Multi-coil electromagnetic induction energy transfer system and control method thereof

Abstract

The invention relates to a multi-coil electromagnetic induction energy transfer system and a control method thereof. The multi-coil electromagnetic induction energy transfer system comprises an in-vitro part and an in-vivo part, wherein the in-vitro part comprises a plurality of in-vitro electromagnetic coils, a plurality of switch devices, a radio frequency transceiving device, an in-vitro control device and an in-vitro communication device; the in-vivo part comprises an in-vivo electromagnetic coil, an in-vivo communication device and an in-vivo control device. The plurality of extracorporeal electromagnetic coils are arranged in one or more columns, and the plurality of extracorporeal electromagnetic coils can be electromagnetically coupled with the intracorporeal electromagnetic coil. The in vivo communication device may wirelessly communicate with the in vitro communication device. The in-vivo control device can obtain the output voltage of the in-vivo electromagnetic coil, and the obtained output voltage of the in-vivo electromagnetic coil is sent to the in-vitro control device through the in-vivo communication device. The in-vitro control device can enable one or more of the plurality of in-vitro electromagnetic coils to work according to the motion state of the patient and the working state of the plurality of in-vitro electromagnetic coils.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and in particular to a multi-coil electromagnetic induction energy transmission system and a control method thereof. Background Art

[0002] The implantable neural electrical stimulation system is an important means to relieve chronic pain. It mainly transmits energy to the electrical stimulator implanted in the body through an external energy controller to support the electrical stimulation chip in the patient's body to generate electrical stimulation waveforms.

[0003] In the process of wireless energy transmission in vivo and in vitro, the wireless energy transmission is realized by electromagnetic coupling between the electromagnetic coil outside the body and the electromagnetic coil inside the body. In the existing products of wireless energy transmission in vivo and in vitro, a single coil is mainly used for wireless energy transmission.

[0004] However, this single-coil in-vivo and out-of-vivo wireless energy transmission product has two main problems: First, due to the inherent characteristics of magnetic field coupling, the size of the in-vivo electromagnetic coil and the in-vivo electromagnetic coil cannot be greatly different. If the difference between the in-vivo and out-of-vivo electromagnetic coils is too large, the coupling coefficient will be reduced, resulting in loss of transmission energy. This energy loss not only exists in the form of space radiation, but may also cause electromagnetic interference (EMI) problems and reduce the energy transmission efficiency of the entire system. More importantly, this single-coil in-vivo and out-of-vivo wireless energy transmission method limits the part implanted in the human body and cannot be further miniaturized, which causes certain limitations in practical applications. Second, the use of a single-coil energy transmission method means that the range of movement that the in-vivo and in-vivo electromagnetic coils can adapt to during the energy transmission process is relatively limited. Once a large offset occurs, the coupling may become weaker, which in turn reduces the energy coupling efficiency and affects the patient's experience.

[0005] Therefore, there is an urgent need to improve the in vivo and in vitro wireless energy transfer system to enhance the flexibility and adaptability of the system.

[0006] The above description of the background technology is only for facilitating an in-depth understanding of the technical solution of the present invention (such as the technical means used, the technical problems solved and the technical effects produced), and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0007] The present invention aims to provide a multi-coil electromagnetic induction energy transmission system and a control method thereof. The system includes a plurality of extracorporeal electromagnetic coils, which can be controlled by a plurality of switch devices to be turned off or on. The plurality of extracorporeal electromagnetic coils can be arranged in parallel in one or more rows, so that a single extracorporeal electromagnetic coil can be operated or a plurality of extracorporeal electromagnetic coils can be operated simultaneously as needed. In this way, when the intracorporeal electromagnetic coil moves to different positions, the working state of the extracorporeal electromagnetic coil can be flexibly adjusted to ensure the efficiency and stability of energy transmission. If the intracorporeal electromagnetic coil moves to a certain position, the corresponding extracorporeal electromagnetic coil can be turned on by controlling the switch device, thereby achieving efficient energy transmission.

[0008] According to an embodiment of the present invention, a multi-coil electromagnetic induction energy transmission system is provided, which includes: a plurality of in vitro electromagnetic coils, the plurality of in vitro electromagnetic coils are arranged in one or more columns, a plurality of switch devices, the plurality of switch devices are configured to be electrically connected to the plurality of in vitro electromagnetic coils one-to-one; a radio frequency transceiver device, which is electrically connected to the plurality of switch devices and is configured to be able to transmit high-frequency alternating current signals to the plurality of in vitro electromagnetic coils; an in vitro control device, which is configured to be electrically connected to the plurality of switch devices and the radio frequency transceiver device, respectively; an in vitro communication device, which is configured to be electrically connected to the in vitro control device; an in vivo electromagnetic coil, which is configured to be electromagnetically connected to the plurality of in vitro electromagnetic coils coupling, and capable of outputting a direct current signal; an in-vivo communication device, which is configured to wirelessly communicate with an in-vivo communication device; an in-vivo control device, which is configured to be electrically connected to the in-vivo electromagnetic coil and the in-vivo communication device, respectively, and is configured to obtain the output voltage of the in-vivo electromagnetic coil, and send the obtained output voltage of the in-vivo electromagnetic coil to the in-vivo control device through the in-vivo communication device; wherein the in-vivo control device is configured to: initialize the system; obtain the working status of multiple in-vivo electromagnetic coils; detect the patient's movement status; and according to the patient's movement status and the working status of the multiple in-vivo electromagnetic coils, make one or more of the multiple in-vivo electromagnetic coils work.

[0009] Preferably, the extracorporeal control device is further configured to: when initializing the system, operate each extracorporeal electromagnetic coil in a predetermined order; receive the output voltage of the intracorporeal electromagnetic coil from the intracorporeal control device; store the output power of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil, thereby constructing a first mapping table of the corresponding relationship between the output power of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil.

