CN110518704B - Authorized wireless power transmission method - Google Patents
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- CN110518704B CN110518704B CN201910666235.7A CN201910666235A CN110518704B CN 110518704 B CN110518704 B CN 110518704B CN 201910666235 A CN201910666235 A CN 201910666235A CN 110518704 B CN110518704 B CN 110518704B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
Abstract
The invention discloses an authorized wireless power transmission method, which relates to three aspects of wireless power transmission technology, system constitution and service protocol exchange, which are mutually supported and interdependent and are the core of the system; the invention has the authorization selection capability to the power receiving equipment without reducing the wireless power transmission capability and efficiency, and can effectively prevent the unauthorized equipment from acquiring the wireless power transmission service. Therefore, the electric energy required by the operation of the mobile terminal can be effectively supplemented at any time through the distributed wireless charging system in an authorized mode, and the dilemma that the self-contained storage battery of the mobile terminal has limited endurance is fundamentally solved. The invention is suitable for the existing induction type, magnetic resonance type and radio wave type wireless power transmission modes, and is also suitable for other possible modes of carrying out non-contact wireless power transmission on the receiving terminal by using alternating fields or waves. The invention relates to wireless power transmission in a wireless communication mode, and receiving equipment suitable for the invention comprises but is not limited to a mobile communication terminal or an Internet of things terminal.
Description
Technical Field
The invention relates to a power transmission method, in particular to an authorized wireless power transmission method.
Background
With the development of modern electronic information technology, the application of wireless mobile communication in various fields of people's daily life and national economy is increasingly popularized. However, while the functions, performances and application fields of wireless mobile terminals are continuously enhanced and expanded, the ubiquitous problem of insufficient cruising ability of a built-in battery has become a fatal defect affecting user experience.
It can be seen that in the modern rapidly-developing information-oriented society, mobile communication and wireless internet of things have become indispensable important components for maintaining social production and people's lives. Unfortunately, due to the limited capacity of the built-in battery of the mobile terminal, the user has to pay attention to the remaining power and charge the mobile communication terminal in time in order to maintain the normal use of the mobile communication terminal, or even has to purchase and carry a heavy mobile power storage charging device in order to avoid the accident that the power cannot be supplemented in time.
The contradiction between larger built-in battery capacity and miniaturization of mobile terminals becomes an obstacle difficult to break through in a short time, limited by the current development situation of energy storage density of storage batteries. Moreover, the configuration of the high-capacity and high-energy-storage-density battery and the necessity of performing frequent charging operations on the mobile terminal can bring about safety hazards which cannot be ignored. Meanwhile, the embarrassment of the endurance of the built-in battery of the rapidly developed wearable mobile terminal is more prominent due to the limitation of volume and weight, and thus the user experience is seriously damaged. Despite continuous and diligent efforts by mobile terminal manufacturers and battery manufacturers in terms of low power consumption chips, power saving operation management, low power consumption displays, high density batteries, etc., the persistent anxiety brought to users by the problem of endurance of mobile terminals cannot be fundamentally changed. Moreover, according to the current development progress of battery technology, the battery capacity per unit volume and weight is difficult to realize the fundamental breakthrough expected by the intelligent mobile terminal user for a foreseeable considerable period of time. In the modern information society where the social production and daily life are increasingly dependent on and deeply converged with mobile communication, the interruption of communication caused by the exhaustion of electric power of a mobile communication terminal often causes significant troubles to the normal work and life of people, and even causes irreparable loss of lives and properties in some cases.
Under the condition of limited battery endurance, the wireless mode is continuously, effectively and reliably realized, electric energy or electric energy supplement is timely provided for the mobile communication terminal and the Internet of things terminal, and the method has an attractive force and an important application prospect for promoting the development of the application of the mobile communication technology.
