Information and radio energy synchronous transmission system control method and system

Abstract

The application discloses a kind of information and wireless power synchronous transmission system control method and system, determine system operating mode, when only transmitting power, using phase-shift control to generate switch control signal, when energy and information need to be transmitted simultaneously, using sinusoidal pulse width modulation to generate control signal, control switch device on-off.The signal acquisition demodulation module is used to restore the corresponding data signal after the current of the receiving end is collected, filtered, demodulated and equalized.The application realizes stable transmission of electric energy by phase-shift control when transmitting electric energy independently, and the switch tube can realize soft switching operation at this time;When wireless power and information are synchronously transmitted, high-order modulation of 16QAM is used to realize high-speed transmission of data, and sinusoidal pulse width control is used to realize synchronous transmission of electric energy and information.

Description

Technical Field

[0001] The present invention relates to the field of synchronous transmission of wireless energy and information, and in particular to a synchronous wireless transmission technology of information and electric energy based on 16QAM. Background Art

[0002] Wireless power transmission is widely used in complex industrial sites and daily life due to its flexible and reliable contactless transmission method, such as underwater operations, mine power supply, implantable medical equipment, new energy vehicle charging, portable communication equipment charging, etc. At the same time, the non-contact nature of wireless power transmission can improve the reliability of equipment in high-power situations, such as rotating electronic equipment such as slip rings. If the actual system can achieve synchronous transmission of wireless power and signals, it can greatly enhance the convenience and intelligence of the system. For example, in the field of automatic guided vehicles, this synchronous transmission technology can improve system efficiency and save management costs. A review of invention patents in wireless power and information synchronous transmission systems in recent years shows the following problems:

[0003] (1) Signal and energy transmission uses time-division multiplexing, which reduces power transmission capacity and efficiency. For example, the patent application with publication number CN102318136A uses time-division multiplexing to transmit power and signals by switching working modes. This makes system control complex, reduces power transmission capacity, and reduces efficiency.

[0004] (2) Adding a separate coupling coil to transmit information and energy to achieve synchronous transmission results in an increase in system volume. For example, in the patent application with publication number CN113013999A, an additional signal coupling coil is added to achieve a synchronous transmission system. While the volume and weight increase, the power coil may also generate electromagnetic interference with the signal coil.

[0005] (3) Power and signal use different transmission frequency bands. When the system transmits information, the energy transmission capacity is greatly reduced. For example, the patent application with publication number CN114826332A uses the third harmonic component to transmit electric energy when transmitting energy and information at the same time, which reduces the power transmission capacity.

[0006] In addition, the patent application with publication number CN113507300A proposes an autonomous circuit based on the principle of parity-time conservation to determine the critical coupling strength parameters to achieve stable energy transmission and full-duplex communication in the system. However, the parameter determination is related to the load and the calculation is relatively complex.

[0007] like Figure 1 As shown, energy transmission is achieved by a series-series (SS) type wireless power transmission system, which includes a transmitter and a receiver. in and i inDC side voltage source voltage and input current respectively, the sending end adopts a full-bridge inverter circuit composed of four MOS tubes, for converting DC into high-frequency AC, and the switching signals are represented by S1-S4. p 、L s Self-inductance of the transmitting coil and the receiving coil respectively (the transmitting end and the receiving end share a coupling coil), and the transmitting coil and the receiving coil are magnetically coupled through mutual inductance M, and the transmitting coil resistance and the receiving coil resistance are represented by R p 、R s respectively. p 、C s are compensation capacitors of the self-inductance of the transmitting coil and the receiving coil, so that the circuit works in a resonant mode, and the transmission efficiency of the system is improved, and the tuning frequency is set to 20 kHz. The receiving end adopts a passive rectifier composed of four rectifier diodes and a filter capacitor C f , which converts high-frequency AC into DC available for the load R l , and U out and i out represent the voltage across the load and the current flowing through the load respectively. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a control method and system for an information and wireless power synchronous transmission system to improve the power transmission capacity and transmission efficiency.

