Wireless signal and electric energy transmission method, device, equipment, medium and product

Abstract

The invention provides a wireless signal and electric energy transmission method and device, equipment, a medium and a product. In the method, a transmitting end of wireless transmission equipment determines a modulation mode of each signal according to a numerical value of each signal in a to-be-transmitted wireless signal sequence, and then the transmitting coil is controlled to operate after modulation. A receiving end of wireless transmission equipment obtains a to-be-demodulated voltage signal sequence through a receiving coil and then carries out Fourier transform processing to obtain a voltage amplitude corresponding to each odd harmonic frequency, and then a target harmonic frequency is determined from the voltage amplitude; and demodulating according to the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain a demodulated signal. According to the scheme, the transmitting end carries out modulation according to the determined modulation mode of the wireless signal to be transmitted, so that the receiving end determines the target harmonic frequency from the odd harmonic frequencies and then carries out demodulation, the interference of an interference source can be reduced, and the accuracy of the demodulated signal is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, and in particular to a wireless signal and electric energy transmission method, device, equipment, medium and product. BACKGROUND

[0002] With the continuous development of science and technology, wireless electric energy transmission technology is increasingly applied in the power grid field, and can be used to transmit electric energy in some scenarios where cables cannot be used or are not suitable. In order to save costs, wireless signals and electric energy can be transmitted together.

[0003] In the prior art, a wireless transmission device includes a sending end and a receiving end. The sending end modulates a wireless signal and controls the operation of a transmitting coil according to the modulated signal. The receiving coil of the receiving end can thus generate electric energy, and the modulated signal can be obtained by demodulating the fundamental frequency of the voltage signal sequence generated by the electric energy.

[0004] However, due to the presence of interference sources around the wireless transmission device, the voltage signal sequence will be disturbed, resulting in inaccurate demodulated signals. SUMMARY

[0005] The wireless signal and electric energy transmission method, device, equipment, medium and product provided by the embodiments of the present application solve the problem of inaccurate demodulated signal sequence caused by the existing wireless signal and electric energy transmission method when it is disturbed.

[0006] In a first aspect, the embodiments of the present application provide a wireless signal and electric energy transmission method applied to a receiving end of a wireless transmission device, and the method comprises:

[0007] obtaining a to-be-demodulated voltage signal sequence through a receiving coil;

[0008] performing Fourier transform processing on the to-be-demodulated voltage signal sequence to obtain a voltage amplitude corresponding to each odd harmonic frequency;

[0009] determining a target harmonic frequency according to a preset amplitude threshold corresponding to each odd harmonic frequency and the voltage amplitude;

[0010] demodulating according to the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain a demodulated signal.

[0011] In a possible implementation, the determination of the target harmonic frequency according to the preset amplitude threshold corresponding to each odd harmonic frequency and the voltage amplitude comprises:

[0012] For each odd harmonic frequency, if the voltage amplitude corresponding to the odd harmonic frequency is less than the preset amplitude threshold corresponding to the odd harmonic frequency, then the odd harmonic frequency is selected as the candidate harmonic frequency.

[0013] Determine the target harmonic frequency based on all candidate harmonic frequencies;

[0014] Specifically, for each odd-order harmonic frequency, the preset amplitude threshold corresponding to the odd-order harmonic frequency is greater than the preset demodulation threshold corresponding to the odd-order harmonic frequency.

[0015] In one possible implementation, determining the target harmonic frequency based on all candidate harmonic frequencies includes:

[0016] The minimum value among all candidate harmonic frequencies is taken as the target harmonic frequency; or,

[0017] All candidate harmonic frequencies are used as target harmonic frequencies.

[0018] In one possible implementation, the demodulation based on the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain the demodulated signal includes:

[0019] For each target harmonic frequency, demodulation is performed based on the voltage amplitude corresponding to the target harmonic frequency and a preset demodulation threshold to obtain the candidate signal corresponding to the target harmonic frequency;

[0020] If the number of target harmonic frequencies is equal to 1, then the candidate signal corresponding to the target harmonic frequency is used as the demodulated signal.

[0021] If the number of target harmonic frequencies is greater than 1, then the demodulated signal is determined based on the candidate signal corresponding to each target harmonic frequency.

[0022] In one possible implementation, the step of demodulating based on the voltage amplitude corresponding to the target harmonic frequency and a preset demodulation threshold to obtain the candidate signal corresponding to the target harmonic frequency includes:

[0023] If the voltage amplitude corresponding to the target harmonic frequency is greater than or equal to the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulation signal corresponding to the target harmonic frequency is determined to be 1;

[0024] If the voltage amplitude corresponding to the target harmonic frequency is less than the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulation signal corresponding to the target harmonic frequency is determined to be 0.

[0025] In one possible implementation, the candidate signal corresponding to each target harmonic frequency is 0 or 1, and the step of determining the demodulated signal based on the candidate signal corresponding to each target harmonic frequency includes:

[0026] If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is greater than or equal to the number of 0s, then the demodulated signal is determined to be 1;

[0027] If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is less than the number of 0s, then the demodulated signal is determined to be 0.

