Composite magnetic potential type flux orthogonal information and energy simultaneous transmission technology for penetrating high-attenuation medium

Abstract

The invention particularly relates to a composite magnetic potential type coupler. The composite magnetic potential type coupler comprises a primary side magnetic potential type coupler and a secondary side magnetic potential type coupler which are arranged in a symmetrical structure; the primary side magnetic potential type coupler comprises an electric energy transmitting coil arranged in the center, and the electric energy transmitting coil is covered with a magnetizer. A plurality of communication coils are uniformly distributed on the periphery of the electric energy transmitting coil; a permanent magnet covers the communication coil; the secondary side magnetic potential type coupler comprises an electric energy receiving coil arranged in the center, and the electric energy receiving coil is covered with a magnetizer. A plurality of communication coils are uniformly distributed on the periphery of the electric energy receiving coil; and a permanent magnet covers the communication coil. According to the scheme, high-penetrability magnetic field signals are used as transmission media of power supply and communication channels, so that a reliable and stable wireless information and energy simultaneous transmission function is realized.

Description

Technical Field

[0001] This invention relates to the field of wireless signal-energy simultaneous transmission technology, specifically to a composite magnetic flux orthogonal signal-energy simultaneous transmission technology for penetrating high-attenuation media. Background Technology

[0002] Among related technologies, wireless simultaneous energy and signal transmission technology has become an important research direction in the fields of the Internet of Things (IoT), smart devices, and new energy in recent years. This technology solves the contact safety issues associated with traditional wired connections by simultaneously transmitting energy and information through the same wireless channel. It breaks through the boundaries of traditional wireless communication and wireless charging, achieving coordinated transmission of energy and signals, and is suitable for scenarios requiring continuous power supply and real-time data interaction, such as the IoT and mobile devices. The advantages of this technology include three aspects: first, it solves the problem of interference between high-power wireless energy transmission and low-power communication signals under highly integrated conditions; second, it solves the problem of high-power power transmission and improves transmission efficiency; and third, it solves the problem of improving data communication rates.

[0003] In current mainstream technologies, energy and information transmission are achieved through dual transmission media. The first medium uses a magnetic field to transmit electrical energy, enabling high-power and high-efficiency power transmission. The second medium uses electric fields, electromagnetic waves, or lasers to transmit high-speed communication signals. Because the two transmission media are orthogonal in their physical properties, the power supply channel and the communication channel do not interfere with each other, enabling high-power power transmission and high-speed data transmission.

[0004] However, this technology has a specific application scenario, such as implantable medical electronics, UAV (Unmanned Aerial Vehicle) onboard devices, and UUV (Unmanned Underwater Vehicle) onboard devices. In these cases, the receiver is installed within a sealed, high-attenuation dielectric material. This prevents the secondary medium used in existing technologies from penetrating the material, hindering cross-medium communication. The main reason is that high-attenuation dielectrics can form equipotential interfaces, shielding electric fields or electromagnetic wave signals; while the sealed structure blocks optical media such as lasers, preventing the formation of a communication link.

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

[0006] This invention relates to a composite magnetic susceptibility flux orthogonal signal-power simultaneous transmission technology for penetrating high-attenuation media, and provides a composite magnetic susceptibility coupler. By adopting a composite magnetic susceptibility architecture, it realizes the transmission medium of highly penetrating magnetic field signals as power supply and communication channels, thereby achieving reliable and stable wireless signal-power simultaneous transmission functions, and thus overcoming the defects existing in the prior art to a certain extent.

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

[0008] According to a first aspect of the present invention, a composite magnetic susceptibility flux orthogonal signal-energy simultaneous transmission technology for penetrating high-attenuation media is provided, comprising: a composite magnetic susceptibility coupler, including a primary-side magnetic susceptibility coupler and a secondary-side magnetic susceptibility coupler arranged in a symmetrical structure; The primary-side magnetic coupling includes a power transmitting coil located at the center, which is covered with a magnetic conductor; multiple communication coils are evenly distributed around the power transmitting coil; and the communication coils are covered with permanent magnets. The secondary-side magnetic coupling includes a power receiving coil located at the center, which is covered with a magnetic conductor; multiple communication coils are evenly distributed around the power receiving coil; and the communication coils are covered with permanent magnets. The communication coil includes an equal number of communication receiving coils and communication transmitting coils based on a differential mechanism, used to realize the transmission and reception of full-duplex communication signals; the electrical flux of the power transmitting coil and the communication flux of the information transmitting coil are orthogonal.