[0010] Preferably, the extracorporeal control device is further configured to: when initializing the system, make the extracorporeal electromagnetic coils work in groups of two or more in a predetermined order; receive the output voltage of the intracorporeal electromagnetic coils from the intracorporeal control device; store and construct a second mapping table of the correspondence between the output power of the extracorporeal electromagnetic coils in groups of two or more and the output voltage of the intracorporeal electromagnetic coils.

[0011] Preferably, the external control device is further configured as follows: when it is determined that the patient is in a stationary state, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil is operated according to a first mapping table; when it is determined that the patient is in a moving state, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil and one or more adjacent external electromagnetic coils are operated according to the first mapping table.

[0012] Preferably, the extracorporeal control device is further configured as follows: when it is determined that the patient is in a stationary state, an extracorporeal electromagnetic coil corresponding to the maximum output voltage of the intracorporeal electromagnetic coil is operated according to a first mapping table; when it is determined that the patient is in a moving state, two or more extracorporeal electromagnetic coils corresponding to the maximum output voltage of the intracorporeal electromagnetic coil are operated according to a second mapping table.

[0013] Preferably, the multi-coil electromagnetic induction energy transmission system includes an accelerometer and a gyroscope; the accelerometer and the gyroscope are electrically connected to an external control device respectively; the external control device is further configured to: obtain acceleration data from the accelerometer and data from the gyroscope; when no data from the gyroscope is detected and the acceleration data from the accelerometer is detected to include only gravity acceleration data, it is determined that the patient is in a static state; when changes are detected in the data from the gyroscope and / or in the acceleration data from the accelerometer, it is determined that the patient is in motion.

[0014] Preferably, the extracorporeal control device is further configured to: when it is determined that the patient is in a state of motion, determine whether the output voltage of the internal electromagnetic coil is greater than or equal to a predetermined threshold; when it is determined that the output voltage of the internal electromagnetic coil is greater than or equal to the predetermined threshold, maintain the current working state of the external electromagnetic coil; when it is determined that the output voltage of the internal electromagnetic coil is less than the predetermined threshold, mark the currently working external electromagnetic coil, and start traversing the external electromagnetic coils from the currently working external electromagnetic coil, thereby updating the working states of multiple external electromagnetic coils.

[0015] Preferably, the extracorporeal control device is further configured to: operate each extracorporeal electromagnetic coil except the currently operating extracorporeal electromagnetic coil in a predetermined order; receive the output voltage of the internal electromagnetic coil from the internal control device; and update a first mapping table of the correspondence between the power output of each extracorporeal electromagnetic coil and the output voltage of the internal electromagnetic coil.

[0016] Preferably, the extracorporeal control device is further configured to: operate the extracorporeal electromagnetic coils in groups of two or more in a predetermined order; receive the output voltage of the intracorporeal electromagnetic coils from the intracorporeal control device; and update a second mapping table of the correspondence between the output power of the extracorporeal electromagnetic coils in groups of two or more and the output voltage of the intracorporeal electromagnetic coils.

[0017] Preferably, the extracorporeal wireless communication device and the intracorporeal wireless communication module respectively include a Bluetooth module or an NFC communication module; the extracorporeal electromagnetic coil and the intracorporeal electromagnetic coil respectively include a planar spiral coil; a plurality of extracorporeal electromagnetic coils are arranged outside the patient's body and are encapsulated with colloid to fit the human skin.

[0018] According to an embodiment of the present invention, a control method for a multi-coil electromagnetic induction energy transmission system is provided, which includes: initializing the system by an extracorporeal control device; acquiring the working status of multiple extracorporeal electromagnetic coils by the extracorporeal control device; detecting the movement status of a patient by the extracorporeal control device; and operating one or more of the multiple extracorporeal electromagnetic coils by the extracorporeal control device according to the movement status of the patient and the working status of the multiple extracorporeal electromagnetic coils.

[0019] Preferably, when initializing the system, the extracorporeal control device operates each extracorporeal electromagnetic coil in a predetermined order; the extracorporeal control device receives the output voltage of the internal electromagnetic coil from the internal control device; the extracorporeal control device stores the output power of each extracorporeal electromagnetic coil and the output voltage of the internal electromagnetic coil, thereby constructing a first mapping table of the corresponding relationship between the output power of each extracorporeal electromagnetic coil and the output voltage of the internal electromagnetic coil.

[0020] Preferably, when initializing the system, the extracorporeal control device makes the extracorporeal electromagnetic coils work in groups of two or more according to a predetermined order; the extracorporeal control device receives the output voltage of the internal electromagnetic coils from the internal control device; and the extracorporeal control device stores and constructs a second mapping table of the correspondence between the output power of the external electromagnetic coils in groups of two or more and the output voltage of the internal electromagnetic coils.

[0021] Preferably, when it is determined that the patient is in a static state, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil according to the first mapping table; when it is determined that the patient is in a moving state, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil and one or more adjacent external electromagnetic coils according to the first mapping table.

[0022] Preferably, when it is determined that the patient is in a static state, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil according to the first mapping table; when it is determined that the patient is in a moving state, the external control device operates two or more external electromagnetic coils corresponding to the maximum output voltage of the internal electromagnetic coil according to the second mapping table.

[0023] Preferably, the control method of the multi-coil electromagnetic induction energy transmission system further includes: obtaining acceleration data from an accelerometer and data from a gyroscope by an external control device; when no data from the gyroscope is detected and the acceleration data detected from the accelerometer only includes gravity acceleration data, the external control device determines that the patient is in a static state; when changes are detected in the data from the gyroscope and / or in the acceleration data from the accelerometer, the external control device determines that the patient is in motion.

[0024] Preferably, the control method of the multi-coil electromagnetic induction energy transmission system may further include: when it is determined that the patient is in a state of motion, determining whether the output voltage of the internal electromagnetic coil is greater than or equal to a predetermined threshold; when it is determined that the output voltage of the internal electromagnetic coil is greater than or equal to the predetermined threshold, maintaining the current working state of the external electromagnetic coil; when it is determined that the output voltage of the internal electromagnetic coil is less than the predetermined threshold, marking the currently working external electromagnetic coil, and traversing the external electromagnetic coils starting from the currently working external electromagnetic coil, thereby updating the working states of multiple external electromagnetic coils.

