Electric stimulation pulse control method and control system

Abstract

In order to solve the technical problem that after the existing electrical stimulation equipment outputs electrical stimulation pulses to the human body, the different individual impedances of the human body and the differences in usage methods will lead to large differences in the parameters of the pulses output by the same device in different scenarios, which greatly affects the therapeutic effect of the electrical stimulation equipment products, the present invention provides an electrical stimulation pulse control method and control system, which converts the electrical stimulation pulse data generated according to the needs into analog signals, and then outputs them after being sequentially controlled and amplified. At the same time as the output, the output pulse analog signals are collected, and the electrical stimulation pulse data generated according to the user needs are adjusted according to the output pulse analog signals, forming a closed-loop control mode. The generated electrical stimulation pulse data can be adjusted in real time according to the real-time output of the pulse analog signals, thereby ensuring the accuracy of the output pulse analog signals.

Description

Technical Field

[0001] The present invention specifically relates to an electric stimulation pulse control method and a control system. Background Art

[0002] In medicine, pulsed currents with frequencies below 1000Hz are referred to as low-frequency currents or low-frequency pulsed currents. The application of low-frequency pulsed currents to the human body to treat disease is called low-frequency electrotherapy. Currently, in the physical therapy industry, low-frequency electrotherapy is primarily categorized into neuromuscular electrical stimulation (NMES), transcutaneous electrical nerve stimulation (TENS), functional electrical stimulation (FES), electroacupuncture (EA), and acupressure therapy. Regardless of the type of therapy, the essence is to use the physiological effects produced by different low-frequency pulsed currents in the human body to treat the corresponding disease. Different currents produce different physiological effects in the human body, and accordingly, different low-frequency electrostimulation devices produce different pulses.

[0003] Parameters describing electrical stimulation waveforms typically include waveform, frequency, pulse width, amplitude, rise time, and fall time. Waveforms can be divided into unidirectional and bidirectional waves based on the polarity of the pulse and the direction of the current. Bidirectional waves can be further divided into balanced waves and unbalanced waves based on their symmetry. Pulse shapes can also be divided into sinusoidal, rectangular, triangular, sawtooth, and trapezoidal waves. Frequency refers to how quickly a pulse recurs, usually expressed as the number of pulses per second, measured in Hertz (Hz). The frequency of low-frequency electrical stimulation pulses is typically no greater than 1000Hz. Pulse width refers to the duration of a pulse, measured in microseconds (uS), milliseconds (mS), or seconds (S). The pulse width of low-frequency electrical stimulation pulses is typically no greater than 1mS. Amplitude refers to the magnitude of pulse energy, which can be expressed in terms of current and voltage. When expressed in terms of current, the units are usually milliamperes (mA) or amperes (A), and when expressed in terms of voltage, the units are usually millivolts (mV) or volts (V). There is a certain degree of equivalence between voltage and current, and their equivalent conversion relationship is Ohm's law: V = I*R, where V represents voltage, I represents current, and R represents the load resistance. The maximum amplitude of a low-frequency electrical stimulation pulse when expressed in terms of current is no more than 100mA, and when expressed in terms of voltage, the maximum amplitude is no more than 100V (typical load is 1 kiloohm). Rise time refers to the time it takes for the pulse amplitude to increase from the minimum value to the set value at the beginning of a treatment, and is usually measured in seconds (s). In low-frequency electrical stimulation therapy, the higher the current, the more pronounced the effect on the human body. If a large current is applied to the patient at the beginning of treatment, it may exceed the patient's tolerance, causing discomfort or injury. Therefore, the pulse amplitude needs to be gradually increased from the minimum to the maximum at the beginning of treatment. The rise time of low-frequency electrical stimulation is usually 0-10s. The wave drop time corresponds to the wave rise time, which refers to the time it takes for the pulse amplitude to gradually decrease from the maximum to the minimum at the end of a treatment. The unit is seconds (S). The wave drop time of low-frequency electrical stimulation is usually 0-10S.

