Wireless energy supply and data communication system for implantable medical monitoring equipment

Abstract

The invention provides a wireless energy supply and data communication system for implantable medical monitoring equipment. The system comprises a dual-battery redundancy power supply circuit, a wireless electric energy transmitting circuit, a wireless electric energy receiving circuit and a wireless data communication circuit. The double-battery redundancy power supply circuit comprises a battery electric quantity monitoring circuit and a battery power supply switching circuit. The wireless electric energy transmitting circuit comprises a wireless power transmitting circuit, a Boost circuit and a primary side resonance compensation circuit; according to the invention, by designing an in-vitro double-battery redundancy power supply mode and an electromagnetic induction type wireless power transmission mode, the risk caused by in-vivo implantation of a battery is avoided, and the convenience and safety of in-vitro battery replacement are greatly improved; the data transmission bandwidth and the data transmission anti-interference capability of the implantable medical monitoring equipment are improved by adopting a radio frequency communication frequency band conforming to the medical standard, closed-loop constant control of the in-vivo module receiving voltage is realized based on radio frequency wireless communication, and the robustness and the stability of a wireless power transmission system are improved.

Description

Technical Field

[0001] The present invention relates to biomedical electronic technology, wireless power supply technology and radio frequency communication technology, and in particular to a wireless power supply and data communication system for implantable medical monitoring equipment. Background Art

[0002] With the development of biomedical electronic technology and integrated circuits, wearable implantable medical monitoring devices have also been greatly developed. Implantable medical monitoring devices need to be able to monitor the corresponding physiological signals in the patient's body in real time for a long time, and provide timely and effective assistance to medical staff in diagnosing the patient's physical condition and treating the disease. However, implantable medical monitoring devices still face challenges in energy supply and data communication between modules inside and outside the body in clinical use.

[0003] Implantable medical monitoring devices use batteries implanted in the body, but there are problems with large battery size, limited capacity and battery life. The contactless method of wireless power supply is more in line with the power supply requirements of implantable medical devices. Wireless power supply is widely used in implantable medical monitoring devices. However, during clinical use of the implantable medical monitoring system, the relative position of the transmitting coil and the receiving coil of the wireless power transmission system may be offset, resulting in a decrease in the receiving power of the implanted module in the body, and the implanted module in the body may not be able to work normally and stably.

[0004] Data communication for implantable medical monitoring devices uses wired transmission, which has the disadvantages of being susceptible to infection and being bound by cables. Therefore, wireless data communication solutions have become the first choice for implantable medical monitoring devices. However, most solutions are based on the coupling of the transmitting coil and the receiving coil in the wireless power transmission system, and realize wireless data transmission through the modulation of the energy carrier. This solution has a limited data transmission rate and is easily affected by the outside world, resulting in a low accuracy rate of transmitted data. Summary of the invention

[0005] The purpose of the present invention is to provide a wireless power supply and data communication system for implantable medical monitoring equipment, which can be used for implantable medical monitoring equipment in a long-term, stable and safe manner, and solves the problems of poor interference capability and low transmission rate of existing wireless data communications, as well as the influence of the relative position of the coils on the receiving power of the in-vivo module in the existing wireless power supply scheme.

[0006] The object of the present invention can be achieved by the following technical solutions: A wireless power supply and data communication system for an implantable medical monitoring device, comprising a dual-battery redundant power supply circuit, a wireless power transmitting circuit, a wireless power receiving circuit, and a wireless data communication circuit;

[0007] The wireless power transmission circuit is composed of a wireless power transmission circuit, a Boost circuit and a primary resonance compensation circuit, wherein the primary resonance compensation circuit is composed of a transmitting coil and a capacitor forming a series resonance network; the boost module dynamically adjusts the output power of the wireless power transmission circuit based on a pulse width modulation signal generated by a radio frequency microcontroller; the wireless power transmission circuit is respectively connected to the primary resonance compensation circuit, the Boost circuit and the radio frequency microcontroller to provide a high-frequency AC voltage signal for the transmitting coil, and generates an induced magnetic field at the transmitting coil, and sets the frequency of the AC voltage signal of the wireless power transmission circuit through the pulse width modulation signal generated by the radio frequency microcontroller, and realizes dynamic regulation of the transmission power of the wireless power transmission circuit through the boost conversion circuit;

