CN101330230A - Wireless power supply system and method - Google Patents
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Abstract
The invention discloses a wireless power supply system which comprises at least one energy-supply host node and at least one energy-consumption slave node. The host node comprises a host node antenna, a main control module, a main resonance loop, a main oscillation regulation module, a power drive module and a main communication module. The slave node comprises a slave node antenna, a secondary control module, a secondary resonance loop, a secondary oscillation regulation module, a power output module and a secondary communication module. The system further comprises at least an auxiliary node on the premise that the power supply system comprises only one host node and one slave node. The auxiliary node at least comprises a positioning communication module used for providing the host node with the information for positioning the slave node. The host node calculates the optimal control parameter according to the request and controls the operation of the host node and the slave node according to the obtained parameter, thereby realizing the efficiency optimization on the premise that the energy transfer meets the requirements. The invention also discloses a wireless power supply method. The method can control the resonance state of the coupled electromagnetic resonance between the host node and the slave node, thereby realizing the short-distance high-efficiency energy transfer.
Description
[technical field]
The present invention relates to the wireless power technology, be specifically related to a kind of wireless power supply system and wireless power method.
[background technology]
Along with development of science and technology, the degree of freedom of people's activity increases greatly, and the appearance of intelligent terminals such as mobile phone makes the seamless information-intensive society that inserted of people, uses but wireless technology still rests on message area for a long time, and its energy response does not obtain due development.So the equipment that we use all must configuration power line or assemble.The idea of wireless power is of long duration, and still well-known is that electromagnetic wave is understood emission energy to all the winds in the middle of the process of transmission of power, thereby makes power supplying efficiency extremely low.2007, the researcher of the Massachusetts Institute of Technology adopted a kind of technology of similar resonance, allowed power supply unit and bulb adopt the electromagnetic wave of same frequency to carry out certain mode " connection ".Under this mode, the loss of energy is minimum.According to statistics, when this system carried 60W power on 2 meters distance, transmission of power efficient reached 40% to 45%, half energy loss was promptly arranged in transmission course.As an experimental program, its shortcoming is: its equipment only is a simple fixture, can not dynamically adjust parameters, and it is for realizing a comparatively complicated System with Nonlinear Coupling, it is very difficult reaching the tuning of precision, or even can not finish; Receiving system oversize is inconvenient to use; The coaxial control of coupling coil requires quite harsh; Transmission of power efficient also has suitable gap with 80%～90% calculated value.In addition, the wireless power desktop of more existing contacts, wireless charger etc., but these products all belong to ultra micro apart from system, i.e. and power supply and load must very closely put together, and do not reach the purpose of short-distance wireless power supply.
[summary of the invention]
Main purpose of the present invention solves the problems of the prior art exactly, and a kind of wireless power supply system and method are provided, and can effectively realize short-range wireless power application.
For achieving the above object, the invention provides a kind of wireless power supply system, comprise the host node of at least one energy supply and at least one be subjected to can from node, it is characterized in that:
Described host node comprises main control module, power driver module, the main resonance loop, the main oscillations adjustment module, host node antenna and main communication module, described power driver module is used to provide the generation electromagnetic viscosimeter required alternating current, described main resonance loop is used to produce electromagnetic viscosimeter, described host node antenna is used to broadcast electromagnetic viscosimeter, described main oscillations adjustment module is used to regulate the eigenfrequency of host node electromagnetic viscosimeter structure, described main communication module is used for carrying out radio communication with other node, and described main control module is used to control and coordinate the work of each several part in the described host node;
Described from node comprise from the control module, from resonant tank, from the vibration adjustment module, power output module, from the node antenna with from communication module, describedly be used to receive electromagnetic viscosimeter from the node antenna, describedly be used to produce electromagnetic resonance from resonant tank, describedly be used to regulate eigenfrequency from node electromagnetic viscosimeter structure from the vibration adjustment module, described power output module is used for the electric energy of electromagnetic viscosimeter conversion is offered load, describedly be used for carrying out radio communication, describedly be used to control and coordinate described work from the intranodal each several part from the control module with other node from communication module;
Respectively be under one the situation, also to comprise at least one auxiliary node at described host node with from node, described auxiliary node comprises the positioning and communicating module at least, is used for being provided for locating described information from node to described host node.
