CN112422158A - System, method and equipment for transmitting and receiving energy-carrying wireless message - Google Patents
System, method and equipment for transmitting and receiving energy-carrying wireless message Download PDFInfo
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Abstract
The application belongs to the field of wireless charging, and provides a transmitting and receiving system, a method and equipment for energy-carrying wireless messages, wherein the method comprises the following steps: determining a resonant frequency of a coupling coil used for magnetic resonance of the transmit signal; generating a carrier wave for modulation according to the resonance frequency; modulating information to be transmitted according to the generated carrier to obtain a modulated signal; the modulated signal is converted to an analog signal to cause a coupling coil of the magnetic resonance to transmit the analog signal. Because the signal and energy to be transmitted are modulated by taking the resonant frequency as a carrier wave, a power amplifier is not needed, the system framework is simplified, the frequency offset and the signal deformation can be reduced, and the decoding accuracy is improved.
Description
Technical Field
The present application relates to the field of wireless charging, and in particular, to a system, a method, and a device for transmitting and receiving an energy-carrying wireless message.
Background
The portable wireless charging technology is a novel wireless communication and magnetic resonance coupling wireless charging fusion technology. The energy signal can be transmitted to the wireless signal receiving device at the same time of transmitting the wireless information to the wireless signal receiving device. The wireless signal receiving equipment obtains the energy in the communication signal through the conversion circuit according to the received energy signal.
The transmission of the current energy-carrying wireless message generally comprises a separated mechanism energy-carrying signal transmission and a combined mechanism energy-carrying signal transmission. In the comprehensive mechanism, a modulation technology in wireless communication is adopted, so that energy transmission and information transmission share one channel. However, since the coupling coil has a fixed resonant frequency, the modulated signal suffers from the impedance problem caused by mutual inductance between the coupling coils, so that the signal received by the receiving device is easily deformed, and the signal cannot be correctly intercepted in the filtering process due to frequency deviation or signal deformation, which results in decoding errors.
Disclosure of Invention
In view of this, embodiments of the present application provide a system and a method for transmitting and receiving a wireless message, so as to solve the problem in the prior art that, because a coupling coil has a fixed resonant frequency, a modulated signal is subject to an impedance problem caused by mutual inductance between the coupling coils, so that a signal received by a receiving device is easily deformed, frequency offset or signal deformation easily causes that a signal cannot be correctly intercepted in a filtering process, resulting in a decoding error.
A first aspect of the embodiments of the present application provides a wireless message-carrying transceiving system, the system includes a transmitting device and a receiving device, the transmitting device includes a resonant signal modulation module, a digital-to-analog converter and a transmitting coil, the receiving device includes a receiving coil, an analog-to-digital converter, a demodulation module and a rectification circuit, the transmitting coil and the receiving coil are magnetic resonance coupling coils, wherein,
the resonance signal modulation module is used for generating a carrier matched with the resonance frequency of the coupling coil and modulating information to be transmitted according to the carrier to obtain a modulated signal;
the digital-to-analog converter is used for converting the modulated signal into an analog signal and outputting the analog signal to the transmitting coil, and the transmitting coil is used for transmitting the analog signal to the receiving coil;
the receiving coil is used for receiving the analog signal and transmitting the analog signal to the analog-to-digital converter and the rectifying circuit at the same time, wherein the analog-to-digital converter converts the analog signal into a digital signal according to the resonance frequency of the resonance coil, and the received message is obtained through demodulation processing of the demodulation module; the rectifying circuit is used for rectifying the analog signal received by the receiving coil to obtain transmitted electric energy.
