An electrical pulse output device and control method for a medium-frequency sinusoidal wave carrier wave.

Abstract

This application provides an electrical pulse output device and control method for an intermediate frequency (IF) sinusoidal wave carrier. The method includes the following steps: receiving a user-selected training mode and generating a control command based on the training mode, the control command including training pulse parameters and output intensity parameters. Generating an IF sinusoidal wave carrier and a training pulse signal according to the control command. Loading the training pulse signal onto the IF sinusoidal wave carrier using amplitude shift keying (APS) to form a composite stimulation signal. Adjusting the output amplitude of the composite stimulation signal using PWM control based on the output intensity parameters. Real-time acquisition of the output current and determination of whether the output current deviates from a preset output range. When the output current deviates from the preset output range, adjusting the duty cycle in the PWM control to perform closed-loop correction of the composite stimulation signal. Performing AC-DC blocking waveform filtering on the closed-loop corrected composite stimulation signal and outputting an electrical pulse signal. The above method improves output stability.

Description

Technical Field

[0001] This application relates to the field of electrical pulse output devices, and more particularly to an electrical pulse output device and control method for a medium-frequency sinusoidal wave carrier. Background Technology

[0002] With the increasing application of electrical stimulation technology in muscle training, rehabilitation therapy, and sports assistance, electrical pulse output devices are widely used to output stimulation signals of specific rhythms and intensities to target parts of the human body to achieve muscle activation, nerve stimulation, or training assistance. To meet the needs of different users, body parts, and training goals, existing electrical pulse output devices typically offer multiple training modes and achieve different stimulation effects by adjusting waveform type, pulse parameters, and output intensity.

[0003] However, most existing electrical pulse output methods still focus on directly outputting stimulation signals according to preset parameters. Although some devices can adjust the output intensity or switch modes, in actual use, the impedance of human skin is not constant, and the adhesion between the electrode pads and the skin is easily affected by factors such as sweating, movement, changes in contact pressure, and differences in the application site. This leads to fluctuations in the actual current of the electrical pulse signal during transmission. At the same time, when users switch between different training modes, the pulse parameters and output requirements corresponding to different modes also change. If the device only outputs according to fixed parameters without a dynamic adjustment mechanism to match the actual output state, inconsistencies between the output signal and the preset training requirements can easily occur.

[0004] However, when skin impedance changes, electrode adhesion fluctuates, or different training modes are switched, the output stimulation intensity and actual applied current easily deviate from the preset values, leading to unstable output and poor stimulation consistency, which in turn affects comfort and training effectiveness. Especially during continuous training or dynamic use, the above deviations further affect the smoothness, stability, and controllability of the electrical pulse output, making it difficult to balance output consistency and user experience across different training modes. Therefore, there is a need for an electrical pulse output device and control method with a mid-frequency sinusoidal carrier wave that improves output stability. Summary of the Invention

[0005] In view of this, it is necessary to provide an electrical pulse output device and control method for intermediate frequency sinusoidal wave carriers that improves output stability in order to solve the above problems.

[0006] Embodiments of this application provide an electrical pulse output device and control method for a medium-frequency sinusoidal wave carrier. In at least one embodiment of this application, the method includes the steps of: The system receives a training mode selected by the user and generates control instructions based on the training mode. The control instructions include at least training pulse parameters and output intensity parameters. The intermediate frequency sinusoidal carrier wave and training pulse signal are generated according to the control command; The training pulse signal is loaded onto the intermediate frequency sinusoidal carrier wave according to the amplitude keying method to form a composite stimulation signal; Based on the output intensity parameters, the output amplitude of the composite stimulation signal is adjusted using PWM control. The output current is collected in real time, and it is determined whether the output current deviates from the preset output range; When the output current deviates from the preset output range, the duty cycle in the PWM control mode is adjusted to perform closed-loop correction on the composite stimulus signal. The composite stimulus signal after closed-loop correction is subjected to waveform filtering with AC and DC blocking, and an electrical pulse signal is output.

[0007] In at least one embodiment of this application, generating control instructions based on the training mode includes the following steps: Invoke the preset carrier parameters and preset training pulse parameters corresponding to the training mode; The preset carrier parameters include at least the carrier frequency, and the preset training pulse parameters include at least the pulse width and the pulse duty cycle.

[0008] In at least one embodiment of this application, generating an intermediate frequency sinusoidal carrier wave according to the control command includes the following steps: A medium-frequency oscillation signal is generated by an RC oscillation circuit; The intermediate frequency oscillation signal is filtered by an LC filter network to obtain the intermediate frequency sinusoidal carrier wave; The frequency of the intermediate frequency sinusoidal carrier wave is 1800Hz-2200Hz, preferably 2000Hz.

[0009] In at least one embodiment of this application, generating the training pulse signal according to the control command includes the step of: A training pulse signal is generated according to the preset training pulse parameters corresponding to the training mode. The pulse width of the training pulse signal is 500 μs.

[0010] In at least one embodiment of this application, loading the training pulse signal onto the intermediate frequency sine wave carrier according to the amplitude keying method includes the following steps: Within the pulse duration interval corresponding to the training pulse signal, the amplitude of the intermediate frequency sinusoidal carrier wave is increased; Within the non-pulse duration interval corresponding to the training pulse signal, the amplitude of the intermediate frequency sinusoidal carrier wave is reduced; So that the training pulse signal is loaded onto the intermediate frequency sine wave carrier in the form of an amplitude envelope.

[0011] In at least one embodiment of this application, adjusting the output amplitude of the composite stimulus signal using PWM control based on the output intensity parameter includes the following steps: Set the initial duty cycle of the PWM according to the output intensity parameters; The output voltage of the composite stimulation signal is adjusted by changing the duty cycle in the PWM control method. The output voltage of the composite stimulation signal is continuously adjustable within the range of 0V-60V.

[0012] In at least one embodiment of this application, the preset output range includes a preset output upper limit and a preset output lower limit; The step of adjusting the duty cycle in the PWM control mode when the output current deviates from the preset output range includes the following steps: When the output current is higher than the preset output upper limit, the duty cycle is reduced; When the output current is lower than the preset lower limit, the duty cycle is increased.

[0013] In at least one embodiment of this application, the step of real-time acquisition of output current and determination of whether the output current deviates from a preset output range includes the following steps: Real-time acquisition of the output current signal after the composite stimulation signal is output to the electrode pad; Based on the output current signal, determine whether changes in skin impedance and fluctuations in electrode fit cause the output current to deviate from the preset output range; When the judgment result is yes, the duty cycle adjustment in the PWM control mode is triggered.

