High-voltage neuromuscular electrical stimulation equipment output control circuit capable of adapting to different loads

Abstract

The utility model provides a high-voltage neuromuscular electrical stimulation equipment output control circuit capable of adapting to different loads. The high-voltage neuromuscular electrical stimulation equipment output control circuit comprises a system power supply module, an on-off control module, a microprocessor, a boost control module, a constant current control module and an electrical stimulation output control module, the system power supply module is electrically connected with the microprocessor through the on-off control module, the on-off control module is electrically connected with the boost control module, the boost control module is electrically connected with the microprocessor, a load is arranged between the boost control module and the constant current control module, and the constant current control module is electrically connected with the electrical stimulation output control module. The constant current control module is electrically connected with the microprocessor, and the electrical stimulation output control module is electrically connected with the microprocessor; according to the high-voltage neuromuscular electrical stimulation equipment output control circuit capable of adapting to different loads, the electrical stimulation voltage can be automatically adjusted when the loads change, the electrical stimulation output pulse amplitude can exceed 100V, and the high-voltage neuromuscular electrical stimulation equipment output control circuit can adapt to impedance changes of different stimulation parts.

Description

Technical Field

[0001] The utility model belongs to the technical field of control circuits of neuromuscular electrical stimulation equipment, and in particular relates to an output control circuit of a high-voltage neuromuscular electrical stimulation equipment that can adapt to different loads. Background Art

[0002] Neuromuscular electrical stimulation devices mainly stimulate the common peroneal nerve to speed up the work of the calf muscle pump, thereby accelerating blood circulation and increasing blood flow. Most of the devices currently on the market cannot adapt to different loads. When the load impedance changes due to individual differences and differences in stimulation sites, the device cannot automatically adjust, resulting in unsatisfactory stimulation effects. At the same time, the stimulation voltage is low and cannot output stimulation pulses with a pulse amplitude exceeding 100V. For people with high personal tolerance, the stimulation effect is not ideal. Summary of the invention

[0003] The purpose of the utility model is to provide a high-voltage neuromuscular electrical stimulation device output control circuit that can adapt to different loads, so as to solve the technical problem that the neuromuscular electrical stimulation device cannot adapt to different loads and cannot achieve high voltage output.

[0004] To achieve the above-mentioned purpose, the utility model provides an output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads, including a system power supply module, a power on / off control module, a microprocessor, a boost control module, a constant current control module, and an electrical stimulation output control module; the system power supply module is electrically connected to the microprocessor through the power on / off control module, the shutdown control module is electrically connected to the boost control module, the boost control module is electrically connected to the microprocessor, a load is arranged between the boost control module and the constant current control module, the constant current control module is electrically connected to the electrical stimulation output control module, the constant current control module is electrically connected to the microprocessor, and the electrical stimulation output control module is electrically connected to the microprocessor.

[0005] Furthermore, the output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads also includes a lithium battery module, a charging management module, and a USB interface circuit module. The USB interface circuit module is electrically connected to the charging management module, the charging management module is electrically connected to the lithium battery module, and the charging management module is electrically connected to the microprocessor.

[0006] Further, the circuit of the boost control module includes an inductor L1, a diode D1, an NPN transistor Q2, a capacitor C5, a resistor R25, and a resistor R26, one end of the inductor L1 is electrically connected to the VCC SYS power supply end, the other end of the inductor L1 is electrically connected to the collector of the NPN transistor Q2, one end of the resistor R25 is electrically connected to the control end AMP_BOOST_PWM_CTR of the microprocessor, the other end of the resistor R25 is electrically connected to the base of the NPN transistor Q2, the resistor R26 is arranged between the base of the NPN transistor Q2 and the ground end, the emitter of the NPN transistor Q2 is electrically connected to the ground end, the positive terminal of the diode D1 is electrically connected to the other end of the inductor L1, the negative terminal of the diode D1 is the circuit output end AMP 0UTA, and the capacitor C5 is arranged between the circuit output end AMP 0UTA and the ground end.