With reference to the first aspect, in a first possible implementation manner of the first aspect, a signal frame in the modulated signal includes an idle signal segment and a data segment, where the data segment is a time period in the signal frame that includes the information to be transmitted after being modulated by the carrier, and the idle signal segment is a time period in the signal frame that has no information.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the resonant signal modulation module is integrated with a phase-locked loop circuit and a digital controlled oscillator, and the resonant signal modulation module generates an internal clock signal through the phase-locked loop circuit, and adjusts a frequency control word or a phase control word in the digital controlled oscillator according to the internal clock signal and the information to be transmitted, so as to obtain the modulated signal.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the analog-to-digital converter is configured to sample the analog signal according to a preset sampling frequency to obtain a sampled signal; and according to a predetermined carrier frequency, the analog-to-digital converter determines a digital scalar corresponding to the sampling signal, and the digital scalar passes through a trained neural network classification model to obtain a digital signal corresponding to the digital scalar.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the neural network classification model adopted by the demodulation module is a support vector machine classification model, and when it is monitored that the system state is changed, according to the changed system state, the demodulation module retrains the neural network classification model by adopting a support vector machine algorithm.
With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the sampling frequency of the analog-to-digital converter is greater than the resonance frequency.
With reference to the first aspect, the first possible implementation manner of the first aspect, the second possible implementation manner of the first aspect, the third possible implementation manner of the first aspect, the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the resonant signal modulation module is a first FPGA chip, and the analog-to-digital converter is a second FPGA chip.
In a second aspect, an embodiment of the present application provides a method for sending an energy-carrying wireless message, where the method includes:
determining a resonant frequency of a coupling coil used for magnetic resonance of the transmit signal;
generating a carrier wave for modulation according to the resonance frequency;
modulating the message to be transmitted according to the generated carrier to obtain a modulated signal;
the modulated signal is converted to an analog signal for transmission by a transmit coil of a coupling coil of magnetic resonance.
With reference to the second aspect, in a first possible implementation manner of the second aspect, a signal frame in the modulated signal includes an idle signal segment and a data segment, where the data segment is a time period that includes the information to be transmitted after being modulated by the carrier in the signal frame, and the idle signal segment is a time period that has no information in the signal frame.
With reference to the second aspect, in a second possible implementation manner of the second aspect, modulating a message to be transmitted according to the generated carrier to obtain a modulated signal includes:
and generating an internal clock signal and information to be transmitted through a phase-locked loop, and adjusting a frequency control word or a phase control word in the integer controlled oscillator to obtain the modulated signal.
In a third aspect, an embodiment of the present application provides a method for receiving an energy-carrying wireless message, where the method includes:
receiving an analog signal by a receiving coil of a coupling coil of magnetic resonance;
converting the analog signal to a digital signal according to a predetermined carrier frequency, wherein the carrier frequency matches a resonant frequency of a coupling coil of the magnetic resonance;
demodulating the digital signal through a demodulation module to obtain received information;
and rectifying the received analog signal through a rectifying circuit to obtain transmitted electric energy.
With reference to the third aspect, in a first possible implementation manner of the third aspect, converting the analog signal into a digital signal according to a predetermined carrier frequency includes:
sampling the analog signal according to a preset sampling frequency to obtain a sampling signal, wherein the sampling frequency is greater than the resonance frequency;
determining a digital scalar corresponding to the sampling signal according to a predetermined carrier frequency;
and inputting the digital scalar into the trained neural network classification model to obtain a digital signal corresponding to the digital scalar.
A fourth aspect of embodiments of the present application provides a transmitting device capable of wireless message, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of the second aspect when executing the computer program.
A fifth aspect of embodiments of the present application provides a receiving device capable of wireless message, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of the third aspect when executing the computer program.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of the second or third aspects.
