CN103236567B - The method of wireless charging, Apparatus and system - Google Patents

The method of wireless charging, Apparatus and system Download PDF

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Publication number
CN103236567B
CN103236567B CN201310136835.5A CN201310136835A CN103236567B CN 103236567 B CN103236567 B CN 103236567B CN 201310136835 A CN201310136835 A CN 201310136835A CN 103236567 B CN103236567 B CN 103236567B
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China
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frequency
terminal
transmitting terminal
electromagnetic wave
receiving terminal
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CN201310136835.5A
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CN103236567A (en
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王志刚
刘玉清
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东莞宇龙通信科技有限公司
宇龙计算机通信科技(深圳)有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The method, the Apparatus and system that the invention discloses a kind of wireless charging, relate to electronic apparatus application field, can solve the problem that in wireless charging process, degree of coupling reduces. Method of the present invention comprises: obtain the coupling feature information of opposite end, described coupling feature information is for characterizing the degree of coupling of receiving and dispatching electromagnetic wave signal between local terminal and opposite end; Determine local terminal frequency according to described coupling feature information, so that local terminal frequency and opposite end frequency reach optimum Match. The present invention is mainly used in carrying out in the process of wireless charging such as the electronic equipment such as mobile phone, computer.

Description

The method of wireless charging, Apparatus and system
Technical field
The present invention relates to electronic apparatus application field, relate in particular to a kind of method, Apparatus and system of wireless charging.
Background technology
Wireless charging technology mainly transmits electric energy by electromagnetic mode, and typical wireless charging system comprises a useIn send electromagnetic transmitting terminal (for example charging base) and one for example, for receiving electromagnetic receiving terminal (to be charged establishingStandby). Between transmitting terminal and receiving terminal, receive and dispatch electromagnetic wave by the mode of electromagnetic induction or magnetic resonance, thereby realize electric energyShift. Along with wireless charging technology increasingly mature with and the continuous expansion of range of application, wireless charging technology is more and more subject toTo the attention of electronic equipment set manufacturer, obtain greatly in fields such as mobile phone charging, electric automobile, medical treatment electronic equipment implantationPay close attention to.
The principle that wireless charging technology generates electromagnetic waves is, transmitting terminal inside is provided with the electricity such as such as LC loop vibrationRoad, transforms between electric field energy in the magnetic field energy in oscillating circuit internal inductance and electric capacity mutually, produces oscillating current, thereby produces toolThere is the electromagnetic wave of high frequency characteristics. Receiving terminal is by reaching optimum Match with wave frequency (also referred to as transmitting terminal tranmitting frequency)Receive frequency receives electromagnetic wave.
State in realization in the process of wireless charging, inventor finds that in prior art, at least there are the following problems: conventionally,The tranmitting frequency of transmitting terminal and the receive frequency of receiving terminal are fixed value. Along with the electronic equipment increase of service time, electronicsPart of devices in equipment is aging, and the frequency of transmitting terminal and receiving terminal can change, and causes thus degree of coupling to reduce, and thenReduce charge efficiency. In addition the reduction of degree of coupling also can cause electromagnetic radiation and caloric value to increase, and further accelerates electronics and establishesStandby device aging, affect life of product, also can cause the generation of fire incident seriously time.
Summary of the invention
The embodiment of the present invention provides a kind of method, Apparatus and system of wireless charging, can solve in wireless charging processThe problem that degree of coupling reduces.
First aspect, the embodiment of the present invention provides a kind of method of wireless charging, comprising:
Obtain the coupling feature information of opposite end, described coupling feature information is used for characterizing between local terminal and opposite end receives and dispatches electromagnetismThe degree of coupling of ripple signal;
Determine local terminal frequency according to described coupling feature information, so that local terminal frequency and opposite end frequency reach optimum Match.
Second aspect, the embodiment of the present invention provides a kind of device of wireless charging, comprising:
Acquiring unit, for obtaining the coupling feature information of opposite end, described coupling feature information is used for characterizing local terminal and rightBetween end, receive and dispatch the degree of coupling of electromagnetic wave signal;
Determining unit, determines local terminal frequency for the described coupling feature information of obtaining according to described acquiring unit, so thatLocal terminal frequency and opposite end frequency reach optimum Match.
The third aspect, the embodiment of the present invention provides a kind of system of wireless charging, comprises transmitting terminal and receiving terminal, described inThe device that transmitting terminal comprises the wireless charging as described in second aspect, wherein,
Described receiving terminal, for sending coupling feature information to described transmitting terminal, described coupling feature information is for characterizingBetween described receiving terminal and described transmitting terminal, receive and dispatch the degree of coupling of electromagnetic wave signal;
Described transmitting terminal, the described coupling feature information sending for obtaining described receiving terminal, and special according to described couplingReference breath is determined the tranmitting frequency of described transmitting terminal, so that the receive frequency of the tranmitting frequency of described transmitting terminal and described receiving terminalReach optimum Match.