[0025] Preferably, the traversal operation of the extracorporeal electromagnetic coils starting from the currently working extracorporeal electromagnetic coil includes: operating each extracorporeal electromagnetic coil except the currently working extracorporeal electromagnetic coil in a predetermined order; receiving the output voltage of the intracorporeal electromagnetic coil from the intracorporeal control device; and updating the first mapping table of the correspondence between the power output of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil.

[0026] Preferably, the traversal operation of the extracorporeal electromagnetic coils starting from the currently working extracorporeal electromagnetic coil includes: making the extracorporeal electromagnetic coils work in groups of two or more according to a predetermined order; receiving the output voltage of the intracorporeal electromagnetic coils from an intracorporeal control device; and updating a second mapping table of the correspondence between the output power of the extracorporeal electromagnetic coils in groups of two or more and the output voltage of the intracorporeal electromagnetic coils.

[0027] The present invention adopts the above technical solution, which has the following beneficial effects:

[0028] (1) The multi-coil electromagnetic induction energy transmission system uses multiple extracorporeal electromagnetic coils arranged in a single row or multiple rows in the extracorporeal part, which can dynamically adjust the energy transmission between different coils and reduce the problems of coupling coefficient decrease and EMI electromagnetic leakage.

[0029] (2) The multi-coil electromagnetic induction energy transmission system uses a single coil in the in vivo part to adapt to the volume limitation of the implant. At the same time, it switches multiple external electromagnetic coils in the external part to adapt to the position changes between the external electromagnetic coil and the internal electromagnetic coil, thereby increasing the movement range, reducing the weak coupling phenomenon caused by position offset, and maintaining effective energy transmission.

[0030] (3) The in vivo control device of the multi-coil electromagnetic induction energy transmission system can monitor the output voltage of the in vivo electromagnetic coil and send it to the in vitro control device through wireless communication, so that the in vitro control device can ensure efficient energy transmission by controlling the connection and disconnection of one or more of the multiple in vitro electromagnetic coils.

[0031] To sum up, the present invention, by introducing multi-coil design and switch control, can better adapt to the energy transmission requirements when the position of the electromagnetic coil in the body changes, effectively solve the problems of size limitation, low efficiency, limited movement range and EMI electromagnetic leakage in the single-coil system, and provide a more flexible, efficient and safe solution for wireless energy transmission inside and outside the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The exemplary embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings. For the sake of clarity, the same components in different drawings are shown with the same reference numerals. It should be noted that the drawings are only for illustration and are not necessarily drawn to scale. In these drawings:

[0033] Figure 1 1 is a block diagram showing a multi-coil electromagnetic induction energy transfer system according to an embodiment of the present invention.

[0034] Figure 2 1 is a flow chart showing a control method of a multi-coil electromagnetic induction power transmission system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The implementation scheme of the present invention is described in detail below. This implementation scheme is implemented on the premise of the technical scheme of the present invention, and a detailed implementation method and specific operation process are given, but the protection scope of the present invention is not limited to the implementation scheme described below.

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 1 is a block diagram showing a multi-coil electromagnetic induction energy transfer system according to an embodiment of the present invention.

[0037] The multi-coil electromagnetic induction energy transmission system according to the embodiment of the present invention may include an external part and an internal part. Each part is equipped with a specific device to achieve efficient wireless energy transmission. The following is a detailed description of the various components of the multi-coil electromagnetic induction energy transmission system.

[0038] The external part may include: an external control device 101, an external wireless communication device 102, a switch device 103, an external electromagnetic coil 104, and a radio frequency transceiver 105. One or more of the external control device 101, the external wireless communication device 102, the switch device 103, the external electromagnetic coil 104, and the radio frequency transceiver 105 may be separately provided or integrated into one.

[0039] The in vitro control device 101 may include a processor or microprocessor (MCU), etc., which is responsible for the control logic and data processing of the in vitro part. Optionally, the in vitro control device 101 may also include a memory. The operation / function of the in vivo control device 101 can be implemented as a computer-readable code / algorithm / software stored on its memory, and the memory may include a non-volatile computer-readable recording medium. A non-volatile computer-readable recording medium is any data storage device that can store data read by a processor or microprocessor. Examples of computer-readable recording media include hard disk drives (HDDs), solid-state drives (SSDs), silicon disk drives (SDDs), read-only memories (ROMs), random access memories (RAMs), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, etc. The processor or microprocessor can perform the operation / function of the in vitro control device 101 by executing computer-readable code / algorithms / software stored on non-volatile computer-readable recording media.

[0040] The extracorporeal wireless communication device 102 may include a Bluetooth module, an NFC communication module, etc., but the present invention is not limited thereto. The extracorporeal wireless communication device 102 may flexibly select other suitable wireless communication technologies, such as Wi-Fi, Zigbee, etc., according to specific application requirements and scene characteristics. The extracorporeal wireless communication device 102 is used to wirelessly communicate with the internal body to exchange control information and status data, etc.

[0041] According to the embodiment of the present invention, the extracorporeal wireless communication device 102 may be electrically connected to the extracorporeal control device 101 , and the extracorporeal wireless communication device 102 may be separately provided with the extracorporeal control device 101 or integrated into one.

[0042] According to the requirements of the movement range of the in vivo electromagnetic coil, the multiple in vitro electromagnetic coils may include m electromagnetic coils (m is an integer greater than 1, preferably m is 2 or 3), and the multiple in vitro electromagnetic coils may be arranged in a single column, or may be arranged side by side in n columns (n ​​is an integer greater than 1, preferably n is 2 or 3). This design can improve the efficiency and stability of energy transmission, and can also meet the energy transmission requirements in different scenarios. For example, in a scenario where a large range of energy transmission is required, multiple in vitro electromagnetic coils can be placed side by side to increase the range of energy transmission.