[0014] In at least one embodiment of this application, the step of performing pass / follow-block waveform filtering on the closed-loop corrected composite stimulus signal includes the following steps: The composite stimulus signal, after closed-loop correction, is input into multiple independent transformers; The composite stimulus signal is AC-coupled and DC-isolated using the multi-channel independent transformer; The output is an electrical pulse signal after being filtered by AC-DC waveform blocking.

[0015] An electrical pulse output device for a medium-frequency sinusoidal wave carrier includes: The control module is configured to receive a training mode selected by the user and generate control instructions based on the training mode. The control instructions include at least training pulse parameters and output intensity parameters. The waveform generation module is configured to generate an intermediate frequency sinusoidal carrier wave and a training pulse signal according to the control command. The modulation module is configured to load the training pulse signal onto the intermediate frequency sinusoidal carrier wave according to the amplitude keying method to form a composite stimulation signal; The output control module is configured to adjust the output amplitude of the composite stimulation signal using PWM control based on the output intensity parameter. The feedback adjustment module is configured to collect the output current in real time. The control module is also configured to set a preset output range and adjust the duty cycle in the PWM control mode when the output current deviates from the preset output range, so as to perform closed-loop correction on the composite stimulation signal. The filtering output module is configured to perform AC / DC blocking waveform filtering on the composite stimulus signal after closed-loop correction and output an electrical pulse signal. The aforementioned electrical pulse output device and controller for a medium-frequency sinusoidal carrier wave, by loading a training pulse signal onto the medium-frequency sinusoidal carrier wave to form a composite stimulus signal, and combining PWM amplitude modulation, real-time output current acquisition, deviation range judgment, duty cycle closed-loop correction, and AC / DC blocking waveform filtering, ensures that the electrical pulse output maintains a near-preset output strength and waveform state under different training modes and load conditions, thereby improving output stability, consistency, and comfort. Attached Figure Description

[0016] Figure 1 This is a flowchart of the control method for the electrical pulse output of the intermediate frequency sinusoidal carrier wave described in this application. Detailed Implementation

[0017] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0018] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0019] Embodiments of this application provide an electrical pulse output device and control method for a medium-frequency sinusoidal wave carrier. The method includes the following steps: S1: Receive the training mode selected by the user and generate control instructions according to the training mode. The control instructions include at least training pulse parameters and output intensity parameters.

[0020] S2: Generate an intermediate frequency sine wave carrier and a training pulse signal according to the control command.

[0021] S3: The training pulse signal is loaded onto the intermediate frequency sine wave carrier according to the amplitude keying method to form a composite stimulation signal.

[0022] S4: Based on the output intensity parameters, adjust the output amplitude of the composite stimulation signal using PWM control.

[0023] S5: Real-time acquisition of output current, and determination of whether the output current deviates from the preset output range.

[0024] S6: When the output current deviates from the preset output range, adjust the duty cycle in the PWM control mode to perform closed-loop correction on the composite stimulation signal.

[0025] S7: Performs waveform filtering on the closed-loop corrected composite stimulus signal, and outputs an electrical pulse signal.

[0026] The aforementioned electrical pulse output device and controller for a medium-frequency sinusoidal carrier wave, by loading a training pulse signal onto the medium-frequency sinusoidal carrier wave to form a composite stimulation signal, and combining PWM amplitude modulation, real-time acquisition of output current, deviation range judgment, duty cycle closed-loop correction, and AC / DC blocking waveform filtering, ensures that the electrical pulse output maintains a near-preset output strength and waveform state under different training modes and load conditions, thereby improving output stability, consistency, and comfort.

[0027] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] Please see Figure 1 This application provides a method for controlling the electrical pulse output of an intermediate frequency sinusoidal carrier wave, the method comprising the steps of: S1: Receive the training mode selected by the user and generate control instructions according to the training mode. The control instructions include at least training pulse parameters and output intensity parameters.

[0029] S2: Generate an intermediate frequency sine wave carrier and a training pulse signal according to the control command.

[0030] S3: The training pulse signal is loaded onto the intermediate frequency sine wave carrier according to the amplitude keying method to form a composite stimulation signal.

[0031] S4: Based on the output intensity parameters, adjust the output amplitude of the composite stimulation signal using PWM control.

[0032] S5: Real-time acquisition of output current, and determination of whether the output current deviates from the preset output range.

[0033] S6: When the output current deviates from the preset output range, adjust the duty cycle in the PWM control mode to perform closed-loop correction on the composite stimulation signal.

[0034] S7: Performs waveform filtering on the closed-loop corrected composite stimulus signal, and outputs an electrical pulse signal.

[0035] This embodiment provides an electrical pulse output control scheme for a mid-frequency sinusoidal carrier wave, which can be applied to muscle training, rehabilitation therapy, and sports assistive devices. Instead of directly outputting electrical pulses according to preset parameters, this scheme first generates control commands based on the user-selected training mode, and then sequentially completes carrier wave generation, training pulse generation, composite stimulation signal construction, output amplitude adjustment, output current monitoring, closed-loop correction, and final waveform processing. This ensures that the final output electrical pulse signal maintains good stability, consistency, and smoothness under different training modes.

[0036] In one specific embodiment, step S1 is executed first. The device receives the training mode selected by the user and generates control instructions based on the training mode. The training mode can be any one of a warm-up mode, a relaxation mode, a muscle-building mode, or a recovery mode, or it can be a user-defined training mode. Further, the control instructions include at least training pulse parameters and output intensity parameters. Training pulse parameters can include pulse width, pulse duty cycle, etc., while the output intensity parameters characterize the desired stimulation intensity level under the current training mode. The reason for establishing this control instruction first is that although existing devices can provide multiple training modes, many devices only switch mode names and do not further translate the mode differences into a practical basis for subsequent signal generation and output control. This results in insufficient differentiation of output effects under different modes, and even situations where the actual stimulation state remains unstable after mode switching. By generating control instructions first, the user-selected training objective can be concretized and parameterized, providing a unified basis for subsequent control steps.

[0037] Then, step S2 is executed. The device generates an intermediate frequency (IF) sinusoidal carrier and a training pulse signal according to the control command. In one specific embodiment, the IF sinusoidal carrier can generate an IF oscillation signal through an RC oscillation circuit, and then filter it through an LC filter network. Further, the frequency of the IF sinusoidal carrier can be set between 1800Hz and 2200Hz, for example, 2000Hz. At the same time, the device generates a training pulse signal according to the training pulse parameters in the control command. In a specific example, the pulse width of the training pulse signal can be 500μs. It should be noted that in this step, the IF sinusoidal carrier and the training pulse signal are generated separately, rather than outputting a single waveform from the beginning. This is because the IF sinusoidal carrier plays the role of smoothing the basic signal, while the training pulse signal plays the role of expressing the training rhythm and training mode differences. By generating them separately, the signal structure can be clearer, and it is also easier to construct a composite stimulation signal that has both smoothness and rhythm.