[0009] In some exemplary embodiments, the communication coil is disposed in close contact with the power transmitting coil / power receiving coil.

[0010] In some exemplary embodiments, a gap is provided between the communication coil and the power transmitting / receiving coil.

[0011] In some exemplary embodiments, the magnetic field lines of the permanent magnet radiate in the same direction as the electrode direction of the drive signal of the communication transmitting coil.

[0012] In some exemplary embodiments, the driving signal for the signal transmitting coil is a unipolar pulse electrical signal.

[0013] In some exemplary embodiments, the information transmitting coil is connected to a modulation circuit, which includes a differential-to-single-ended circuit, a pulse modulation unit, and a pulse gain circuit connected in sequence. The communication receiving coil is connected to a demodulation circuit, which includes a pulse signal sensing circuit, a pulse demodulation circuit, and a single-ended to differential circuit connected in sequence; the pulse signal sensing circuit includes a rising edge pulse magnetic field sensing circuit and a falling edge pulse magnetic field sensing circuit.

[0014] In some exemplary embodiments, the power transmitting coil is connected to an excitation circuit; the excitation circuit is a bridge chopper circuit or a ZVS circuit. The power receiving coil is connected to a receiving and rectifying circuit; the receiving and rectifying circuit is a bridge rectifier circuit or a synchronous rectifier circuit.

[0015] According to a second aspect of the present invention, a composite magnetic susceptibility flux orthogonal signal-energy simultaneous transmission technology for penetrating high-attenuation media is provided, comprising: a composite magnetic susceptibility coupler, including a primary-side magnetic susceptibility coupler and a secondary-side magnetic susceptibility coupler arranged in a symmetrical structure; The primary-side magnetic coupling includes a power transmitting coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power transmitting coil; each communication coil is covered with a permanent magnet. The secondary-side magnetic coupling includes a power receiving coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power receiving coil; each communication coil is covered with a permanent magnet. The communication coil includes an equal number of communication receiving coils and communication transmitting coils based on a differential mechanism, used to realize the transmission and reception of full-duplex communication signals; the electrical flux of the power transmitting coil and the communication flux of the information transmitting coil are orthogonal.

[0016] In some exemplary embodiments, the size S of the composite magnetic coupling is... power With the transmission power P of the designed device out The maximum air gap spacing d shows a positive correlation, including:

[0017] Where C represents the permeability of the magnetic material, α represents the air gap attenuation coefficient of the coupler, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

[0018] In some exemplary embodiments, the physical size S of the communication coil com The relationship with the voltage level V and the maximum air gap spacing d is positively correlated, including:

[0019] in, R The value represents the equivalent resistance at the receiving end, C represents the permeability constant of the magnetic material, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

[0020] The composite magnetic coupling provided in the embodiments of the present invention features a symmetrical primary-side and secondary-side magnetic coupling, with a communication coil positioned around the power supply coil (power transmitting / receiving coil). A magnetically conductive material covers the power supply coil, and a permanent magnet covers the communication coil. This ensures the orthogonal magnetic distribution of the power supply and communication coils through the magnetically conductive and permanent magnets, achieving both magnetic flux orthogonality and signal spectrum orthogonality in the composite magnetic field channel. This effectively avoids the frequency crosstalk problem faced by simultaneous power and signal transmission technologies, significantly improving the reliability of information transmission under high-power conditions. Furthermore, it isolates the magnetic flux of wireless power supply and wireless communication and inherently shields against magnetic field leakage generated by the coil. Therefore, as a wireless power and signal transmission device, the present invention possesses the ability to suppress electromagnetic leakage and is suitable for application environments with stringent requirements regarding electromagnetic leakage.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0023] Figure 1 This schematic diagram illustrates the structure of a composite magnetic coupling according to an exemplary embodiment of the present invention. Figure 2 schematically illustrates the effect of a composite magnetic position coupler on suppressing leakage magnetic fields according to an exemplary embodiment of the present invention; Figure 3 This schematic diagram illustrates a distributed structure of a composite magnetic coupling according to an exemplary embodiment of the present invention. Figure 4 This schematic diagram illustrates a modulation circuit topology according to an exemplary embodiment of the present invention. Figure 5 This schematic diagram illustrates a demodulation circuit structure according to an exemplary embodiment of the present invention. Figure 6 This diagram schematically illustrates the magnetic flux distribution of a composite magnetic susceptibility coupler according to an exemplary embodiment of the present invention. Figure 7 The schematic diagram illustrates a signal modulation circuit according to an exemplary embodiment of the present invention; Figure 8This diagram schematically illustrates the timing sequence of an FPGA modulation logic for a 2.5 Mbps communication transmission signal, as per an exemplary embodiment of the present invention. Figure 9 This diagram schematically illustrates the timing sequence of an FPGA modulation logic for a 5Mbps communication transmission signal, as per an exemplary embodiment of the present invention. Figure 10 The schematic diagram illustrates the principle of a pulse signal demodulation circuit according to an exemplary embodiment of the present invention; Figure 11 This diagram schematically illustrates a 2.5 Mbps communication rate signal demodulation and restoration timing according to an exemplary embodiment of the present invention. Figure 12 The diagram illustrates a 5Mbps communication rate signal demodulation and restoration timing according to an exemplary embodiment of the present invention.