[0028] Secondly, embodiments of this application provide a wireless signal and power transmission method, applied to the transmitting end of a wireless transmission device, the method comprising:

[0029] Based on the acquired values ​​of the wireless signal to be transmitted, determine the modulation method of the wireless signal to be transmitted;

[0030] According to the modulation method of the wireless signal to be transmitted, the wireless signal to be transmitted is modulated to obtain a control signal;

[0031] The transmitting coil is controlled to operate according to the control signal.

[0032] In one possible implementation, determining the modulation scheme of the wireless signal to be transmitted based on the acquired numerical value of the wireless signal to be transmitted includes:

[0033] If the wireless signal to be transmitted is 1, then the modulation method of the wireless signal to be transmitted is determined to be unipolar sinusoidal pulse width modulation.

[0034] If the wireless signal to be transmitted is 0, then the modulation method of the wireless signal to be transmitted is determined to be unipolar frequency-doubled sine wave pulse width modulation.

[0035] Thirdly, embodiments of this application provide a wireless signal and power transmission device, comprising:

[0036] Processing module, used for:

[0037] The sequence of voltage signals to be demodulated is acquired by the receiving coil;

[0038] The voltage signal sequence to be demodulated is subjected to Fourier transform processing to obtain the voltage amplitude corresponding to each odd harmonic frequency;

[0039] The target harmonic frequency is determined based on the preset amplitude threshold and voltage amplitude corresponding to each odd-order harmonic frequency;

[0040] The demodulation module is used to demodulate the signal based on the voltage amplitude corresponding to each target harmonic frequency and the preset demodulation threshold.

[0041] Fourthly, embodiments of this application provide a wireless signal and power transmission device, comprising:

[0042] The processing module is used to determine the modulation method of the wireless signal to be transmitted based on the acquired value of the wireless signal to be transmitted.

[0043] A modulation module is used to modulate the wireless signal to be transmitted according to the modulation method of the wireless signal to be transmitted, so as to obtain a control signal;

[0044] The control module is also used to control the operation of the transmitting coil according to the control signal.

[0045] Fifthly, embodiments of this application provide a wireless transmission device, including:

[0046] Sender and receiver;

[0047] The transmitting end includes a first processor, a first memory, and a transmitting coil;

[0048] The receiving end includes a second processor, a second memory, and a receiving coil;

[0049] The first memory is used to store the executable instructions of the first processor;

[0050] The second memory is used to store the executable instructions of the second processor;

[0051] Wherein, the first processor is configured to execute the wireless signal and power transmission method according to any one of the first aspects by executing the executable instructions;

[0052] The second processor is configured to perform the wireless signal and power transmission method according to any of the second aspects by executing the executable instructions.

[0053] In a sixth aspect, embodiments of this application provide a readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the wireless signal and power transmission method described in either the first or second aspect.

[0054] In a seventh aspect, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the wireless signal and power transmission method described in either the first or second aspect.

[0055] The wireless signal and power transmission method, apparatus, device, medium, and product provided in this application embodiment determine the modulation scheme of the wireless signal to be transmitted based on its value at the transmitting end of the wireless transmission device, and then modulates and controls the operation of the transmitting coil. The receiving end of the wireless transmission device acquires the voltage signal sequence to be demodulated through the receiving coil, performs Fourier transform processing to obtain the voltage amplitude corresponding to each odd-order harmonic frequency, and then determines the target harmonic frequency. Demodulation is then performed based on the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain the demodulated signal. This scheme, by having the transmitting end modulate the wireless signal according to the determined modulation scheme, allows the receiving end to determine the target harmonic frequency from the odd-order harmonic frequencies before demodulation, reducing interference from interference sources and improving the accuracy of the demodulated signal. Attached Figure Description

[0056] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0057] Figure 1 A flowchart illustrating an embodiment of the wireless signal and power transmission method provided in this application;

[0058] Figure 2 A schematic diagram of the voltage amplitude provided in this application Figure 1 ;

[0059] Figure 3 A schematic diagram of the voltage amplitude provided in this application Figure 2 ;

[0060] Figure 4 A flowchart illustrating Embodiment 2 of the wireless signal and power transmission method provided in this application;

[0061] Figure 5 A schematic diagram of the structure of a first embodiment of the wireless signal and power transmission device provided in this application;

[0062] Figure 6 A schematic diagram of the structure of Embodiment 2 of the wireless signal and power transmission device provided in this application;

[0063] Figure 7 This is a schematic diagram of the structure of a wireless transmission device provided in this application.

[0064] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0065] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0066] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] With the continuous development of technology, wireless power transmission technology is being used more and more in the power grid field, enabling power transmission in scenarios where cables cannot be used or are not suitable. Furthermore, to save costs, wireless signals can be transmitted together with electrical energy.

[0068] In existing technologies, wireless transmission devices include a transmitter and a receiver. The transmitter modulates the wireless signal and controls the operation of the transmitting coil based on the modulated signal. The receiving coil of the receiver generates electrical energy, and demodulates the fundamental frequency of the voltage signal sequence of the generated electrical energy to obtain the demodulated signal.

[0069] However, interference sources may exist around wireless transmission equipment, which can disrupt the voltage signal sequence and lead to inaccurate demodulated signals.

