A wireless radio frequency charging method and device

Abstract

An embodiment of the present application provides a wireless radio frequency charging method and circuit. The method includes: obtaining target parameters; if the target parameters meet the switching condition, controlling the antenna array to transmit a second radio frequency signal to locate an energy receiving device within a spatial range, and obtaining a feedback signal of the second radio frequency signal; if the energy receiving device is located based on the feedback signal of the second radio frequency signal, controlling the antenna array to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal according to the transmission path determined based on the feedback signal, so as to achieve wireless charging through the air.

Description

Technical Field

[0001] Embodiments of the present application relate to radio frequency charging technology, including but not limited to a wireless radio frequency charging method and device. Background Art

[0002] In related radio frequency charging technologies, in order to improve the charging power, the radio frequency charging frequency can be increased to the millimeter wave band, and beamforming is used to achieve high-power and low-loss energy transmission. However, the radiation angle of the radio frequency antenna array is limited. In the case where the energy receiving device is not within the radiation angle range of the antenna array, it is impossible to transmit radio frequency signals to achieve wireless charging. Summary of the Invention

[0003] Embodiments of the present application are expected to provide a wireless charging control method and circuit for a battery.

[0004] In a first aspect, embodiments of the present application provide a wireless radio frequency charging method, the method including:

[0005] Obtaining target parameters, where the target parameters are related to transmitting a first radio frequency signal through an antenna array;

[0006] If the target parameters meet the switching condition, controlling the antenna array to transmit a second radio frequency signal to locate an energy receiving device within a space range, where the frequency of the second radio frequency signal is lower than the frequency of the first radio frequency signal;

[0007] Obtaining a feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is a reflected signal after the second radio frequency signal is reflected within the space range;

[0008] If the energy receiving device is located based on the feedback signal of the second radio frequency signal, controlling the antenna array to transmit energy to the energy receiving device within the space range with the second radio frequency signal based on the transmission path determined by the feedback signal, so as to achieve wireless charging through the air.

[0009] In a second aspect, embodiments of the present application provide a transmitting device for wireless charging, the transmitting device including:

[0010] An antenna array, configured to transmit a second radio frequency signal with a first radiation angle in response to a first control signal of a control component, and transmit a second radio frequency signal with a second radiation angle in response to a second control signal of the control component; the first radiation angle is greater than the second radiation angle;

[0011] The control component is configured to obtain a target parameter, which is related to transmitting a first radio frequency signal through an antenna array; if the target parameter meets a switching condition, generate a second control signal to control the antenna array to transmit a second radio frequency signal at the first radiation angle to locate an energy receiving device within a space range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal; obtain a feedback signal of the second radio frequency signal, and the feedback signal of the second radio frequency signal is a reflected signal of the second radio frequency signal reflected within the space range; if the energy receiving device is located based on the feedback signal of the second radio frequency signal, generate a third control signal, and control the antenna array based on the transmission path determined by the feedback signal to transmit energy to the energy receiving device within the space range with the second radio frequency signal at the second radiation angle, so as to achieve wireless charging through air.

[0012] In an embodiment of the present application, if a target parameter related to transmitting a first radio frequency signal through an antenna array meets a switching condition, control the antenna array to transmit a second radio frequency signal to locate an energy receiving device within a space range. If the energy receiving device is located based on the obtained feedback signal of the second radio frequency signal, control the antenna array based on the transmission path determined by the feedback signal to transmit energy to the energy receiving device within the space range with the second radio frequency signal, so as to achieve wireless charging through air. In this way, when the first radio frequency signal is in the millimeter wave band and the second radio frequency signal is in the radio frequency band, it is possible to switch to low-frequency positioning, and when the energy receiving device is located, the second radio frequency signal (low-frequency signal) can be used to transmit energy, avoiding the problem that radio frequency signals cannot be transmitted to achieve wireless charging when the energy receiving device is not within the radiation angle range of the antenna array.

[0013] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present application. Description of the Drawings

[0014] The drawings here are incorporated into the specification and constitute a part of this specification. These drawings show embodiments consistent with the present application and are used together with the specification to illustrate the technical solutions of the present application.

[0015] Figure 1 It is a schematic diagram of the implementation process of a wireless radio frequency charging method provided by an embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the implementation process of another wireless radio frequency charging method provided by an embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the implementation process of yet another wireless radio frequency charging method provided by an embodiment of the present application;

[0018] Figure 4 Schematic diagram of the implementation process of yet another wireless radio frequency charging method provided by an embodiment of the present application;

[0019] Figure 5 Schematic diagram of the implementation process of another wireless radio frequency charging method provided by an embodiment of the present application;

[0020] Figure 6 Schematic diagram of the implementation process of yet another wireless radio frequency charging method provided by an embodiment of the present application;

[0021] Figure 7 Schematic diagram of the composition structure of a transmitting device for wireless radio frequency charging provided by an embodiment of the present application;

[0022] Figure 8 Schematic diagram of the composition structure of another transmitting device for wireless radio frequency charging provided by an embodiment of the present application. Detailed implementation manners

[0023] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are only used to explain the present application and are not used to limit the present application. In addition, the embodiments provided below are partial embodiments for implementing the present application, rather than all embodiments for implementing the present application. Without conflict, the technical solutions described in the embodiments of the present application can be implemented in any combined manner.

