different foreign objects in the second magnetic field may be different in size, and the size of the eddy-current demagnetizing field generated by the foreign object may be further determined through amplitude detection, that is, the processor is further configured to detect a fourth amplitude of the fourth induction signal, and determine the size of the eddy-current demagnetizing field generated by the foreign object between the excitation coil and the receiving coil according to the fourth amplitude, where the size of the eddy-current demagnetizing field generated by the foreign object and the size of the fourth amplitude are in a positive correlation relationship. The processor may execute the processing procedure in this embodiment through various implementation manners such as a hardware module and a software module, and may further include a second amplitude detection unit, for example; the second amplitude detection unit is connected with the second filtering unit and is used for detecting a fourth amplitude of the fourth induction signal; the second signal processing unit is connected with the second amplitude detection unit and used for determining the size of an eddy diamagnetic field generated by the foreign matter between the exciting coil and the receiving coil according to the fourth amplitude, and the size of the eddy diamagnetic field generated by the foreign matter is in positive correlation with the size of the fourth amplitude.

In this embodiment, the processor may further determine the size of the eddy-current diamagnetic field generated by the foreign object between the excitation coil and the receiving coil, so as to calculate the size of the foreign object roughly, and further improve the determination process of the foreign object information.

In a possible implementation manner of the first aspect of the embodiment of the present application, the detection coils may be implemented as one or more sets, and when the detection coils are implemented as multiple sets, the detection coils at least include a first detection coil and a second detection coil, the first detection coil includes a first forward coil and a first backward coil, and the second detection coil includes a second forward coil and a second backward coil; an included angle between a first connecting line between the center of the first forward coil and the center of the first backward coil and a second connecting line between the center of the second forward coil and the center of the second backward coil is n, wherein n is greater than 0 degree and less than 180 degrees; when the first magnetic field is unevenly distributed in the direction of the first connecting line in the second area, the sum of the induced voltage value of the first forward coil in the first magnetic field and the induced voltage value of the first reverse coil in the first magnetic field is greater than the first preset threshold value, and at the moment, the transmitting coil module and the receiving coil module can be determined to have deviation in the direction of the first connecting line; when the first magnetic field is uniformly distributed in the direction of the first connecting line in the second area, the sum of the induced voltage value of the first forward coil in the first magnetic field and the induced voltage value of the first reverse coil in the first magnetic field is less than or equal to the first preset threshold, and at the moment, it can be determined that the transmitting coil module and the receiving coil module are not offset in the direction of the first connecting line; when the first magnetic field is unevenly distributed in the direction of the second connecting line in the second area, the sum of the induced voltage value of the second forward coil in the first magnetic field and the induced voltage value of the second reverse coil in the first magnetic field is greater than the first preset threshold value, and at the moment, the deviation of the transmitting coil module and the receiving coil module in the direction of the second connecting line can be determined; when the first magnetic field is unevenly distributed in the direction of the second connecting line in the second region, the sum of the induced voltage value of the second forward coil in the first magnetic field and the induced voltage value of the second backward coil in the first magnetic field is less than or equal to the first preset threshold, and at this time, it can be determined that the transmitting coil module is not offset from the receiving coil module in the direction of the second connecting line.

In this embodiment, when the detection coils are arranged in multiple groups, the detection coils at least include a first detection coil and a second detection coil, the first detection coil includes a first forward coil and a first backward coil, the second detection coil includes a second forward coil and a second backward coil, at this time, an included angle between a first connecting line between a center of the first forward coil and a center of the first backward coil and a second connecting line between a center of the second forward coil and a center of the second backward coil is n, n is greater than 0 ° and n is less than 180 °, so that after the deviation information is obtained, the deviation information in at least two directions corresponding to the first connecting line and the second connecting line can be further determined by combining the multiple groups of forward coils and the backward coils which are arranged oppositely, that is, more accurate detection of the deviation information is realized.

In a possible implementation manner of the first aspect of the embodiment of the present application, a first connection line between the center of the first forward coil and the center of the first backward coil is perpendicular to a second connection line between the center of the second forward coil and the center of the second backward coil.

In this embodiment, when the detection coils at least include a first detection coil and a second detection coil, a first connection line between the center of the first forward coil and the center of the first backward coil may be perpendicular to a second connection line between the center of the second forward coil and the center of the second backward coil, so that the offset information of the receiving coil module on the plane where the transmitting coil module is located may be implemented to the minimum.

In a possible implementation manner of the first aspect of the embodiment of the present application, the transmitting coil module further includes a first magnetic material, and the detecting coil and the phase reference coil are located between the first magnetic material and the receiving coil module.

In this embodiment, the transmitting coil module may further include a first magnetic material, and the first magnetic material is used to shield interference of other circuits in the wireless power transmitting device where the magnetic field transmitting coil module is located, so that the detecting coil and the phase reference coil may be disposed between the first magnetic material and the receiving coil module, and the shielding influence of the first magnetic material on the detecting coil and the phase reference coil is avoided.

In a possible implementation manner of the first aspect of the embodiment of the present application, the receiving coil module includes a second magnetic material, and the detecting coil and the phase reference coil are located between the first magnetic material and the second magnetic material.

In this embodiment, the transmitting coil module may also include a second magnetic material, and the first magnetic material is used to shield interference of other circuits in the wireless power receiving device where the magnetic field receiving coil module is located, so that the detecting coil and the phase reference coil may be disposed between the first magnetic material and the second magnetic material, and the shielding influence of the second magnetic material on the detecting coil and the phase reference coil is avoided.

A second aspect of the embodiments of the present application provides a wireless power transmitting apparatus, including the detecting apparatus and the transmitting coil module described in the foregoing first aspect and any one of the foregoing embodiments; the detecting device is arranged between the transmitting coil module and the receiving coil module in the process that the transmitting coil module charges the receiving coil module, the detecting device is used for determining deviation information between the transmitting coil module and the receiving coil module, and the receiving coil module is contained in a wireless energy receiving device.

A third aspect of the embodiments of the present application provides a wireless power receiving apparatus, including the detecting apparatus, the receiving coil module, and the control unit as described in the foregoing first aspect and any one of the foregoing embodiments; the detection device is positioned between the transmitting coil module and the receiving coil module in the process that the transmitting coil module charges the receiving coil module, the detection device is used for determining deviation information between the transmitting coil module and the receiving coil module, and the transmitting coil module is contained in the wireless power transmitting device.

A fourth aspect of the embodiments of the present invention provides a detection method, which is implemented in a wireless charging process, that is, in a process of charging a wireless power transmitting end to a wireless power receiving end, if a transmitting coil module located in the transmitting end and a receiving coil module located in the receiving end are not aligned correctly, and a magnetic field between the transmitting coil module and the receiving coil module is shifted accordingly, so that a magnetic field between the two coil modules is not distributed uniformly, which is prone to cause problems of low charging efficiency and heat generation, and in order to avoid the influence caused by this situation, offset information between the transmitting coil module and the receiving coil module can be detected by the detection method, wherein the method is applied to a processor, the processor includes a detection coil and a phase reference coil, the detection coil includes a forward coil and a reverse coil connected to each other, the method comprises the following steps: the processor detects a first induction signal generated by the phase reference coil in a first magnetic field, and in the process that the transmitting coil module charges the receiving coil module, the phase reference coil is at least partially positioned in a first area, and the detection coil is at least partially positioned in a second area, wherein the first area is an area where the transmitting coil module generates the first magnetic field, and the second area is an area where the transmitting coil module and the receiving coil module are overlapped; specifically, when the first magnetic field is unevenly distributed in the second region, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the backward coil in the first magnetic field is greater than a first preset threshold, and it can be determined that there is a misalignment between the transmitting coil module and the receiving coil module; when the first magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the reverse coil in the first magnetic field is less than or equal to a first preset threshold value, and at this time, it can be determined that no offset exists between the transmitting coil module and the receiving coil, that is, the transmitting coil module is right opposite to the receiving coil module; thereafter, the processor detects a second induction signal generated by the detection coil in the first magnetic field; the processor determines deviation information of the deviation according to the first induction signal and the second induction signal. Therefore, the processor can determine the deviation information between the transmitting coil and the receiving coil according to the second induction signal generated by the detecting coil in the first magnetic field and the first induction signal of the phase reference coil in the magnetic field, and can further feed the deviation information back to the user, so that the user can correct the deviation, the wireless charging efficiency is improved, the heating is reduced, and the wireless charging experience is improved.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the processor may determine the offset angle in the offset information by using the first sensing signal and the first sensing signal, where the first sensing signal includes a first phase, the second sensing signal includes a second phase, and the determining, by the processor, the offset information between the transmitting coil module and the receiving coil module according to the first sensing signal and the second sensing signal includes: the processor determines an offset angle between the transmitting coil module and the receiving coil module according to the first phase and the second phase.

In this embodiment, a processor may specifically detect a first phase of a first induction signal generated by the phase reference coil in the first magnetic field and a second phase of a second induction signal generated by the detection coil in the first magnetic field to determine an offset angle between the transmission coil module and the reception coil module, so as to implement detection of the offset angle in the offset information in the wireless charging process.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the processor may determine the offset distance in the offset information by using the second sensing signal, where the second sensing signal includes a second amplitude, and the determining, by the processor, the offset information between the transmitting coil module and the receiving coil module according to the first sensing signal and the second sensing signal includes: the processor determines the offset distance between the transmitting coil module and the receiving coil module according to the second amplitude, and the magnitude of the offset distance is in positive correlation with the magnitude of the second amplitude.

In this embodiment, the processor may specifically detect a second amplitude of a second induction signal generated by the detection coil in the first magnetic field to determine an offset distance between the transmission coil module and the reception coil module, so as to implement detection of the offset distance in the offset information in the wireless charging process.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, in order to distinguish between an induced signal generated by the detection coil and the phase reference coil in the first magnetic field and an induced signal generated by the excitation coil in the corresponding second magnetic field, the method further includes: in the process that the transmitting coil module charges the receiving coil module, the processor detects that the phase reference coil generates a third induction signal in a second magnetic field, the phase reference coil is at least partially located in a third area, the third area is an area where the exciting coil generates a second magnetic field, the exciting coil generates the second magnetic field between the transmitting coil module and the receiving coil module, and the second frequency of the second magnetic field is different from the first frequency of the first magnetic field; when the second magnetic field is unevenly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is greater than a second preset threshold value, and at this time, it can be determined that a foreign object exists between the transmitting coil module and the receiving coil module; when the second magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is less than or equal to a second preset threshold value, and at this time, it can be determined that no foreign matter exists between the transmitting coil module and the receiving coil module; thereafter, the processor may detect that the detection coil generates a fourth sensing signal in the second magnetic field, and determine the foreign object information of the foreign object according to the third sensing signal and the fourth sensing signal.

In this embodiment, in order to distinguish the induced signal generated by the detection coil and the phase reference coil in the first magnetic field from the induced signal generated by the phase reference coil in the second magnetic field, the foreign object signal between the excitation coil and the receiving coil can be determined by the third induced signal generated by the phase reference coil in the second magnetic field and the fourth induced signal generated by the detection coil in the second magnetic field, so as to detect the foreign object between the transmission coil and the receiving coil and avoid affecting the process corresponding to the deviation detection method.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, in the process of detecting a foreign object, a region where the foreign object is located between the transmitting coil module and the receiving coil module may be further determined, where the third sensing signal includes a third phase, the fourth sensing signal includes a fourth phase, and the processor determines, according to the third sensing signal and the fourth sensing signal, that the foreign object information between the transmitting coil module and the receiving coil module includes: the processor determines the area of the foreign object between the transmitting coil module and the receiving coil module according to the third phase and the fourth phase.

In this embodiment, the region where the foreign object is located between the excitation coil and the receiving coil may be determined according to a third phase of a third induction signal generated in the second magnetic field by the phase reference coil and a fourth phase of a fourth induction signal generated in the second magnetic field by the detection coil.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, during the process of detecting the foreign object, the size of an eddy diamagnetic field generated by the foreign object between the transmitting coil module and the receiving coil module can be further determined, where the fourth induction signal includes a fourth amplitude, and the processor determines that the foreign object information between the transmitting coil module and the receiving coil module according to the third induction signal and the fourth induction signal includes: the processor determines the size of an eddy current counter-magnetic field generated by the foreign matter between the transmitting coil module and the receiving coil module according to the fourth amplitude, and the size of the eddy current counter-magnetic field generated by the foreign matter is in positive correlation with the size of the fourth amplitude.

In this embodiment, the magnitude of the eddy-current diamagnetic field generated by the foreign object between the exciting coil and the receiving coil can be determined by the fourth amplitude of the fourth induction signal, so that the magnitude of the foreign object can be roughly calculated, and the determination process of the foreign object information is further improved.

In a fifth aspect of the embodiments of the present application, a signal processing method is provided for realizing a wireless charging process, that is, in a process of charging a wireless power transmitting end to a wireless power receiving end, if a transmitting coil module located in the transmitting end and a receiving coil module located in the receiving end are not aligned correctly, and a magnetic field between the transmitting coil module and the receiving coil module is shifted accordingly, so that a magnetic field between the two coil modules is not distributed uniformly, which is prone to cause problems of low charging efficiency and heat generation, and in order to avoid an influence caused by the misalignment, misalignment information between the transmitting coil module and the receiving coil module can be detected, and after the misalignment information is obtained, the signal processing method is used for optimizing a process of presenting the misalignment information to a user, wherein the signal processing method is applied to a processor included in a wireless power transmitting device, the wireless power transmitting device comprises a transmitting coil module, and the method comprises the following steps: the processor acquires initial deviation information between the transmitting coil module and the receiving coil module, and the receiving coil module is contained in the wireless energy receiving device; the processor determines a first association relationship between the initial offset information and a first device orientation of the wireless power transmitting apparatus; the processor acquires a second association relation between the orientation of the first equipment of the wireless power transmitting device and the direction of the geomagnetic field; the processor sends the first incidence relation and the second incidence relation to the wireless energy receiving device, and then the wireless energy receiving device can determine a fourth incidence relation between the initial deviation information and the orientation of the second equipment of the wireless energy receiving device according to the first incidence relation and the second incidence relation and by combining a third incidence relation between the orientation of the second equipment of the wireless energy receiving device and the direction of the geomagnetism, so that the fourth incidence relation is displayed for a user to realize optimization of the presentation of the deviation information, the user can vividly know the deviation information, the user can correct the deviation, the efficiency of wireless charging is improved, heating is reduced, and the wireless charging experience is improved.