Compared with the prior art, the embodiment of the application has the advantages that: when the energy-carrying wireless message is generated, the information to be transmitted is modulated by selecting the carrier matched with the resonant frequency of the coupling coil to obtain a modulated signal, and correspondingly, when the receiving equipment receives the analog signal corresponding to the modulated signal, analog-to-digital conversion is carried out according to the resonant frequency to obtain a digital signal corresponding to the analog signal. Because the signal and energy to be transmitted are modulated by taking the resonance frequency of the coupling coil of the magnetic resonance as a carrier, the influence of the impedance problem caused by mutual inductance on the transmitted modulated signal is smaller, the frequency deviation and the signal deformation can be reduced, and the decoding accuracy can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1a is a schematic diagram of a deformed energy carrying signal;
FIG. 1b is a schematic diagram of a wireless messaging system according to an embodiment of the present application;
fig. 2 is an operation schematic diagram of a numerically controlled oscillator provided by an embodiment of the present application;
fig. 3 is a schematic structural diagram of a transmitting device provided in an embodiment of the present application;
fig. 4 is a schematic diagram of a demodulation structure of a receiving device according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a modulated signal provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of a support vector machine classification provided in an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a correspondence relationship between classification function calculation and a classification result provided in an embodiment of the present application;
FIG. 8 is a schematic diagram illustrating a support vector machine according to an embodiment of the present application;
fig. 9 is a schematic diagram of a method for transmitting an energy-carrying wireless message according to an embodiment of the present application;
fig. 10 is a schematic diagram of a receiving method of an energy-carrying wireless message according to an embodiment of the present application;
fig. 11 is a schematic diagram of a transmitting/receiving device capable of wireless message according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
The wireless charging technology is a novel energy supply mode, and the constraint that the traditional electric energy needs a cable is eliminated. According to the wireless charging technology, a certain frequency energy signal is loaded to a transmitting coil through a power amplifier to form energy-carrying electromagnetic waves, and the energy-carrying electromagnetic waves are transmitted to a receiving coil through media such as air, so that charged equipment obtains energy. The wireless communication mode and the wireless charging technology are integrated, and a technology which enables information and energy to be transmitted in parallel, namely an energy-carrying information transmission technology, is created.
The current wireless charging technology includes an electromagnetic induction type, a magnetic resonance coupling type and a microwave type. The magnetic resonance coupling mode is based on the resonance principle, electromagnetic waves with certain frequency are radiated outwards from the transmitting end, and the receiving end collects the radiated energy, so that energy transmission is realized. Radio waves are, among other things, carriers of energy and also carriers of information.
There are two general types of energy-carrying information transmission: the separated type mechanism can carry information transmission and the integrated type mechanism can carry information transmission. Wherein:
the energy-carrying information transmission technology of the separated mechanism comprises two different working frequencies which are respectively used for energy transmission and information transmission, and the working frequency for the energy transmission is higher than the working frequency for the information transmission. Since the two are operated separately and independently, the system includes coils for information transfer in addition to the coils for radiating and receiving energy. Because the two coils with different functions exist and mutual inductance exists between the coils, the impedance matching problem which is difficult to analyze originally is more complicated. In addition, two different operating frequencies are transmitted in an additive manner, and interfere with each other, so that the decoding accuracy of a receiving end or receiving equipment is easily introduced, and the overall energy conversion efficiency of the system is low.
Under the comprehensive mechanism, the energy transmission and the information transmission share the same high-frequency signal. The energy-carrying high-frequency signal is subjected to modulation processing to obtain an energy-carrying wireless message signal. The energy-carrying wireless message signal reaches the receiving coil through the medium, and the system starts energy conversion and information decoding at the same time. Because the coupling coil has certain resonant frequency, the modulated signal is subjected to the impedance problem caused by mutual inductance between the coupling coils, and the modulated signal passes through a power amplifier, space factors and other reasons, so that the signal at the receiving end is deformed to a certain extent, the frequency is deviated, the signal cannot be correctly intercepted in the filtering process, decoding errors are caused, and the influence is more serious under the communication of high bit rate. For example, in the diagram of the deformed energy carrying signal shown in fig. 1a, the amplitude of the energy carrying signal is significantly deformed.