Fourth aspect, the embodiment of the present invention provides a kind of system of wireless charging, comprises transmitting terminal and receiving terminal, described inThe device that receiving terminal comprises the wireless charging as described in second aspect, wherein,
Described transmitting terminal, for sending coupling feature information to described receiving terminal, described coupling feature information is for characterizingBetween described transmitting terminal and described receiving terminal, receive and dispatch the degree of coupling of electromagnetic wave signal;
Described receiving terminal, the described coupling feature information sending for obtaining described transmitting terminal, and special according to described couplingReference breath is determined the receive frequency of described receiving terminal, so that the tranmitting frequency of the receive frequency of described receiving terminal and described transmitting terminalReach optimum Match.
The method of the wireless charging that the embodiment of the present invention provides, Apparatus and system, can obtain the coupling feature letter of opposite endBreath, this coupling feature information is for characterizing the degree of coupling of receiving and dispatching electromagnetic wave signal between local terminal and opposite end, according to coupling featureInformation is determined local terminal frequency, so that local terminal frequency and opposite end frequency reach optimum Match. With receiving terminal in prior art and transmittingEnd frequency values immobilizes and compares, and can improve by the mode that regulates receiving terminal receive frequency and/or transmitting terminal tranmitting frequencyThe degree of coupling of electromagnetic wave signal, improves charge efficiency thus.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existingHave the accompanying drawing of required use in technical description to be briefly described, apparently, the accompanying drawing in the following describes is only thisSome embodiment of invention, for those of ordinary skill in the art, not paying under the prerequisite of creative work, all rightObtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the embodiment of the present invention based on the system architecture schematic diagram of wireless charging;
Fig. 2 is the method flow diagram of wireless charging in the embodiment of the present invention;
Fig. 3 is the method flow diagram of another wireless charging in the embodiment of the present invention;
Fig. 4 is the curve synoptic diagram of the electromagnetic wave signal that in the embodiment of the present invention, receiving terminal receives;
Fig. 5 is the method flow diagram of another wireless charging in the embodiment of the present invention;
Fig. 6 is the structural representation of the device of wireless charging in the embodiment of the present invention;
Fig. 7 is the structural representation of the device of another wireless charging in the embodiment of the present invention;
Fig. 8 is the system schematic of wireless charging in the embodiment of the present invention;
Fig. 9 is the system schematic of another wireless charging in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the present embodiment, the technical scheme in the present embodiment is clearly and completely described,Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based in the present inventionEmbodiment, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, allBelong to the scope of protection of the invention.
First the present embodiment briefly introduces the system architecture of wireless charging. As shown in Figure 1, this system architecture comprisesOne for sending the transmitting terminal of electromagnetic wave signal, and one for receiving the receiving terminal of electromagnetic wave signal, in practical applicationThis transmitting terminal can be arranged at charging base inside, and this receiving terminal can be arranged at electronic equipment internal. Transmitting terminal and receiving terminalAll there is the coil for electromagnetic coupled, both by the mode of electromagnetic induction carry out electric energy without physics medium transmission.
System architecture based on shown in Fig. 1 describes the present embodiment below.
For improving the degree of coupling of electromagnetic wave signal, the present embodiment provides a kind of method of wireless charging, as Fig. 2 instituteShow, described method comprises:
201, obtain the coupling feature information of opposite end.
Coupling feature information in the present embodiment is for characterizing the coupling journey of receiving and dispatching electromagnetic wave signal between local terminal and opposite endDegree, for example coupling feature information can be the charge efficiency of receiving terminal or the tranmitting frequency of transmitting terminal.
The device of wireless charging and can be positioned at the receiving terminal shown in Fig. 1 and also can be positioned at the transmitting shown in Fig. 1In end. In the time being positioned at receiving terminal, this receiving terminal is as the executive agent of the present embodiment, in the time being positioned at transmitting terminal, and this transmittingEnd is as the executive agent of the present embodiment.
It should be noted that the relative meaning that the statement of so-called " local terminal " or " opposite end " only flows to for embodying electromagnetic wave signalJustice, in the time that local terminal is transmitting terminal described in opposite end be receiving terminal, equally in the time that local terminal is receiving terminal described in opposite end be transmitting terminal. DescribedCoupling feature information, as the information that characterizes degree of coupling between local terminal and opposite end, can be obtained also from receiving terminal by transmitting terminalCan be obtained from transmitting terminal by receiving terminal, for the foundation of receiving terminal or the follow-up definite local terminal frequency of transmitting terminal.
202, determine local terminal frequency according to coupling feature information, so that local terminal frequency and opposite end frequency reach optimum Match.
Described in the time that local terminal is receiving terminal, local terminal frequency is receive frequency, in the time that local terminal is transmitting terminal described in local terminal frequency beTranmitting frequency. After getting the coupling feature information of opposite end, local terminal is determined local terminal frequency according to this coupling feature information, withMake local terminal frequency and opposite end frequency reach optimum Match, thereby improve the coupling of receiving and dispatching electromagnetic wave signal between local terminal and opposite endDegree.
So-called " optimum Match " can be that local terminal frequency values equates with opposite end frequency values, is difficult to reach two frequently in practical applicationRate value is equal in absolute sense, and the difference that therefore so-called " optimum Match " also comprises two frequency values is in certain allowed bandIn. For example, in the time that two frequency values differences are no more than 100Hz, are similar to and think that two frequency values mate.
