CN104901372A - Wireless charging foreign matter detection apparatus and method - Google Patents
Wireless charging foreign matter detection apparatus and method Download PDFInfo
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- CN104901372A CN104901372A CN201510297047.3A CN201510297047A CN104901372A CN 104901372 A CN104901372 A CN 104901372A CN 201510297047 A CN201510297047 A CN 201510297047A CN 104901372 A CN104901372 A CN 104901372A
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Abstract
The invention discloses wireless charging foreign matter detection apparatus and method. The method includes the steps that receiving, by a wireless electric power reception device, wireless electric power and performing charging; providing, by a wireless electric power emission device, wireless electric power needed by the wireless electric power reception device; detecting the gravity value of a heavy object when the heavy object is placed on the charging plane of the wireless electric power emission device; and determining whether the detected gravity value is abnormal compared with a benchmark value, wherein wireless charging is not started if the gravity value is abnormal, otherwise, wireless charging is started.
Description
Technical field
The present invention relates generally to the foreign bodies detection field of wireless charging, especially relate to a kind of foreign matter detecting method of wireless charging and the detection device for foreign matter of wireless charging.
Background technology
Wireless charging technology (Wireless charging technology; Wireless charge technology), also known as doing induction charging, non-contact inductive charging, come from wireless power conveying technology, utilize near field to respond to, namely inductance coupling high, transmitted its energy to the device of electricity consumption by power supply unit (charger), this device uses the energy received to charge to battery, and simultaneously for itself running.Owing to transmitting energy with inductance coupling high between charger and power device, connect without electric wire between the two, the device of therefore charger and electricity consumption can be accomplished to expose without conductive junction point.In wireless charging technology, there is electromagnetic induction scheme, use the resonance scheme of resonance and for converting electric energy to microwave and sending the microwave scheme of microwave.Because the wireless power receiving equipment in wireless charging and wireless power transmission equipment are non-contacting, there is a fixed gap centre, so charge than contact, when there is metallic foreign body between wireless power receiving equipment and wireless power transmission equipment, metallic foreign body has eddy current loss and produces heat, having safety issues such as catching fire, having the method by detecting voltage in electric power transfer and power to realize the function of foreign bodies detection at present.
Summary of the invention
Technical problem
Detection device for foreign matter due to the wireless charging according to above-mentioned prior art needs when detecting foreign matter first to communicate with the foundation of wireless power transmission equipment at wireless power receiving equipment, this communication needs just can set up when wireless charging starts, need to consume certain electric power and time, therefore there is utilization rate of electrical according to the detection device for foreign matter of the wireless charging of prior art low, the technical problem of the deficiency that detection efficiency is low.
Technical scheme
Therefore, the one side of the application provides the device and method of the foreign bodies detection of wireless charging, and it can improve utilization rate of electrical, improves foreign bodies detection efficiency.
In addition, the other one side of the application provides the device and method of the foreign bodies detection of wireless charging, it can before the connection setup of wireless power receiving equipment and wireless power transmission equipment, whether the gravity value detecting weight is abnormal compared with fiducial value, if so, then wireless charging is not started; If not, then wireless charging is started.In addition, the other one side of the application provides the method for the foreign bodies detection of wireless charging, and the method comprises: accept wireless power by wireless power receiving equipment and charge; The wireless power needed for described wireless power receiving equipment is provided by wireless power transmission equipment; The gravity value of described weight is detected when weight is positioned over the charging plane of described wireless power transmission equipment; And judge whether the described gravity value detected is abnormal compared with fiducial value, if so, then do not start wireless charging; If not, then wireless charging is started.
Preferably, described fiducial value is the fiducial value scope preset; If the described gravity value detected is not within the described fiducial value scope preset, be then abnormal; If the described gravity value detected is within the described fiducial value scope preset, then not abnormal.
Preferably, described fiducial value is the particular value determined when only described wireless power receiving equipment is positioned over cradle; If the described gravity value detected is not equal to described particular value, be then abnormal; If the described gravity value detected equals described particular value, then not abnormal.
Preferably, described open wireless charging comprises: start wireless charging according to qi agreement.