[0004] Under current technology, electrical stimulation pulses are mostly generated digitally or analogically, producing pulses of fixed amplitude. These pulses are then amplified and output using an adjustable power supply or amplification circuit with a variable amplification factor. When the electrical stimulation pulses are delivered to the human body, due to individual differences in human impedance and usage, the output pulse parameters of the same device can vary significantly in different scenarios, significantly impacting the therapeutic effectiveness of these devices. Summary of the Invention

[0005] The present invention provides an electrical stimulation pulse control method and control system to solve the technical problem that after the existing electrical stimulation equipment outputs electrical stimulation pulses to the human body, the different individual impedances of the human body and the differences in usage methods will cause the parameters of the pulses output by the same device in different scenarios to have large differences, which greatly affects the therapeutic effect of the electrical stimulation equipment products.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for controlling an electrical stimulation pulse, which is special in that it comprises the following steps:

[0008] S1, converting the electrical stimulation pulse data generated according to user needs into a pulse analog signal corresponding to the pulse parameters;

[0009] S2, controlling the continuous output time and pause output time of the pulse in the pulse analog signal according to user needs;

[0010] S3, after amplifying the amplitude of the pulse analog signal, output the pulse analog signal; at the same time, collecting the output pulse analog signal, and adjusting the electrical stimulation pulse data generated according to user needs in step S1 according to the amplitude information of the output pulse analog signal;

[0011] S4, repeatedly executing steps S1 to S3, and continuously controlling the electrical stimulation pulses so that the electrical stimulation pulses meet the needs of the user.

[0012] Furthermore, in step S1, the pulse parameters include pulse waveform, frequency, duty cycle and pulse amplitude; and the pulse amplitude of the pulse simulation signal is proportional to the amplitude of the electrical stimulation pulse data generated according to user needs.

[0013] Furthermore, in step S3, amplifying the amplitude of the pulse analog signal specifically comprises amplifying the amplitude of the pulse analog signal in sequence by one of voltage amplification, current amplification, power amplification, or any combination thereof.

[0014] The present invention also provides an electrical stimulation pulse control system, which is special in that it includes a feedback circuit, and a controller, a digital-to-analog conversion module, a timing control module, an amplifying circuit, an isolation circuit and an output module connected in sequence;

[0015] The digital-to-analog conversion module is used to convert the electrical stimulation pulse data generated according to user needs into a pulse analog signal;

[0016] The timing control module is used to control the continuous output time and continuous pause time of the pulse in the pulse analog signal;

[0017] The amplifier circuit is used to amplify the amplitude of the pulse analog signal;

[0018] The isolation circuit is used to electrically isolate the pulse analog signal;

[0019] The output module is used to output the amplified pulse analog signal;

[0020] The feedback circuit is connected between the isolation circuit and the controller.

[0021] Furthermore, it also includes a protection circuit connected between the isolation circuit and the output module, which is used to prevent static electricity on the user's body from damaging the control system.

[0022] Furthermore, the timing control module includes a MOS tube Q5, a resistor R60, a resistor R62 and a resistor R113;

[0023] One end of the resistor R62 is connected to the external control signal, and the other end is connected to the gate of the MOS transistor Q5;

[0024] One end of the resistor R113 is connected to the first constant voltage, and the other end is connected to the resistor R62 and an external control signal;

[0025] One end of the resistor R60 is connected to the drain of the MOS tube Q5, and the other end is connected to the output end of the digital-to-analog conversion module;

[0026] The source of the MOS transistor Q5 is grounded.

[0027] Furthermore, the amplifying circuit includes a resistor R11, an operational amplifier U9 and an operational amplifier U7;

[0028] The non-inverting input terminal of the operational amplifier U9 is connected to the adjustment terminal of the adjustable resistor R13, and the adjustable resistor R13 is connected between the other end of the resistor R60 and the ground; a resistor R18 is provided between the inverting input terminal of the operational amplifier U9 and the ground, and the end of the resistor R18 connected to the inverting input terminal of the operational amplifier U9 is also connected to the output terminal of the operational amplifier U9;

[0029] The non-inverting input terminal of the operational amplifier U7 is connected to the output terminal of the operational amplifier U9 through capacitor C41 and polar capacitor E3, and the positive electrode of polar capacitor E3 is connected to the non-inverting input terminal of the operational amplifier U7; the inverting input terminal of the operational amplifier U7 is connected to the positive electrode of polar capacitor E1, and the negative electrode of polar capacitor E1 is grounded through resistor R16; one end of the resistor R11 is connected to the negative electrode of polar capacitor E1, and the other end is connected to the operational amplifier U7 and the isolation circuit.