[0008] The wireless power receiving circuit is used to receive the induced magnetic field generated by the transmitting coil and convert it into an induced voltage signal. After rectification and voltage stabilization, a DC power supply that can be used for the normal operation of the in-vivo monitoring module is obtained. The wireless power receiving circuit is composed of a full-bridge rectifier circuit, a voltage stabilization circuit and a secondary resonance compensation circuit, wherein the secondary resonance compensation circuit is composed of a series resonance network composed of a receiving coil and a capacitor, and the resonance frequency of the secondary resonance compensation circuit is consistent with the resonance frequency of the primary resonance compensation circuit; the full-bridge rectifier circuit is connected to the secondary resonance compensation circuit and the voltage stabilization circuit to rectify the received AC voltage signal, and provide it to the voltage stabilization circuit, and output a stable DC voltage signal to provide it to the monitoring module implanted in the body;

[0009] The wireless data communication circuit is divided into a radio frequency communication circuit using radio frequency technology and a WIFI module communication circuit using WIFI technology. The radio frequency communication circuit is composed of an antenna and an impedance matching network circuit. The radio frequency communication circuit is used for data communication between an external wearable module and an internal monitoring module, and is divided into an external radio frequency communication circuit and an internal radio frequency communication circuit. The external radio frequency communication circuit uses a PCB antenna, and the internal radio frequency communication circuit uses a lead-free miniature omnidirectional ceramic antenna. The WIFI module communication circuit is used to realize data communication between the external wearable module and the mobile terminal.

[0010] The dual-battery redundancy power supply circuit provides electrical energy for the external wearable module. The dual-battery redundancy power supply circuit is divided into a battery 1 circuit and a battery 2 circuit, including a battery power monitoring circuit and a battery power switching circuit. The circuits of battery 1 and battery 2 have the same circuit structure and circuit principle and are composed of MOS tubes, triodes, resistors, and capacitors. The battery power monitoring circuit and the battery power switching circuit are respectively connected to the analog-to-digital conversion port and the general input and output port of the radio frequency microcontroller of the external wearable module to realize real-time monitoring of the external battery power and switching of the battery power circuit.

[0011] The external wearable module and the internal monitoring module respectively use a single low-power radio frequency microcontroller chip to realize wireless radio frequency communication, wireless power transmission system control, collection of internal physiological signal data, and sorting and forwarding of external signal data.

[0012] The wireless power transmitting coil and receiving coil are both designed in a planar spiral shape, the diameter of the transmitting coil is larger than the diameter of the receiving coil; the inductance value of the power transmitting coil in the wireless power transmission system is smaller than the inductance value of the receiving coil. The power of the in-body monitoring module is only obtained through the wireless power transmission system of the external wearable module, and no additional implanted in-body battery is required.

[0013] The in-vivo monitoring module sends the actual received voltage value to the external wearable module through the radio frequency communication circuit. The external wearable module compares the set received target voltage value with the actual received voltage value to obtain an error. The output power of the wireless power transmitting circuit is adjusted through the designed four modes to adjust the actual voltage value received by the in-vivo monitoring module, so as to achieve the purpose of maintaining the actual voltage value received by the in-vivo monitoring module at the set target voltage value to eliminate the error. The four modes dynamically adjust the output power of the wireless power transmitting circuit by adjusting the frequency and duty cycle of the pulse width modulation signal on the voltage feedback voltage signal line of the Boost circuit and the frequency and duty cycle of the pulse width modulation signal of the wireless power transmitter through the radio frequency microcontroller.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention proposes to use a low-power radio frequency microcontroller to design a radio frequency communication circuit to realize data transmission between the in-vivo monitoring module and the external wearable device. The data communication is guaranteed by the radio frequency communication protocol, which complies with the real-time wireless communication of the medical standard frequency band, has strong anti-interference ability and high data transmission rate, and can ensure normal operation in the daily life environment. In addition, by adding a WIFI communication module, doctors can view the physiological information in the body and the status of the operation of the monitoring device in real time on the mobile device, which greatly improves the doctor's work efficiency.