[0009] To solve the above technical problems, the technical solution adopted by the present application is as follows: a control method for an information and wireless power synchronous transmission system, comprising the following steps:

[0010] If the signal transmitted by the sending end of the wireless power transmission system lasts for a first set time of 0, the wireless power transmission system is controlled to work in a power transmission only mode; otherwise,

[0011] the wireless power transmission system is controlled to work in a power and information transmission mode.

[0012] According to the duration of the signal transmitted by the sending end, the wireless power transmission system is controlled to work in a power transmission only mode or a power and information transmission mode without the need to increase an additional coupling coil; compared with the method of transmitting power by using different transmission frequency bands, the present application does not reduce the power transmission capacity when the system transmits information; compared with the method of transmitting signals and energy by using time division multiplexing, the method of the present application does not cause the power transmission capacity and efficiency to be reduced, and the control is simple, the transmission capacity is strong, and the transmission efficiency is high.

[0013] In the present application, the specific implementation process of controlling the wireless power transmission system to work in a power transmission only mode comprises:

[0014] The carrier signal Φ1 of the first frequency is compared with 0 to obtain a switching signal with a switching frequency of the first frequency, and the switching signal with the switching frequency of the first frequency is used as a driving signal of a switching tube of a transmitting end inverter circuit to transmit energy from the transmitting end to a receiving end.

[0015] In the application, the specific implementation process of controlling the wireless power transmission system to work in the mode of simultaneously transmitting power and information includes:

[0016] The binary image data is modulated by using 16QAM at the transmitting end to obtain a single carrier signal containing data information;

[0017] After the single carrier signal is superimposed with a 20 kHz power modulation wave, a modulation signal is obtained through sinusoidal pulse width modulation;

[0018] The modulation signal is compared with a triangular carrier Φ2 to obtain a switching signal with a switching frequency of a second frequency;

[0019] The switching signal with the switching frequency of the second frequency is used as the driving signal of the switching tube of the transmitting end inverter circuit.

[0020] The application is based on the synchronous wireless transmission of 16QAM information and power, the information and power transmission share a coupling coil, and the control method switching is easy to implement. When only transmitting power, phase-shift modulation is used to stably transmit power from the transmitting end to the receiving end, and at this time, soft switching operation of the switching tube can be realized; when transmitting power and information at the same time, sinusoidal pulse width modulation is used to stably transmit power and efficiently transmit information at the same time.

[0021] In the application, the specific implementation process of modulating binary image data by using 16QAM at the transmitting end includes:

[0022] S1, source coding is performed on image data, original image data is losslessly compressed and coded by using a Huffman coding algorithm, and then convolution coding is performed to obtain a coded sequence {a i}, 1≤i≤N1, N1 represents the length of the information sequence;

[0023] S2, a pseudo-random training sequence {a j}, 1≤j≤N2, N2 represents the length of the pseudo-random training sequence, is placed before the sequence {a i} coded by the channel to obtain a to-be-transmitted sequence {a k}, 1≤k≤N1+N2, the total number of bits of the to-be-transmitted sequence is N1+N2;

[0024] S3, the to-be-transmitted sequence {a k} is divided into M symbol combinations according to K=log2M bits as a group to obtain a combination containing a sequence of symbols {b i}, 1≤i≤N; express the symbol sequence {b i} as a complex number sequence {I k};

[0025] S4, upsample and zero-fill the complex number sequence {I k} to obtain a complex signal I(t), t representing a time independent variable when calculating the QAM waveform, 0≤t≤T QAM , T QAM is the length of the QAM waveform determined by the number of symbols and the baud rate;

[0026] S5, generate the pulse shaper output I'(t) using the following formula: I'(t) = I(t)*h(t); where h(t) is the impulse response of the raised cosine roll-off filter;

[0027] S6, obtain the QAM waveform s(t): s(t) = Re[I'(t)]·Φ1(t) + Im[I'(t)]·Φ2(t); where Φ1(t) = cos2πf c t, Φ2(t) = -sin2πf c t is the quadrature carrier, f c is the carrier frequency;

[0028] S7, obtain the single carrier signal s'(t total ) using the following formula:

[0029] s'(t total ) = [s blank (t2), s LFM (t1), s blank (t2), s(t), s blank (t2), s LFM (t1), s blank (t2)], t ∈ [0, T total ]

[0030] where s LFM (t1) = cos(2πf0t1+πΔft1 2 ), t1 ∈ [0, T LFM ], t1 is a time independent variable when calculating the linear frequency modulation wave, T LFM is the length of the linear frequency modulation wave s LFM (t1) inserted before s(t), f0 is the center frequency of the linear frequency modulation wave, Δf is the frequency modulation frequency of the linear frequency modulation wave; s blank (t2) = 0, t2 ∈ [0, T blank ], T blank is the length of the blank window s blank (t2); ttotal T is the time variable of the final single carrier signal total T is the total time length of the single carrier signal total = T QAM + 2T LFM + 2T blank .