[0030] Furthermore, the isolation circuit includes an isolation transformer T1;

[0031] The primary side of the isolation transformer T1 is connected in parallel with a capacitor C30 and a polar capacitor E5, the negative electrode of the polar capacitor E5 is grounded through a resistor R20, the positive electrode of the polar capacitor E5 is connected to the negative electrode of the polar capacitor E2, and the positive electrode of the polar capacitor E2 is connected to the output terminal of the operational amplifier U7;

[0032] The secondary side of the isolation transformer T1 is connected to the protection circuit;

[0033] The other end of the resistor R11 is connected to the negative electrode of the polarity capacitor E5.

[0034] Furthermore, the feedback circuit includes an operational amplifier U5 and an optocoupler U8;

[0035] The positive electrode of the input end of the optical coupler U8 is connected to the secondary side of the isolation transformer T1 through the resistor R15, and the negative electrode of the input end is connected to the secondary side of the isolation transformer T1 through the diode D6, and the positive electrode of the diode D6 is connected to the negative electrode of the input end of the optical coupler U8;

[0036] The collector of the optical coupler U8 is connected to the power supply voltage VCC through the resistor R17, and the emitter is connected to the non-inverting input terminal of the operational amplifier U5 through the inductor L7. The capacitor C32, the capacitor C1 and the resistor R21 are connected in parallel between the non-inverting input terminal of the operational amplifier U5 and the ground;

[0037] The inverting input terminal of the operational amplifier U5 is grounded through a resistor R10, and the inverting input terminal of the operational amplifier U5 is connected to the output terminal of the operational amplifier U5 through a resistor R8; the output terminal of the operational amplifier U5 is connected to the controller through a resistor R12, and capacitors C2 and C4 are connected in parallel between the end of the resistor R12 connected to the controller and the ground.

[0038] Furthermore, the protection circuit includes an electrostatic absorption device D1;

[0039] The electrostatic absorption device D1 is connected in parallel to the secondary side of the isolation transformer T1.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The electrical stimulation pulse control method of the present invention converts the electrical stimulation pulse data generated according to user needs into an analog signal, which is then output after sequential control and amplification. The output pulse analog signal is collected while being output, and the electrical stimulation pulse data generated according to user needs is adjusted according to the output pulse analog signal, forming a closed-loop control mode. The generated electrical stimulation pulse data can be adjusted in real time according to the real-time output of the pulse analog signal, ensuring the accuracy of the output pulse analog signal, so that the same electrical stimulation device can output a pulse analog signal that meets the needs and is highly accurate when used in any scenario. Compared with conventional technologies that adjust the waveform amplitude by adjusting the voltage or amplification factor, which lack reliable feedback control, the present invention uses an isolated feedback signal to form a complete feedback control method, which can make the output pulse more stable and controllable.

[0042] 2. In the present invention, when amplifying the amplitude of the pulse analog signal, there are multiple amplification methods, which can be selected according to actual needs, thereby improving the practicality of the control method of the present invention.

[0043] 3. The electrical stimulation pulse control system of the present invention can implement the above-mentioned control method and has all the advantages of the above-mentioned control method. Through the hardware corresponding to the steps of pulse generation, timing control, amplitude amplification, isolated output, feedback control, etc., the pulse parameters can be accurately controlled.

[0044] 4. This invention utilizes a digital-to-analog conversion module to generate electrical stimulation pulse waveforms. Unlike conventional technologies, which can only generate specific waveforms, this technology can generate arbitrary waveforms based on user-entered digital information. By adjusting the waveform amplitude by adjusting the voltage or amplification factor, the digital-to-analog conversion module can directly output an amplitude-adjustable waveform, achieving higher amplitude control precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a connection diagram of an embodiment of the electrical stimulation pulse control system of the present invention;

[0046] Figure 2 This is a schematic diagram showing the connection between the controller and the digital-to-analog conversion module in an embodiment of the electrical stimulation pulse control system of the present invention;

[0047] Figure 3 This is a circuit diagram of a timing control module and an amplifier circuit in an embodiment of an electrical stimulation pulse control system of the present invention;

[0048] Figure 4 This is a circuit diagram of an isolation circuit, a protection circuit, and an output module in an embodiment of an electrical stimulation pulse control system of the present invention;

[0049] Figure 5 Schematic diagram of the feedback circuit in the embodiment of the electrical stimulation pulse control system of the present invention.