In the preferred scheme, be under at least two the situation, also to comprise at least one auxiliary node at described host node and/or from node, described auxiliary node comprises the positioning and communicating module at least, is used for being provided for locating described information from node to described host node.
Described main control module comprises response control unit, be used for when the request that receives from node, the position in system according to our node and supplicant node, judge whether our node is the host node that is in the optimum position of regulation, be then to respond this request to make our node enter the energy supply state, otherwise do not respond.
Described main control module also comprises authenticating unit, is used for judging whether supplicant node is the node of our node mandate when the request that receives from node, is then to be continued to handle by described main control module, otherwise stops response.
Described main control module is according to relational expression: P
o/ P
i=η (f, ω
S, ω
D, d, Φ t), calculates as energy conversion efficiency P
o/ P
iWhen reaching maximum, parameter f, ω
S, ω
DAnd the value of Φ, wherein, P
iThe input power of expression host node, P
oExpression is from the power output of node, and η represents energy conversion efficiency, and f represents the frequency of the alternating current that power driver module provides, ω
SThe eigenfrequency of expression host node electromagnetic viscosimeter structure, ω
DExpression is from the eigenfrequency of node electromagnetic viscosimeter structure, d represents the distance between the main and subordinate node, Φ represents the azimuth between the master and slave node antenna, and d that is used to calculate and the value of Φ are obtained according to the location algorithm estimation according to the intercommunication mutually between the communication module of the master and slave node that carries out the energy transmission and other node by main control module; T is a time quantum, and the maximum of energy conversion efficiency does not rely on t under the system stability state;
Described main control module is regulated and control the eigenfrequency of described host node electromagnetic viscosimeter structure, the frequency of alternating current, the angle of departure of host node antenna according to described calculated value, and it is described from the control module by the communication notifications of described master and slave node communication module, regulate and control described from node electromagnetic viscosimeter structure eigenfrequency and from the acceptance angle of node antenna, described azimuthal adjustment realizes by the angle of departure of regulation and control host node antenna with from the acceptance angle of node antenna.
Described main control module comprises the demand judgement unit, be used to judge whether the power output from node when energy conversion efficiency is maximum satisfies the power output demand of supplicant node, be then by the master control module controls power transfer, otherwise send the message of refusal power supply or notify it to switch to the message of other host node to supplicant node.
Described power output module comprises the output monitoring means, described main control module comprises comparing unit, the described output monitoring means sampling output signal of telecommunication, the described currency that feeds back its power output from node according to described sampled signal to described host node, output power value and described currency when described comparing unit is maximum with energy conversion efficiency compare, described main control module reaches predetermined requirement according to the control signal that result relatively adjusts its output until the result who makes comparison.
A kind of wireless power method, be used for a kind of wireless power supply system, this system comprise the host node of at least one energy supply and at least one be subjected to can from node, and respectively be under one the situation at described host node with from node, also comprise at least one auxiliary node, it is characterized in that this method may further comprise the steps:
A, host node receive next energy supply request since node by radio communication, judge this position in the following manner: only have a host node and one under the situation of node in this system from node, host node receives locating information from auxiliary node by radio communication simultaneously, and carries out the position judgment of supplicant node in conjunction with this locating information; Have at least two host nodes and/or two under the situation of node in this system, host node is in conjunction with carrying out the position judgment of supplicant node with the radio communication of other node;
B, according to this request calculating optimum the control value of consult volume, it comprises: the eigenfrequency value of host node electromagnetic viscosimeter structure, the frequency values of the required alternating current that provides of host node, from the eigenfrequency value of node electromagnetic viscosimeter structure, the value of the angle of departure of host node antenna and from the value of the acceptance angle of node antenna; And generation includes the control signal of aforementioned calculation value;
C, the appropriate section in the above-mentioned control signal is sent to from node, controls master and slave node and carry out the adjustment of the state of each self-operating by the aforementioned calculation value by radio communication, until the state of actual motion with respect to the satisfied requirement of predesignating of aforementioned calculation value; Described operation comprises: host node transfers civil power or direct current high-frequency alternating current to and produces electromagnetic viscosimeter, the resonant tank of electromagnetic viscosimeter autonomous node reaches resonant tank from node via master and slave node antenna, the electromagnetism field energy that obtains is converted to AC energy and offers load by electromagnetic induction from node.