[0016] 2. The present invention proposes a dual-battery redundant power supply circuit for an external wearable device, which allows the user to view the battery power status in real time and issue an alarm when the battery power is too low. The use of an external dual-battery redundant power supply method improves the stability and safety of the power supply of the external wearable device, avoids the risks brought by implanted batteries in the body, and greatly improves the convenience of battery replacement.

[0017] 3. The present invention proposes a closed-loop constant voltage control method based on radio frequency communication, which can effectively regulate the receiving voltage of the wireless power receiving end to maintain it at the set target voltage. It avoids the sudden change of the receiving voltage caused by the relative offset of the transmitting coil and the receiving coil in the wireless power transmission system and the change of the load parameters of the in-vivo monitoring module.

[0018] 4. The present invention reduces the impact of the reduction in received power due to the relative offset between the coils of the wireless power transmission system by increasing the size difference between the transmitting coil and the receiving coil in the wireless power transmission system. The voltage gain is effectively improved by designing that the inductance value of the power transmitting coil is smaller than the inductance value of the wireless power receiving coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the overall architecture of the wireless energy supply and data communication system in the present invention;

[0021] Figure 2 It is a specific schematic diagram of the wireless energy supply and data communication system in the present invention;

[0022] Figure 3 This is a schematic diagram of the principle of the dual-battery redundant power supply circuit in the present invention;

[0023] Figure 4 This is a flowchart for realizing the double battery redundant power supply in the present invention;

[0024] Figure 5 It is a specific adjustment flow chart for realizing the constant pressure closed-loop control in the present invention;

[0025] Figure 6 This is a graphical interface diagram showing the data displayed by the host computer on the computer side of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 and Figure 2The present invention is a wireless power supply and data communication system for implantable medical monitoring equipment, which consists of an external wearable module and an internal monitoring module, including a dual-battery redundant power supply circuit, a wireless power transmission circuit, a wireless power receiving circuit, a radio frequency communication circuit, a WIFI module circuit, a signal acquisition circuit, and a radio frequency microcontroller circuit.

[0028] The external wearable module uses a low-power radio frequency microcontroller CC1310 to realize the functions of wireless data communication and wireless power supply control of the system, wherein the wireless data communication of the external wearable module consists of two parts: radio frequency communication circuit and WIFI data communication. The radio frequency communication circuit is used for data transmission between the external wearable module and the internal monitoring module, and is composed of an impedance matching circuit and a PCB antenna and combined with the CC1310 software program setting to realize the function of radio frequency communication. The working frequency band of the radio frequency communication circuit antenna is selected to meet the medical standard frequency band of 401MHz to 406MHz. The WIFI data communication circuit uses the ESP32 module to realize the data interaction between the external wearable module and mobile devices such as computers. The ESP32 module is connected to the CC1310 through the UART interface, and the data interaction between CC1310 and ESP32 is realized based on the UART protocol. The ESP32 module and the computer realize wireless data transmission through WIFI, and WIFI works in the 2.4GHz frequency band.

[0029] The in-vivo monitoring module also uses a low-power RF microcontroller CC1310 to realize the functions of system wireless data communication, wireless power supply status feedback and sensor data reception. Among them, the wireless data communication of the in-vivo monitoring module uses radio frequency technology to realize data transmission between the in-vivo monitoring module and the external wearable module. The radio frequency communication circuit is composed of an impedance matching circuit and a ceramic antenna AN1603 and is combined with the CC1310 software program setting to realize the radio frequency communication function. The CC1310 in the in-vivo monitoring module collects the rectified voltage and sends it to the CC1310 in the external wearable module through the radio frequency communication circuit. The CC1310 of the external wearable module compares and analyzes the received voltage value with the set target voltage value to adjust the wireless power transmission power, thereby achieving the purpose of constant voltage for the in-vivo monitoring module.

[0030] The wireless power transmission circuit is composed of a Boost circuit, a wireless power transmission circuit, a transmitting coil and a capacitor, wherein the Boost circuit uses a high-efficiency TPS61089 chip to realize the function of boost conversion, the wireless power transmission circuit uses a highly integrated and efficient SC5001 chip, and the radio frequency microcontroller CC1310 adjusts the output power of the Boost circuit by setting the frequency and duty cycle of PWM1 connected to the FB pin of the TPS61089 chip; CC1310 adjusts the output power of the wireless power transmitter by setting the frequency and duty cycle of PWM0 of the SC5001 chip, the output voltage of the Boost circuit is provided to the wireless power transmission circuit and together with the wireless power transmission circuit, provides dynamically adjustable output power for the wireless power transmission circuit, the transmitting coil and the capacitor are connected in series to form a primary resonance compensation circuit, and the resonant frequency of the primary resonance compensation circuit is set by adjusting the size of the capacitor.