[0050] Among them: 1-controller, 2-digital-analog conversion module, 3-timing control module, 4-amplification circuit, 5-isolation circuit, 6-protection circuit, 7-output module, 8-feedback circuit. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] Low-frequency electrotherapy is a commonly used physical therapy method that uses the physiological effects of specific pulsed currents flowing through the body to treat illnesses. Precise control of pulse parameters plays a crucial role in determining the effectiveness of these treatments.

[0053] The present invention proposes an electrical stimulation pulse control method, which converts electrical stimulation pulse data generated according to user needs into a pulse analog signal corresponding to pulse parameters, controls the continuous output time and pause output time of the pulse in the pulse analog signal according to user needs, amplifies the amplitude of the pulse analog signal, and outputs the pulse analog signal. At the same time, the output pulse analog signal is collected, and the electrical stimulation pulse data generated according to user needs is adjusted according to the amplitude information of the output pulse analog signal, and feedback is performed so that the generated electrical stimulation pulse data is adjusted in real time according to the feedback, and the electrical stimulation pulse is continuously controlled, so that the required electrical stimulation pulse can be continuously output.

[0054] In order to realize the above-mentioned electrical stimulation pulse control method, the present invention provides an electrical stimulation pulse control system, such as Figure 1 As shown, a specific embodiment of the electrical stimulation pulse control system of the present invention includes a feedback circuit 8, and a controller 1, a digital-to-analog conversion module 2, a timing control module 3, an amplifying circuit 4, an isolation circuit 5, a protection circuit 6 and an output module 7 connected in sequence.

[0055] Controller 1 is a functional unit that generates electrical stimulation pulse data based on user needs. Its basic functions include communicating with digital-to-analog conversion module 2 via a data interface, and communicating with feedback circuit 8 via a data interface. In actual circuit applications, additional functions such as a user operation interface, logic control functions, and data storage functions may also be provided. Its specific implementation can be a system-on-chip (SOC) or dedicated computing chip with logic and computing functions, or a general-purpose computer system.

[0056] The digital-to-analog conversion module 2 is a functional unit that converts the electrical stimulation pulse data output by the controller 1 according to user needs into an analog signal. The pulse parameters output by the digital-to-analog conversion module 2 are consistent with the user's needs. Among the pulse parameters output by the digital-to-analog conversion module 2, parameters such as pulse waveform, frequency and duty cycle should be equal to the user set values ​​received by the controller 1, and the pulse amplitude is proportional to the user's needs.

[0057] Timing Control Module 3 is a circuit that controls the timing of electrical stimulation pulse output according to user needs. In practical applications of electrical stimulation pulse therapy devices, pulses are typically output intermittently, with pulses being output continuously for a period of time (duration) followed by a pause for a period of time (rest time). Timing Control Module 3 is the circuit unit that implements this control of duration and rest time.

[0058] The amplifier circuit 4 is a circuit unit for amplifying the amplitude of the electrical stimulation pulse generated above. Its specific implementation includes voltage amplification, current amplification, power amplification or any combination thereof.

[0059] The isolation circuit 5 is a circuit unit added to isolate the circuit from the electrical system of the device. In specific implementation, it can adopt a transformer, a photoelectric coupler or other forms of energy isolation circuit.

[0060] The protection circuit 6 is designed to improve the reliability of the device. It is mainly used for electrostatic protection to prevent the static electricity on the user from damaging the device.

[0061] The output module 7 is used to output electrical stimulation pulses to the user's body. Its typical implementation method is to directly use electrode sheets or connect electrode sheets through a switching circuit.

[0062] The feedback circuit 8 is a functional unit that samples from the pulse output terminal and feeds back the signal related to the output pulse to the controller 1 to complete closed-loop control so that the controller 1 can generate a better waveform.

[0063] The following is a specific implementation of the electrical stimulation pulse control system of the present invention:

[0064] like Figure 2 As shown, the controller 1 adopts a monolithic integrated system-on-chip SOC chip U1, which integrates a CPU, a storage unit, a digital input and output interface, an analog input and output interface and a variety of peripheral modules. U1 can realize all the functions of the controller 1, including user operation input, feedback signal acquisition and pulse data output. The digital-to-analog conversion module 2 can adopt the existing digital-to-analog converter U2, whose maximum output voltage is 3V, the minimum output voltage is 0V, the resolution is 12 bits, and the output signal resolution is about 0.7324mV. The digital-to-analog conversion module 2 converts the digital signal input from the controller 1 into the corresponding pulse signal PULSE_GEN, and PULSE_FB is the feedback signal sent to the controller 1 by the feedback circuit 8. In other embodiments of the present invention, the digital-to-analog conversion module 2 can also use PWM, PFM, digital frequency synthesizer, or any other circuit method that can realize the conversion of digital signals into analog signals.