[0043] The external electromagnetic coil is arranged outside the patient's body and carried by the patient to provide necessary electrical energy to the electrical stimulator or other components in the body. The design of the external electromagnetic coil needs to take into account portability and ease of use, while ensuring sufficient energy transmission efficiency. Multiple external electromagnetic coils can be packaged using colloids to better fit the human skin, but the present invention is not limited to this packaging method.

[0044] The switch device 103 can be set to one or more, and electrically connected to one or more of the multiple external electromagnetic coils 104. The external control device 101 can be electrically connected to the switch device 103 to control the connection and disconnection of one or more of the multiple external electromagnetic coils through the switch device 103, so as to adapt to the position and power requirements of different internal electromagnetic coils. According to an embodiment of the present invention, the switch device 103 and the external electromagnetic coil 104 are set one-to-one, that is, the number of the switch device 103 is the same as the number of the external electromagnetic coil 104.

[0045] The multi-coil electromagnetic induction energy transmission system may further include a radio frequency transceiver 105, which may be electrically connected to the external control device 101 and the switch device 103, that is, the radio frequency transceiver 105 is connected between the external control device 101 and the switch device 103. The radio frequency transceiver 105 may transmit energy to the external electromagnetic coil by transmitting electromagnetic wave signals of a specific frequency, which are modulated and amplified high-frequency alternating current signals, and the frequency range is usually between 300kHz and 30GHz.

[0046] Accordingly, the in-vivo part may include: an in-vivo control device 201, an in-vivo wireless communication device 202, and an in-vivo electromagnetic coil 203. Due to the volume limitation of the in-vivo part, the in-vivo part of the multi-coil electromagnetic induction energy transmission system according to the embodiment of the present invention uses only one electromagnetic coil, and efficient energy transmission is achieved through the multi-coil design and dynamic adjustment of the in-vivo part.

[0047] The in-vivo control device 201 may include a processor or microprocessor (MCU), etc., which is responsible for the control logic and data processing of the in-vivo part. Optionally, the in-vivo control device 201 may also include a memory. The above-mentioned operations / functions of the in-vivo control device 201 can be implemented as computer-readable code / algorithm / software stored on its memory, and the memory may include a non-volatile computer-readable recording medium. A non-volatile computer-readable recording medium is any data storage device that can store data read by a processor or microprocessor. Examples of computer-readable recording media include hard disk drives (HDDs), solid-state drives (SSDs), silicon disk drives (SDDs), read-only memories (ROMs), random access memories (RAMs), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, etc. The processor or microprocessor can perform the above-mentioned operations / functions of the in-vivo control device 201 by executing computer-readable code / algorithms / software stored on non-volatile computer-readable recording media.

[0048] The in-vivo wireless communication device 202 may include a Bluetooth module, an NFC communication module, etc., and the present invention is not limited thereto. The in-vivo wireless communication device 202 may flexibly select the most appropriate wireless communication technology, such as Wi-Fi, Zigbee, etc., according to specific application requirements and scene characteristics, as long as it can wirelessly communicate with the in-vivo wireless communication device 102. The in-vivo wireless communication device 202 is used to wirelessly communicate with the in-vivo wireless communication device 102 to exchange control information and status data, etc.

[0049] According to the embodiment of the present invention, the in-vivo wireless communication device 202 may be electrically connected to the in-vivo control device 201 , and the in-vivo wireless communication device 202 may be separately provided with the in-vivo control device 201 or integrated into one.

[0050] The in-vivo electromagnetic coil can be implanted in the patient's body, usually at a shallow position under the skin. The in-vivo electromagnetic coil has the characteristics of biocompatibility, miniaturization, high efficiency and durability. The in-vivo electromagnetic coil works in conjunction with the in-vivo electromagnetic coil to receive energy and data signals from the in-vivo electromagnetic coil and transmit them to the implantable neurostimulator and the in-vivo control device. According to an embodiment of the present invention, the in-vivo electromagnetic coil can receive the alternating current of the in-vivo coil by electromagnetic coupling with the in-vivo electromagnetic coil, and convert the received alternating current into direct current through rectification, filtering and other operations (for example, full-bridge rectification, etc.).

[0051] The in vitro electromagnetic coil and the in vivo electromagnetic coil can utilize a planar spiral coil, a micro coil, a Helmholtz coil, etc. According to an embodiment of the present invention, the in vitro electromagnetic coil and the in vivo electromagnetic coil may include a planar spiral coil. In practical applications, the in vitro electromagnetic coil and the in vivo electromagnetic coil are usually used in pairs to ensure the best coupling effect and energy transmission efficiency. Their designs need to match each other so as to achieve effective wireless communication and energy transmission while maintaining a certain distance.

[0052] According to an embodiment of the present invention, the size of each external electromagnetic coil is substantially equal to the size of the internal electromagnetic coil, thereby ensuring lossless energy transmission. At the same time, due to the magnetic induction energy transmission, the transmission adaptation size does not have to correspond to the wavelength corresponding to the transmission frequency band, further reducing the size. The shape of each external electromagnetic coil and internal electromagnetic coil is designed to be circular or square, and the winding method adopts double-layer or more layers of winding to reduce the number of windings on a single plane, thereby achieving the effect of reducing the space area.

[0053] According to the above structural arrangement, the working process of the multi-coil electromagnetic induction energy transmission system according to the embodiment of the present invention may include two stages: the initialization stage of the system and the use stage of the system.

[0054] In the initialization stage of the system, the multi-coil electromagnetic induction energy transmission system first numbers all the in vitro electromagnetic coils. For example, they can be numbered 1, 2, ..., m in sequence, where m is the number of in vitro electromagnetic coils. The number of each in vitro electromagnetic coil will be used for subsequent control and recording.

[0055] According to specific application requirements, a starting electromagnetic coil can be set. For example, an extracorporeal electromagnetic coil numbered 1 can be selected as the starting electromagnetic coil. This setting can be implemented through a patient interface of the system (e.g., a display interface) or a preset configuration file.

