Wireless earphone capable of being charged across air and wireless earphone control method

Abstract

The invention relates to the technical field of earphones, and provides a wireless earphone capable of being charged across the air and a wireless earphone control method.The wireless earphone comprises an earphone body and a Tesla coil device, the earphone body comprises a receiving coil, a receiving energy conversion module and a rectification module, and the Tesla coil device is used for transmitting induced voltage to the receiving coil; the receiving coil is used for transmitting electric energy to the receiving energy conversion module, the receiving energy conversion module is used for transmitting the alternating current after frequency reduction and voltage stabilization to the rectification module, and the rectification module is used for rectifying the alternating current. The high-frequency electromagnetic field is excited through the Tesla coil device, the electric energy is transmitted to the receiving coil in the earphone body in an electromagnetic resonance coupling mode, the electric energy is stored in the energy storage battery after underclocking, voltage stabilization and rectification processing, a magnetic charging contact is not needed, the earphone does not need to be placed in a specific area of an earphone bin, and the cost is reduced. The problems existing in a magnetic charging contact adopted for charging of an existing wireless earphone are solved.

Description

Technical Field

[0001] The present invention relates to the field of earphone technology, and in particular to a wireless earphone capable of being charged over the air and a wireless earphone control method. Background Art

[0002] Currently, most of the devices on the market that solve the problem of wireless headset charging use magnetic charging contacts or contact wireless charging (Qi standard) to achieve this. Magnetic wireless charging contacts achieve wireless charging through magnetic alignment + physical contact conductive technology. Specifically, it uses magnetic adsorption to achieve a physical connection method of aligning the charging interface, and combines metal contacts for wireless power transmission. The wireless charging Qi standard uses electromagnetic induction technology to achieve wireless charging. The core lies in the design of the receiving coil of the charging compartment. It is based on the principle of electromagnetic induction and realizes wireless power transmission through the charging plate coil in the transmitting end and the coil of the headset charging compartment in the receiving end.

[0003] The magnetic charging contacts require the charging port to be strictly aligned, and the earphones must be placed precisely in a specific area of ​​the charging case, otherwise they will not be able to charge or the efficiency will drop sharply, which poses a position-sensitive problem. Summary of the Invention

[0004] Based on this, in order to solve the problems existing in the magnetic charging contacts used in existing wireless headset charging, the present invention provides a wireless headset with air charging and a wireless headset control method, the specific technical solutions of which are as follows:

[0005] A wireless headset capable of wireless charging includes a headset body, wherein the headset body includes a receiving coil, a receiving energy conversion module, a rectifier module, and an energy storage battery. The wireless headset also includes:

[0006] A Tesla coil device, configured to output an induced voltage and transmit the induced voltage to a receiving coil via resonant coupling;

[0007] Wherein, the receiving coil is used to receive electrical energy and transmit the electrical energy to the receiving and energy conversion module;

[0008] The receiving and converting module is used to reduce the frequency and stabilize the voltage of the induced AC power, and transmit the AC power after the frequency reduction and voltage stabilization to the rectifier module;

[0009] The rectifier module is used to rectify the received alternating current and send it to the energy storage battery for energy storage.

[0010] The wireless earphones that are charged over the air excite a high-frequency electromagnetic field through a Tesla coil device, and use electromagnetic resonance coupling to transmit electrical energy to a receiving coil in the earphone body. After frequency reduction, voltage stabilization and rectification, the electrical energy is stored in an energy storage battery. This enables the earphones to be wirelessly charged and achieve long-term battery life. It does not require magnetic charging contacts and does not require the earphones to be placed in a specific area of ​​the earphone compartment, solving the problems existing in the magnetic charging contacts used in existing wireless earphone charging.

[0011] Preferably, the wireless headset further includes:

[0012] The earphone compartment has a main circuit board at the bottom for providing power to the Tesla coil device;

[0013] Wherein, the Tesla coil device is installed in the earphone compartment.

[0014] Preferably, the earphone compartment is provided with an earphone slot for storing the earphone body, and the side wall of the earphone slot is provided with a coil slot, and the Tesla coil device includes:

[0015] a transmitting coil, disposed in the coil slot;

[0016] A metal channel connects the coil slot and the earphone slot and is used to transmit the high-frequency alternating current induced by the secondary coil to the receiving coil.