It should be noted that the initial offset information may indicate an offset angle, an offset distance, or other offset information between the transmitting coil module and the receiving coil module, and the initial offset information obtaining process may be implemented through the first aspect to the fourth aspect of the embodiment of the present application, or may be obtained through other manners, which is not limited herein. The first, second, third, and fourth correlations may be expressed by angular relationships between the respective positions, or by vector relationships between the respective positions, and are not limited herein.

A sixth aspect of the embodiments of the present application provides a signal processing method, for implementing a wireless charging process, that is, during a process of charging a wireless power transmitting end to a wireless power receiving end, if a transmitting coil module located in the transmitting end and a receiving coil module located in the receiving end are not aligned correctly, and a magnetic field between the transmitting coil module and the receiving coil module is shifted accordingly, so that a magnetic field between the two coil modules is not distributed uniformly, which is prone to cause problems of low charging efficiency and heat generation, and to avoid an influence caused by the misalignment, misalignment information between the transmitting coil module and the receiving coil module can be detected, and after the misalignment information is obtained, the signal processing method is used to optimize a process of presenting the misalignment information to a user, wherein the signal processing method is applied to a processor included in a wireless power transmitting device, this wireless power transmitting device includes the transmitting coil module, includes: the processor acquires initial deviation information between the transmitting coil module and the receiving coil module; then, the processor determines a first association relationship between the initial offset information and the orientation of the first device of the wireless power transmitting device, and obtains a second association relationship between the orientation of the first device of the wireless power transmitting device and the direction of the geomagnetism; thereafter, the processor receives a third association transmitted by the radio energy receiving apparatus, the third association including an association of the orientation of the second device of the radio energy receiving apparatus with the direction of the geomagnetism; further, the processor determines a fourth association relationship between the initial deviation information and the orientation of the second device of the radio energy receiving apparatus according to the first association relationship, the second association relationship and the third association relationship. Thus, after determining the fourth association relationship of the orientation of the second device of the wireless power transmitting device, the processor included in the wireless power transmitting device may assist the display by using the LED lamp, or may display the second device by voice prompt or other location information; or the position can be automatically adjusted by moving devices (such as electric motors) and the like.

In a possible implementation manner of the sixth aspect of the embodiment of the present application, the method further includes: the processor sends the fourth association to the wireless energy receiving device.

In this embodiment, after obtaining the fourth association relationship, the wireless power receiving device may prompt the user with location information through a UI (e.g., a screen, an LED lamp, etc.), so that the user may remove the deviation state or reduce the deviation distance to a certain range by moving the wireless power transmitting device and/or the wireless power receiving device, so as to improve the power and/or efficiency of wireless charging.

A seventh aspect of the embodiments of the present application provides a signal processing method, for implementing a wireless charging process, that is, in a process of charging a wireless power transmitting end to a wireless power receiving end, if a transmitting coil module located in the transmitting end and a receiving coil module located in the receiving end are misaligned, a magnetic field between the transmitting coil module and the receiving coil module is correspondingly offset, so that a magnetic field between the two coil modules is unevenly distributed, which is prone to cause problems of low charging efficiency and heat generation, to avoid an influence caused by the misalignment, the misalignment information between the transmitting coil module and the receiving coil module can be detected, and after obtaining the misalignment information, the signal processing method is used to optimize a process of presenting the misalignment information to a user, wherein the signal processing method is applied to a processor, the processor is included in a wireless power receiving apparatus, the wireless power receiving apparatus includes a receiving coil module including: the processor receives a first association relation and a second association relation sent by a wireless power transmitting device, the wireless power transmitting device comprises a transmitting coil module, the first association relation comprises an association relation between initial offset information between the transmitting coil module and the receiving coil module and a first equipment orientation of the wireless power transmitting device, the second association relation comprises an association relation between the first equipment orientation of the wireless power transmitting device and a geomagnetic direction, and then the processor obtains a third association relation between a second equipment orientation of the wireless power receiving device and the geomagnetic direction; thereafter, the processor determines a fourth association of the initial offset information and the orientation of the second device of the radio energy receiving apparatus according to the first association, the second association and the third association. After determining the fourth association relationship between the initial offset information and the orientation of the second device of the wireless power receiving device, the wireless power receiving device may prompt the user with location information through a UI (e.g., a screen, an LED lamp, etc.), so that the user may remove the offset state or reduce the offset distance within a certain range by moving the wireless power transmitting device and/or the wireless power receiving device, thereby improving the power and/or efficiency of wireless charging.

An eighth aspect of the embodiments of the present application provides a wireless power transmitting apparatus, including: a processor, a memory; wherein, the memorizer is used for storing programs; the processor is configured to execute the program to implement the method according to any one of the above-mentioned fourth aspect or any one of the above-mentioned possible implementation manners of the fourth aspect, or execute the program to implement the method according to any one of the above-mentioned fifth aspect or any one of the above-mentioned possible implementation manners of the fifth aspect, or execute the program to implement the method according to any one of the above-mentioned sixth aspect or any one of the above-mentioned possible implementation manners of the sixth aspect.

For technical effects brought by the eighth aspect or any one of the possible implementations, reference may be made to different possible implementations of the fourth aspect or the fourth aspect, different possible implementations of the fifth aspect or the fifth aspect, and different possible implementations of the sixth aspect or the sixth aspect, and further description is omitted here.

A ninth aspect of the present application provides a wireless power transmitting apparatus, including: a processor, a memory; wherein, the memorizer is used for storing programs; the processor is configured to execute the program to implement the method according to any one of the fourth aspect or the fourth possible implementation manner, or execute the program to implement the method according to any one of the seventh aspect or the seventh possible implementation manner.

For technical effects brought by the ninth aspect or any one of the possible implementations, reference may be made to different possible implementations of the fourth aspect or the fourth aspect, and different possible implementations of the seventh aspect or the seventh aspect, and further description is omitted here.

A tenth aspect of the embodiments of the present application provides a computer-readable storage medium storing one or more computer-executable instructions, which, when executed by a processor, cause the processor to perform the method according to any one of the possible implementations of the fourth aspect or the fourth aspect, or cause the processor to perform the method according to any one of the possible implementations of the fifth aspect or the fifth aspect, cause the processor to perform the method according to any one of the possible implementations of the sixth aspect or the sixth aspect, and cause the processor to perform the method according to any one of the possible implementations of the seventh aspect or the seventh aspect.

An eleventh aspect of the embodiments of the present application provides a computer program product storing one or more computer executable instructions, which, when executed by a processor, cause the processor to perform the method according to any one of the fifth aspect or cause the processor to perform the method according to any one of the fifth aspect or the fifth aspect, cause the processor to perform the method according to any one of the sixth aspect or the sixth aspect, and cause the processor to perform the method according to any one of the seventh aspect or the seventh aspect.

A twelfth aspect of the present embodiment provides a chip system, where the chip system includes a processor, configured to support a controller to implement a function described in any one of the above-mentioned fourth aspect or fourth possible implementation manners, or to support a controller to implement a function described in any one of the above-mentioned fifth aspect or fifth possible implementation manners, or to support a controller to implement a function described in any one of the above-mentioned sixth aspect or sixth possible implementation manners, or to support a controller to implement a function described in any one of the above-mentioned seventh aspect or seventh possible implementation manners. In one possible design, the system-on-chip may also include a memory, storage, for storing necessary program instructions and data. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

For technical effects brought by the tenth, eleventh, and twelfth aspects or any one of the possible implementations, reference may be made to technical effects brought by different possible implementations of the fourth aspect or the fourth aspect, different possible implementations of the fifth aspect or the fifth aspect, different possible implementations of the sixth aspect or the sixth aspect, and different possible implementations of the seventh aspect or the seventh aspect, and no further description is given here.

Drawings

Fig. 1 is a schematic view of an application scenario of a detection apparatus in an embodiment of the present application;

FIG. 2(a) is another schematic diagram of an application scenario of a detection apparatus in an embodiment of the present application;

FIG. 2(b) is another schematic diagram of an application scenario of a detection apparatus in the embodiment of the present application;

FIG. 2(c) is another schematic diagram of an application scenario of a detection apparatus in the embodiment of the present application;

FIG. 2(d) is another schematic diagram of an application scenario of a detection apparatus in the embodiment of the present application;

FIG. 3 is a schematic diagram illustrating an implementation principle of a detection device in an embodiment of the present application;

FIG. 4 is a schematic view of a detecting device according to an embodiment of the present application;

FIG. 5 is another schematic view of a detection device according to an embodiment of the present application;

FIG. 6(a) is another schematic view of a detecting device in the embodiment of the present application;

FIG. 6(b) is a schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 7(a) is another schematic view of a detecting device in the embodiment of the present application;

FIG. 7(b) is another schematic diagram of a detection waveform of a detection device in the embodiment of the present application;

FIG. 8(a) is another schematic view of a detecting device in the embodiment of the present application;

FIG. 8(b) is another schematic diagram of a detection waveform of a detection device in the embodiment of the present application;

FIG. 9(a) is another schematic view of a detecting device in the embodiment of the present application;

FIG. 9(b) is another schematic diagram of a detection waveform of a detection device in the embodiment of the present application;

FIG. 10 is another schematic view of a detection device in an embodiment of the present application;

FIG. 11 is another schematic view of a detection device in an embodiment of the present application;

FIG. 12 is another schematic view of a detection device in an embodiment of the present application;

FIG. 13 is another schematic view of a detection device in an embodiment of the present application;

FIG. 14 is another schematic view of a detection device in an embodiment of the present application;

FIG. 15 is another schematic view of a detection device in an embodiment of the present application;

FIG. 16 is another schematic view of a detection device in an embodiment of the present application;

FIG. 17 is another schematic diagram of an application scenario of a detection apparatus in an embodiment of the present application;

FIG. 18 is another schematic view of a detection device in an embodiment of the present application;

FIG. 19(a) is another schematic view of a detecting unit in the embodiment of the present application;

FIG. 19(b) is another schematic view of a detecting unit in the embodiment of the present application;

FIG. 20(a) is another schematic view of a detecting unit in the embodiment of the present application;

FIG. 20(b) is another schematic view of a detecting device in the embodiment of the present application;

FIG. 21 is another schematic diagram illustrating an application scenario of a detecting device according to an embodiment of the present application;

FIG. 22 is another schematic diagram illustrating an application scenario of a detecting device according to an embodiment of the present application;

FIG. 23(a) is another schematic view of a detecting device in an embodiment of the present application;

FIG. 23(b) is a schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 24(a) is another schematic view of a detecting unit according to an embodiment of the present application;

FIG. 24(b) is another schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 25(a) is another schematic view of a detecting unit in the embodiment of the present application;

FIG. 25(b) is another schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 26(a) is another schematic view of a detecting unit in the embodiment of the present application;

FIG. 26(b) is another schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 27(a) is another schematic view of a detecting unit according to an embodiment of the present application;

FIG. 27(b) is another schematic diagram of a waveform detected by a detecting device in the embodiment of the present application;

FIG. 28 is another schematic view of a detection device in an embodiment of the present application;

FIG. 29 is a schematic view of a detection method in an embodiment of the present application;

FIG. 30 is another schematic view of a detection device in an embodiment of the present application;

FIG. 31 is another schematic view of a detection device in an embodiment of the present application;

FIG. 32 is another schematic view of a test device in an embodiment of the present application;

FIG. 33 is another schematic view of a detection device in an embodiment of the present application;

FIG. 34 is another schematic view of a test device in an embodiment of the present application;

FIG. 35 is another schematic view of a detection device in an embodiment of the present application;

FIG. 36 is another schematic illustration of a detection method in an embodiment of the present application;

FIG. 37 is another schematic illustration of a detection method in an embodiment of the present application;

FIG. 38 is another schematic illustration of a detection method in an embodiment of the present application;

FIG. 39 is another schematic diagram of a detection method in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.

Illustratively, fig. 1 illustrates a wireless charging system including a wireless power transmitting device 110 and a wireless power receiving device 120. The wireless power transmitting apparatus 110 may include: a Direct Current (DC) power supply 111, a direct current/Alternating Current (AC) conversion module 112, a matching circuit 113, a transmitting coil 114, and a control unit 115; the wireless power receiving device 120 may include: a receiving coil 124, a matching circuit 123, an AC/DC conversion module 122, a control unit 125, and a load 121. The DC/AC conversion module 112 is configured to convert the DC power provided by the DC power supply 111 into AC power, and the AC power is transmitted to the transmitting coil 114 through the matching circuit 113, so as to generate a high-frequency alternating magnetic field on the transmitting coil 114. The receiving coil 124 induces an alternating magnetic field and converts the magnetic energy into alternating current power, the alternating current power is transmitted to the AC/DC conversion module 122 through the matching circuit 123, and the AC/DC conversion module 122 converts the received alternating current power into direct current power to supply power to the load 121. The control unit 115 detects and controls an operation state of the wireless power transmitting apparatus 110, the control unit 125 detects and controls an operation state of the wireless power receiving apparatus 120, and further, the control unit 115 of the wireless power transmitting apparatus 110 and the control unit 125 of the wireless power receiving apparatus 120 may perform data interaction through in-band communication and/or out-of-band communication. The in-band communication may refer to loading data into the alternating magnetic field for transmission, such as Frequency Shift Keying (FSK), Amplitude Shift Keying (ASK); the out-of-band communication may be through bluetooth, wireless fidelity (WIFI), or other transmission methods, which are not limited herein.

Fig. 2(a) is a schematic stacked view (side view) of a coil in the wireless charging of the wireless charging system shown in fig. 1. Fig. 2(a) includes a wireless power transmitting device 210 and a wireless power receiving device 220.

Illustratively, as shown in fig. 2(a), the wireless power transmitting apparatus 210 includes a transmitting coil module (a transmitting coil 211 and a magnetic material 212). When the wireless power transmitting device 210 wirelessly charges the wireless power receiving device 220, the transmitting coil 211 is located on an inner side surface of a housing of the wireless power transmitting device 210 and is disposed close to one side of the wireless power receiving device 220, and the magnetic material 212 is disposed on the other side of the transmitting coil 211 away from the wireless power receiving device 220. The wireless power receiving device 220 includes a receiving coil module (a receiving coil 221 and a magnetic material 222). The receiving coil 221 is located on an inner side surface of the housing of the wireless power receiving device 220 and is disposed close to one side of the wireless power transmitting device 210, and the magnetic material 222 is disposed on the other side of the receiving coil 221 away from the wireless power transmitting device 210. That is, the transmitting coil 211 and the receiving coil 221 are both located between the magnetic core material 212 and the magnetic core material 222.