[0056] Then, the multi-coil electromagnetic induction energy transmission system can make each extracorporeal electromagnetic coil work in a predetermined sequence, and the predetermined sequence may include the physical position sequence, output power sequence, etc. of each extracorporeal electromagnetic coil.

[0057] According to the embodiment of the present invention, each external electromagnetic coil can be operated in sequence from top to bottom and from left to right according to the physical position of each external electromagnetic coil. For example, if the external electromagnetic coils are arranged vertically in 1 column, they can be activated in sequence from top to bottom 1→2→...m.

[0058] According to another embodiment of the present invention, the input power of each external electromagnetic coil is the same, and their output power may be different due to the coil position and matching consistency. The input power refers to the energy transmitted to the external electromagnetic coil by the radio frequency transceiver. According to the output power of each coil, the coil with higher output power can be preferentially selected for operation. According to the pre-measured output power data, the best external electromagnetic coil can be automatically selected.

[0059] According to another embodiment of the present invention, other coil working sequences may also be set according to actual needs, such as random sequence, alternating sequence, etc., to meet different application scenarios and optimization requirements.

[0060] At the same time, during the activation of multiple extracorporeal electromagnetic coils, the extracorporeal control device can receive the voltage feedback signal of the internal electromagnetic coil, record (store) the power output of the external part and the voltage output of the internal part, establish a mapping table, and select the working coil number corresponding to the highest voltage.

[0061] During the use of the system, if the misalignment of the electromagnetic coils inside and outside the body occurs, the multi-coil electromagnetic induction energy transmission system can use the number of the electromagnetic coil outside the body before the misalignment occurs as the new starting point and re-execute the traversal process. In addition, the in-body part of the multi-coil electromagnetic induction energy transmission system can monitor the rectified output voltage value of the electromagnetic coil inside the body and use it as a feedback signal to evaluate the effect of the current energy transmission. By analyzing these data, the in-body control device can adjust the working state of the electromagnetic coil outside the body and select the electromagnetic coil outside the body that can make the electromagnetic coil inside the body output the highest voltage for energy transmission under the current conditions, thereby achieving dynamic optimization of energy transmission.

[0062] In order to improve the accuracy and reliability of the system, during the initialization or periodic calibration of the system, the multi-coil electromagnetic induction energy transmission system according to the implementation scheme of the present invention can measure and record the correspondence between the output power of different extracorporeal electromagnetic coils under different working conditions and the rectified output voltage of the internal electromagnetic coil, thereby forming a mapping table, and the table is stored in the non-volatile memory of the external part as a reference for the selection of external electromagnetic coils in subsequent energy transmission.

[0063] During the use phase of the system, when it is determined that the patient is in motion (for example, changing from a static state to a motion state or in a moving state), the multi-coil electromagnetic induction energy transmission system can automatically activate two or more external electromagnetic coils. This multi-coil synchronous working mode helps to maintain the continuity and stability of energy transmission, ensuring that a high energy transmission efficiency can be maintained even in a motion state. When it is determined that the patient is in a static state (resting state, for example, sitting or lying down), the multi-coil electromagnetic induction energy transmission system can switch to a single-coil working state, activating only one external electromagnetic coil, so that the energy is concentrated on a single coil to reduce unnecessary energy dispersion and improve the efficiency of energy transmission.

[0064] According to an embodiment of the present invention, the external part of the multi-coil electromagnetic induction energy transmission system may include an accelerometer and a gyroscope, and the accelerometer and the gyroscope may be electrically connected to the external control device, respectively. The accelerometer is used to detect the acceleration change rate of the object, so as to determine whether the patient is moving or walking; the gyroscope is used to detect the angle of the posture of the object, so as to determine whether the patient is standing, sitting or lying down.

[0065] When the patient is at rest, the gyroscope does not detect any movement and its output is zero. At the same time, the accelerometer only detects the acceleration of gravity. When the patient starts to move, the gyroscope can detect this change and generate corresponding data. If the patient suddenly starts to move from a resting state, the acceleration data detected by the accelerometer will also change to reflect this sudden movement. If the patient moves at a constant speed, the acceleration data detected by the accelerometer will remain unchanged because there is no change in speed, so there is no additional acceleration or deceleration.

[0066] According to the implementation scheme of the present invention, the extracorporeal control device of the multi-coil electromagnetic induction energy transmission system can be further configured to: obtain acceleration data from an accelerometer and data from a gyroscope; when no data from the gyroscope is detected and the acceleration data detected from the accelerometer only includes gravity acceleration data, it is determined that the patient is in a stationary state; when a change in the data from the gyroscope and / or the acceleration data from the accelerometer is detected, it is determined that the patient is in motion.

[0067] It should be noted that the motion state and static state here are relative. Since each person's physical condition and exercise habits are different, the algorithm can be adjusted for different patients to improve the accuracy and reliability of recognition.

[0068] The multi-coil electromagnetic induction energy transmission system of the present invention can dynamically adjust the working state of the external electromagnetic coil according to the patient's motion state, thereby effectively improving the energy transmission efficiency. The traditional electrical stimulation system needs to use a complex load algorithm to restore the patient's motion trajectory in order to achieve precise electrical stimulation control. However, the detection of the patient's motion state by the present invention does not need to restore the patient's motion trajectory through a load algorithm. It only needs to adjust the working state of the external electromagnetic coil when the motion state changes to achieve precise control of electrical stimulation, thus simplifying the complexity of the software algorithm. This design not only improves the response speed of the system, but also reduces the difficulty of software development and maintenance costs.

[0069] In the multi-coil electromagnetic induction energy transmission system according to the implementation scheme of the present invention, electromagnetic coils are respectively arranged at the transmitting end (external part) and the receiving end (internal part), and the alternating magnetic field is used to generate an induced electromotive force between the coils to realize non-contact transmission of energy. The system can automatically adjust the working state of the external electromagnetic coil according to the different motion states of the patient to optimize the energy transmission efficiency and stability. In addition, the external control device communicates with the internal control device through the external wireless communication device to monitor the energy transmission parameters. According to the power demand and position change of the internal part, the external control device can dynamically adjust the working state of multiple external electromagnetic coils through the switching device to maintain the best energy transmission efficiency. The output voltage and other key information of the internal electromagnetic coil monitored by the internal control device are fed back to the external control device through the internal wireless communication device to form a closed-loop control system, thereby continuously optimizing the energy transmission process.