[0031] In the data modulation step, the Huffman lossless compression coding can reduce the data amount, thereby reducing the transmission time; the convolution channel coding can perform error control on the transmission error code, thereby further ensuring the reliability of the communication; the default pseudo-random sequence can perform channel matching training on the receiver equalizer, thereby ensuring the normal work of the demodulator; the high autocorrelation that can still be maintained in the distorted channel by using the linear frequency modulation wave can quickly perform coarse synchronization to determine the approximate starting position of the effective data segment of the received signal; in the modulation, the complex signal is used for data processing, and the algorithm is more efficient.

[0032] At the receiving end, the current signal of the sending end transmitted by wireless power transmission is restored to the data signal transmitted, and the specific implementation process includes:

[0033] A current sensor is used to collect the current signal of the receiving end and condition it into an identifiable voltage signal;

[0034] The identifiable voltage signal is subjected to band-pass filtering to obtain a filtered signal;

[0035] The filtered signal is subjected to coarse synchronization interception to obtain an effective data segment, and the effective data segment is subjected to preliminary demodulation by a non-coherent carrier;

[0036] The time delay is estimated by using the maximum likelihood estimation method, and the signal after preliminary demodulation is subjected to fine synchronization by using the time delay;

[0037] The initial phase is estimated by using the maximum likelihood estimation method, the estimated initial phase is subjected to joint carrier phase compensation decision feedback equalization processing, the phase offset generated by the non-coherent carrier demodulation is compensated, and the channel is equalized to obtain a received bit sequence;

[0038] The received bit sequence is subjected to channel decoding, error control and source decoding to restore the original source data.

[0039] The linear frequency modulation wave autocorrelation coarse synchronization quickly locates the starting position of the effective data segment; the maximum likelihood estimation time delay completes more accurate fine synchronization; the joint phase compensation decision feedback adaptive equalizer not only can quickly adaptively track and compensate the time-varying channel, but also can continuously compensate the phase offset and drift, greatly realizing the recovery of the distorted waveform, thereby ensuring the reliable communication; the convolution channel decoding performs error control, which can further reduce the error rate.

[0040] The application further provides a wireless power transmission system control system, comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to realize the steps of the method.

[0041] Compared with the prior art, the application has the beneficial effects that: when the system only transmits power, i.e., without data transmission, the phase-shift control is used to obtain the switching signal, and the energy is stably transmitted from the sending end to the receiving end, and at this time, the switching tube can realize soft switching operation; when the system simultaneously transmits energy and information, the 16QAM modulation and the SPWM are used to realize the stable transmission of the power; at the same time, after the collected current signal is subjected to digital filtering, demodulation and equalization processing at the receiving end, the corresponding data is restored, the channel interference is resisted, and the efficient transmission of the information is realized. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The topological graph of the system for simultaneously transmitting energy and information;

[0043] Figure 2 The control block diagram for generating the switching signal when the embodiment of the application only transmits energy;

[0044] Figure 3 The control block diagram for generating the switching signal when the embodiment of the application simultaneously transmits energy and information;

[0045] Figure 4 The flowchart for the 16QAM data signal modulation based on the embodiment of the application;

[0046] Figure 5 The flowchart for the 16QAM data signal demodulation based on the embodiment of the application;

[0047] Figure 6 The decision demodulator diagram combined with the carrier phase compensation of the embodiment of the application;

[0048] Figure 7 The voltage and current waveforms of the sending end when the data signal and the power signal are simultaneously transmitted and only the power signal is transmitted in the embodiment of the application;