[0031] The wireless power receiving circuit is composed of a rectifier and voltage regulator circuit, a series resistor voltage divider circuit, a receiving coil and a capacitor, wherein the rectifier circuit uses a full-bridge circuit composed of diodes to rectify the alternating induced current generated by the receiving coil, a part of the rectified current enters the voltage regulator circuit, and a stable voltage is obtained through the voltage regulator circuit and provided to the in-vivo monitoring module, and the other part enters the series resistor voltage divider circuit. CC1310 collects the rectified voltage value in proportion through the series resistor voltage divider circuit, and the receiving coil and the capacitor are connected in series to form a secondary resonance compensation circuit, and the resonant frequency of the secondary resonance compensation circuit is set to be consistent with the resonant frequency of the primary resonance compensation circuit by adjusting the size of the capacitor.

[0032] The transmitting coil and receiving coil adopt a planar spiral design. The diameter of the transmitting coil is larger than the diameter of the receiving coil to suppress the problem of a significant drop in the receiving voltage caused by the relative offset between the coils; the inductance value of the transmitting coil is smaller than the inductance value of the wireless power receiving coil to improve the voltage gain.

[0033] The hardware principle diagram of the dual battery redundant power supply circuit is as follows: Figure 3As shown, the dual-battery redundancy power supply circuit consists of a battery 1 circuit and a battery 2 circuit, which are used to supply power to the external wearable module. Since the circuits of battery 1 and battery 2 have the same circuit structure and circuit principle, only the battery 1 circuit is described here. The battery 1 circuit of the dual-battery redundancy power supply circuit consists of a battery power monitoring circuit and a battery power switching circuit, including MOS tube M1, MOS tube M2, MOS tube M3, MOS tube M4, transistor Q1, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, capacitor C1, battery power acquisition signal line BAT1_SENSE, battery power acquisition enable signal line BAT1_SENSE_SW, battery power switching circuit control line BAT1_SW, battery 1 power input line VBAT1, and battery power switching circuit output power line VBAT_SW;

[0034] The battery power acquisition enable signal line BAT1_SENSE_SW is connected to the general input and output port of CC1310 to select whether to turn on the battery power monitoring function; the battery power acquisition signal line BAT1_SENSE is connected to the analog-to-digital conversion port of CC1310 to collect the battery voltage value; the battery power switching circuit control line BAT1_SW is connected to the general input and output port of CC1310 to select whether to use battery 1 for energy supply;

[0035] The gate and source of the MOS tube M1 are connected via a resistor R2, wherein the resistor R2 provides a bias voltage for the MOS tube M1 and serves to protect the MOS tube M1 from ESD static electricity. The source of the MOS tube M1 is connected to the power input line VBAT1 of the battery 1 and the drain of the MOS tube M2. The gate of the MOS tube M1 is connected to the drain of the MOS tube M4. The drain of the MOS tube M1 is connected to BAT1_SENSE_SW and one end of the resistor R4 via the resistor R1. The other end of the resistor R4 is grounded. The resistors R1 and R4 are connected in series to form a voltage divider circuit, and the CC1310 analog-to-digital conversion port collects the battery voltage value in proportion via the voltage divider circuit.

[0036] The gate and source of the MOS tube M4 are connected via a resistor R7, wherein the resistor R7 provides a bias voltage for the MOS tube M4 and serves to protect the MOS tube M4 from ESD. The gate of the MOS tube M4 is connected to BAT1_SENSE_SW, and the source of the MOS tube M4 is grounded. When BAT1_SENSE_SW is at a high level, the MOS tube M4 is turned on, thereby turning on the MOS tube M1. At this time, BAT1_SENSE_SW can collect the battery voltage value in equal proportion;