As early as 1890, nigula tesla proposed a concept of a wireless power transmission system and attempted experimental verification. But for a variety of reasons tesla's assumption eventually became submerged in historical long rivers. Of course, wireless transmission of tesla involves power transmission rather than wireless transmission of mobile terminals today. With respect to tesla wireless power transmission systems, people are currently mainly focused on the technical field of wireless power transmission to terminal devices, and these application terminals include but are not limited to: the system comprises a long-stagnation air vehicle, a motor vehicle, a remote control platform, a civil electric appliance, a mobile communication terminal, an Internet of things terminal, wearable mobile equipment, implantable medical equipment, detection equipment and the like. Among them, wireless power transmission of mobile communication terminals has more prominent market potential and more urgent application requirements than other systems.
Compared with an electromagnetic wireless charging mode, under the condition of considering the power consumption capacity and the portable miniaturization of the current high-end intelligent mobile communication terminal, the power obtained by the photovoltaic charging and space dispersion electromagnetic radiation charging technology cannot meet the required capacity level.
Currently, wireless charging can be divided into according to the adopted technical principle: three technical schemes of electromagnetic induction, magnetic field resonance and radio waves are shown in figure 1. To date, different technical and application-oriented technical standards have emerged, and the mainstream wireless charging standards thereof include: five of Qi standard, PMA standard, A4WP standard, iNPOFi standard and Wi-Po standard. Compared with the remote high-power wireless power transmission proposed by Tesla, the technology which is actually applied at present is a close-range mode firstly. In recent years, people are focusing on a medium-distance wireless charging mode, which is very important for improving the convenience of wireless power transmission and provides favorable conditions for forming a wireless charging service market. With the development of mobile communication and internet of things 4G and 5G, especially the increasing number of users, the base stations and indoor distribution number in dense service areas reach a considerable scale, so that the co-location operation of the wireless power transmission base stations and the mobile communication and internet of things base stations becomes possible, and the method is very beneficial to effectively reducing the investment of system infrastructure.
The charging modes or standards have respective characteristics, application fields, technical maturity and market scale. Obviously, all the above technologies and products do not have a direct selection function for the powered device, that is, cannot prevent an unauthorized user from obtaining the wireless charging service. If an effective solution is designed on the system level without combining the technical scheme, the popularization and the application of the wireless power transmission technology are directly hindered, namely, the cruising bottleneck of the mobile communication terminal cannot be fundamentally twisted in the foreseeable future.
In recent years, a service system of paying for wired charging and leasing a mobile electric storage charging apparatus has appeared, but improvement of the problem and improvement of convenience thereof are limited.
Obviously, establishing widely distributed wireless power transmission coverage is an effective way to solve the problem of power source endurance of the mobile communication terminal. However, due to the inexorable and unavoidable current situation of the prior art for obtaining the wireless charging service for the unauthorized user, the economic benefit of the service provider cannot be effectively guaranteed, so that the application market is difficult to form. Therefore, it is necessary to integrate the wireless power transmission technical scheme, the network protocol, the wireless power transmission technical parameters and the like, and the system plans the wireless power transmission service system, so that the use of the wireless power transmission service by unauthorized users can be effectively avoided or basically limited while the higher wireless power transmission efficiency of the mobile equipment is realized.
Authorization of Mobile communication terminal to Wireless charging System base requirement
The performance and functionality required to authorize a wireless power transmission system can be summarized as follows:
(1) the existing wireless power transmission technologies including electromagnetic induction, magnetic field resonance and radio waves can be compatible to the maximum extent;
(2) the system has reasonable wireless power transmission efficiency;
(3) the system has the selection capability of the power receiving terminal, namely only a paying or contract authorized user can obtain normal wireless power transmission service, and an unauthorized user cannot obtain the normal wireless power transmission service;
(4) if the mobile communication terminal is not authorized and the receiving system is compatible with the wireless power transmission system, the mobile communication terminal cannot effectively obtain wireless power transmission electric energy by adopting the existing and foreseeable technologies;
(5) the equipment developed for obtaining the electric energy of the system under the unauthorized condition reaches the unacceptable level in the aspects of volume, complexity and cost;
(6) data exchange required between the wireless power transmission transmitting terminal and the power receiving terminal is fully compatible with the existing communication link;
(7) the mobile communication terminal power transmission receiving circuit corresponding to the system has the performance and characteristics of high efficiency, small volume and simple structure;
(8) the wireless power transmission transmitting terminal is provided with a transmitting efficiency control mechanism such as load feedback, power control and the like;
(9) the system has the real-time monitoring function of the power transmission state in the wireless power transmission coverage range and the power state acquired by the power receiving terminal;
(10) the system has a processing strategy for dealing with various abnormal states which can occur in operation.