In addition, the other one side of the application provides the device of the foreign bodies detection of wireless charging, and this device comprises: wireless power transmission unit, by electromagnetic induction principle, to described wireless power receiving equipment transmission wireless power; Control unit, is connected to described wireless power transmission unit, for generating the control signal needed for wireless charging; And gravity detecting unit, be connected to described control unit, during for being positioned over the charging plane of described wireless power transmission equipment at weight, detect the gravity value of described weight; Described control unit, is compare based on the described gravity value and fiducial value that detect to judge whether exception, does not if so, then start wireless charging; If not, then wireless charging is started.
Preferably, this device also comprises: described fiducial value is the fiducial value scope preset; Parameter setting unit, for storing described fiducial value scope; If the described gravity value detected is not within described fiducial value scope, be then abnormal; If the described gravity value detected is within described fiducial value scope, then not abnormal.
Preferably, this device also comprises: described fiducial value is the particular value determined when only described wireless power receiving equipment is positioned over cradle; Parameter setting unit, for storing described particular value; If the described gravity value detected is not equal to described particular value, be then abnormal; If the described gravity value detected equals described particular value, then not abnormal
Preferably, described startup wireless charging comprises: start wireless charging according to qi agreement.
Preferably, returning apparatus also comprises: display unit, for showing the gravity value of described fiducial value, weight.
Technique effect
The present invention brings technique effect to be to judge whether the weight being positioned over wireless power supply equipment charging plane is wireless power receiving equipment sooner, more accurately, thus improves utilization rate of electrical, saves the electric energy of wireless power supply equipment.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.
Fig. 1 is the view that the detection device for foreign matter of wireless charging according to an embodiment of the invention and wireless power receiving equipment are positioned over wireless power transmission equipment charge plane;
Fig. 2 is the block diagram of the structure of the detection device for foreign matter of wireless charging according to an embodiment of the invention.
Fig. 3 is the block diagram of the structure of the detection device for foreign matter of wireless charging according to another example of the present invention.
Fig. 4 is the block diagram of the structure of the detection device for foreign matter of wireless charging according to another example of the present invention.
Fig. 5 is the flow chart of the foreign matter detecting method of wireless charging according to an embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Hereinafter, the detection device for foreign matter of wireless charging of the present invention will be described in more detail.Fig. 1 illustrates that the detection device for foreign matter of wireless charging according to an embodiment of the invention and wireless power receiving equipment are positioned over the view of wireless power transmission equipment.
With reference to figure 1, reference number 100 indicates wireless power receiving equipment, and the charging plane of numeral 200 instruction wireless power transmission equipment, needs wireless power receiving system 100 just can carry out wireless charging as the charging plane of wireless power transmission apparatus.
Wireless power receiving equipment 100 can be as portable electric appts such as panel computer, mobile phone, E-book readers, and wireless power transmission equipment 200 can be the equipment can launching wireless power, such as charging panel, cradle etc.The following description of the present invention is the example of charging panel and mobile phone based on wireless power transmission equipment 200 and wireless power receiving equipment 100 respectively.
Fig. 1 illustrates that the detection device for foreign matter of wireless charging according to an embodiment of the invention and wireless power receiving equipment are positioned over the view of wireless power transmission equipment charge plane.In this case, be positioned over the charging plane of charging panel 200 at mobile phone 100 after, only have to set up according to wireless charging agreement between mobile phone 100 with charging panel 200 and to communicate and after starting wireless charging, receive wireless power by mobile phone 100 and charge, providing the wireless power needed for mobile phone 100 by charging panel 200.
Foreign matter of the prior art inspection is after wireless charging starts and carries out a period of time, by judging whether exception as the parameter such as temperature, power in measurement wireless charging, and interrupts charging flow.This mode need to set up between mobile phone 100 with charging panel 200 communicate after just can carry out, there is utilization rate of electrical low, the technical problem of the deficiency that detection efficiency is low.
Therefore, according to embodiments of the invention, when weight is positioned over the charging plane of charging panel 200, detect the gravity value of weight; And judge whether the described gravity value detected is abnormal compared with fiducial value, if so, then do not start wireless charging; If not, then wireless charging is started.