In addition, so-called " optimum Match " also comprises according to local terminal ability and at utmost makes local terminal frequency approach opposite end frequency.For example, due to factor impacts such as device agings, the maximum frequency values that local terminal can reach is 1900Hz, and the frequency values of opposite end is2100Hz, local terminal is adjusted to maximum frequency values 1900Hz to approach opposite end frequency values as far as possible by current frequency values 1400Hz2100Hz。
In the present embodiment, local terminal can be in default moment value order perform step 201 and step 202, by local terminal frequencyAdjust to and the degree of opposite end frequency match, also can perform step 201 and step 202 according to user's triggering command order.In addition, local terminal can also, according to the execution step of Preset Time gap periods 201 and step 202, carry out many to local terminal frequencyInferior adjustment. The present embodiment does not limit opportunity and the number of times of adjusting local terminal frequency.
Conventionally, in prior art, comprise the mode of three kinds of wireless chargings: 1) electromagnetic induction, 2) radio wave and 3) magnetic fieldResonance, these three kinds of modes all relate to tranmitting frequency and receive frequency, for example wave frequency or magnetic resonance frequency. With electromagnetismBe sensed as example, in the time that the receive frequency of receiving terminal and the tranmitting frequency of transmitting terminal reach optimum Match (while producing resonance), connectDegree of coupling between receiving end and transmitting terminal is the highest, that is charge efficiency is the highest. When due to during the factor such as aging cause receivingWhen frequency is not mated with tranmitting frequency, the degree of coupling between receiving terminal and transmitting terminal reduces, and charge efficiency declines thereupon. At presentRelated science research show, the charging modes of radio wave can transmit the power of several watts, the charging side of electromagnetic inductionFormula can be transmitted tens watts of power to several hectowatts, and the charging modes of magnetic resonance can rise to through-put power kilowattRank. For the through-put power of rank like this, do not mate because of receive frequency and tranmitting frequency the power dissipation causing and should not be underestimated.The method of the wireless charging that the present embodiment provides, can obtain the coupling feature information of opposite end, and this coupling feature information is for tableLevy the degree of coupling of receiving and dispatching electromagnetic wave signal between local terminal and opposite end, determine local terminal frequency according to coupling feature information, so that thisEnd frequency and opposite end frequency reach optimum Match. Immobilize and compare with transmitting terminal frequency values with receiving terminal in prior art, canTo improve the degree of coupling of electromagnetic wave signal by the mode that regulates receiving terminal receive frequency and/or transmitting terminal tranmitting frequency, byThis improves charge efficiency, can also reduce the injury of electromagnetic radiation on human body and the acceleration impact on device aging simultaneously.
The present embodiment is positioned at receiving terminal for wireless charging device respectively and wireless charging device is positioned at transmitting terminal belowTwo kinds of situations, are elaborated and further expand the method shown in Fig. 1.
As shown in Figure 3, in the time that wireless charging device is positioned at receiving terminal, the method for described wireless charging comprises:
301, receiving terminal receives the electromagnetic wave signal that transmitting terminal sends.
Receiving terminal can send Indication message at charging forward emitted end, and instruction transmitting terminal sends electromagnetic wave to receiving terminal and surveysTrial signal also can receive the electromagnetic wave signal that transmitting terminal sends in real time in charging process. The present embodiment receives receiving terminalDo not limit the opportunity of electromagnetic wave signal.
302, receiving terminal extracts the tranmitting frequency of transmitting terminal transmission electromagnetic wave signal.
Tranmitting frequency when the coupling feature information that receiving terminal obtains is specially transmitting terminal transmission electromagnetic wave signal. ReceivingDuring to electromagnetic wave signal, thereby receiving terminal can extract by radio frequency sensor the tranmitting frequency of transmitting terminal transmission electromagnetic wave signalGet coupling feature information.
Optionally, the specific implementation of receiving terminal extraction tranmitting frequency is as follows:
302a, receiving terminal obtain frequency peak and the frequency valley of transmitting terminal transmission electromagnetic wave signal.
Receiving terminal for example, carries out discrete value to the electromagnetic wave signal that (1 millisecond in) receives in default duration, obtainsMultiple frequency values. The frequency values of numerical value maximum is wherein defined as frequency peak by receiving terminal, by the frequency values of numerical value minimum whereinBe defined as frequency valley. For example, the electromagnetic wave signal that receiving terminal receives in 1 millisecond as shown in curve in Fig. 4, receiving terminal withThe granularity of 0.1 millisecond is carried out discrete value to this electromagnetic wave signal, obtains 10 frequency values as shown in numerical value in Fig. 4. ThenReceiving terminal 2500Hz is defined as frequency peak, and 1900Hz is defined as to frequency valley.
The frequency peak getting and frequency valley are carried out geometrical mean calculating by 302b, receiving terminal, obtains transmitting frequentlyThe centre frequency of rate.
The computing formula of centre frequency is as shown in the formula shown in (1):
A × B - - - ( 1 )
Wherein, A is frequency peak, and B is frequency valley. Taking Fig. 4 as example, the centre frequency of tranmitting frequency isEqual 2180Hz.