[0017] Preferably, the wireless headset further includes a controller, which is used to obtain a real-time distance between the headset body and the Tesla coil device, and adjust the output power of the Tesla coil device according to the real-time distance.

[0018] Preferably, the output power P out =P max ·(1-e - α·d)·η(f);

[0019] Among them, P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

[0020] A method for controlling a wireless headset with air charging is applied to the wireless headset with air charging, and comprises:

[0021] Outputting an induced voltage through a Tesla coil device and transmitting the induced voltage to a receiving coil through a resonant coupling method;

[0022] Receive electrical energy through a receiving coil and transmit the electrical energy to a receiving and energy conversion module;

[0023] The AC power generated by the AC is reduced in frequency and stabilized by the receiving and converting module, and then the reduced in frequency and stabilized AC power is transmitted to the rectifier module.

[0024] The received AC power is rectified by the rectifier module and sent to the energy storage battery for energy storage.

[0025] Preferably, the wireless headset control method further includes:

[0026] Get the real-time distance between the headset and the Tesla coil device;

[0027] The output power of the Tesla coil device is adjusted according to the real-time distance.

[0028] Preferably, the output power P out =P max ·(1-e - α·d)·η(f);

[0029] Among them, P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

[0030] Preferably, the frequency matching efficiency function

[0031] Where f represents the current operating frequency and f0 represents the initial resonant frequency.

[0032] Preferably, the current operating frequency

[0033] Where, e(t) represents the frequency error, K p , K i , K d They represent proportional gain, integral gain, and differential gain respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0035] Figure 1 This is a schematic diagram of the overall structure of a wireless headset with air charging according to one embodiment of the present invention;

[0036] Figure 2Schematic diagram of the structural relationship between the core components, functional modules and earphone compartment cover in one embodiment of the present invention;

[0037] Figure 3 is a schematic structural diagram of an earphone body according to an embodiment of the present invention;

[0038] Figure 4 1 is a schematic structural diagram of a Tesla coil device according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the overall process of a method for controlling a wireless headset with air charging according to an embodiment of the present invention;

[0040] Figure 6 It is a schematic diagram of the overall flow of a method for controlling a wireless headset with air charging in another embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 1. Core components; 2. Energy supply module; 3. Headphone compartment cover; 4. Main circuit board; 5. Tesla coil device; 6. Headphone compartment; 7. Transmitting coil; 8. Headphone slot; 9. Headphone body; 101. Receiving coil; 102. Receiving energy conversion module; 103. Headphone circuit board; 104. Coil slot; 201. Field effect transistor; 202. Heat sink; 204. Metal channel. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0047] Before describing the embodiments of the present invention, a brief introduction to the prior art is given first.

[0048] Wireless charging earbuds are those that can be charged via wireless charging technology. These earbuds typically come with a wireless charging case. Simply place the case on a Qi-enabled wireless charging pad or place the earbuds into a dedicated area of ​​the case, aligning the magnetic charging contacts with the charging port. This allows for charging without the need for a wired connection.

[0049] During use, the magnetic charging contacts are easily corroded by liquids such as sweat, leading to oxidation and unstable charging after long-term use. If the magnetic charging contacts lack sufficient magnetic attraction, even a slight collision can interrupt charging. Furthermore, the magnetic charging contacts require strict alignment of the charging port. The earphones must be precisely placed in a specific area of ​​the charging compartment. Otherwise, charging will not occur or efficiency will plummet, creating a position-sensitive issue.

[0050] Contact wireless charging uses electromagnetic induction as the power source, resulting in significant losses when misaligned. This is also limited by the design of the charging pod, where the coil area is small and the alignment tolerance is even lower. Due to the limited capacity of the charging pod, frequent placement of the earphones in the pod for recharging is necessary during long trips, making contact wireless charging a significant inconvenience for users who urgently need their earphones to function.

[0051] Tesla's wireless charging technology is a form of wireless power transfer based on magnetic induction. It uses magnetic fields to transfer energy between a transmitter and receiver without the need for a physical connection, such as a wire or plug. This technology enables convenient and flexible power transmission, making it particularly suitable for devices that require frequent charging.