[0070] Refer to the following Figure 2 A flowchart of a method for controlling an extracorporeal control device in a multi-coil electromagnetic induction energy transmission system according to an embodiment of the present invention is described.

[0071] In step S21, the extracorporeal control device initializes the system and first numbers all the extracorporeal electromagnetic coils, for example, setting them to 1, 2, ..., m according to the physical position from top to bottom, where m is the number of extracorporeal electromagnetic coils, so that each extracorporeal electromagnetic coil is operated in the order of physical position from top to bottom (1→2→...m).

[0072] During the activation process of each extracorporeal electromagnetic coil, the extracorporeal control device can receive the output voltage of the intracorporeal electromagnetic coil from the intracorporeal control device through wireless communication between the extracorporeal communication device and the intracorporeal communication device, store the output power of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil, and thus construct a first mapping table of the corresponding relationship between the output power of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil.

[0073] Alternatively, the extracorporeal control device can also make the extracorporeal electromagnetic coils operate in groups of two or more in a predetermined order, such as (1, 2), (3, 4)..., (m-1, m) or (1, 2, 3), (4, 5, 6)..., (m-2, m-1, m), etc., respectively receive the output voltage of the intracorporeal electromagnetic coil from the intracorporeal control device, store and construct a second mapping table of the corresponding relationship between the output power of the extracorporeal electromagnetic coils in groups of two or more and the output voltage of the intracorporeal electromagnetic coil.

[0074] In step S22, the in vitro control device can obtain the working status of multiple in vitro electromagnetic coils according to the constructed mapping table. According to an embodiment of the present invention, the in vitro control device can determine an in vitro electromagnetic coil corresponding to the maximum output voltage of the in vivo electromagnetic coil and one or more adjacent in vitro electromagnetic coils according to the constructed first mapping table.

[0075] Alternatively, the external control device determines an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil according to the constructed first mapping table, and determines two or more external electromagnetic coils corresponding to the maximum output voltage of the internal electromagnetic coil according to the constructed second mapping table. The selection of the external electromagnetic coil for the multi-coil electromagnetic induction energy transmission system according to the present invention is not limited to the above method.

[0076] In step S23, during the use phase of the system, the external control device collects data from the accelerometer and the gyroscope to detect the patient's motion state.

[0077] According to an embodiment of the present invention, the extracorporeal control device obtains acceleration data from an accelerometer and data from a gyroscope; when no data from the gyroscope is detected and the acceleration data from the accelerometer is detected to include only gravity acceleration data, it is determined that the patient is in a stationary state; when a change in the data from the gyroscope and / or a change in the acceleration data from the accelerometer is detected, it is determined that the patient is in a moving state.

[0078] When it is determined that the patient is in a static state, in step S25, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil is operated according to the first mapping table, so that energy is concentrated on a single coil to reduce unnecessary energy dispersion and improve the efficiency of energy transmission.

[0079] In addition, when it is determined that the patient is in a static state, the external control device is further configured to: maintain the current working state of the external electromagnetic coil, and regularly (for example, every 5 minutes, 10 minutes, etc.) receive the output voltage of the internal electromagnetic coil from the internal control device to determine whether the system link is normal. This regular check helps ensure the reliability and stability of the system. By monitoring the output voltage of the internal electromagnetic coil, it can help identify potential problems, such as sensor failure, signal interference, or power supply problems. These problems may cause the system to not work properly, so timely detection and resolution of these problems is crucial to ensuring patient safety and treatment effectiveness.

[0080] When it is determined that the patient is in motion, in step S24, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil and one or more external electromagnetic coils adjacent thereto according to the constructed first mapping table. Alternatively, the external control device operates two or more external electromagnetic coils corresponding to the maximum output voltage of the internal electromagnetic coil according to the constructed second mapping table. This multi-coil synchronous operation mode helps to maintain the continuity and stability of energy transmission, ensuring that a high energy transmission efficiency can be maintained even during movement.

[0081] Under normal circumstances, the coordinated work of two extracorporeal electromagnetic coils is sufficient to meet the basic needs of the system. However, the present invention is not limited to this configuration, and it allows three or more extracorporeal electromagnetic coils to operate simultaneously to enhance the performance and stability of the system. The extracorporeal control device can further use data from the accelerometer and the gyroscope to determine the patient's vibration amplitude. If it is detected that the patient's vibration amplitude exceeds a predetermined threshold (the threshold can be set according to the actual measurement situation), the system can automatically adjust so that three or more extracorporeal electromagnetic coils work simultaneously. This dynamic adjustment can adapt to different vibration scenarios and ensure the stability and efficiency of the system. Using more extracorporeal electromagnetic coils means that a larger energy transfer area can be covered, which helps to improve the efficiency and reliability of energy transmission. In the case of more intense patient activities or large vibrations, increasing the number of coils can reduce energy loss and maintain stable operation of the system. The present invention optimizes system performance according to the actual movement state of the patient by flexibly adjusting the number of extracorporeal electromagnetic coils, thereby improving the stability and adaptability of the entire system.

[0082] When it is determined that the patient is in motion, the external control device can communicate wirelessly with the internal control device, and the external control device can collect the output voltage from the internal electromagnetic coil, and determine in step S26 whether the output voltage of the internal electromagnetic coil is greater than or equal to a predetermined threshold. According to an embodiment of the present invention, the predetermined threshold is the minimum voltage value required to maintain the stable operation of the internal stimulator. This predetermined threshold is calibrated and written before the system leaves the factory, that is, the voltage value that maintains this state is measured for different output frequency pulse widths (i.e., amplitudes) of the stimulator.