For example, the transmitting coil 211 and the receiving coil 221 may be planar coils, generally wound by single or multi-strand wires, or may be conductive patterns printed on a Flexible Printed Circuit (FPC) or a Printed Circuit Board (PCB), which are generally circular or rectangular. The magnetic materials 212 and 222 may be high permeability materials, such as ferrite and nanocrystal, which are sized to cover the area of the coil, so as to shield the magnetic field from interfering with other circuits in the electronic device or avoid the magnetic field from generating eddy currents on the metal to cause heat generation, i.e., the magnetic material 212 and the transmitting coil 211 may be integrally attached or separately and independently disposed. Similarly, the magnetic material 222 and the receiving coil 221 may be integrally attached to each other or separately provided. Generally, in the wireless power transmitting apparatus 210 and the wireless power receiving apparatus 220, the positions of the magnetic materials 212 and 222 and the transmitting coil 211/receiving coil 221 are relatively fixed and kept unchanged. The wireless power transmitter 210 and the wireless power receiver 220 are aligned with the centers of the two coils as coordinates, and the distance between the transmitter coil 211 in the transmitter coil module and the receiver coil 221 in the receiver coil module is usually within 8mm, and the horizontal offset is within 12mm, so that wireless charging can still be performed.

In the wireless charging process, when a certain central axis of each of the transmitting coil 211 in the transmitting coil module and the receiving coil 221 in the receiving coil module is coincident, the magnetic field between the two coils is uniformly distributed by the certain central axis, and at the moment, the two coils do not have deviation, namely the two coils are opposite; when a certain central axis of each of the transmitting coil 211 in the transmitting coil module and the receiving coil 221 in the receiving coil module is not coincident, the magnetic field between the two coils is unevenly distributed by the certain central axis, and at the moment, the two coils are off-position, namely the two coils are not over against each other; when the transmitting coil 211 in the transmitting coil module and the receiving coil 221 in the receiving coil module are offset, the coupling coefficient between the transmitting coil 211 and the receiving coil 221 is reduced, so that the charging efficiency is reduced, heat is generated, and the wireless charging performance and the user experience are affected.

In the following, the case where there is an offset (not facing) and no offset (facing) between the transmitting coil and the receiving coil will be described, as shown in fig. 2(a), the central axis Z of the transmitting coil 211 in the transmitting coil module coincides with the central axis Z 'of the receiving coil 221 in the receiving coil module, and the magnetic field between the two coils is symmetrically distributed about the central axis Z Z', and at this time, there is no offset between the transmitting coil 211 and the receiving coil 221. As shown in fig. 2(b), the central axis Z of the transmitting coil 211 in the transmitting coil module does not coincide with the central axis Z' of the receiving coil 221 in the receiving coil module, and the magnetic field between the two coils is shifted and becomes asymmetric, and at this time, there is a deviation between the transmitting coil 211 and the receiving coil 221, that is, there is a deviation when the central axis of the transmitting coil is parallel to the central axis of the receiving coil. It should be noted that, in the case where the transmitting coil 211 and the receiving coil 221 are offset, in addition to the case where the central axes of the two coils are parallel as shown in fig. 2(a) and fig. 2(b), the case may also be as shown in fig. 2(c) and fig. 2(d), as shown in fig. 2(c), the central axis Z of the transmitting coil 211 in the transmitting coil module coincides with the central axis Z 'of the receiving coil 221 in the receiving coil module, and the magnetic field between the two coils is symmetrically distributed about the central axis Z Z', and at this time, there is no offset between the transmitting coil 211 and the receiving coil 221; as shown in fig. 2(d), the central axis Z of the transmitting coil 211 in the transmitting coil module is not coincident with the central axis Z' of the receiving coil 221 in the receiving coil module, and the magnetic field between the two coils is shifted and becomes asymmetric, at this time, there is a deviation between the transmitting coil 211 and the receiving coil 221, that is, there is a deviation when the central axis of the transmitting coil intersects with the central axis of the receiving coil.

Therefore, the embodiment of the application provides a detection device, which comprises a position detection device, wherein the position detection device can detect the position information between a transmitting coil module and a receiving coil module, so that a user can know the position information and adjust the position of a wireless charging transmitting device and/or a wireless charging receiving device, and therefore the deviation state is eliminated or the deviation distance is reduced, and the purposes of improving the wireless charging performance and user experience are achieved; or after the position information is known, the wireless charging transmitting device and/or the wireless charging receiving device automatically adjust the position through a mobile device (such as an electric motor) and the like according to the position information, so that the deviation state is eliminated or the deviation distance is reduced, and the purposes of improving the wireless charging performance and the user experience are achieved.

As will be explained below with respect to the implementation principle in the embodiment of the present application, a change in magnetic flux passing through one coil will generate an induced voltage according to faraday's law of electromagnetic induction.

In equation (1), v (t) represents the induced voltage, N represents the number of turns of the coil, Φ represents the magnetic flux that a single turn of the coil passes through, B represents the magnetic flux density, and S represents the area, where the magnetic flux Φ is equal to the magnetic flux density B multiplied by the area S.

As shown in fig. 3, in one alternating magnetic field, there are two coils C1 and C2, and the coil C1 and the coil C2 are connected in series in opposite winding directions. When the rate of change of the magnetic flux passing through coils C1 and C2 multiplied by the number of turns of the respective coils is equal, the induced voltages generated at coils C1 and C2 are equal in magnitude and opposite in direction, so that the sum v (t) of the induced voltage value at coil C1 and the induced voltage value at coil C2 is 0. When the rate of change of the magnetic flux passing through the coils C1 and C2 multiplied by the number of turns of the respective coils is not equal, the induced voltages generated at the coils C1 and C2 are not equal in magnitude and opposite in direction, so that the sum v (t) of the induced voltage value of the coil C1 and the induced voltage value of the coil C2 is an alternating voltage having a certain magnitude.

By way of example, embodiments of the present application provide a position detection apparatus including at least one detection coil, a phase reference coil, and a processor according to the above principles. As shown in fig. 4 (top view), the position detecting device will be described by way of example when one detection coil is present. The detection coil 401 and the phase reference coil 402 are connected to a processor 403, and the processor 403 processes and calculates the induced voltage signal thereof and outputs position information. The position detection means may be integrated in the wireless power transmitting means, or integrated in the wireless power receiving means, or implemented separately from the wireless power transmitting means and the wireless power receiving means. The detection coil 401 and the phase reference coil 402 may be placed at any position between a transmission coil module in the wireless power transmission apparatus and a reception coil module in the wireless power reception apparatus. Obviously, when the magnetic material is present in the receiving coil module, in order to avoid the shielding effect of the magnetic material on the detecting coil 401 and the phase reference coil 402, the detecting coil 401 and the phase reference coil 402 can be placed at any position between the magnetic material in the transmitting coil module and the magnetic material in the receiving coil module. The embodiment is described by taking the example that the position detection device is integrated in the wireless power transmitting device, and the relative positions of the detection coil 401 and the phase reference coil 402 in the position detection device and the transmitting coil module 406 in the wireless power transmitting device are kept unchanged.

Illustratively, the transmitting coil module 406 and the receiving coil module 407 in the wireless energy receiving device are both circular, as shown in fig. 4, in the process of charging the receiving coil module 407 by the transmitting coil module 406, the transmitting coil module 406 may generate a first magnetic field, and the receiving coil module 407 generates an induced current through the first magnetic field to realize charging, where an area of the first magnetic field generated by the transmitting coil module 406 is a first area, the phase reference coil 402 may be at least partially (completely or partially) disposed in the first area, an area where the transmitting coil module 406 overlaps with the receiving coil module 407 is a second area, and the detection coil 401 may be at least partially disposed in the second area. In fig. 4, with the central point O of the transmitting coil module 406 as the origin, most of the forward coil 404 and the reverse coil 405 (or all of the forward coil 404 and the reverse coil 405) of the detecting coil 401 are respectively disposed on two sides of an axis passing through the origin O, wherein the forward coil 404 and the reverse coil 405 may partially overlap, and the forward coil 404 may not completely overlap with the reverse coil 405 in order to realize the subsequent detection process. This axis is exemplified as the Y-axis as shown in FIG. 4, whereinThe directional coil 404 is placed on the left side of the Y-axis and the reverse coil 405 is placed on the right side of the Y-axis. The X-axis and the Y-axis are shown as intersecting perpendicularly at the origin O. During wireless charging, the detection coil 401 generates an ac induced voltage Vd1(t) with a certain amplitude and frequency, and the phase reference coil 402 also generates an ac induced voltage vref (t) with a certain amplitude and frequency. For the sake of illustration, the induced voltages Vd1(t) and vref (t) are assumed to be sinusoidal voltages, and it is understood that the induced voltages may be an approximately sinusoidal waveform or other waveform. Here, vref (t) is set to a · sin (2 pi ft),

where a and b are voltage amplitudes, the frequency f is equal to the operating frequency of the current flowing through the transmit coil module 406,

is the phase difference between Vd1(t) and vref (t).

When the origin center of the receiving coil module 407 is moved to a position where any one point (for convenience of description, the origin center of the receiving coil module 407 is named as M point), as shown in fig. 5, a vector is formed

When the deviation of the origin center of the receiving coil module 407 with respect to the origin O of the transmitting coil module 406 is shown, the projection of the M point on the X axis is

Projection on the Y axis is

Expressed as a distance of deviation from the nominal position,

distance expressed as offset component in X-axis directionAfter the separation, the water is separated from the water,

distance expressed as an offset component in the direction of the Y axis, i.e.

Illustratively, to

To

The angle between is defined as the offset angle beta, obviously, it is also possible to define

To

The angle therebetween is defined as the offset angle β, and may be further based on

And

the other positional relationship is defined as the offset angle β, which is not limited herein, and only used in this embodiment and the following embodiments

To

The angle therebetween is defined as an offset angle β, and the entire regions in the forward coil 404 and the backward coil 405 are each placed on both sides of the Y axis, respectively, for example.

1) As shown in fig. 6(a), the magnetic field density of the alternating magnetic field between the receiving coil module 407 and the transmitting coil module 406 is distributed symmetrically with respect to the Y-axis, i.e., the first magnetic field is uniformly distributed in the Y-axis direction in the second region. Wherein justThe product of the number of turns of the coil 404 multiplied by the magnetic flux passing through it is equal to or close to the product of the number of turns of the reverse coil 405 multiplied by the magnetic flux passing through it, and therefore the sum of the induced voltage value of the forward coil 404 and the induced voltage value of the reverse coil 405, that is, the induced voltage Vd1(t) generated by the detection coil 401 is 0 or the voltage amplitude b of Vd1(t)₁Less than or equal to a first preset threshold epsilon. The first preset threshold epsilon is expressed as the voltage amplitude b of the Vd1(t) signal₁When the value is less than or equal to the first preset threshold value epsilon, the value is processed by the processor 403 to be Vd1(t) equal to 0, where the first preset threshold value epsilon may be a fixed value or may be adaptively adjusted and changed according to different modes such as the operating voltage and/or the transmission power of the wireless charging. It is noted that the phase reference coil 402 generates an induced voltage vref (t) ═ a₁Sin (2 π ft), where a₁Is the voltage magnitude, therefore, the phase difference between Vd1(t) and Vref (t)

There is no induced voltage Vd1(t) and Vref (t) in this case, as shown in FIG. 6(b), in which case the receiving coil module 407 is opposite to the transmitting coil module 406, i.e. there is no offset between the receiving coil module 407 and the transmitting coil module 406,

beta is not present.

2) As shown in fig. 7(a), taking β as 0 °, the magnetic field density of the alternating magnetic field between the receiving coil module 407 and the transmitting coil module 406 is still distributed symmetrically about the Y axis, that is, the first magnetic field is uniformly distributed in the Y axis direction in the second region. Wherein the product of the number of turns of the forward coil 404 multiplied by the magnetic flux passing through it is equal to or close to the product of the number of turns of the reverse coil 405 multiplied by the magnetic flux passing through it, and therefore the sum of the induced voltage value of the forward coil 404 and the induced voltage value of the reverse coil 405, that is, the induced voltage Vd1(t) generated by the detection coil 401 is 0, or the voltage amplitude b of Vd1(t)₂Is less than or equal to the first preset threshold epsilon. The phase reference coil 402 generates a senseApplied voltage Vref (t) ═ a₂Sin (2 π ft), where a₂Is the voltage magnitude, therefore, the phase difference between Vd1(t) and Vref (t)

Absent, the induced voltages Vd1(t) and vref (t) can be referred to as shown in fig. 7(b), in this case, the receiving coil module 407 and the transmitting coil module 406 are not offset along the Y-axis,

β∈{0°,180°}。

3) as shown in fig. 8(a), at this time, the magnetic field density of the alternating magnetic field between the receiving coil module 407 and the transmitting coil module 406 is no longer distributed symmetrically about the Y-axis, and the offset distance in the X-axis direction

The larger the difference of the magnetic field density of the distribution of the alternating magnetic field on both sides of the Y axis is, i.e. the first magnetic field is unevenly distributed in the Y axis direction in the second region. Therefore, the product of the magnetic flux passing through the forward coil 404 multiplied by the number of turns thereof is no longer equal to or close to the product of the magnetic flux passing through the reverse coil 405 multiplied by the number of turns thereof, and at this time, the sum of the induced voltage value of the forward coil 404 and the induced voltage value of the reverse coil 405, that is, the induced voltage Vd1(t) generated by the detection coil 401 is no longer equal to 0. Here, we assume that the phase reference line 402 is wound in the same direction as the backward coil 405 and the phase reference coil is wound in the opposite direction to the forward coil 404, and at this time, Vd1(t) is exactly in the same phase as vref (t), that is, Φ is equal to 0 °. Vd1(t) ═ b₃Sin (2 π ft), where b₃The voltage amplitude is larger than a first preset threshold value epsilon and the voltage amplitude b₃Will follow the offset distance

Is increased and becomes larger; at the same time, the phase reference coil 402 generates an induced voltage Vref (t) ═ a₃·sin(2πft)，a₃Is the voltage amplitude. It is to be understood that the phases described herein are identical and are not intended to be identicalPhase difference of flavor

Is completely equal to 0 DEG, phase difference

Within a first predetermined angle around 0 °, the two induced voltages will be treated by the processor 403 as if they were all together

The first preset angle may be a fixed value or may be adaptively adjusted and changed according to different modes, such as a working voltage and/or a transmission power of wireless charging, and at this time, the induced voltages Vd1(t) and vref (t) may refer to fig. 8(b), in this case, the receiving coil module 407 and the transmitting coil module 406 are offset and offset to the right side of the Y axis by a certain distance, that is, the receiving coil module 407 and the transmitting coil module 406 are offset to the right side of the Y axis

Here, β is taken as 90 °.