Hereinafter, the structured flowchart of mobile phone 100 and charging panel 200 according to an embodiment of the invention will be described in more detail.
Fig. 2 is the block diagram of the structure of the detection device for foreign matter that wireless charging is according to an embodiment of the invention shown.
With reference to Fig. 2, the detection device for foreign matter of wireless charging can be charging panel 200.Charging panel 200 comprises wireless power transmission unit 210, control unit 220, gravity detecting unit 230, launches induction coil 211.
Mobile phone 100 can comprise wireless power receiving element 110, control unit 120, battery unit 130, induction receiving coil 111.
Charging panel 200 transmits wireless power by the electromagnetic induction between the transmitting induction coil 211 of charging panel 200 and the induction receiving coil 111 of mobile phone 100 or resonance to the battery unit 130 of mobile phone 100.
The control unit 220 of charging panel 200 is connected to described wireless power transmission unit, perform the general operation of charging panel 200, concrete, the control unit 220 of charging panel 200 can be set up with the control unit 120 of mobile phone 100 by communication protocol and communicate, generate the wireless charging control signal needed for wireless charging by the charge parameter of detection of handset 100, charged state, and send to wireless power transmission unit 210.The described control signal that wireless power transmission unit 210 reception control unit 220 generates, and perform corresponding operating.
Wireless charging control signal needed for described wireless charging comprises startup wireless charging, does not start wireless charging, stops wireless charging, stops wireless charging.
The gravity detecting unit 230 of charging panel 200 is connected to described control unit 220, during for being positioned over the charging plane of described charging panel 200 at weight, detected the gravity value of described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220.
The described control unit 220 of charging panel 200 receives described gravitational cue, compares based on the described gravity value and fiducial value that detect and judges whether exception, if so, then do not generate the control signal starting wireless charging, do not start wireless charging; If not, then generate the control signal starting wireless charging and send to described wireless power transmission unit 210, starting wireless charging.
Hereinafter, the structured flowchart of charging panel 200 according to an embodiment of the invention will be described in more detail.
Fig. 3 is the block diagram of the structure of the detection device for foreign matter of the wireless charging illustrated according to another example of the present invention.
With reference to Fig. 3, the detection device for foreign matter of wireless charging can be charging panel 200.Charging panel 200 comprises wireless power transmission unit 210, control unit 220, gravity detecting unit 230, parameter setting unit 240, launches induction coil 211.
Mobile phone 100 can comprise wireless power receiving element 110, control unit 120, battery unit 130, induction receiving coil 111.
Charging panel 200 transmits wireless power by the electromagnetic induction between the transmitting induction coil 211 of charging panel 200 and the induction receiving coil 111 of mobile phone 100 or resonance to the battery unit 130 of mobile phone 100.
The control unit 220 of charging panel 200 is connected to described wireless power transmission unit, perform the general operation of charging panel 200, concrete, the control unit 220 of charging panel 200 can be set up with the control unit 120 of mobile phone 100 by communication protocol and communicate, generate the wireless charging control signal needed for wireless charging by the charge parameter of detection of handset 100, charged state, and send to wireless power transmission unit 210.The described control signal that wireless power transmission unit 210 reception control unit 220 generates, and perform corresponding operating.
Wireless charging control signal needed for described wireless charging comprises startup wireless charging, does not start wireless charging, stops wireless charging, stops wireless charging.
The gravity detecting unit 230 of charging panel 200 is connected to described control unit 220, during for being positioned over the charging plane of described charging panel 200 at described weight, detected the gravity value of described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220.
The described control unit 220 of charging panel 200 receives described gravitational cue, compares based on the described gravity value and fiducial value that detect and judges whether exception, if so, then do not generate the control signal starting wireless charging, do not start wireless charging; If not, then generate the control signal starting wireless charging and send to described wireless power transmission unit 210, starting wireless charging.