[0024] Figure 13 This schematic diagram illustrates the structure of a composite magnetic coupling with an overlapping structure, as exemplified by an embodiment of the present invention. Figure 14 The schematic diagram illustrates a composite magnetic coupling stacked structure according to an exemplary embodiment of the present invention.

[0025] Reference numerals in the attached figures: 1. High-attenuation medium; 2. Primary-side magnetic coupling; 3. Power transmitting coil; 4. Magnetic conductor; 5. Communication transmitting coil; 6. Communication receiving coil; 7. Permanent magnet; 8. Power receiving coil; 9. Secondary-side magnetic coupling; 10. Power supply coil; 11. Communication coil. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0027] Furthermore, the accompanying drawings are merely illustrative of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0028] In related technologies, wireless signal-to-energy communication technology faces a unique scenario: the receiver is installed within a sealed, high-attenuation dielectric material. This prevents the secondary medium used in existing technologies from penetrating the material, hindering cross-medium communication. The primary reason is that high-attenuation media can form an equipotential interface, shielding electric fields or electromagnetic signals; conversely, the sealed structure blocks optical media such as lasers, preventing the formation of a communication link. Examples include implantable medical electronics, UAV (Unmanned Aerial Vehicle) onboard devices, and UUV (Unmanned Underwater Vehicle) onboard equipment.

[0029] To address the shortcomings and deficiencies of existing technologies, this exemplary embodiment provides a composite magnetic sizing coupler for cross-medium wireless simultaneous transmission of signal and power. Both media in the channels utilize power magnetic field transmission, enabling synchronous transmission of electrical information through highly attenuated media. Furthermore, the coupler employs multiple magnetic sizing antennas to ensure orthogonal magnetic flux between the power supply and communication channels, effectively suppressing interference from the power supply magnetic field on the communication magnetic field.

[0030] refer to Figure 1 As shown, the composite magnetic susceptibility coupler includes a primary-side magnetic susceptibility coupler 1 and a secondary-side magnetic susceptibility coupler 9 arranged in a symmetrical structure. The two parts can be respectively arranged on both sides of the high-attenuation medium 1.

[0031] The primary-side magnetic coupling 1 includes a centrally located power transmitting coil 3 covered with a magnetic conductor 4; multiple communication coils are evenly distributed around the power transmitting coil 3; and permanent magnets 7 are covered on the communication coils. The secondary-side magnetic coupling 9 includes a centrally located power receiving coil 8 covered with a magnetic conductor 4; multiple communication coils are evenly distributed around the power receiving coil 8; and permanent magnets 7 are covered on the communication coils.

[0032] The communication coils include an equal number of differential-mechanism-based communication coils, including a communication transmitting coil 5 and a communication receiving coil 6, used to realize the transmission and reception of full-duplex communication signals. The magnetic flux of the power transmitting coil and the communication magnetic flux of the information transmitting coil are orthogonal. Each communication coil is equipped with a permanent magnet 7.

[0033] Specifically, the primary and secondary composite magnetic couplers have similar structures and are symmetrically arranged. The power transmitting coil converts the alternating current from the power transmitting end of the system into an alternating magnetic field, which is radiated to the power transmitting coil. The power receiving coil induces the alternating magnetic field and generates an induced voltage, which is output to the downstream circuit. The magnetic conductor increases the effective magnetic flux between the transmitting and receiving coils, improves transmission power, blocks the diffusion path of the edge magnetic field, and reduces interference to the communication coil and circuit.