[0024] It should be noted that in the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a method or device including a series of elements not only includes the clearly recited elements, but also includes other elements not explicitly listed, or further includes elements inherent to the implementation of the method or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of other related elements in the method or device including the element (such as steps in the method or units in the device, for example, the unit can be a partial circuit, a partial processor, a partial program or software, etc.).

[0025] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, U and / or W can represent: U exists alone, U and W exist simultaneously, and W exists alone. In addition, the term "at least one" in this article represents any one of multiple or any combination of at least two of multiple. For example, including at least one of U, W, and V can represent including any one or more elements selected from the set composed of U, W, and V.

[0026] RF charging generates electromagnetic waves through an electromagnetic wave generator, emits the electromagnetic waves through a transmitting antenna, and after the receiving antenna at the other end receives the electromagnetic wave signal, it converts the electromagnetic wave signal into electrical energy to charge the battery.

[0027] The RF charging frequency affects the charging performance, including power, distance, and directivity.

[0028] Low-frequency transmission schemes, such as implementation schemes of 900 MHz (megahertz) / 2.4 GHz (gigahertz) / 5 GHz, etc., can only achieve power less than 1 W (watt), and generally the highest power is only a few tens of milliwatts to a few hundred milliwatts of energy transmission.

[0029] In related technologies, in order to increase the charging power, the RF charging frequency is increased to the millimeter wave band, and beamforming is used to implement an energy transmission scheme with high power and low loss. The power of RF charging after increasing the charging frequency to the millimeter wave band can reach several watts to dozens of watts. However, after the frequency is increased, the energy is concentrated at the working point, but the radiation angle of the RF antenna array is limited. In the case where the energy receiving device is not within the radiation angle range of the antenna array, it is impossible to transmit RF signals to achieve wireless charging.

[0030] Based on the above technical problems, the embodiments of the present application provide a wireless RF charging method, as Figure 1 shown, the method includes:

[0031] Step S101: Obtain target parameters, where the target parameters are related to transmitting a first RF signal through an antenna array;

[0032] It can be understood that the first RF signal can be an RF signal in the millimeter wave band of a wireless RF transmitting device.

[0033] In one implementation, the target parameter can be the feedback signal of the first RF signal when the antenna array transmits the first RF signal for positioning the energy receiving device. Correspondingly, the implementation of obtaining the target parameter can be to obtain and receive the feedback signal of the first RF signal sent by the energy receiving device through a pre-established Bluetooth or wifi channel, and / or directly receive the reflected signal of the energy receiving device, and determine the feedback signal of the first RF signal based on the received reflected signal.

[0034] In another implementation, the target parameter can be the charging power of the energy receiving device when the antenna array transmits energy to the energy receiving device for wireless charging through the air using the first RF signal. Correspondingly, the implementation of obtaining the target parameter can be to obtain and receive the charging power of the energy receiving device through a pre-established Bluetooth or wifi channel.

[0035] Step S102: If the target parameter meets the switching condition, control the antenna array to transmit a second radio frequency signal to locate the energy receiving device within a spatial range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal;

[0036] It can be understood that the second radio frequency signal can be a radio frequency signal of 900 MHz / 2.4 GHz / 5 GHz.

[0037] In one example, the switching condition refers to the condition for switching from the state of transmitting the first radio frequency signal to locate the energy receiving device or transmitting the first radio frequency signal to wirelessly charge the energy receiving device to transmitting the second radio frequency signal to locate the energy receiving device.

[0038] In some embodiments, if the target parameter meets the switching condition, controlling the antenna array to transmit a second radio frequency signal to locate the energy receiving device within a spatial range may be to control the antenna array to transmit the second radio frequency signal (low-frequency signal) when the condition for switching from the state of transmitting the first radio frequency signal to locate the energy receiving device or transmitting the first radio frequency signal to wirelessly charge the energy receiving device to transmitting the second radio frequency signal to locate the energy receiving device is met, so as to locate the energy receiving device within a spatial range. Here, since the second radio frequency signal is implemented without beamforming, similar to an omnidirectional antenna, the energy reception is more similar to harvesting, and the spatial range can also be defined as an indoor environment. Therefore, the energy can be traced through the reflection positioning of the beam.

[0039] Step S103: Obtain the feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is the reflected signal of the second radio frequency signal after reflection within the spatial range;

[0040] Here, the feedback signal of the second radio frequency signal may include the energy feedback signal of the first radio frequency signal and the information feedback signal of the first radio frequency signal. The energy feedback signal of the first radio frequency signal may be the reflected signal of the first radio frequency signal by the energy receiving device; the information feedback signal of the first radio frequency signal may be the power change in some antenna array regions, or may also be current, voltage changes, etc.