[0038] Next, step S3 is executed. The device loads the training pulse signal onto the intermediate frequency (IF) sinusoidal carrier wave according to the amplitude keying method to form a composite stimulation signal. In a specific embodiment, the amplitude of the IF sinusoidal carrier wave can be increased within the pulse duration interval corresponding to the training pulse signal; and the amplitude of the IF sinusoidal carrier wave can be decreased within the non-pulse duration interval corresponding to the training pulse signal, so that the training pulse signal is loaded onto the IF sinusoidal carrier wave in the form of an amplitude envelope. The signal formed in this way is neither a simple IF sinusoidal wave nor a simple pulse signal, but a composite stimulation signal with training rhythm information. The reason for this design is that if a single pulse signal is directly output in the prior art, it is easy to cause abrupt changes in the stimulation edge, affecting comfort; if only a smooth carrier wave is output, it is difficult to reflect the rhythm differences corresponding to different training modes. This step superimposes the training pulse information onto the IF sinusoidal carrier wave, so that the final output has both rhythm control capability and a smooth waveform basis, thereby improving the problems of harsh stimulation and insufficient pattern recognition.

[0039] After the composite stimulus signal is generated, step S4 is executed. The device adjusts the output amplitude of the composite stimulus signal using PWM control based on the output intensity parameters. In one specific embodiment, the initial duty cycle of the PWM can be set according to the output intensity parameters, and then the output voltage of the composite stimulus signal can be adjusted by changing the duty cycle in the PWM control mode, so that the output voltage of the composite stimulus signal is continuously adjustable within the range of 0V to 60V. The reason for this arrangement is that simply generating a composite stimulus signal can only solve the problems of rhythm construction and waveform foundation, and cannot guarantee that a suitable actual stimulus intensity can be obtained under different users, different parts, and different training needs. By introducing a PWM amplitude adjustment mechanism in this step, the overall output intensity can be continuously controlled without destroying the rhythmic structure of the composite stimulus signal, thereby taking into account both training effect and user comfort. Furthermore, the PWM duty cycle itself is also the most direct and easily responsive control quantity for subsequent closed-loop correction. Therefore, introducing PWM control at this stage also lays the foundation for subsequent dynamic correction.

[0040] Then, step S5 is executed. The device collects the output current in real time and determines whether the output current deviates from the preset output range. In a specific embodiment, after the composite stimulation signal is transmitted to the electrode pad through the output path, the output current signal flowing through the target part of the human body can be collected in real time, and the collection result can be compared with the preset output range corresponding to the current training mode. The preset output range may include a preset upper limit and a preset lower limit, thereby forming an allowable fluctuation range. The fundamental reason for setting this step is that the most prominent problem in the background technology is not just "whether the output signal can be generated", but "whether the output value set by the device is consistent with the actual current received by the human body". In actual use, skin impedance will change with sweating, movement, and attachment position, and the adhesion state between the electrode pad and the skin will also fluctuate, which will cause the actual current to deviate from the preset state. If the open-loop output is based only on the preset parameters without collecting the actual output current, the system cannot detect the deviation and naturally cannot correct it. Therefore, this step transforms the original open-loop output method into a dynamic control method based on the actual output state.

[0041] When the output current deviates from the preset output range, step S6 is executed. The device adjusts the duty cycle in the PWM control mode to perform closed-loop correction of the composite stimulation signal. In a specific embodiment, when the output current is higher than the preset upper limit of output, the PWM duty cycle is reduced, thereby reducing the actual output intensity; when the output current is lower than the preset lower limit of output, the PWM duty cycle is increased, thereby increasing the actual output intensity. Through this bidirectional adjustment mechanism, the actual output current can be brought back to the preset output range. The reason for using the duty cycle as the correction object at this stage is that the correspondence between "composite stimulation signal amplitude - PWM duty cycle" has been established in the aforementioned step S4. Therefore, adjusting the duty cycle can quickly and directly affect the output intensity without reconstructing the training pulse or regenerating the carrier. This correction method not only has a fast response but is also easy to execute repeatedly during continuous training, thereby adapting to the dynamic changes in the human body's state. Furthermore, through this closed-loop correction process, the output deviation caused by changes in skin impedance and fluctuations in electrode adhesion can be effectively reduced, making the stimulation effect in different training modes closer to the set value, improving stimulation consistency and training stability.

[0042] After completing the closed-loop correction, step S7 is executed. The device performs AC-coupled and DC-isolated waveform filtering on the closed-loop corrected composite stimulus signal and outputs an electrical pulse signal. In one specific embodiment, the closed-loop corrected composite stimulus signal can be input into a multi-channel independent transformer, which performs AC coupling and DC isolation on the composite stimulus signal, and then outputs the processed electrical pulse signal. It should be noted that this step is not a simple repetition of conventional isolation, but rather, after the aforementioned signal has completed rhythm construction, intensity adjustment, and closed-loop correction, waveform processing is performed on the output end to further improve the smoothness and stability of the output waveform. The reason for this setting is that even if the aforementioned steps have brought the output current close to the preset range, if the final output signal still contains DC components that are not acceptable to the human body or the waveform is not regular enough, it may still affect the user experience. By adding AC coupling and DC isolation processing at the end, the signal output state can be further optimized, making the final electrical pulse signal applied to the target part of the human body more stable and gentle, and also more conducive to maintaining comfort during continuous training.

[0043] In summary, this application first generates control commands through a training mode, transforming different training requirements into executable parameters; then, by generating a mid-frequency sinusoidal carrier wave and training pulse signals, and forming a composite stimulus signal using amplitude keying, the output has both a smooth carrier foundation and training rhythm information; next, continuous adjustment of the output intensity is achieved through PWM control, and further, real-time acquisition of the output current and closed-loop correction of the duty cycle are used to ensure that the actual operating current returns to the target range as much as possible; finally, the smoothness and stability of the output waveform are improved through AC-DC blocking waveform filtering at the end.

[0044] In one specific embodiment, generating control commands according to the training mode includes the steps of: invoking preset carrier parameters and preset training pulse parameters corresponding to the training mode. The preset carrier parameters include at least a carrier frequency, and the preset training pulse parameters include at least a pulse width and a pulse duty cycle.