[0052] The Tesla coil wireless charging structure mainly consists of the following parts:

[0053] 1. Transmitter Coil: This is one of the key components of the Tesla coil wireless charging system, responsible for generating the magnetic field. The transmitter coil uses the principle of electromagnetic induction to convert electrical energy into magnetic field energy, which is then transmitted to the receiver coil.

[0054] 2. Receiver Coil: Located inside the device being charged, the receiver coil receives the magnetic field energy transmitted by the transmitter coil and converts it into electrical energy to charge the device. The receiver coil is typically integrated with the device's battery management system to ensure a stable and safe charging process.

[0055] 3. Energy Transfer Mechanism: Tesla coil wireless charging achieves wireless energy transfer through the principle of electromagnetic induction. The magnetic field generated by the transmitter coil induces a current in the receiver coil, thereby charging the device. This mechanism is similar to the working principle of a transformer, but without the need for a physical connection.

[0056] 4. Control circuit: To ensure the stability and safety of the charging process, Tesla coil wireless charging systems are usually equipped with control circuits. These circuits are responsible for monitoring the charging process, adjusting the transmission power, and preventing safety issues such as overcharging and over-discharging.

[0057] 5. Housing and Fixtures: Tesla coil wireless charging devices usually have a housing to protect the internal electronic components. The housing design usually takes into account the needs of heat dissipation and electromagnetic shielding to ensure stable operation of the device.

[0058] like Figure 1-Figure 4 As shown, in one embodiment of the present invention, a wireless headset with air charging includes an earphone body, which includes a receiving coil, a receiving energy conversion module, a rectifier module and an energy storage battery. The wireless headset also includes a Tesla coil device, which is used to output an induced voltage and transmit the induced voltage to the receiving coil through resonant coupling.

[0059] Among them, the receiving coil is used to receive electrical energy and transmit the electrical energy to the receiving energy conversion module, the receiving energy conversion module is used to reduce the frequency and stabilize the voltage of the induced alternating current, and transmit the alternating current after frequency reduction and voltage stabilization to the rectifier module, and the rectifier module is used to rectify the received alternating current and send it to the energy storage battery for energy storage processing.

[0060] The wireless earphones that are charged over the air excite a high-frequency electromagnetic field through a Tesla coil device, and use electromagnetic resonance coupling to transmit electrical energy to a receiving coil in the earphone body. After frequency reduction, voltage stabilization and rectification, the electrical energy is stored in an energy storage battery. This enables the earphones to be wirelessly charged and achieve long-term battery life. It does not require magnetic charging contacts and does not require the earphones to be placed in a specific area of ​​the earphone compartment, solving the problems existing in the magnetic charging contacts used in existing wireless earphone charging.

[0061] The wireless headset also includes an earphone compartment. A main circuit board for providing power to the Tesla coil device is located at the bottom of the compartment. The Tesla coil device is mounted within the compartment, which includes an earphone slot for storing the earphone body. The sidewalls of the slot are provided with a coil slot. Specifically, the slot matches the earphone body, with the coil slot located between the two slots.

[0062] Preferably, the Tesla coil device includes a secondary coil and a metal channel. The transmitting coil is disposed in the coil slot; the metal channel connects the coil slot and the earphone slot to transmit the high-frequency alternating current induced by the secondary coil to the receiving coil.

[0063] The metal channel can be made of copper, aluminum, iron or stainless steel. The coil slot is mainly used to reduce the coupling loss between the primary and secondary sides of the transformer, thereby improving the efficiency of the transformer and preventing the influence of external magnetic fields on the Tesla coil device.

[0064] The wireless headset also includes an earphone compartment cover, which can be covered on the earphone compartment by means of hinges, snaps, etc.

[0065] Specifically, the core of this embodiment is to achieve wireless charging of the earphone body by using a Tesla coil device. First, the main circuit board in the core component provides power to the Tesla coil device in the energy supply module. The Tesla coil device is based on the principles of electromagnetic induction and resonance. It inputs high-frequency AC power through the primary coil in the transmitting coil, thereby generating a strong electromagnetic field and inducing a high voltage in the secondary coil. The power is transmitted to the load through electromagnetic resonant coupling. The receiving coil in the earphone body then receives the power transmitted by the secondary coil and transmits the power to the receiving energy conversion module through resonant coupling or circuit connection. The receiving energy conversion module uses switching power supply devices (such as DC-DC converters, switching regulators) and isolation devices such as LC low-pass filters to reduce the frequency and stabilize the induced high-frequency AC voltage or the received high-frequency AC voltage to avoid interference with other circuit components and signals of the earphone. Finally, the earphone body converts the AC power into DC power through a bridge rectifier and stores it in a rechargeable energy storage battery.

