Phase tracking wireless energy charging device and method

Abstract

The invention relates to a phase tracking wireless energy charging device and a phase tracking wireless energy charging method, and relates to the technical field of communication. The phase tracking wireless energy charging device comprises wireless charging equipment and charged equipment, the charged equipment regularly sends a first pilot signal and a second pilot signal to the plurality of energy emission units and the energy emission control unit, wherein the frequency of the first pilot signal is smaller than that of the second pilot signal; the frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal, and determining a third phase difference corresponding to the local oscillation signal by combining the first phase difference and the second phase difference; and each energy emission unit performs phase shift on the received local oscillation signal, delays the calculated third phase difference, and sends the local oscillation signal after phase shift to the charged device. The invention provides a wireless charging device in which the frequency of a retroreflection signal is different from that of a pilot signal.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a phase tracking wireless charging device and a phase tracking wireless charging method. Background Art

[0002] Microwave wireless charging technology uses microwaves as a transmission medium to achieve wireless transmission of electrical energy in space and has a very wide range of applications.

[0003] One of the more commonly used microwave wireless charging technologies is the reverse reflection wireless charging technology. In this technology, the charged device sends a pilot signal to the charging device, and the charging device amplifies the received signal and then reversely reflects it to the charged device, achieving the effect of energy beam tracking, which has the characteristics of fast tracking speed and low algorithm complexity.

[0004] However, in practical applications, the reverse reflection wireless charging technology requires that the frequency of the reverse reflection signal be the same as the frequency of the pilot signal. This requirement is theoretically feasible, but very difficult to implement in actual products.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] The purpose of the present disclosure is to provide a phase tracking wireless charging device and a phase tracking wireless charging method, so as to provide a wireless charging device in which the frequency of the retroreflection signal is different from the frequency of the pilot signal.

[0007] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present invention.

[0008] According to a first aspect of the present disclosure, a phase tracking wireless charging device is provided, comprising: a wireless charging device and a charged device; wherein the wireless charging device comprises a plurality of energy transmitting units and an energy transmitting control unit, each of the energy transmitting units is connected to the energy transmitting control unit; the charged device periodically sends a first pilot signal and a second pilot signal to the plurality of energy transmitting units and the energy transmitting control unit, the frequency of the first pilot signal being less than the frequency of the second pilot signal; the energy transmitting control unit receives the first pilot signal and sends it to each of the energy transmitting units, and each of the energy transmitting units calculates a first phase difference according to the first pilot signal received by itself and the first pilot signal sent by the energy transmitting control unit. ; The energy transmission control unit receives the second pilot signal and sends it to each of the energy transmission units. Each of the energy transmission units calculates the second phase difference based on the second pilot signal received by itself and the second pilot signal sent by the energy transmission control unit; the energy transmission control unit sends a local oscillation signal to each of the energy transmission units. The frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal. The third phase difference corresponding to the local oscillation signal is determined by combining the first phase difference and the second phase difference; each of the energy transmission units phase-shifts the received local oscillation signal, delays the calculated third phase difference, and sends the phase-shifted local oscillation signal to the charged device.

[0009] In an exemplary embodiment of the present disclosure, the third phase difference is:

[0010]

[0011] in, is the first phase difference, is the second phase difference, f 1 is the frequency of the first pilot signal, f 2 is the frequency of the second pilot signal, f 0 is the frequency of the local oscillator signal.

[0012] In an exemplary embodiment of the present disclosure, the energy transmission control unit controls each of the energy transmission units to calculate the first phase difference and the second phase difference by sending a start phase calculation signal; the energy transmission control unit controls each of the energy transmission units to shift the phase of the local oscillation signal by sending a start transmission signal, and sends the phase-shifted local oscillation signal to the charged device.

[0013] In an exemplary embodiment of the present disclosure, the energy transmission control unit includes: a first microprocessor, a first radio frequency oscillator, a first antenna and a first radio frequency switch; wherein the first radio frequency oscillator and the first radio frequency switch are respectively connected to the first microprocessor; the first radio frequency switch selectively connects the first antenna and the first radio frequency oscillator, and when the first microprocessor sends the start phase calculation signal, the first radio frequency switch is connected to the first antenna to send the first pilot signal or the second pilot signal to the energy transmission unit; when the first microprocessor sends the start transmission signal, the first radio frequency switch is connected to the first radio frequency oscillator to send the local oscillation signal to the energy transmission unit.