[0041] In a possible implementation manner, obtaining the feedback signal of the second radio frequency signal may be to obtain and receive the information feedback signal sent by the energy receiving device through a pre-established Bluetooth or Wi-Fi path and the reflected signal of the first radio frequency signal reflected by the energy receiving device received by the receiving antenna array of the radio frequency signal transmitter.

[0042] Step S104: If the energy receiving device is located based on the feedback signal of the second radio frequency signal, control the antenna array to transmit energy to the energy receiving device within the space range with the second radio frequency signal according to the transmission path determined based on the feedback signal, so as to achieve wireless charging through the air.

[0043] It can be understood that based on the feedback signal of the second radio frequency signal, that is, energy transmission can be achieved by using reflection. After omnidirectional transmission, the energy collection path can be collected, such as reflection and refraction in space, and finally it will reach the energy receiving device. The wireless radio frequency transmitter can calculate the direction of the final beam according to this path, and no energy needs to be transmitted to other non-receiving positions.

[0044] In some possible implementation manners, if the energy receiving device is located based on the feedback signal of the second radio frequency signal, controlling the antenna array to transmit energy to the energy receiving device within the space range with the second radio frequency signal according to the transmission path determined based on the feedback signal to achieve wireless charging through the air may be that when the energy receiving device is located based on the feedback signal of the second radio frequency signal, the first transmission path corresponding to the position where the energy receiving device is located is determined according to the feedback signal of the second radio frequency signal, and the antenna array is controlled to transmit energy to the energy receiving device within the space range based on the first transmission path with the second radio frequency preference, so as to achieve wireless charging through the air.

[0045] In practical applications, steps S101 to S104 can be implemented by using a control component in a wireless radio frequency transmitting device for transmitting radio frequency charging signals in a radio frequency charging system. The above control component can be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor.

[0046] In an embodiment of the present application, if the target parameters related to transmitting the first radio frequency signal through the antenna array meet the switching conditions, the antenna array is controlled to transmit a second radio frequency signal to locate the energy receiving device within the space range. If the energy receiving device is located based on the feedback signal of the obtained second radio frequency signal, the antenna array is controlled to transmit energy to the energy receiving device within the space range with the second radio frequency signal according to the transmission path determined based on the feedback signal, so as to achieve wireless charging through the air. In this way, when the first radio frequency signal is in the millimeter wave band and the second radio frequency signal is in the radio frequency band, it is possible to switch to low-frequency positioning, and when the energy receiving device is located, the second radio frequency signal (low-frequency signal) can be used to transmit energy, avoiding the problem that the radio frequency signal cannot be transmitted to achieve wireless charging when the energy receiving device is not within the radiation angle range of the antenna array.

[0047] Figure 2 FIG. is a schematic implementation flowchart of another wireless radio frequency charging method provided by an embodiment of the present application. As Figure 2 shown, the method includes:

[0048] Step S201: Transmit a beam including a plurality of the first radio frequency signals through the antenna array to locate the energy receiving device within the space range, and the beam including a plurality of the first radio frequency signals corresponds to different directions within the space range;

[0049] It can be understood that when the physical characteristics of the antenna array such as shape and position are fixed, the radiation angle (coverage angle) of the antenna array is fixed. Moreover, the beam including a plurality of the first radio frequency signals can be the first radio frequency signal beams in different directions within the radiation angle range.

[0050] In one example, the beam including a plurality of the first radio frequency signals can be a high-frequency radio frequency beam in the form of a first pulse. For example, it can be a high-frequency radio frequency beam with a frequency of 100 ms (milliseconds).

[0051] Step S202: Obtain the feedback signal of each of the first radio frequency signals, and the target parameters are related to transmitting the first radio frequency signal through the antenna array;

[0052] It can be understood that the feedback signal of the first radio frequency signal can be an energy feedback signal or an information feedback signal. Among them, the energy feedback signal can be the reflected signal of the energy receiving device, and the transmission speed is relatively fast, but it is easily interfered. The information feedback signal can be the information reflecting the power change received by the energy receiving device obtained through pre-established out-of-band communication (such as wireless transmission methods such as Bluetooth and Wi-Fi). The information form can be relatively diverse. For example, it can be the power change in some antenna areas, or the current or voltage change, etc.

[0053] Step S203: If the feedback signal of each of the first radio frequency signals does not meet the transmission condition, control the antenna array to transmit a second radio frequency signal to locate the energy receiving device within the spatial range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal;

[0054] In a possible implementation, the transmission condition can be understood as the condition for enabling energy transmission through the first radio frequency signal.

[0055] In an example, that the feedback signal of each of the first radio frequency signals does not meet the transmission condition may be that the energy feedback signal of each received first radio frequency signal indicates that the signal strength is not strong enough, or the information feedback signal of each first radio frequency signal indicates that the reflected energy is not enough for the transmitted energy.

