Low-power charging method and device, storage medium and terminal for neural stimulator

Abstract

The present invention provides a low-power charging method and device, storage medium and terminal for a neurostimulator, wherein the method includes adjusting the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state; obtaining the working parameters of the neurostimulator to be charged, and obtaining the timing law of the alternating pulse output state and idle state of the neurostimulator to be charged based on the working parameters; according to the timing law, using an external wireless charger to charge the neurostimulator to be charged in a preset charging mode. The present invention flexibly adjusts the charging process according to the working parameters of the neurostimulator, which can significantly reduce the energy consumption of the external energy supply device and avoid energy waste.

Description

Technical Field

[0001] The present invention belongs to the technical field of neurostimulators, and relates to a low-power charging method for a neurostimulator, and in particular to a low-power charging method and device, a storage medium and a terminal for a neurostimulator. Background Art

[0002] An implantable neurostimulator is a medical device used to treat neurological diseases. It usually consists of an external power supply and a stimulator, and the stimulator consists of a pulse generator and electrodes. The pulse generator is implanted in the patient's muscle or nerve tissue through surgery and can electrically stimulate specific muscles or nerves according to the patient's condition. Since the pulse generator needs to be implanted inside the human body, its size must be as small as possible to reduce surgical risks and reduce the burden on the patient's body. To achieve this goal, existing technologies usually use wireless power supply and wireless communication to simplify the energy storage and communication modules inside the pulse generator and reduce the size of the device.

[0003] At present, the power supply of implantable neurostimulators mainly relies on external energy supply devices to transmit energy wirelessly. The external energy supply device continuously transmits wireless energy through the transmitting coil, and the neurostimulator implanted in the human body receives wireless energy through the receiving coil coupling, thereby realizing the power supply needs of the device. However, the energy consumption of the neurostimulator is not constant, but fluctuates with the output of the electrical stimulation pulse and the change of the working stage. For example, during the output of the electrical stimulation pulse, the energy consumption will increase sharply, and in the idle state, the energy consumption will decrease significantly. However, the external energy supply device continuously transmits wireless energy, and because the efficiency of wireless energy supply across human tissue is low, the external energy supply device always consumes a large amount of power, resulting in a decrease in its endurance.

[0004] In order to solve the problem of energy waste, the prior art usually integrates a battery and a battery management module that matches the battery into an implantable neurostimulator, and the external wireless power supply device only charges the battery constantly, and the charging power is a constant value, so as to avoid energy waste. For example, patent CN108448741B proposes an adaptive constant voltage high-efficiency wireless power supply system, in which the wireless power receiving end samples the voltage received by itself and feeds it back to the transmitting end through Bluetooth. The transmitting end adjusts the transmission power according to the feedback value to stabilize the voltage at the receiving end.

[0005] Therefore, the existing technology still has some significant defects. First, although the integrated battery solution can reduce the pressure on the wireless power supply system, it will increase the size of the implanted part, increase the risk of surgery, and the battery implanted in the human body will bring safety risks for long-term use; second, the solution of using Bluetooth feedback to adjust the power supply has problems such as long feedback link, long response time, slow adjustment speed, etc., resulting in unsatisfactory power supply effect; third, because the load demand of the neurostimulator fluctuates with the working state, it is difficult for the external power supply device to adapt and adjust according to this change, resulting in serious power consumption waste and reducing the endurance of the external functional device. Summary of the invention

[0006] The purpose of the present invention is to provide a low-power charging method and device, storage medium and terminal for a neurostimulator, so as to solve the technical problems in the prior art of power consumption waste and difficulty in adapting and adjusting the charging method when charging a neurostimulator.

[0007] In a first aspect, the present invention provides a low-power charging method for a neurostimulator, comprising:

[0008] Adjust the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state;

[0009] Acquire working parameters of the neural stimulator to be charged, and based on the working parameters, acquire a timing rule of alternating between a pulse output state and an idle state when the neural stimulator to be charged is working;

[0010] According to the timing rule, using the external wireless charger to charge the neural stimulator to be charged in a preset charging method;

[0011] Among them, the preset charging method is: whenever the neurostimulator to be charged enters a pulse output state, the transmission output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; whenever the neurostimulator to be charged enters an idle state, the transmission output of the external wireless charger is turned off.

[0012] In one embodiment of the present invention, adjusting the time of the neural stimulator to be charged and the time of the external wireless charger to a synchronous state includes:

[0013] According to the carrier signal sent by the external wireless charger, the local clock of the neural stimulator to be charged is adjusted to a reference clock corresponding to the carrier signal to obtain the neural stimulator to be charged after the clock is adjusted;

[0014] Based on the synchronization code, aligning the working time of the neural stimulator to be charged after the clock is adjusted with the working time of the external wireless charger to obtain the neural stimulator to be charged after time synchronization;

[0015] The interaction mode of the synchronization code includes: being sent by the neural stimulator to be charged after the clock is adjusted and being received by the external wireless charger, or being sent by the external wireless charger and being received by the neural stimulator to be charged after the clock is adjusted.