[0034] The primary and secondary communication transmitting and receiving coils, together with the rear permanent magnet, form a novel communication antenna. The transmitting and receiving coils are used to transmit and receive full-duplex communication signals on both the primary and secondary sides. The transmitting coil converts the signal output from the modulation circuit into a magnetic signal, which is then transmitted to the receiving coil. The receiving coil senses the magnetic signal and converts it into a voltage signal, which is then transmitted to the demodulation circuit.

[0035] Specifically, permanent magnets are used to enhance the magnetic field signals transmitted or received by the coil. It is important to note that the orientation of the permanent magnet's magnetic poles (i.e., the direction of magnetic field line radiation) should be consistent with the direction of the electrodes that drive the communication transmission coil to transmit signals.

[0036] Meanwhile, the constant magnetic field of the permanent magnet pointing towards the power transmission coil can further suppress the interfering magnetic field leaking from the power transmission coil, making the power flux and communication flux orthogonal and improving the anti-interference capability of the communication channel. The driving signal adapted to this magnetic positioning type communication antenna topology is a unipolar pulse electrical signal, implemented by the circuit topology.

[0037] For example, the presence of a permanent magnet can limit the leakage of the wireless power supply magnetic field into the space where the communication channel is located. This is mainly manifested as follows: when the leakage magnetic field is in the same direction as the radial magnetic field of the permanent magnet, the permanent magnet will form a magnetic short-circuit effect with the leakage magnetic field, allowing the leakage magnetic field to enter the permanent magnet. At this time, the magnetic flux of the power supply leakage magnetic field is orthogonal to the communication magnetic flux. When the leakage magnetic field is in the opposite direction to the radial magnetic field of the permanent magnet, the permanent magnet will repel the leakage magnetic field, causing it to re-enter the magnetic conductor of the power supply channel. At this time, only the communication magnetic field and the constant magnetic field of the permanent magnet exist within the interval between the transmitting and receiving coils, and these two magnetic fields are also orthogonal. This physical effect allows the power supply magnetic field and the communication magnetic field to not interfere with each other in a compact coil distribution space. Refer to Figure 2 for a schematic diagram of the composite magnetic position coupler suppressing the leakage magnetic field, where... Figure 2a This diagram illustrates the leakage magnetic field of the power supply coupling coil in a non-magnetic-position design. Figure 2b A schematic diagram showing that the leakage magnetic field is in the same direction as the radial magnetic field of the permanent magnet; Figure 2c This illustrates that the leakage magnetic field is in the opposite direction to the radial magnetic field of the permanent magnet.

[0038] For example, the information transmitting coil is connected to a modulation circuit. The modulation circuit includes a differential-to-single-ended circuit, a pulse modulation unit, and a pulse gain circuit connected in sequence.

[0039] The communication receiving coil is connected to a demodulation circuit. The demodulation circuit includes a pulse signal sensing circuit, a pulse demodulation circuit, and a single-ended to differential circuit connected in sequence; the pulse signal sensing circuit includes a rising edge pulse magnetic field sensing circuit and a falling edge pulse magnetic field sensing circuit.

[0040] For example, the power transmitting coil is connected to an excitation circuit; the excitation circuit is a bridge chopper circuit or a ZVS circuit. The power receiving coil is connected to a receiving and rectifying circuit; the receiving and rectifying circuit is a bridge rectifier circuit or a synchronous rectifier circuit.

[0041] For example, the driving signal for the signal transmitting coil is a unipolar pulse electrical signal.

[0042] Specifically, the circuit used to excite the power transmitting coil of this invention can employ a bridge chopper circuit or a ZVS circuit to generate a narrowband or fixed-frequency excitation power supply, causing the power transmitting coil in the coupler to generate an alternating magnetic field. The power receiving and rectifying coil circuit can employ a bridge rectifier circuit or a synchronous rectifier circuit to achieve the conversion of electrical energy from AC to DC. Regarding power transmission, this invention can employ a wide range of flexible technologies.

[0043] The circuit used to excite the communication coil of this invention requires a dedicated unipolar pulse circuit. The purpose of this circuit is to excite the communication transmitting coil to generate a unipolar pulse magnetic field signal, which can be amplified by the constant magnetic field of the permanent magnet, thereby improving communication reliability. Simultaneously, because the electric energy magnetic field uses a low-frequency (tens of kHz) fixed-frequency or narrow-band signal, while the unipolar pulse magnetic field signal has an ultra-wideband spectrum, the unipolar pulse magnetic field signal and the electric energy output magnetic field are orthogonal in the frequency domain.