303, receiving terminal is tabled look-up and is obtained capacitance adjustment amount according to the tranmitting frequency of transmitting terminal.
In receiving terminal, be preset with the mapping relations table for obtaining capacitance adjustment amount, this mapping relations table is used for setting up transmittingMapping relations between frequency and capacitance adjustment amount, wherein, capacitance adjustment amount can be in LC loop on electric capacity between bottom crownSpacing d.
Optionally, described mapping relations table is for setting up the mapping relations between centre frequency and capacitance adjustment amount, whereinDescribed centre frequency is the centre frequency of transmitting terminal tranmitting frequency, the centre frequency that in step 302, receiving terminal extracts. Described reflectingPenetrate relation table can shape as following table:
Centre frequency (Hz) Polar plate spacing (mm)
1500 2.5
1550 3.75 4 -->
2500 4.45
304, receiving terminal regulates the capacitance in LC loop according to capacitance adjustment amount.
Receiving terminal regulates the capacitance in LC loop according to capacitance adjustment amount, change thus the receive frequency of self, thereby makeThe difference of the tranmitting frequency of self receive frequency and transmitting terminal is in preset range.
Concrete, the formula formula specific as follows of calculating capacitance:
C=εS/4πkd(2)
Wherein, C is capacitance, and ε is a constant, and the right opposite that S is capacitor plate is long-pending, and k is electrostatic force constant, and d is electricityHold polar plate spacing. Known according to formula (2), the relation that is inversely proportional between polar plate spacing d and capacitance C, receiving terminal can be by increasingThe mode of the large upper and lower polar plate spacing d of electric capacity reduces the capacitance C in LC loop, or by reducing the upper and lower polar plate spacing d's of electric capacityMode improves the capacitance C in LC loop.
Conventionally, LC loop is inner occur coil magnetic field can and capacitive field energy between mutual conversion, consequent largeLittle and direction is all made periodically variable electric current oscillating current. Oscillating current is the alternating current that a kind of frequency is very high, can onlyProduced by the oscillating circuit such as such as LC loop. In the present embodiment, receiving terminal regulates receive frequency by changing LC tank capacitance valuePrinciple be: change the duration of capacitor charge and discharge by the ability that changes capacitive charge storage, change thus magnetic field energy and electric fieldThe frequency transforming between energy, and then change the frequency of shaking electric current, thus receive frequency is changed.
It should be noted that, in the method shown in Fig. 3, frequency numerical value and polar plate spacing value d are only as an exampleUse, do not form the restriction to concrete numerical value in practical application.
In the present embodiment, mainly by the mode of adjusting capacitor plate spacing d, the receive frequency of receiving terminal is adjusted,In addition receiving terminal can also be adjusted the receive frequency of receiving terminal by the mode of adjusting the long-pending S of capacitor plate right opposite, itsAdjust principle identical with the principle shown in Fig. 3 step 304, repeat no more herein.
Electric capacity in practical application in receiving terminal LC loop can also be piezoelectric type variable capacitance, and receiving terminal passes through piezoelectricityThe upper bottom crown of formula variable capacitance applies different voltage capacitance is adjusted. Concrete, it is upper and lower that receiving terminal increases electric capacityPolar plate voltage to be to improve the capacitance in LC loop, or reduces the upper and lower polar plate voltage of electric capacity to reduce the capacitance in LC loop. Work as electricityHold regulated quantity while being the upper and lower polar plate voltage of electric capacity, above-mentioned mapping relations table can also shape as following table:
Centre frequency (Hz) Polar plate voltage (mV)
1500 34
1550 77
2500 120
The method of the wireless charging that the present embodiment provides, can, using receiving terminal as frequency adjustment object, be obtained by receiving terminalGet the tranmitting frequency of transmitting terminal, then according to the capacitance in this tranmitting frequency adjustment self LC loop, connecing self thusReceive frequency and be adjusted into the frequency values that reaches optimum Match with transmitting terminal tranmitting frequency, improve thus the degree of coupling of transmitting-receiving two-end.Immobilize and compare with transmitting terminal frequency values with receiving terminal in prior art, can be by regulating the mode of receiving terminal receive frequencyImprove the degree of coupling of receiving and dispatching electromagnetic wave signal between receiving terminal and transmitting terminal, and then improve charge efficiency.
As shown in Figure 5, in the time that wireless charging device is positioned at transmitting terminal, the method for described wireless charging comprises:
501, transmitting terminal repeatedly sends electromagnetic wave signal with different tranmitting frequencies to receiving terminal in default duration.