Preferably, in the described steps A, also comprise and judge this position from node in the following manner: this system has at least two host nodes and/or under the situation of node and at least one auxiliary node, and host node is in conjunction with carrying out the position judgment of supplicant node with the radio communication of other master and slave node and auxiliary node.
In the described steps A, when the request that receives from node, the position in system according to our node and supplicant node is judged whether our node is the host node that is in the optimum position of regulation, is then to handle this request, otherwise will not be responded earlier.
In the described steps A, when the request that receives from node, also authentication is carried out in the request from node, judge whether supplicant node is the node of our node mandate, is then to handle this request, otherwise will not respond.
Described step B comprises following substep:
B1, set up energy conversion efficiency equation: P
o/ P
i=η (f, ω
S, ω
D, d, Φ, t), this equation links together host node and the power frequency variation in the node antenna;
Wherein, P
iThe input power of expression host node, P
oExpression is from the power output of node, and η represents energy conversion efficiency, and f represents the frequency of host node alternating current, ω
SThe eigenfrequency of expression host node electromagnetic viscosimeter structure, ω
DExpression is from the eigenfrequency of node electromagnetic viscosimeter structure, d represents the distance between the main and subordinate node, Φ represents the azimuth between the master and slave node antenna, and d that is used to calculate and the value of Φ are obtained according to the communication estimation between the communication module of the master and slave node that carries out the energy transmission and other node by main control module; T is a time quantum, and the maximum of energy conversion efficiency does not rely on t under the system stability state;
B2, calculate when energy conversion efficiency η reaches maximum control parameter f, ω
S, ω
DAnd the value of Φ.
Among the described step B, before the control value of consult volume of calculating optimum, judge when energy conversion efficiency is got maximum earlier, whether satisfy the power output demand of supplicant node from the power output of node, be then to enter next step, otherwise send the message of refusal power supply or notify it to switch to the message of other host node to supplicant node.
Among the described step B, power output from node is monitored, feedback is from the currency of the power output of node, output power value when energy conversion efficiency is maximum and this currency compare, host node reaches predetermined requirement according to the control signal that result relatively adjusts its output until the result who makes comparison.
The invention has the beneficial effects as follows:
In the wireless power supply system of the present invention, the host node of energy supply to the request energy supply can be from the location of node by other host node, carry out from the radio communication between the communication module of node and auxiliary node, can realize that energy of electromagnetic field concentrates, effectively, transmit accurately.
Main control module in the host node is according to calculate best control value of consult volume from the node request, and according to the eigenfrequency of calculated value regulation and control host node electromagnetic viscosimeter structure, the frequency of alternating current, the angle of departure of host node antenna, utilize the radio communication notice from node, regulation and control are from the eigenfrequency of node electromagnetic viscosimeter structure and from the acceptance angle of node antenna, thereby the energy supply state is satisfied from the node energy demand, in preferred scheme, obtain when energy conversion efficiency reaches maximum, each controls parameter---the frequency of host node alternating current, the eigenfrequency of host node electromagnetic viscosimeter structure, from the eigenfrequency of node electromagnetic viscosimeter structure and the azimuthal value between the main and subordinate node oscillating structure, and regulate and control the work of each module in view of the above, the state of the actual motion that transmits until energy is with respect to the satisfied requirement of predesignating of this calculated value.By above-mentioned means, the present invention can realize the optimization of energy conversion efficiency.
The present invention is by introducing the information interaction of energy source and load end, can be by designing accurate digital control circuit as master and slave control module, control host node (energy transmitting terminal) and, reach the purpose of short distance energy efficient transmission from the resonance condition of coupling electromagentic resonance structure between the node (energy receiving terminal).By improving energy transmission efficiency, can effectively reduce the energy transmitting power with the electromagnetic compatibility of the fail safe that guarantees wireless power, equipment with to the Safety Effect of health, also help the antitheft and anti-leak mechanism that realizes radio energy.
Among the present invention, control parameter f, ω
S, ω
DCan preferably regulate with Φ, carry out negative feedback control from the power output of node, thereby reach best power transfer effect by real-time monitoring by closed-loop control system.