[0056] Step S204: Obtain the feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is the reflected signal after the second radio frequency signal is reflected within the spatial range;

[0057] Step S205: If the energy receiving device is located based on the feedback signal of the second radio frequency signal, control the antenna array to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal according to the transmission path determined based on the feedback signal, so as to achieve wireless charging through the air.

[0058] In the embodiment of the present application, first, the energy receiving device is located through the first radio frequency signal. When the feedback signal of each first radio frequency signal does not meet the transmission condition, the energy receiving device is located through the second radio frequency signal with a frequency lower than that of the first radio frequency signal. When the energy receiving device is located, energy is transmitted to the energy receiving device within the spatial range through the second radio frequency signal, so as to achieve wireless charging through the air. In this way, the problem that wireless charging cannot be achieved by transmitting radio frequency signals when the energy receiving device is not within the high-frequency radiation angle range of the antenna array is avoided.

[0059] Figure 3 It is a schematic flowchart of the implementation process of another wireless radio frequency charging method provided by the embodiment of the present application. As Figure 3 shown, the method includes:

[0060] Step S301: Transmit a beam including a plurality of the first radio frequency signals through the antenna array to locate the energy receiving device within the spatial range, where the beam including a plurality of the first radio frequency signals corresponds to different directions within the spatial range;

[0061] Step S302: Establish a communication channel for out-of-band communication of the energy receiving device;

[0062] It can be understood that the communication channels for out-of-band communication may include a Wi-Fi connection channel, a Bluetooth connection channel, etc.

[0063] In a possible implementation manner, the communication channel for out-of-band communication of the energy receiving device may be established before the energy receiving device is located, or may be established after the energy receiving device is located.

[0064] Step S303: Obtain an information feedback signal of each of the first radio frequency signals through the communication channel;

[0065] In one implementation manner, obtaining an information feedback signal of each of the first radio frequency signals through the communication channel may be that the energy receiving device transmits the information feedback signal through the communication channel, and the wireless radio frequency transmitter receives the information feedback signal based on the communication channel.

[0066] Step S304: Obtain an energy feedback signal of each of the first radio frequency signals;

[0067] Step S305: If the energy feedback signal of each of the first radio frequency signals does not meet the first sub-transmission condition related to the reflected signal of the first radio frequency signal, and the information feedback signal of each of the first radio frequency signals does not meet the second sub-transmission condition related to the received power of the energy receiving device, control the antenna array to transmit a second radio frequency signal to locate the energy receiving device within the spatial range, where the frequency of the second radio frequency signal is lower than the frequency of the first radio frequency signal;

[0068] It can be understood that in the case where the energy reflection signal of the first radio frequency signal does not meet the first sub-transmission condition and the information feedback signal does not meet the second sub-transmission condition, control the antenna array to transmit a second radio frequency signal to locate the energy receiving device within the spatial range.

[0069] In a possible implementation manner, determining whether the second sub-transmission condition is met based on the information feedback signal is the main determination means for whether to switch to the second radio frequency signal charging mode; determining whether the first sub-transmission condition is met based on the energy feedback signal is the auxiliary determination means for whether to switch to the second radio frequency signal charging mode.

[0070] Step S306: Obtain the feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is the reflected signal of the second radio frequency signal reflected within the spatial range;

[0071] Step S307: If the energy receiving device is located based on the feedback signal of the second radio frequency signal, control the antenna array based on the transmission path determined by the feedback signal to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal, so as to achieve wireless charging through the air.

[0072] In the embodiment of the present application, the feedback signal includes an energy feedback signal and an information feedback signal. When the energy feedback signal of the first radio frequency signal does not meet the first sub-transmission condition and the information feedback signal of the first radio frequency signal also does not meet the second sub-transmission condition, the energy receiving device is located by a second radio frequency signal with a frequency lower than that of the first radio frequency signal. When the energy receiving device is located, energy is transmitted to the energy receiving device within the spatial range with the second radio frequency signal, so as to achieve wireless charging through the air. Since the dual condition judgments of the energy feedback signal and the information feedback signal are carried out simultaneously, the reliability of the switching condition from the first radio frequency signal to the second radio frequency signal is higher.

[0073] Figure 4 It is a schematic implementation flow diagram of another wireless radio frequency charging method provided by the embodiment of the present application. As Figure 4 shown, the method includes:

[0074] Step S401: Transmit energy to the energy receiving device within the spatial range through the antenna array with the first beam of the first radio frequency signal for wireless charging through the air; the energy receiving device is located in the transmission direction of the first beam;

[0075] It can be understood that the transmission direction of the first beam is the direction determined during the positioning process of the energy receiving device before the antenna array transmits energy to the energy receiving device through the first beam of the first radio frequency signal for wireless charging through the air.