Transmitting terminal repeatedly sends electromagnetic wave test signal with different tranmitting frequencies to receiving terminal, at each electromagnetic wave that sendsWhen signal, transmitting terminal is according to the capacitance in predetermined capacitive regulated quantity adjusting self LC loop, so that according to default frequency stepProduce different tranmitting frequencies. Predetermined capacitive regulated quantity can be capacitor plate spacing, for example, be 0.5mm, described frequency stepFor the frequency variation of corresponding 0.5mm spacing. Transmitting terminal starts taking capacitor plate spacing as 0mm, increases 0.5mm, then at every turnObtain a tranmitting frequency, and send electromagnetic wave signal according to this tranmitting frequency to receiving terminal. Transmitting terminal is adjusted according to predetermined capacitiveIn joint amount adjusting self LC loop, in the principle of capacitance and Fig. 3 step 304, receiving terminal regulates self LC according to capacitance adjustment amountIn loop, the principle of capacitance is identical, repeats no more herein.
Transmitting terminal repeatedly sends electromagnetic wave test signal at charging Forward receiving end, also can be in charging process in real time toReceiving terminal sends electromagnetic wave signal. Do not limit the opportunity that the present embodiment sends electromagnetic wave signal to transmitting terminal.
502, transmitting terminal obtains the charge efficiency that receiving terminal sends at every turn in the time receiving electromagnetic wave signal.
Receiving terminal obtains the charge efficiency of self in the process that receives electromagnetic wave signal, and this charge efficiency is a percentageRatio, for example, for the ratio of the electric energy that receives under the electric energy that characterizes the actual reception of receiving terminal in the unit interval and ideal conditions, chargingEfficiency can be 80% or 90%.
Described in the present embodiment, default duration can be one minute or five minutes. Preferably, transmitting terminal can be wholeIn the process of charging, constantly receive the charge efficiency that receiving terminal sends, for example, received once every 20 seconds. Receiving charge efficiencyTime, transmitting terminal can send the solicited message by request charge efficiency to receiving terminal, and receives carrying of receiving terminal feedback and fillThe request response of electrical efficiency. In addition, transmitting terminal can also directly receive the charging effect that receiving terminal sends according to Preset Time intervalRate, the present embodiment does not limit this.
503, transmitting terminal, by corresponding charge efficiency the highest efficiency value tranmitting frequency, is defined as the transmitting of transmitting terminal frequentlyRate.
For example transmitting terminal got 80%, 75%, 84%, 92%, 78%, 84% and 95% 7 and fills in one minuteElectrical efficiency. It is follow-up that 95% the highest corresponding tranmitting frequency of efficiency value in these seven charge efficiencies is defined as transmitting terminal by transmitting terminalSend the tranmitting frequency of electromagnetic wave signal.
The mode of obtaining charge efficiency for transmitting terminal by solicited message, transmitting terminal can carry one in solicited messageThe individual flag bit that is no less than 1 bit, and receiving terminal is carried at this flag bit in request response and feeds back to transmitting terminal. TransmittingEnd is determined and is responded corresponding solicited message with this request by this flag bit, determines thus the delivery time of this solicited message, entersAnd the tranmitting frequency engraving during by this is defined as the tranmitting frequency corresponding with this charge efficiency. In definite the highest charging of efficiency valueAfter efficiency, transmitting terminal determines tranmitting frequency that should charge efficiency according to this solicited message, request response and flag bit, fromAnd this tranmitting frequency is defined as to the tranmitting frequency after frequency is adjusted.
Directly obtain the mode of the charge efficiency of receiving terminal transmission for transmitting terminal, receiving terminal can send charge efficiencyInformation in carry a timestamp, this timestamp sends the moment value of charge efficiency for mark receiving terminal. Due to receiving terminalAnd between transmitting terminal, data interaction is consuming time extremely short, can be similar to and ignore, and therefore transmitting terminal, can in the time receiving charge efficiencyTo obtain timestamp corresponding to this charge efficiency, the transmitting of electromagnetic wave signal will be sent in the moment value at this timestamp institute markFrequency is defined as the tranmitting frequency of the follow-up transmission electromagnetic wave signal of transmitting terminal.
Preferably, in the process of wireless charging, transmitting terminal can constantly receive the charge efficiency that receiving terminal sends, oftenInferior while receiving a charge efficiency, efficiency value maximum in this efficiency value and the efficiency value having received is before this compared,If the efficiency value of current reception is greater than efficiency value maximum in the efficiency value having received before this, transmitting terminal is by current correspondence effectThe tranmitting frequency of rate value is defined as the tranmitting frequency of the follow-up transmission electromagnetic wave signal of transmitting terminal.
The method of the wireless charging that the present embodiment provides, can, using transmitting terminal as frequency adjustment object, be existed by transmitting terminalIn default duration, repeatedly send electromagnetic wave signal with different tranmitting frequencies to receiving terminal, then obtain receiving terminal in each receptionThe charge efficiency sending during to electromagnetic wave signal, is defined as corresponding charge efficiency the highest efficiency value tranmitting frequency to send outPenetrate the tranmitting frequency of end. Adjustment foundation using charge efficiency as tranmitting frequency, selects to make transmitting-receiving by the mode of compliance test resultTwo ends degree of coupling reaches the tranmitting frequency of optimum state. With receiving terminal in prior art and the transmitting terminal frequency values phase that immobilizesRatio, can improve the coupling of receiving and dispatching electromagnetic wave signal between receiving terminal and transmitting terminal by the mode that regulates receiving terminal receive frequencyDegree, and then improve charge efficiency.