[0037] The gate and source of the MOS tube M2 and the MOS tube M3 are connected via a resistor R3, wherein the resistor R3 provides a bias voltage for the MOS tubes M2 and M3 and serves to protect the MOS tubes M2 and M3 from ESD static electricity. The source of the MOS tube M2 is connected to the source of the MOS tube M3, the gate of the MOS tube M2 is connected to the gate of the MOS tube M3, the drain of the MOS tube M3 is connected to VBAT_SW and one end of the capacitor C1, the other end of the capacitor C1 is grounded, and the capacitor C1 filters the power output by the battery power switching circuit;

[0038] The base and emitter of the transistor Q1 are connected via a resistor R6, which ensures that the transistor Q1 is reliably cut off when there is no input voltage to BAT1_SW. The base of the transistor Q1 is connected to BAT1_SW via a resistor R5, the collector of the transistor Q1 is connected to the gate of the MOS tube M2, and the emitter of the transistor Q1 is grounded. When BAT1_SW is at a high level, the transistor Q1 is turned on, thereby turning on the MOS tubes M2 and M3, and at this time, the power supply of the battery 1 is selected.

[0039] The dual battery redundancy power supply process is as follows Figure 4 As shown, in the initial state, two batteries are installed to provide power for the RF controller CC1310. After the initialization of CC1310 is completed, the general input and output ports of CC1310 connected to BAT1_SENSE_SW and BAT2_SENSE_SW are set to output a high level, and the function of monitoring the power of battery 1 and battery 2 is turned on. CC1310 compares the collected power values ​​of battery 1 and battery 2. When the power of battery 1 is higher than the power of battery 2, the general input and output ports of CC1310 connected to BAT1_SW and BAT2_SW are set to output a high level and a low level respectively, so as to turn on the use of battery 1 and turn off the use of battery 2. The external wearable module uses the WIFI circuit to send the voltage values ​​of the two batteries collected by CC1310 to the mobile terminal and displays the voltage values ​​of the two batteries in real time. When the voltage value of the battery is lower than the set value, an alarm prompt is provided to facilitate the user to replace the battery in time.

[0040] The constant voltage closed-loop control is used to adjust the output power of the wireless power transmission circuit to maintain the stability of the power supply voltage of the in-vivo monitoring module, thereby ensuring the safe, stable and normal operation of the in-vivo monitoring module. The receiving voltage of the in-vivo monitoring module is maintained at the set target voltage through the adjustment of four modes, which are mode 1, mode 2, mode 3 and mode 4. Among them, mode 1 is to adjust the duty cycle of PWM1 in the Boost circuit by CC1310 to adjust the output power of the Boost circuit, so as to achieve the purpose of adjusting the receiving voltage of the in-vivo monitoring module, and the receiving voltage of the in-vivo monitoring module decreases with the increase of the duty cycle of PWM1; mode 2 is to increase the frequency of PWM0 in the wireless power transmission circuit by CC1310 to reduce the wireless transmission power, so as to achieve the purpose of reducing the receiving voltage of the in-vivo monitoring module, and the receiving voltage of the in-vivo monitoring module decreases with the increase of the frequency of PWM0; mode 3 is to reduce the frequency of PWM0 in the wireless power transmission circuit by CC1310 to increase the wireless transmission power, so as to achieve the purpose of increasing the receiving voltage of the in-vivo monitoring module, and the receiving voltage of the in-vivo monitoring module increases with the decrease of the frequency of PWM0; mode 4 is to adjust the duty cycle of PWM0 in the wireless power transmission circuit by CC1310 to adjust the wireless transmission power, so as to achieve the purpose of adjusting the receiving voltage of the in-vivo monitoring module, and the receiving voltage of the in-vivo monitoring module decreases with the decrease of the duty cycle of PWM0. The specific adjustment process of constant pressure closed-loop control is as follows: Figure 5 The specific adjustment steps are as follows:

[0041] (1) The CC1310 chip of the in-vivo monitoring module collects the actual rectified voltage value V R The signal is sent to the CC1310 chip of the external wearable module through the radio frequency communication circuit. The CC1310 chip of the external wearable module receives the target voltage value V set in the body. S Subtract the actual voltage value V R Get the error error. When the error is less than 0, it means that the actual voltage value is higher than the set target voltage value. When the error is greater than 0, it means that the actual voltage value is lower than the set target voltage value. If the error is equal to 0, no adjustment is required. Otherwise, enter mode 1 to adjust the receiving voltage value of the in-vivo monitoring module by adjusting the duty cycle of PWM1.