[0014] In an exemplary embodiment of the present disclosure, the energy transmitting unit includes: a second microprocessor, a phase detector, a phase shifter, a second antenna, a second radio frequency switch and a third radio frequency switch; wherein the phase detector, the phase shifter, the second radio frequency switch and the third radio frequency switch are respectively connected to the second microprocessor; one side of the second radio frequency switch is connected to the second antenna, and the other side is selectively connected to the phase detector and the phase shifter, one side of the third radio frequency switch is connected to the first radio frequency switch, and the other side is selectively connected to the phase detector and the phase shifter, and the second microprocessor is connected to the first microprocessor for receiving the start phase calculation signal or the start transmission signal.

[0015] In an exemplary embodiment of the present disclosure, the charged device includes: a third microprocessor, a first pilot signal generator, a second pilot signal generator, a fourth radio frequency switch, a microwave energy collection module, a third antenna and a fourth antenna; wherein the microwave energy collection module supplies power to the third microprocessor, the first pilot signal generator and the second pilot signal generator; the third antenna is connected to the microwave energy collection module for collecting energy for the microwave energy collection module; the fourth radio frequency switch is connected to the third microprocessor, one side of the fourth radio frequency switch is connected to the fourth antenna, and the other side is selectively connected to the first pilot signal generator and the second pilot signal generator.

[0016] In an exemplary embodiment of the present disclosure, the charged device further includes: a standard energy output interface; the standard energy output interface is connected to the microwave energy collection module.

[0017] According to a second aspect of the present disclosure, a phase tracking wireless charging method is provided, which is applied to the phase tracking wireless charging device as described above, wherein the phase tracking wireless charging device includes a wireless charging device and a charged device, wherein the wireless charging device includes multiple energy transmitting units and an energy transmitting control unit, and each of the energy transmitting units is connected to the energy transmitting control unit. The method includes: periodically sending a first pilot signal and a second pilot signal to the multiple energy transmitting units and the energy transmitting control unit through the charged device, wherein the frequency of the first pilot signal is less than the frequency of the second pilot signal; after receiving the first pilot signal through the energy transmitting control unit, sending it to each of the energy transmitting units, wherein each of the energy transmitting units sends a first pilot signal to the energy transmitting control unit according to the first pilot signal received by itself. The first phase difference is calculated based on the first pilot signal; the second pilot signal is received by the energy transmission control unit and then sent to each of the energy transmission units, and each of the energy transmission units calculates the second phase difference based on the second pilot signal received by itself and the second pilot signal sent by the energy transmission control unit; the local oscillation signal is sent to each of the energy transmission units through the energy transmission control unit, the frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal, and the third phase difference corresponding to the local oscillation signal is determined in combination with the first phase difference and the second phase difference; the received local oscillation signal is phase-shifted by each of the energy transmission units, the calculated third phase difference is delayed, and the local oscillation signal after phase shift is sent to the charged device.

[0018] The technical solution provided by the present disclosure may have the following beneficial effects:

[0019] In the phase tracking wireless charging device provided by the exemplary embodiment of the present disclosure, the frequency of the local oscillation signal is different from the frequency of the first pilot signal and the second pilot signal, which is equivalent to the frequency of the reverse reflection signal being different from the frequency of the pilot signal, thereby reducing the difficulty of implementation in the actual product, which is not only feasible in theory, but also feasible in the actual product. In addition, the frequency of the reverse reflection signal is different from the frequency of the pilot signal, which can avoid the problem of interference between signals and provide convenience for product debugging. The new phase energy tracking method with different reverse reflection frequency and pilot signal frequency proposed in the exemplary embodiment of the present disclosure can make the pilot signal receiving antenna and the reverse reflection antenna the same antenna, that is, the antenna receiving the first pilot signal and the second pilot signal is the same antenna as the antenna sending the local oscillation signal, which greatly reduces the area of ​​the antenna and is suitable for far-field and near-field situations. The method is simple, practical and easy to implement. Furthermore, the phase energy tracking method provided by the exemplary embodiment of the present disclosure does not require the charged device to send the pilot signal all the time, and it can digitally store and memorize the phase of the pilot signal. In one cycle, the pilot signal sending time can be very short, and it can be in a resting state most of the time, so that the energy consumption burden of the phase tracking wireless charging device is very low.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of a phase tracking wireless charging device according to an exemplary embodiment of the present disclosure is shown;