[0083] When it is determined that the output voltage of the in-vivo electromagnetic coil is greater than or equal to the predetermined threshold, the current working state of the in-vivo electromagnetic coil is maintained, ie, the process returns to step S23.

[0084] When it is determined that the output voltage of the internal electromagnetic coil is less than the predetermined threshold, in step S27, the currently working external electromagnetic coil is marked, and the external electromagnetic coils are traversed starting from the currently working external electromagnetic coil, thereby updating the working states of multiple external electromagnetic coils.

[0085] According to an embodiment of the present invention, similar to the initialization operation of the system, the traversal operation of the extracorporeal electromagnetic coils starting from the currently working extracorporeal electromagnetic coil may include: operating each extracorporeal electromagnetic coil except the currently working extracorporeal electromagnetic coil in a predetermined order; receiving the output voltage of the intracorporeal electromagnetic coil from the intracorporeal control device; and updating the first mapping table of the correspondence between the power output of each extracorporeal electromagnetic coil and the output voltage of the intracorporeal electromagnetic coil.

[0086] Alternatively, the traversal operation of the extracorporeal electromagnetic coils starting from the currently working extracorporeal electromagnetic coil may further include: making the extracorporeal electromagnetic coils work in groups of two or more in a predetermined order; receiving the output voltage of the intracorporeal electromagnetic coils from an intracorporeal control device; and updating a second mapping table of the correspondence between the output power of the extracorporeal electromagnetic coils in a group of two or more and the output voltage of the intracorporeal electromagnetic coils.

[0087] The multi-coil electromagnetic induction energy transmission system according to the present invention performs traversal operation on the external electromagnetic coil in a manner not limited to the above. Subsequently, the multi-coil electromagnetic induction energy transmission system according to the present invention operates the external electromagnetic coil according to the updated first mapping table and / or second mapping table.

[0088] In summary, the multi-coil electromagnetic induction energy transmission system and its control method of the present invention can achieve high flexibility, efficiency and reliability of wireless energy transmission through dynamic adjustment mechanism, intelligent optimization strategy and precise calibration process, providing a new energy solution for various portable medical devices, wearable electronic devices, etc.

[0089] The various embodiments of the invention are not an exhaustive list of all possible combinations, but are intended to describe representative aspects of the invention, and what is described in various embodiments may be applied independently or in combinations of two or more.

[0090] The description presented in the above exemplary embodiments is only used to illustrate the technical solution of the present invention, and is not intended to be exhaustive, nor is it intended to limit the present invention to the precise form described. Obviously, it is possible for a person of ordinary skill in the art to make many changes and variations based on the above teachings. The exemplary embodiments are selected and described to explain the specific principles of the present invention and its practical application, so that other technicians in the field can easily understand, implement and use the various exemplary embodiments of the present invention and its various selected forms and modified forms. The scope of protection of the present invention is intended to be limited by the attached claims and their equivalent forms.

Claims

1. A multi-coil electromagnetic induction energy transmission system, comprising: a plurality of in vitro electromagnetic coils, the plurality of in vitro electromagnetic coils being arranged in one or more rows, a plurality of switch devices, the plurality of switch devices being configured to be electrically connected one-to-one with the plurality of external electromagnetic coils, A radio frequency transceiver device, which is electrically connected to the plurality of switch devices and is configured to transmit a high frequency alternating current signal to the plurality of in vitro electromagnetic coils; an external control device configured to be electrically connected to the plurality of switch devices and the radio frequency transceiver device respectively; an extracorporeal communication device configured to be electrically connected to an extracorporeal control device; an in-vivo electromagnetic coil configured to be electromagnetically coupled with a plurality of in-vivo electromagnetic coils and capable of outputting a direct current signal; an in-vivo communication device configured to communicate wirelessly with an in-vivo communication device; an in-vivo control device, which is configured to be electrically connected to the in-vivo electromagnetic coil and the in-vivo communication device respectively, and is configured to obtain an output voltage of the in-vivo electromagnetic coil, and send the obtained output voltage of the in-vivo electromagnetic coil to the in-vivo control device through the in-vivo communication device; Wherein, the external control device is configured as follows: Initialize the system; Obtaining the working status of multiple in vitro electromagnetic coils; Detect the patient's movement status; According to the patient's movement state and the working states of the multiple external electromagnetic coils, one or more of the multiple external electromagnetic coils are put into operation.

2. The multi-coil electromagnetic induction energy transmission system according to claim 1, wherein: The external control device is further configured to: when initializing the system, operating each external electromagnetic coil in a predetermined order; receiving an output voltage of an in-body electromagnetic coil from an in-body control device; The output power of each external electromagnetic coil and the output voltage of the internal electromagnetic coil are stored, so as to construct a first mapping table of the corresponding relationship between the output power of each external electromagnetic coil and the output voltage of the internal electromagnetic coil.

3. The multi-coil electromagnetic induction energy transmission system according to claim 2, wherein: The external control device is further configured to: when initializing the system, operating the external electromagnetic coils in groups of two or more according to a predetermined sequence; receiving an output voltage of an in-body electromagnetic coil from an in-body control device; A second mapping table of the correspondence between the output power of the external electromagnetic coil and the output voltage of the internal electromagnetic coil in a group of two or more is stored and constructed.

4. The multi-coil electromagnetic induction energy transmission system according to claim 2, wherein: The extracorporeal control device is further configured as: When it is determined that the patient is in a static state, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil is operated according to the first mapping table; When it is determined that the patient is in motion, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil and one or more adjacent external electromagnetic coils are operated according to the first mapping table.

5. The multi-coil electromagnetic induction energy transmission system according to claim 3, wherein: The extracorporeal control device is further configured as: When it is determined that the patient is in a static state, an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil is operated according to the first mapping table; When it is determined that the patient is in motion, two or more external electromagnetic coils corresponding to the maximum output voltage of the internal electromagnetic coil are operated according to the second mapping table.