[0049] Figure 8 The voltage and current waveforms of the receiving end when the data signal and the power signal are simultaneously transmitted and only the power signal is transmitted in the embodiment of the application;

[0050] Fig. 9(a) and Fig. 9(b) are respectively the display diagram when the host computer sending platform sends data and the display diagram after the host computer receiving platform receives data. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

[0052] Example 1

[0053] In embodiment 1 of the present invention, the system is divided into two working modes according to whether information is transmitted. If the sending end controller detects that the data signal transmitted by the signal generating module is 0 for 0.15s (the judgment time is 0.15s), then it is a working mode of only transmitting power; otherwise, it is a working mode of simultaneously transmitting power and information.

[0054] like Figure 2 As shown in the figure, in the power transmission only working mode, by using phase shift control, the carrier signal Φ1 with a frequency of 20kHz is compared with 0 to obtain a switching signal with a switching frequency of 20kHz, thereby controlling the system to transmit power. At this time, soft switching operation of the switch tube can be achieved.

[0055] like Figure 3 As shown in the figure, in the working mode of transmitting power and information at the same time: 16QAM is used to modulate the data at the transmitting end to obtain a single carrier signal containing data information; after superimposing the single carrier signal with the 20kHz power modulation wave, a switching signal with a switching frequency of 100kHz is obtained by comparing it with the triangular carrier Φ2 (100kHz) through sinusoidal pulse width modulation (SPWM), thereby realizing the transmission of power carrying information. s After being collected by the current sensor, the information demodulation module filters, demodulates, and balances the information, ultimately obtaining the transmitted data information and achieving efficient information transmission. Relevant parameters and information generated during the processing are also displayed on the signal generation module and the signal acquisition and demodulation module respectively.

[0056] Figure 4 The information modulation process based on 16QAM is shown as follows:

[0057] S1. Perform source encoding on the binary image data, using the Huffman lossless compression algorithm.

[0058] S2, perform convolution channel coding on the information sequence to obtain the coded sequence {a i},1≤i≤N1, N1 represents the length of the information bit sequence.

[0059] S3, the pseudo-random training sequence {a j},1≤j≤N2, N2 represents the length of the pseudo-random training sequence, placed in the encoded sequence {a i}, get the sequence to be sent {a k}, 1≤k≤N1+N2, the total number of bits is N1+N2.

[0060] S4, perform M-order quadrature amplitude modulation (QAM modulation), where M=16. The M-order quadrature amplitude modulation modulates the sequence to be transmitted {a k} According to K = log2M bits as a group, there are M kinds of code element combinations, and the final result will include The codeword sequence of codewords {b i}, 1≤i≤N, reasonably select the size of N2, ensure that N is an integer, the first N s2 is the training code element, followed by N s1 The code element is mapped to the rectangular constellation diagram in the Gray code mode, where the coordinates of the constellation points in the rectangular constellation diagram are (A mi ,A mq ), the constellation points are represented by complex numbers, then the symbol sequence {b i} can be expressed as a complex sequence {I k}, if m=(b i ) 10 ,m∈{1,2,3,…,M}, then:

[0061]

[0062] S5. Upsample the complex sequence and fill it with zeros to increase the sampling rate to obtain the complex signal I(t). Set the roll-off coefficient α and the symbol duration T, and use the following formula:

[0063]

[0064] The impulse response of the raised cosine roll-off filter h(t) can be generated and convolved with I(t) to obtain the pulse shaper output I′(t):

[0065] I′(t)=I(t)*h(t) (2)

[0066] S6, Carrier modulation. Set the carrier frequency f c , generate orthogonal carriers:

[0067] Φ1(t)=cos2πf c t (3)

[0068] Φ2(t)=-sin2πf c t (4)

[0069] The orthogonal carrier is coherently modulated with the baseband signal to obtain the QAM waveform:

[0070] s(t)=Re[I′(t)]·cos2πf c t-Im[I′(t)]·sin2πf c t (5)

[0071] S7, insert LFM synchronization header. Insert a specific time length T before the signal to be sent s(t) LFM Linear frequency modulation wave s LFM (t1) = cos(2πf0t1+πΔft1 2 ),t1∈[0,T LFM ]. And combined with a certain length of time T blank The blank window sblank(t2)=0, and at the same time, the LFM waveform is also inserted at the end position of the signal to be sent s(t) to indicate the end of the signal, and the final transmission signal s′(t total ):

[0072] s′(t total )=[s blank (t2),s LFM (t1),s blank (t2),s(t),s blank (t2),s LFM (t1),s blank (t2)](6)

[0073] Figure 5 The specific information demodulation process based on 16QAM is as follows:

[0074] S1. The received signal passes through a bandpass filter to filter out the high-frequency charging signal component and the Gaussian white noise outside the frequency band.