[0016] In one embodiment of the present invention, according to the carrier signal sent by the external wireless charger, adjusting the local clock of the neural stimulator to be charged to a reference clock corresponding to the carrier signal includes:

[0017] Acquire a carrier signal sent by the external wireless charger;

[0018] Detecting edge changes of the carrier signal to obtain clock information corresponding to the edge changes;

[0019] The local clock of the neural stimulator to be charged is set as a reference clock corresponding to the clock information, and the neural stimulator to be charged with the reference clock set is used as the neural stimulator to be charged after the clock is adjusted.

[0020] In one embodiment of the present invention, the transmission output of the external wireless charger needs to satisfy a preset condition in order to supply power to the neural stimulator to be charged.

[0021] The preset condition includes: the energy received by the neural stimulator to be charged from the transmission output of the external wireless charger is greater than the sum of the energy consumed in the pulse output state and the energy consumed to charge the energy storage capacitor in the neural stimulator to be charged.

[0022] In one embodiment of the present invention, obtaining the timing rule of alternating between the pulse output state and the idle state of the neural stimulator to be charged based on the working parameters includes:

[0023] Based on the pulse frequency, the duration of a single working cycle is obtained, where the single working cycle is a basic unit of alternation between a pulse output state and an idle state;

[0024] Based on the pulse width and duty cycle, the duration of the pulse output state in a single working cycle is obtained as the single pulse duration;

[0025] Based on the duration of the single working cycle and the single pulse duration, acquiring the duration of the idle state in the single working cycle as the single idle duration;

[0026] The duration of a single working cycle, a single pulse duration and a single idle duration are combined as a timing rule for alternating between a pulse output state and an idle state when the neural stimulator to be charged is working;

[0027] Wherein, the operating parameters include the pulse frequency, the pulse width and the duty cycle.

[0028] In one embodiment of the present invention, it further includes:

[0029] Obtain the fully charged working time of the energy storage capacitor in the neural stimulator to be charged, and determine the relationship between the fully charged working time and the single idle time. If the fully charged working time is less than the single idle time, intermittently turn on the transmission output of the external wireless charger when the neural stimulator to be charged is in an idle state to replenish the energy of the energy storage capacitor.

[0030] In one embodiment of the present invention, the time before the external wireless charger starts transmitting and outputting the wireless charger is a preset time before the neural stimulator to be charged enters the pulse output state;

[0031] The preset advance time is the sum of the preheating time and the relative timing deviation; the preheating time is the time required for the external functional device to be turned on to energy stabilization, and the relative timing deviation is the difference between the local time of the neural stimulator to be charged and the local time of the external wireless charger corresponding to the local time of the neural stimulator to be charged.

[0032] In a second aspect, the present invention further provides a low-power charging device for a neurostimulator, characterized in that it comprises:

[0033] A time synchronization module, used to adjust the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state;

[0034] A parameter analysis module, used for obtaining working parameters of the neural stimulator to be charged, and analyzing the working parameters to obtain a timing rule of alternating between a pulse output state and an idle state when the neural stimulator to be charged is working;

[0035] An intermittent charging module, used to charge the neural stimulator to be charged using the external wireless charger in a preset charging manner according to the timing rule;

[0036] Among them, the preset charging method is: whenever the neurostimulator to be charged enters a pulse output state, the transmission output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; whenever the neurostimulator to be charged enters an idle state, the transmission output of the external wireless charger is turned off.

[0037] In a third aspect, the present invention further provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the low-power charging method for a neurostimulator as described above.

[0038] In a fourth aspect, the present invention further provides a terminal, comprising a processor and a memory, wherein the memory is communicatively connected to the processor;

[0039] The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes the low-power charging method for the neurostimulator as described above.

[0040] As described above, the low-power charging method and device, storage medium and terminal of the neurostimulator of the present invention have the following beneficial effects:

[0041] 1. By adjusting the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state, the operation of the external wireless charger can be aligned with the time of the neurostimulator to be charged. On this basis, the external wireless charger is controlled to charge based on the timing law of the neurostimulator to be charged using a preset charging method. This charging method is flexibly adjusted based on the actual working parameters of the neurostimulator to be charged, so it is more adaptable to neurostimulators with different parameters.

[0042] 2. The charging operation of the external wireless charger in the present invention matches the working cycle of the neurostimulator, which can ensure that energy is reasonably supplied in the pulse output state of the neurostimulator to be charged, while minimizing energy waste in the idle state, thereby significantly reducing the overall energy consumption of the external wireless charger in the process of charging the neurostimulator to be charged.

[0043] 3. By obtaining the sum of the preheating time and the relative timing deviation as the preset advance time, the charging operation of the external wireless charger is made more accurate, and the charging operation of the external wireless charger is more accurately synchronized with the working cycle of the neurostimulator, further reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic flow chart of a low-power charging method for a neural stimulator according to an embodiment of the present invention is shown.

[0045] Figure 2 A schematic diagram of the flow of time synchronization in the low-power charging method for a neural stimulator according to an embodiment of the present invention is shown.

[0046] Figure 3 A schematic diagram of a process for obtaining a timing rule based on working parameters in a low-power charging method for a neurostimulator according to an embodiment of the present invention is shown.

[0047] Figure 4 A schematic diagram showing a preset charging mode in the low-power charging method for a neurostimulator according to an embodiment of the present invention is shown.

[0048] Figure 5A flow chart of a preset interaction mode in a low-power charging method for a neurostimulator according to an embodiment of the present invention is shown.

[0049] Figure 6 A schematic structural diagram of a low-power charging device for a neurostimulator according to an embodiment of the present invention is shown.