[0076] Here, during the process of energy transmission of the second radio frequency signal through beamforming technology, the working point of beamforming is related to the position of the energy receiving device. For energy receiving devices at different positions, beamforming corresponds to different working angles.

[0077] It should be noted that when the energy receiving device can be located through the second radio frequency signal, the energy receiving device can definitely be located through the first radio frequency signal.

[0078] Step S402: Monitor the charging power of the energy receiving device;

[0079] It can be understood that the energy receiving device can obtain its own charging power in real time, and then transmit the charging power value to the wireless radio frequency transmitting end through an out-of-band communication channel. The wireless radio frequency transmitting end receives the charging power value in real time to monitor the charging power of the energy receiving device.

[0080] Step S403: If the charging power is lower than the power threshold, control the antenna array to transmit a second radio frequency signal to locate the energy receiving device within the spatial range, where the frequency of the second radio frequency signal is lower than the frequency of the first radio frequency signal;

[0081] It can be understood that the power threshold can be the lowest power value of the energy receiving device during the process of charging with the energy of the second radio frequency signal.

[0082] In one implementation, if the charging power being lower than the power threshold indicates that the energy receiving device deviates from the emission direction of the first beam. At this time, the energy receiving device may have undergone a position transformation or left the spatial range.

[0083] In an example, the emission direction of the first beam is the direction determined based on the position of the energy receiving device.

[0084] It can be understood that the energy transmission through the second radio frequency signal starts the millimeter-wave band energy transmission at the detected position of the energy receiving device. When the position of the energy receiving device changes, there is no energy receiving device at the original position, while the wireless radio frequency transmitter emits the second radio frequency signal towards the angle corresponding to the original position. Therefore, the energy receiving device cannot receive energy or receives very little energy, and thus the charging power of the energy receiving device will decrease significantly.

[0085] Step S404: Obtain the feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is the reflected signal after the second radio frequency signal is reflected within the spatial range;

[0086] Step S405: If the energy receiving device is located based on the feedback signal of the second radio frequency signal, control the antenna array to emit energy to the energy receiving device within the spatial range with the second radio frequency signal based on the emission path determined by the feedback signal to achieve wireless charging through the air.

[0087] In the embodiment of the present application, when the antenna array emits energy to the energy receiving device within the spatial range with the first beam of the first radio frequency signal for wireless charging through the air, if it is detected that the charging power of the energy receiving device is lower than the power threshold, then control the antenna array to switch from emitting the first radio frequency signal to emitting a second radio frequency signal with a frequency lower than the first radio frequency signal. In this way, it can be ensured that the energy receiving device is always in a charging state.

[0088] Figure 5 This is a schematic diagram of the implementation process of another wireless radio frequency charging method provided by an embodiment of the present application. As Figure 5 shown, the method includes:

[0089] Step S501: Transmit energy to the energy receiving device within the space range by the antenna array in the first beam of the first radio frequency signal for wireless charging through the air; the energy receiving device is located in the emission direction of the first beam;

[0090] Step S502: Monitor the charging power of the energy receiving device;

[0091] Step S503: If the charging power is lower than the power threshold, re - emit a beam including a plurality of the first radio frequency signals through the antenna array to re - position the energy receiving device within the space range, and the plurality of the first radio frequency signals correspond to different directions within the space range;

[0092] In an implementation manner, since the charging power of the energy receiving device is lower than the power threshold, it indicates that the position of the energy receiving device has changed. In order to continue charging the energy receiving device with the second radio frequency signal, therefore, it is necessary to re - position the energy receiving device to determine whether the energy receiving device is within the radiation angle range of the antenna array. At this time, the position of the energy receiving device can be scanned at a lower scanning frequency to achieve re - positioning of the energy receiving device.

[0093] Step S504: Re - obtain the feedback signal of each of the first radio frequency signals;

[0094] Step S505: If the energy receiving device is re - positioned based on the feedback signal of the first radio frequency signal, control the antenna array to transmit energy to the energy receiving device within the space range in the second beam of the first radio frequency signal based on the position of the re - positioned energy receiving device to achieve wireless charging through the air; the energy receiving device is located in the emission direction of the second beam;

[0095] It can be understood that since the emission direction of the second beam is determined based on the position of the energy receiving device after the position change, the emission direction of the second beam is different from that of the first beam.

[0096] Step S506: If the energy receiving device is not re - positioned based on the feedback signal of the first radio frequency signal, control the antenna array to transmit a second radio frequency signal to position the energy receiving device within the space range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal;

[0097] Step S507: Obtain the feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is the reflected signal of the second radio frequency signal reflected within the spatial range.

[0098] Step S508: If the energy receiving device is located based on the feedback signal of the second radio frequency signal, control the antenna array to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal according to the transmission path determined based on the feedback signal, so as to achieve wireless charging through the air.