[description of drawings]
Fig. 1 is the schematic diagram of a kind of embodiment of wireless power supply system of the present invention;
Fig. 2 is the structured flowchart of wireless power supply system host node of the present invention;
Fig. 3 is the structured flowchart of wireless power supply system of the present invention from node;
Fig. 4 is the energy conversion efficiency of wireless power supply system of the present invention and the relational view of master and slave aerial coil energy attenuation rate
Fig. 5 is the flow chart of a kind of embodiment of wireless power method of the present invention.
[embodiment]
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Please refer to Fig. 1, wireless power supply system comprises host node (energy source of supply end), from node (energy supply destination end) and auxiliary node.Host node is converted to the electromagnetism field energy as the energy supplier with AC energy, and transmits energy by electromagnetic viscosimeter to the outside, from node as the energy requesting party, receive the electromagnetism field energy that transmits from host node from node, convert thereof into electric energy by electromagnetic resonance, and export to load.Host node, undertaken by radio communication from the collaborative work between the node.Auxiliary node also and host node, from carrying out radio communication between the node, be used for being provided for determining the useful information of supplicant node position to the Requested Party node at host node, when node connects.Respectively be under one the situation, at least one supplementary module to be set at host node, from node.Have under a plurality of situations at host node or from node, the Requested Party node can utilize other host node or from the information of node determine and supplicant node between position relation, just can save the auxiliary node that plays the role of positioning this moment.
As shown in Figure 2, host node comprises main control module, power driver module, main resonance loop 1, main oscillations adjustment module, host node antenna and main communication module.Power driver module is used to provide the generation electromagnetic viscosimeter required alternating current, main resonance loop 1 is used to produce electromagnetic viscosimeter, the main oscillations adjustment module is used to regulate the host node electromagnetic viscosimeter structure eigenfrequency of (comprising main resonance loop and host node antenna), the host node antenna is used to broadcast electromagnetic viscosimeter, main communication module and other node carry out radio communication, and main control module is used to control and coordinate the work of each several part in the host node.Wherein, power driver module comprises frequency generator, and main control module is delivered to frequency generator with frequency control signal, and power driver module generates the alternating current of corresponding frequencies according to the response results of frequency generator.Main resonance loop 1, main oscillations adjustment module, host node antenna and relevant control executing mechanism are formed host node vibration coupled structure.
As shown in Figure 3, comprise from the control module from node, from resonant tank 2, from the vibration adjustment module, power output module, from the node antenna with from communication module, be used to receive electromagnetic viscosimeter from the node antenna, be used to produce electromagnetic resonance from resonant tank 2, be used for regulating from the node electromagnetic viscosimeter structure eigenfrequency of (comprising) from the vibration adjustment module from resonant tank with from the node antenna, power output module is used for the electric energy of electromagnetic viscosimeter conversion is offered load, be used for carrying out radio communication from communication module, be used to control and coordinate from the work of intranodal each several part from the control module with other node.Wherein, from resonant tank 2, from the vibration adjustment module, form from node vibration coupled structure from node antenna and relevant control executing mechanism.
As a kind of improvement, the main control module in the host node also comprises response control unit and authenticating unit.Response control unit is used for when the request that receives from node, and the position in system according to our node and supplicant node judges whether our node is the host node that is in the optimum position of regulation.If the judgment is Yes, then respond this request and make our node enter the energy supply state, otherwise will not respond.Authenticating unit is used for judging whether supplicant node is the node of our node mandate when the request that receives from node, if the judgment is Yes, is then continued to handle by main control module, otherwise stops response, finishes to start.
When host node receives from effective request of node, by analysis request information, calculate under this request by its main control module, make the value of the relevant control parameter that reaches an optimization state of energy delivery between the master and slave node, and generation includes the control signal of aforementioned calculation value, running parameter to master and slave each module of node is regulated, thereby is satisfying from the optimization of the basis amount of the reaching supply of node energy demand.Basic control parameter comprises: the eigenfrequency of host node electromagnetic viscosimeter structure, and the frequency of the required alternating current that provides of host node, from the eigenfrequency of node electromagnetic viscosimeter structure, the angle of departure of host node antenna and from the acceptance angle of node antenna.