Aiming at the defects of the two mechanisms of energy-carrying information signal transmission, the application provides the energy-carrying wireless message transmitting and receiving system, the transmitted message is modulated by the carrier matched with the resonant frequency of the generated coupling coil, for example, a modulation signal taking the resonant frequency as the center can be obtained, and the received signal is demodulated based on the carrier frequency, so that the influence of the resonant frequency on the signal deformation can be effectively reduced. And the demodulation can be carried out through neural network classification models such as a support vector machine, the influence of certain deformation of signals of a receiving end and frequency offset caused by a power amplifier, space factors and the like is reduced, and the system still has high decoding capability under high bit rate.
Fig. 1b is a schematic diagram of a wireless message-carrying transceiving system according to an embodiment of the present application, the system including: the system comprises a transmitting device and a receiving device, wherein the transmitting device comprises a resonance signal modulation module, a digital-to-analog converter and a transmitting coil, the receiving device comprises a receiving coil, an analog-to-digital converter, a demodulation module and a rectification circuit, the transmitting coil and the receiving coil are magnetic resonance coupling coils, wherein,
the resonance signal modulation module is used for generating a carrier matched with the resonance frequency of the coupling coil and modulating information to be transmitted according to the carrier to obtain a modulated signal;
the digital-to-analog converter is used for converting the modulated signal into an analog signal and outputting the analog signal to the transmitting coil, and the transmitting coil is used for transmitting the analog signal to the receiving coil;
the receiving coil is used for receiving the analog signal and transmitting the analog signal to the analog-to-digital converter and the rectifying circuit at the same time, wherein the analog-to-digital converter converts the analog signal into a digital signal according to the resonance frequency of the resonance coil, and the received message is obtained through demodulation processing of the demodulation module; the rectifying circuit is used for rectifying the analog signal received by the receiving coil to obtain transmitted electric energy.
The resonance signal modulation module can be used for generating a carrier wave for modulation, receiving information to be transmitted, and loading the received information to be transmitted to the carrier wave to obtain a modulated signal.
Since an FPGA (Field Programmable Gate Array is called in chinese and Field Programmable Gate Array is called in english) has rich input and output interfaces and rich kernel resources, the resonance signal modulation module can be integrated in the FPGA. In order to distinguish the FPGA in the receiving device, the FPGA in the transmitting device is called a first FPGA, and the FPGA in the receiving device is called a second FPGA. Of course, the module is not limited to FPGA, and the module may be other processors, such as ARM, DSP, etc.
When the resonance signal modulation module is integrated in the FPGA, the resonance signal modulation module can be generated by a core module numerically controlled oscillator (NCO for short). Fig. 2 is a schematic diagram of a digitally controlled oscillator, in which a clock signal Fclk may be generated by a phase-locked loop of a core in an FPGA, and a required clock frequency is obtained after N times of steps.
As shown in fig. 2, the frequency control word sends the received frequency control word to the phase accumulator, the phase accumulator counts the system clock, the phase is accumulated when the value of the input frequency control word is reached, then the accumulated value is sent to the phase adder, and is added to the initial phase received by the phase control word register to perform initial phase shift, so as to obtain the current phase to be output, and the current phase is sent to the amplitude P phase conversion circuit as the sampling address value, and the sine and cosine signal sample is obtained by looking up the table.
Therefore, the system only needs to change the frequency control word and/or the phase control word according to the coded data of the information to be transmitted, directly carries out frequency modulation or phase modulation, and generates a required modulated signal (sinusoidal signal), thereby greatly reducing the development period. The frequency formula of the modulated signal shown in fig. 2 is:
where Fout is the output frequency, Fc is the frequency control word, and M is the number of bits in the phase accumulator.
Because the resonant frequency of the system is a high-frequency signal, in order to ensure the smoothness and accuracy of signal output, when the digital-to-analog converter performs sampling, the sampling frequency should be greater than the output frequency of the transmitting device, i.e. the sampling frequency is greater than the resonant frequency. In a possible implementation, the sampling frequency may be a predetermined multiple of the resonant frequency, and the predetermined multiple is greater than 1, and usually more than 2 times, for example, 10 times may be selected. .