Described fiducial value is the fiducial value scope preset, the described parameter setting unit 220 of charging panel 200 is for storing described fiducial value scope, can described fiducial value scope be obtained by the mode of artificial input number range and store, also can by detecting the weight of described mobile phone 100 in foreign situation, and based on described weight, rationally the certain amplitude of plus-minus obtains described fiducial value scope and stores.For example:
[table 1]
With reference to table 1, input numerical value 100g, 150g, it is 100g to 105g that described parameter setting unit 240 stores described fiducial value scope, when being positioned over the charging plane of described charging panel 200 when described weight, the gravity value being detected described weight by the gravity sensor of the built-in routine of gravity detecting unit 230 is 101g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 101g relatively detected and fiducial value scope 100-105g, judge that conclusion is not as abnormal, generation simultaneously starts the control signal of wireless charging and the control signal of described startup wireless charging sends to described wireless power transmission unit 210, start wireless charging.
Input numerical value 100g, 105g, it is 100 to 105g that described parameter setting unit 240 stores described fiducial value scope; When being positioned over the charging plane of described charging panel 200 when described weight, the gravity value being detected described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in is 160g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 160g relatively detected and fiducial value scope 100g-105g, judge that conclusion is as abnormal, does not generate the control signal starting wireless charging simultaneously.
Input numerical value 200g, 205g, it is 100g to 105g that described parameter setting unit 240 stores described fiducial value scope, when being positioned over the charging plane of described charging panel 200 when described weight, the gravity value being detected described weight by the gravity sensor of the built-in routine of gravity detecting unit 230 is 204g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 204g relatively detected and fiducial value scope 200-205g, judge that conclusion is not as abnormal, generation simultaneously starts the control signal of wireless charging and the control signal of described startup wireless charging sends to described wireless power transmission unit 210, start wireless charging.
Input numerical value 200g, 205g, it is 200g to 205g that described parameter setting unit 240 stores described fiducial value scope; When being positioned over the charging plane of described charging panel 200 when described weight, the gravity value being detected described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in is 206g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 206g relatively detected and fiducial value scope 200g-205g, judge that conclusion is as abnormal, does not generate the control signal starting wireless charging simultaneously.
[table 2]
Reference table 2, when when foreign, only described mobile phone 100 is positioned over the charging plane of described charging panel 200, the gravity value that described gravity detecting unit detects is 200g, and when the reasonable amplitude of fiducial value scope is 5%, described fiducial value scope is 190g-210g.
When described weight is positioned over the charging plane of described charging panel 200, the gravity value being detected described weight by the gravity sensor of the built-in routine of gravity detecting unit 230 is 196g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 196g relatively detected and fiducial value scope 190-210g, judge that conclusion is not as abnormal, generation simultaneously starts the control signal of wireless charging and the control signal of described startup wireless charging sends to described wireless power transmission unit 210, start wireless charging.
When described weight is positioned over the charging plane of described charging panel 200, the gravity value being detected described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in is 220g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 220g relatively detected and fiducial value scope 190g-210g, judge that conclusion is as abnormal, does not generate the control signal starting wireless charging simultaneously.
[table 3]
Reference table 3, when when foreign, only described mobile phone 100 is positioned over the charging plane of described charging panel 200, the gravity value that described gravity detecting unit detects is 200g, and described base particular value is 200g.
When described weight is positioned over the charging plane of described charging panel 200, the gravity value being detected described weight by the gravity sensor of the built-in routine of gravity detecting unit 230 is 200g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 200g relatively detected and particular value 200g, judge that conclusion is not as abnormal, generation simultaneously starts the control signal of wireless charging and the control signal of described startup wireless charging sends to described wireless power transmission unit 210, start wireless charging.
When described weight is positioned over the charging plane of described charging panel 200, the gravity value being detected described weight by the conventional articulated gravity transducer that gravity detecting unit 230 is built-in is 202g, described gravity value resolved to gravitational cue that applicable described control unit 220 accepts and send to described control unit 220, described control unit 220 receives described gravitational cue, the described gravity value 202g relatively detected and described particular value 200g, judge that conclusion is as abnormal, does not generate the control signal starting wireless charging simultaneously.
Hereinafter, by the structured flowchart of more detailed description charging panel 200 according to another embodiment of the present invention.
Fig. 4 is the block diagram of the structure of the detection device for foreign matter of wireless charging according to another example of the present invention.