In the preferred embodiment, make the energy conversion effect reach best control value of consult volume and calculate according to following method:
At first, amplitude function, frequency response and the energy flow density function that can utilize Biot-Savart law, Maxwell equation group, Poynting theorem and law of conservation of energy analytical derivation electric current to vibrate to magnetic field, set up magnetic coupling model equation group, host node and the electric current variation in the node resoant antenna are linked together.Find the solution by conversion, rationally approximate, draw the principal and subordinate energy conversion efficiency equation of coupled structure: the P that vibrates
o/ P
i=η (f, ω
S, ω
D, d, t, Φ).Wherein, P
iThe input power of expression host node, P
oExpression is from the power output of node, and η represents energy conversion efficiency, and f represents the frequency of host node alternating current, ω
SThe eigenfrequency of expression host node electromagnetic viscosimeter structure, ω
DExpression is from the eigenfrequency of node electromagnetic viscosimeter structure, and (subscript S, D represent source end and destination end respectively, down together), d represented the distance (being the spacing of main and subordinate node resoant antenna) between the main and subordinate node, and Φ represents the azimuth between the main and subordinate node antenna.The value of d is determined according to the communication between the communication module of the master and slave node that carries out the energy transmission and other node that by main control module in the present embodiment, d adopts location algorithm to draw estimated value.Consider that there is bigger trueness error in computational process, for azimuth Φ, also can obtain an estimated value that is used to calculate according to location algorithm earlier.T is a time quantum, adopts feedback element as the control of main and subordinate node, and in the incipient stage, the waveform of energy conversion efficiency η may be in oscillatory regime, and when t arrival certain value, behind the system stability, it is constant that energy conversion efficiency η is tending towards.According to this energy conversion efficiency equation, calculate when energy conversion efficiency η reaches maximum control parameter f, ω
S, ω
DAnd the value of Φ.
Particularly, energy conversion efficiency η calculates, analytic process is as follows:
In the formula (1), Г
WFor cause the energy attenuation rate in the aerial coil, Г because of power output
SAnd Г
DBe respectively the intrinsic attenuation rate of master and slave node aerial coil;
Г
SAnd Г
DCalculating adopt formula
In the formula (2),
Wherein σ is the conductivity of winding wire, and a is a winding wire cross section radius, and l is the winding wire total length, and h is a coil height, and r is a coil radius, and n is a coil turn, and c is the light velocity, ε
0Be permittivity of vacuum, μ
0Be permeability of vacuum.
L is the inductance of aerial coil, and its size is determined by parameters such as σ, a, l, h, r and n.
κ is a coupling coefficient,
κ and the natural frequency ω of coupled system, the relevant note with resoant antenna spacing d of deflection Φ between the main and subordinate node antenna are made κ=f
κ(ω, φ, d).According to coupled mode theory,
2Ω
0＝2|κ
SD?|，κ
SD+κ
DS *＝0。Owing to used coupling mode equations in the theoretical derivation, native system is designed to require to satisfy by the perturbation coupling | κ
SD| ω
SAnd | κ
DS| ω
DCondition.
As calculated, formula (1) obtains peaked condition and is
See also Fig. 4, find by further analysis, when
The time η → 1, when
The time η=80%, therefore, the task of control system is exactly to regulate the height h of main and subordinate node aerial coil and deflection φ between the two, and the ω of principal and subordinate's oscillating circuit parameters such as (by regulating R, L, C), with assurance formula (6) establishment, and allows
Big as far as possible.
Handle according to above result of calculation, main control module generates the control signal that comprises above-mentioned parameter value information, removes to control each link parameter and makes it respectively adjust to the level of requirement.Host node and from the eigenfrequency ω of node
S, ω
DCan adopt extraordinary Mechatronic control system accurately to adjust, power driver module then provides the alternating current I (f) of the required characteristic frequency f of system resonance under control.To the adjustment of azimuth Φ by the host node antenna the angle of departure and realize from the regulation and control of the acceptance angle of node antenna.By regulating and controlling effect, make and get under the situation of these particular values energy conversion efficiency η near theoretical maximum at each parameter.
As further improvement, main control module also is provided with the demand judgement unit.The demand judgement unit is used to judge whether the power output from node when energy conversion efficiency is maximum satisfies the power output demand of supplicant node, be then by the master control module controls power transfer, otherwise send the message of refusal power supply or notify it to switch to the message of other host node to supplicant node.