4) As shown in fig. 9(a), at this time, the magnetic field density of the alternating magnetic field between the receiving coil module 407 and the transmitting coil module 406 is no longer distributed symmetrically about the Y-axis, and the offset distance in the X-axis direction

The larger the difference of the magnetic field density of the distribution of the alternating magnetic field on both sides of the Y axis is, i.e. the first magnetic field is unevenly distributed in the Y axis direction in the second region. Therefore, the product of the magnetic flux passing through the forward coil 404 multiplied by the number of turns thereof is no longer equal to or close to the product of the magnetic flux passing through the reverse coil 405 multiplied by the number of turns thereof, and at this time, the sum of the induced voltage value of the forward coil 404 and the induced voltage value of the reverse coil 405, that is, the induced voltage Vd1(t) generated by the detection coil 401 is no longer equal to 0. Vd1(t) is now in phase opposition to Vref (t),

vd1(t) ═ b₄Sin (2 π ft +180 ℃ C.), whereinb₄The voltage amplitude is larger than a first preset threshold value, the voltage amplitude b₄Will follow the offset distance

Is increased and becomes larger; at the same time, the phase reference coil 402 generates an induced voltage Vref (t) ═ a₄·sin(2πft)，a₄Is the voltage amplitude. It is to be understood that the opposite phase as described herein does not mean a phase difference

Is completely equal to 180 DEG, out of phase

Within a first predetermined angle around 180 °, the two induced voltages will be treated by the processor 403 as if they were all together

At this time, the induced voltages Vd1(t) and vref (t) can be referred to as shown in fig. 9(b), in this case, the receiving coil module 407 and the transmitting coil module 406 are offset to the left side of the Y axis by a certain distance, i.e. the left side of the Y axis

β ∈ (180 °,360 °), where β ═ 270 ° is taken as an example.

As described above, when the center of the origin of the receiving coil module 407 is shifted to

Its offset component in the Y-axis direction

The magnetic field density distribution at two sides of the Y axis is still symmetrical; with offset component only in the direction of the X-axis

Causes the magnetic field density distribution on both sides of the Y-axis to become asymmetric, and

the larger the difference in magnetic field density between both sides of the Y axis, the larger the voltage amplitude b of the detection coil induced voltage Vd1 (t). Fig. 10 illustrates the variation trend of the voltage amplitude b in several deviation directions:

1) the receiving coil module 407 moves in the direction of the Y-axis, i.e.

β ∈ {0 °,180 ° }. Therefore, the detection coil 401 senses that the voltage amplitude b of the voltage Vd1(t) is 0 or b<A first preset threshold epsilon.

2) The receive coil module 407 moves in a direction other than the X-axis and the Y-axis, i.e.

β ∈ (0 °,90 °) ∈ (90 °,180 °) ∈ (180 °,270 °) ∈ (u) (270 °,360 °). Therefore, the voltage amplitude b of the induction voltage Vd1(t) of the detection coil 401 follows

Increased by an increase, moving the same

At a distance of (a) from the base,

the larger the voltage amplitude b.

3) The receiving coil module 407 moves in the direction of the X-axis, i.e.

β ∈ {90 °,270 ° }. Obviously, moving the same

At a distance of (a) from the base,

maximum, and therefore the voltage amplitude b is maximum.

As can be seen from the above, the voltage amplitude b can roughly represent the offset distance in the X-axis direction

If a certain offset angle β is preset, the offset distance can be estimated approximately according to the voltage amplitude b of the induced voltage Vd1(t) of the detection coil 401

It should be noted that the voltage amplitude b is related to the offset distance

Or

The relative relationship of (a) is a positive correlation, but is not necessarily a linear proportional relationship, and the relative relationship may be influenced by factors such as the shapes, distances, operating voltages and transmission powers of the transmitting coil module, the receiving coil module and the detecting coil, and is not limited specifically here. In the specific implementation process of the scheme, amplitude-distance relation data can be obtained through experiments, a fitting curve can be obtained through the data, and then the deviation distance of the distance value can be obtained on the curve through the amplitude b

Further, the processor 403 may execute the processing procedure in this embodiment through various implementations such as a hardware module, a software module, and the like, for example, as shown in fig. 11, at least one phase detection unit 408 and a signal processing unit 409 are disposed in the processor 403, where the phase detection unit 408 may detect phase signals of the induced voltages Vd1(t) and vref (t), and the signal processing unit 409 may calculate a phase difference between Vd1(t) and vref (t) according to the phase signals

Then according to the phase difference

And judging the deviation angle beta of the receiving coil module.

Optionally, the processor 403 may further include an amplitude detection unit 410: the amplitude detection unit 410 may be configured to detect a voltage amplitude a of the sensing voltage vref (t), so as to assist in determining a voltage and/or a transmission power of the current wireless charging system; the amplitude detection unit 410 may further be configured to detect a voltage amplitude b of the induced voltage Vd1(t) for estimating the offset distance.

In summary, the detection coil 401 may be formed by a pair of forward coil 404 and reverse coil 405 connected in series in opposite winding directions, most of the area of each of the forward coil 404 and reverse coil 405 (or all of the forward coil 404 and reverse coil 405) is placed on each side of an axis passing through the origin O, and when the receiving coil module 407 and the transmitting coil module 406 are in a facing position or are moved in the direction of the axis, the product obtained by multiplying the number of turns of the forward coil 404 by the magnetic flux passing through the forward coil 404 of the detection coil 401 is equal to or close to the product obtained by multiplying the number of turns of the reverse coil 405 by the magnetic flux passing through the reverse coil 405. At this time, the sum of the induced voltage value of the forward coil 404 and the induced voltage value of the reverse coil 405, that is, the induced voltage generated by the detection coil 401 is equal to zero, or the voltage amplitude of the induced voltage is equal to or less than a first preset threshold. The first preset threshold value indicates that the induced voltage amplitude generated by the detection coil is equal to or less than the threshold value, and is treated by the processor 403 as the induced voltage being equal to zero, that is, the first magnetic field is uniformly distributed in the Y-axis direction in the second region. It is understood that the number of turns, the area, and the shape of the forward coil 404 and the reverse coil 405 may be the same or different, and are not limited herein, but the above requirements are satisfied. The number of turns, the area and the shape of the phase reference coil are not limited, and the requirement of inducting an alternating magnetic field can be met. The forward coil, the reverse coil and the phase reference coil may be wound from single or multiple strands of wire, or from printed conductive patterns on an FPC or PCB.

In summary, when the receiving coil module 407 is located at different positions, the relationship between the induced voltages Vd1(t) and vref (t) obtained after being processed by the processor 403 and the output position information are summarized as shown in table 1 below. When only one detection coil is arranged in the position detection device, the deviation angle beta and the deviation distance cannot be accurately judged in the embodiment

And cannot determine whether it is in the facing position or the position deviated along the Y-axis.

TABLE 1

As can be seen from table 1, when there is only one detection coil in the position detection device, since the off-set angle and the off-set distance cannot be accurately determined, and it cannot be determined whether the position is in the facing position or the position moved in the axial direction in which the detection coil is located. Therefore, the wireless power receiving device and the wireless power transmitting device can be applied to the application scene of position detection when the wireless power receiving device moves relative to the wireless power transmitting device only in a direction different from the axis of the detection coil. In the practical application scenario shown in fig. 12, the mobile phone 520 (i.e. the wireless charging receiving apparatus, including the magnetic material 521 and the receiving coil module 522) moves only in the horizontal direction (X axis) relative to the upright wireless charging base 510 (i.e. the wireless power transmitting apparatus, including the magnetic material 511 and the receiving coil module 512, and the phase reference coil 513 and the detecting coil 514 in the position detecting apparatus). The position detection device shown in the embodiment of the application is located in the vertical wireless charging base 510, and the detection coils 514 are distributed on two sides of the Y axis, so that the deviation direction of the mobile phone in the horizontal direction can be detected, and the deviation distance can be further detected. After the vertical wireless charging base 510 obtains the position information, including the offset angle and the available offset distance, the following operations may be performed:

1) the vertical wireless charging base 510 can prompt the User with the position information through a User Interface (UI) (such as a screen, an LED lamp, a buzzer) so that the User can remove the offset state or reduce the offset distance to a certain range by moving the vertical wireless charging base and/or the mobile phone;

2) a moving device (e.g., an electric motor) is disposed in the vertical wireless charging base 510, and the magnetic material 511, the transmitting coil module 512, the phase reference coil 513 and the detecting coil 514 can be moved by the moving device to eliminate the offset state or reduce the offset distance to a certain range;

3) the vertical wireless charging base 510 transmits the position information to the mobile phone through in-band communication and/or out-of-band communication, and then the mobile phone prompts the position information to the user through a UI (e.g., a screen, an LED lamp);

the above is only an exemplary operation, and other possible operations are not listed here.

For a scenario that the wireless power receiving device moves in multiple directions, the embodiment of the present application may be implemented by providing two or more detection coils in the position detection device. Obviously, if the axes of the two or more detection coils are overlapped, the deviation in one direction of the overlapped line can still be detected, so that the axes of at least two of the detection coils can be set to be not overlapped and not parallel to each other, and the detection in at least two directions can be realized.

Illustratively, fig. 13 provides a position detecting device having two detection coils. The position detection device includes at least a detection coil 1301, a detection coil 1302, a phase reference coil 1303, and a processor 1304. The detection coil 1301, the detection coil 1302 and the phase reference coil 1303 are connected to a processor 1304. In the wireless charging process, the detection coil 1301 generates an induced voltage Vd1(t), the detection coil 1302 generates an induced voltage Vd2(t), the phase reference coil 1303 generates an induced voltage vref (t), and the processor 1304 processes the three induced voltage signals to calculate position information. In the present embodiment, the position detection device is integrated in the wireless power transmission device as an example, and the relative positions of the detection coil 1301, the detection coil 1302 and the phase reference coil 1303 in the position detection device and the transmission coil module 1306 in the wireless power transmission device are kept unchanged.

Illustratively, the transmitting coil module 1306 and the receiving coil module 1307 in the wireless power receiving device are both circular. With the central point O of the transmitting coil module 1306 as the origin of coordinates, the forward coil and the reverse coil of the detection coil 1301 are respectively placed on both sides of the axis X, the forward coil and the reverse coil of the detection coil 1302 are respectively placed on both sides of the axis Y, and the axis X and the axis Y are perpendicularly intersected at the origin O. The detection coil 1301, the detection coil 1302, and the phase reference coil 1303 have the features described in the above embodiments, and are not described herein again. In addition, a first connecting line of the forward coil and the backward coil in the detection coil 1301 and a second connecting line of the forward coil and the backward coil in the detection coil 1302 are not overlapped and are not arranged in parallel, wherein an included angle existing between the first connecting line and the second connecting line is n, wherein n is larger than 0 degrees and n is smaller than 180 degrees.

Similarly, the processor 1304 may execute the processing procedure in this embodiment through various implementation manners such as a hardware module, a software module, and the like, for example, at least one phase detection unit 1308 and a signal processing unit 1309 are disposed in the processor 1304, where the phase detection unit 1308 may detect phase signals of the induced voltages Vd1(t), Vd2(t), and vref (t), and the signal processing unit 1309 may calculate the phase difference between Vd1(t) and vref (t) according to the phase signals

Phase difference of Vd2(t) and Vref (t)

Then according to the phase difference

And

and judging the deviation angle beta of the receiving coil module. Vref (t) is defined as a · sin (2 pi ft),

a. b and c represent the voltage amplitudes of the respective induced voltages.

Here, we assume first:

1) when the receiving coil module 1307 is shifted upwards along the Y-axis, that is, the first magnetic field is uniformly distributed in the Y-axis direction in the second region,

β is 0 °, and the induced voltage Vd1(t) of the detection coil 1301 has the same phase as the induced voltage vref (t) of the phase reference coil 1303, that is, the phase is the same

At this time, the induced voltage Vd2(t) of the detection coil 1302 becomes 0;

2) when the receiving coil module 1307 is shifted to the right along the X-axis, i.e. the first magnetic field is not distributed uniformly in the Y-axis direction in the second region,

β is 90 °, the induced voltage Vd2(t) of the detection coil 1302 is in the same phase as the induced voltage vref (t) of the phase reference coil 1303, that is, the phase is the same

At this time, the induced voltage Vd1(t) of the detection coil 1301 becomes 0.

As shown in fig. 14, when the receiving coil module 1307 is at different positions, the phase signals of the induced voltages Vd1(t), Vd2(t) and vref (t) after being processed by the processor 1304 are summarized as shown in table 2 below. Processor 504 may be based on the phase signal

And

calculate oneA coarse offset angle beta. It should be noted that, when the receiving coil module is aligned, the offset angle β may output any angle other than [0 °,360 °, and the angle is agreed to be expressed as the aligned position.

TABLE 2

Further, as shown in fig. 15, the processor 1304 may further include a phase detection unit 1308, a magnitude detection unit 1310, and a signal processing unit 1309, where the phase detection unit 1308 may detect phase signals of the induced voltages Vd1(t), Vd2(t), and vref (t), and the signal processing unit 1309 may calculate a phase difference between Vd1(t) and vref (t) according to the phase signals

Phase difference of Vd2(t) and Vref (t)

Then according to the phase difference

And

and calculating the rough deviation direction of the receiving coil module. The amplitude detection unit 1310 is configured to: detecting the voltage amplitude a of the induction voltage Vref (t) so as to assist in judging the working voltage and/or transmission power of the current wireless charging system; detecting the voltage amplitude b of the induced voltage Vd1(t) to estimate the offset distance in the Y-axis direction

Detecting the voltage amplitude c of the induced voltage Vd2(t) for estimating the X-axis directionUpper offset distance

Thus, the processor 1304 can calculate the offset distance of the receiving coil module

At the same time, the exact deviation angle β can be calculated, and is summarized in table 3.

TABLE 3

Illustratively, fig. 16 illustrates a horizontal wireless charging base 1600 (wireless charging transmitter), which is integrated with the position detection device having two detection coils as described above, and is provided with an LED lamp in each of the upper, lower, left, and right directions. When the mobile phone 1610 (wireless charging receiving device) is placed at different positions on the horizontal wireless charging base 1600, the LED lamps can determine their operating states according to the position information obtained from the position detecting device, as shown in table 4 below. Therefore, the position information can be prompted to the user through the LED lamp display, so that the user can eliminate the deviation state or reduce the deviation distance to a certain range through moving the horizontal wireless charging base and/or the mobile phone.