[0075] S2, coarse synchronization intercepts the valid data segment. Combined with the length T of the LFM synchronization header LFM and the length of the blank window T blank , we can get the starting position τ0 of the received 16QAM waveform r(t), where τ max To make the linear frequency modulation signal s LFM (t) The value of the independent variable when the correlation operation with the received signal takes the maximum correlation value:

[0076]

[0077] S3, preliminary demodulation. According to the carrier frequency f c Recover the incoherent orthogonal carrier. Multiply the incoherent orthogonal carrier with r(t):

[0078] J I '(t)=r m (t)·Φ1(t) (8)

[0079] J' Q (t) = r m (t)·Φ1(t) (9)

[0080] J' I(t) and J' Q (t) through the cutoff frequency at f c and 2f c The low-pass filter between the two filters removes the double frequency signal component and obtains the demodulated signal J I (t) and J Q (t). The complex received baseband signal is:

[0081] J(t)=J I (t)+jJ Q (t) (10)

[0082] By sampling the code element interval, the complex received sequence {J k}, for {J k}Drawing the constellation diagram can obtain the constellation diagram after preliminary demodulation.

[0083] S4. Maximum likelihood estimation of fine synchronization. Use the maximum likelihood estimation method to estimate the fixed delay The formula is as follows:

[0084]

[0085] N s is the number of code element sampling points, when a certain offset τ x The point that maximizes the real part of the sum of the products of the received waveform sampling sequence and the known training conjugate sequence can be regarded as the estimated value of the fixed time delay τ0.

[0086] S5. Estimate the initial phase using the maximum likelihood estimation method The formula is as follows:

[0087]

[0088] A certain rotation angle θ x If the actual received sequence is similar to the transmitted sequence, then the rotation angle

[0089] Degree θ x is the initial phase estimate

[0090] S6. Decision feedback equalization processing combined with carrier phase compensation.

[0091] The output of the feedforward filter is obtained after phase compensation. k , which compensates for the phase offset caused by the incoherent carrier demodulation and then combines it with the output q of the feedback filter k Add together to remove the inter-symbol interference generated by the previous symbol at the current position and obtain the current symbol equalization estimate After passing the judgment link, the judgment value of the current code element is obtained

[0092] When the equalizer is trained using known training symbols, the error amount in the training-oriented mode is calculated as follows:

[0093]

[0094] When equalizing information symbols, the error amount in the decision-directed mode is calculated as follows:

[0095]

[0096] Using the error e k Combined with the recursive least squares (RLS) adaptive algorithm, the decision feedback equalizer tap coefficients can be adaptively adjusted to match channel changes.

[0097] Using MSE to estimate carrier phase The instantaneous value of the gradient is used as the carrier phase update signal:

[0098]

[0099] The second-order phase update equation is as follows:

[0100]

[0101] in is the proportional-integral tracking constant.

[0102] After completing joint carrier phase compensation and channel equalization, the code element sequence can be obtained according to the one-to-one correspondence between constellation points and code elements, and finally the received bit sequence can be obtained.

[0103] S7. Channel decoding and error control. Maximum a posteriori probability decoding of convolutional codes (Lalit R. Bahl, John Cocke, Frederick Jelinek, Josef Raviv. Optimal decoding of linear codes for minimizing symbol error rate (Corresp.). [J]. IEEE Trans. Information Theory, 1974, 20(2)) is performed on the received bit sequence. The bits with the maximum a posteriori probability are selected as the received bits during decoding, further ensuring communication reliability.