As further improvement, power output module comprises the output monitoring means, main control module also comprises comparing unit, the output monitoring means sampling output signal of telecommunication, feed back the currency of its power output to host node according to sampled signal from node, output power value and currency when comparing unit is maximum with energy conversion efficiency compare, and main control module reaches predetermined requirement according to the control signal that result relatively adjusts its output until the result who makes comparison.Please refer to Fig. 3, among a kind of embodiment, dispose a plurality of host nodes (being power supply unit) at wireless power supply system, each host node can pass through wireless protocols (as ZigBee) networking each other, and mutual communication is understood position each other.Host node is not when receiving the energy request, and the power emission part will enter dormancy, and radio receiving transmitting module is in the listen mode of extremely low power dissipation.Need power supply when one from node, it at first broadcasts a power supply request, and a plurality of host nodes can receive request.The optimum position will carry out authentication to it together with this from node communication, authentication is calculated in real time its position (other nodes of this process need are assisted) by the back, the condition that calculating optimum energy conversion efficiency η takes place comprises f, ω
S, ω
D,, the value of Φ.Power output P when main control module is judged the energy conversion efficiency maximum that calculates earlier
OmaxCan satisfy requesting party's demand, if can, then according to result of calculation to issue from node needs be tuned to ω
D, the control signal of Φ, host node self is also according to f, ω
SValue adjust.From the voltage of node, to the real output P of host node feedback from node by output monitoring means monitoring one's own side power output end
o, compare with the calculated value of main control module, and utilize error amount adjustment, form the FEEDBACK CONTROL link.By the control parameter of the master and slave node of continuous regulating and controlling, make energy conversion efficiency reach the highest.Regulating and controlling is from start to finish carried out always, guarantees the high efficiency of transmission of energy.
If the energy conversion efficiency maximum that main control module calculates can not satisfy the demands, then notify from node and switch to other host nodes.The realization of this process can be used for reference the sub-district handover scheme of mobile phone in the GSM mobile communication.Also can adopt simpler method, promptly the Requested Party host node directly sends refusal power supply message, initiates broadcasting power supply request again after node receives refusal power supply message.Or under stable state, when from node detection to real output P
oLess than reservation threshold (requirements), then initiate broadcasting power supply request again.When master and slave node was out of touch, the host node parts work (power emission part and control section) of will stopping power supply was in listening state, will initiate broadcasting power supply request again from node.
Please refer to Fig. 5, the wireless power method of present embodiment is used for above-mentioned wireless power supply system, comprise from the node request of sending, host node and ask to judge and position judgment, if be effectively request, respectively control the value of parameter when then further the calculating energy conversion efficiency is maximum, and regulate and control the action parameter of master and slave node, thereby make the energy supply reach efficiency optimization from the node energy demand satisfying according to calculated value.By feedback element is set, adjust according to actual output from node, realize stabilizing effective closed-loop control.Execution mode can be with reference to the explanation of the operation principle of this wireless power supply system under preferred scheme more specifically.
Among the present invention, the control module of each master and slave node can adopt the embedded processing device to realize, comprise CPU, memory and input/output interface circuit, the communication module of each node can adopt the radio receiving transmitting module of 2.4GHz.In addition, host node and can adopt adjustable L loop aerial from node, antenna size can be different, and is less as the antenna size from node of mobile device.
Because will power consumption before wireless power takes place, about the method that initially powers on from node, two kinds of Scheme Choice can be arranged: 1, be among the present invention from the node configuration rechargeable battery from the node wireless communication module; 2, host node is in the broadcast type supply power mode all the time.Recommend to use first kind of scheme generally speaking.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (14)
1. wireless power supply system, comprise the host node of at least one energy supply and at least one be subjected to can from node, it is characterized in that:
Described host node comprises main control module, power driver module, the main resonance loop, the main oscillations adjustment module, host node antenna and main communication module, described power driver module is used to provide the generation electromagnetic viscosimeter required alternating current, described main resonance loop is used to produce electromagnetic viscosimeter, described host node antenna is used to broadcast electromagnetic viscosimeter, described main oscillations adjustment module is used to regulate the eigenfrequency of host node electromagnetic viscosimeter structure, described main communication module is used for carrying out radio communication with other node, and described main control module is used to control and coordinate the work of each several part in the described host node;
Described from node comprise from the control module, from resonant tank, from the vibration adjustment module, power output module, from the node antenna with from communication module, describedly be used to receive electromagnetic viscosimeter from the node antenna, describedly be used to produce electromagnetic resonance from resonant tank, describedly be used to regulate eigenfrequency from node electromagnetic viscosimeter structure from the vibration adjustment module, described power output module is used for the electric energy of electromagnetic viscosimeter conversion is offered load, describedly be used for carrying out radio communication, describedly be used to control and coordinate described work from the intranodal each several part from the control module with other node from communication module;
Respectively be under one the situation, also to comprise at least one auxiliary node at described host node with from node, described auxiliary node comprises the positioning and communicating module at least, is used for being provided for locating described information from node to described host node.