As shown in the schematic structural diagram of the transmitting device shown in fig. 3, an input/output pin of the FPGA may receive information to be transmitted, and a phase-locked loop (PLL) in a core of the FPGA may generate a carrier frequency consistent with a resonant frequency of the coupling coil by frequency multiplication. The frequency control word and/or the phase control word in the digital controlled oscillator is modulated by data in the information to be transmitted, so that a modulated signal carrying the wireless message is obtained. The modulated signal is converted to an analog signal by a high-speed digital-to-analog converter and transmitted via a transmitting coil.
The method and the device modulate the information to be transmitted, can adopt a modulation mode of FSK (frequency shift keying), generate a high-frequency sinusoidal signal with the same resonant frequency as a coupling coil in an FPGA (field programmable gate array) in a transmitting terminal as the central frequency of an energy-carrying signal, and output the high-frequency sinusoidal signal to a transmitting coil through a digital-to-analog converter.
As shown in fig. 4, which is a schematic diagram of a demodulation structure of a receiving device, at the receiving device side, an energy-carrying wireless message signal transmitted through a medium is received by a receiving coil, and is converted by an analog-to-digital converter into a data message that can be processed by a second FPGA. Because the energy carrying signal collected by the coupling coil of the receiving equipment is unbalanced alternating current, the alternating current can be converted into stable direct current through the full-wave rectification circuit.
The other branch connected with the coupled receiving coil is a signal sampling circuit. To ensure the accuracy of the signal sampling, the signal sampling frequency should be greater than the resonant frequency, which may be, for example, a predetermined multiple greater than 1 of the resonant frequency. And according to the resonance frequency, the data value of the sampling point can be obtained, and the data value of the sampling point is decoded through the demodulation module to obtain the received data message.
In a possible implementation manner of the present application, a signal frame of the modulated signal may include an idle signal segment and a data segment, where the information to be transmitted after carrier modulation is transmitted in the data segment, and the idle signal segment is a no-signal period that does not include a resonant frequency and transmission data. Because each signal frame includes an idle signal segment, when the signal frame is transmitted, the detected signal is suddenly changed to "0", and the receiving device can determine that the signal frame is received completely. As shown in the modulated signal diagram of fig. 5, when the system sample signal abruptly changes from "0", the receiving device can determine that the signal frame starts to be transmitted. Therefore, by setting the idle signal segment, the efficiency of wireless energy transmission is not affected, and the transmission of the signal is not affected, and it can be ensured that demodulation is started from the head of the data frame, which is beneficial to ensuring the accuracy of demodulation.
In order to simplify the system framework and improve the accuracy of the message demodulated by the system, in an implementation manner of the embodiment of the present application, the data signal obtained by sampling may be classified by a neural network classification model. For example, a Support Vector Machine (SVM) model may be used to perform generalized linear separation of two classes of data. By selecting the SVM model for classification, the accuracy of high-speed communication decoding in wireless best time can be effectively ensured, and the complex processes of filter design and signal operation of traditional demodulation are simplified.
When the support vector machine is used for classification, signals of sampling points can be converted into digital scalars according to carrier frequencies, and model training or calculation is performed by taking the digital scalars as features. When model training is carried out, sample data of a known label (1 or 0) can be used for modulation transmission, and when a module signal corresponding to the sample data is received, the sample data is input into a support vector machine for training according to a signal of a sampling point and the corresponding label.
Referring to fig. 6, which is a schematic diagram of the classification of the support vector machine provided in the embodiment of the present application, assuming that the features of two different signals (0 and 1) are on a two-dimensional plane and linearly separable, two types of data can be separated by a straight line, which is similar to a hyperplane, where a first side of the hyperplane represents the waveform of symbol 1 and a second side represents the waveform of symbol 0.
Assuming a digital scalar of the signal at the sample point of
Corresponding label is
The set D comprising n samples is:
where i represents the ith sample and n represents the sample size.