[0042] (2) In mode 1, the actual voltage value received by the in-vivo monitoring module is adjusted by adjusting the duty cycle of PWM1. If the duty cycle value of PWM1 is already at the maximum value and the error is less than 0, then enter mode 2; otherwise, determine whether the error is equal to, if the error is not equal to 0, then continue to adjust the received voltage through mode 1; otherwise, the error is equal to 0 to complete the adjustment of the received voltage; if the duty cycle value of PWM1 is already at the minimum value and the error is greater than 0, then enter mode 3; otherwise, determine whether the error is equal to, if the error is not equal to 0, then continue to adjust the received voltage through mode 1; otherwise, the error is equal to 0 to complete the adjustment of the received voltage.

[0043] (3) In mode 2, the actual voltage value received by the in-vivo monitoring module is reduced by increasing the frequency of PWM0. If the frequency of PWM0 is at the maximum value and the error is less than 0, then enter mode 4; otherwise, determine whether the error is equal to, if the error is not equal to 0, then continue to adjust the received voltage through mode 2; otherwise, the error is equal to 0 to complete the adjustment of the received voltage; if the frequency of PWM0 is at the minimum value and the error is greater than 0, then enter mode 1; otherwise, determine whether the error is equal to, if the error is not equal to 0, then continue to adjust the received voltage through mode 2; otherwise, the error is equal to 0 to complete the adjustment of the received voltage.

[0044] (4) In mode 3, the actual voltage value received by the in-vivo monitoring module is increased by reducing the frequency of PWM0. If the frequency of PWM0 is greater than the minimum value and the error is less than 0, the received voltage is adjusted through mode 3; otherwise, it is determined whether the error is equal to 0. If the error is not equal to 0, the received voltage is adjusted through mode 3; otherwise, the error is equal to 0 to complete the adjustment of the received voltage.

[0045] (5) In mode 4, the actual voltage value received by the in-vivo monitoring module is adjusted by adjusting the duty cycle of PWM0. If the duty cycle of PWM0 is at the maximum value and the error is greater than 0, then enter mode 2; otherwise, determine whether the error is equal to. If the error is not equal to 0, then continue to adjust the received voltage through mode 4; otherwise, the error is equal to 0 to complete the adjustment of the received voltage.

[0046] The WIFI module circuit is used to transmit data to and from a computer. The upper computer data display graphical interface is as follows: Figure 6As shown, six windows of real-time monitoring data are set in the interface, which are the voltage value of the wireless power transmitting circuit of the external wearable module, the current value of the wireless power transmitting circuit of the external wearable module, the temperature value of the transmitting coil of the external wearable module, the temperature value of the PCB board of the external wearable module, the temperature value of the receiving coil of the internal monitoring module, the temperature value of the PCB board of the internal monitoring module, the receiving voltage value after rectification of the internal monitoring module and the frequency of the resonance of the transmitting coil. The computer receives the voltage value and current value of the internal and external modules sent by the external wearable module through the WIFI module and displays them in real time. Through real-time monitoring, it can be judged whether the wireless power transmission system is working normally. In the present invention, data transmission can be carried out efficiently and quickly through WIFI technology and radio frequency communication technology, and finally the voltage and current values ​​of the system when working and the physiological signals collected by the internal monitoring equipment are displayed in real time on the computer host, so as to improve the efficiency of user monitoring and the flexibility of site use.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific implementation methods or replace them in similar ways. All of which are within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless power supply and data communication system for implantable medical monitoring equipment, comprising a dual-battery redundant power supply circuit, a wireless power transmitting circuit, a wireless power receiving circuit, and a wireless data communication circuit; characterized in that: The wireless power transmission circuit is composed of a wireless power transmission circuit, a Boost circuit and a primary resonance compensation circuit, and the primary resonance compensation circuit is composed of a transmitting coil and a capacitor to form a series resonance network; The boost module dynamically adjusts the output power of the wireless power transmitting circuit based on the pulse width modulation signal generated by the radio frequency microcontroller; the wireless power transmitting circuit is respectively connected to the primary resonance compensation circuit, the Boost circuit and the radio frequency microcontroller to provide a high-frequency AC voltage signal for the transmitting coil, and generates an induced magnetic field at the transmitting coil, and the frequency of the AC voltage signal of the wireless power transmitting circuit is set by the pulse width modulation signal generated by the radio frequency microcontroller, and the dynamic regulation of the transmitting power of the wireless power transmitting circuit is realized by the boost conversion circuit; The wireless power receiving circuit is used to receive the induced magnetic field generated by the transmitting coil and convert it into an induced voltage signal. After rectification and voltage stabilization, a DC power supply that can be used for the normal operation of the in-vivo monitoring module is obtained. The wireless power receiving circuit is composed of a full-bridge rectifier circuit, a voltage stabilization circuit and a secondary resonance compensation circuit, wherein the secondary resonance compensation circuit is composed of a series resonance network composed of a receiving coil and a capacitor, and the resonance frequency of the secondary resonance compensation circuit is consistent with the resonance frequency of the primary resonance compensation circuit; the full-bridge rectifier circuit is connected to the secondary resonance compensation circuit and the voltage stabilization circuit to rectify the received AC voltage signal, and provide it to the voltage stabilization circuit, and output a stable DC voltage signal to provide it to the monitoring module implanted in the body; The wireless data communication circuit is divided into a radio frequency communication circuit using radio frequency technology and a WIFI module communication circuit using WIFI technology. The radio frequency communication circuit is composed of an antenna and an impedance matching network circuit. The radio frequency communication circuit is used for data communication between an external wearable module and an internal monitoring module, and is divided into an external radio frequency communication circuit and an internal radio frequency communication circuit. The external radio frequency communication circuit uses a PCB antenna, and the internal radio frequency communication circuit uses a lead-free miniature omnidirectional ceramic antenna. The WIFI module communication circuit is used to realize data communication between the external wearable module and the mobile terminal.