2. wireless power supply system as claimed in claim 1 is characterized in that:
Be under at least two the situation, also to comprise at least one auxiliary node at described host node and/or from node, described auxiliary node comprises the positioning and communicating module at least, is used for being provided for locating described information from node to described host node.
3. wireless power supply system as claimed in claim 1 is characterized in that:
Described main control module comprises response control unit, be used for when the request that receives from node, the position in system according to our node and supplicant node, judge whether our node is the host node that is in the optimum position of regulation, be then to respond this request to make our node enter the energy supply state, otherwise do not respond.
4. wireless power supply system as claimed in claim 3 is characterized in that:
Described main control module also comprises authenticating unit, is used for judging whether supplicant node is the node of our node mandate when the request that receives from node, is then to be continued to handle by described main control module, otherwise stops response.
5. as any described wireless power supply system of claim 1 to 4, it is characterized in that: described main control module is by analysing energy conversion efficiency relation: P
o/ P
i=η (f, ω
S, ω
D, d, Φ t), calculates as energy conversion efficiency P
o/ P
iWhen reaching maximum, parameter f, ω
S, ω
DAnd the value of Φ, P
iThe input power of expression host node, P
oExpression is from the power output of node, and η represents energy conversion efficiency, and f represents the frequency of the alternating current that power driver module provides, ω
SThe eigenfrequency of expression host node electromagnetic viscosimeter structure, ω
DExpression is from the eigenfrequency of node electromagnetic viscosimeter structure, d represents the distance between the main and subordinate node, Φ represents the azimuth between the master and slave node antenna, and d that is used to calculate and the value of Φ are obtained according to the location algorithm estimation according to the intercommunication mutually between the communication module of the master and slave node that carries out the energy transmission and other node by main control module; T is a time quantum, and the maximum of energy conversion efficiency does not rely on t under the system stability state;
Described main control module is regulated and control the eigenfrequency of described host node electromagnetic viscosimeter structure, the frequency of alternating current, the angle of departure of host node antenna according to described calculated value, and it is described from the control module by the communication notifications of described master and slave node communication module, regulate and control described from node electromagnetic viscosimeter structure eigenfrequency and from the acceptance angle of node antenna, described azimuthal adjustment realizes by the angle of departure of regulation and control host node antenna with from the acceptance angle of node antenna.
6. wireless power supply system as claimed in claim 5 is characterized in that:
Described main control module comprises the demand judgement unit, be used to judge whether the power output from node when energy conversion efficiency is maximum satisfies the power output demand of supplicant node, be then by the master control module controls power transfer, otherwise send the message of refusal power supply or notify it to switch to the message of other host node to supplicant node.
7. wireless power supply system as claimed in claim 5 is characterized in that:
Described power output module comprises the output monitoring means, described main control module comprises comparing unit, the described output monitoring means sampling output signal of telecommunication, the described currency that feeds back its power output from node according to described sampled signal to described host node, output power value and described currency when described comparing unit is maximum with energy conversion efficiency compare, described main control module reaches the requirement of expection according to the control signal that result relatively adjusts its output until the result who makes comparison.