[0023] Figure 2 Schematically shows a schematic structural diagram of an energy emission control unit according to an exemplary embodiment of the present disclosure;

[0024] Figure 3 Schematically shows a structural diagram of an energy emission unit according to an exemplary embodiment of the present disclosure;

[0025] Figure 4 A schematic diagram of the structure of a charged device according to an exemplary embodiment of the present disclosure is shown;

[0026] Figure 5 A flow chart of a phase tracking wireless charging method according to an exemplary embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0028] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0029] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or these functional entities or parts of functional entities may be implemented in one or more software hardened modules, or these functional entities may be implemented in different networks and / or processor devices and / or microprocessor devices.

[0030] Embodiment 1

[0031] The present disclosure provides a phase tracking wireless charging device. Figure 1 , showing a schematic diagram of the structure of the phase tracking wireless charging device in an embodiment of the present disclosure.

[0032] like Figure 1 As shown, the phase tracking wireless charging device may include: a wireless charging device 100 and a charged device 200. The wireless charging device 100 includes a plurality of energy transmitting units 101 and an energy transmitting control unit 102, and each energy transmitting unit 101 is connected to the energy transmitting control unit 102.

[0033] It should be noted that the number of energy transmission units 101 can be set according to actual needs. For example, it can be 4 energy transmission units 101, or it can be 16 energy transmission units 101, etc. Such a setting can make the phase tracking wireless charging device disclosed in the present invention have good scalability. According to actual needs, only the number of energy transmission units 101 needs to be increased or decreased, which will not affect other units and the entire circuit framework will not change.

[0034] In actual applications, the charged device 200 can periodically send the first pilot signal and the second pilot signal to multiple energy transmitting units 101 and the energy transmitting control unit 102, that is, each energy transmitting unit 101 can receive the first pilot signal and the second pilot signal, and the energy transmitting control unit 102 can also receive the first pilot signal and the second pilot signal. 1 is less than the frequency f of the second pilot signal 2 .

[0035] In practical applications, both the first pilot signal and the second pilot signal are used to guide the wireless charging device 100 to charge the charged device 200, wherein the first pilot signal can be sent before the second pilot signal or after the second pilot signal, and the exemplary embodiments of the present disclosure do not specifically limit this.

[0036] In the exemplary embodiment of the present disclosure, after receiving the first pilot signal, the energy transmission control unit 102 may send it to each energy transmission unit 101, which may be specifically performed as follows: Figure 1 The RF (Radio Frequency) signal port shown is sent to the energy transmitting unit 101.

[0037] After each energy transmitting unit 101 receives the first pilot signal sent by the energy transmitting control unit 102, it calculates the first phase difference according to the first pilot signal received by itself and the first pilot signal sent by the energy transmitting control unit 102.

[0038] Specifically, the first phase difference It is calculated by the phase detector in the energy transmitting unit 101. When two first pilot signals, namely the first pilot signal received by the energy transmitting unit 101 itself and the first pilot signal sent by the energy transmitting control unit 102, are input into the phase detector, the phase detector will automatically calculate the first phase difference The phase detector is an existing device. In the exemplary embodiment of the present disclosure, the phase detector performs a first phase difference The specific calculation process is not described in detail.

[0039] In practical applications, each energy transmitting unit 101 calculates the first phase difference The energy transmission control unit 102 controls the energy transmission control unit 101 by sending a start phase calculation signal. The energy transmission unit 101 starts calculating the first phase difference only after receiving the start phase calculation signal sent by the energy transmission control unit 102. Specifically, the energy emission control unit 102 can be Figure 1 The start signal port shown sends a start phase calculation signal to the energy transmitting unit 101 .