Disclosure of Invention
The invention provides an authorized wireless power transmission method aiming at the defects of the prior art.
The invention discloses an authorized wireless power transmission method, which specifically comprises the following steps:
the method comprises the following steps: the wireless power transmission adopts a plurality of mutually adjacent alternating current frequencies to transmit power in groups; the relative frequency difference of the adjacent alternating current frequencies is less than 1 percent;
step two: the wireless power transmission is characterized in that a frame is formed by grouping alternating current frequencies for a certain time, alternating current electric energy is sequentially transmitted by repeated or non-repeated frames, each frame comprises a frame start and a power transmission load, and a frame gap is reserved between frames; the start of frame is used for receiver calibration keying delay, a plurality of phase shift keying is arranged in the frame load, and the keying phase of all alternating current frequency wave modes or a certain alternating current frequency wave mode is given at the keying point; wherein the relative frequency difference of the multiple alternating current frequencies is less than 1% and is close to inverse phase at the keying point; the approaching reverse direction is phi, 5/6 pi is more than phi and less than 7/6 pi;
step three: before transmitting the alternating current wave group, the wireless power transmission transmitting terminal transmits a keying key containing a frame keying parameter to an authorized user through a wireless or wired network; wherein the keying parameters include: alternating current frequency, frame start and frame duration, key control point and each frequency phase of the key control point;
step four: the wireless power transmission transmitting terminal transmits alternating current wave groups which are repeated according to frames and keying parameters or are transmitted according to the sequence of the frame keying parameters;
step five: the mobile communication terminal or other links obtain the wireless charging time or electric quantity authorization by adopting a payment or protocol mode, send a request to the wireless power transmission transmitting terminal through a wireless or wired network, and the transmitter returns a keying key which is similar to a communication mask code and contains a frame keying parameter in a key form after confirmation and transmits an alternating current transmission wave to the mobile receiving terminal; the key is generated by the wireless power transmission transmitting terminal according to a strategy; the total electric quantity transmitted is measured and combined by a transmitter and a receiving end; the transmitter receives the key of the group of transmitted waves replaced after the authorized user reaches the authorized measurement, the user cannot continue to receive the electric energy, transmits the changed key to the user still using the group of wireless power transmission frequency, and transmits power according to the changed key so as to enable the user to continue to normally obtain the electric energy; authorizing a mobile communication terminal or other power receiving terminals to feed back received electric energy measurement to a transmitting terminal in real time while receiving electric energy; when the transmitter judges that the authorized user is in a state of not normally receiving the wireless power transmission by combining the detection point and the user response, the power transmission to the user is stopped, and the user is notified through a wireless or wired network.
Preferably, the power transmission transmitting module and the antenna need to be configured for each frequency point independently, so that effective multi-frequency space radiation is realized.
Preferably, the wireless power transmission transmitting terminal comprises a transmitter and the distributed power transmission monitor judges the wireless power transmission response state in real time and transmits data to the transmitter through a wired or wireless network.
Preferably, the mobile communication terminal or other link is authorized to automatically or manually make a request to the wireless power transmission terminal.
Preferably, the wireless power transmitting terminal should be co-located with the mobile communication device.
Preferably, the wireless power transmission transmitting terminal power supply mode includes an induction type, a magnetic resonance type and a radio wave type, and the receiving terminal is subjected to non-contact wireless power transmission by using an alternating field or wave.
Wireless power transmission can be classified into low-power wireless power transmission and high-power wireless power transmission according to the transmitted power capacity. The invention relates to a non-contact low-power transmission technical scheme in a wireless communication mode, which is suitable for receiving equipment of the invention, including but not limited to a mobile communication terminal or an Internet of things terminal.