6. The multi-coil electromagnetic induction energy transfer system according to claim 4 or 5, comprising an accelerometer and a gyroscope; The accelerometer and the gyroscope are electrically connected to an external control device respectively; The extracorporeal control device is further configured as: Get acceleration data from the accelerometer and data from the gyroscope; When no data from the gyroscope is detected and it is detected that the acceleration data from the accelerometer includes only gravity acceleration data, determining that the patient is in a stationary state; When a change in the data from the gyroscope and / or a change in the acceleration data from the accelerometer is detected, it is determined that the patient is in motion.

7. The multi-coil electromagnetic induction energy transmission system according to claim 4 or 5, wherein: The external control device is further configured to: when it is determined that the patient is in motion, determining whether the output voltage of the in-vivo electromagnetic coil is greater than or equal to a predetermined threshold; When it is determined that the output voltage of the in-vivo electromagnetic coil is greater than or equal to a predetermined threshold, maintaining the current working state of the in-vivo electromagnetic coil; When it is determined that the output voltage of the internal electromagnetic coil is less than a predetermined threshold, the currently working external electromagnetic coil is marked, and the external electromagnetic coils are traversed starting from the currently working external electromagnetic coil, thereby updating the working states of multiple external electromagnetic coils.

8. The multi-coil electromagnetic induction energy transmission system according to claim 7, wherein: The extracorporeal control device is further configured as: activating each of the external electromagnetic coils except for the currently activating external electromagnetic coil in a predetermined order; receiving an output voltage of an in-vivo electromagnetic coil from an in-vivo control device; A first mapping table of the correspondence between the power output by each external electromagnetic coil and the output voltage of the internal electromagnetic coil is updated.

9. The multi-coil electromagnetic induction energy transmission system according to claim 8, wherein: The extracorporeal control device is further configured as: operating the external electromagnetic coils in groups of two or more according to a predetermined sequence; receiving an output voltage of an in-vivo electromagnetic coil from an in-vivo control device; A second mapping table of correspondence between the output power of the external electromagnetic coil and the output voltage of the internal electromagnetic coil in a group of two or more is updated.

10. The multi-coil electromagnetic induction energy transmission system according to claim 1, wherein: The external wireless communication device and the internal wireless communication module include a Bluetooth module or an NFC communication module respectively; The external electromagnetic coil and the internal electromagnetic coil respectively include planar spiral coils; A plurality of in vitro electromagnetic coils are arranged outside the patient's body and are encapsulated with colloid so as to fit the human skin.

11. A control method for a multi-coil electromagnetic induction energy transmission system, comprising: The system is initialized by an external control device; The working status of multiple extracorporeal electromagnetic coils is obtained by an extracorporeal control device; The patient's movement state is detected by an external control device; The external control device operates one or more of the multiple external electromagnetic coils according to the patient's movement state and the working states of the multiple external electromagnetic coils.

12. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 11, further comprising: When initializing the system, The external control device operates each external electromagnetic coil according to a predetermined sequence; The external control device receives the output voltage of the internal electromagnetic coil from the internal control device; The output power of each external electromagnetic coil and the output voltage of the internal electromagnetic coil are stored by the external control device, so as to construct a first mapping table of the corresponding relationship between the output power of each external electromagnetic coil and the output voltage of the internal electromagnetic coil.

13. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 12, further comprising: When initializing the system, The external control device causes the external electromagnetic coils to work in groups of two or more according to a predetermined sequence; The external control device receives the output voltage of the internal electromagnetic coil from the internal control device; A second mapping table of the correspondence between the output power of the external electromagnetic coil and the output voltage of the internal electromagnetic coil in a group of two or more is stored and constructed by the external control device.

14. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 12, further comprising: When it is determined that the patient is in a static state, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil according to the first mapping table; When it is determined that the patient is in motion, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil and one or more adjacent external electromagnetic coils according to the first mapping table.

15. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 13, further comprising: When it is determined that the patient is in a static state, the external control device operates an external electromagnetic coil corresponding to the maximum output voltage of the internal electromagnetic coil according to the first mapping table; When it is determined that the patient is in motion, the external control device operates two or more external electromagnetic coils corresponding to the maximum output voltage of the internal electromagnetic coil according to the second mapping table.

16. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 14 or 15, further comprising: The acceleration data from the accelerometer and the data from the gyroscope are acquired by an external control device; When no data from the gyroscope is detected and it is detected that the acceleration data from the accelerometer includes only gravity acceleration data, the external control device determines that the patient is in a static state; When the data from the gyroscope and / or the acceleration data from the accelerometer are detected to be changed, the external control device determines that the patient is in a motion state.

17. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 14 or 15, further comprising: If the patient is determined to be in motion, determining whether the output voltage of the in-vivo electromagnetic coil is greater than or equal to a predetermined threshold; When it is determined that the output voltage of the in-vivo electromagnetic coil is greater than or equal to a predetermined threshold, maintaining the current working state of the in-vivo electromagnetic coil; When it is determined that the output voltage of the internal electromagnetic coil is less than a predetermined threshold, the currently working external electromagnetic coil is marked, and the external electromagnetic coils are traversed starting from the currently working external electromagnetic coil, thereby updating the working states of multiple external electromagnetic coils.

18. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 17, wherein: The traversal operation of the external electromagnetic coil starting from the currently working external electromagnetic coil includes: activating each of the external electromagnetic coils except for the currently activating external electromagnetic coil in a predetermined order; receiving an output voltage of an in-vivo electromagnetic coil from an in-vivo control device; A first mapping table of the correspondence between the power output by each external electromagnetic coil and the output voltage of the internal electromagnetic coil is updated.

19. The control method of the multi-coil electromagnetic induction energy transmission system according to claim 18, wherein: The traversal operation of the external electromagnetic coil starting from the currently working external electromagnetic coil includes: operating the external electromagnetic coils in groups of two or more according to a predetermined sequence; receiving an output voltage of an in-vivo electromagnetic coil from an in-vivo control device; A second mapping table of correspondence between the output power of the external electromagnetic coil and the output voltage of the internal electromagnetic coil in a group of two or more is updated.

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