[0040] That is to say, the energy transmission control unit 102 is connected to each energy transmission unit 101 via the RF signal port and the start signal port.

[0041] In the exemplary embodiment of the present disclosure, after receiving the second pilot signal, the energy transmission control unit 102 may send it to each energy transmission unit 101, which may be specifically performed as follows: Figure 1 The RF signal port shown is sent to the energy transmitting unit 101.

[0042] After each energy transmitting unit 101 receives the second pilot signal sent by the energy transmitting control unit 102, it calculates the second phase difference according to the second pilot signal received by itself and the second pilot signal sent by the energy transmitting control unit 102.

[0043] Specifically, the second phase difference is calculated by the phase detector in the energy transmitting unit 101. When two second pilot signals, namely the second pilot signal received by the energy transmitting unit 101 itself and the second pilot signal sent by the energy transmitting control unit 102, are input into the phase detector, the phase detector will automatically calculate the second phase difference The phase detector is an existing device. In the exemplary embodiment of the present disclosure, the phase detector is used to detect the second phase difference. The specific calculation process is not described in detail.

[0044] In practical applications, similarly, each energy transmitting unit 101 calculates the second phase difference The energy transmission control unit 102 is also controlled by sending a start phase calculation signal. The energy transmission unit 101 starts calculating the second phase difference only after receiving the start phase calculation signal sent by the energy transmission control unit 102. Specifically, the energy emission control unit 102 can be Figure 1 The start signal port shown sends the start phase calculation signal to the energy transmitting unit 101. The energy transmitting unit 101 starts controlling the phase detector to calculate the second phase difference according to the start phase calculation signal.

[0045] In the exemplary embodiment of the present disclosure, in addition to sending the first pilot signal and the second pilot signal to the energy transmitting unit 101, the energy transmitting control unit 102 will also send the local oscillation signal generated by itself to each energy transmitting unit 101, wherein the frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal, that is, in the exemplary embodiment of the present disclosure, the frequency of the reverse reflection signal (i.e., the frequency of the local oscillation signal) is different from the frequency of the pilot signal (i.e., the frequency of the first pilot signal and the frequency of the second pilot signal) is different, and this condition reduces the difficulty of implementation in the actual product, and is not only feasible in theory, but also feasible in the actual product. In addition, the frequency of the reverse reflection signal is different from the frequency of the pilot signal, which can avoid the problem of interference between signals and provide convenience for product debugging.

[0046] In the exemplary embodiment of the present disclosure, the frequency f of the local oscillation signal is combined with 0 , the frequency f of the first pilot signal 1 , the frequency f of the second pilot signal 2 , the first phase difference and the second phase difference The third phase difference corresponding to the local oscillation signal can be determined The specific calculation formula is shown in the following formula (1):

[0047]

[0048] After determining the third phase difference Afterwards, each energy transmitting unit 101 can perform phase shifting on the received local oscillation signal, and use the phase shifter to delay the local oscillation signal by the third phase difference calculated. The phase-shifted local oscillation signal is amplified and sent to the charged device 200. The phases of the local oscillation signals sent by the energy transmitting units 101 received by the charged device 200 are positively superimposed, thereby maximizing the energy received by the charged device 200, thereby achieving the purpose of phase tracking required by the embodiment of the present disclosure.

[0049] In addition, the prior art also proposes a solution in which the pilot signal frequency and the reverse reflection frequency are different. In order to compensate for the phase error caused by the different frequencies, the pilot signal receiving antenna and the reverse reflection antenna are required to be two sets of independent antennas, and the antenna spacing of the two sets of antenna arrays is different. This solution increases the number of antennas, thereby increasing the size of the antenna. However, small size is an important competitive advantage of products in the consumer market. In addition, this solution is only suitable for far-field wireless power supply scenarios, not near-field microwave power supply scenarios.