Described charging panel 200 also comprises display unit 250, and described display unit 250 is connected to described control unit 250, and described display unit 250 is for showing the gravity value of described fiducial value, described weight.
Display unit 250 can comprise liquid crystal display, organic light emitting diode display device etc., and can under the control of control unit 220, show the gravity value of described fiducial value, described weight, when described fiducial value comprises reference range, foreign only described mobile phone 100 place when being set forth in the charging plane of described charging panel 200, detect the gravity value of described weight when the gravity value that described gravity detecting unit detects, described weight are positioned over the charging plane of described wireless power transmission equipment; Under the control of control unit 220, described control unit 220 can also be shown after comparing the described gravity value and fiducial value detected, judges whether abnormal conclusion; The time state that the state that can also show startup wireless charging under the control of control unit 220, the state not starting wireless charging, the state stopping wireless charging, the state of stopping wireless charging, wireless charging have carried out.
Hereinafter, will describe the operating process of wireless charging foreign bodies detection, Fig. 5 is the flow chart of the foreign matter detecting method of wireless charging according to an embodiment of the invention.
Wireless power receiving equipment 100 can be as portable electric appts such as panel computer, mobile phone, E-book readers, and wireless power transmission equipment 200 can be the equipment can launching wireless power, such as charging panel, cradle etc.The following description of the present invention is the example of charging panel and mobile phone based on wireless power transmission equipment 200 and wireless power receiving equipment 100 respectively.
In step 300, when weight is positioned over the charging plane of described charging panel 200, the gravity detecting unit 230 of charging panel 200 starts to detect described weight value.
In the step 310, the control unit 220 of charging panel 200 judges whether the described gravity value detected is abnormal compared with fiducial value.
If the comparative result in step 310 is abnormal, then performs step 315, do not start wireless charging;
If the comparative result in step 310 is not abnormal, then performs step 320, start wireless charging.
After starting charging, in a step 330, charging panel 200 provides the wireless power needed for described mobile phone 100, and mobile phone 100 receives wireless power and charges simultaneously.
As an example, described fiducial value is the fiducial value scope preset, the described parameter setting unit 220 of charging panel 200 is for storing described fiducial value scope, can described fiducial value scope be obtained by the mode of artificial input number range and store, also can by detecting the weight of described mobile phone 100 in foreign situation, and based on described weight, rationally the certain amplitude of plus-minus obtains described fiducial value scope and stores.If the described gravity value detected is not within the described fiducial value scope preset, be then abnormal; If the described gravity value detected is within the described fiducial value scope preset, then not abnormal.
As another example, the particular value determined when only described mobile phone 100 is positioned over cradle when described fiducial value is foreign; If the described gravity value detected is not equal to described particular value, be then abnormal; If the described gravity value detected equals described particular value, then not abnormal.
As another example, described startup wireless charging comprises: start wireless charging according to qi agreement.Described according to qi agreement start wireless charging comprise successively: choice phase, ping stage, configuration phase, charging stage four-stage.In the choice phase, the wireless power transmission unit 210 of described charging panel 200 monitors the location of described mobile phone 100 in charging plane, if and distinguish wireless power receiving element in described mobile phone 100 110 and external items coin, key, enter the ping stage after such Primary Location induction region.In the ping stage, the wireless power transmission unit 210 combine digital ping of described charging panel 200, and monitor and answer, as the answer of the wireless power receiving element 110 in mobile phone 100 as described in finding, then enter configuration phase.At configuration phase, the wireless power transmission unit 210 of described charging panel 200 obtain configuration information as peak power output, as described in the maximal received power of wireless power receiving element 110 in mobile phone 100, the wireless power transmission unit 210 of described charging panel 200 utilizes described configuration information to create host-host protocol.After host-host protocol is set up, charging panel 200 provides the wireless power needed for described mobile phone 100, and mobile phone 100 receives wireless power and charges simultaneously.