[0065] like Figure 3The timing control module 3 is composed of a MOS transistor Q5, a resistor R60, a resistor R62, and a resistor R113. One end of the resistor R62 is connected to the external control signal, and the other end is connected to the gate (port 1) of the MOS transistor Q5. One end of the resistor R113 is connected to a first constant voltage, which is set to 3.3V, and the other end is connected between the resistor R62 and the external control signal. One end of the resistor R60 is connected to the drain (port 3) of the MOS transistor Q5, and the other end is connected to the output end of the digital-to-analog conversion module 2. The source (port 2) of the MOS transistor Q5 is grounded. The MOS transistor Q5 uses a small-signal MOSFET model 2N7002, and R60 uses a 100R resistor. When the CTRL signal is high, Q5 is turned on, and the pulse signal PULSE_GEN output by the digital-to-analog conversion module 2 is connected to the reference ground through resistor R60 and Q5. By adjusting the parameters of R60, the amplitude of PULSE_GEN input to the amplifier circuit 4 can be set to zero. When the CTRL signal is low, Q5 is turned off, and PULSE_GEN is directly input to the amplifier circuit 4 without any amplitude loss. In other embodiments of the present invention, the timing control module 3 can also use other methods to implement timing control, such as controlling the operating state of the digital-to-analog conversion module 2 through software logic to achieve the purpose of controlling the output signal, or other timing control module forms.

[0066] Amplifier circuit 4 includes resistor R11, op amp U9, and op amp U7. The non-inverting input of op amp U9 is connected to the adjustment terminal of adjustable resistor R13, which is connected between the other end of resistor R60 and ground. Resistor R18 is provided between the inverting input of op amp U9 and ground. The end of resistor R18 connected to the inverting input of op amp U9 is also connected to the output of op amp U9. The non-inverting input of op amp U7 and the output of op amp U9 are connected via capacitor C41 and polarized capacitor E3. The positive electrode of polarized capacitor E3 is connected to the non-inverting input of op amp U7. The inverting input of op amp U7 is connected to the positive electrode of polarized capacitor E1, the negative electrode of polarized capacitor E1 is connected to the ground op amp via resistor R16. One end of resistor R11 is connected to the negative electrode of polarized capacitor E1, and the other end is connected to the op amp and isolation circuit 5. Amplifier circuit 4 is composed of a two-stage amplifier unit with op amp U9 and op amp U7 as its core. Op amp U9 can enhance the driving capability of the PULSE_GEN signal without any amplitude amplification. Capacitor C41 is used to isolate the DC component in the output signal of op amp U9, and op amp U7 is used to complete the signal amplitude amplification. By adjusting the resistance values ​​of resistors R11 and R16, the amplification factor of amplifier circuit 4 can be changed. The pulse signal PULSE_GEN is input to amplifier circuit 4 through adjustable resistor R13. By adjusting the resistance value of adjustable resistor R13, the input and output amplitude ranges of amplifier circuit 4 can be changed, thereby improving the flexibility of amplifier circuit 4. Op amp U9, as the core component of the first-stage amplifier circuit, has a voltage amplification factor of 1. In the second-stage amplifier circuit, resistors R11 and R16 are 330R and 65R, respectively, and the voltage amplification factor is set to 5 times. In other embodiments of the present invention, amplifier circuit 4 can also adopt other circuits with adjustable amplification factors. In addition, the adjustment of the amplification factor can also be achieved through feedback signals and control devices.