[0099] In the embodiment of the present application, when the charging power of the energy receiving device is lower than the power threshold, that is, when the energy receiving device deviates from the original position, the antenna array can be controlled to re-transmit the second radio frequency signal to determine whether the energy receiving device after the position movement is still within the radiation angle range of the antenna array. If so, beamforming can be re-performed based on the position of the re-located energy receiving device, and then continue to transmit energy to the energy receiving device with the second radio frequency signal to achieve charging of the energy receiving device, with a greater charging power and higher efficiency.

[0100] In one implementation manner, when transmitting energy to the energy receiving device within the spatial range with the second radio frequency signal for wireless charging through the air, the transmission path is changed as the energy receiving device moves within the spatial range.

[0101] It can be understood that since the second radio frequency signal is a radio frequency signal in a non-millimeter wave band, the radiation angle of the antenna array in the frequency band of the second radio frequency signal can cover the entire above-mentioned spatial range. Therefore, no matter how the energy receiving device moves within the spatial range, the energy receiving device can be located through the second radio frequency signal.

[0102] Meanwhile, in the non-millimeter wave band, energy can be tracked through beam reflection positioning, that is, the wireless radio frequency transmitter can utilize reflection to achieve energy transmission. After omnidirectional transmission, the energy path can be collected, such as reflection and refraction in space, and finally reach the energy receiving device. The wireless radio frequency transmitter can calculate the transmission path (direction) of the beam according to this path. For example, for the omnidirectional second radio frequency signal transmitted by the wireless radio frequency transmitter, where the energies of the second radio frequency signals a, b, c, and d reaching the energy receiving device are P1, P2, P3, and P4 respectively, and only the energy of P1 meets the preset energy requirement, that is, it can be determined that the second radio frequency signal a corresponding to P1 is the effective second radio frequency signal. Therefore, the transmission path of the beam can be determined as the direction of the second radio frequency signal a.

[0103] It can be understood that when the position of the energy receiving device moves or changes, the determined transmission path of the second radio frequency signal also changes, enabling wireless charging of the energy receiving device within the space by transmitting energy with the second radio frequency signal, and the transmission path changes as the energy receiving device moves within the space.

[0104] Figure 6 Schematic diagram of the implementation process of another wireless radio frequency charging method provided by the embodiments of the present application, as Figure 6 shown, the method includes:

[0105] Step S601: Transmit energy to the energy receiving device within the space for wireless charging through the antenna array with the first beam of the first radio frequency signal; the energy receiving device is located in the transmission direction of the first beam;

[0106] Step S602: Obtain a shielding parameter;

[0107] In a possible implementation manner, the shielding parameter may be a feedback signal received by the radio frequency transmitter.

[0108] It can be understood that when a user or the user's body is located between the beam transmitting end of the first radio frequency signal and the energy receiving device, part of the energy of the transmitted first radio frequency signal will be absorbed; when there is a metal obstacle between the beam transmitting end of the first radio frequency signal and the energy receiving device, the energy of the transmitted first radio frequency signal will be strongly reflected; when there are obstacles such as wood or glass between the beam transmitting end of the first radio frequency signal and the energy receiving device, the influence on the energy of the transmitted first radio frequency signal is relatively small.

[0109] Step S603: Based on the shielding parameter, reduce or turn off wireless charging of the energy receiving device within the space by transmitting energy with the first beam including the first radio frequency signal.

[0110] In a possible implementation manner, reducing or turning off wireless charging of the energy receiving device within the space by transmitting energy with the first beam including the first radio frequency signal based on the shielding parameter may be to reduce or turn off wireless charging of the energy receiving device within the space by transmitting energy with the first beam including the first radio frequency signal when the energy of the received feedback signal is between the first energy and the second energy. Here, the first energy may be the feedback energy obtained when the antenna array transmits the second radio frequency signal to locate the energy receiving device; the second energy may be the feedback energy obtained when the antenna array transmits the first radio frequency signal to locate the energy receiving device.

[0111] It can be understood that the energy in the embodiments of the present application can be reflected by the detected voltage value.

[0112] In an embodiment of the present application, the energy transmitted by the first beam including the first radio frequency signal can be reduced or turned off based on the obtained shielding parameters to wirelessly charge the energy receiving device within the spatial range. In this way, people or animals within the spatial range can be protected. At the same time, when the existing obstacle is metal, the wireless radio frequency energy transmitter can also be protected.

[0113] Figure 7 A schematic diagram of the structure of a wireless radio frequency charging transmitter provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the wireless radio frequency charging transmitting device 700 includes:

[0114] The antenna array 701 is configured to transmit a second radio frequency signal at a first radiation angle in response to a first control signal of a control component, and transmit a second radio frequency signal at a second radiation angle in response to a second control signal of the control component; the first radiation angle is greater than the second radiation angle;

[0115] Here, the first radiation angle may be an omnidirectional radiation angle, that is, the first radiation angle may be 360° (degrees) in space; the second radiation angle may be an angle whose angle range is less than the first radiation angle determined according to the position of the energy receiving device. For example, when the angle of transmitting the second radio frequency signal corresponding to the position of the energy receiving device is 20°, the range of the second radiation angle is determined to be 18° to 25°.