[0050] Figure 7 A schematic diagram of the structure of a terminal according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0051] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0052] The following will explain in detail the principles and implementation methods of the low-power charging method and device, storage medium and terminal of the neurostimulator of this embodiment, so that those skilled in the art can understand the low-power charging method, device, storage medium and terminal of the neurostimulator of this embodiment without creative work.

[0053] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention provides a low-power charging method for a neural stimulator.

[0054] Figure 1 FIG. 1 is a flow chart showing a low power consumption charging method for a neural stimulator according to an embodiment of the present invention, referring to FIG. Figure 1 As shown, the low-power charging method for the neurostimulator according to the embodiment of the present invention mainly includes the following steps:

[0055] Step S100: adjusting the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state.

[0056] Specifically, the time of the neurostimulator to be charged is adjusted to a synchronization state with the time of the external wireless charger, which means that the speed of the neurostimulator to be charged and the external wireless charger is the same and the current time of the two is the same. After the two times are adjusted to a synchronization state, it can be ensured that the external wireless charger can accurately match the corresponding charging strategy based on the working state law of the neurostimulator to be charged, laying a time foundation for steps S200 and S300.

[0057] Optionally, Figure 2FIG. 1 shows a schematic diagram of a time synchronization process in a low-power charging method for a neural stimulator according to an embodiment of the present invention, with reference to FIG. Figure 2 As shown, adjusting the time of the neural stimulator to be charged and the time of the external wireless charger to a synchronous state includes:

[0058] Step S101: According to the carrier signal sent by the external wireless charger, the local clock of the neurostimulator to be charged is adjusted to a reference clock corresponding to the carrier signal to obtain the neurostimulator to be charged after the clock is adjusted.

[0059] The reference clock is the core part of the control device's working timing. The operation of the external wireless charger and the neurostimulator to be charged depends on their respective clock signals. The synchronization of the reference clock can ensure that the two are coordinated and consistent during operation without time deviation. Specifically, in this embodiment, the reference clock of the neurostimulator to be charged is not generated independently, but is obtained by recovering the carrier signal emitted by the external wireless charger. The external wireless charger sends a high-frequency carrier signal to the neurostimulator to be charged through the transmitting coil. This carrier is not only used for energy transmission, but also can carry clock information. The high-frequency carrier signal is a fixed-frequency sine wave or square wave signal with a strong timing characteristic. By processing the carrier signal, the clock information of the external wireless charger can be extracted, and then the local clock of the neurostimulator to be charged can be set based on the clock information, so as to achieve the purpose of synchronizing the reference clocks of the external wireless charger and the neurostimulator to be charged. It should be noted that in this embodiment, the neurostimulator to be charged is an implantable neurostimulator.

[0060] In one embodiment, step S101 adjusts the local clock of the neurostimulator to be charged to a reference clock corresponding to the carrier signal according to the carrier signal sent by the external wireless charger, including: obtaining the carrier signal sent by the external wireless charger; detecting the edge change of the carrier signal to obtain the clock information corresponding to the edge change; setting the local clock of the neurostimulator to be charged to the reference clock corresponding to the clock information, and using the neurostimulator to be charged set to the reference clock as the neurostimulator to be charged after the clock adjustment. Specifically, the carrier signal, as the main energy transmission medium of the external wireless charger, also carries the clock information of the external wireless charger. The edge change of the carrier can reflect the clock cycle of the external wireless charger. By detecting the edge (rising edge or falling edge) of the carrier signal, the clock information in the signal is extracted, and the local clock of the neurostimulator to be charged is adjusted to be synchronized with the clock information in the signal, so that it is consistent with the reference clock of the external wireless charger, so that the time update speed of the two is the same.

[0061] Step S102: Based on the synchronization code, the working time of the neural stimulator to be charged after the clock is adjusted is aligned with the working time of the external wireless charger to obtain the neural stimulator to be charged after time synchronization.

[0062] Specifically, after completing the clock synchronization, the current working time of the external wireless charger and the neurostimulator to be charged are further aligned through the interaction of synchronization codes, ensuring that in actual operation, the operation of the external wireless charger based on the timing law can align the time of the neurostimulator to be charged. The interaction mode of the synchronization code includes: sent by the neurostimulator to be charged after the clock is adjusted and received by the external wireless charger, or sent by the external wireless charger and received by the neurostimulator to be charged after the clock is adjusted. The synchronization code can be realized by modulating the transmission waveform of the external wireless charger, or it can be realized by reverse modulation of the neurostimulator to be charged. The former method is that the external wireless charger modulates the synchronization code on the carrier while transmitting wireless energy, and the neurostimulator to be charged obtains the synchronization code information by demodulating these signals; the latter method is that the neurostimulator to be charged actively sends the synchronization code information and provides real-time feedback to the external wireless charger, so that the external wireless charger can make precise time synchronization adjustments according to the synchronization code of the neurostimulator to be charged.

[0063] Step S200: obtaining the working parameters of the neurostimulator to be charged, and obtaining the timing regularity of the alternating transformation between the pulse output state and the idle state of the neurostimulator to be charged when the neurostimulator to be charged is working based on the working parameters.