Mobile phone position	LED1	LED2	LED3	LED4
					Is aligned with	OFF	OFF	OFF	OFF
Upward bias	ON	OFF	OFF	OFF
					Right upper deviation	ON	ON	OFF	OFF
Right deviation	OFF	ON	OFF	OFF
					Lower right deviation	OFF	ON	ON	OFF
Downward deviation	OFF	OFF	ON	OFF
					Left lower deviation	OFF	OFF	ON	ON
Left side deviation	OFF	OFF	OFF	ON
					Upper left deviation	ON	OFF	OFF	ON

TABLE 4

It can be understood that the number and the operating state of the LED lamps disposed on the horizontal wireless charging base 1600 can be variously described, and will not be further described herein.

For example, a moving device (e.g., an electric motor) may be disposed in the horizontal wireless charging base 1600, and according to the position information obtained from the position detecting device, the magnetic material (not shown), the transmitting coil module 1606, the phase reference coil 1603, the detecting coil 1601, and the detecting coil 1602 may be moved by the moving device at the same time to eliminate the offset state or reduce the offset distance to a certain range.

In the embodiment of the present application, after the wireless power transmitting apparatus and/or the wireless power receiving apparatus obtains the deviation information, the deviation information may be presented to the user in various manners, regardless of the position detecting apparatus shown in fig. 4 to 16 or other types of detecting apparatuses, the deviation information can only indicate the deviation information between the transmitting coil module located in the wireless power transmitting apparatus and the receiving coil module located in the wireless power receiving apparatus, and the transmitting coil module (or the receiving coil module) is located in the inner space of the wireless power transmitting apparatus (or the wireless power receiving apparatus), and the user often cannot know the deviation information between the wireless power transmitting apparatus and the wireless power receiving apparatus through the deviation information between the transmitting coil module and the receiving coil module. This problem will be solved by the description of another embodiment provided in the examples of the present application. It should be noted that the position detecting device related to the following embodiments includes, but is not limited to, the position detecting device in fig. 4 to 16 described above in this application.

The position detection device is integrated in a wireless electric energy transmitting device;

as shown in fig. 17, in order to implement the scenario that the detecting device for position information is located in the wireless power transmitting device, the embodiment is used to supplement the description on how to prompt the position condition of the user through the wireless power transmitting device according to the position signal of the wireless power transmitting device relative to the wireless power transmitting device.

The wireless power transmitting device may display the location information itself, for example, in a manner of using an LED lamp to assist in displaying as shown in fig. 16, or in a manner of displaying through voice prompt or other location information; or the position is automatically adjusted by moving devices (such as electric motors) and the like; in addition, the wireless power transmitting apparatus may also transmit the position information to the wireless power receiving apparatus through in-band communication and/or out-of-band communication, and then the wireless power receiving apparatus prompts the position information to the user through a UI (e.g., a screen, an LED lamp). However, in this case, since the wireless power transmitting apparatus and the wireless power receiving apparatus are placed in a plurality of postures, the wireless power receiving apparatus can only determine the relationship between the wireless power transmitting apparatus and the position information based on the position information acquired from the wireless power transmitting apparatus, and cannot directly acquire the relationship between the position information of the wireless power receiving apparatus itself and the position information, and for this reason, the problem will be solved by specific embodiments later.

As shown in fig. 18, the wireless power transmitting device 1810 and the wireless power receiving device 1820 form a wireless charging system withoutAn electronic compass (not shown) is disposed inside each of the linear electric energy emitter 1810 and the wireless electric energy receiver 1820, wherein the axis 1801 is the orientation of the north and south poles of the earth's magnetic field. The wireless power transmitter 1810 is provided with a transmitting coil module 1811, the geometric center of the transmitting coil module 1811 is set as the origin of coordinates O, and rays are set

As the orientation of the wireless power transmitting device 1810. The processor of the wireless power transmitting device 1810 can obtain the orientation of the three-dimensional coordinate data of the earth magnetic field, namely the magnetic north pole, by detecting the three-dimensional coordinate data of the earth magnetic field through the electronic compass

To the ray

And an azimuth angle alpha. The wireless power receiving device 1820 is provided with a receiving coil module 1821, the geometric center of the receiving coil module 1821 is set as a coordinate origin O', and a ray is set

As an orientation of the wireless power receiving device 1820. The processor of the wireless power receiving device 1820 can obtain the orientation of the three-dimensional coordinate data of the earth's magnetic field, namely the magnetic north pole, by detecting the three-dimensional coordinate data through the electronic compass

To the ray

An azimuth angle γ of; here, the wireless power transmitting device 1810, the transmitting coil module 1811, the wireless power receiving device 1820, and the receiving coil module 1822 are not limited to the shapes shown in fig. 18, and α ∈ [0 °,360 °), γ ∈ [0 °,360 °), and in this embodiment and the following embodiments, for example, in addition to the relationship between the above orientation angles, the relationship between the directions may be described by a vector relationship, and the relationship between the directions may also be described by a vector relationshipThe relationship is not limited herein. In addition, the initial offset information may indicate an offset angle, an offset distance, and/or other offset information between the transmitting coil module and the receiving coil module, and the initial offset information may be obtained through the foregoing embodiments of the present application, or may be obtained in other manners, which is not limited herein.

When the receiving coil module 1821 of the wireless power receiving device 1820 is in a deviation state with respect to the transmitting coil module 1811 of the wireless power transmitting device 1810, the origin O is not coincident with the origin O', and the orientation of the wireless power transmitting device can be detected by the position detecting device in the wireless power transmitting device 1810

To the offset direction

Has an offset angle β with respect to it, and possibly also detects an offset distance Δ (i.e. a position detection device)

Length), where β ∈ [0 °,360 °) is defined. When the transmitting coil module and the receiving coil module are aligned, β can be defined as any value i other than [0 °,360 °, i e ∈ (— ∞,0 °) [ [360 °, + ∞ ]), and is agreed to represent the value i as a positive position.

Therefore, as can be seen from the above description, when the transmitting coil module in the wireless power transmitting device 1810 and the receiving coil module in the wireless power receiving device 1820 are in the offset state, the processor in the wireless power transmitting device 1810 can calculate the radiation directed by the wireless power receiving device

Offset direction to receiving coil module in wireless power receiving device 1820

To an azimuth angle theta betweenThe wireless power receiving device 1820 may determine its own position information according to the azimuth angle θ.

θ ═ α + β - γ + n · 360 °, θ ∈ [0 °,360 °), n ∈ { -1,0,1+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

For example, in the operation of the wireless charging system, the wireless power receiving device may obtain the location information from the wireless power transmitting device in at least two ways:

1) the wireless power transmitting device 1810 transmits the detected orientation azimuth α, the offset angle β, and the possible obtained offset distance Δ to the wireless power receiving device by in-band communication and/or out-of-band communication, and the wireless power receiving device 1820 calculates θ according to formula (2) in combination with the detected orientation azimuth γ. When the radio energy receiving device reads β ═ i, or the offset distance Δ is smaller than the first distance threshold (e.g., 5mm or another value), θ is set to any one of j, j ∈ (— ∞,0 °) ∞ [360 °, + ∞), and at this time, the radio energy receiving device determines that the radio energy receiving device is in the facing position or the offset position is in the acceptable state.

2) The wireless power receiving device 1820 transmits the detected orientation azimuth angle γ to the wireless power transmitting device 1810 through in-band communication and/or out-of-band communication, the wireless power transmitting device 1810 calculates θ according to formula (2) by combining the detected orientation azimuth angle α and the deviation angle β, and then the wireless power transmitting device 1810 transmits θ and the deviation distance Δ which may be obtained to the wireless power receiving device 1820 through in-band communication and/or out-of-band communication. When the wireless power transmitting device 1810 reads β ═ i or the offset distance Δ is smaller than a first distance threshold (e.g., 5mm or another value), θ is set to j, and then when the wireless power receiving device 1820 reads θ ═ j, the wireless power receiving device 1820 determines that the aligned position or the offset position is in an acceptable state.

Illustratively, as shown in fig. 18, α of the wireless power transmitting device 1810 facing magnetic north is 333 °, γ of the wireless power receiving device 1820 facing magnetic north is 48 °, the internal position detection module of the wireless power transmitting device 1810 detects that the offset angle β of the receiving coil module is 135 °, and the offset distance Δ is 8 mm. The radio energy receiving device 1820 obtains θ equal to 333 ° +135 ° -48 ° -1 · 360 ° -60 °, and the offset distance Δ equal to 8mm, by means of in-band communication or out-of-band communication.

The wireless power receiving device 1820 prompts the user of the position information through a UI (e.g., a screen, an LED lamp, etc.) according to the obtained θ angle and the possible obtained offset distance Δ, so that the user may remove the offset state or reduce the offset distance to a certain range (e.g., 5mm, and usually the efficiency of the offset range of 0-5 mm is reduced less) by moving the wireless power transmitting device and/or the wireless power receiving device, so as to improve the power and/or efficiency of the wireless charging.

In the following, an example of how the UI interface on the screen of the wireless power receiving device (e.g. a mobile phone) displays the position information is described by taking the offset state shown in fig. 18 as an example, two UI display methods of the wireless power receiving device will be described with reference to the following drawings:

1) when the wireless charging system operates, the UI interface of the wireless electric energy receiving device displays the deviation direction or the deviation distance of the wireless electric energy receiving device through graphics and/or numbers. To illustrate with reference to fig. 19(a), the large circle 1930 indicates a chargeable range of the wireless charging or a relative position where the transmitting coil module is located, and the small circle 1940 indicates a relative position where the receiving coil module of the wireless power receiving apparatus is located. The line from the center O 'of the big circle 1930 to the center O' of the small circle 1940

The indication is the deviation direction, and the angle BO' O ″, the length

Illustratively, the offset distance Δ, θ and/or Δ values may also be displayed on the UI interface. When the user moves the wireless power transmitting apparatus and/or the wireless power receiving apparatus, the small circle 1940 updates the position shown on the UI interface accordingly according to the changes of α, β, γ, Δ. Such as a user orienting the wireless power receiving device toward

When moving in the opposite direction, the small circle 1940 on the UI will move towards the center O' of the large circle 1930. As shown in fig. 19(b), when the wireless power receiving device moves to a position where the transmitting coil module and the receiving coil module are aligned (the wireless power receiving device reads θ ═ j) or the offset distance Δ is smaller than the first distance threshold (e.g. 5mm), the center O' of the large circle 1930 and the center O ″ of the small circle 1940 are displayed on the UI interface as being overlapped, so as to indicate that the wireless power receiving device of the user is in the aligned position or the offset position is in an acceptable state.

2) When the wireless charging system operates, the UI interface of the screen on the wireless power receiving device can display the direction or distance of the user moving the wireless power receiving device through graphics and/or numbers. To illustrate as shown in fig. 20(a), a large circle 2030 indicates a chargeable range of wireless charging or a relative position of a transmitting coil module, an arrow 2040 indicates a direction or and a distance required for a user to move a wireless power receiving device,

indicated as the direction of movement required, and angle CO' B is θ, the length of the arrow is indicated as the distance Δ of movement required, and the values of θ and/or Δ may also be displayed on the UI interface. When the user moves the wireless power transmitting device and/or the wireless power receiving device, the arrow 2040 will update the direction and length of the arrow shown in the UI interface accordingly according to the change of α, β, γ, Δ. Such as a user orienting the wireless power receiving device toward

When moving in the direction of (c), the length of arrow 2040 on the UI interface will decrease accordingly. As shown in fig. 20(b), when the wireless power receiving device moves to a position where the transmitting coil module and the receiving coil module are directly opposite (θ j is read by the wireless power receiving device) or the offset distance Δ is smaller than a first distance threshold (e.g. 5mm), the arrow on the UI interface disappears to indicate that the wireless power receiving device is in the directly opposite position or the offset position is in an acceptable state.

In practical applications, a mobile terminal is usually used as a wireless power receiving device, and the terminal equipment pursues lightness, thinness, delicacy and tight internal space. Therefore, the position detection device is arranged on the wireless power transmitting device, and the internal space of the terminal equipment is saved. The position information is displayed through the UI interface of the terminal equipment, so that a user can conveniently check the position state, and the user experience can be enhanced.

Secondly, when the position detection device is integrated in the wireless energy receiving device;

as shown in fig. 21, in order to implement the scenario that the detecting device for position information is located in the wireless power transmitting device, the embodiment is used to supplement the description on how to prompt the position condition of the user through the wireless power transmitting device according to the position signal of the wireless power transmitting device relative to the wireless power transmitting device.

Specifically, as shown in fig. 18, when the transmitting coil module and the receiving coil module are in the offset state, the wireless power receiving device can obtain an azimuth angle θ between the offset direction of the wireless power receiving device 1820 and the ray directed by the wireless power receiving device through the detecting device, so that the wireless power receiving device 1820 can prompt the user of the location state according to θ. The mathematical relationship is as follows: θ { - α + β - γ + n × 360 °, where θ ∈ [0 °,360 °), and n { -1,0,1 }.

The wireless power receiving device prompts the position state to the user through a UI (user interface) of a screen or an LED (light emitting diode) lamp or other means according to the obtained angle theta and the possible obtained distance delta. The position state of the wireless power receiving device is judged by a user conveniently and is moved to the position or within a certain distance range (for example, the difference of the efficiency is small in the range of 0-5 mm through deviation) so as to improve the power and/or the efficiency of wireless charging.

In this embodiment, as for the wireless power receiving apparatus, the obtained position information can be displayed, taking the deviation state shown in fig. 18 as an example, the wireless power receiving apparatus can directly obtain the deviation angle and the deviation distance according to the detection device and display the deviation angle and the deviation distance in a similar manner as in fig. 19(a), 19(b), 20(a) and 20 (b).

In the embodiment of the present application, in the wireless charging process, as shown in fig. 22, when there is no metal or nonmetal dielectric foreign object except air between the transmitting coil module 2211 and the receiving coil module 2221, the magnetic field between the two coil modules is generally distributed symmetrically about the central axis ZZ', and if there is a metal or nonmetal dielectric foreign object 2230 except air between the transmitting coil module 2211 and the receiving coil module 2221, because the foreign object 2230 is also induced by an induced electromotive force in the time-varying magnetic field, the electromotive force generates a closed loop current, i.e., an eddy current, and the eddy current can generate a magnetic field, and the direction of the magnetic field generated by the eddy current is opposite to the original time-varying magnetic field, which is called an eddy back magnetic field. Therefore, the existence of the foreign object 2230 may cause distortion of the magnetic field between the transmitting coil module 2211 and the receiving coil module 2221, which may result in no longer symmetric distribution and reduced coupling coefficient, thereby causing problems such as reduced charging efficiency and coil heating, which may affect wireless charging performance and user experience; the foreign object 2230 eddy current effect also raises its own temperature and creates a safety hazard of igniting nearby combustibles.