[0007] Furthermore, the circuit of the constant current control module includes a resistor R29 and a transistor Q4, and the circuit of the electrical stimulation output control module includes a resistor R48, a resistor R47, and a transistor Q5. The collector of the transistor Q4 is the circuit output terminal AMP0UTB, the base of the transistor Q4 is electrically connected to the microprocessor control terminal DAC_AMP_CURRENT_CTR through the resistor R29, the emitter of the transistor Q4 is electrically connected to the collector of the transistor Q5, the base of the transistor Q5 is electrically connected to the microprocessor control terminal AMP_OUT_CTR through the resistor R48, the collector of the transistor Q5 is electrically connected to the ground terminal, and the resistor R47 is arranged between the base of the transistor Q3 and the emitter of the transistor Q5.

[0008] The advantages of the utility model are: the utility model provides an output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads. Through a constant current control module, the electrical stimulation voltage can be automatically adjusted when the load changes. Through a boost control module, the electrical stimulation output pulse amplitude can exceed 100V, so that the output control circuit of the high-voltage neuromuscular electrical stimulation device that can adapt to different loads can adapt to the impedance changes of different stimulation parts, and the stimulation effect can meet the needs of people with different needs. At the same time, the stimulation voltage can be adjusted, and a stimulation pulse with a pulse amplitude exceeding 100 can be output. For people with higher personal tolerance, the stimulation effect can also meet the needs.

[0009] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The invention is a schematic diagram of an output control circuit of a high voltage neuromuscular electrical stimulation device which can adapt to different loads.

[0011] Figure 2This is a circuit diagram of the USB interface circuit module.

[0012] Figure 3 This is the circuit diagram of the charging management module.

[0013] Figure 4 It is the circuit diagram of the system power module.

[0014] Figure 5 This is the circuit diagram of the power on / off control module.

[0015] Figure 6 It is the schematic diagram of the boost control module circuit.

[0016] Figure 7 It is a circuit diagram of a constant current control module and an electrical stimulation output control module. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0021] Example 1

[0022] In order to solve the technical problem that neuromuscular electrical stimulation equipment cannot adapt to different loads and cannot achieve high voltage output.

[0023] To achieve the above purpose, this embodiment provides Figure 1 to Figure 7 The output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads is shown, including a system power module, a power on / off control module, a microprocessor, a boost control module, a constant current control module, and an electrical stimulation output control module; the system power module is electrically connected to the microprocessor through the power on / off control module, the shutdown control module is electrically connected to the boost control module, the boost control module is electrically connected to the microprocessor, a load is arranged between the boost control module and the constant current control module, the constant current control module is electrically connected to the electrical stimulation output control module, the constant current control module is electrically connected to the microprocessor, and the electrical stimulation output control module is electrically connected to the microprocessor; the system power module converts the power of the lithium battery module into the DC2.5V required for the operation of the microprocessor, the power on / off control module mainly controls the power on and off of the device through buttons, and the microprocessor includes the microprocessor and its associated circuits. It is mainly responsible for the implementation of relevant control logic of neuromuscular electrical stimulation equipment, analysis and processing of input signals / data of each module, and control of output of each module. The boost control module mainly controls the BOOST circuit through a microprocessor to boost the DC3.7V of the lithium battery to above DC150V. The constant current control module mainly controls the base current of the NPN transistor through a microprocessor to achieve constant current control of electrical stimulation output. The electrical stimulation output control module mainly controls the on-off of the NMOS tube through a microprocessor, thereby controlling the base current of the NPN transistor of the constant current control module to achieve control of the electrical stimulation output.

[0024] Furthermore, the model of the microprocessor is: STM32L151C8T6A.

[0025] Furthermore, the output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads also includes a lithium battery module, a charging management module, and a USB interface circuit module. The USB interface circuit module is connected to an external USB charger to charge the internal lithium battery. The charging management module mainly manages the charging of the internal lithium battery to achieve constant current charging and constant voltage charging of the lithium battery, and indicates the battery charging status: charging, fully charged, and the lithium battery module mainly supplies power to the device; the USB interface circuit module is electrically connected to the charging management module, the charging management module is electrically connected to the lithium battery module, and the charging management module is electrically connected to the microprocessor.

[0026] Further, such as Figure 2As shown in the figure, the USB interface circuit module is explained as follows: the DC5V of the external charger is connected to the device through the TYPE_C interface, and TVS1, C1, FB1, and FB2 are all protection devices.