[0070] To address the problems existing in the prior art, the inventors, during their research on wireless signal and power transmission methods, discovered that to improve the accuracy of the demodulated signal, the modulation method of the wireless signal is determined based on its numerical value during modulation at the transmitting end of the wireless transmission device, thereby controlling the operation of the transmitting coil after modulation. At the receiving end of the wireless transmission device, after acquiring the voltage signal sequence to be demodulated through the receiving coil, Fourier transform processing is performed to obtain the voltage amplitude corresponding to each odd-order harmonic frequency, thereby determining the target harmonic frequency; then, demodulation is performed based on the voltage amplitudes corresponding to all target harmonic frequencies and a preset demodulation threshold to obtain the demodulated signal. Based on the above inventive concept, the wireless signal and power transmission scheme of this application was designed.

[0071] The following provides examples illustrating the application scenarios of the wireless signal and power transmission method provided in this application.

[0072] For example, in this application scenario, a receiver for the detection device and a receiver for the wireless transmission device are installed inside the enclosed device, and a transmitter for the wireless transmission device is installed outside the enclosed device.

[0073] The transmitting end of the wireless transmission device can control the operation of the transmitting coil according to the modulated signal, generating a change in the magnetic field. The receiving coil in the receiving end of the wireless transmission device generates electrical energy due to the change in the magnetic field to power the detection device. At the same time, it can demodulate the voltage signal sequence and transmit it to the detection device to control its operation.

[0074] Enclosed electrical equipment contains insulating gas, which effectively improves insulation strength and arc-extinguishing capability. Examples include high-voltage switchgear, gas-insulated switchgear, gas-insulated ring main units, and gas-insulated circuit breakers. Therefore, to prevent gas leakage, wireless methods are required for signal and power transmission.

[0075] To adjust the sampling frequency of the testing equipment, staff input the wireless signal to be transmitted into the transmitter of the wireless transmission equipment. The transmitter determines the modulation scheme of the wireless signal based on its value; then, it modulates the signal according to the modulation scheme to obtain a control signal, which is used to control the operation of the transmitting coil.

[0076] The receiver of the wireless transmission device acquires the voltage signal sequence to be demodulated through the receiving coil, and then performs Fourier transform processing on the voltage signal sequence to obtain the voltage amplitude corresponding to each odd harmonic frequency.

[0077] Then, the target harmonic frequency is determined based on the preset amplitude threshold and voltage amplitude corresponding to each odd-order harmonic frequency.

[0078] Finally, demodulation is performed based on the voltage amplitude corresponding to all target harmonic frequencies and the preset demodulation threshold to obtain the demodulated signal.

[0079] For example, the preset demodulation threshold corresponding to the first harmonic frequency can be 0.02V, 0.03V, 0.04V, etc.; the preset demodulation threshold corresponding to the third harmonic frequency can be 0.002V, 0.003V, 0.004V, etc.; the preset demodulation threshold corresponding to the fifth harmonic frequency can be 0.0005V, 0.001V, 0.0015V, etc.; the embodiments of this application do not limit the preset demodulation threshold, which can be determined according to the actual situation.

[0080] The receiver of the wireless transmission device generates electrical energy through the receiving coil to power the detection device, and also transmits the demodulated signal to the detection device. The detection device adjusts its sampling frequency according to the demodulated signal.

[0081] It should be noted that the above scenario is only an example of an application scenario provided by the embodiments of this application. The embodiments of this application do not limit the actual form of the various devices included in the scenario, nor do they limit the interaction method between devices. In the specific application of the solution, it can be set according to actual needs.

[0082] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0083] Figure 1 This is a flowchart illustrating an embodiment of the wireless signal and power transmission method provided in this application. This embodiment describes how the transmitting end of the wireless transmission device determines the modulation method based on the value of the wireless signal to be transmitted and performs modulation, while the receiving end of the wireless transmission device determines the target harmonic frequency from the odd-order harmonic frequencies and then performs demodulation. The method in this embodiment can be implemented through software, hardware, or a combination of both. Figure 1 As shown, the wireless signal and power transmission method specifically includes the following steps:

[0084] S101: The transmitting end determines the modulation method of the wireless signal to be transmitted based on the acquired value of the wireless signal to be transmitted.

[0085] In this step, after the transmitting end of the wireless transmission device acquires the wireless signal to be transmitted, it needs to modulate it in order to achieve signal transmission. Therefore, the modulation method of the wireless signal to be transmitted is determined based on the acquired value of the wireless signal to be transmitted.

[0086] It should be noted that the wireless signal to be transmitted is either 0 or 1.

[0087] Specifically, if the wireless signal to be transmitted is 1, then the modulation method of the wireless signal to be transmitted is determined to be unipolar sinusoidal pulse width modulation (SPWM).

[0088] If the wireless signal to be transmitted is 0, then the modulation method of the wireless signal to be transmitted is determined to be unipolar frequency doubling SPWM mode.