Referring to the position detection device in the embodiments of fig. 4 to 20 and the eddy current effect principle of the foreign object in the magnetic field in the embodiments, the magnetic field is no longer symmetrically distributed due to the deviation between the transmitting coil module and the receiving coil module or due to the foreign object existing between the two coil modules, in order to solve the misjudgment of the deviation detection caused by the foreign object, the foreign object detection function can be realized by the technical paths such as the impedance variation comparison method and the sensor detection method in the embodiments of fig. 4 to 20, but the technical paths have obvious disadvantages, such as large environmental influence, low detection accuracy, and only being capable of detecting a large metal foreign object.

Therefore, the embodiment of the present application provides another detecting device, which includes a foreign object detecting device with a simple structure, and the foreign object detecting device can detect the foreign object information between the transmitting coil module and the receiving coil module while achieving the deviation detecting function in the embodiments of fig. 4 to 20, and the foreign object detecting device can also detect the foreign object information between the transmitting coil module and the receiving coil module on the basis of the position detecting device in the embodiments of fig. 4 to 20, so that the user can know the foreign object information and remove the foreign object, or the wireless charging transmitting device and/or the wireless charging receiving device can automatically remove the foreign object through the electric motor, the push rod and other devices, so as to achieve the purposes of improving the wireless charging performance and user experience and eliminating the potential safety hazard of inflammable objects nearby.

By way of example, embodiments of the present application provide a detection apparatus including a foreign object detection apparatus including at least one detection coil, a phase reference coil, an excitation source, and a processor according to the above-described principles. As shown in fig. 23(a) (plan view), the foreign matter detection device will be described by way of example when one detection coil is present. The detection coil 2301 and the phase reference coil 2302 are connected to a processor 2303, the excitation coil 2308 is connected to an excitation source 2309, and the processor 2303 processes and calculates induced voltage signals thereof to output deviation and foreign matter information. The deviation and foreign object detection means may be integrated in the wireless power transmitting means, or integrated in the wireless power receiving means, or implemented independently of the wireless power transmitting means and the wireless power receiving means. The present embodiment is described by taking as an example that the displacement and foreign object detection apparatus is integrated in a wireless power transmission apparatus, and the relative positions of the detection coil 2301, the phase reference coil 2302, and the excitation coil 2308 in the displacement and foreign object detection apparatus and the transmission coil module 2306 in the wireless power transmission apparatus are kept unchanged.

The foreign matter detection device can generate a second magnetic field between a magnetic material in the wireless power transmitting device and a magnetic material in the wireless power receiving device, and can be applied before the transmitting coil module charges the receiving coil module, and at the moment, a second frequency generated by the second magnetic field can be set to be the same as or different from a first frequency of a first magnetic field generated by the transmitting coil module; or, the method may be applied to the transmitting coil module to charge the receiving coil module, and the operating frequency of the current flowing through the transmitting coil module 2306 is set as a first frequency, and the operating frequency of the excitation source connected to the excitation coil is set as a second frequency, at this time, the second frequency is different from the first frequency, so that the processor can filter out signals of the two frequencies through a preset band-pass filter, for example, the first frequency is set as 125kHz, and the second frequency is set as 1 MHz. The region of the second magnetic field generated by the excitation coil is a third region, and the phase reference coil is at least partially (wholly or partially) located in the third region, and at this time, the detection coil is still located in the second region where the transmission coil module and the reception coil module are overlapped.

Illustratively, the transmit coil module 2306 and the receive coil module 2307 in the radio energy receiving device are both circular. With the center point O of the transmission coil module 2306 as the origin, most regions of each of the forward coil 2304 and the reverse coil 2305 (or all regions of each of the forward coil 2304 and the reverse coil 2305) of the detection coil 2301 are placed on both sides of an axis passing through the origin O. As illustrated in fig. 23(a) with the Y axis, the forward coil 2304 is placed on the left side of the Y axis, and the reverse coil 2305 is placed on the right side of the Y axis. The X-axis and the Y-axis are shown as intersecting perpendicularly at the origin O. During the wireless charging process, the detection coil 2301 will generate an alternating current induced voltage Vd1(t) with a certain amplitude and frequency under the action of the magnetic field generated by the transmission coil module 2306 and the excitation coil 2308, and the phase reference coil 2302 will also generate an alternating current induced voltage vref (t) with a certain amplitude and frequency at the transmission coil module 2306 and the excitation coil 2308. For the sake of illustration, the induced voltages Vd1(t) and vref (t) are assumed to be an alternating voltage obtained by superimposing two sine waves with different frequencies, and it is understood that the induced voltages may be a function waveform with other shapes.

Here, Vref (t) ═ Vref _ lf (t) + Vref _ hf (t) ═ a · sin (2 pi ft) + Asin (2 pi f't), Vd1(t) ═ Vd1_ lf (t) + Vd1_ hf (t) ═ B · sin (2 pi ft + phi) + B · sin (2 pi f't + xi); wherein the frequency f is equal to a first frequency of current flowing through the transmit coil assembly 2306 and the frequency f' is equal to a second frequency of the excitation coil 2308; vref _ lf (t) and Vd1_ lf (t) are induced voltages at the first frequency of the phase reference coil 2302 and the detection coil 2301, respectively, and Vref _ hf (t) and Vd1_ hf (t) are induced voltages at the second frequency of the phase reference coil 2302 and the detection coil 2301, respectively; a and B are the induced voltage amplitude of the phase reference coil 2302 and the detection coil 2301 at a first frequency, a and B are the induced voltage amplitude of the phase reference coil 2302 and the detection coil 2301 at a second frequency, phi is the phase difference of the first frequency between Vd1_ lf (t) and Vref _ lf (t), and xi is the phase difference of the second frequency between Vd1_ hf (t) and Vref _ hf (t).

The processor 2303 may filter out voltage signals of the induced voltages Vd1(t) and vref (t) at two frequencies, for example, as shown in fig. 23(a) and 23(b), the detection coil 2301 is connected to two band-pass filters (i.e., filtering units) inside the processor 2303, and induced voltage waveforms generated by the detection coil 2301 in the transmission coil module 2306 and the excitation coil 2308 are function waveforms Vd1(t) formed by overlapping a sine wave voltage signal at a first frequency and a sine wave voltage signal at a second frequency. The band-pass filter 2 has a low gating frequency and outputs an induction voltage Vd1_ LF (t) of the detection coil 2301 at a first frequency; the band-pass filter 1 outputs the induced voltage Vd1_ hf (t) of the sense coil 2301 at the second frequency when the gate frequency is high. In addition, the number of the band pass filters in the detection device may be 0 group, 1 group, 2 groups, or more, in this embodiment and the following embodiments, the number is not limited, for example, when the number of the band pass filters is 0 group, the distinguishing detection of the first frequency and the second frequency can be realized by respectively controlling only one group of the transmitting coil module and the exciting coil to be energized; when the number of the band-pass filters is 1 group, only one group of the transmitting coil module and the exciting coil is electrified and the transmitting coil module and the exciting coil are electrified simultaneously, so that the distinguishing detection of the first frequency and the second frequency can be realized; when the number of the band-pass filters is 2, the first frequency and the second frequency can be distinguished and detected by controlling the transmitting coil module and the exciting coil to be electrified simultaneously.

The determination of the deviation information according to the induced voltages Vref _ lf (t) of the phase reference coil 2302 and the detection coil 2301 at the first frequency and Vd1_ lf (t) is specifically described in the first embodiment, and will not be described herein. The following specifically analyzes the case where the foreign object information is determined based on the induced voltages Vref _ hf (t) and Vd1_ hf (t) at the second frequency of the phase reference coil 2302 and the detection coil 2301.

1) When there is no foreign object between the receiving coil module 2307 and the transmitting coil module 2306, as shown in fig. 24(a), the magnetic field density of the alternating magnetic field between the receiving coil module 2307 and the transmitting coil module 2306 is symmetrically distributed along the Y-axis, i.e., the second magnetic field is uniformly distributed along the Y-axis in the second region. Wherein the number of turns of the forward coil 2304 multiplied by the magnetic flux passing through it is equal to or close to the number of turns of the reverse coil 2305 multiplied by the magnetic flux passing through it, and therefore, the sum of the value of the induced voltage generated by the forward coil 2304 and the value of the induced voltage generated by the reverse coil 2305, that is, the induced voltage Vd1_ hf (t) generated by the detection coil 2301 is 0, or the voltage amplitude B of Vd1_ hf (t)₁Less than or equal to a second preset threshold λ, which is denoted as Vd1_ hf (t), the signal is processed by the processor 2303 to be Vd1_ hf (t) equal to 0, and the second preset threshold λ may be a fixed value or may be adaptively adjusted and changed according to different modes, such as the operating voltage and/or the excitation power of the excitation source. The phase reference coil 2302 generates an induced voltage Vref _ hf (t) a₁Sin (2 π f't), in which A₁Is the voltage amplitude. The phase difference ξ between Vd1_ hf (t) and Vref _ hf (t) is not present, and the induced voltages Vd1_ hf (t) and Vref _ hf (t) can be referred to as shown in fig. 24 (b).

2) When the eddy counter magnetic field generated by the foreign object 2311 is symmetric along the Y-axis, for example, the embodiment is discussed by taking a cylindrical homogeneous foreign object as an example, and when the foreign object 2311 exists along the Y-axis, as shown in fig. 25(a), the magnetic field density of the alternating magnetic field between the receiving coil module 2307 and the transmitting coil module 2306 is still distributed symmetrically along the Y-axis, that is, the second magnetic field is distributed uniformly in the direction of the Y-axis in the second region. Wherein the number of turns of the forward coil 2304 multiplied by the magnetic flux passing through it is equal to or close to the number of turns of the reverse coil 2305 multiplied by the magnetic flux passing through it, and therefore, the sum of the value of the induced voltage generated by the forward coil 2304 and the value of the induced voltage generated by the reverse coil 2305, that is, the induced voltage Vd1_ hf (t) generated by the detection coil 2301 is 0, or the voltage amplitude B of Vd1_ hf (t)₂Is less than or equal to a second preset threshold lambda. The phase reference coil 202 generates an induced voltage Vref _ hf (t) a₂Sin (2 π f't), whichIn A₂Is the voltage amplitude. The phase difference ξ between Vd1_ hf (t) and Vref _ hf (t) is not present, and the induced voltages Vd1_ hf (t) and Vref _ hf (t) can be referred to fig. 25 (b).

3) When the position of the foreign object deviates to the left side of the Y axis by a certain distance, as shown in fig. 26(a), the magnetic field density of the alternating magnetic field between the receiving coil module 2307 and the transmitting coil module 2306 is no longer distributed symmetrically about the Y axis, that is, the second magnetic field is not distributed uniformly in the direction of the Y axis in the second region, and the larger the eddy back magnetic field generated by the foreign object is, the larger the difference of the magnetic field density of the alternating magnetic field distributed on both sides of the Y axis is. Therefore, the magnetic flux passing through the forward coil 2304 is no longer equal to the magnetic flux passing through the reverse coil 2305, and the detection coil 2301 generates an induced voltage Vd1_ hf (t). Here we assume Vd1_ hf (t) is exactly in phase with Vref _ hf (t), i.e., ξ ═ 0 °. Vd1_ hf (t) ═ B₃Sin (2 π f't), in which B₃A voltage amplitude value B is larger than a second preset threshold value lambda₃The induced voltages Vd1_ hf (t) and Vref _ hf (t) become larger as the eddy current back-magnetic field generated by the foreign object increases, as shown in fig. 26 (b). At the same time, the phase reference coil 2302 generates an induced voltage Vref _ hf (t) a₃·sin(2πf′t)，A₃Is the voltage amplitude. It is to be understood that the same phase as described herein does not mean that the phase difference ξ is exactly equal to 0 °, and that the two induced voltages will be treated by the processor 2303 as though ξ ═ 0 ° ξ when the phase difference ξ is within the first preset angle around 0 °. The first preset angle may be a fixed value or may be adaptively adjusted and changed according to different modes, such as the operating voltage and/or the excitation power of the excitation source.

4) When the receiving coil module 2307 and the transmitting coil module 2306 are biased to the right side of the Y axis by a certain distance, as shown in fig. 27(a), the magnetic field density of the alternating magnetic field between the receiving coil module 2307 and the transmitting coil module 2306 is no longer symmetrically distributed about the Y axis, that is, the second magnetic field is unevenly distributed in the direction of the Y axis in the second region, and the larger the eddy back magnetic field generated by the foreign object is, the larger the difference of the magnetic field density of the alternating magnetic field distributed on both sides of the Y axis is. Thus, the magnetic flux passing through the forward coil 2304 is no longer equal to the magnetic flux passing throughThe detecting coil 2301 generates an induced voltage Vd1_ hf (t) by the magnetic flux of the reverse coil 2305. Vd1_ hf (t) is in opposite phase with Vref _ hf (t), and ξ is 180 °, Vd1_ hf (t) is B₄Sin (2 π f't + 180), in which B₄The voltage amplitude is greater than a second preset threshold value, the voltage amplitude is B₄The induced voltages Vd1_ hf (t) and Vref _ hf (t) become larger as the eddy current back-magnetic field generated by the foreign object increases, as shown in fig. 27 (b). At the same time, the phase reference coil 2302 generates an induced voltage Vref _ hf (t) a₄·sin(2πf′t)，A₄Is the voltage amplitude. It will be appreciated that the opposite phase as described herein does not mean that the phase difference ξ is exactly equal to 180 °, and that within a first preset angle around 180 °, the two induced voltages will be treated by the processor 203 as though ξ is equal to 180 °.

Further, as shown in fig. 28, the processor 2303 may execute the processing procedure in this embodiment through various implementations such as a hardware module, a software module, and the like, for example, at least one phase detection unit 23031 and a signal processing unit 23032 are disposed in the processor 2303, wherein the phase detection unit 23031 may detect phase signals of the induced voltages Vd1_ hf (t) and Vref _ hf (t), and the signal processing unit 23032 may calculate the phase difference ξ between Vd1_ hf (t) and Vref _ hf (t) according to the phase signals.

Optionally, the processor 2303 may further include an amplitude detection unit 23033: the voltage amplitude A of the induction voltage Vref _ HF (t) can be detected to assist in judging the working voltage and/or excitation power of the current excitation source; the detection circuit can be used for detecting the voltage amplitude B of the induced voltage Vd1_ HF (t) to estimate the magnitude of the eddy back-magnetic field generated by the foreign matters.

In summary, when the foreign object is located at different positions, the relationship between the induced voltages Vd1_ hf (t) and Vref _ hf (t) obtained after being processed by the processor 2303 and the output information of the foreign object are summarized as shown in table 5 below. When there is only one detection coil in the deviation and foreign matter detecting device, the present embodiment cannot accurately determine whether there is no foreign matter or whether the foreign matter is at the position along the Y-axis.