[0064] Specifically, the working parameters of the neurostimulator to be charged determine the timing pattern of the alternating switching between its pulse output state and the idle state. Based on the analysis of the working parameters of the neurostimulator to be charged, the timing pattern of the alternating switching between the pulse output state and the idle state when the neurostimulator to be charged is working can be obtained.

[0065] Optionally, Figure 3 FIG. 1 is a flow chart showing a method for low-power charging of a neural stimulator according to an embodiment of the present invention, wherein the timing rule is obtained based on working parameters. Figure 3 As shown, obtaining the timing rule of alternating pulse output state and idle state when the neural stimulator to be charged is working based on the working parameters includes the following steps:

[0066] Step S201: Based on the pulse frequency, the duration of a single working cycle is obtained. The single working cycle is a basic unit of alternation between a pulse output state and an idle state.

[0067] Specifically, the working parameters are pulse parameters, which include pulse frequency, pulse width and duty cycle. The pulse frequency indicates the number of times the neurostimulator outputs electrical stimulation pulses per unit time, usually in Hertz (Hz). For example, a pulse frequency of 50Hz means 50 pulses are output per second; the pulse width refers to the duration of each electrical stimulation pulse, usually in microseconds (μs) or milliseconds (ms). The larger the pulse width, the longer the pulse output state lasts; the duty cycle refers to the proportion of the pulse output state to the entire working cycle. It is usually expressed as a percentage. For example, if the pulse output state lasts for 1ms in one cycle, and the entire cycle is 20ms, then the duty cycle is 5%.

[0068] The working state of the rechargeable neurostimulator is alternating between the pulse output state and the idle state, that is, the pulse output state, idle state, pulse output state, idle state, pulse output state, idle state... continuously repeat. Among them, each pulse output state and idle state constitutes a single working cycle. The duration of a single working cycle can be calculated based on the pulse frequency, and the quotient obtained by dividing 1 by the pulse frequency is the duration of a single working cycle. For example, when the pulse frequency is 50Hz, the duration of a single working cycle is 20ms.

[0069] Step S202: Based on the pulse width and the duty cycle, the duration of the pulse output state in a single working cycle is obtained as the single pulse duration.

[0070] Specifically, based on the pulse width and duty cycle, the duration of the pulse output state in a single working cycle can be calculated. The duration of a single pulse is equal to twice the pulse width. This is because the pulse output of the neurostimulator to be charged is a bipolar output signal. For example, when the pulse width is 100 μs, the duration of the pulse output state in a single working cycle is 200 μs.

[0071] Step S203: Based on the duration of a single working cycle and a single pulse duration, the duration of the idle state in the single working cycle is obtained as the single idle duration.

[0072] Specifically, the duration of the idle state in a single working cycle is taken as the single idle duration, which is equal to the duration of the single working cycle minus the single pulse duration. For example, if the single working cycle is 20ms and the single pulse duration is 200μs, then the single idle duration is 19.8ms.

[0073] Step S204: The duration of a single working cycle, a single pulse duration and a single idle duration are combined as a timing rule for alternating between the pulse output state and the idle state when the neural stimulator to be charged is working.

[0074] The alternating transformation of the pulse output state and the idle state is modeled as a timing model, which can describe the switching moment of the pulse output and the idle state in each cycle. Based on the duration of a single working cycle, a single pulse duration and a single idle duration, the timing law of the alternating transformation of the pulse output state and the idle state when the rechargeable neurostimulator is working can be accurately described.

[0075] Step S300: according to the timing rule, use an external wireless charger to charge the neurostimulator to be charged in a preset charging method.

[0076] Figure 4 A schematic diagram showing a preset charging method in a low-power charging method for a neurostimulator according to an embodiment of the present invention is shown, with reference to Figure 4 As shown, the preset charging method is: before the neurostimulator to be charged enters the pulse output state, the transmitting output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; after the neurostimulator to be charged enters the idle state, the transmitting output of the external wireless charger is turned off. The idle state refers to the standby time after the pulse output ends. At this time, the energy consumption of the neurostimulator is very low, and the energy storage capacitor can usually maintain the operation of the system. Since the timing law accurately describes the alternation between the pulse output state and the idle state when the neurostimulator to be charged is working, and the time of the external wireless charger and the neurostimulator to be charged is already in a synchronized state, the charging changes made by the external wireless charger can accurately correspond to the time of the stimulator to be charged. At the same time as the neurostimulator to be charged starts working, the external wireless charger can accurately know the timing law of the neurostimulator to be charged. Before the neurostimulator to be charged enters the pulse output state, the external wireless charger turns on the transmitting output; and after the neurostimulator to be charged enters the idle state, the external wireless charger turns off the transmitting output and stops supplying power. Therefore, the preset charging method coordinates the charging operation of the external wireless charger with the working cycle of the neurostimulator, which can ensure that energy is reasonably supplied in the pulse output state of the neurostimulator to be charged, and minimize energy waste in the idle state, so as to significantly reduce the overall energy consumption of the external wireless charger in the process of charging the neurostimulator to be charged.