[0050] The new phase energy tracking method for different retroreflection frequencies and pilot signal frequencies proposed in the exemplary embodiment of the present disclosure can make the pilot signal receiving antenna and the retroreflection antenna the same antenna, that is, the antenna receiving the first pilot signal and the second pilot signal and the antenna sending the local oscillation signal are the same antenna, which greatly reduces the area of ​​the antenna and is suitable for far-field and near-field situations. The method is simple, practical, and easy to implement.

[0051] Furthermore, the phase energy tracking method provided in the exemplary embodiment of the present disclosure does not require the charged device to send a pilot signal all the time. It can digitally store and memorize the phase of the pilot signal. Within one cycle, the pilot signal sending time can be very short, and it can be in a resting state most of the time, so that the energy consumption burden of the phase tracking wireless charging device is very low.

[0052] It should be noted that, in actual applications, the first pilot signal and the second pilot signal are sent, the first phase difference and the second phase difference are calculated, and then the local oscillation signal is sent, the corresponding third phase difference is calculated, and then the local oscillation signal is phase-shifted, amplified and sent to the charged device for one cycle. After that, the above actions can be repeated for the second cycle, and so on, and the charged device can be periodically phase-tracked and charged.

[0053] In practical applications, each energy transmission unit 101 performs phase shifting on the local oscillation signal and sends the phase-shifted local oscillation signal to the charged device 200, which is controlled by the energy transmission control unit 102 sending a start transmission signal. Specifically, the energy transmission control unit 102 can be as follows: Figure 1 The start signal port shown sends a start transmission signal to the energy transmission unit 101. The energy transmission unit 101 starts to control the phase shifter to shift the phase of the local oscillation signal according to the start transmission signal.

[0054] Reference Figure 2 As shown, the energy emission control unit 102 provided in the exemplary embodiment of the present disclosure may include: a first microprocessor 201, a first RF oscillator 202, a first antenna 203 and a first RF switch 204. Among them, the first RF oscillator 202 is connected to the first microprocessor 201, and the first RF switch 204 is also connected to the first microprocessor 201 (not shown in the figure). The operation of the first RF oscillator 202 is controlled by the first microprocessor 201, and the opening and closing of the first RF switch 204 is also controlled by the first microprocessor 201.

[0055] like Figure 2As shown, the first RF switch 204 selectively connects the first antenna 203 and the first RF oscillator 202. When the first microprocessor 201 sends a start phase calculation signal, the first RF switch 204 is connected to the first antenna 203 to send a first pilot signal or a second pilot signal to the energy transmitting unit 101.

[0056] When the first microprocessor 201 sends a start transmission signal, the first RF switch 204 is connected to the first RF oscillator 202 to send a local oscillation signal to the energy transmitting unit 101 .

[0057] In actual applications, the energy transmission control unit 102 also includes a first low noise amplifier 205, which is arranged between the first RF switch 204 and the first antenna 203. The first low noise amplifier 205 is used to amplify the first pilot signal and the second pilot signal. The amplified first pilot signal and the second pilot signal are used to send to the energy transmission unit 101.

[0058] Reference Figure 3 As shown, the energy transmitting unit 101 provided in the exemplary embodiment of the present disclosure may include: a second microprocessor 301, a phase detector 302, a phase shifter 303, a second antenna 304, a second RF switch 305 and a third RF switch 306, wherein the phase detector 302, the phase shifter 303, the second RF switch 305 and the third RF switch 306 are respectively connected to the second microprocessor 301, the opening and closing of the second RF switch 305 is controlled by the second microprocessor 301, the opening and closing of the third RF switch 306 is also controlled by the second microprocessor 301, and the working states of the phase detector 302 and the phase shifter 303 are also controlled by the second microprocessor 301.

[0059] One side of the second RF switch 305 is connected to the second antenna 304, and the other side is selectively connected to the phase detector 302 and the phase shifter 303. One side of the third RF switch 306 is connected to the first RF switch 204, and the other side is selectively connected to the phase detector 302 and the phase shifter 303. When the first microprocessor 201 sends a start phase calculation signal to the second microprocessor 301, the second microprocessor 301 controls the second RF switch 305 and the third RF switch 306 to select connection with the phase detector 302. After the phase detector 302 receives the first pilot signal received by the second antenna 304 and the first pilot signal sent by the energy transmission control unit 102, it starts to calculate the first phase difference corresponding to the first pilot signal.