[0104] S8, Source decoding. Decode the data into original source data according to Huffman lossless source coding rule (Huffman, D. A. (1952). "A Method for the Construction of Minimum Redundancy Codes," Proc. IRE, vol. 40, pp. 1098-1101, September.).

[0105] The following is used to verify that the embodiments of the application can transmit power from the sending end to the receiving end when only transmitting power; can realize stable energy transmission and efficient information transmission when both energy and information need to be transmitted simultaneously.

[0106] Energy transmission system parameters:

[0107] DC input voltage U in = 110V, transmit coil inductance and receive coil inductance L p = L s = 190μH, mutual inductance M = 60μH, sending end compensation capacitor and receiving end compensation capacitor C p = C s = 310nF, sending end resistance and receiving end resistance R p = R s = 0.06Ω, DC side filter capacitor C f = 1000μF, load resistance R f = 20Ω, triangular carrier Φ1 frequency f tri1 = 20kHz, triangular carrier Φ2 frequency f tri2 = 100kHz.

[0108] Information transmission system parameters:

[0109] Modulation parameters:

[0110] Modulation alphabet M = 16, baud rate R B = 2000 Baud, bit rate R b = 8000 b / s, carrier frequency f c = 1000 Hz, training symbol length N s2 = 200, modulation sampling rate f s0 = 100000 Hz. Pulse shaper parameters: roll-off factor a = 0.7. Linear frequency modulation wave parameters (LFM synchronization head parameters): center frequency f0 = 700 Hz, stop frequency f1 = 1300 Hz, linear frequency modulation wave length T LFM = 0.1s, space length T blank = 0.1s, sending sampling rate f s = 40000 Hz.

[0111] Demodulation parameters:

[0112] Sampling rate f s =40000Hz, number of forward taps of feedforward filter N1=8, number of backward taps of feedforward filter N2=10, number of taps of feedback filter N b =8, RLS algorithm forgetting factor ω = 0.99, second-order digital phase-locked loop proportional integral tracking constant K f1 =0.01, K f2 =0.001.

[0113] Figure 7 The voltage v at the transmitting end obtained by transmitting energy and image signal simultaneously under Simulink simulation is p , sending end current i p waveform, Figure 8 The receiving end voltage v obtained by transmitting energy and image signal at the same time s , receiving end current i s Waveform. After data transmission is completed, after 0.15s, the mode is switched to power transmission only. As can be seen from the figure, when power and signal are transmitted simultaneously, the data modulation wave obtained by 16QAM modulation is superimposed on the power modulation wave by the transmitter, and the current i s The corresponding changes will occur, and at this time, the s , and then demodulate and restore the data information. At the same time, after the data transmission is completed, the soft switching operation of the switch tube can be realized in the power transmission only working mode. The software wireless communication system experimental platform designed, developed and manufactured by ourselves is used for transmission. Figure 7 The upper computer display diagrams of the data are shown in Figure 9(a) and Figure 9(b). Figure 9(a) and Figure 9(b) are the display diagrams when the upper computer sending platform sends data and after the upper computer receiving platform receives data, respectively. As can be seen from Figure 9(a) and Figure 9(b), the received image signal is basically restored to the Hunan University logo, and the bit error rate at this time is 4×10 -4 , which verifies the feasibility of the information and power synchronous transmission system proposed in the embodiment of the present invention.

[0114] Example 2

[0115] This embodiment provides a wireless power transmission system control system, including a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of the above-mentioned embodiment 1.

[0116] In some implementations, the memory may be a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.

[0117] In other implementations, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or other general-purpose processors, which are not limited herein.