Foreign body position information	No foreign matter	Along the Y axis	Biased to the left of the Y axis	Is deviated to the right side of the Y axis
					Phase difference xi	Is absent from	Is absent from	0°	180°
Amplitude of voltage	0	0	>0	>0

TABLE 5

In summary, the detection coil is formed by connecting a pair of forward coils and a pair of reverse coils in series in opposite winding directions, and most areas of the forward coils and the reverse coils are respectively placed on two sides of an axis passing through the origin O; when no foreign matter exists between the receiving coil module and the transmitting coil module or the position is along the axis, the number of turns of the forward coil of the detection coil is multiplied by the magnetic flux passing through the forward coil and is equal to or close to the magnetic flux, the number of turns of the reverse coil is multiplied by the magnetic flux passing through the reverse coil, the sum of the induced voltage value generated by the forward coil and the induced voltage value generated by the reverse coil is equal to zero, or the voltage amplitude of the induced voltage is smaller than or equal to a second preset threshold value, the second preset threshold value indicates that the induced voltage amplitude generated by the detection coil is smaller than or equal to the threshold value, the induced voltage is considered to be equal to zero when the voltage amplitude is processed by the processor, and the second magnetic field is uniformly distributed in the direction of a certain axis in the second area. It is understood that the number of turns, the area, and the shape of the forward coil and the reverse coil may be the same or different, and are not limited herein, but the above requirements are satisfied. The number of turns, the area and the shape of the phase reference coil are not limited, and the requirement of inducting an alternating magnetic field can be met. The forward coil, the reverse coil and the phase reference coil may be wound from single or multiple strands of wire, or from printed conductive patterns on an FPC or PCB.

From the above, when only one detection coil is provided in the deviation detecting device, it cannot be determined whether there is no foreign matter or whether the foreign matter is located along the axis of the detection coil. Therefore, a detection blind area exists, after the wireless charging base obtains the foreign matter information, the position of the foreign matter and the size of an eddy back magnetic field generated by the obtained foreign matter can be operated as follows:

1) the wireless charging base can prompt the foreign matter information to a user through a UI (such as a screen, an LED lamp and a buzzer) so as to facilitate the user to eliminate the foreign matter;

2) a foreign matter removing device (such as an electric motor and a push rod) is arranged in the wireless charging base, and the influence of foreign matters can be eliminated through the foreign matter removing device;

3) the wireless charging base transmits the foreign matter information to the mobile phone through in-band communication and/or out-of-band communication, and then the mobile phone prompts the foreign matter information to a user through a UI (user interface) (such as a screen and an LED lamp);

For example, the deviation and foreign object information is prompted to the user through the user interface, and fig. 29 is a schematic diagram illustrating the steps of the deviation and foreign object detection method:

step 2901, start;

step 2902, collecting coil voltages Vd1_ HF (t), Vref _ LF (t), and Vd1_ LF (t);

step 2903, calculating phase difference xi, phi and amplitude B, b;

step 2904, judge whether there is foreign matter through xi and B, if yes, go to step 2905, if no, go to step 2906;

step 2905, foreign matter information is output, and the UI prompts to remove foreign matters;

step 2906, judge whether there is a deviation by phi and b, if yes, go to step 2907, if no, go to step 2908;

step 2907, outputting deviation information, and removing deviation by UI prompt;

and step 2908, ending.

For a scene in which a foreign object exists at a position along the Y-axis or along the X-axis, the embodiments of the present application may be implemented by providing two or more detection coils in the deviation and foreign object detection device. The two or more detection coils are located on different axes, and a case where the misalignment and foreign matter detection device has two detection coils will be described below.

Illustratively, fig. 30 provides a deflection and foreign object detection device having two detection coils. The displacement and foreign object detection device includes at least a detection coil 3011, a detection coil 3012, a phase reference coil 302, an excitation coil 308, an excitation source 309, and a processor 303. The detection coil 3011, the detection coil 3012 and the phase reference coil 302 are connected to a processor 303. In the wireless charging process, the detection coil 3011 generates an induced voltage Vd1(t), the detection coil 3012 generates an induced voltage Vd2(t), the phase reference coil 302 generates an induced voltage vref (t), and the processor 303 processes the three induced voltage signals to calculate the offset and the foreign object information. In this embodiment, the deviation and foreign object detection apparatus is integrated into the wireless power transmitting apparatus, and the relative positions of the detection coil 3011, the detection coil 3012 and the phase reference coil 302 in the deviation and foreign object detection apparatus and the transmitting coil module 306 in the wireless power transmitting apparatus are kept unchanged.

Illustratively, the transmitting coil module 306 and the receiving coil module 307 in the radio energy receiving device are both circular. The central point O of the transmitting coil module 306 is used as the origin of coordinates, the forward coil and the reverse coil of the detecting coil 3011 are respectively placed on both sides of the axis X, the forward coil and the reverse coil of the detecting coil 3012 are respectively placed on both sides of the axis Y, and the axis X and the axis Y are perpendicularly intersected with each other at the origin O. The detection coil 3011, the detection coil 3012, and the phase reference coil 302 have the features described in the above embodiments, and are not described herein again.

The deviation information is determined according to the induced voltages Vref _ lf (t), Vd1_ lf (t), and Vd2_ lf (t) of the phase reference coil 302, the detection coil 3011, and the detection coil 3012 at the first frequency, which have been described in the above embodiments specifically, and will not be described herein again. The following specifically analyzes the case where the foreign matter information is determined based on the induced voltages Vref _ hf (t), Vd1_ hf (t), and Vd2_ hf (t) at the second frequency of the phase reference coil 302, the detection coil 3011, and the detection coil 3012.

The processor 303 may execute the processing procedure in this embodiment through various implementation manners such as a hardware module and a software module, for example, at least one phase detection unit 3031 and a signal processing unit 3032 are included in the processor 303, where the phase detection unit 3031 may detect phase signals of the induced voltages Vd1_ hf (t), Vd2_ hf (t) and Vref _ hf (t), and the signal processing unit 3032 may calculate the phase difference ξ of Vd1_ hf (t) and Vref _ hf (t) according to the phase signals₁Vd2_ HF (t) and Vref _ HF (t) phase difference ξ₂Then according to the phase difference xi₁And xi₂And determining the foreign body position.

Vref _ hf (t) ═ a · sin (2 pi f't), Vd1_ hf (t) ═ B · sin (2 pi f't + ξ) are defined herein₁)，Vd2_HF(t)＝Csin(2πf′t+ξ₂) And A, B, C, the voltage amplitude of each induced voltage.

Here, we assume first:

1) when a foreign object is present at a lower position, the induced voltage Vd1_ hf (t) of the detection coil 3011 has the same phase as the induced voltage Vref _ hf (t) of the phase reference coil 302, i.e., ξ₁＝0°,ξ₂When the induced voltage Vd2_ hf (t) of the detection coil 3011 becomes 0 °, the induced voltage Vd2_ hf (t) becomes 0;

2) when a foreign object is present at the left position, the induced voltage Vd2_ hf (t) of the detection coil 3012 has the same phase as the induced voltage Vref _ hf (t) of the phase reference coil 302, i.e., ξ₁＝0°，ξ₂At this time, the induced voltage Vd1_ hf (t) of the detection coil 3012 becomes 0 °.

Therefore, as shown in fig. 31, when the foreign object is located at different positions, the phase signals of the induced voltages Vd1_ hf (t), Vd2_ hf (t), and Vref _ hf (t) after being processed by the processor 303 are summarized as shown in table 6 below.

Position of foreign body	Phase difference xi₁	Phase difference xi₂
			Absence of foreign matter	Is absent from	Is absent from
Lower part	0°	Is absent from
			Left lower part	0°	0°
Left side of	Is absent from	0°
			Upper left of	180°	0°
On the upper part	180°	Is absent from
			Upper right part	180°	180°
Right side	Is absent from	180°
			Lower right	0°	180°

TABLE 6

Furthermore, as shown in fig. 32, the processor 303 may further include a phase detection unit 3031, a magnitude detection unit 3033, and a signal processing unit 3032, wherein the phase detection unit 3031 may detect phase signals of the induced voltages Vd1_ hf (t), Vd2_ hf (t), and Vref _ hf (t), and the signal processing unit 3032 may calculate a phase difference ξ between Vd1_ hf (t) and Vref _ hf (t) according to the phase signals₁Vd1_ HF (t) and Vref _ HF (t) phase difference ξ₂Then according to the phase difference xi₁And xi₂The position of the foreign object is calculated. The amplitude detection unit 3033 is configured to: detecting the voltage amplitude A of the induction voltage Vref _ HF (t) to assist in judging the working voltage and/or excitation power of the current excitation source; the voltage amplitude B of the detection induced voltage Vd1_ HF (t) and the voltage amplitude C of the detection induced voltage Vd2_ HF (t) are used for estimating the magnitude of the eddy back magnetic field generated by the foreign matters.

For example, fig. 33 illustrates a horizontal wireless charging base (wireless charging transmitting device) which is integrated with the deviation detecting device and the foreign object detecting device having two detecting coils as described above, and the LED lamps capable of emitting red light and blue light are respectively disposed in the upper, lower, left, and right directions. When the mobile phone 313 (wireless charging receiving device) is placed at different positions on the horizontal wireless charging base, each LED lamp may emit red light according to the deviation information obtained from the deviation and foreign object detection device to determine the deviation state thereof, as shown in table 4 of the second embodiment, which is not described herein again. When a foreign object exists at different positions on the horizontal wireless charging base, each LED lamp can emit blue light according to the foreign object information acquired from the deviation and foreign object detection device to determine the foreign object state thereof, as shown in table 7. Therefore, the foreign matter information can be prompted to the user through the LED lamp display, so that the user can know the foreign matter information and remove the foreign matter.

TABLE 7

It is understood that the number of LED lamps and the operation status of the LED lamps disposed on the horizontal wireless charging base 800 may be variously described, and will not be further described herein.

For example, foreign matter removing devices (e.g., an electric motor and a push rod) may be disposed in the horizontal wireless charging base 800, and the foreign matter removing devices may remove the influence of the foreign matter according to the foreign matter information acquired from the deviation and foreign matter detecting device.

When a foreign object exists at the position of the origin O, since the magnetic field density of the alternating magnetic field between the receiving coil module 207 and the transmitting coil module 206 is still distributed in a central symmetry manner around the origin O, as shown in fig. 34, the deviation and foreign object detection apparatus cannot determine whether the foreign object or the foreign object exists at the position of the origin O, and therefore a detection blind area still exists, the detection blind area can be obtained by reducing the voltage amplitude a of the phase reference coil placed at the position of the origin O, as shown in fig. 35, detecting the induced voltage Vref _ hf (t), and determining that a is smaller than or equal to the third preset threshold χ, so as to assist in determining whether the foreign object exists at the position of the origin O.

In the embodiment of the present application, the detecting device shown in fig. 23 to fig. 35 may be independently disposed outside the wireless power transmitting device and the wireless power receiving device, or may be integrally disposed in the wireless power transmitting device as shown in fig. 17, or may be integrally disposed in the wireless power receiving device as shown in fig. 21, which is not limited herein.

The detection device in the embodiment of the present application is described above, and the following description is made in terms of a method executed by a processor in the detection device.

Referring to fig. 36, an embodiment of a detection method provided in the embodiment of the present application is applied to a processor, the processor is included in a detection apparatus, the detection apparatus includes a detection coil and a phase reference coil, the detection coil includes a forward coil and a reverse coil that are connected to each other, and the method includes:

3601. the processor detects a first induction signal generated by the phase reference coil in a first magnetic field, wherein the phase reference coil is at least partially positioned in a first area, the detection coil is at least partially positioned in a second area, the first area is an area where the transmitting coil module generates the first magnetic field, and the second area is an area where the transmitting coil module and the receiving coil module are overlapped; when the first magnetic field is unevenly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the backward coil in the first magnetic field is greater than a first preset threshold value, and at this time, it can be determined that a deviation exists between the transmitting coil module and the receiving coil module; when the first magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the reverse coil in the first magnetic field is less than or equal to a first preset threshold value, and at this time, it can be determined that no offset exists between the transmitting coil module and the receiving coil, that is, the transmitting coil module is right opposite to the receiving coil module;

3602. the processor detects a second induction signal generated by the detection coil in the first magnetic field;

3603. the processor determines the deviation information between the transmitting coil module and the receiving coil module according to the first induction signal and the second induction signal.

As a preferred embodiment, the first sensing signal includes a first phase, the second sensing signal includes a second phase, and the processor determining the offset information between the transmitting coil module and the receiving coil module according to the first sensing signal and the second sensing signal includes:

the processor determines an offset angle between the transmitting coil module and the receiving coil module according to the first phase and the second phase.

As a preferred embodiment, the second sensing signal includes a second amplitude, and the processor determining the offset information between the transmitting coil module and the receiving coil module according to the first sensing signal and the second sensing signal includes:

the processor determines the offset distance between the transmitting coil module and the receiving coil module according to the amplitude.

As a preferred embodiment, the method further comprises:

the processor detects that the phase reference coil generates a third induction signal in a second magnetic field, the phase reference coil is at least partially located in a third area, the third area is an area where the exciting coil generates a second magnetic field, the exciting coil generates the second magnetic field between the transmitting coil module and the receiving coil module, and a second frequency of the second magnetic field is different from a first frequency of the first magnetic field; when the second magnetic field is unevenly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is greater than a second preset threshold value, and at this time, it can be determined that a foreign object exists between the transmitting coil module and the receiving coil module; when the second magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is less than or equal to a second preset threshold value, and at this time, it can be determined that no foreign matter exists between the transmitting coil module and the receiving coil module;

the processor detects that the detection coil generates a fourth induction signal in the second magnetic field;

the processor determines foreign matter information between the transmitting coil module and the receiving coil module according to the third induction signal and the fourth induction signal.

As a preferred embodiment, the third sensing signal includes a third phase, the fourth sensing signal includes a fourth phase, and the determining, by the processor, the foreign object information between the transmitting coil module and the receiving coil module according to the third sensing signal and the fourth sensing signal includes:

the processor determines the area of the foreign object between the transmitting coil module and the receiving coil module according to the third phase and the fourth phase.

As a preferred embodiment, the fourth sensing signal includes a fourth amplitude, and the determining, by the processor, the foreign object information between the transmitting coil module and the receiving coil module according to the third sensing signal and the fourth sensing signal includes:

and the processor determines the magnitude of an eddy back magnetic field generated by the foreign matter between the transmitting coil module and the receiving coil module according to the fourth amplitude.