[0089] Because unipolar SPWM modulation is used, the voltage signal sequence received at the receiving end contains n-th harmonic signals, where n is a positive integer. Furthermore, under interference-free conditions, the voltage amplitude at the frequencies of odd-order harmonic signals is relatively large; these odd-order harmonic frequencies are also called odd-order harmonic frequencies. Using unipolar frequency-doubled SPWM modulation results in the same n-th harmonic signals in the received voltage signal sequence. Under interference-free conditions, the voltage amplitude at the frequencies of odd-order harmonic signals is extremely small, close to zero. Therefore, unipolar frequency-doubled SPWM modulation is used for 0, and unipolar SPWM modulation is used for 1, to distinguish between 0 and 1 later. Consequently, the voltage amplitude at the odd-order harmonic frequency is used for subsequent demodulation.

[0090] S102: The transmitting end modulates the wireless signal to be transmitted according to the modulation method of the wireless signal to be transmitted, and obtains the control signal.

[0091] In this step, after obtaining the modulation scheme of the wireless signal to be transmitted, the transmitting end modulates it according to the modulation scheme to obtain the control signal.

[0092] S103: The transmitting end controls the operation of the transmitting coil according to the control signal.

[0093] In this step, after receiving the control signal, the transmitting end controls the operation of the transmitting coil according to the control signal. The control signal includes command signals for multiple switching transistors. The command signals can control the switching transistors to turn on or off. By controlling the switching transistors through the control signal, the voltage across the transmitting coil is changed, causing a change in the current flowing through the transmitting coil, which in turn causes a change in the magnetic field.

[0094] S104: The receiving end acquires the sequence of voltage signals to be demodulated through the receiving coil.

[0095] In this step, the transmitting end controls the operation of the transmitting coil, causing a change in the magnetic field. As a result, the receiving coil at the receiving end can generate electrical energy, thereby obtaining the voltage signal sequence to be demodulated through the receiving coil.

[0096] When the transmitting end receives a control signal, it controls the transmitting coil to operate for a period of time based on that signal. During this time, the receiving end collects voltage signals, thus obtaining a sequence of voltage signals to be demodulated. The voltage signals in the demodulated voltage signal sequence are arranged in chronological order from earliest to latest, with the timestamp representing the acquisition time.

[0097] S105: The receiver performs Fourier transform processing on the voltage signal sequence to be demodulated to obtain the voltage amplitude corresponding to each odd harmonic frequency.

[0098] In this step, after the receiver obtains the voltage signal sequence to be demodulated, in order to determine how to perform demodulation and improve the accuracy of demodulation, it is necessary to perform Fourier transform processing on the voltage signal sequence to be demodulated to obtain the voltage amplitude corresponding to each odd harmonic frequency.

[0099] The receiver first performs a Fourier transform on the voltage signal sequence to be demodulated to obtain frequency domain data, and then fits it to obtain a frequency domain curve. The horizontal axis of the frequency domain curve is frequency, and the vertical axis is a complex number that includes voltage amplitude and phase.

[0100] By combining this with the preset fundamental frequency, the odd-order harmonic frequencies can be determined. Furthermore, by combining this with the frequency domain curve, the voltage amplitude corresponding to each odd-order harmonic frequency can be determined.

[0101] It should be noted that the preset fundamental frequency can be 100kHz, 500kHz, 1000kHz, etc. This application embodiment does not limit the preset fundamental frequency, and it can be determined according to the actual situation.

[0102] It should be noted that the maximum value among all odd-order harmonic frequencies is the preset odd-order harmonic frequency. The preset odd number can be 7, 9, 11, etc. This application embodiment does not limit the preset odd number and can be determined according to the actual situation.

[0103] S106: The receiver determines the target harmonic frequency based on the preset amplitude threshold and voltage amplitude corresponding to each odd-order harmonic frequency.

[0104] In this step, after the receiver obtains the voltage amplitude corresponding to each odd harmonic frequency, in order to determine the voltage amplitude that can be demodulated, it is necessary to combine the preset amplitude threshold corresponding to each odd harmonic frequency to determine the target harmonic frequency.

[0105] Specifically, for each odd-order harmonic frequency, if the voltage amplitude corresponding to the odd-order harmonic frequency is less than the preset amplitude threshold corresponding to the odd-order harmonic frequency, then the odd-order harmonic frequency is selected as the candidate harmonic frequency.

[0106] Then, based on all the candidate harmonic frequencies, the target harmonic frequency is determined.

[0107] The preset amplitude threshold corresponding to the odd-order harmonic frequency is used to determine whether the odd-order harmonic is interfered with. When the odd-order harmonic is interfered with, even if the wireless signal to be transmitted is 0, the voltage amplitude of the frequency of the odd-order harmonic signal will be very large, exceeding the preset amplitude threshold. When the wireless signal to be transmitted is 1, the voltage amplitude of the frequency of the odd-order harmonic signal will also exceed the preset amplitude threshold.

[0108] Therefore, if the voltage amplitude corresponding to the odd-numbered harmonic frequency is less than the preset amplitude threshold corresponding to the odd-numbered harmonic frequency, it means that the odd-numbered harmonic is not disturbed and can be used for demodulation; if the voltage amplitude corresponding to the odd-numbered harmonic frequency is greater than or equal to the preset amplitude threshold corresponding to the odd-numbered harmonic frequency, it means that the odd-numbered harmonic is disturbed and cannot be used for demodulation.