[0116] In one example, the second radiation angle is the angle at which the second radio frequency signal is transmitted corresponding to the location of the energy receiving device. For example, when the angle at which the second radio frequency signal is transmitted corresponding to the location of the energy receiving device is 20°, the second radiation angle is determined to be 20°.

[0117] The control component 702 is configured to obtain a target parameter, where the target parameter is related to transmitting a first radio frequency signal through an antenna array; if the target parameter meets a switching condition, generate a second control signal to control the antenna array to transmit the second radio frequency signal at the first radiation angle to locate an energy receiving device within a spatial range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal; obtain a feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is a reflected signal of the second radio frequency signal reflected within the spatial range; if the energy receiving device is located based on the feedback signal of the second radio frequency signal, generate a third control signal, and control the antenna array based on the transmission path determined by the feedback signal to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal at the second radiation angle, so as to achieve wireless charging through air.

[0118] It can be understood that the antenna array 701 can be implemented by different antenna element sets respectively, or in a multiplexing form. For example, for 100 antenna elements, radio frequency electromagnetic beams can be transmitted through all the antenna elements in the high frequency band, and 70 of them can be selected for radio frequency electromagnetic beam transmission in the low frequency band.

[0119] Figure 8 This is a schematic structural diagram of another transmitting device for wireless radio frequency charging provided by an embodiment of the present application. As Figure 8 shown, the transmitting device 800 for wireless radio frequency charging includes:

[0120] The first sub-antenna array 801 is configured to transmit the second radio frequency signal at a third radiation angle in response to the first control signal;

[0121] Here, the third radiation angle can be from 0° to 180° in space.

[0122] It can be understood that in order to enable the antenna array to achieve an omnidirectional radiation angle, it can be implemented by two different antenna arrays, the first sub-antenna array 801 and the second sub-antenna array 802.

[0123] The second sub-antenna array 802 is configured to transmit the second radio frequency signal at a fourth radiation angle in response to the first control signal; where the sum of the third radiation angle and the fourth radiation angle is equal to the first radiation angle;

[0124] Here, the fourth radiation angle can be from 180° to 0°.

[0125] The control component 803 is configured to obtain a target parameter, where the target parameter is related to transmitting a first radio frequency signal through an antenna array; if the target parameter meets a switching condition, generate a second control signal to control the antenna array to transmit a second radio frequency signal at the first radiation angle to locate an energy receiving device within a spatial range, where the frequency of the second radio frequency signal is lower than that of the first radio frequency signal; obtain a feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is a reflected signal of the second radio frequency signal reflected within the spatial range; if the energy receiving device is located based on the feedback signal of the second radio frequency signal, generate a third control signal, and control the antenna array based on the transmission path determined by the feedback signal to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal at the second radiation angle, so as to achieve wireless charging through air.

[0126] In a possible implementation manner, the first sub-antenna array 801 and the second sub-antenna array 802 may be located on different surfaces of a mounting plate for mounting the antenna array. For example, the first sub-antenna array 801 may be located on the upper surface of the mounting plate and the second sub-antenna array 802 may be located on the lower surface of the mounting plate.

[0127] In some implementation manners, when wireless charging through air is achieved by transmitting energy to an energy receiving device within a spatial range with a first radio frequency signal, stop transmitting energy to the energy receiving device within the spatial range to achieve wireless charging through air.

[0128] In the embodiments of the present application, the first radio frequency signal may be determined as a high-frequency signal, and the second radio frequency signal may be determined as a low-frequency signal.

[0129] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. The same or similar parts can be referred to each other. For the sake of brevity, they will not be repeated herein.

[0130] In the method embodiments disclosed in the present application, the disclosed methods can be arbitrarily combined without conflict to obtain new method embodiments.

[0131] In the product embodiments disclosed in the present application, the disclosed features can be arbitrarily combined without conflict to obtain new product embodiments.

[0132] In the method or device embodiments disclosed in the present application, the disclosed features can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0133] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-described embodiments. The above-described embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims. All of these fall within the protection scope of the present application.

Claims

1. A wireless radio frequency charging method, characterized in that, The method includes: Obtaining a target parameter, where the target parameter is related to transmitting a first radio frequency signal through an antenna array; the first radio frequency signal belongs to the millimeter wave band; If the target parameter meets a switching condition, controlling the antenna array to transmit a second radio frequency signal to locate an energy receiving device within a spatial range, where the frequency of the second radio frequency signal is a non-millimeter wave band, and the fact that the target parameter meets the switching condition indicates that wireless charging through the first radio frequency signal is not satisfied; Obtaining a feedback signal of the second radio frequency signal, where the feedback signal of the second radio frequency signal is a reflected signal of the second radio frequency signal reflected within the spatial range; If the energy receiving device is located based on the feedback signal of the second radio frequency signal, controlling the antenna array to transmit energy to the energy receiving device within the spatial range with the second radio frequency signal based on the transmission path determined by the feedback signal, to achieve wireless charging through the air.