[0044] This invention proposes a modulation circuit for an excitation signal transmitting coil. This circuit modulates digital signal waveforms with different transmission rates into small-pulse-width pulse signals, and the amplified pulse signals drive the information transmitting coil. The demodulation circuit analyzes the induced pulse signals through a logic comparison circuit to determine the corresponding rising and falling edges of the signals, thus reconstructing the communication signal.

[0045] Frequency-domain orthogonal pulse modulation and demodulation circuits can be applied in transmitting and receiving terminals to achieve full-duplex communication.

[0046] refer to Figure 4 The diagram shows a signal modulation circuit and a schematic of the modulated signal. This circuit consists of a differential-to-single-ended converter, a pulse modulation unit, and a pulse gain circuit. The differential-to-single-ended converter converts the input differential signal into a single-ended signal. If the input signal itself is a single-ended signal, it can be directly connected to the pulse modulation unit. The pulse modulation unit modulates the input single-ended transmit signals (TX) at different rates into a pulse signal with a constant pulse width. The pulse signal is triggered by the rising and falling edges of the input signal. The gain circuit enhances the intensity of the modulated pulse signal, driving the coupler's communication coil to generate a higher-power communication magnetic field.

[0047] refer to Figure 5The diagram shows a signal demodulation circuit and the demodulated signal. This circuit consists of a pulse signal sensing circuit, a pulse demodulation circuit, and a single-ended to differential converter. The pulse signal sensing circuit converts the sensed pulse signal into a digital level signal and outputs it to the pulse demodulation circuit. The pulse demodulation circuit reconstructs the single-ended signal of the original data based on the rising and falling edge pulse signals. The single-ended to differential converter converts the single-ended signal into a differential signal; if the input signal itself is a single-ended signal, it can be output directly.

[0048] For example, in a pulse modulation and demodulation circuit, the spectral function of a rectangular pulse can be configured as follows: (1) in, τ It refers to the pulse width, or simply pulse broadband.

[0049] The normalized spectrum function can be expressed as: (2) The signal bandwidth is defined as the point where the peak power decreases to -3dB, meaning the power drops to half of its peak value. The formula is as follows: (3) Will exist f Performing a Taylor expansion at the point = 0 yields: (4) Substituting this into the formula, we obtain the -3dB bandwidth as: (5) Based on the above calculation process, it can be seen that the smaller the pulse width of the modulation signal, the wider the signal bandwidth, the higher the ability to resist power fixed-frequency interference, and the orthogonality of the spectrum of wireless communication signal and power supply signal can be achieved.

[0050] In summary, this invention can achieve orthogonality of magnetic flux and signal spectrum during simultaneous signal and energy transmission from two aspects: composite magnetic coupling and communication signal modulation, effectively improving the anti-interference capability of the communication channel.

[0051] For example, refer to Figure 3 As shown, the composite magnetic coupler is centered on the power supply coil, with communication coils distributed around it according to the number of communication channels. Magnetic conductors and permanent magnets are distributed and installed at the power supply and communication coils. To further improve the common-mode noise suppression capability of the communication topology, both the transmitting and receiving communication coils adopt a differential design, that is, the single-ended transmitting signal is modulated into a bipolar differential signal, and then radiated to the receiving end through a differential antenna.

[0052] In some exemplary embodiments, a gap is provided between the communication coil and the power transmitting coil / power receiving coil.

[0053] Specifically, during operation, the distribution of the magnetic field signal within the coupler and air gap is as follows: Figure 6 As shown. In a cross-medium wireless communication device, a permanent magnet generates a static magnetic field B. DC The communication coil generates a pulse communication signal B under the excitation of a pulse voltage. AC (t), the formula for the communication magnetic field is expressed as: (6) Among them, when B AC ( t It must be a unipolar magnetic field, and B AC ( t )and B DC When they are in the same direction, the magnetic field strength of the communication signal will be enhanced by the permanent magnet, thereby improving the signal-to-noise ratio of the communication signal.

[0054] Alternatively, in some exemplary embodiments, the communication coil is disposed in close contact with the power transmitting coil / power receiving coil.

[0055] Specifically, there may be no gap between the magnetic conductor covering the power supply coil and the permanent magnet covering the communication coil. For example, a unipolar pulse modulation and demodulation circuit based on an operational amplifier and an FPGA device can be provided.