[0109] It should be noted that for each odd-order harmonic frequency, the preset amplitude threshold corresponding to that odd-order harmonic frequency is greater than the preset demodulation threshold corresponding to that odd-order harmonic frequency. For example, the preset amplitude threshold corresponding to the first harmonic frequency can be 0.05V, 0.06V, 0.07V, etc.; the preset amplitude threshold corresponding to the third harmonic frequency can be 0.005V, 0.006V, 0.007V, etc.; the preset amplitude threshold corresponding to the fifth harmonic frequency can be 0.0015V, 0.002V, 0.0025V, etc. This application embodiment does not limit the preset amplitude threshold; it can be determined according to the actual situation. The preset amplitude threshold corresponding to the odd-order harmonic frequencies can be obtained using simulation.

[0110] For example, the voltage amplitude corresponding to the first harmonic frequency is greater than the preset amplitude threshold corresponding to the first harmonic frequency. Figure 2 A schematic diagram of the voltage amplitude provided in this application Figure 1 ,like Figure 2 As shown, when the wireless signal to be transmitted is 1, the voltage amplitude of the first harmonic signal frequency is greater than the preset amplitude threshold, and also greater than the preset demodulation threshold. When the wireless signal to be transmitted is 0, the voltage amplitude of the first harmonic signal frequency is greater than the preset amplitude threshold, and also greater than the preset demodulation threshold. Since the preset adjustment threshold is used to compare with the voltage amplitude to determine whether the demodulated signal is 0 or 1, regardless of whether the wireless signal to be transmitted is 1 or 0, because the voltage amplitude is greater than the preset demodulation threshold, the demodulated signal is always 1, which is inaccurate and therefore cannot be used for demodulation.

[0111] For example, the voltage amplitude corresponding to the third harmonic frequency is less than the preset amplitude threshold corresponding to the third harmonic frequency. Figure 3 A schematic diagram of the voltage amplitude provided in this application Figure 2 ,like Figure 3As shown, when the wireless signal to be transmitted is 1, the voltage amplitude of the third harmonic signal frequency is less than the preset amplitude threshold and greater than the preset demodulation threshold, so the demodulated signal is 1. When the wireless signal to be transmitted is 0, the voltage amplitude of the third harmonic signal frequency is less than the preset amplitude threshold and less than the preset demodulation threshold, so the demodulated signal is 0. Therefore, the third harmonic frequency can be used for demodulation and is selected as the candidate harmonic frequency.

[0112] In one implementation, the minimum value among all candidate harmonic frequencies is taken as the target harmonic frequency. In this case, the voltage amplitude of the target harmonic frequency is on the order of magnitude, which is convenient for calculation. Compared with demodulation using the voltage amplitude of other candidate harmonic frequencies, demodulation using the voltage amplitude of the target harmonic frequency is more accurate and can improve the subsequent demodulation efficiency.

[0113] In another implementation, all candidate harmonic frequencies are used as the target harmonic frequency. This can improve the accuracy of subsequent demodulation.

[0114] It should be noted that if the voltage amplitude corresponding to each odd-order harmonic frequency is greater than or equal to its corresponding preset amplitude threshold, in order to obtain the demodulated signal, the maximum value among all odd-order harmonic frequencies is taken as the target harmonic frequency.

[0115] S107: The receiver demodulates the signal based on the voltage amplitude corresponding to each target harmonic frequency and the preset demodulation threshold to obtain the demodulated signal.

[0116] In this step, after the receiving end determines the target harmonic frequency, it can demodulate the signal based on the voltage amplitude corresponding to each target harmonic frequency and the preset demodulation threshold to obtain the demodulated signal.

[0117] It should be noted that if the modulation method of the wireless signal to be transmitted is determined to be unipolar frequency doubling SPWM when the wireless signal to be transmitted is 1, and the modulation method of the wireless signal to be transmitted is determined to be unipolar SPWM when the wireless signal to be transmitted is 0, then after obtaining the demodulated signal using the above steps, if the demodulated signal is 1, it will be updated to 0; if the demodulated signal is 0, it will be updated to 1.

[0118] The wireless signal and power transmission method provided in this embodiment involves the transmitting end of a wireless transmission device determining the modulation scheme of the wireless signal to be transmitted based on its value, and then controlling the operation of the transmitting coil after modulation. The receiving end of the wireless transmission device acquires the voltage signal sequence to be demodulated through the receiving coil, performs Fourier transform processing to obtain the voltage amplitude corresponding to each odd-order harmonic frequency, and then determines the target harmonic frequency. Demodulation is then performed based on the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain the demodulated signal. This scheme modulates the wireless signal according to the determined modulation scheme at the transmitting end, allowing the receiving end to determine the target harmonic frequency from the odd-order harmonic frequencies for demodulation. Since the target harmonic frequency is an interference-free harmonic frequency, interference from interference sources can be reduced, improving the accuracy of the demodulated signal.