[0066] When the earbuds start working, the energy storage battery begins to power the earbuds. The internal components of the battery, including the Bluetooth chip, audio decoder, and amplifier, demodulate and process the signal, converting it into information and producing sound. If the earbuds are placed near the earbuds, they can be charged continuously. For extended periods of use, they can be charged while in use, without having to disconnect the earbuds and place them in the earbuds compartment for recharging.

[0067] The earphone body is preferably a fully enclosed structure, and the bottom of the ear handle is a metal conductive surface so that the high-frequency electromagnetic field can pass through the metal conductive surface and be transmitted to the receiving coil. The number of turns and parameters of the transmitting coil and the receiving coil are the same.

[0068] The Tesla coil device also includes a heat sink mounted within the earphone compartment and in contact with the field-effect transistor. After receiving electrical energy from the main circuit board, the Tesla coil device generates high-frequency electromagnetic oscillations based on the principle of electromagnetic resonant coupling and energy transfer between the primary and secondary coils. The field-effect transistor is used as a component to induce a high-frequency AC voltage in the secondary coil, which then transmits the electromagnetic energy through a metal channel. The heat sink absorbs heat from the field-effect transistor during operation, reducing its temperature.

[0069] The wireless earphones with air charging described in this embodiment use a Tesla coil device to wirelessly charge the earphones, which can achieve long-term battery life of the earphones. This solves the problem of traditional wireless earphones having frequent charging times, requiring the charging interface to be strictly aligned, and the earphones must be precisely placed in a specific area of ​​the charging compartment, otherwise they cannot be charged or the efficiency drops sharply.

[0070] These wireless earbuds can be charged anywhere, eliminating the need for plugging and unplugging, and offer a high degree of charging flexibility, eliminating the cumbersome operation and the need to precisely position the earbuds for charging. Because they lack ports, these earbuds offer a strong seal and a higher waterproof rating, extending their lifespan and preventing issues like port damage and corrosion from liquids.

[0071] As a preferred technical solution, the wireless headset further includes a controller, which is used to obtain a real-time distance between the headset body and the Tesla coil device and adjust the output power of the Tesla coil device according to the real-time distance.

[0072] The output power P out =P max ·(1-e - α·d)·η(f); where P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

[0073] Specifically, the frequency matching efficiency function Where f represents the current operating frequency and f0 represents the initial resonant frequency.

[0074] This output power function formula is used to dynamically adjust the transmission power of the Tesla coil device. It comprehensively considers the two core factors of distance attenuation and frequency matching efficiency, and can ensure efficient and safe energy transmission under different working conditions (such as movement of the receiving end and load changes).

[0075] like Figure 5 As shown, a method for controlling a wireless headset with air charging in one embodiment of the present invention is applied to the wireless headset with air charging, and includes the following steps:

[0076] S1, outputting an induced voltage through a Tesla coil device and transmitting the induced voltage to a receiving coil through resonant coupling.

[0077] The Tesla coil device includes a primary coil and a secondary coil. The secondary coil induces a high voltage and transmits electrical energy to a receiving coil in the earphone body through electromagnetic resonance coupling.

[0078] S2, receiving electric energy through the receiving coil and transmitting the electric energy to the receiving and energy conversion module.

[0079] The receiving coil in the earphone body can transfer electrical energy to the receiving energy conversion module through resonant coupling.

[0080] S3, the receiving and converting module performs frequency reduction and voltage stabilization on the induced AC power, and transmits the AC power after frequency reduction and voltage stabilization to the rectifier module.

[0081] Since frequency reduction and voltage stabilization of high-frequency alternating current are conventional technical means in this field, they will not be described in detail here.

[0082] S4, the received AC power is rectified by the rectifier module and sent to the energy storage battery for energy storage.