[0077] Optionally, the transmission output of the external wireless charger needs to meet preset conditions in order to supply power to the neurostimulator to be charged. The preset conditions include: the energy received by the neurostimulator to be charged from the transmission output of the external wireless charger is greater than the sum of the energy required for the pulse output state and the energy required for charging the energy storage capacitor in the neurostimulator to be charged. That is, the energy transmitted and output by the external wireless charger can simultaneously cover the energy consumption of the pulse output of the neurostimulator to be charged and the energy consumption of charging the energy storage capacitor in the neurostimulator to be charged. The energy transmitted and output by the external wireless charger not only supports the pulse output of the neurostimulator to be charged, but also charges the energy storage capacitor. However, there is usually energy loss in the process from the transmission output of the external wireless charger to the reception by the neurostimulator to be charged. According to the actual situation, the energy loss is related to the transmission efficiency. Those skilled in the art can adjust the supply voltage of the transmission output of the external wireless charger according to the actual energy loss situation so as to meet the preset conditions.

[0078] Optionally, the low-power charging method for the neurostimulator in the embodiment of the present invention further includes: obtaining the fully charged working time of the energy storage capacitor in the neurostimulator to be charged, and judging the relationship between the fully charged working time and the single idle time. If it is less than the single idle time, when the neurostimulator to be charged is in an idle state, the transmission output of the external wireless charger is intermittently turned on to replenish the energy of the energy storage capacitor. Specifically, the fully charged working time of the energy storage capacitor refers to the time that the energy storage capacitor can maintain the normal operation of the neurostimulator to be charged when it is fully charged. The energy storage capacitor is discharged in the idle state of the neurostimulator to be charged, and the discharged current is the standby working current of the neurostimulator to be charged. The fully charged working time is equal to the quotient obtained by dividing the fully charged available charge by the standby working current. The fully charged available charge is the product of the capacitance value of the energy storage capacitor and the available voltage value. The available voltage value is the difference between the fully charged voltage of the energy storage capacitor and the reserved voltage. The reserved voltage is the sum of the shutdown critical voltage and the preset safety margin voltage. The shutdown critical voltage is the shutdown critical supply voltage of the neurostimulator to be charged, that is, when the supply voltage of the neurostimulator to be charged is lower than the shutdown critical voltage, it will automatically shut down. The preset safety margin voltage is a pre-set safety range from the shutdown critical voltage to better protect the neurostimulator to be charged. For example, the full charge voltage of the energy storage capacitor is 5V, the shutdown critical voltage is 3V, the preset safety margin voltage is 1V, the standby working current is 0.5mA, and the capacitance value of the energy storage capacitor is 10uF. Then the fully charged available charge is 10uF*(5V-1V-1V), which is 10uC, and the corresponding working time is 10uC / 0.5mA, which is 20ms.

[0079] Specifically, the fully charged working time of the energy storage capacitor is compared with the single idle time to determine whether the energy storage capacitor can support the energy demand in the entire idle state. If the fully charged working time is greater than the single idle time, the energy storage capacitor can support the energy demand in the entire idle state, and there is no need to use an external wireless charger for charging in the idle state. If the fully charged working time is less than the single idle time, the energy storage capacitor cannot support the entire idle time, and energy replenishment is required in the idle state to ensure the normal operation of the neurostimulator. In this embodiment, intermittent charging is used to save the energy consumption of the external wireless charger. In the idle state, the external wireless charger is turned on for a preset time after each preset interval, so as to supply the energy consumption of the neurostimulator to be charged within the preset time while replenishing the voltage of the energy storage capacitor. Intermittent charging can effectively avoid the risk of the energy storage capacitor running out of power during the idle period, ensuring that the neurostimulator remains stable before the next pulse output. Preferably, the preset interval is equal to the fully charged working time, and the preset time is the time required for the energy storage capacitor to be fully charged. At this time, the energy consumption of the external wireless charger can be minimized.

[0080] Optionally, after the neurostimulator to be charged enters an idle state, the time for turning off the transmission output of the external wireless charger has a preset delay compared to the time for the neurostimulator to be charged to enter the idle state, and the setting of the preset delay is required to satisfy the requirement that the energy storage capacitor in the neurostimulator to be charged is fully charged. That is, if the duration of a single pulse is greater than or equal to the time required for the energy storage capacitor to be fully charged, the preset delay is 0, and if the duration of a single pulse is less than the time required for the energy storage capacitor to be fully charged, the preset delay is the difference between the time required for the energy storage capacitor to be fully charged and the duration of a single pulse. The time required for the energy storage capacitor to be fully charged is a fixed parameter value of the neurostimulator to be charged.

[0081] Optionally, the advance time from when the external wireless charger's transmission output is turned on to when the neurostimulator to be charged enters the pulse output state is a preset advance time; that is, the advance time from when the external wireless charger's transmission output is turned on to when the neurostimulator to be charged enters the pulse output state is set to a preset advance time. The preset advance time is the sum of the preheating time and the relative timing deviation; the preheating time is the time required for the external functional device to stabilize energy from being turned on, and the relative timing deviation is the difference between the local time of the neurostimulator to be charged and the local time of the external wireless charger corresponding to the local time of the neurostimulator to be charged.