[0056] For details, please refer to Figure 7 As shown, in the modulation circuit, the differential-to-single-ended converter chip is MAX3362, which can convert the input differential signal into a single-ended signal compatible with the FPGA chip. The FPGA uses mature chips such as Altera's EP4CE6E22C8 and Ziguang Tongchuang's PGC4KD to run the signal modulation logic, outputting a TTL or CMOS level pulse signal based on the edge of the TX signal as the trigger condition. The gain chip uses a gate driver to convert the input TTL drive signal into a 15V power drive signal. This embodiment uses SGM48524 from Sanbang Microelectronics to enhance the driving capability of the pulse signal; the gain chip output is connected to the communication coil. The SGM48524 has dual independent drive units, and a single chip can achieve dual-channel pulse gain output. This circuit can also be implemented using a known high-frequency power amplifier circuit for penetrating thick attenuating media. When the signal to be wirelessly transmitted is a single-ended signal, it can be directly connected to the FPGA chip.

[0057] It's important to note that the FPGA's clock speed determines the width of the output pulse. This width should be less than the duration of the data communication symbol. Therefore, when the received signal is at a high data rate, the FPGA needs to operate at a high-frequency clock speed. (Reference) Figure 8 , Figure 9 The figures shown are the modulation logic timing diagrams for continuously transmitting 10 messages when the FPG is operating at 50MHz and the TX communication rate is 2.5Mbps and 5Mbps, respectively.

[0058] As can be seen from the figure, although the duration of the TX symbol changes with the communication rate, the pulse width of the modulated pulse signal remains fixed. In this embodiment, the pulse width is 60ns, and the signal bandwidth can be calculated to be 7.4MHz according to formula (3), which is much higher than the known power supply channel signal bandwidth (both the chopper scheme and the ZVS scheme are in the kHz range).

[0059] like Figure 10 The pulse signal demodulation circuit shown in the diagram induces a communication magnetic signal radiated by the information transmitting coil in the communication receiving coil, generating a pulse voltage across the coil. This voltage is mixed with induced noise from space, therefore an RC filter circuit needs to be connected in series in the circuit. Considering that the pulse signal modulated in this invention is a high-frequency signal, while the main interference in space comes from low-frequency power transmission signals, a high-pass filter circuit topology is adopted for the RC filter circuit. In the diagram, R1, C1, R2, and C2 respectively form the high-pass filter circuits for two pulse induction circuits. The cutoff frequency of the filter circuit can be designed to be the highest frequency point of the wireless power supply magnetic field spectrum. The filtered output signal drives a switching circuit composed of transistors to input a pulse signal opposite to the induced signal to the FPGA. After processing by the FPGA logic, the original communication signal is restored. The filter circuit adopts an RC high-pass filter circuit, and the component parameters can be calculated based on the cutoff frequency. In addition, there is a trigger response time for FPGA timing triggers, which can be one clock cycle, i.e., 1 / 50MHz = 20ns.

[0060] refer to Figure 11 , Figure 12 The figures shown are the modulation logic timing diagrams for receiving pulse signals and restoring information when the FPGA is operating at 50MHz and the RX communication rate is 2.5Mbps and 5Mbps, respectively.

[0061] In another exemplary embodiment, a composite magnetic susceptibility coupler with an overlapping structure is provided, including a primary-side magnetic susceptibility coupler and a secondary-side magnetic susceptibility coupler arranged in a symmetrical structure; The primary-side magnetic coupling includes a power transmitting coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power transmitting coil; each communication coil is covered with a permanent magnet. The secondary-side magnetic coupling includes a power receiving coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power receiving coil; each communication coil is covered with a permanent magnet. The communication coil includes an equal number of communication receiving coils and communication transmitting coils based on a differential mechanism, used to realize the transmission and reception of full-duplex communication signals; the electrical flux of the power transmitting coil and the communication flux of the information transmitting coil are orthogonal.

[0062] Specifically, refer to Figure 13 As shown, the composite magnetic coupling includes a power supply coil 10, and a magnetic conductor 4 covers the power supply coil 10. Above the power supply coil 10 and above the magnetic conductor 4, a plurality of communication coils 11 are arranged, and a permanent magnet 7 is arranged on each communication coil 11.