2. The method according to claim 1, wherein The method further includes: Transmitting a beam including a plurality of the first radio frequency signals through the antenna array to locate the energy receiving device within the spatial range, where the beam including a plurality of the first radio frequency signals corresponds to different directions within the spatial range; The obtaining of the target parameter includes: Obtaining a feedback signal of each of the first radio frequency signals; Wherein, the switching condition is that the feedback signal of each of the first radio frequency signals does not meet the transmission condition.

3. The method according to claim 2, characterized in that, The feedback signal includes an energy feedback signal, and the obtaining of the feedback signal of each of the first radio frequency signals includes: Obtaining the energy feedback signal of each of the first radio frequency signals; Wherein, the transmission condition includes a first sub-transmission condition related to the reflected signal of the first radio frequency signal; the switching condition includes that the energy feedback signal of each of the first radio frequency signals does not meet the first sub-transmission condition.

4. The method according to claim 2, characterized in that, The method further includes: Establishing a communication channel for out-of-band communication of the energy receiving device; The feedback signal includes an information feedback signal, and the obtaining of the feedback signal of each of the first radio frequency signals further includes: Obtaining the information feedback signal of each of the first radio frequency signals through the communication channel; Wherein, the transmission condition includes a second sub-transmission condition related to the received power of the energy receiving device; the switching condition includes that the information feedback signal of each of the first radio frequency signals does not meet the second sub-transmission condition.

5. The method according to claim 1, characterized in that The method further includes: Transmitting energy to the energy receiving device within the spatial range through the antenna array with a first beam of the first radio frequency signal to achieve wireless charging through the air; the energy receiving device is located in the emission direction of the first beam; The obtaining of the target parameter includes: Monitoring the charging power of the energy receiving device; Wherein, the switching condition includes that the charging power is lower than a power threshold, and if the charging power is lower than the power threshold, it indicates that the energy receiving device deviates from the emission direction of the first beam.

6. The method according to claim 5, characterized in that, The method further includes: When the charging power is lower than the power threshold, the antenna array re - emits a beam including a plurality of the first radio frequency signals to re - position the energy receiving device within the spatial range, and the plurality of the first radio frequency signals correspond to different directions within the spatial range; Re - obtain the feedback signal of each of the first radio frequency signals; If the energy receiving device is re - positioned based on the feedback signal of the first radio frequency signal, control the antenna array to emit energy to the energy receiving device within the spatial range with a second beam of the first radio frequency signal to achieve wireless charging through the air; the energy receiving device is located in the emission direction of the second beam.

7. The method according to any one of claims 1 to 6, characterized in that, Emitting energy to the energy receiving device within the spatial range for wireless charging through the air with the second radio frequency signal changes the emission path as the energy receiving device moves within the spatial range.

8. The method according to claim 5, wherein The method further includes: Obtain a shielding parameter; Based on the shielding parameter, reduce or turn off wireless charging through the air by emitting energy to the energy receiving device within the spatial range with a first beam including a first radio frequency signal.

9. A transmitting device for wireless radio frequency charging, characterized in that, The transmitting device includes: An antenna array for emitting a second radio frequency signal with a first radiation angle in response to a first control signal of a control component, and emitting a second radio frequency signal with a second radiation angle in response to a second control signal of the control component; the first radiation angle is greater than the second radiation angle; The control component for obtaining a target parameter related to emitting a first radio frequency signal through the antenna array, and the first radio frequency signal belongs to the millimeter - wave band; If the target parameter meets a switching condition, generate a second control signal; wherein, the target parameter meeting the switching condition indicates that wireless charging through the air with the first radio frequency signal is not satisfied; Control the antenna array to emit a second radio frequency signal with the first radiation angle to position an energy receiving device within the spatial range, wherein the frequency of the second radio frequency signal is a non - millimeter - wave band; obtain the feedback signal of the second radio frequency signal, and the feedback signal of the second radio frequency signal is a reflected signal of the second radio frequency signal reflected within the spatial range; If the energy receiving device is positioned based on the feedback signal of the second radio frequency signal, generate a third control signal, and control the antenna array based on the emission path determined by the feedback signal to emit energy to the energy receiving device within the spatial range with a second radio frequency signal with the second radiation angle to achieve wireless charging through the air.

10. The transmitting device according to claim 9, characterized in that, The antenna array includes: a first sub - antenna array and a second sub - antenna array located at different positions; The first sub - antenna array for emitting the second radio frequency signal with a third radiation angle in response to the first control signal; The second sub - antenna array for emitting the second radio frequency signal with a fourth radiation angle in response to the first control signal; wherein the sum of the third radiation angle and the fourth radiation angle is equal to the first radiation angle.

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