[0060] After the first phase difference is calculated, the phase detector 302 receives the second pilot signal received by the second antenna 304 and the second pilot signal sent by the energy transmission control unit 102, and starts to calculate the second phase difference corresponding to the second pilot signal.

[0061] After calculating the first phase difference and the second phase difference, the phase detector 302 sends the results of the first phase difference and the second phase difference to the second microprocessor 301, and the second microprocessor 301 calculates the third phase difference.

[0062] When the first microprocessor 201 sends a start transmission signal to the second microprocessor 301, the second microprocessor 301 controls the second RF switch 305 and the third RF switch 306 to select the connection to the phase shifter 303. At the same time, the first microprocessor 201 controls the first RF switch 204 to select the connection to the first RF oscillator 202. The third RF switch 306 receives the local oscillation signal sent from the first RF switch 204. The phase shifter 303 receives the local oscillation signal and shifts the phase of the local oscillation signal according to the third phase difference determined by the second microprocessor 301. After the phase shift, the local oscillation signal is sent to the charged device 200 through the second antenna 304. It can be seen that the antenna that receives the first pilot signal and the second pilot signal and the antenna that sends the local oscillation signal are both the second antenna 304, and the exemplary embodiment of the present disclosure greatly reduces the area of ​​the antenna.

[0063] It should be noted that the start signal in the figure refers to the start phase calculation signal and the start transmission signal.

[0064] like Figure 3 As shown, in actual application, the energy transmitting unit 101 may further include: a second low noise amplifier 307 and a power amplifier 308, the second low noise amplifier 307 is used to amplify the first pilot signal and the second pilot signal received by the second antenna 304, and the power amplifier 308 is used to amplify the local oscillation signal after phase shifting. The second low noise amplifier 307 is arranged between the second RF switch 305 and the phase detector 302, and the power amplifier 308 is arranged between the second RF switch 305 and the phase shifter 303.

[0065] Reference Figure 4 As shown, the charged device 200 provided in the exemplary embodiment of the present disclosure may include: a third microprocessor 401, a first pilot signal generator 402, a second pilot signal generator 403, a fourth radio frequency switch 404, a microwave energy collection module 405, a third antenna 406 and a fourth antenna 407. The microwave energy collection module 405 is used to supply power to the third microprocessor 401, the first pilot signal generator 402 and the second pilot signal generator 403, and the third antenna 406 is connected to the microwave energy collection module 405 to collect energy for the microwave energy collection module 405.

[0066] The fourth RF switch 404 is connected to the third microprocessor 401, and the opening and closing of the fourth RF switch 404 is controlled by the third microprocessor 401. One side of the fourth RF switch 404 is connected to the fourth antenna 407, and the other side is selectively connected to the first pilot signal generator 402 and the second pilot signal generator 403. Among them, the first pilot signal generator 402 is used to generate a first pilot signal, and the second pilot signal generator 403 is used to generate a second pilot signal. When the third microprocessor 401 controls the fourth RF switch 404 to select the connection to the first pilot signal generator 402, the charged device 200 sends the first pilot signal to the wireless charging device, and when the third microprocessor 401 controls the fourth RF switch 404 to select the connection to the second pilot signal generator 403, the charged device 200 sends the second pilot signal to the wireless charging device.

[0067] In the exemplary embodiment of the present disclosure, the charged device 200 further includes: a standard energy output interface 408, which is connected to the microwave energy collection module 405 and is used to connect an external device so that the charged device 200 can power the external device.

[0068] In the phase tracking wireless charging device provided by the exemplary embodiment of the present disclosure, the frequency of the local oscillation signal is different from the frequency of the first pilot signal and the second pilot signal, which is equivalent to the frequency of the reverse reflection signal being different from the frequency of the pilot signal, thereby reducing the difficulty of implementation in actual products. It is not only feasible in theory, but also feasible in actual products. In addition, the frequency of the reverse reflection signal is different from the frequency of the pilot signal, which can avoid the problem of interference between signals and facilitate product debugging.