The problem solved by the support vector machine is to find the best hyperplane to separate the two. As shown in the schematic diagram of the correspondence between the classification function calculation and the classification result shown in fig. 7, sample data is substituted into the classification function:
computing parameters in classification functions
b, p. If it is
Then the data point corresponding to y-1 corresponds to tag 1, and vice versa the data point corresponding to y-1 corresponds to tag 0.
After the model is trained, sampling values are obtained according to sampling and are used as the input of the model, and whether the information carried by the signal is 0 or 1 can be judged.
In the embodiment of the present application, as shown in fig. 8, a schematic diagram of a support vector machine is used, and signal frames carrying wireless messages include a 0# frame and a 1# frame, where the 0# frame is an idle signal segment and the 1# frame represents a data segment. When analog-to-digital conversion is carried out through the support vector machine, the support vector machine can be trained through calibrated sample data, parameter values in the support vector machine are determined, and the corresponding relation between the trained support vector machine and system state parameters is established. Experiments prove that the accuracy of the energy-carrying wireless message transmission method adopted by the embodiment of the application can reach more than 95%.
When the state of the system changes, such as the change of the resonant frequency, the change of the modulation mode, the change of the data frame format or the change of the sampling frequency, the neural network classification model can be trained again according to the calibrated sample data, and the analog-to-digital conversion is carried out according to the trained model corresponding to the current system state. The adaptive capacity of the system under different states is improved.
In addition, in a possible implementation manner of the present application, a method for transmitting an energy-carrying wireless message shown in fig. 9 may also be included, as shown in fig. 9, the method includes:
s901, a resonant frequency of a coupling coil for magnetic resonance of a transmission signal is determined.
In the embodiment of the application, the resonant frequencies of the transmitting coil and the receiving coil are the same, and the set value input by the operator can be received according to the resonant frequency of the resonant coil (the transmitting coil and the receiving coil) selected by the system. Alternatively, the resonant frequency may be determined based on the magnitude of the signal received by the receiving device by transmitting a signal at a different frequency through the transmitting device.
And S902, generating a carrier wave for modulation according to the resonance frequency.
According to the size of the resonance frequency, a clock frequency can be generated through a phase-locked loop in an inner core of the FPGA to serve as a modulated carrier frequency.
S903, modulating the message to be transmitted according to the generated carrier to obtain a modulated signal;
the frequency of the output signal can be adjusted according to the data in the information to be transmitted by the frequency control word or the phase control word in the numerical control oscillator, so as to obtain the modulated signal of the information to be transmitted.
In a possible implementation manner, the modulated signal includes an idle time period and a data segment, the information to be transmitted after carrier modulation is transmitted in the data segment, and the idle signal segment is a no-signal time period that does not include the resonant frequency and the transmission data. Therefore, the starting position and the ending position of the data can be more accurately identified, and the accuracy of data demodulation is improved.
And S904, converting the modulated signal into an analog signal so as to enable a coupling coil of magnetic resonance to transmit the analog signal.
The carrier frequency is determined by the resonance frequency, so that when the modulated signal is transmitted, the frequency deviation and the signal deformation are reduced.
Corresponding to the transmission method diagram shown in fig. 9, fig. 10 provides a schematic diagram of a method for receiving an energy-carrying wireless message, including:
and S1001, receiving an analog signal through a coupling coil of magnetic resonance.
And S1002, converting the analog signal into a digital signal according to a predetermined carrier frequency, wherein the carrier frequency is matched with the resonant frequency of the coupling coil of the magnetic resonance.
The received analog signal is a signal modulated according to the resonance frequency, and therefore, the sampling value of the sampling point can be determined according to the resonance frequency.
In order to improve the accuracy of conversion, the analog signal can be sampled at a preset sampling frequency to obtain a sampling signal, wherein the sampling frequency is greater than the resonance frequency; determining a digital scalar corresponding to the sampling signal according to a predetermined carrier frequency; and inputting the digital scalar into the trained neural network classification model to obtain a digital signal corresponding to the digital scalar.