[0027] Further, such as Figure 3 As shown in the figure, the charging management module is described as follows: through U3, the battery charging management and charging indication can be realized.

[0028] When the external power supply is connected, the CHARG_STATE port will be pulled low, and the charging indicator light will be on, indicating that the device is charging;

[0029] When the battery is fully charged, the CHARG_STATE port will become a high-impedance state, turning off the charging indicator light, indicating that the device battery is fully charged.

[0030] Further, such as Figure 4 As shown in the figure, the system power module is described as follows: the DC3.7V of the internal lithium battery is converted into the DC2.5V required for system operation through the linear voltage conversion chip U5.

[0031] Further, such as Figure 5 As shown in the figure, the circuit principle of the power on / off control module is described as follows:

[0032] 1) In the shutdown state, the SYS_PWR_KEY_SIG and SYS_PWR_CTR signals are both low level. When the power button is pressed, SYS_PWR_KEY_SIG is pulled high, Q3 is turned on, and then Q1 is turned on, VBAT and VCC_POWER are turned on, and the system is powered on. After the microprocessor starts, when it detects that the SYS_PWR_KEY_SIG pull-up time meets the boot conditions, the SYS_PWR_CTR signal is pulled high to lock the boot state. When the power button is released, SYS_PWR_KEY_SIG returns to a low level and the boot is completed.

[0033] 2) When the power button is pressed in the power-on state, SYS_PWR_KEY_SIG is pulled high. When the microprocessor detects that the shutdown conditions are met, the microprocessor pulls the SYS_PWR_CTR signal low and the system enters the shutdown process. When the power button is released, SYS_PWR_KEY_SIG returns to a low level, turning off Q3 and then Q1, disconnecting VBAT from VCC_POWER, and the system loses power, completing the shutdown.

[0034] Further, such as Figure 6As shown, the circuit of the boost control module includes an inductor L1, a diode D1, an NPN transistor Q2, a capacitor C5, a resistor R25, and a resistor R26. One end of the inductor L1 is electrically connected to the VCC SYS power supply end, the other end of the inductor L1 is electrically connected to the collector of the NPN transistor Q2, one end of the resistor R25 is electrically connected to the control end AMP_BOOST_PWM_CTR of the microprocessor, the other end of the resistor R25 is electrically connected to the base of the NPN transistor Q2, the resistor R26 is arranged between the base of the NPN transistor Q2 and the ground end, the emitter of the NPN transistor Q2 is electrically connected to the ground end, the positive terminal of the diode D1 is electrically connected to the other end of the inductor L1, the negative terminal of the diode D1 is the circuit output end AMP 0UTA, and the capacitor C5 is arranged between the circuit output end AMP 0UTA and the ground end.

[0035] Boost control module circuit principle description: The BOOST circuit is composed of inductor L1, diode D1, NPN transistor Q2, and capacitor C5. The microprocessor controls the AMP_BOOST_PWM_CTR signal to output at a certain duty cycle and a certain frequency to achieve boost control, and finally the voltage across C5 can reach more than DC150V.

[0036] Further, such as Figure 7 As shown, the circuit of the constant current control module includes a resistor R29 and a transistor Q4, and the circuit of the electrical stimulation output control module includes a resistor R48, a resistor R47, and a transistor Q5. The collector of the transistor Q4 is the circuit output terminal AMP 0UTB, the base of the transistor Q4 is electrically connected to the microprocessor control terminal DAC_AMP_CURRENT_CTR through the resistor R29, the emitter of the transistor Q4 is electrically connected to the collector of the transistor Q5, the base of the transistor Q5 is electrically connected to the microprocessor control terminal AMP_OUT_CTR through the resistor R48, the collector of the transistor Q5 is electrically connected to the ground terminal, and the resistor R47 is arranged between the base of the transistor Q3 and the emitter of the transistor Q5.

[0037] Circuit principle description of constant current control module and electrical stimulation output control module:

[0038] Constant current control circuit: This circuit controls the DAC_AMP_CURRENT_CTR signal through the microcontroller, and then controls the base current of Q4 to achieve control of the collector current of Q4. When the DAC_AMP_CURRENT_CTR signal is constant, the collector current of Q4 is constant, which is the electrical stimulation output current;

[0039] Electrical stimulation output control circuit: This circuit controls the AMP_OUT_CTR signal through the microcontroller. When the AMP_OUT_CTR signal is high, Q5 is turned on and the electrical stimulation output is turned on; when the AMP_OUT_CTR signal is low, Q5 is turned off and the electrical stimulation output is turned off.