[0069] The new phase energy tracking method for different retroreflection frequencies and pilot signal frequencies proposed in the exemplary embodiments of the present disclosure can make the pilot signal receiving antenna and the retroreflection antenna the same antenna, that is, the antenna receiving the first pilot signal and the second pilot signal and the antenna sending the local oscillation signal are the same antenna, which greatly reduces the area of ​​the antenna and is suitable for far-field and near-field situations. The method is simple, practical, and easy to implement.

[0070] Furthermore, the phase energy tracking method provided in the exemplary embodiment of the present disclosure does not require the charged device to send a pilot signal all the time. It can digitally store and memorize the phase of the pilot signal. Within one cycle, the pilot signal sending time can be very short, and it can be in a resting state most of the time, so that the energy consumption burden of the phase tracking wireless charging device is very low.

[0071] Embodiment 2

[0072] The disclosed embodiment also provides a phase tracking wireless charging method, referring to Figure 5 The phase tracking wireless charging method can be applied to the phase tracking wireless charging device in the above embodiment, and can specifically include the following steps:

[0073] Step S510: The charged device periodically sends a first pilot signal and a second pilot signal to a plurality of energy transmitting units and an energy transmitting control unit, wherein the frequency of the first pilot signal is lower than the frequency of the second pilot signal.

[0074] Step S520: After receiving the first pilot signal through the energy transmission control unit, it is sent to each energy transmission unit, and each energy transmission unit calculates a first phase difference based on the first pilot signal received by itself and the first pilot signal sent by the energy transmission control unit.

[0075] Step S530: After receiving the second pilot signal through the energy transmission control unit, it is sent to each energy transmission unit, and each energy transmission unit calculates the second phase difference according to the second pilot signal received by itself and the second pilot signal sent by the energy transmission control unit.

[0076] Step S540: Send a local oscillation signal to each energy transmitting unit through the energy transmitting control unit. The frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal. The third phase difference corresponding to the local oscillation signal is determined by combining the first phase difference and the second phase difference.

[0077] Step S550: Phase-shift the received local oscillation signal through each energy transmitting unit, delay the calculated third phase difference, and send the phase-shifted local oscillation signal to the charged device.

[0078] Among them, the specific principle of the above-mentioned phase tracking wireless charging method has been described in detail in the above-mentioned embodiment and will not be repeated here.

[0079] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc. In the embodiment of the present disclosure, the computer may include the device described above.

[0080] Although the present disclosure is described herein in conjunction with various embodiments, in the process of implementing the claimed disclosure, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0081] Although the present disclosure has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present disclosure. Accordingly, this specification and the drawings are merely exemplary illustrations of the present disclosure as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present disclosure. Obviously, those skilled in the art may make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A phase tracking wireless charging device, characterized in that: include: Wireless charging device and charged device; wherein, The wireless charging device comprises a plurality of energy transmitting units and an energy transmitting control unit, and each of the energy transmitting units is connected to the energy transmitting control unit; The charged device periodically sends a first pilot signal and a second pilot signal to the plurality of energy transmitting units and the energy transmitting control unit, wherein the frequency of the first pilot signal is less than the frequency of the second pilot signal; The energy transmission control unit receives the first pilot signal and sends it to each of the energy transmission units, and each of the energy transmission units calculates a first phase difference based on the first pilot signal received by itself and the first pilot signal sent by the energy transmission control unit; The energy transmission control unit receives the second pilot signal and sends it to each of the energy transmission units, and each of the energy transmission units calculates a second phase difference based on the second pilot signal received by itself and the second pilot signal sent by the energy transmission control unit; The energy transmission control unit sends a local oscillation signal to each of the energy transmission units, the frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal, and a third phase difference corresponding to the local oscillation signal is determined in combination with the first phase difference and the second phase difference; Each of the energy transmitting units performs a phase shift on the received local oscillation signal, delays the calculated third phase difference, and sends the phase-shifted local oscillation signal to the charged device.