[0063] refer to Figure 14 As shown, the communication coil may include a communication receiving coil and a communication transmitting coil. Multiple communication receiving coils are arranged sequentially along the circumference above the power supply coil; multiple communication transmitting coils are also arranged sequentially along the circumference.

[0064] For details, please refer to Figure 13 As shown, the composite magnetic coupling employs an overlapped coil structure, spatially overlapping the communication coil and the power supply coil. The power supply coil is tightly wound with metal, and the magnetic circuit around the coil is horizontally radially distributed. According to the configuration of the permanent magnets shown in Figure 2, this magnetic circuit is orthogonal to the communication magnetic circuit, achieving the effect of mutual non-interference between power supply and communication, thus enabling the coupler to achieve an integrated design. Furthermore, this scheme achieves optimized physical dimensions while ensuring a certain radiation efficiency.

[0065] For example, in terms of power supply, the physical size S of the coupler power With the transmission power P of the designed device out It is related to the maximum air gap spacing d, and is also affected by the coupling efficiency of the coupler. k and power supply current frequency f The influence of these factors is as follows: (7) Where C represents the permeability of the magnetic material, α represents the air gap attenuation coefficient of the coupler, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

[0066] Communication coil physical dimensions S com The purpose is to transmit a level signal V. During transmission, it is also affected by the maximum air gap d, the coupling efficiency k, and the frequency of the communication signal. The relationship between them is as follows: (8) in, R The value represents the equivalent resistance at the receiving end, C represents the permeability constant of the magnetic material, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

[0067] In summary, the air gap spacing d has the greatest impact on the physical dimensions of the coupler coil.

[0068] For example, this coupler adopts a composite magnetic configuration architecture. The magnetic field generated by wireless power supply is mainly radially distributed at the power supply coil. Because the coil itself has metallic properties, it shields the axially distributed magnetic field. The permanent magnet structure around the communication coil naturally repels or guides the radially distributed magnetic field, preventing it from interfering with the axial magnetic field of the communication field, thus improving the anti-interference capability of the communication magnetic field. Based on this excitation, the communication coil can be configured according to... Figure 14 Designed at the power supply coil, this invention reduces the size of the signal-energy coupling surface compared to existing technologies (where the communication coil / antenna needs to be spatially isolated from the power supply coil), enabling the device to be miniaturized.

[0069] To avoid interference from external radial magnetic fields in the communication field, the wireless spacing distance of the system device needs to be calculated and determined according to the following formula. The formula includes: (9) Where θ represents the angle between the axial and radial magnetic fields radiated by the coil, R represents the coil radius, r represents the coil inner diameter, and d represents the air gap spacing for simultaneous wireless signal transmission. Since the magnetic field lines are loops radiating from the N pole to the S pole, θ is greater than 0, meaning there are no absolutely perpendicular magnetic field lines. Therefore, in engineering implementation, θ is used as an approximate axial magnetic field component with a value less than a fixed value.

[0070] Therefore, at the communication coil design level, the coil radius R should satisfy the following expression: (10) For example, when a magnetic field with θ less than 10° is used as the axial magnetic field, the coil dimensions should satisfy the following formula: (11) in, l Indicates the width of the power supply coil. For example... Figure 14 As shown, the outer diameter of the communication coil must be smaller than the width of the power supply coil.

[0071] The composite magnetic coupling proposed in this invention has the following advantages: 1) Simultaneous orthogonality of magnetic flux and signal spectrum in the composite magnetic field channel effectively avoids the frequency crosstalk problem faced by the simultaneous transmission of information and energy, and effectively improves the reliability of information transmission under high power transmission conditions.

[0072] 2) Both the power supply channel and the communication channel use magnetic field transmission, which has high penetration and enables synchronous transmission of electrical energy and signals across high-loss media.

[0073] 3) The data modulation and demodulation mechanism directly targets the waveform of the communication signal. It belongs to the physical layer circuit-triggered modulation and demodulation technology. It does not require software programs or complex logic operations, so it can realize wireless communication with high transmission rate and low transmission delay.

[0074] 4) In this invention, the orthogonal magnetic configuration of the power supply coil and the communication coil is mainly achieved through magnetic conductors and permanent magnets. This device not only isolates the magnetic flux of wireless power supply and wireless communication, but also has the function of shielding the magnetic field leakage generated by the coil. Therefore, as a wireless signal-powered simultaneous transmission device, this invention has the ability to suppress electromagnetic leakage and is suitable for application environments with strict requirements for electromagnetic leakage, such as spacecraft and aircraft.