Claims

1. A method for controlling a synchronous transmission system of information and wireless power, characterized in that: The following steps are involved: If the signal transmitted by the transmitting end of the wireless power transmission system lasts for a first set time of 0, controlling the wireless power transmission system to operate in a working mode of only transmitting electric energy; otherwise, Control the wireless power transmission system to operate in a mode of simultaneously transmitting power and information; The specific implementation process of controlling the wireless power transmission system to operate in a mode of simultaneously transmitting power and information includes: At the transmitting end, the binary image data is modulated using 16QAM to obtain a single carrier signal containing data information; After superimposing the single carrier signal with the 20kHz power modulation wave, a modulation signal is obtained by performing sinusoidal pulse width modulation; Comparing the modulated signal with the triangular carrier Φ2 to obtain a switching signal having a switching frequency of the second frequency; Using the switching signal with the second switching frequency as a driving signal for the switching tube of the inverter circuit at the transmitting end; At the receiving end, the current signal of the transmitting end transmitted via wireless power is restored to the transmitted data signal. The specific implementation process includes: Use a current sensor to collect the current signal at the receiving end and condition it into a recognizable voltage signal; performing bandpass filtering on the identifiable voltage signal to obtain a filtered signal; Performing coarse synchronization interception on the filtered signal to obtain a valid data segment, and performing preliminary demodulation on the valid data segment using a non-coherent carrier; estimating a time delay using a maximum likelihood estimation method, and performing fine synchronization on the initially demodulated signal using the time delay; The initial phase is estimated using the maximum likelihood estimation method, and the estimated initial phase is subjected to decision feedback equalization processing with joint carrier phase compensation. The phase offset caused by incoherent carrier demodulation is compensated and the channel is equalized to obtain a received bit sequence. Perform channel decoding, error control, and source decoding on the received bit sequence to restore the original source data.

2. The information and wireless power synchronous transmission system control method according to claim 1, characterized in that: The specific implementation process of controlling the wireless power transmission system to operate in the power transmission only mode includes: The carrier signal Φ1 of the first frequency is compared with 0 to obtain a switching signal with the first frequency, and the switching signal with the first frequency is used as a driving signal for the switching tube of the inverter circuit at the transmitting end to transmit energy from the transmitting end to the receiving end.

3. The information and wireless power synchronous transmission system control method according to claim 1, characterized in that: The specific implementation process of using 16QAM to modulate binary image data at the transmitter includes: S1, perform source coding on the image data; perform channel coding on the information sequence to obtain the sequence {a i }, 1≤i≤N1, N1 represents the length of the information sequence; S2, the pseudo-random training sequence {a j },1≤j≤N2, N2 represents the length of pseudo-random training sequence, placed in the sequence {a i } before, get the sequence to be sent {a k }, 1≤k≤N1+N2, the total number of bits in the sequence to be sent is N1+N2; S3, the sequence to be sent {a k } According to K = log2M bits as a group, divided into M code combinations, get The codeword sequence of codewords {b i },1≤i≤N; the code element sequence {b i } is represented as a complex sequence {I k }; S4, the complex sequence {I k } Perform upsampling and zero padding operations to obtain the complex signal I(t), where t represents the time independent variable when calculating the QAM waveform, 0≤t≤T QAM , T QAM is the QAM waveform duration; S5. Generate the pulse shaper output I′(t) using the following formula: I′(t)=I(t)*h(t); where h(t) is the impulse response of the raised cosine roll-off filter; S6. Obtain QAM waveform s(t): s(t)=Re[I′(t)]·Φ1(t)+Im[I′(t)]·Φ2(t); Where Φ1(t)=cos2πf c t, Φ2(t)=-sin2πf c t is the orthogonal carrier, f c is the carrier frequency; S7, use the following formula to obtain the single carrier signal s′(t total ): s′(t total )=[s blank (t2),s LFM (t1),s blank (t2),s(t),s blank (t2),s LFM (t1),s blank (t2)],t∈[0,T total ]; Among them, s LFM (t1) = cos(2πf0t1+πΔft1 2 ),t1∈[0,T LFM ], t1 is the time independent variable when calculating the linear frequency modulation wave, T LFM is the linear frequency modulation wave s inserted before s(t) LFM (t1) is the duration, f0 is the center frequency of the linear FM wave, Δf is the FM frequency of the linear FM wave; s blank (t2)=0,t2∈[0,T blank ], T blank A blank window blank The duration of (t2); t total is the time independent variable of the final single carrier signal, T total is the total duration of the single carrier signal, T total =T QAM +2T LFM +2T blank .

4. The information and wireless power synchronous transmission system control method according to claim 3, characterized in that: The impulse response h(t) of the raised cosine roll-off filter is: T is the symbol duration; α is the roll-off factor.

5. An information and wireless energy synchronous transmission control system, comprising a memory, a processor, and a computer program stored in the memory; characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 4.

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