S1003, demodulating the digital signal through a demodulation module to obtain the received information.
And S1004, rectifying the received analog signal through a rectifying circuit to obtain transmitted electric energy.
The receiving method and the transmitting method of the energy-carrying wireless message shown in the embodiment of the present application correspond to the system for receiving and transmitting the energy-carrying wireless message shown in fig. 1.
In addition, the present application also provides a transmitting apparatus of an energy-carrying wireless message corresponding to the transmitting method of the energy-carrying wireless message, including:
a resonance frequency determination unit for determining a resonance frequency of a coupling coil for magnetic resonance of a transmission signal;
a carrier generation unit for generating a carrier for modulation according to the resonance frequency;
the modulation unit is used for modulating the message to be transmitted according to the generated carrier to obtain a modulated signal;
and the signal transmitting unit is used for converting the modulated signal into an analog signal so as to enable a coupling coil of magnetic resonance to transmit the analog signal.
And a receiving apparatus of the energy-carrying wireless message corresponding to the receiving method of the energy-carrying wireless message, including:
the signal receiving unit is used for receiving an analog signal through a coupling coil of magnetic resonance;
a conversion unit configured to convert the analog signal into a digital signal according to a predetermined carrier frequency, wherein the carrier frequency is matched with a resonant frequency of the coupling coil;
and the rectifying unit is used for rectifying the received analog signal through the rectifying circuit to obtain the transmitted electric energy.
Fig. 11 is a schematic diagram of a transmitting/receiving device capable of wireless message according to an embodiment of the present application. As shown in fig. 11, the wireless message-capable transmission/reception apparatus 11 of this embodiment includes: a processor 110, a memory 111 and a computer program 112 stored in said memory 111 and operable on said processor 110, such as a wireless message carrying transmission/reception program. The processor 110, when executing the computer program 112, implements the steps in the various wireless message capable transmission/reception method embodiments described above. Alternatively, the processor 110 implements the functions of the modules/units in the above-mentioned device embodiments when executing the computer program 112.
Illustratively, the computer program 112 may be partitioned into one or more modules/units that are stored in the memory 111 and executed by the processor 110 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions that describe the execution of the computer program 112 in the wireless message carrying transmitting/receiving device 11.
The wireless message-capable sending/receiving device may include, but is not limited to, a processor 110 and a memory 111. Those skilled in the art will appreciate that fig. 11 is merely an example of a wireless message-carrying transmitting/receiving device 11 and is not intended to be limiting of a wireless message-carrying transmitting/receiving device 11 and may include more or fewer components than shown, or some components in combination, or different components, e.g., the wireless message-carrying transmitting/receiving device may also include input-output devices, network access devices, buses, etc.
The Processor 110 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 111 may be an internal storage unit of the wireless message capable transmitting/receiving device 11, such as a hard disk or a memory of the wireless message capable transmitting/receiving device 11. The memory 111 may also be an external storage device of the wireless message transmitting/receiving device 11, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the wireless message transmitting/receiving device 11. Further, the memory 111 may also include both an internal storage unit and an external storage device of the wireless message-capable transmitting/receiving device 11. The memory 111 is used for storing the computer programs and other programs and data required by the wireless message-capable transmitting/receiving device. The memory 111 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (14)
1. A transmitting and receiving system capable of wireless message carrying is characterized in that the system comprises a transmitting device and a receiving device, the transmitting device comprises a resonance signal modulation module, a digital-to-analog converter and a transmitting coil, the receiving device comprises a receiving coil, an analog-to-digital converter, a demodulation module and a rectification circuit, the transmitting coil and the receiving coil are magnetic resonance coupling coils, wherein,
the resonance signal modulation module is used for generating a carrier matched with the resonance frequency of the coupling coil and modulating information to be transmitted according to the carrier to obtain a modulated signal;
the digital-to-analog converter is used for converting the modulated signal into an analog signal and outputting the analog signal to the transmitting coil, and the transmitting coil is used for transmitting the analog signal to the receiving coil;
the receiving coil is used for receiving the analog signal and transmitting the analog signal to the analog-to-digital converter and the rectifying circuit at the same time, wherein the analog-to-digital converter converts the analog signal into a digital signal according to the resonance frequency of the resonance coil, and the received message is obtained through demodulation processing of the demodulation module; the rectifying circuit is used for rectifying the analog signal received by the receiving coil to obtain transmitted electric energy.