[0045] The electrical pulse output device may include a housing, a main control circuit board, a mode selection component, a parameter storage component, a control component, a waveform generation component, and a pulse generation component. The main control circuit board is located in the central area inside the housing, and the mode selection component is located on the side of the housing facing the user. The parameter storage component, control component, waveform generation component, and pulse generation component are all located on the main control circuit board. Specifically, the mode selection component can be any of a button group, a knob, or a touch screen, allowing the user to select the corresponding training mode according to the training objective. The parameter storage component can be a storage chip or the internal storage area of ​​the controller, located close to the control component to shorten the signal retrieval path. The control component can be a microcontroller, a microprocessor, or a programmable controller chip, electrically connected to the mode selection component, parameter storage component, waveform generation component, and pulse generation component, respectively, for retrieving the corresponding parameters after receiving the training mode and outputting control signals to the subsequent execution unit. Through the above structural arrangement, a relatively clear sequential connection is formed between user input, parameter reading, and signal generation, so that the selection of the training mode can directly lead to the subsequent signal construction process.

[0046] Specifically, the parameter storage component can pre-establish multiple parameter storage areas, each corresponding to a different training mode. For example, in a specific application scenario, separate parameter areas can be set for a warm-up mode, a soothing mode, a muscle-building mode, and a recovery mode. Each parameter storage area stores corresponding preset carrier parameters and preset training pulse parameters. The preset carrier parameters include at least a carrier frequency, and the preset training pulse parameters include at least a pulse width and a pulse duty cycle. Further, when the user selects the warm-up mode through the mode selection component, the control component retrieves the carrier frequency, pulse width, and pulse duty cycle corresponding to the warm-up mode. When the user switches to the muscle-building mode, the control component stops retrieving the warm-up mode parameters and retrieves the carrier frequency, pulse width, and pulse duty cycle corresponding to the muscle-building mode. This establishes a one-to-one correspondence between the training mode and the parameters required for subsequent signal generation, rather than the system temporarily determining the parameter content at the later output stage. This avoids the problem in existing technologies where mode switching exists, but the correspondence between the mode and the actual output parameters is loose.

[0047] Furthermore, after receiving the mode selection signal, the control component can first identify the selected training mode, and then send a parameter read command to the parameter storage component. Upon receiving the read command, the parameter storage component transmits the preset carrier parameters and preset training pulse parameters corresponding to the training mode to the control component. After receiving the corresponding parameters, the control component sends the preset carrier parameters to the waveform generation component and the preset training pulse parameters to the pulse generation component. Further, the waveform generation component generates a corresponding intermediate frequency sine wave carrier based on the carrier frequency, and the pulse generation component generates a corresponding training pulse signal based on the pulse width and pulse duty cycle. Through this clearly defined front-end and back-end operation process, mode selection, parameter retrieval, and signal generation can form a continuous closed control flow. That is, after the user completes a training mode selection at the front end, the system back end can obtain a complete set of control parameters directly corresponding to that training mode, thus providing a unified foundation for the subsequent construction of composite stimulus signals.

[0048] It should be noted that in actual use, training modes often do not simply correspond to a single change in stimulus strength or weakness, but rather to different rhythms, durations, and output styles. If the overall output intensity is simply adjusted when switching modes without systematically adjusting core parameters such as carrier frequency, pulse width, and pulse duty cycle, the differences between different training modes may be insignificant, and there may even be cases where different modes have similar actual output effects.

[0049] In one specific embodiment, the electrical pulse output device may internally include a control component, an oscillation generation component, and a filtering and shaping component. The oscillation generation component and the filtering and shaping component are connected sequentially, and the control component is electrically connected to both the oscillation generation component and the filtering and shaping component. Specifically, the oscillation generation component may include an RC oscillation circuit, and the filtering and shaping component may include an LC filter network. The RC oscillation circuit is located in the front-stage signal generation area of ​​the main control circuit board, and the LC filter network is located on the rear-stage output side of the RC oscillation circuit and is arranged adjacent to the subsequent modulation component. Through the above arrangement, the intermediate frequency oscillation signal generated by the RC oscillation circuit can be directly input to the LC filter network for filtering and shaping, and then the LC filter network outputs an intermediate frequency sine wave carrier. This results in a shorter generation path for the intermediate frequency sine wave carrier, a more stable signal transmission process, and facilitates subsequent loading and combination with training pulse signals.

[0050] Specifically, the RC oscillation circuit can be constructed using resistive and capacitive elements, generating a periodic oscillation signal through the charging and discharging process of the resistor. Further, the resistance and capacitance values ​​in the RC oscillation circuit can be preset or switched accordingly under the control of the control component, thereby enabling the RC oscillation circuit to output an intermediate frequency oscillation signal within the target range. The LC filter network can be constructed using inductive and capacitive elements, with its input connected to the output of the RC oscillation circuit and its output connected to the subsequent signal processing path. Thus, after the intermediate frequency oscillation signal output by the RC oscillation circuit enters the LC filter network, the high-frequency noise components and spike components unfavorable to subsequent modulation can be suppressed by the LC filter network, thereby gradually transitioning the output waveform from an oscillation signal to a smoother intermediate frequency sinusoidal carrier wave.

[0051] Furthermore, after receiving the control command corresponding to the training mode, the control component can first read the carrier frequency parameter in the control command and control the RC oscillation circuit to enter the corresponding working state according to the carrier frequency parameter. After obtaining the corresponding working parameters, the RC oscillation circuit generates an intermediate frequency oscillation signal, which is then input to the LC filter network. The LC filter network filters the intermediate frequency oscillation signal and outputs an intermediate frequency sinusoidal carrier. Further, the frequency of the intermediate frequency sinusoidal carrier can be set in the range of 1800Hz to 2200Hz, and in a preferred embodiment, it can be set to 2000Hz. The reason for this setting is that if the carrier frequency is too low, the smoothing effect of the basic carrier is not obvious enough, and the output waveform after subsequent loading may still have a strong sense of abrupt change; if the carrier frequency is too high, it may increase the difficulty of subsequent output control, which is not conducive to the stable superposition of training pulse rhythm information. By limiting the carrier frequency to the range of 1800Hz to 2200Hz, and taking 2000Hz as a more suitable implementation, a better balance can be achieved between the smoothness, stability and subsequent modulation adaptability of the basic carrier.

[0052] It should be noted that in this embodiment, the use of an RC oscillation circuit to generate an intermediate frequency oscillation signal, followed by an LC filter network to obtain an intermediate frequency sinusoidal carrier wave, is not simply to obtain an oscillation signal, but to construct a stable, smooth, and suitable foundational waveform for carrying training rhythm information before the subsequent training pulse signal is applied. In existing technologies, directly outputting pulse signals can easily lead to steep stimulation edges and rapid output changes. When human skin impedance changes or electrode contact fluctuates, this type of output method is more likely to cause significant fluctuations in the actual applied current, thus affecting stimulation consistency and comfort. This embodiment, by first constructing an intermediate frequency sinusoidal carrier wave and then applying subsequent loading on this intermediate frequency sinusoidal carrier wave, is equivalent to first establishing a relatively gentle foundational environment, thereby providing a stable waveform basis for the formation of subsequent composite stimulation signals.