[0083] Specifically, the core of this embodiment is to achieve wireless charging of the earphone body by using a Tesla coil device. First, the main circuit board in the core component provides power to the Tesla coil device in the energy supply module. The Tesla coil device is based on the principles of electromagnetic induction and resonance. It inputs high-frequency AC power through the primary coil in the transmitting coil, thereby generating a strong electromagnetic field and inducing a high voltage in the secondary coil. The power is transmitted to the load through electromagnetic resonant coupling. The receiving coil in the earphone body then receives the power transmitted by the secondary coil and transmits the power to the receiving energy conversion module through resonant coupling or circuit connection. The receiving energy conversion module uses switching power supply devices (such as DC-DC converters, switching regulators) and isolation devices such as LC low-pass filters to reduce the frequency and stabilize the induced high-frequency AC voltage or the received high-frequency AC voltage to avoid interference with other circuit components and signals of the earphone. Finally, the earphone body converts the AC power into DC power through a bridge rectifier and stores it in a rechargeable energy storage battery.

[0084] When the earbuds start working, the energy storage battery begins to power the earbuds. The internal components of the battery, including the Bluetooth chip, audio decoder, and amplifier, demodulate and process the signal, converting it into information and producing sound. If the earbuds are placed near the earbuds, they can be charged continuously. For extended periods of use, they can be charged while in use, without having to disconnect the earbuds and place them in the earbuds compartment for recharging.

[0085] As a preferred technical solution, Figure 6 As shown, the wireless headset control method further includes:

[0086] S5, obtaining the real-time distance between the headset body and the Tesla coil device.

[0087] S6, adjusting the output power of the Tesla coil device according to the real-time distance.

[0088] The output power P out =P max ·(1-e - α·d)·η(f); where P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

[0089] The maximum transmit power is typically determined by hardware design (such as the power capacity of a Tesla coil) and safety standards (such as FCC (Federal Communications Commission) radiation limits). It serves as a benchmark for adjusting the output power of wireless headphones to ensure that the system operates within a safe range.

[0090] The real-time distance can be understood as the real-time distance between the transmitter and the receiver, that is, the real-time distance between the headset and the Tesla coil device, which can be measured by the time-of-flight (ToF) sensor. Since the electromagnetic field strength decays with the square of the distance as the real-time distance increases, the exponential term e is required. - α·d compensates for attenuation. The distance attenuation coefficient characterizes the effect of distance on power attenuation. Its empirical value is 0.1-0.3 and can be calibrated experimentally. It is primarily used to adjust the attenuation rate of the exponential term. The larger α is, the more significant the impact of distance changes on power. It also balances energy transmission efficiency and system energy consumption, avoiding energy waste caused by overcompensation.

[0091] After obtaining the output power, the controller adjusts the excitation voltage provided by the main circuit board to the Tesla coil device according to the output power, thereby adjusting the output power of the Tesla coil device according to the real-time distance.

[0092] As a preferred technical solution, the frequency matching efficiency function Where f represents the current operating frequency, and f0 represents the initial resonant frequency. This initial resonant frequency is determined by the parameters of the transmitter LC circuit. When f ≈ f0, η(f) achieves maximum efficiency. When the current operating frequency f deviates from f0, efficiency drops sharply, requiring dynamic frequency tracking (e.g., a phase-locked loop (PLL)) to adjust f to maintain high efficiency.

[0093] As a preferred technical solution, the current operating frequency Where, e(t) represents the frequency error (i.e., the deviation between the reference frequency and the actual frequency), K p , K i , K d They represent proportional gain, integral gain, and differential gain respectively.

[0094] Based on the current operating frequency formula It uses a phase-locked loop (PLL) to synchronize the frequency between the transmitter and the receiver, and dynamically adjusts the K p , K i , K d , which can allocate sub-bands f for different headphones i =f0+Δf·i; where f i represents the sub-band of the i-th earphone, and Δf represents the frequency band interval.

[0095] As a preferred technical solution, the controller is provided with an objective function for maximizing the charging efficiency η while minimizing the electromagnetic radiation E. The objective function is specifically expressed as: Among them, Q1 and Q2 represent the quality factors of the transmitter and receiver respectively. f0' represents the natural resonant frequency, which is determined by the corresponding LC circuit parameters, and Δf' represents the half-power bandwidth. Generally speaking, the higher the quality factor value, the stronger the system energy storage capacity, but too high a quality factor value will lead to a narrow bandwidth and be sensitive to frequency offset. Charging efficiency maximization function It is used to quantify the efficiency of energy transmission from the transmitter to the receiver and minimize energy loss by optimizing the parameters of the resonant system.