8. a wireless power method is used for a kind of wireless power supply system, this system comprise the host node of at least one energy supply and at least one be subjected to can from node, and respectively be under one the situation at host node with from node, also comprise at least one auxiliary node, it is characterized in that, may further comprise the steps:
A, host node receive next energy supply request since node by radio communication, judge this position in the following manner: only have a host node and one under the situation of node in this system from node, host node receives locating information from auxiliary node by radio communication simultaneously, and carries out the position judgment of supplicant node in conjunction with this locating information; Have at least two host nodes and/or two under the situation of node in this system, host node is in conjunction with carrying out the position judgment of supplicant node with the radio communication of other master and slave node;
B, according to this request calculating optimum the control value of consult volume, it comprises: the eigenfrequency value of host node electromagnetic viscosimeter structure, the frequency values of the required alternating current that provides of host node, from the eigenfrequency value of node electromagnetic viscosimeter structure, the value of the angle of departure of host node antenna and from the value of the acceptance angle of node antenna; And generation includes the control signal of aforementioned calculation value;
C, the appropriate section in the above-mentioned control signal is sent to from node, controls master and slave node and carry out the adjustment of the state of each self-operating by the aforementioned calculation value by radio communication, until the state of actual motion with respect to the satisfied requirement of predesignating of aforementioned calculation value; Described operation comprises: host node transfers civil power or direct current high-frequency alternating current to and produces electromagnetic viscosimeter, the resonant tank of electromagnetic viscosimeter autonomous node reaches resonant tank from node via master and slave node antenna, the electromagnetism field energy that obtains is converted to AC energy and offers load by electromagnetic induction from node.
9. wireless power method as claimed in claim 8 is characterized in that:
In the described steps A, also comprise and judge this position from node in the following manner: this system has at least two host nodes and/or under the situation of node and at least one auxiliary node, and host node is in conjunction with carrying out the position judgment of supplicant node with the radio communication of other master and slave node and auxiliary node.
10. wireless power method as claimed in claim 8 is characterized in that:
In the described steps A, when the request that receives from node, the position in system according to our node and supplicant node is judged whether our node is the host node that is in the optimum position of regulation, is then to handle this request, otherwise will not be responded earlier.
11. wireless power method as claimed in claim 10 is characterized in that:
In the described steps A, when the request that receives from node, also authentication is carried out in the request from node, judge whether supplicant node is the node of our node mandate, is then to handle this request, otherwise will not respond.
12., it is characterized in that as any described wireless power method of claim 8 to 11:
Described step B comprises following substep:
B1, set up energy conversion efficiency equation: P
o/ P
i=η (f, ω
S, ω
D, d, Φ, t);
Wherein, P
iThe input power of expression host node, P
oExpression is from the power output of node, and η represents energy conversion efficiency, and f represents the frequency of host node alternating current, ω
SThe eigenfrequency of expression host node electromagnetic viscosimeter structure, ω
DExpression is from the eigenfrequency of node electromagnetic viscosimeter structure, d represents the distance between the main and subordinate node, Φ represents the azimuth between the master and slave node antenna, and d that is used to calculate and the value of Φ are obtained according to the communication estimation between the communication module of the master and slave node that carries out the energy transmission and other node by main control module; T is a time quantum, and the maximum of energy conversion efficiency does not rely on t under the system stability state;
B2, calculate when energy conversion efficiency η reaches maximum control parameter f, ω
S, ω
DAnd the value of Φ.
13. wireless power method as claimed in claim 12 is characterized in that:
Among the described step B, before the control value of consult volume of calculating optimum, judge when energy conversion efficiency is got maximum earlier, whether satisfy the power output demand of supplicant node from the power output of node, be then to enter next step, otherwise send the message of refusal power supply or notify it to switch to the message of other host node to supplicant node.
14. wireless power method as claimed in claim 12 is characterized in that:
Among the described step B, power output from node is monitored, feedback is from the currency of the power output of node, output power value when energy conversion efficiency is maximum and this currency compare, host node reaches predetermined requirement according to the control signal that result relatively adjusts its output until the result who makes comparison.
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| CN200810066765XA CN101330230B (en) | 2008-04-23 | 2008-04-23 | Wireless power supply system and method |
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|---|---|---|---|
| CN200810066765XA CN101330230B (en) | 2008-04-23 | 2008-04-23 | Wireless power supply system and method |
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| CN101330230A true CN101330230A (en) | 2008-12-24 |
| CN101330230B CN101330230B (en) | 2011-08-24 |
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| CN200810066765XA Expired - Fee Related CN101330230B (en) | 2008-04-23 | 2008-04-23 | Wireless power supply system and method |
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