[0119] Figure 4 This is a flowchart illustrating a second embodiment of the wireless signal and power transmission method provided in this application. Based on the above embodiments, this application describes how the receiving end demodulates the signal according to the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold, resulting in a demodulated signal. For example... Figure 4 As shown, the wireless signal and power transmission method specifically includes the following steps:

[0120] S401: For each target harmonic frequency, demodulate according to the voltage amplitude corresponding to the target harmonic frequency and the preset demodulation threshold to obtain the candidate signal corresponding to the target harmonic frequency.

[0121] In this step, after the receiver determines the target harmonic frequency, for each target harmonic frequency, it demodulates it according to the voltage amplitude corresponding to the target harmonic frequency and the preset demodulation threshold to obtain the candidate signal corresponding to the target harmonic frequency.

[0122] Specifically, if the voltage amplitude corresponding to the target harmonic frequency is greater than or equal to the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulation signal corresponding to the target harmonic frequency is determined to be 1.

[0123] If the voltage amplitude corresponding to the target harmonic frequency is less than the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulation signal corresponding to the target harmonic frequency is determined to be 0.

[0124] S402: Determine whether the number of target harmonic frequencies is equal to 1; if the number of target harmonic frequencies is equal to 1, proceed to step S403; if the number of target harmonic frequencies is greater than 1, proceed to step S404.

[0125] In this step, after the receiver obtains the demodulated signal corresponding to each target harmonic frequency, in order to determine the demodulated signal, it is also necessary to determine whether the number of target harmonic frequencies is equal to 1.

[0126] S403: Use the candidate signal corresponding to the target harmonic frequency as the demodulated signal.

[0127] In this step, if the receiver determines that the number of target harmonic frequencies is equal to 1, no additional processing is required, and the candidate signal corresponding to the target harmonic frequency is used as the demodulated signal.

[0128] S404: Determine the demodulated signal based on the candidate signal corresponding to each target harmonic frequency.

[0129] In this step, if the receiver determines that the number of target harmonic frequencies is greater than 1, it needs to process the signal again to improve demodulation accuracy. The demodulated signal will be determined based on the candidate signal corresponding to each target harmonic frequency.

[0130] Since the candidate signal corresponding to each target harmonic frequency is 0 or 1, if the number of 1s in the candidate signals corresponding to all target harmonic frequencies is greater than or equal to the number of 0s, then the demodulated signal is determined to be 1.

[0131] If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is less than the number of 0s, then the demodulated signal is determined to be 0.

[0132] The wireless signal and power transmission method provided in this embodiment reduces the number of demodulation steps and improves demodulation efficiency by using the candidate signal corresponding to the target harmonic frequency as the demodulated signal when the number of target harmonic frequencies is equal to 1 (i.e., the minimum value among all candidate harmonic frequencies is the target harmonic frequency). Conversely, by using the most frequent identical signals among the candidate signals as the demodulated signal when the number of target harmonic frequencies is greater than 1 (i.e., all candidate harmonic frequencies are the target harmonic frequencies), demodulation accuracy is improved.

[0133] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0134] Figure 5 This is a schematic diagram of the structure of a first embodiment of the wireless signal and power transmission device provided in this application; the device can be integrated into the receiving end of the wireless transmission device in the above method embodiments, or it can be implemented through the receiving end of the wireless transmission device in the above method embodiments. Figure 5 As shown, the wireless transmission device 50 includes:

[0135] Processing module 51 is used for:

[0136] The sequence of voltage signals to be demodulated is acquired by the receiving coil;

[0137] Perform Fourier transform on the voltage signal sequence to be demodulated to obtain the voltage amplitude corresponding to each odd harmonic frequency;

[0138] The target harmonic frequency is determined based on the preset amplitude threshold and voltage amplitude corresponding to each odd-order harmonic frequency;

[0139] The demodulation module 52 is used to demodulate the signal based on the voltage amplitude corresponding to each target harmonic frequency and the preset demodulation threshold to obtain the demodulated signal.

[0140] Furthermore, the processing module 51 is specifically used for:

[0141] For each odd-numbered harmonic frequency, if the voltage amplitude corresponding to the odd-numbered harmonic frequency is less than the preset amplitude threshold corresponding to the odd-numbered harmonic frequency, then the odd-numbered harmonic frequency is selected as the candidate harmonic frequency.

[0142] Determine the target harmonic frequency based on all candidate harmonic frequencies;

[0143] Specifically, for each odd-order harmonic frequency, the preset amplitude threshold corresponding to the odd-order harmonic frequency is greater than the preset demodulation threshold corresponding to the odd-order harmonic frequency.

[0144] Furthermore, the processing module 51 is specifically used for:

[0145] The minimum value among all candidate harmonic frequencies is taken as the target harmonic frequency; or,

[0146] All candidate harmonic frequencies are used as target harmonic frequencies.

[0147] Furthermore, the demodulation module 52 is specifically used for:

[0148] For each target harmonic frequency, demodulation is performed based on the voltage amplitude corresponding to the target harmonic frequency and the preset demodulation threshold to obtain the candidate signal corresponding to the target harmonic frequency;

[0149] If the number of target harmonic frequencies is equal to 1, then the candidate signal corresponding to the target harmonic frequency is used as the demodulated signal.