[0053] In one specific embodiment, after receiving a training mode, the control component can first call the preset training pulse parameters corresponding to the training mode from the parameter storage component, and then send the call result to the pulse generation component, so that the pulse generation component generates a training pulse signal according to the preset training pulse parameters, thereby giving the generation of the training pulse signal a clear parameter source, rather than being generated temporarily and randomly.

[0054] Specifically, the preset training pulse parameters may include at least pulse width and pulse duty cycle, where pulse width characterizes the duration of a single training pulse, and pulse duty cycle characterizes the proportion of the training pulse's effect within one cycle. Further, in this embodiment, the pulse width of the training pulse signal can be set to 500 μs. This is because the training pulse signal plays a crucial role in expressing the rhythmic characteristics of the training mode in this scheme. If the pulse width is set too small, the duration of a single training pulse will be too short, resulting in insufficient training rhythmic information after subsequent loading onto the intermediate frequency sine wave carrier, which is not conducive to forming a clearer composite stimulus rhythm. If the pulse width is set too large, the duration of a single training pulse will be too long, making the subsequent composite stimulus signal appear too heavy or sluggish during output, thus affecting the flexibility of rhythmic changes. By setting the pulse width to 500 μs, a better balance can be achieved between rhythmic expression and subsequent loading adaptation for a single training pulse, which is beneficial for both reflecting differences in training modes and ensuring a smooth transition in the subsequent output process.

[0055] During operation, after the user selects a training mode through the mode selection component, the control component first retrieves the preset training pulse parameters corresponding to the training mode from the parameter storage component based on the training mode recognition result. After obtaining the preset training pulse parameters, the control component sends control information including pulse width and pulse duty cycle to the pulse generation component. Upon receiving the control information, the pulse generation component generates the corresponding training pulse signal based on the pulse width and pulse duty cycle. Further, in this embodiment, the duration of a single training pulse generated by the pulse generation component is 500 μs, and multiple training pulses are continuously output according to the rhythm corresponding to the selected training mode, thereby forming a training pulse sequence matching the training mode. Furthermore, the training pulse sequence is sent to the subsequent modulation path after generation for loading and combination with an intermediate frequency sinusoidal carrier. Through this operation process, the generation of the training pulse signal no longer relies on manual real-time parameter adjustment but is automatically completed based on the preset training mode, thereby improving the standardization and repeatability of the training output.

[0056] It should be noted that while some existing electrical pulse output devices can be set to multiple modes, their pulse signal generation process often lacks a preset parameter calling mechanism that directly corresponds to the training mode. This easily leads to problems such as unclear pulse rhythm changes after mode switching and indistinct output differences between different modes. Especially in practical applications, when users switch between training, relaxation, or rehabilitation stages, if the training pulse signal cannot accurately switch with the mode change, subsequent composite stimulation signals, although output, cannot truly reflect the current training needs in terms of rhythmic characteristics. By pre-establishing the correspondence between training modes and training pulse parameters in this embodiment, and having the control component call the corresponding parameters to drive the pulse generation component to generate training pulse signals, the training pulse signals under different training modes can have clearer distinctions, thereby improving the problem of mismatch between mode switching and actual rhythmic output in existing technologies.

[0057] In one specific embodiment, the modulation component may include an amplitude control unit and an envelope loading unit. The amplitude control unit is located in the front-end region of the modulation component and is used to receive the modulation control signal output by the control component and switch the amplitude of the intermediate frequency (IF) sinusoidal carrier. The envelope loading unit is located in the rear-end region of the amplitude control unit and is used to output the amplitude-switched IF sinusoidal carrier as a composite stimulation signal with training pulse rhythm characteristics. Through the above connection and positional relationships, the IF sinusoidal carrier and the training pulse signal are not simply superimposed at the rear-end output, but rather form a loading relationship after entering the modulation component, with the former as the basis for carrying and the latter as the basis for rhythm control, thereby giving the subsequently formed composite stimulation signal a clearer structural hierarchy.

[0058] Specifically, after receiving the training pulse signal, the control component can identify the pulse duration interval and non-pulse duration interval in the training pulse signal and send the corresponding interval control information to the modulation component. Further, when the amplitude control unit in the modulation component receives the control information corresponding to the pulse duration interval, it increases the amplitude of the intermediate frequency (IF) sinusoidal carrier wave, so that the carrier output is at a higher amplitude during that period. When it receives the control information corresponding to the non-pulse duration interval, it decreases the amplitude of the IF sinusoidal carrier wave, so that the carrier output is at a lower amplitude during that period. Further still, the envelope loading unit continuously outputs the high-amplitude and low-amplitude segments, thereby causing the overall amplitude profile of the IF sinusoidal carrier wave to change with the training pulse signal, and ultimately loading the training pulse signal onto the IF sinusoidal carrier wave in the form of an amplitude envelope. Through this actuation process, the training pulse signal is no longer directly output as a single pulse, but is transformed into rhythmic control of the amplitude change of the IF sinusoidal carrier wave, thus forming a composite stimulus signal with training rhythm information.

[0059] Specifically, in a preferred embodiment, the modulation component may include a controllable gain circuit, an electronic switching unit, or a digitally controlled amplitude switching circuit. After the intermediate frequency (IF) sinusoidal carrier wave enters the controllable gain circuit, the controllable gain circuit, under the action of the interval control signal output by the control component, switches to a higher gain state during the pulse duration interval and to a lower gain state during the non-pulse duration interval. In this way, the amplitude of the IF sinusoidal carrier wave changes accordingly according to the temporal distribution of the training pulse signal, thereby forming an amplitude envelope consistent with the rhythm of the training pulse signal. Furthermore, since the IF sinusoidal carrier wave itself remains continuous, while the training pulse signal only reflects segmented control of its amplitude, the final output composite stimulation signal retains the relatively smooth basic waveform characteristics of the IF sinusoidal carrier wave and accurately reflects the training rhythm corresponding to the training pulse signal. In this way, the pulse rhythms corresponding to different training modes can not only be output but also be accepted by the human body in a gentler manner.