2. The system according to claim 1, wherein the signal frame in the modulated signal comprises an idle signal segment and a data segment, the data segment is a time segment in the signal frame including the information to be transmitted after being modulated by the carrier, and the idle signal segment is a time segment in which there is no information in the signal frame.
3. The system according to claim 1, wherein the resonance signal modulation module is integrated with a phase-locked loop circuit and a digital controlled oscillator, and the resonance signal modulation module generates an internal clock signal through the phase-locked loop circuit, and adjusts a frequency control word or a phase control word in the digital controlled oscillator according to the internal clock signal and the information to be transmitted to obtain the modulated signal.
4. The system of claim 1, wherein the analog-to-digital converter is configured to sample the analog signal according to a preset sampling frequency to obtain a sampled signal; and according to a predetermined carrier frequency, the analog-to-digital converter determines a digital scalar corresponding to the sampling signal, and the digital scalar passes through a trained neural network classification model to obtain a digital signal corresponding to the digital scalar.
5. The system of claim 4, wherein the neural network classification model adopted by the demodulation module is a support vector machine classification model, and when a system state is monitored to be changed, the demodulation module retrains the neural network classification model by adopting a support vector machine algorithm according to the changed system state.
6. The system of claim 4, wherein the sampling frequency of the analog-to-digital converter is greater than the resonant frequency.
7. The system according to any one of claims 1-6, wherein the resonant signal modulation module is a first FPGA chip and the analog-to-digital converter is a second FPGA chip.
8. A method for transmitting an energy-carrying wireless message, the method comprising:
determining a resonant frequency of a coupling coil used for magnetic resonance of the transmit signal;
generating a carrier wave for modulation according to the resonance frequency;
modulating the message to be transmitted according to the generated carrier to obtain a modulated signal;
the modulated signal is converted to an analog signal for transmission by a transmit coil of a coupling coil of magnetic resonance.
9. The method according to claim 8, wherein the signal frame in the modulated signal comprises an idle signal segment and a data segment, the data segment is a time segment in the signal frame comprising the information to be transmitted after being modulated by the carrier, and the idle signal segment is a time segment in which there is no information in the signal frame.
10. The method of claim 8, wherein modulating the message to be transmitted according to the generated carrier to obtain a modulated signal comprises:
and adjusting a frequency control word or a phase control word in the integer controlled oscillator through an internal clock signal generated by the phase-locked loop and the information to be transmitted to obtain the modulated signal.
11. A method of receiving an energy-carrying wireless message, the method comprising:
receiving an analog signal by a receiving coil of a coupling coil of magnetic resonance;
converting the analog signal to a digital signal according to a predetermined carrier frequency, wherein the carrier frequency matches a resonant frequency of a coupling coil of the magnetic resonance;
demodulating the digital signal through a demodulation module to obtain received information;
and rectifying the received analog signal through a rectifying circuit to obtain transmitted electric energy.
12. The method of claim 11, wherein converting the analog signal to a digital signal according to a predetermined carrier frequency comprises:
sampling the analog signal according to a preset sampling frequency to obtain a sampling signal, wherein the sampling frequency is greater than the resonance frequency;
determining a digital scalar corresponding to the sampling signal according to a predetermined carrier frequency;
and inputting the digital scalar into the trained neural network classification model to obtain a digital signal corresponding to the digital scalar.
13. A transmitting device carrying a wireless message, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 8 to 10 when executing the computer program.
14. A receiving device carrying a wireless message, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 11 to 12 when executing the computer program.
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