With reference to the realization of said method, the present embodiment also provides a kind of device of wireless charging, and this device can be positioned atReceiving terminal also can be positioned at transmitting terminal, for the receive frequency receiving or the tranmitting frequency of transmitting terminal are adjusted, so thatThe frequency match of transmitting-receiving two-end, thereby the degree of coupling of raising transmitting-receiving two-end. As shown in Figure 6, described device 61 comprises: obtain listUnit 611, determining unit 612, wherein,
Described acquiring unit 611, for obtaining the coupling feature information of opposite end, described coupling feature information is used for characterizing thisBetween end and opposite end, receive and dispatch the degree of coupling of electromagnetic wave signal;
Described determining unit 612, determines local terminal for the described coupling feature information of obtaining according to described acquiring unit 611Frequency, so that local terminal frequency and opposite end frequency reach optimum Match.
Further, as shown in Figure 7, described acquiring unit 611 specifically comprises:
Receive subelement 711, the electromagnetic wave signal sending for receiving transmitting terminal;
Extract subelement 712, extract described sending out for the described electromagnetic wave signal receiving from described reception subelement 711Penetrate the tranmitting frequency of end;
Send subelement 713, for repeatedly send electromagnetic wave with different tranmitting frequencies to receiving terminal in default durationSignal;
Obtain subelement 714, the charge efficiency sending in the time at every turn receiving electromagnetic wave signal for obtaining receiving terminal,Described charge efficiency is for characterizing the electric energy receiving under the electric energy of the actual reception of described receiving terminal in the unit interval and ideal conditionsRatio;
Described determining unit 612 specifically comprises:
Search subelement 715, for tabling look-up and obtain capacitance adjustment amount according to the tranmitting frequency of described transmitting terminal;
Regulate subelement 716, for searching described capacitance adjustment amount that subelement 715 searches and connect described in regulating according to describedThe capacitance in LC loop in receiving end, so that the tranmitting frequency of the receive frequency of described receiving terminal and described transmitting terminal reaches bestJoin;
Determine subelement 717, for to obtain the charge efficiency institute that efficiency value that subelement 714 obtains is the highest corresponding by describedTranmitting frequency, be defined as the tranmitting frequency of described transmitting terminal.
Further, described extraction subelement 712 specifically for:
Extract described transmitting terminal and send the tranmitting frequency of described electromagnetic wave signal by radio frequency sensor;
Described adjusting subelement 716 is specifically for described transmission subelement 713 is each while sending electromagnetic wave signal, according toPredetermined capacitive regulated quantity regulates the capacitance in LC loop in described transmitting terminal, to produce different according to default frequency stepTranmitting frequency.
Further, described adjusting subelement 716 specifically for increase the upper and lower polar plate spacing of electric capacity in case reduce LC loopCapacitance;
Described adjusting subelement 716 also specifically for reducing the upper and lower polar plate spacing of electric capacity to improve the electric capacity in LC loopValue;
Described adjusting subelement 716 also specifically for increasing the upper and lower polar plate voltage of electric capacity to improve the electric capacity in LC loopValue;
Described adjusting subelement 716 also specifically for reducing the upper and lower polar plate voltage of electric capacity to reduce the electric capacity in LC loopValue.
The device of the wireless charging that the present embodiment provides, can obtain the coupling feature information of opposite end, this coupling feature letterBreath, for characterizing the degree of coupling of receiving and dispatching electromagnetic wave signal between local terminal and opposite end, determines that according to coupling feature information local terminal frequentlyRate, so that local terminal frequency and opposite end frequency reach optimum Match. Fixing not with receiving terminal in prior art and transmitting terminal frequency valuesIn a disguised form than, can be by regulating the mode of receiving terminal receive frequency and/or transmitting terminal tranmitting frequency improve the coupling of electromagnetic wave signalClose degree, improve thus charge efficiency, can also reduce injury and the adding device aging of electromagnetic radiation to human body simultaneouslySpeed impact.
Further, with reference to the method shown in figure 3, the present embodiment also provides a kind of system of wireless charging, for realizingMethod shown in Fig. 3. As shown in Figure 8, described system comprises transmitting terminal 81 and receiving terminal 82, and described receiving terminal 82 comprises as Fig. 6Or the device 61 of the wireless charging shown in Fig. 7, wherein,
Described transmitting terminal 81, for sending coupling feature information to described receiving terminal 82, described coupling feature information is used forCharacterize the degree of coupling of receiving and dispatching electromagnetic wave signal between described transmitting terminal 81 and described receiving terminal 82;
Described receiving terminal 82, the described coupling feature information sending for obtaining described transmitting terminal 81, and according to described couplingClose characteristic information and determine the receive frequency of described receiving terminal 82, so that the receive frequency of described receiving terminal 82 and described transmitting terminal 81Tranmitting frequency reach optimum Match.