[0096] It can be understood as a resonant matching term, and reaches its maximum value when Q1=Q2. It can be understood as a frequency detuning term. When the current operating frequency f deviates from f0, the efficiency drops sharply.

[0097] Electromagnetic radiation minimization function It is used to quantify the radiation field strength in space to ensure compliance with electromagnetic safety standards. Here, I represents the transmitting coil current (unit: A), the square of the current indicates that radiation increases exponentially with power, and ε represents the vacuum dielectric constant.

[0098] Increasing the quality factor and transmitting coil current increases efficiency, but also increases radiation. In practical applications, the actual operating frequency and transmitting coil current can be dynamically adjusted based on the objective function to maximize charging efficiency η while minimizing electromagnetic radiation E. This maximizes charging efficiency while ensuring electromagnetic safety.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A wireless headset with air charging, comprising a headset body, characterized in that: The earphone body includes a receiving coil, a receiving energy conversion module, a rectifier module and an energy storage battery. The wireless earphone also includes: A Tesla coil device, configured to output an induced voltage and transmit the induced voltage to a receiving coil via resonant coupling; Wherein, the receiving coil is used to receive electrical energy and transmit the electrical energy to the receiving and energy conversion module; The receiving and converting module is used to reduce the frequency and stabilize the voltage of the induced AC power, and transmit the AC power after the frequency reduction and voltage stabilization to the rectifier module; The rectifier module is used to rectify the received alternating current and send it to the energy storage battery for energy storage.

2. The wireless headset with air charging according to claim 1, characterized in that: The wireless headset also includes: The earphone compartment has a main circuit board at the bottom for providing power to the Tesla coil device; Wherein, the Tesla coil device is installed in the earphone compartment.

3. The wireless headset with air charging according to claim 2, characterized in that: The earphone compartment is provided with an earphone slot for storing the earphone body, and the side wall of the earphone slot is provided with a coil slot. The Tesla coil device includes: a transmitting coil, disposed in the coil slot; A metal channel connects the coil slot and the earphone slot and is used to transmit the high-frequency alternating current induced by the secondary coil to the receiving coil.

4. The wireless headset with air charging according to claim 3, characterized in that: The wireless headset also includes a controller, which is used to obtain a real-time distance between the headset body and the Tesla coil device and adjust the output power of the Tesla coil device according to the real-time distance.

5. The wireless headset with air charging according to claim 4, characterized in that: The output power P out =P max ·(1-e - α·d)·η(f); Among them, P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

6. A method for controlling a wireless headset with air charging, applied to the wireless headset with air charging according to any one of claims 1 to 5, characterized in that: The wireless headset control method includes: Outputting an induced voltage through a Tesla coil device and transmitting the induced voltage to a receiving coil through a resonant coupling method; Receive electrical energy through a receiving coil and transmit the electrical energy to a receiving and energy conversion module; The AC power generated by the AC is reduced in frequency and stabilized by the receiving and converting module, and then the reduced in frequency and stabilized AC power is transmitted to the rectifier module. The received AC power is rectified by the rectifier module and sent to the energy storage battery for energy storage.

7. The method for controlling a wireless headset with air charging according to claim 6, wherein: The wireless headset control method further includes: Get the real-time distance between the headset and the Tesla coil device; The output power of the Tesla coil device is adjusted according to the real-time distance.

8. The method for controlling a wireless headset with air charging according to claim 7, wherein: The output power P out =P max ·(1-e - α·d)·η(f); Among them, P out Indicates output power, P max represents the maximum transmission power, e represents the natural constant, α represents the distance attenuation coefficient, d represents the real-time distance, and η(f) represents the frequency matching efficiency function used to reflect the frequency band characteristics of the resonant coupling.

9. The method for controlling a wireless headset with air charging according to claim 8, wherein: The frequency matching efficiency function Where f represents the current operating frequency and f0 represents the initial resonant frequency.

10. The method for controlling a wireless headset with air charging according to claim 9, wherein: The current operating frequency Where, e(t) represents the frequency error, K p , K i , K d They represent proportional gain, integral gain, and differential gain respectively.

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