[0060] In one specific embodiment, the electrical pulse output device may internally include a control component, an output control component, a PWM adjustment component, and a voltage output component. The output control component is located between the modulation component and the subsequent output path. The PWM adjustment component is located inside the output control component or arranged parallel to it. The control component is electrically connected to both the PWM adjustment component and the output control component. The voltage output component is located on the subsequent output side of the output control component. Specifically, the control component can send a duty cycle setting signal to the PWM adjustment component based on the output intensity parameter corresponding to the current training mode. The PWM adjustment component generates a corresponding PWM control signal based on the duty cycle setting signal and sends the PWM control signal to the output control component. The output control component adjusts the output voltage of the composite stimulation signal based on the PWM control signal, and the voltage output component then sends the adjusted composite stimulation signal to the subsequent electrode output path. Through the above connection and positional relationships, a relatively clear front-to-back control chain is formed between the output intensity parameter, duty cycle adjustment, and output voltage change, enabling the amplitude adjustment of the composite stimulation signal to be continuously adjusted around a defined control quantity, rather than relying on simple gear switching.

[0061] Specifically, after receiving the control command corresponding to the training mode, the control component not only outputs carrier parameters and training pulse parameters to the preceding signal generation and modulation path, but also reads the output intensity parameters. Further, the control component can determine the initial duty cycle of the PWM based on the output intensity parameters and send this initial duty cycle to the PWM adjustment component. Upon receiving the initial duty cycle, the PWM adjustment component outputs a PWM control signal corresponding to the duty cycle, and the output control component then initially sets the output voltage of the composite stimulation signal based on this PWM control signal. This is because if a fixed voltage or fixed output level is used after the composite stimulation signal has been formed, it is difficult to precisely match the stimulation needs of different users, different training modes, and different body parts, easily leading to problems of excessive or insufficient stimulation. By setting the initial duty cycle of the PWM based on the output intensity parameters, the system can have a target output level corresponding to the current training mode at the beginning of the output stage, thus establishing a reasonable starting point for dynamic adjustment in subsequent actual use.

[0062] Furthermore, the PWM adjustment component may include a duty cycle generation unit and a duty cycle update unit. The duty cycle generation unit generates an initial duty cycle based on the output intensity parameters sent by the control component, and the duty cycle update unit corrects the duty cycle according to changes in the control signal during subsequent operation. The output control component may include a switch control unit, a drive amplification unit, and a voltage regulation unit. The switch control unit is connected to the PWM adjustment component and receives PWM control signals. The drive amplification unit is located after the switch control unit and amplifies the composite stimulus signal. The voltage regulation unit is located after the drive amplification unit and outputs a composite stimulus signal voltage corresponding to the current duty cycle. This configuration separates duty cycle generation and output voltage regulation into two interconnected control layers, allowing changes in the duty cycle of the preceding stage to stably and directly affect changes in the output voltage of the following stage, thereby improving the sensitivity and continuity of output amplitude regulation.

[0063] During operation, after the current-stage modulation component completes the construction of the composite stimulus signal, the composite stimulus signal is input to the output control component. Simultaneously, the control component sends an initial control command to the PWM adjustment component based on the output intensity parameters. The PWM adjustment component generates a corresponding initial PWM duty cycle based on this initial control command and sends the corresponding PWM control signal to the output control component. Upon receiving the PWM control signal, the output control component adjusts the output voltage of the composite stimulus signal by changing the internal switch on-time or equivalent control time ratio. Furthermore, when the duty cycle in the PWM control mode increases, the output voltage of the composite stimulus signal increases accordingly; when the duty cycle in the PWM control mode decreases, the output voltage of the composite stimulus signal decreases accordingly. In this way, the output voltage of the composite stimulus signal is no longer an immutable fixed value, but can continuously change with the duty cycle. Furthermore, in this embodiment, the output voltage of the composite stimulus signal can be continuously adjusted within the range of 0V to 60V, thereby adapting to the output requirements of different training modes and different user states.

[0064] In one specific embodiment, the electrical pulse output device may internally include a control component, an output current acquisition component, a range determination component, and a duty cycle adjustment component. The output current acquisition component is located between the output control component and the electrode output terminal. The range determination component is located inside the control component, or is located on one side of the control component as an independent determination circuit. The duty cycle adjustment component is located within the PWM adjustment component and is electrically connected to the control component. Specifically, the output current acquisition component may include a current sampling resistor, a current detection chip, or a current sensing circuit, used to acquire the corresponding output current signal in real time after the composite stimulation signal is output to the electrode pad and applied to the human body. The range determination component is used to compare the acquired output current signal with a preset output range. The duty cycle adjustment component is used to adjust the duty cycle in the PWM control mode by increasing or decreasing the duty cycle when the comparison result shows that the output current deviates from the preset output range. Through the above settings, a continuous closed control relationship is formed between the acquisition, determination, and correction actions of the actual output current, so that the output voltage adjustment is no longer a static adjustment after the previous stage setting, but can be dynamically tracked and corrected according to the actual operating state.

[0065] Specifically, the preset output range may include a preset upper output limit and a preset lower output limit. The preset upper output limit is used to define the highest allowable output current value in the current training mode, and the preset lower output limit is used to define the lowest allowable output current value in the current training mode. Further, the preset upper and lower output limits can be invoked by the control component based on the output intensity parameters corresponding to the current training mode, or they can be pre-written into the parameter storage component at the factory and read by the control component during mode switching. This is because the suitable range for the actual output current varies under different training modes, different application sites, and different user experience conditions. Without upper and lower limits, although the control system can collect the output current, it cannot clearly determine whether the current state has deviated from the target output range. By setting preset upper and lower output limits, the control system can identify both excessively high and excessively low output deviations, thus providing a clear basis for subsequent duty cycle adjustments.

[0066] During operation, the current-stage modulation component has generated a composite stimulation signal, and the output control component adjusts the output voltage of the composite stimulation signal according to the initial duty cycle. The composite stimulation signal is then transmitted to the electrode pads via the subsequent output path and applied to the target area of ​​the human body. At this time, the output current acquisition component acquires the output current signal flowing through the electrode pads in real time and transmits it to the range determination component. The range determination component compares the output current signal with the preset upper and lower output limits corresponding to the current training mode. Further, when the output current exceeds the preset upper output limit, the range determination component generates an output overshoot determination result and sends this result to the duty cycle adjustment component. Upon receiving the output overshoot determination result, the duty cycle adjustment component reduces the duty cycle in the PWM control mode, causing the output control component to lower the output voltage of the composite stimulation signal, thereby reducing the actual output current. Furthermore, when the output current is lower than the preset lower output limit, the range determination component generates a low output determination result and sends this result to the duty cycle adjustment component. Upon receiving the "low output" determination result, the duty cycle adjustment component increases the duty cycle in the PWM control mode, causing the output control component to increase the output voltage of the composite stimulus signal, thereby increasing the actual output current. Through this bidirectional adjustment process, the output current can be maintained between the preset upper and lower output limits during actual operation as much as possible.