[0150] If the number of target harmonic frequencies is greater than 1, then the demodulated signal is determined based on the candidate signal corresponding to each target harmonic frequency.

[0151] Furthermore, the demodulation module 52 is specifically used for:

[0152] If the voltage amplitude corresponding to the target harmonic frequency is greater than or equal to the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulation signal corresponding to the target harmonic frequency is determined to be 1;

[0153] If the voltage amplitude corresponding to the target harmonic frequency is less than the preset demodulation threshold corresponding to the target harmonic frequency, then the demodulated signal corresponding to the target harmonic frequency is determined to be 0.

[0154] Furthermore, the candidate signal corresponding to each target harmonic frequency is 0 or 1. The demodulation module 52 is specifically used for:

[0155] If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is greater than or equal to the number of 0s, then the demodulated signal is determined to be 1;

[0156] If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is less than the number of 0s, then the demodulated signal is determined to be 0.

[0157] The wireless transmission device provided in this embodiment is used to execute the technical solution of the receiving end of the wireless transmission device in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0158] Figure 5 This is a schematic diagram of the structure of a second embodiment of the wireless signal and power transmission device provided in this application; the device can be integrated into the transmitting end of the wireless transmission device in the above method embodiments, or it can be implemented through the transmitting end of the wireless transmission device in the above method embodiments. Figure 6 As shown, the wireless transmission device 60 includes:

[0159] The processing module 61 is used to determine the modulation method of the wireless signal to be transmitted based on the acquired value of the wireless signal to be transmitted.

[0160] The modulation module 62 is used to modulate the wireless signal to be transmitted according to the modulation method of the wireless signal to be transmitted, so as to obtain a control signal;

[0161] The control module 63 is also used to control the operation of the transmitting coil according to the control signal.

[0162] Furthermore, the processing module 61 is specifically used for:

[0163] If the wireless signal to be transmitted is 1, then the modulation method of the wireless signal to be transmitted is determined to be unipolar sinusoidal pulse width modulation.

[0164] If the wireless signal to be transmitted is 0, then the modulation method of the wireless signal to be transmitted is determined to be unipolar frequency-doubled sine wave pulse width modulation.

[0165] The wireless transmission device provided in this embodiment is used to execute the technical solution of the transmitting end of the wireless transmission device in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0166] Figure 7This is a schematic diagram of the structure of a wireless transmission device provided in this application. Figure 7 As shown, the wireless transmission device 700 includes:

[0167] Transmitter 701 and receiver 702.

[0168] The transmitter 701 includes a first processor 703, a first memory 704, and a transmitting coil 705;

[0169] The receiver 702 includes a second processor 706, a second memory 707, and a receiving coil 708;

[0170] The first memory 704 is used to store the executable instructions of the first processor 703;

[0171] The second memory 707 is used to store the executable instructions of the second processor 706;

[0172] The first processor 703 is configured to execute the technical solution of the transmitting end of the wireless transmission device in any of the foregoing method embodiments by executing executable instructions.

[0173] The second processor configuration 706 is a technical solution for executing the receiving end of the wireless transmission device in any of the foregoing method embodiments by executing executable instructions.

[0174] Optionally, the first memory 704 can be either standalone or integrated with the first processor 703.

[0175] Optionally, when the first memory 704 is a device independent of the first processor 703, the transmitting end 701 may further include:

[0176] The first bus 709, the first memory 704, and the transmitting coil 705 are connected to the first processor 703 through the first bus 709 and complete mutual communication.

[0177] Optionally, the second memory 707 can be either standalone or integrated with the second processor 706.

[0178] Optionally, when the second memory 707 is a device independent of the second processor 706, the receiver 702 may further include:

[0179] The second bus 710, the second memory 707, and the receiving coil 708 are connected to the second processor 706 through the second bus 710 and complete mutual communication.

[0180] The memory may include random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device.

[0181] A bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, only one thick line is used in the diagram, but this does not imply that there is only one bus or one type of bus.

[0182] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0183] The wireless transmission device is used to execute the technical solution of the wireless transmission device in any of the aforementioned method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0184] This application also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the technical solutions provided in any of the foregoing method embodiments.

[0185] This application also provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the technical solutions provided in any of the foregoing method embodiments.

[0186] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0187] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for wireless signal and power transmission, characterized in that, The method is applied to a receiving end of a wireless transmission device, and the method comprises the following steps: A sequence of voltage signals to be demodulated is obtained through a receiving coil; A Fourier transform process is performed on the sequence of voltage signals to be demodulated, so as to obtain voltage amplitudes corresponding to each odd harmonic frequency; A target harmonic frequency is determined according to a preset amplitude threshold value corresponding to each odd harmonic frequency and the voltage amplitude; A demodulated signal is obtained by demodulating the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold value.

2. The method of claim 1, wherein, The method for determining the target harmonic frequency according to the preset amplitude threshold value corresponding to each odd harmonic frequency and the voltage amplitude comprises the following steps: For each odd harmonic frequency, if the voltage amplitude corresponding to the odd harmonic frequency is less than the preset amplitude threshold value corresponding to the odd harmonic frequency, the odd harmonic frequency is taken as a candidate harmonic frequency; A target harmonic frequency is determined according to all candidate harmonic frequencies; For each odd harmonic frequency, the preset amplitude threshold value corresponding to the odd harmonic frequency is greater than the preset demodulation threshold value corresponding to the odd harmonic frequency.