[0067] like Figure 4As shown, the isolation circuit 5 primarily includes an isolation transformer T1. The primary side of the isolation transformer T1 is connected in parallel with capacitor C30 and polarized capacitor E5. The negative electrode of polarized capacitor E5 is grounded via resistor R20. The positive electrode of polarized capacitor E5 is connected to the negative electrode of polarized capacitor E2, which is then connected to the output of op amp U7. The secondary side of the isolation transformer T1 is connected to the protection circuit 6, with the other end of resistor R11 connected to the negative electrode of polarized capacitor E5. In a specific implementation, the output voltage and output current can be adjusted by adjusting the turns ratio of the primary and secondary windings of the isolation transformer T1. In this embodiment, the turns ratio of the primary and secondary windings of the isolation transformer T1 is 1:6. While providing electrical isolation, it also converts the output pulse voltage, resulting in an output voltage that is six times the input voltage and an output current that is one-sixth the input current. The protection circuit 6 primarily comprises an electrostatic absorption device D1, which is connected in parallel to the secondary side of the isolation transformer T1 to protect the system from damage caused by static electricity carried by the user's body. The electrostatic absorption device D1 is connected in parallel to the secondary side of the isolation transformer T1. Static absorption device D1 uses a bidirectional TVS diode. When static electricity from the human body is transmitted to the system through the electrode sheet, it can be quickly discharged through the TVS diode. Output circuit 7 is the output terminal of the electrical stimulation pulse. It includes a P terminal and an N terminal. The P and N terminals can be directly connected to the two electrode sheets and can be attached to the corresponding positions according to the user's needs.

[0068] like Figure 5The feedback circuit 8 includes an operational amplifier U5 and an optocoupler U8. The positive input terminal of the optocoupler U8 is connected to the secondary side of the isolation transformer T1 through a resistor R15, and the negative input terminal is connected to the secondary side of the isolation transformer T1 through a diode D6. The positive electrode of the diode D6 is connected to the negative input terminal of the optocoupler U8. The collector of the optocoupler U8 is connected to the power supply voltage VCC through a resistor R17, and the emitter is connected to the non-inverting input terminal of the operational amplifier U5 through an inductor L7. A capacitor C32, a capacitor C1 and a resistor R21 are connected in parallel between the non-inverting input terminal of the operational amplifier U5 and the ground. The inverting input terminal of the operational amplifier U5 is grounded through a resistor R10. At the same time, the inverting input terminal of the operational amplifier U5 is connected to the output terminal of the operational amplifier U5 through a resistor R8; the output terminal of the operational amplifier U5 is connected to the controller 1 through a resistor R12, and a capacitor C2 and a capacitor C4 are connected in parallel between the end of the resistor R12 connected to the controller 1 and the ground. The feedback circuit 8 finally outputs a feedback signal PULSE_FB of 0-3V through the current transformation ratio of the optocoupler U8 and the amplification of the amplifier circuit with the operational amplifier U5 as the core component. The optocoupler U8 can also be other sampling devices with isolation function. By adjusting the resistance values ​​of resistors R8 and R10, the ratio of the output signal of the feedback circuit 8 to the output signal of the entire system can be adjusted. The controller 1 can calculate the amplitude of the current output signal by collecting and measuring the amplitude of the feedback signal PULSE_FB, and then adjust it according to the current target amplitude value to complete closed-loop control. In other embodiments of the present invention, the feedback circuit 8 can also adopt other forms, including isolation and non-isolation methods, isolation methods such as transformer auxiliary winding sampling, current transformer sampling, magnetic coupler sampling, etc., and non-isolation methods such as direct sampling of sampling resistors, etc.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electrical stimulation pulse control system, characterized in that: It includes a feedback circuit (8), and a controller (1), a digital-to-analog conversion module (2), a timing control module (3), an amplifying circuit (4), an isolation circuit (5), and an output module (7) connected in sequence; The digital-to-analog conversion module (2) is used to convert the electrical stimulation pulse data generated according to user needs into a pulse analog signal; The timing control module (3) is used to control the continuous output time and the continuous pause time of the pulse in the pulse simulation signal; The amplifier circuit (4) is used to amplify the amplitude of the pulse analog signal; The isolation circuit (5) is used to electrically isolate the pulse analog signal; The output module (7) is used to output the amplified pulse analog signal; The feedback circuit (8) is connected between the isolation circuit (5) and the controller (1); The amplifier circuit (4) includes a resistor R11, an operational amplifier U9 and an operational amplifier U7; The non-inverting input terminal of the operational amplifier U9 is connected to the adjustment terminal of the adjustable resistor R13, and the adjustable resistor R13 is connected between the other end of the resistor R60 and the ground; a resistor R18 is provided between the inverting input terminal of the operational amplifier U9 and the ground, and the end of the resistor R18 connected to the inverting input terminal of the operational amplifier U9 is also connected to the output terminal of the operational amplifier U9; The non-inverting input terminal of the operational amplifier U7 is connected to the output terminal of the operational amplifier U9 via a capacitor C41 and a polar capacitor E3, and the positive electrode of the polar capacitor E3 is connected to the non-inverting input terminal of the operational amplifier U7; the inverting input terminal of the operational amplifier U7 is connected to the positive electrode of the polar capacitor E1, and the negative electrode of the polar capacitor E1 is grounded to the operational amplifier via a resistor R16; The isolation circuit (5) includes an isolation transformer T1; The primary side of the isolation transformer T1 is connected in parallel with a capacitor C30 and a polar capacitor E5, the negative electrode of the polar capacitor E5 is grounded through a resistor R20, the positive electrode of the polar capacitor E5 is connected to the negative electrode of the polar capacitor E2, and the positive electrode of the polar capacitor E2 is connected to the output terminal of the operational amplifier U7; The secondary side of the isolation transformer T1 is connected to a protection circuit (6); One end of the resistor R11 is connected to the negative electrode of the polar capacitor E1, and the other end is connected to the negative electrode of the polar capacitor E5; The feedback circuit (8) includes an operational amplifier U5 and an optical coupler U8; The positive electrode of the input end of the optical coupler U8 is connected to the secondary side of the isolation transformer T1 through the resistor R15, and the negative electrode of the input end is connected to the secondary side of the isolation transformer T1 through the diode D6, and the positive electrode of the diode D6 is connected to the negative electrode of the input end of the optical coupler U8; The collector of the optical coupler U8 is connected to the power supply voltage VCC through the resistor R17, and the emitter is connected to the non-inverting input terminal of the operational amplifier U5 through the inductor L7. The capacitor C32, the capacitor C1 and the resistor R21 are connected in parallel between the non-inverting input terminal of the operational amplifier U5 and the ground; The inverting input terminal of the operational amplifier U5 is grounded via a resistor R10, and the inverting input terminal of the operational amplifier U5 is connected to the output terminal of the operational amplifier U5 via a resistor R8; the output terminal of the operational amplifier U5 is connected to the controller (1) via a resistor R12, and a capacitor C2 and a capacitor C4 are connected in parallel between the end of the resistor R12 connected to the controller (1) and the ground.