[0082] The relative positions of the external wireless charger and the neurostimulator to be charged are different, and the impedance reflected by the neurostimulator to be charged to the external wireless charger is different. Therefore, the load of the transmitting circuit of the external wireless charger is different. For different loads, the stabilization time (that is, the preheating time) of the transmitting energy is different. Specifically, the preheating time in this embodiment is:

[0083]

[0084] Among them, t is the preheating time, U 0 Supply voltage for the transmitting circuit, U c is the voltage when reaching stability (known parameter, usually 90%U 0 ), R coil is the internal resistance of the transmitting coil, R rect is the reflection impedance, and C is the capacitive load of the transmitting circuit. Specifically, the value of the reflection impedance can be calculated by sampling the transmitting current of the external wireless charger. When the external wireless charger is not close to the neural stimulator to be charged, the transmitting current can be sampled to obtain the normal current I coil , the transmission current can be sampled when the external wireless charger is close to the stimulator to obtain the power supply current I out , and then obtain the reflected impedance R based on the following formula rect :

[0085]

[0086] Therefore, this embodiment takes into account the changes in parameters such as capacitive load and reflected impedance, and accurately calculates the preheating time of the external wireless charger.

[0087] The relative timing deviation is obtained as follows:

[0088] Use the preset interaction mode to perform the first round of encoding, and obtain the corresponding first round of end B start encoding time, first round of end A start encoding time, and first round of end B complete decoding time;

[0089] Use the preset interaction mode to perform the second round of encoding, and obtain the corresponding second round B-side start encoding time and second round B-side complete decoding time;

[0090] Among them, the B end is the neural stimulator to be charged, and the A end is the external wireless charger. The amount of content encoded by the A end in the first round of encoding is equal to the amount of content encoded by the A end in the second round of encoding, and the amount of content encoded by the B end in the second round of encoding is a preset multiple of the amount of content encoded by the B end in the first round of encoding.

[0091] Figure 5 The figure shows a flow chart of a preset interaction mode in the low-power charging method for a neurostimulator according to an embodiment of the present invention. Figure 5 As shown, the preset interaction modes include:

[0092] The B end starts coding and records the corresponding B end coding start time;

[0093] After the B-side encoding is completed, obtain the B-side encoding result;

[0094] End B sends the encoding result of End B to End A;

[0095] End A decodes the encoding result of End B;

[0096] After the A end completes decoding, it starts encoding and records the corresponding A end encoding start time;

[0097] After the A-side encoding is completed, the A-side encoding result is obtained;

[0098] End A sends the encoding result of end A to end B;

[0099] The B end decodes the encoding result of the A end;

[0100] After the B end completes decoding, the corresponding B end decoding completion time is recorded.

[0101] The relative timing deviation is:

[0102] Tx= TB0- {TA1-[(TB1'-TB01')-(TB1-TB0)] / (n-1)}

[0103] Among them, Tx represents the relative timing error, TB0 represents the time when the B end starts encoding in the first round, TB1 represents the time when the B end completes decoding in the first round, TB0' represents the time when the B end starts encoding in the second round, TB1' represents the time when the B end completes decoding in the second round, TA1 represents the time when the A end starts encoding in the first round, and n is a multiple of the preset times.

[0104] Specifically, the embodiment of the present invention obtains the relative timing deviation through two rounds of two-way communication. Figure 5 As shown:

[0105] Round 1:

[0106] At time t0, end B starts encoding and records the current local time TB0 of end B as the time when end B starts encoding for the first round;

[0107] At time t1, end B completes encoding, obtains the encoding result of end B, and starts to transmit the encoding result of end B to end A;

[0108] At time t2, the waveform containing the encoding result of end B arrives at end A, and end A begins to decode the encoding result of end B;

[0109] At time t3, end A completes decoding, starts encoding, and records the current local time TA1 of end A;

[0110] At time t4, end A completes the encoding, obtains the encoding result of end A, and starts to transmit the encoding result of end A to end B;

[0111] At time t5, the waveform containing the encoding result of end A reaches end B, and end B starts decoding;

[0112] At time t6, the B terminal completes the decoding, obtains the decoding result of the B terminal, and records the local current time TB1 of the B terminal;

[0113] t1-t0 is the time required for encoding at the B end, recorded as Tb encoding, t6-t5 is the time required for decoding at the B end, recorded as Tb decoding, t4-t3 is the time required for encoding at the A end, recorded as Ta encoding, t3-t2 is the time required for decoding at the A end, recorded as Ta decoding, t2-t1 is the time required for waveform transmission at the AB end, t2-t1 is equal to t5-t4, recorded as T transmission. Then we have:

[0114] TB1-TB0=Tb encoding + T transmission + Ta decoding + Ta encoding + T transmission + Tb decoding

[0115] TA0 represents the local time of end A corresponding to the local time TB0 of end B, and must satisfy:

[0116] TA0=TA1-(Ta decoding+T transmission+Tb encoding)

[0117] Since the wireless power supply of the neurostimulator is near-field power supply (usually <5 cm), and the wireless waveform transmission is approximately the speed of light, T transmission can be ignored, so there is:

[0118] TA0=TA1-(Ta decoding + Tb encoding)

[0119] Round 2:

[0120] While keeping other conditions unchanged, the above complete process is repeated again, but the difference is that the amount of encoded content on the B side in the second round is n times that of the first round (for example, if the amount of encoded content in the first round is 100 bits, the amount of encoded content in the second round is n*100 bits), while the amount of encoded content on the A side remains unchanged.