The invention has the authorization selection capability to the power receiving equipment without reducing the wireless power transmission capability and efficiency, and can effectively prevent the unauthorized equipment from acquiring the wireless power transmission service. Therefore, the electric energy required by the operation of the mobile terminal can be effectively supplemented at any time through the distributed wireless charging system in an authorized mode, and the dilemma that the self-contained storage battery of the mobile terminal has limited endurance is fundamentally solved.
The invention relates to three main aspects of wireless power transmission technology, system constitution and service protocol exchange, which are mutually supported and interdependent and form the core of the system. Existing or any other wireless charging technology utilizing alternating magnetic fields, alternating electromagnetic fields and radio frequency electromagnetic wave mechanisms can be adapted for use in the system of the present invention.
Drawings
Fig. 1 illustrates three main ways of wireless charging or power transmission;
FIG. 2 is a dual frequency AC waveform and its resultant response;
FIG. 3 is a dual frequency AC waveform with phase-initiated keying added and its resultant response;
fig. 4 is a wireless power transmission frame structure;
FIG. 5 is a dual frequency wireless AC transmission waveform with phase shift keying;
fig. 6 authorizes a wireless power transmission system;
FIG. 7 is a multi-frequency phase-keyed AC transmitter;
fig. 8 is a block diagram of an ac splitting circuit.
Detailed Description
The technical principle of the invention is as follows:
(1) method for realizing composite amplitude control by dual-frequency or multi-frequency phase keying
Taking dual-frequency wireless power transmission as an example, as shown in FIG. 2, wherein f1And f2The frequencies of the two alternating current waves, A (f)1) And A (f)2) The waveforms, A (f), being two AC waves, respectively1)+A(f2) Is the waveform of the composite wave. If the two AC waveforms are phase-inverted at the start timeI.e. the phase difference is pi, the envelope amplitude of the composite wave will increase from 0, the maximum amplitude of the composite wave is the sum of the amplitudes of the two AC waveforms, and the envelope period T is f1And f2The reciprocal of the difference, the maximum of which occurs at a phase difference of 0 between the two waveforms. At f1And f2The phase difference is at pi/6, and the envelope amplitude of the resultant wave is f1And f2Half of the sum of amplitudes.
It can be seen that at f1And f2The phase difference is in the interval from pi to far less than pi/6, i.e. the time interval is from 0 to far less than T/12, the amplitude of the synthesized AC waveform is far less than f1And f2Sum of amplitudes.
Therefore, if the phase of the two waveforms is always in the interval from pi to much less than pi/6 by using the phase shift keying, the amplitude of the synthesized waveform can be always controlled to be a small level, as shown in fig. 3. If not, A (f)1) And A (f)2) The energy obtained by direct detection of the composite wave is very limited for effective separation.
(2) Dual or multi-frequency AC frequency selection
The present invention requires that the dual or multi-frequency wireless transmission ac frequency spacing be sufficiently small, in which case, although the spatial spectrum energy of each frequency exists, due to the close enough frequency proximity, an unauthorized user cannot effectively separate the dual or multi-frequency ac waveforms with limited size, technology and cost, and can only obtain a low amplitude composite waveform (as shown in fig. 2). While the composite waveform will always be maintained at a lower level (as shown in fig. 3) due to the presence of phase shift keying. Therefore, if the key is not known, the electric energy obtained by synthesizing the waveform will not be enough to offset the inherent loss of the receiving circuit, and the wireless transmission electric energy cannot be successfully obtained.
Accordingly, the present invention requires that the relative frequency difference of the dual-frequency or multi-frequency wireless power transmission to the alternating current frequency is less than 1% in consideration of the size of the mobile terminal, the existing and future devices and the technical level.
To further increase the technical barrier to obtaining power transmission services for potential unauthorized users, groups of frequency points may be preset and frequency hopping techniques utilized.
The scheme of the invention is compatible with the existing wireless charging technology and other possible alternating current wireless charging technologies.