2. A wireless power supply and data communication system for an implantable medical monitoring device according to claim 1, characterized in that: The dual-battery redundant power supply circuit provides power for the external wearable module. The dual-battery redundant power supply circuit is divided into battery 1 circuit and battery 2 circuit, including a battery power monitoring circuit and a battery power switching circuit. The circuits of battery 1 and battery 2 have the same circuit structure and circuit principle and are composed of MOS tubes, triodes, resistors, and capacitors. The battery power monitoring circuit and the battery power switching circuit are respectively connected to the analog-to-digital conversion port and the general input and output port of the radio frequency microcontroller of the external wearable module to realize real-time monitoring of the external battery power and switching of the battery power circuit.

3. A wireless power supply and data communication system for an implantable medical monitoring device according to claim 1, characterized in that: The external wearable module and the internal monitoring module respectively use a single low-power RF microcontroller chip to achieve wireless RF communication, wireless power transmission system control, collection of in vivo physiological signal data, and organization and forwarding of external signal data.

4. A wireless power supply and data communication system for an implantable medical monitoring device according to claim 1, characterized in that: The wireless power transmitting coil and receiving coil both adopt a planar spiral design, the diameter of the transmitting coil is larger than the diameter of the receiving coil; the inductance value of the power transmitting coil in the wireless power transmission system is smaller than the inductance value of the receiving coil.

5. A wireless power supply and data communication system for an implantable medical monitoring device according to claim 1, characterized in that: The power of the in-body monitoring module is obtained only through the wireless power transmission system of the external wearable module, and no additional implanted battery is required.

6. A wireless power supply and data communication system for an implantable medical monitoring device according to claim 1, characterized in that: The in-vivo monitoring module sends the actual received voltage value to the external wearable module through the radio frequency communication circuit. The external wearable module compares the set received target voltage value with the actual received voltage value to obtain an error. The output power of the wireless power transmitting circuit is adjusted through the designed four modes to adjust the actual voltage value received by the in-vivo monitoring module, so as to achieve the purpose of maintaining the actual voltage value received by the in-vivo monitoring module at the set target voltage value to eliminate the error. The four modes dynamically adjust the output power of the wireless power transmitting circuit by adjusting the frequency and duty cycle of the pulse width modulation signal on the voltage feedback voltage signal line of the Boost circuit and the frequency and duty cycle of the pulse width modulation signal of the wireless power transmitter through the radio frequency microcontroller.

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