[0121] Therefore, the time required for the second round of encoding at the B end Tb encoding' and the time required for decoding at the A end Ta decoding' satisfy:

[0122] Tb code'=n*Tb code

[0123] Ta decoding'=n*Ta decoding

[0124] TB0' indicates the time when the second round of encoding is started by end B, and TB1' indicates the time when the second round of decoding is completed by end B. TB0' and TB1' satisfy:

[0125] TB1'-TBO'=Tb encoding'+T transmission+Ta decoding+Ta encoding+T transmission+Tb decoding

[0126] [TB1'-TBO']-[TB1-TBO]=(n-1)(Ta decoding + Tb encoding)

[0127] So we have:

[0128] Ta decoding + Tb encoding = [(TB1'-TB01')-(TB1-TB0)] / (n-1)

[0129] TA0=TA1-[(TB1'-TB01')-(TB1-TB0)] / (n-1)

[0130] In the first round, TB0 is the local time of the neural stimulator to be charged, and TA0 is the local time of the external wireless charger corresponding to the local time of the neural stimulator to be charged. Then the relative timing deviation Tx is the difference between TA0 and TA1. The relative timing deviation is a fixed value, so it is also Tx in other interaction processes. In the prior art, due to the delay of synchronization code encoding, modulation, transmission, and decoding, there is still a fixed timing deviation between the external wireless charger and the neural stimulator to be charged. The embodiment of the present invention obtains the relative timing deviation through two rounds of two-way communication with timestamps.

[0131] According to the preheating time and the relative timing deviation, the corresponding preset advance time is set at the external wireless charger end, which can make the timing of turning on the transmission output of the external wireless charger to supply power to the neurostimulator to be charged more accurately match the pulse output state of the neurostimulator to be charged, avoid energy waste caused by starting too early or too late, and thus significantly reduce unnecessary energy loss in the power supply process.

[0132] The protection scope of the low-power charging method for a neurostimulator in an embodiment of the present invention is not limited to the execution order of the steps listed in this embodiment. All solutions implemented by adding, reducing or replacing steps in the prior art based on the principles of the present invention are included in the protection scope of the present invention.

[0133] The low-power charging method for a neurostimulator in an embodiment of the present invention adjusts the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state, so that the operation of the external wireless charger can be aligned with the time of the neurostimulator to be charged, and on this basis, the charging operation of the external wireless charger is matched with the timing law of the neurostimulator, which can ensure that the neurostimulator to be charged is supplied with energy while reducing the overall energy consumption. At the same time, the transmission output of the external wireless charger is turned on in advance based on the preset advance time, and the charging operation of the external wireless charger is synchronized with the working cycle of the neurostimulator with higher precision, further reducing energy consumption.

[0134] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention further provides a low-power charging device for a neural stimulator.

[0135] Figure 6 FIG. 1 shows a schematic diagram of a low-power charging device for a neural stimulator according to an embodiment of the present invention, referring to FIG. Figure 6 As shown, the low-power charging device of the neurostimulator according to the embodiment of the present invention includes a time synchronization module, a parameter analysis module and an intermittent charging module.

[0136] A time synchronization module, used to adjust the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state;

[0137] A parameter analysis module, used to obtain the working parameters of the neural stimulator to be charged, and analyze the working parameters to obtain the timing law of the alternating transformation between the pulse output state and the idle state of the neural stimulator to be charged when it is working;

[0138] An intermittent charging module is used to charge the neurostimulator to be charged using an external wireless charger in a preset charging method according to a time sequence rule;

[0139] Among them, the preset charging method is: whenever the neurostimulator to be charged enters the pulse output state, the transmission output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; whenever the neurostimulator to be charged enters the idle state, the transmission output of the external wireless charger is turned off.

[0140] The low-power charging device for the neurostimulator in the embodiment of the present invention adjusts the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state, so that the operation of the external wireless charger can be aligned with the time of the neurostimulator to be charged, and on this basis, the charging operation of the external wireless charger is matched with the timing law of the neurostimulator, which can ensure that the neurostimulator to be charged is supplied with energy while reducing the overall energy consumption. At the same time, the transmission output of the external wireless charger is turned on in advance based on the preset advance time, and the charging operation of the external wireless charger is synchronized with the working cycle of the neurostimulator with higher precision, further reducing energy consumption.

[0141] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention further provides a storage medium on which a computer program is stored, characterized in that when the program is executed by a processor, all steps of the low-power charging method of the neural stimulator of the embodiment are implemented.

[0142] The specific steps of the low-power charging method for a neurostimulator and the beneficial effects obtained by applying the readable storage medium provided in the embodiment of the present invention are the same as those in the above embodiment and will not be described in detail here.

[0143] A person of ordinary skill in the art can understand that all or part of the steps in the method for implementing the above embodiment can be completed by instructing a processor through a program, and the program can be stored in a computer-readable storage medium, and the storage medium is a non-transitory medium, such as a random access memory, a read-only memory, a flash memory, a hard disk, a solid-state hard disk, a magnetic tape, a floppy disk, an optical disc, and any combination thereof. The above storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid-state disk (SSD)), etc.

[0144] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention further provides a terminal. Figure 7 A schematic diagram of the structure of the terminal according to an embodiment of the present invention is shown, referring to Figure 7 As shown, the terminal of the embodiment of the present invention includes a processor and a memory, and the memory and the processor are communicatively connected; the memory is used to store computer programs, and the processor is used to execute the computer programs stored in the memory, so that the terminal executes all steps of the low-power charging method of the neurostimulator in the above embodiment.