[0075] It should be noted that the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may, for example, be executed synchronously or asynchronously in multiple modules.

[0076] It should be noted that although several modules or units of the device for performing actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0077] Furthermore, the above figures are merely illustrative of exemplary embodiments according to the present invention and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0078] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0079] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is defined only by the appended claims.

Claims

1. A composite magnetic potential flux orthogonal signal-energy simultaneous transmission technology for penetrating high-attenuation media, characterized in that, include: A composite magnetic susceptibility coupler includes a primary-side magnetic susceptibility coupler and a secondary-side magnetic susceptibility coupler arranged in a symmetrical structure. The primary-side magnetic coupling includes a power transmitting coil located at the center, which is covered with a magnetic conductor; multiple communication coils are evenly distributed around the power transmitting coil; and the communication coils are covered with permanent magnets. The secondary-side magnetic coupling includes a power receiving coil located at the center, which is covered with a magnetic conductor; multiple communication coils are evenly distributed around the power receiving coil; and the communication coils are covered with permanent magnets. The communication coil includes an equal number of communication receiving coils and communication transmitting coils based on a differential mechanism, used to realize the transmission and reception of full-duplex communication signals; the magnetic flux of the power transmitting coil and the communication magnetic flux of the information transmitting coil are orthogonal.

2. The composite magnetic coupling according to claim 1, characterized in that, The communication coil is closely fitted with the power transmitting coil / power receiving coil.

3. The composite magnetic coupling according to claim 1, characterized in that, A gap is provided between the communication coil and the power transmitting / receiving coil.

4. The composite magnetic coupling according to claim 1, characterized in that, The magnetic field lines of the permanent magnet radiate in the same direction as the electrode direction of the driving signal of the communication transmitting coil.

5. The composite magnetic coupling according to claim 1, characterized in that, The driving signal for the signal transmitting coil is a unipolar pulse electrical signal.

6. The composite magnetic coupling according to claim 1, characterized in that, The information transmitting coil is connected to a modulation circuit, which includes a differential-to-single-ended circuit, a pulse modulation unit, and a pulse gain circuit connected in sequence. The communication receiving coil is connected to a demodulation circuit, which includes a pulse signal sensing circuit, a pulse demodulation circuit, and a single-ended to differential circuit connected in sequence. The pulse signal sensing circuit includes: a rising edge pulse magnetic field sensing circuit and a falling edge pulse magnetic field sensing circuit.

7. The composite magnetic coupling according to claim 1, characterized in that, The power transmitting coil is connected to an excitation circuit; the excitation circuit is a bridge chopper circuit or a ZVS circuit. The power receiving coil is connected to a receiving and rectifying circuit; the receiving and rectifying circuit is a bridge rectifier circuit or a synchronous rectifier circuit.

8. A composite magnetic potential flux orthogonal signal-energy simultaneous transmission technology for penetrating high-attenuation media, characterized in that, include: A composite magnetic susceptibility coupler includes a primary-side magnetic susceptibility coupler and a secondary-side magnetic susceptibility coupler arranged in a symmetrical structure. The primary-side magnetic coupling includes a power transmitting coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power transmitting coil; each communication coil is covered with a permanent magnet. The secondary-side magnetic coupling includes a power receiving coil disposed at the center, which is covered with a magnetic conductor; on the magnetic conductor, a plurality of uniformly distributed communication coils are disposed overlapping above the power receiving coil; each communication coil is covered with a permanent magnet. The communication coil includes an equal number of communication receiving coils and communication transmitting coils based on a differential mechanism, used to realize the transmission and reception of full-duplex communication signals; the magnetic flux of the power transmitting coil and the communication magnetic flux of the information transmitting coil are orthogonal.

9. The composite magnetic coupling according to claim 8, characterized in that, The size S of the composite magnetic coupling power With the transmission power P of the designed device out The maximum air gap spacing d shows a positive correlation, including: Where C represents the permeability of the magnetic material, α represents the air gap attenuation coefficient of the coupler, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

10. The composite magnetic coupling according to claim 8, characterized in that, Communication coil physical dimensions S com The relationship with the voltage level V and the maximum air gap spacing d is positively correlated, including: in, R The value represents the equivalent resistance at the receiving end, C represents the permeability constant of the magnetic material, and k represents the coupling efficiency of the coupler. f Indicates the frequency of the power supply current.

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