(3) Wireless power transmission transmit frame formation
The wireless power transmission is characterized in that frames are formed by double-frequency or multi-frequency alternating current waves with preset time duration, alternating current electric energy is sequentially transmitted by repeated or non-repeated frames, each frame comprises a frame start and a power transmission load, and a frame gap is reserved between frames. The start of frame is used by the receiver to calibrate local key delays, and a plurality of phase shift keys are provided within the frame payload, with the keying phase of all or some of the ac frequency waveforms being given at the keying point. The point is that the multiple ac frequencies are close enough together and close to anti-phase at the key point. As shown in fig. 4, 1 is a sequence of transmission frames, 2 is a frame body, 3 is a frame start, 4 is a frame load, 5-1 to 5-n are key points, and 6 is a frame gap.
For dual-frequency wireless power transmission and phase inversion at the key point, the wireless ac transmission frame waveform employed in the present invention is shown in fig. 5. Wherein 1 is a double-frequency wireless power transmission wave form, 2 is a power transmission frame load, and 3-1 to 3-n are phase shift keying points.
For simplicity of the system, several finite fixed phases are chosen at the keying point in this interval to facilitate reducing the circuit complexity of the transceiver device. The use of multiple key points can substantially increase the complexity of unauthorized receiving devices, increasing their cost-effectiveness to an undesirable level.
(4) System configuration
As shown in fig. 6, the user obtains the authorization key in a wireless or wired manner and controls the user terminal to obtain wireless power by using the frequency and phase keying information provided in the authorization key. Wherein, 1 and 2 are induction (or magnetic resonance) and radio frequency wireless power transmission transmitting terminals respectively, 3 is a mobile communication terminal, 4 is a mobile communication base station, 5 is data exchange between the wireless power transmission transmitting terminal and the mobile communication base station, 6 is data exchange between the mobile communication base station and the mobile communication terminal, and 7 is a wireless power transmission monitor.
(5) Transmission circuit block diagram
Needless to say, in order to implement the dual-frequency or multi-frequency phase-keying ac transmission scheme of the present invention, a separate transmitter and antenna are used for each frequency, and there is a sufficient spatial distance between the transmitting antennas, otherwise, due to the cancellation effect of the close frequencies in the circuit, the effective power radiation spectrum of each frequency point cannot be obtained in space, as shown in fig. 7, where: 1-host computer for realizing data exchange with system center, including user access management, key generation, frequency generation and phase keying; 2-a transmitter set; 3-transmitting antenna or radiating coil set.
(4) Authorized wireless power transmission receiving circuit block diagram
In mobile terminals, the receiving coil or antenna needs to have a sufficiently small internal resistance for all frequencies to avoid mode variations due to nonlinear pulling effects in the receiving circuit.
The manner in which the authorized user obtains ac power is shown in fig. 8. Wherein, 1 is a receiving antenna or an induction coil; 3 (f)1) And 3 (f)2) Are respectively f1And f2The local phase-keying signaler of (a); 2 is an AC signal splitter with phase shift keying AC signal generator waveform 3 (f)1) And 3 (f)2)) Separating a corresponding frequency alternating current signal from a wireless power transmission signal received by an induction coil or an antenna by utilizing a correlation principle as a reference signal; 4 (f)1) And 4 (f)2) Respectively, separate ac signal outputs.
The separated AC 4 (f) thus obtained1) And 4 (f)2) Then used to power the terminal device or charge the battery via the respective rectifying and filtering circuit.
Core content of the invention
(1) The wireless power transmission system is composed of a wireless power transmission transmitting terminal, a mobile receiving terminal and a monitor, as shown in fig. 6.
(2) Wireless power transmission uses a plurality of ac frequencies in close proximity to each other to transmit power in a group, as shown in fig. 2.
(3) The wireless power transmission is framed in groups of ac frequencies over a period of time, each frame comprising two main parts, frame start and power transmission load, as shown at 2 in figure 4.
(4) A plurality of phase keying points are given within the frame power payload to ensure that the inter-frequency phases within the frame are always in a near-inverted state, as shown in figures 3 and 5.