The system of the wireless charging that the present embodiment provides, can, using receiving terminal as frequency adjustment object, be obtained by receiving terminalGet the coupling feature information of transmitting terminal, this coupling feature information is used for characterizing between receiving terminal and transmitting terminal receives and dispatches electromagnetic wave signalDegree of coupling, receiving terminal is determined the receive frequency of self according to coupling feature information, so as the receive frequency of receiving terminal with send outThe tranmitting frequency of penetrating end reaches optimum Match. Immobilize and compare with transmitting terminal frequency values with receiving terminal in prior art, canBy regulating the mode of receiving terminal receive frequency to improve the degree of coupling of electromagnetic wave signal, improve thus charge efficiency, also simultaneouslyCan reduce the injury of electromagnetic radiation on human body and the acceleration impact on device aging.
Further, with reference to the method shown in figure 5, the present embodiment also provides a kind of system of wireless charging, for realizingMethod shown in Fig. 5. As shown in Figure 9, described system comprises transmitting terminal 91 and receiving terminal 92, and described transmitting terminal 91 comprises as Fig. 6Or the device 61 of the wireless charging shown in Fig. 7, wherein,
Described receiving terminal 92, for sending coupling feature information to described transmitting terminal 91, described coupling feature information is used forCharacterize the degree of coupling of receiving and dispatching electromagnetic wave signal between described receiving terminal 92 and described transmitting terminal 91;
Described transmitting terminal 91, the described coupling feature information sending for obtaining described receiving terminal 92, and according to described couplingClose characteristic information and determine the tranmitting frequency of described transmitting terminal 91, so that the tranmitting frequency of described transmitting terminal 91 and described receiving terminal 92Receive frequency reach optimum Match.
The system of the wireless charging that the present embodiment provides, can, using transmitting terminal as frequency adjustment object, be obtained by transmitting terminalGet the coupling feature information of receiving terminal, this coupling feature information is used for characterizing between receiving terminal and transmitting terminal receives and dispatches electromagnetic wave signalDegree of coupling, transmitting terminal is determined the tranmitting frequency of self according to coupling feature information, so as the tranmitting frequency of transmitting terminal with connectThe receive frequency of receiving end reaches optimum Match. Immobilize and compare with transmitting terminal frequency values with receiving terminal in prior art, canBy regulating the mode of transmitting terminal tranmitting frequency to improve the degree of coupling of electromagnetic wave signal, improve thus charge efficiency, also simultaneouslyCan reduce the injury of electromagnetic radiation on human body and the acceleration impact on device aging.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can borrowThe mode that helps software to add essential common hardware realizes, and can certainly pass through hardware, but in a lot of situation, the former is betterEmbodiment. Based on such understanding, the portion that technical scheme of the present invention contributes to prior art in essence in other wordsDivide and can embody with the form of software product, this computer software product is stored in the storage medium can read, as meterThe floppy disk of calculation machine, hard disk or CD etc., comprise some instructions in order to make a computer equipment (can be personal computer,Server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyBe familiar with those skilled in the art in the technical scope of the present invention's exposure, can expect easily changing or replacing, all should containCover within protection scope of the present invention. Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.

Claims (8)

1. a method for wireless charging, is characterized in that, comprising:
Obtain the coupling feature information of opposite end, described coupling feature information is used for characterizing receives and dispatches electromagnetic wave letter between local terminal and opposite endNumber degree of coupling;
Determine local terminal frequency according to described coupling feature information, so that local terminal frequency and opposite end frequency reach optimum Match;
The described coupling feature information of obtaining opposite end, specifically comprises: receive the electromagnetic wave signal that transmitting terminal sends, extract described sending outPenetrate the tranmitting frequency of the described electromagnetic wave signal of end transmission;
Describedly determine local terminal frequency according to described coupling feature information, specifically comprise: look into according to the tranmitting frequency of described transmitting terminalTable obtain capacitance adjustment amount, regulate the capacitance in LC loop in described receiving terminal according to described capacitance adjustment amount, so as described in connectThe receive frequency of receiving end and the tranmitting frequency of described transmitting terminal reach optimum Match;
Or,
The described coupling feature information of obtaining opposite end, specifically comprises: in default duration with different tranmitting frequencies to receiving terminalRepeatedly send electromagnetic wave signal, and obtain the charge efficiency that receiving terminal sends at every turn in the time receiving electromagnetic wave signal, described inCharge efficiency is for the ratio of the electric energy that receives under the electric energy that characterizes the actual reception of described receiving terminal in the unit interval and ideal conditions;
Describedly determine local terminal frequency according to described coupling feature information, specifically comprise: by right charge efficiency institute the highest efficiency valueThe tranmitting frequency of answering, is defined as the tranmitting frequency of described transmitting terminal.
2. the method for wireless charging according to claim 1, is characterized in that, described in the described transmitting terminal of described extraction sendsThe tranmitting frequency of electromagnetic wave signal, specifically comprises:
Extract described transmitting terminal and send the tranmitting frequency of described electromagnetic wave signal by radio frequency sensor;
Describedly in default duration, repeatedly send electromagnetic wave signal with different tranmitting frequencies to receiving terminal, specifically comprise:
In the time of each transmission electromagnetic wave signal, regulate the capacitance in LC loop in described transmitting terminal according to predetermined capacitive regulated quantity,To produce different tranmitting frequencies according to default frequency step.