[0067] In one specific embodiment, the electrical pulse output device may internally include a control component, an output current acquisition component, a range determination component, and a duty cycle adjustment component. The output current acquisition component is located between the output control component and the electrode output terminal. The range determination component is located inside the control component, or is located on one side of the control component as an independent determination circuit. The duty cycle adjustment component is located within the PWM adjustment component and is electrically connected to the control component. Specifically, the output current acquisition component may include a current sampling resistor, a current detection chip, or a current sensing circuit, used to acquire the corresponding output current signal in real time after the composite stimulation signal is output to the electrode pad and applied to the human body. The range determination component is used to compare the acquired output current signal with a preset output range. The duty cycle adjustment component is used to adjust the duty cycle in the PWM control mode by increasing or decreasing the duty cycle when the comparison result shows that the output current deviates from the preset output range. Through the above settings, a continuous closed control relationship is formed between the acquisition, determination, and correction actions of the actual output current, so that the output voltage adjustment is no longer a static adjustment after the previous stage setting, but can be dynamically tracked and corrected according to the actual operating state.

[0068] Specifically, the preset output range may include a preset upper output limit and a preset lower output limit. The preset upper output limit is used to define the highest allowable output current value in the current training mode, and the preset lower output limit is used to define the lowest allowable output current value in the current training mode. Further, the preset upper and lower output limits can be invoked by the control component based on the output intensity parameters corresponding to the current training mode, or they can be pre-written into the parameter storage component at the factory and read by the control component during mode switching. This is because the suitable range for the actual output current varies under different training modes, different application sites, and different user experience conditions. Without upper and lower limits, although the control system can collect the output current, it cannot clearly determine whether the current state has deviated from the target output range. By setting preset upper and lower output limits, the control system can identify both excessively high and excessively low output deviations, thus providing a clear basis for subsequent duty cycle adjustments.

[0069] During operation, the current-stage modulation component has generated a composite stimulation signal, and the output control component adjusts the output voltage of the composite stimulation signal according to the initial duty cycle. The composite stimulation signal is then transmitted to the electrode pads via the subsequent output path and applied to the target area of ​​the human body. At this time, the output current acquisition component acquires the output current signal flowing through the electrode pads in real time and transmits it to the range determination component. The range determination component compares the output current signal with the preset upper and lower output limits corresponding to the current training mode. Further, when the output current is higher than the preset upper output limit, the range determination component generates an "output too high" determination result and sends this result to the duty cycle adjustment component. Upon receiving the "output too high" determination result, the duty cycle adjustment component reduces the duty cycle in the PWM control mode, causing the output control component to lower the output voltage of the composite stimulation signal, thereby reducing the actual output current. Furthermore, when the output current is lower than the preset lower output limit, the range determination component generates a "low output" determination result and sends this result to the duty cycle adjustment component. Upon receiving the "low output" determination result, the duty cycle adjustment component increases the duty cycle in the PWM control mode, causing the output control component to increase the output voltage of the composite stimulus signal, thereby increasing the actual output current. Through this bidirectional adjustment process, the output current can be maintained between the preset upper and lower output limits during actual operation as much as possible.

[0070] In one specific embodiment, the electrical pulse output device may internally include a control component, an output control component, a closed-loop correction path, a filter output component, and an electrode output component. The closed-loop correction path is located after the output control component, and the filter output component is located between the closed-loop correction path and the electrode output component. The control component is electrically connected to both the output control component and the filter output component. Specifically, the filter output component may include an input distribution unit, multiple independent transformers, and an output aggregation unit. The input distribution unit is located in the pre-stage region of the filter output component and is used to receive the closed-loop corrected composite stimulation signal and distribute it to the corresponding transformer path. The multiple independent transformers are arranged in parallel in the rear region of the input distribution unit. Each independent transformer has an input terminal and an output terminal. Each input terminal is connected to the input distribution unit, and each output terminal is connected to the output aggregation unit. The output aggregation unit is then connected to the electrode output component. Through the above connection and position settings, the composite stimulation signal after closed-loop correction passes through a filter output path composed of multiple independent transformers before entering the target part of the human body. This ensures that the subsequent output is not sent out directly after correction, but is further processed by AC coupling and DC isolation at the output end.

[0071] Specifically, the multiple independent transformers can be arranged sequentially along the output side of the main control circuit board, preferably close to the electrode output assembly, so that the processed electrical pulse signal can be sent to the electrode pads via a shorter path. Furthermore, each of the independent transformers can correspond to different output branches, different electrode channels, or different filtering paths for the same output signal. This arrangement is because, although the composite stimulation signal after closed-loop correction has been adjusted to return to the target output range as much as possible through pre-stage duty cycle adjustment, it is still a circuit-side output signal before entering the human body. If this signal is directly applied to the electrode pads, it may still contain DC components, coupling bias, or irregular output states that are unacceptable to the human body. By setting multiple independent transformers at the output end, the AC coupling characteristics of the transformers can be used to effectively transmit the AC components in the signal, and the DC blocking characteristics of the transformers can be used to block the DC components that do not need to be directly applied to the human body, thus making the final electrical pulse signal output to the electrode pads more suitable for human acceptance.

[0072] During operation, after the current-level control component completes training mode invocation, carrier generation, training pulse loading, PWM output adjustment, and closed-loop correction based on output current, the composite stimulation signal after closed-loop correction first enters the closed-loop correction path from the output control component, and then is input to the input distribution unit in the filter output component. The input distribution unit distributes the composite stimulation signal to the input terminals of each independent transformer according to the current output branch settings. Further, after receiving the composite stimulation signal, each independent transformer transmits the signal change through magnetic coupling between its input and output windings, coupling the AC change portion of the composite stimulation signal to the output side, while the DC bias portion is not directly transmitted to the output side. Further still, the signals output from each independent transformer are sent to the output aggregation unit, where they are integrated to form an electrical pulse signal that has undergone AC-blocking and DC-blocking waveform filtering. This signal is then transmitted to the electrode plates by the electrode output component and finally applied to the target area of ​​the human body. Through this process, the composite stimulation signal is not directly output after completing the closed-loop correction. Instead, it goes through an end-processing path with multiple independent transformers as its core, so that the final output signal has a more stable, smoother and more suitable output state on the human body side.