The present invention, before existing qi agreement foreign bodies detection flow process, increases the step that the gravity value that judges to be positioned over the weight of the charging plane of wireless power supply equipment is whether abnormal.Because the foreign matter detecting method of qi agreement, needing wireless power receiving element to communicate with wireless power transmission unit, is judge foreign matter in communication process.And the present invention is before communication process carries out, the gravity value of described weight is detected, by judging whether described gravity value comes to judge in advance whether described weight is wireless power receiving equipment extremely, technique effect is brought to be can be faster, judge whether the weight being positioned over wireless power supply equipment charging plane is wireless power receiving equipment more accurately, need to start charging owing to avoiding in existing foreign bodies detection side clock method simultaneously, the waste of energy of foreign bodies detection just can be carried out when setting up communication, improve utilization rate of electrical, save the electric energy of wireless power supply equipment, and then improve the efficiency of charging conversion, also corresponding wireless power receiving equipment product can be made to have more lasting flying power.
Be understandable that, according to the embodiment of the present invention, wireless power receiving equipment is for mobile phone, wireless power transmission equipment is for charging panel, and wireless power receiving equipment can be as portable electric appts such as panel computer, mobile phone, E-book readers, wireless power transmission equipment can be the equipment can launching wireless power, such as charging panel, cradle etc.The illustrative embodiments that above execution mode is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (9)
1. a foreign matter detecting method for wireless charging, the method comprises:
Accept wireless power by wireless power receiving equipment and charge;
The wireless power needed for described wireless power receiving equipment is provided by wireless power transmission equipment; The gravity value of described weight is detected when weight is positioned over the charging plane of described wireless power transmission equipment; And
Judge whether the described gravity value detected is abnormal compared with fiducial value, if so, then do not start wireless charging; If not, then wireless charging is started.
2. method according to claim 1, wherein,
Described fiducial value is the fiducial value scope preset;
If the described gravity value detected is not within the described fiducial value scope preset, be then abnormal;
If the described gravity value detected is within the described fiducial value scope preset, then not abnormal.
3. method according to claim 1, wherein,
Described fiducial value is the particular value determined when only described wireless power receiving equipment is positioned over cradle;
If the described gravity value detected is not equal to described particular value, be then abnormal;
If the described gravity value detected equals described particular value, then not abnormal.
4. method according to claim 1, wherein, described startup wireless charging comprises:
Wireless charging is started according to qi agreement.
5. a wireless charging device for foreign bodies detection, this device comprises:
Wireless power transmission unit, to described wireless power receiving equipment transmission wireless power;
Control unit, is connected to described wireless power transmission unit, for generating the control signal needed for wireless charging; And
Gravity detecting unit, is connected to described control unit, detects the gravity value of described weight when being positioned over the charging plane of described wireless power transmission equipment for weight;
Described control unit, is compare based on the described gravity value and fiducial value that detect to judge whether exception, does not if so, then start wireless charging; If not, then wireless charging is started.
6. device according to claim 5, this device also comprises:
Described fiducial value is the fiducial value scope preset;
Parameter setting unit, for storing described fiducial value scope;
If the described gravity value detected is not within described fiducial value scope, be then abnormal;
If the described gravity value detected is within described fiducial value scope, then not abnormal.
7. device according to claim 5, this device also comprises:
Described fiducial value is the particular value determined when only described wireless power receiving equipment is positioned over cradle;
Parameter setting unit, for storing described particular value;
If the described gravity value detected is not equal to described particular value, be then abnormal;
If the described gravity value detected equals described particular value, then not abnormal.
8. device according to claim 5, wherein, described startup wireless charging comprises:
Wireless charging is started according to qi agreement.
9. the device of claim 6 or 7, returning apparatus also comprises:
Display unit, for showing the gravity value of described fiducial value, described weight.
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| CN107294149B (en) * | 2016-03-31 | 2020-08-25 | 比亚迪股份有限公司 | Wireless charging system, power supply device and foreign matter monitoring method and system |
| CN110001445A (en) * | 2019-05-28 | 2019-07-12 | 北京有感科技有限责任公司 | Vehicular charging method and apparatus |
| CN110001445B (en) * | 2019-05-28 | 2024-02-09 | 北京有感科技有限责任公司 | Vehicle charging method and device |
| CN111049277A (en) * | 2019-12-29 | 2020-04-21 | 歌尔股份有限公司 | Wireless charging base and wireless charging method |
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