[0040] In actual application, the load is set between the circuit output terminal AMP 0UTA and the circuit output terminal AMP 0UTB, and the high-voltage neuromuscular electrical stimulation device output control system that can adapt to different loads can be started through the power on / off control module. The microprocessor can work to control the constant current control module and the electrical stimulation output control module, thereby automatically adjusting the electrical stimulation voltage to meet the stimulation effect.

[0041] To sum up, the utility model provides an output control circuit of a high-voltage neuromuscular electrical stimulation device that can adapt to different loads. Through the constant current control module, the electrical stimulation voltage can be automatically adjusted when the load changes. Through the boost control module, the electrical stimulation output pulse amplitude can exceed 100V. As a result, the output control circuit of the high-voltage neuromuscular electrical stimulation device that can adapt to different loads can adapt to the impedance changes of different stimulation parts, and the stimulation effect can meet the needs of people with different needs. At the same time, the stimulation voltage can be adjusted, and a stimulation pulse with a pulse amplitude exceeding 100 can be output. For people with higher personal tolerance, the stimulation effect can also meet the needs of people.

[0042] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A high voltage neuromuscular electrical stimulation device output control circuit that can adapt to different loads, characterized in that: It includes a system power module, a power on / off control module, a microprocessor, a boost control module, a constant current control module, and an electrical stimulation output control module; the system power module is electrically connected to the microprocessor through the power on / off control module, the shutdown control module is electrically connected to the boost control module, the boost control module is electrically connected to the microprocessor, a load is arranged between the boost control module and the constant current control module, the constant current control module is electrically connected to the electrical stimulation output control module, the constant current control module is electrically connected to the microprocessor, and the electrical stimulation output control module is electrically connected to the microprocessor.

2. A high voltage neuromuscular electrical stimulation device output control circuit capable of adapting to different loads as claimed in claim 1, characterized in that: It also includes a lithium battery module, a charging management module, and a USB interface circuit module. The USB interface circuit module is electrically connected to the charging management module, the charging management module is electrically connected to the lithium battery module, and the charging management module is electrically connected to the microprocessor.

3. A high voltage neuromuscular electrical stimulation device output control circuit capable of adapting to different loads as claimed in claim 1, characterized in that: The circuit of the boost control module includes an inductor L1, a diode D1, an NPN transistor Q2, a capacitor C5, a resistor R25, and a resistor R26. One end of the inductor L1 is electrically connected to the VCC SYS power supply end, the other end of the inductor L1 is electrically connected to the collector of the NPN transistor Q2, one end of the resistor R25 is electrically connected to the control end AMP_BOOST_PWM_CTR of the microprocessor, the other end of the resistor R25 is electrically connected to the base of the NPN transistor Q2, the resistor R26 is arranged between the base of the NPN transistor Q2 and the ground end, the emitter of the NPN transistor Q2 is electrically connected to the ground end, the positive terminal of the diode D1 is electrically connected to the other end of the inductor L1, the negative terminal of the diode D1 is the circuit output end AMP 0UTA, and the capacitor C5 is arranged between the circuit output end AMP 0UTA and the ground end.

4. A high voltage neuromuscular electrical stimulation device output control circuit capable of adapting to different loads as claimed in claim 1, characterized in that: The circuit of the constant current control module includes a resistor R29 and a transistor Q4, and the circuit of the electrical stimulation output control module includes a resistor R48, a resistor R47, and a transistor Q5. The collector of the transistor Q4 is the circuit output terminal AMP0UTB, the base of the transistor Q4 is electrically connected to the microprocessor control terminal DAC_AMP_CURRENT_CTR through the resistor R29, the emitter of the transistor Q4 is electrically connected to the collector of the transistor Q5, the base of the transistor Q5 is electrically connected to the microprocessor control terminal AMP_OUT_CTR through the resistor R48, the collector of the transistor Q5 is electrically connected to the ground terminal, and the resistor R47 is arranged between the base of the transistor Q3 and the emitter of the transistor Q5.

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