[0073] An electrical pulse output device for a mid-frequency sinusoidal carrier wave includes: a housing, a main control board, a power supply assembly, a control module, a waveform generation module, a modulation module, an output control module, a feedback adjustment module, a filter output module, and an electrode output assembly. The control module is configured to receive a user-selected training mode and generate control commands based on the training mode. The control commands include at least training pulse parameters and output intensity parameters. The waveform generation module is configured to generate a mid-frequency sinusoidal carrier wave and a training pulse signal based on the control commands. The modulation module is configured to load the training pulse signal onto the mid-frequency sinusoidal carrier wave using amplitude shift keying (APS) to form a composite stimulation signal. The output control module is configured to adjust the output amplitude of the composite stimulation signal using PWM control based on the output intensity parameters. The feedback adjustment module is configured to acquire the output current in real time. The control module is also configured to set a preset output range and adjust the duty cycle in the PWM control mode when the output current deviates from the preset output range to perform closed-loop correction of the composite stimulation signal. The filtering output module is configured to perform AC / DC blocking waveform filtering on the composite stimulus signal after closed-loop correction and output an electrical pulse signal. Each of these modules is described in detail in any step of a control method for electrical pulse output of a medium-frequency sinusoidal carrier wave, and will not be repeated here.

[0074] Therefore, the above-mentioned medium-frequency sinusoidal wave carrier electrical pulse output device and control method load the training pulse signal onto the medium-frequency sinusoidal wave carrier to form a composite stimulation signal. Combined with PWM amplitude modulation, real-time acquisition of output current, deviation range judgment, duty cycle closed-loop correction, and AC / DC blocking waveform filtering, the electrical pulse output can maintain as close as possible to the preset output strength and waveform state under different training modes and load conditions, thereby improving output stability, consistency and comfort.

[0075] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A method for controlling the output of electrical pulses from a medium-frequency sinusoidal carrier wave, characterized in that, The method includes the following steps: The system receives a training mode selected by the user and generates control instructions based on the training mode. The control instructions include at least training pulse parameters and output intensity parameters. The intermediate frequency sinusoidal carrier wave and training pulse signal are generated according to the control command; The training pulse signal is loaded onto the intermediate frequency sinusoidal carrier wave according to the amplitude keying method to form a composite stimulation signal; Based on the output intensity parameters, the output amplitude of the composite stimulation signal is adjusted using PWM control. The output current is collected in real time, and it is determined whether the output current deviates from the preset output range; When the output current deviates from the preset output range, the duty cycle in the PWM control mode is adjusted to perform closed-loop correction on the composite stimulus signal. The composite stimulus signal after closed-loop correction is subjected to waveform filtering with AC and DC blocking, and an electrical pulse signal is output.

2. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 1, characterized in that, The step of generating control commands based on the training mode includes the following steps: Invoke the preset carrier parameters and preset training pulse parameters corresponding to the training mode; The preset carrier parameters include at least the carrier frequency, and the preset training pulse parameters include at least the pulse width and the pulse duty cycle.

3. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 2, characterized in that, The step of generating an intermediate frequency sinusoidal carrier wave according to the control command includes the following steps: A medium-frequency oscillation signal is generated by an RC oscillation circuit; The intermediate frequency oscillation signal is filtered by an LC filter network to obtain the intermediate frequency sinusoidal carrier wave; The frequency of the intermediate frequency sinusoidal carrier wave is 1800Hz-2200Hz, preferably 2000Hz.

4. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 2, characterized in that, The step of generating the training pulse signal according to the control command includes the following steps: A training pulse signal is generated according to the preset training pulse parameters corresponding to the training mode. The pulse width of the training pulse signal is 500 μs.

5. The control method for the electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 4, characterized in that, The step of loading the training pulse signal onto the intermediate frequency sinusoidal carrier wave according to the amplitude keying method includes the following steps: Within the pulse duration interval corresponding to the training pulse signal, the amplitude of the intermediate frequency sinusoidal carrier wave is increased; Within the non-pulse duration interval corresponding to the training pulse signal, the amplitude of the intermediate frequency sinusoidal carrier wave is reduced; So that the training pulse signal is loaded onto the intermediate frequency sine wave carrier in the form of an amplitude envelope.

6. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 1, characterized in that, The step of adjusting the output amplitude of the composite stimulation signal using PWM control based on the output intensity parameter includes the following steps: Set the initial duty cycle of the PWM according to the output intensity parameters; The output voltage of the composite stimulation signal is adjusted by changing the duty cycle in the PWM control method. The output voltage of the composite stimulation signal is continuously adjustable within the range of 0V-60V.

7. The control method for the electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 6, characterized in that, The preset output range includes a preset upper limit and a preset lower limit; The step of adjusting the duty cycle in the PWM control mode when the output current deviates from the preset output range includes the following steps: When the output current is higher than the preset output upper limit, the duty cycle is reduced; When the output current is lower than the preset lower limit, the duty cycle is increased.

8. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 7, characterized in that, The real-time acquisition of output current and determination of whether the output current deviates from the preset output range includes the following steps: Real-time acquisition of the output current signal after the composite stimulation signal is output to the electrode pad; Based on the output current signal, determine whether changes in skin impedance and fluctuations in electrode fit cause the output current to deviate from the preset output range; When the judgment result is yes, the duty cycle adjustment in the PWM control mode is triggered.

9. The control method for electrical pulse output of a medium-frequency sinusoidal carrier wave according to claim 1, characterized in that, The process of filtering the composite stimulus signal after closed-loop correction using a waveform with alternating current and cross-current characteristics includes the following steps: The composite stimulus signal, after closed-loop correction, is input into multiple independent transformers; The composite stimulus signal is AC-coupled and DC-isolated using the multi-channel independent transformer; The output is an electrical pulse signal after being filtered by AC-DC waveform blocking.

10. An electrical pulse output device for a medium-frequency sinusoidal wave carrier wave, characterized in that, include: The control module is configured to receive the training mode selected by the user and generate control instructions according to the training mode. The control instructions include at least training pulse parameters and output intensity parameters. The waveform generation module is configured to generate an intermediate frequency sinusoidal carrier wave and a training pulse signal according to the control command. The modulation module is configured to load the training pulse signal onto the intermediate frequency sinusoidal carrier wave according to the amplitude keying method to form a composite stimulation signal; The output control module is configured to adjust the output amplitude of the composite stimulation signal using PWM control based on the output intensity parameter. The feedback adjustment module is configured to collect the output current in real time. The control module is also configured to set a preset output range and adjust the duty cycle in the PWM control mode when the output current deviates from the preset output range, so as to perform closed-loop correction on the composite stimulation signal. The filter output module is configured to perform pass-through and block-through waveform filtering on the composite stimulus signal after closed-loop correction and output an electrical pulse signal.

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