3. The method of claim 2, wherein, The method for determining the target harmonic frequency according to all candidate harmonic frequencies comprises the following steps: The minimum value of all candidate harmonic frequencies is taken as the target harmonic frequency; or All candidate harmonic frequencies are taken as the target harmonic frequency.

4. The method of claim 1, wherein, The method for demodulating the voltage amplitude corresponding to each target harmonic frequency and the preset demodulation threshold value to obtain the demodulated signal comprises the following steps: For each target harmonic frequency, a candidate signal corresponding to the target harmonic frequency is obtained by demodulating the voltage amplitude corresponding to the target harmonic frequency and the preset demodulation threshold value; If the number of target harmonic frequencies is equal to 1, the candidate signal corresponding to the target harmonic frequency is taken as the demodulated signal; If the number of target harmonic frequencies is greater than 1, a demodulated signal is determined according to the candidate signal corresponding to each target harmonic frequency.

5. The method of claim 4, wherein, The method for demodulating the voltage amplitude corresponding to the target harmonic frequency and the preset demodulation threshold value to obtain the candidate signal corresponding to the target harmonic frequency comprises the following steps: If the voltage amplitude corresponding to the target harmonic frequency is greater than or equal to the preset demodulation threshold value corresponding to the target harmonic frequency, it is determined that the demodulation signal corresponding to the target harmonic frequency is 1; If the voltage amplitude corresponding to the target harmonic frequency is less than the preset demodulation threshold value corresponding to the target harmonic frequency, it is determined that the demodulation signal corresponding to the target harmonic frequency is 0.

6. The method of claim 4, wherein, The candidate signal corresponding to each target harmonic frequency is 0 or 1, and the method for determining the demodulated signal according to the candidate signal corresponding to each target harmonic frequency comprises the following steps: If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is greater than or equal to the number of 0s, it is determined that the demodulated signal is 1; If the number of 1s in the candidate signals corresponding to all target harmonic frequencies is less than the number of 0s, it is determined that the demodulated signal is 0.

7. A method of wireless signal and power transfer, the method comprising: The method is applied to a sending end of a wireless transmission device, and the method comprises the following steps: A modulation mode of a to-be-sent wireless signal is determined according to a numerical value of the to-be-sent wireless signal; A control signal is obtained by modulating the to-be-sent wireless signal according to the modulation mode of the to-be-sent wireless signal. Control the operation of the transmitting coil according to the control signal.

8. The method of claim 7, wherein, The modulation mode of the to-be-sent wireless signal is determined according to the obtained numerical value of the to-be-sent wireless signal, including: If the to-be-sent wireless signal is 1, it is determined that the modulation mode of the to-be-sent wireless signal is a unipolar sine wave pulse width modulation mode; If the to-be-sent wireless signal is 0, it is determined that the modulation mode of the to-be-sent wireless signal is a unipolar frequency-doubled sine wave pulse width modulation mode.

9. A wireless signal and power transfer device, characterized by, Including: The processing module is used for: Obtaining a to-be-demodulated voltage signal sequence through the receiving coil; Performing Fourier transform processing on the to-be-demodulated voltage signal sequence to obtain a voltage amplitude corresponding to each odd harmonic frequency; Determining a target harmonic frequency according to a preset amplitude threshold corresponding to each odd harmonic frequency and the voltage amplitude; The demodulation module is used for demodulating according to the voltage amplitude corresponding to each target harmonic frequency and a preset demodulation threshold to obtain a demodulated signal.

10. A wireless signal and power transfer device, characterized by, Including: The processing module is used for determining the modulation mode of the to-be-sent wireless signal according to the obtained numerical value of the to-be-sent wireless signal; The modulation module is used for modulating the to-be-sent wireless signal according to the modulation mode of the to-be-sent wireless signal to obtain a control signal; The control module is further used for controlling the operation of the transmitting coil according to the control signal.

11. A wireless transmitting device, comprising: Including: A sending end and a receiving end; The sending end includes a first processor, a first memory, and a transmitting coil; The receiving end includes a second processor, a second memory, and a receiving coil; The first memory is used for storing executable instructions of the first processor; The second memory is used for storing executable instructions of the second processor; The first processor is configured to execute the wireless signal and electric energy transmission method of any one of claims 1 to 6 by executing the executable instructions; The second processor is configured to execute the wireless signal and electric energy transmission method of any one of claims 7 to 8 by executing the executable instructions.

12. A readable storage medium, having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the wireless signal and electric energy transmission method of any one of claims 1 to 6 or any one of claims 7 to 8.

13. A computer program product, characterised in that, The computer program is executed by the processor to implement the wireless signal and electric energy transmission method of any one of claims 1 to 6 or any one of claims 7 to 8. The computer program is executed by the processor to implement the wireless signal and electric energy transmission method of any one of claims 1 to 6 or any one of claims 7 to 8.

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