2. The device according to claim 1, characterized in that The third phase difference is: in, is the first phase difference, is the second phase difference, f1 is the frequency of the first pilot signal, f2 is the frequency of the second pilot signal, and f0 is the frequency of the local oscillation signal.

3. The device according to claim 1 or 2, characterized in that: The energy transmission control unit controls each of the energy transmission units to calculate the first phase difference and the second phase difference by sending a start phase calculation signal; The energy transmission control unit controls each of the energy transmission units to shift the phase of the local oscillation signal by sending a start transmission signal, and sends the phase-shifted local oscillation signal to the charged device.

4. The device according to claim 3, characterized in that The energy transmission control unit includes: a first microprocessor, a first radio frequency oscillator, a first antenna and a first radio frequency switch; Wherein, the first radio frequency oscillator and the first radio frequency switch are respectively connected to the first microprocessor; The first RF switch selectively connects the first antenna and the first RF oscillator, and when the first microprocessor sends the start phase calculation signal, the first RF switch is connected to the first antenna to send the first pilot signal or the second pilot signal to the energy transmitting unit; When the first microprocessor sends the start transmission signal, the first radio frequency switch is connected to the first radio frequency oscillator to send the local oscillation signal to the energy transmission unit.

5. The device according to claim 4, characterized in that The energy transmitting unit includes: a second microprocessor, a phase detector, a phase shifter, a second antenna, a second radio frequency switch and a third radio frequency switch; Wherein, the phase detector, the phase shifter, the second radio frequency switch and the third radio frequency switch are respectively connected to the second microprocessor; One side of the second RF switch is connected to the second antenna, and the other side is selectively connected to the phase detector and the phase shifter. One side of the third RF switch is connected to the first RF switch, and the other side is selectively connected to the phase detector and the phase shifter. The second microprocessor is connected to the first microprocessor for receiving the start phase calculation signal or the start transmission signal.

6. The device according to claim 1 or 2, characterized in that: The charged device includes: a third microprocessor, a first pilot signal generator, a second pilot signal generator, a fourth radio frequency switch, a microwave energy collection module, a third antenna and a fourth antenna; Wherein, the microwave energy collection module supplies power to the third microprocessor, the first pilot signal generator and the second pilot signal generator; The third antenna is connected to the microwave energy collection module and is used to collect energy for the microwave energy collection module; The fourth radio frequency switch is connected to the third microprocessor, one side of the fourth radio frequency switch is connected to the fourth antenna, and the other side of the fourth radio frequency switch is selectively connected to the first pilot signal generator and the second pilot signal generator.

7. The device according to claim 6, characterized in that The charged device further comprises: a standard energy output interface; The standard energy output interface is connected to the microwave energy collection module.

8. A phase tracking wireless charging method, applied to a phase tracking wireless charging device as described in any one of claims 1 to 7, wherein the phase tracking wireless charging device comprises a wireless charging device and a charged device, wherein the wireless charging device comprises a plurality of energy transmitting units and an energy transmitting control unit, wherein each of the energy transmitting units is connected to the energy transmitting control unit, and wherein: The method comprises: Periodically sending a first pilot signal and a second pilot signal to the plurality of energy transmitting units and the energy transmitting control unit through the charged device, wherein the frequency of the first pilot signal is less than the frequency of the second pilot signal; The energy transmission control unit receives the first pilot signal and sends it to each of the energy transmission units, and each of the energy transmission units calculates a first phase difference based on the first pilot signal received by itself and the first pilot signal sent by the energy transmission control unit; After receiving the second pilot signal through the energy transmission control unit, the second pilot signal is sent to each of the energy transmission units, and each of the energy transmission units calculates a second phase difference according to the second pilot signal received by itself and the second pilot signal sent by the energy transmission control unit; Sending a local oscillation signal to each of the energy transmitting units through the energy transmitting control unit, wherein the frequency of the local oscillation signal is between the frequency of the first pilot signal and the frequency of the second pilot signal, and determining a third phase difference corresponding to the local oscillation signal in combination with the first phase difference and the second phase difference; The received local oscillation signal is phase-shifted by each of the energy transmitting units to delay the calculated third phase difference, and the phase-shifted local oscillation signal is sent to the charged device.

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