Referring to fig. 37, another embodiment of a detection method for a processor included in a wireless power transmitting apparatus including a transmitting coil module is provided in an embodiment of the present application, including:

3701. the processor acquires initial deviation information between the transmitting coil module and the receiving coil module, and the receiving coil module is contained in the wireless energy receiving device;

3702. the processor determines a first association relationship between the initial offset information and the orientation of a first device of the wireless power transmitting apparatus;

3703. the processor acquires a second association relation between the orientation of first equipment of the wireless power transmitting device and the direction of the geomagnetic field;

3704. the processor transmits the first association and the second association to the wireless energy receiving device.

It should be noted that the initial offset information may indicate an offset angle, an offset distance, or other offset information between the transmitting coil module and the receiving coil module, and the initial offset information obtaining process may be implemented by the foregoing embodiments of the present application, or may be obtained by other manners, which is not limited herein. The first, second, third, and fourth correlations may be expressed by angular relationships between the respective positions, or by vector relationships between the respective positions, and are not limited herein.

Referring to fig. 38, another embodiment of a detection method for a processor included in a wireless power transmitting apparatus including a transmitting coil module is provided in an embodiment of the present application, including:

3801. the processor acquires initial deviation information between the transmitting coil module and the receiving coil module;

3802. the processor determines a first association relationship between the initial offset information and the orientation of a first device of the wireless power transmitting apparatus;

3803. the processor acquires a second association relation between the orientation of first equipment of the wireless power transmitting device and the direction of the geomagnetic field;

3804. the processor receives a third association relation sent by the radio energy receiving device, wherein the third association relation comprises an association relation between the orientation of the second equipment of the radio energy receiving device and the direction of the terrestrial magnetism;

3805. the processor determines a fourth association relationship between the initial deviation information and the orientation of the second device of the wireless energy receiving device according to the first association relationship, the second association relationship and the third association relationship.

As a preferred embodiment, the method further comprises:

the processor sends the fourth association to the wireless energy receiving device.

Referring to fig. 39, another embodiment of a detection method for a processor included in a wireless power receiving device including a receiving coil module is provided in an embodiment of the present application, including:

3901. the processor receives a first association relation and a second association relation sent by a wireless power transmitting device, the wireless power transmitting device comprises a transmitting coil module, the first association relation comprises an association relation between initial offset information between the transmitting coil module and the receiving coil module and a first equipment orientation of the wireless power transmitting device, and the second association relation comprises an association relation between the first equipment orientation of the wireless power transmitting device and a geomagnetic direction;

3902. the processor acquires a third correlation relation between the orientation of the second equipment of the wireless energy receiving device and the direction of the geomagnetism;

3903. the processor determines a fourth association relationship between the initial deviation information and the orientation of the second device of the wireless energy receiving device according to the first association relationship, the second association relationship and the third association relationship.

The embodiment of the present application further provides a wireless power transmitting apparatus, including: a processor, a memory; wherein, the memorizer is used for storing programs; the processor has a function of implementing the method described in fig. 36 and any corresponding possible implementation manner thereof, fig. 37 and any corresponding possible implementation manner thereof, and fig. 38 and any corresponding possible implementation manner thereof. In addition, the function may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

The embodiment of the present application further provides a wireless power receiving apparatus, including: a processor, a memory; wherein, the memorizer is used for storing programs; the processor has the function of implementing the method described in fig. 36 and any corresponding possible implementation manner thereof, and fig. 39 and any corresponding possible implementation manner thereof. In addition, the function may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

An embodiment of the present application further provides a computer-readable storage medium storing one or more computer-executable instructions, and when the computer-executable instructions are executed by a processor, the processor executes the method described in fig. 36 and any one of its corresponding possible implementations, fig. 37 and any one of its corresponding possible implementations, fig. 38 and any one of its corresponding possible implementations, and fig. 39 and any one of its corresponding possible implementations.

An embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a controller to implement the functions related to fig. 36 and any corresponding possible implementation manner thereof, or to support the controller to implement the functions related to fig. 37 and any corresponding possible implementation manner thereof, or to support the controller to implement the functions related to fig. 38 and any corresponding possible implementation manner thereof, or to support the controller to implement the functions related to fig. 39 and any corresponding possible implementation manner thereof. In one possible design, the system-on-chip may also include a memory, storage, for storing necessary program instructions and data. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processor, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A detection device, comprising:

the device comprises a processor, a detection coil and a phase reference coil;

the phase reference coil is at least partially positioned in a first area, the detection coil is at least partially positioned in a second area, the first area is an area where the transmitting coil module generates a first magnetic field, and the second area is an area where the transmitting coil module and the receiving coil module are overlapped;

the detection coil comprises a forward coil and a reverse coil which are connected with each other, and when the first magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the reverse coil in the first magnetic field is less than or equal to a first preset threshold value;

the processor is respectively connected with the phase reference coil and the detection coil and is used for detecting a first induction signal generated by the phase reference coil in the first magnetic field and a second induction signal generated by the detection coil in the first magnetic field and determining deviation information between the transmitting coil module and the receiving coil module according to the first induction signal and the second induction signal;

the deviation information comprises a deviation angle;

in the process that the transmitting coil module charges the receiving coil module, the processor is configured to obtain a first phase of the first induction signal and a second phase of the second induction signal, and determine an offset angle between the transmitting coil module and the receiving coil module according to the first phase and the second phase.

2. The apparatus of claim 1, wherein the offset information further comprises an offset distance,

in the process that the transmitting coil module charges the receiving coil module, the processor is used for acquiring a second amplitude of the second induction signal, and determining an offset distance between the transmitting coil module and the receiving coil module according to the second amplitude, wherein the offset distance and the second amplitude are in positive correlation.

3. The apparatus of any one of claims 1-2, wherein the phase reference coil is at least partially located in a third region, the third region being a region where an excitation coil generates a second magnetic field, the excitation coil generating the second magnetic field between the transmit coil module and the receive coil module, a second frequency of the second magnetic field being different from a first frequency of the first magnetic field;

when the second magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is less than or equal to a second preset threshold value;

the processor is further used for detecting a third induction signal generated by the phase reference coil in the second magnetic field and a fourth induction signal generated by the detection coil in the second magnetic field, and determining foreign matter information between the transmitting coil module and the receiving coil module according to the third induction signal and the fourth induction signal.

4. The apparatus of claim 3, wherein the foreign object information comprises a region of a foreign object, the processor is further configured to determine a third induced signal generated by the phase reference coil in the second magnetic field, and a fourth induced signal generated by the detection coil in the second magnetic field;

the processor is further configured to detect a third phase of the third sensing signal, detect a fourth phase of the fourth sensing signal, and determine an area where the foreign object is located according to the third phase and the fourth phase.

5. The apparatus according to claim 3, wherein the foreign object information includes a magnitude of an eddy current diamagnetic field generated by the foreign object, and the processor is further configured to obtain a fourth amplitude of the fourth induction signal, and determine the magnitude of the eddy current diamagnetic field generated by the foreign object according to the fourth amplitude, wherein the magnitude of the eddy current diamagnetic field generated by the foreign object is in positive correlation with the magnitude of the fourth amplitude.

6. The apparatus according to any one of claims 1 to 2, wherein the detection coil includes a first detection coil including a first forward coil and a first backward coil and a second detection coil including a second forward coil and a second backward coil;

an included angle between a first connecting line between the center of the first forward coil and the center of the first backward coil and a second connecting line between the center of the second forward coil and the center of the second backward coil is n, wherein n is greater than 0 degree and less than 180 degrees;

when the first magnetic field is uniformly distributed in the direction of the first connecting line in the second region, the sum of the induced voltage value of the first forward coil in the first magnetic field and the induced voltage value of the first backward coil in the first magnetic field is less than or equal to the first preset threshold; when the second magnetic field is uniformly distributed in the direction of the second connecting line in the second region, the sum of the induced voltage value of the second forward coil in the first magnetic field and the induced voltage value of the second backward coil in the first magnetic field is less than or equal to the first preset threshold.

7. The apparatus of claim 6, wherein the first line and the second line are perpendicular to each other.

8. The apparatus according to any one of claims 1 to 2, wherein the transmit coil module further comprises a first magnetic material, and the detection coil and the phase reference coil are located between the first magnetic material and the receive coil module.

9. The apparatus of claim 8, wherein the receive coil module comprises a second magnetic material, the detection coil and the phase reference coil being located between the first magnetic material and the second magnetic material.

10. A wireless power transmitter, comprising the detecting device of any one of claims 1 to 9, a transmitter coil module;

in the process that the transmitting coil module charges the receiving coil module, the detection device is located between the transmitting coil module and the receiving coil module, the detection device is used for determining deviation information between the transmitting coil module and the receiving coil module, and the receiving coil module is contained in a wireless energy receiving device.

11. A wireless power receiving device, comprising the detecting device according to any one of claims 1 to 9, a receiving coil module and a control unit;

in the process that the transmitting coil module charges the receiving coil module, the detection device is located between the transmitting coil module and the receiving coil module, the detection device is used for determining deviation information between the transmitting coil module and the receiving coil module, and the transmitting coil module is contained in the wireless power transmitting device.

12. A detection method applied to a processor, the processor being included in a detection device including a detection coil and a phase reference coil, the method comprising:

the processor detects a first induction signal generated by the phase reference coil in a first magnetic field, and in the process that the transmitting coil module charges the receiving coil module, the phase reference coil is at least partially located in a first area, the detecting coil is at least partially located in a second area, the first area is an area where the transmitting coil module generates the first magnetic field, and the second area is an area where the transmitting coil module and the receiving coil module are overlapped; the detection coil comprises a forward coil and a reverse coil which are connected with each other, and when the first magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the first magnetic field and the induced voltage value of the reverse coil in the first magnetic field is less than or equal to a first preset threshold value;

the processor detects a second induction signal generated by the detection coil in the first magnetic field;

the processor determines deviation information between the transmitting coil module and the receiving coil module according to the first induction signal and the second induction signal;

the first sensing signal comprises a first phase, the second sensing signal comprises a second phase, and the processor determines the offset information between the transmitting coil module and the receiving coil module according to the first sensing signal and the second sensing signal comprises:

and the processor determines the offset angle of the offset between the transmitting coil module and the receiving coil module according to the first phase and the second phase.

13. The method of claim 12, wherein the second inductive signal comprises a second amplitude, and wherein the processor determining the misalignment information between the transmit coil module and the receive coil module from the first inductive signal and the second inductive signal comprises:

and the processor determines the offset distance between the transmitting coil module and the receiving coil module according to the second amplitude.

14. The method according to any one of claims 12 to 13, further comprising:

the processor detects that the phase reference coil generates a third induction signal in a second magnetic field, the phase reference coil is at least partially located in a third area, the third area is an area where an exciting coil generates a second magnetic field, the exciting coil generates the second magnetic field between the transmitting coil module and the receiving coil module, and a second frequency of the second magnetic field is different from a first frequency of the first magnetic field; when the second magnetic field is uniformly distributed in the second area, the sum of the induced voltage value of the forward coil in the second magnetic field and the induced voltage value of the reverse coil in the second magnetic field is less than or equal to a second preset threshold value;

and the processor determines foreign matter information of the foreign matter according to the third induction signal and the fourth induction signal.

15. The method of claim 14, wherein the third sensing signal comprises a third phase and the fourth sensing signal comprises a fourth phase, and wherein the processor determining the foreign object information for the foreign object from the third sensing signal and the fourth sensing signal comprises:

and the processor determines the area of the foreign matter between the transmitting coil module and the receiving coil module according to the third phase and the fourth phase.

16. The method of claim 14, wherein the fourth sensing signal comprises a fourth amplitude, and wherein the processor determining the foreign object information for the foreign object from the third sensing signal and the fourth sensing signal comprises:

and the processor determines the size of an eddy back magnetic field generated by the foreign matter between the transmitting coil module and the receiving coil module according to the fourth amplitude.

17. A signal processing method applied to a processor, the processor being included in a wireless power transmitting apparatus, the wireless power transmitting apparatus including a transmitting coil module, comprising:

the processor is configured to obtain offset information between the transmit coil module and a receive coil module included in a wireless energy receiving device by the method according to any one of claims 12 to 16, the offset information including an offset angle;

the processor determines a first association relationship between the offset information and a first device orientation of the wireless power transmitting apparatus;

the processor acquires a second association relation between the orientation of the first equipment of the wireless electric energy transmitting device and the direction of the geomagnetic field;

the processor transmits the first association relationship and the second association relationship to the wireless power reception apparatus.

18. A signal processing method applied to a processor, the processor being included in a wireless power transmitting apparatus, the wireless power transmitting apparatus including a transmitting coil module, comprising:

the processor is configured to obtain offset information between the transmit coil module and the receive coil module by the method according to any one of claims 12 to 16, the offset information including an offset angle;

the processor receives a third association relation sent by the wireless power receiving device, wherein the third association relation comprises an association relation between the orientation of second equipment of the wireless power receiving device and the direction of the terrestrial magnetism;

and the processor determines a fourth association relationship between the deviation information and the orientation of the second device of the wireless power receiving device according to the first association relationship, the second association relationship and the third association relationship.

19. The method of claim 18, further comprising:

and the processor sends the fourth incidence relation to the wireless power receiving device.

20. A signal processing method applied to a processor, wherein the processor is included in a wireless power receiving device, the wireless power receiving device includes a receiving coil module, and the method includes:

the processor receives a first association relation and a second association relation sent by a wireless power transmitting device, the wireless power transmitting device comprises a transmitting coil module, the first association relation comprises an association relation between the deviation information between the transmitting coil module and the receiving coil module and the orientation of first equipment of the wireless power transmitting device, the second association relation comprises an association relation between the orientation of the first equipment of the wireless power transmitting device and the direction of the terrestrial magnetism, and the deviation information comprises a deviation angle;

wherein the offset information is obtained by a method according to any one of claims 12 to 16;

the processor acquires a third correlation relation between the orientation of second equipment of the wireless power receiving device and the direction of the geomagnetic field;

21. A wireless power transmitting device, comprising:

a processor, a memory;

the memory is used for storing programs;

the processor is configured to execute the program to implement the method of any one of claims 12 to 16, or execute the program to implement the method of claim 17, or execute the program to implement the method of claim 18 or 19.

22. A wireless power receiving device, comprising:

a processor, a memory;

the memory is used for storing programs;

the processor is configured to execute the program to implement the method of any one of claims 12 to 16 or to execute the program to implement the method of claim 20.

23. A computer readable storage medium for storing program instructions, which when run on a computer, cause the computer to perform the method of any one of claims 12 to 16, or cause the computer to perform the method of claim 17, or cause the computer to perform the method of claim 18 or 19, or cause the computer to perform the method of claim 20.