2. The electrical stimulation pulse control system according to claim 1, wherein: It also includes a protection circuit (6) connected between the isolation circuit (5) and the output module (7) for preventing static electricity on the user from damaging the control system.

3. The electrical stimulation pulse control system according to claim 2, wherein: The timing control module (3) comprises a MOS tube Q5, a resistor R60, a resistor R62 and a resistor R113; One end of the resistor R62 is connected to the external control signal, and the other end is connected to the gate of the MOS transistor Q5; One end of the resistor R113 is connected to the first constant voltage, and the other end is connected to the resistor R62 and an external control signal; One end of the resistor R60 is connected to the drain of the MOS tube Q5, and the other end is connected to the output end of the digital-to-analog conversion module (2); The source of the MOS transistor Q5 is grounded.

4. The electrical stimulation pulse control system according to claim 3, wherein: The protection circuit (6) includes an electrostatic absorption device D1; The electrostatic absorption device D1 is connected in parallel to the secondary side of the isolation transformer T1.

5. The electrical stimulation pulse control system according to claim 1, characterized in that: The electric stimulation pulse control method of the electric stimulation pulse control system comprises the following steps: S1, converting the electrical stimulation pulse data generated according to user needs into a pulse analog signal corresponding to the pulse parameters; S2, controlling the continuous output time and pause output time of the pulse in the pulse analog signal according to user needs; S3, after amplifying the amplitude of the pulse analog signal, output the pulse analog signal; at the same time, collecting the output pulse analog signal, and adjusting the electrical stimulation pulse data generated according to user needs in step S1 according to the amplitude information of the output pulse analog signal; S4, repeatedly executing steps S1 to S3, and continuously controlling the electrical stimulation pulses so that the electrical stimulation pulses meet the needs of the user.

6. The electrical stimulation pulse control system according to claim 5, characterized in that: In step S1, the pulse parameters include pulse waveform, frequency, duty cycle and pulse amplitude; and the pulse amplitude of the pulse simulation signal is proportional to the amplitude of the electrical stimulation pulse data generated according to user needs.

7. The electrical stimulation pulse control system according to claim 6, characterized in that: In step S3, amplifying the amplitude of the pulse analog signal specifically includes amplifying the amplitude of the pulse analog signal by sequentially performing one of voltage amplification, current amplification, and power amplification or any combination thereof.

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