(5) The key point selection is set in the interval of 0 to less than pi/6 according to the phase difference between the ac waveforms, as shown in fig. 2 and 3.
(6) The wireless power transmission transmitting terminal transmits the alternating current wave groups repeatedly according to frames and keying parameters or sequentially according to the frame keying parameters, as shown in 1 in figure 4.
(6) Before transmitting the alternating current wave group, the wireless power transmission transmitting terminal transmits a keying key containing a frame keying parameter to an authorized user through a wireless or wired network. The keying parameters mainly include: AC frequency, frame start and frame duration, key control point and phase of each frequency at the key control point.
(7) The authorized user obtains the key via mobile communication or other link and controls the receiving circuit accordingly to achieve power acquisition as shown at 6 in fig. 8.
(8) In order to realize effective multi-frequency space radiation, the power transmission transmitting module and the antenna need to be configured for each frequency point separately, and the antenna or the coil needs to have enough space intervals, as shown in fig. 7.
(9) The mobile communication terminal obtains the wireless charging time or electric quantity authorization by adopting a payment or protocol mode, sends a request to the wireless power transmission transmitting equipment through a wireless or wired network, returns frame information which is similar to a communication mask and contains frequency and keying information in a key mode after the transmitting end confirms, and transmits alternating current transmission waves to the mobile receiving end. The secret key is generated by the wireless power transmission transmitting terminal according to the strategy.
(10) The total amount of power delivered is performed in a combination of transmit side estimation and receive side metering. And the transmitting end receives the key of the group of transmitted waves after the authorized user reaches the authorized measurement, the user cannot continue to receive the electric energy, transmits the changed key to the user still using the group of wireless power transmission frequency, and transmits power according to the changed key so as to enable the user to continue to normally obtain the electric energy.
(11) The transmitting end of the wireless power transmission system comprises transmitters (1 and 2 in figure 6) and a distributed power transmission monitor (7 in figure 6), wherein a receiving circuit of the monitor is similar to a receiving circuit of a mobile user, and the monitor judges the wireless power transmission response state in real time and transmits data to the transmitters through a wired or wireless network.
(12) And authorizing the mobile terminal user to feed back the received electric energy measurement to the transmitting equipment in real time while receiving the electric energy. When the transmitting device judges that the authorized user is in the state of not normally receiving wireless power transmission by combining the detection point and the user response, the transmitting device stops transmitting power to the user according to the (10) strategy and informs the user through a wireless or wired network. The authorized user may automatically or manually reissue the request to the wireless power transmitting device as needed.
(13) And (3) when the wireless power transmission of the long authorized user is carried out, stopping the wireless power transmission service for the user according to the (10) strategy when the total effective power transmission reaches the authorized time.
(14) The wireless power transmission transmitting equipment and the mobile communication equipment are co-located, and utilization rate of power supply facilities and occupied sites is reduced.
(15) The invention is suitable for the existing induction type, magnetic resonance type and radio wave type wireless power transmission modes, and is also suitable for other possible modes of carrying out non-contact wireless power transmission on the receiving terminal by using alternating fields or waves. The invention relates to wireless power transmission in a wireless communication mode, and receiving equipment applicable to the invention comprises but is not limited to a mobile communication terminal or an Internet of things terminal.