3. the method for wireless charging according to claim 1 and 2, is characterized in that, when described capacitance adjustment amount is electric capacityWhen upper and lower polar plate spacing, the capacitance in described adjusting LC loop, specifically comprises:
Increase the upper and lower polar plate spacing of electric capacity to reduce the capacitance in LC loop, or reduce the upper and lower polar plate spacing of electric capacity to improveThe capacitance in LC loop;
Or in the time that described capacitance adjustment amount is voltage, the capacitance in described adjusting LC loop, specifically comprises:
Increase the upper and lower polar plate voltage of electric capacity to improve the capacitance in LC loop, or reduce the upper and lower polar plate voltage of electric capacity to reduceThe capacitance in LC loop.
4. a device for wireless charging, is characterized in that, comprising:
Acquiring unit, for obtaining the coupling feature information of opposite end, described coupling feature information be used for characterizing local terminal and opposite end itBetween receive and dispatch the degree of coupling of electromagnetic wave signal;
Determining unit, determines local terminal frequency for the described coupling feature information of obtaining according to described acquiring unit, so that local terminalFrequency and opposite end frequency reach optimum Match;
Described acquiring unit specifically comprises:
Receive subelement, the electromagnetic wave signal sending for receiving transmitting terminal;
Extract subelement, the transmitting of extracting described transmitting terminal for the described electromagnetic wave signal receiving from described reception subelementFrequency;
Described determining unit specifically comprises:
Search subelement, for tabling look-up and obtain capacitance adjustment amount according to the tranmitting frequency of described transmitting terminal;
Regulate subelement, for searching the described capacitance adjustment amount that subelement searches and regulate described receiving terminal LC to return according to describedThe capacitance on road, so that the tranmitting frequency of the receive frequency of described receiving terminal and described transmitting terminal reaches optimum Match;
Or,
Described acquiring unit specifically comprises:
Send subelement, for repeatedly send electromagnetic wave signal with different tranmitting frequencies to receiving terminal in default duration;
Obtain subelement, the charge efficiency sending in the time at every turn receiving electromagnetic wave signal for obtaining receiving terminal, described in fillElectrical efficiency is for the ratio of the electric energy that receives under the electric energy that characterizes the actual reception of described receiving terminal in the unit interval and ideal conditions;
Described determining unit specifically comprises:
Determine subelement, for obtaining the corresponding transmitting of charge efficiency that efficiency value that subelement obtains is the highest frequently by describedRate, is defined as the tranmitting frequency of described transmitting terminal.
5. the device of wireless charging according to claim 4, is characterized in that, described extraction subelement specifically for:
Extract described transmitting terminal and send the tranmitting frequency of described electromagnetic wave signal by radio frequency sensor;
Described adjusting subelement specifically for:
In the time that described transmission subelement sends electromagnetic wave signal at every turn, regulate LC in described transmitting terminal according to predetermined capacitive regulated quantityThe capacitance in loop, to produce different tranmitting frequencies according to default frequency step.
6. according to the device of the wireless charging described in claim 4 or 5, it is characterized in that:
Described adjusting subelement specifically for increasing the upper and lower polar plate spacing of electric capacity to reduce the capacitance in LC loop;
Described adjusting subelement also specifically for reducing the upper and lower polar plate spacing of electric capacity to improve the capacitance in LC loop;
Described adjusting subelement also specifically for increasing the upper and lower polar plate voltage of electric capacity to improve the capacitance in LC loop;
Described adjusting subelement also specifically for reducing the upper and lower polar plate voltage of electric capacity to reduce the capacitance in LC loop.
7. a system for wireless charging, is characterized in that, described system comprises transmitting terminal and receiving terminal, and described transmitting terminal comprisesIf claim 4 is to the device of the wireless charging as described in any one in claim 6, wherein,
Described receiving terminal, for sending coupling feature information to described transmitting terminal, described in described coupling feature information is used for characterizingBetween receiving terminal and described transmitting terminal, receive and dispatch the degree of coupling of electromagnetic wave signal;
Described transmitting terminal, the described coupling feature information sending for obtaining described receiving terminal, and according to described coupling feature letterBreath is determined the tranmitting frequency of described transmitting terminal, so that the receive frequency of the tranmitting frequency of described transmitting terminal and described receiving terminal reachesOptimum Match.
8. a system for wireless charging, is characterized in that, described system comprises transmitting terminal and receiving terminal, and described receiving terminal comprisesIf claim 4 is to the device of the wireless charging as described in any one in claim 6, wherein,
Described transmitting terminal, for sending coupling feature information to described receiving terminal, described in described coupling feature information is used for characterizingBetween transmitting terminal and described receiving terminal, receive and dispatch the degree of coupling of electromagnetic wave signal;
Described receiving terminal, the described coupling feature information sending for obtaining described transmitting terminal, and according to described coupling feature letterBreath is determined the receive frequency of described receiving terminal, so that the tranmitting frequency of the receive frequency of described receiving terminal and described transmitting terminal reachesOptimum Match.
CN201310136835.5A 2013-04-18 2013-04-18 The method of wireless charging, Apparatus and system CN103236567B (en)

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