[0145] The specific steps of the low-power charging method for a neurostimulator and the beneficial effects obtained by applying the terminal provided by the embodiment of the present invention are the same as those in the above embodiment and will not be described in detail here.

[0146] It should be noted that the memory may include random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage. Similarly, the processor may also be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0147] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A low-power charging method for a neurostimulator, comprising: Adjust the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state; Acquire working parameters of the neural stimulator to be charged, and based on the working parameters, acquire a timing rule of alternating between a pulse output state and an idle state when the neural stimulator to be charged is working; According to the timing rule, using the external wireless charger to charge the neural stimulator to be charged in a preset charging method; Among them, the preset charging method is: whenever the neurostimulator to be charged enters a pulse output state, the transmission output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; whenever the neurostimulator to be charged enters an idle state, the transmission output of the external wireless charger is turned off.

2. The low power consumption charging method according to claim 1, characterized in that: Synchronizing the time of the neurostimulator to be charged with the time of the external wireless charger includes: According to the carrier signal sent by the external wireless charger, the local clock of the neural stimulator to be charged is adjusted to a reference clock corresponding to the carrier signal to obtain the neural stimulator to be charged after the clock is adjusted; Based on the synchronization code, aligning the working time of the neural stimulator to be charged after the clock is adjusted with the working time of the external wireless charger to obtain the neural stimulator to be charged after time synchronization; The interaction mode of the synchronization code includes: being sent by the neural stimulator to be charged after the clock is adjusted and being received by the external wireless charger, or being sent by the external wireless charger and being received by the neural stimulator to be charged after the clock is adjusted.

3. The low power consumption charging method according to claim 2, characterized in that: According to the carrier signal sent by the external wireless charger, adjusting the local clock of the neural stimulator to be charged to a reference clock corresponding to the carrier signal includes: Acquire a carrier signal sent by the external wireless charger; Detecting edge changes of the carrier signal to obtain clock information corresponding to the edge changes; The local clock of the neural stimulator to be charged is set as a reference clock corresponding to the clock information, and the neural stimulator to be charged with the reference clock set is used as the neural stimulator to be charged after the clock is adjusted.

4. The low power consumption charging method according to claim 1, characterized in that: The transmission output of the external wireless charger needs to meet a preset condition in order to supply power to the neural stimulator to be charged. The preset conditions include: The energy received by the neural stimulator to be charged from the transmission output of the external wireless charger is greater than the sum of the energy consumed in the pulse output state and the energy consumed to charge the energy storage capacitor in the neural stimulator to be charged.

5. The low power consumption charging method according to claim 1, characterized in that: The timing rule of alternating between the pulse output state and the idle state of the neural stimulator to be charged when working is obtained based on the working parameters includes: Based on the pulse frequency, the duration of a single working cycle is obtained, where the single working cycle is a basic unit of alternation between a pulse output state and an idle state; Based on the pulse width and duty cycle, the duration of the pulse output state in a single working cycle is obtained as the single pulse duration; Based on the duration of the single working cycle and the single pulse duration, acquiring the duration of the idle state in the single working cycle as the single idle duration; The duration of a single working cycle, a single pulse duration and a single idle duration are combined as a timing rule for alternating between a pulse output state and an idle state when the neural stimulator to be charged is working; Wherein, the operating parameters include the pulse frequency, the pulse width and the duty cycle.

6. The low power consumption charging method according to claim 5, characterized in that: Also includes: Obtain the fully charged working time of the energy storage capacitor in the neural stimulator to be charged, and determine the relationship between the fully charged working time and the single idle time. If the fully charged working time is less than the single idle time, intermittently turn on the transmission output of the external wireless charger when the neural stimulator to be charged is in an idle state to replenish the energy of the energy storage capacitor.

7. The low power consumption charging method according to claim 2, characterized in that: The transmission output of the external wireless charger is turned on for a preset time period in advance of the time when the neural stimulator to be charged enters a pulse output state; The preset advance time is the sum of the preheating time and the relative timing deviation; the preheating time is the time required for the external functional device to be turned on to energy stabilization, and the relative timing deviation is the difference between the local time of the neural stimulator to be charged and the local time of the external wireless charger corresponding to the local time of the neural stimulator to be charged.

8. A low-power charging device for a neurostimulator, characterized in that: include: A time synchronization module, used to adjust the time of the neurostimulator to be charged and the time of the external wireless charger to a synchronous state; A parameter analysis module, used for obtaining working parameters of the neural stimulator to be charged, and analyzing the working parameters to obtain a timing rule of alternating between a pulse output state and an idle state when the neural stimulator to be charged is working; An intermittent charging module, used to charge the neural stimulator to be charged using the external wireless charger in a preset charging manner according to the timing rule; Among them, the preset charging method is: whenever the neurostimulator to be charged enters a pulse output state, the transmission output of the external wireless charger is turned on to supply power to the neurostimulator to be charged; whenever the neurostimulator to be charged enters an idle state, the transmission output of the external wireless charger is turned off.

9. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the low-power charging method for a neurostimulator according to any one of claims 1 to 7 is implemented.

10. A terminal, characterized in that: It includes a processor and a memory, and the memory is communicatively connected to the processor; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal executes the low-power charging method for a neurostimulator as described in any one of claims 1 to 7.

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