Claims (6)
1. An authorized wireless power transmission method is characterized by specifically comprising the following steps:
the method comprises the following steps: the wireless power transmission adopts a plurality of mutually adjacent alternating current frequencies to transmit power in groups; the relative frequency difference of the adjacent alternating current frequencies is less than 1 percent;
step two: the wireless power transmission is characterized in that a frame is formed by grouping alternating current frequencies for a certain time, alternating current electric energy is sequentially transmitted by repeated or non-repeated frames, each frame comprises a frame start and a power transmission load, and a frame gap is reserved between frames; the start of frame is used for receiver calibration keying delay, a plurality of phase shift keying is arranged in the frame load, and the keying phase of all alternating current frequency wave modes or a certain alternating current frequency wave mode is given at the keying point; wherein the relative frequency difference of the multiple alternating current frequencies is less than 1% and is close to inverse phase at the keying point; the approaching inversion is that the potential difference is phi, 5/6 pi is more than phi and less than 7/6 pi;
step three: before transmitting the alternating current wave group, the wireless power transmission transmitting terminal transmits a keying key containing a frame keying parameter to an authorized user through a wireless or wired network; wherein the keying parameters include: alternating current frequency, frame start and frame duration, key control point and each frequency phase of the key control point; the wireless power transmission transmitting terminal comprises a transmitter and a distributed power transmission monitor;
step four: the wireless power transmission transmitting terminal transmits alternating current wave groups which are repeated according to frames and keying parameters or are transmitted according to the sequence of the frame keying parameters;
step five: the mobile communication terminal or other links obtain the wireless charging time or electric quantity authorization by adopting a payment or protocol mode, send a request to the wireless power transmission transmitting terminal through a wireless or wired network, and the transmitter returns a keying key which is similar to a communication mask code and contains a frame keying parameter in a key form after confirmation and transmits an alternating current transmission wave to the mobile receiving terminal; the key is generated by the wireless power transmission transmitting terminal according to a strategy; the total electric quantity transmitted is measured and combined by a transmitter and a receiving terminal; the transmitter receives the key of the group of transmitted waves replaced after the authorized user reaches the authorized measurement, the user cannot continue to receive the electric energy, transmits the changed key to the user still using the group of wireless power transmission frequency, and transmits power according to the changed key so as to enable the user to continue to normally obtain the electric energy; authorizing a mobile communication terminal or other power receiving terminals to feed back received electric energy measurement to a transmitting terminal in real time while receiving electric energy; when the transmitter judges that the authorized user is in a state of not normally receiving the wireless power transmission by combining the detection point and the user response, the power transmission to the user is stopped, and the user is notified through a wireless or wired network.
2. The method of claim 1, wherein: the transmitter and the antenna need to be configured for each frequency point independently, so that effective multi-frequency space radiation is realized.
3. The method of claim 1, wherein: the wireless power transmission transmitting terminal judges the wireless power transmission response state in real time through the distributed power transmission monitor and transmits data to the transmitter through a wired or wireless network.
4. The method of claim 1, wherein: the mobile communication terminal or other link is authorized to automatically or manually send a request to the wireless power transmission transmitting terminal.
5. The method of claim 1, wherein: the wireless power transmission transmitting terminal should be co-located with the mobile communication device.
6. The method of claim 1, wherein: the power supply mode of the wireless power transmission transmitting end comprises an induction type, a magnetic resonance type and a wireless wave type, and non-contact wireless power transmission is carried out on the receiving terminal through an alternating field or wave.
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| CN1930822A (en) * | 2004-02-19 | 2007-03-14 | 日本电气株式会社 | Unauthorized wireless station detecting system, apparatus used therein, and method therefor |
| US7724717B2 (en) * | 2005-07-22 | 2010-05-25 | Sri International | Method and apparatus for wireless network security |
| KR101221049B1 (en) * | 2010-12-30 | 2013-01-21 | 전자부품연구원 | Charging method of multi-node wireless charging system using magnetic field communication |
| CN104467998A (en) * | 2014-10-17 | 2015-03-25 | 南京航空航天大学 | Energy capture cognitive radio communication method based on transmission after listening |
| CN104617680A (en) * | 2015-01-20 | 2015-05-13 | 天津大学 | Energy encrypting based magnetic resonance coupling type wireless charging system |
| ES2940232T3 (en) * | 2015-09-25 | 2023-05-04 | Ericsson Telefon Ab L M | Methods that provide UL grants that include time-domain configuration |
| TWI659624B (en) * | 2017-08-10 | 2019-05-11 | 巽晨國際股份有限公司 | Millimeter wave repeater, millimeter wave transmission system, and millimeter wave transmission method |
| CN108808869A (en) * | 2018-06-08 | 2018-11-13 | 深圳市汇森无线传输有限公司 | A kind of signal processing method of wireless charging system, receiving terminal and storage medium |
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2019
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