Arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and multiple scenes

Abstract

The invention discloses a multi-field and multi-scene-oriented arbitrary multi-frequency pseudo-random signal electrical stimulation device, which is characterized in that the device provides a signal generation module, a signal receiving module, a signal amplification module, a signal output module, a power supply module and the like which are connected in sequence. The multi-frequency pseudo-random signal used by the device integrates the advantages of low-order and high-order pseudo-random signals, is wide in frequency coverage, can flexibly customize and switch the low-order and high-order pseudo-random signals, is realized through specific coding, is high in practical operability, can accurately match the inherent frequency range of a target area in different application scenes, and is high in practicability. And multi-frequency combined signals are selected as required to realize synchronous stimulation. No matter in the fields of rehabilitation physiotherapy, tissue function adjustment, special biological effect regulation and control and the like, the device can adapt to differences of different groups and individuals, the personalized stimulation requirements of diversified scenes are met, and the adaptation range is far beyond that of a traditional single-field device.

Description

Technical Field

[0001] This invention relates to electrical stimulation technology, specifically an arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios. Background Technology

[0002] Bioelectric stimulation technology is a process that uses controlled current and time to stimulate the body's nerves, muscles, and other tissues to promote natural healing mechanisms, while also relieving pain, restoring bodily functions, and improving quality of life.

[0003] Currently, commonly used electrical stimulation types are categorized into analgesic electrical stimulation, functional electrical stimulation, rehabilitation electrical stimulation, central nervous system modulation techniques, and repair electrical stimulation. Commonly used electrical stimulation waveforms include conventional rectangular waves, sine waves, and trapezoidal waves. Among these, rectangular waves are the most widely used electrical stimulation signal due to their simplicity and ease of precise control over stimulation time and intensity, often used for neuromuscular electrical stimulation, but they suffer from significant energy attenuation. Sine waves can simulate some natural electrical signal changes within the body and are suitable for electrophysiological studies, but their generation method is relatively complex. Trapezoidal wave signals can maintain a constant stimulation state at the stimulation site, but they cannot achieve precise control of stimulation accuracy. While the waveform generation methods used in these electrical stimulation methods are simple and easy to implement, and are widely used, commonly used electrical stimulation waveforms have fixed and singular frequencies, significant energy attenuation, and can only stimulate sites that conform to a fixed frequency. Furthermore, changing the frequency of the electrical stimulation waveform is difficult. Based on a... n The a-type neuromuscular electrical stimulation system using pseudo-random signals n The frequency of pseudo-random signals differs from that of commonly used electrical stimulation signals, and a n The generation method of pseudo-random signals is relatively complex, a n The pseudo-random signal is a bidirectional symmetrical signal, and the energy a attenuation of the commonly used electrical stimulation signal is... n Pseudo-random signals can effectively supplement this, but a n Once the frequency 'a' and order 'n' of a pseudo-random signal are selected, they cannot be changed. Therefore, it's impossible to set a specific electrical stimulation frequency when stimulating a particular population. Furthermore, conventional electrical stimulation systems and those based on 'a'... n Pseudo-random signal-based neuromuscular electrical stimulation systems cannot guarantee the confidentiality of the stimulation signals used, nor can they effectively stimulate specific populations. The high-order pseudo-random signal frequency generation method used in electrical stimulation devices, compared to conventional electrical stimulation and those based on a... nWhile pseudo-random signal electrical stimulation is more complex, the frequency of high-order pseudo-random signals can be set autonomously. The signal frequency can be set to any desired frequency. The high-order pseudo-random signals used are implemented using specific coding programming, and the implemented high-order pseudo-random signals can be predetermined. However, high-order pseudo-random signal electrical stimulation devices cannot output both low-order and high-order pseudo-random signals simultaneously. In contrast, multi-scene electrical stimulation devices based on multi-frequency pseudo-random signals can output both low-order and high-order pseudo-random signals. Furthermore, the stimulation signal encoding of multi-scene electrical stimulation devices based on multi-frequency pseudo-random signals is simpler than that of high-order pseudo-random signals, greatly simplifying hardware circuit design and enhancing current output capability. Multi-scene electrical stimulation devices based on multi-frequency pseudo-random signals can be applied to different scenarios, not limited to neuromuscular electrical stimulation, but also used for other sites requiring stimulation, offering advantages such as adaptability to individual differences and multi-scenario compatibility. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing conventional electrical stimulation and a-based methods. n Addressing the shortcomings of pseudo-random signal electrical stimulation technology and high-order pseudo-random signal technology, this invention provides an arbitrary multi-frequency pseudo-random signal electrical stimulation device applicable to multiple fields and scenarios. This device utilizes both low-order and high-order pseudo-random signals, with different frequency groups of the multi-frequency pseudo-random signals that can be autonomously set. The implementation of multi-frequency pseudo-random signals is simple, allowing for the selection of corresponding stimulation modes according to different scenarios. Stimulation is achieved by combining multi-frequency pseudo-random stimulation electrical signals of different frequencies. Furthermore, it can target specific individuals with multi-frequency pseudo-random signals, achieving multi-frequency synchronous stimulation. Specific frequency groups of signals can be selected and set according to the individual's needs to maximize the therapeutic effect.

[0005] The technical solution to achieve the objective of this invention is:

[0006] An arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios is disclosed. The device comprises a signal generation module, a signal receiving module, a signal amplification module, a signal output module, and a power supply module connected in sequence. The signal generation module generates multi-frequency pseudo-random signals by encoding and encapsulating a multi-frequency pseudo-random signal encoding sequence (different frequency groups), and then programs the corresponding pseudo-random signal code into the microcontroller of the signal receiving module. The signal receiving module has a microcontroller; the multi-frequency pseudo-random signal is encoded by the multi-frequency pseudo-random signal, encapsulated, and then programmed into the microcontroller of the signal receiving module. The first I / O port (TXD) and the second I / O port (RXD) of the microcontroller in the signal receiving module serve as the data ports for receiving the multi-frequency pseudo-random signal. The third I / O port (Signal+) is used for output. The voltage signal carries a multi-frequency pseudo-random signal. The fourth IO port of the microcontroller, Signal+_EN, is the Signal+ enable signal. The fifth IO port of the microcontroller, Signal-, is the inverted Signal+ signal to control the Signal+ signal. The sixth IO port of the microcontroller, Signal-_EN, is the Signal- enable signal. The seventh IO port TX and the eighth IO port RX of the microcontroller are the communication ports of the expansion modules, used for serial communication between the various expansion modules. The ninth IO port EN of the microcontroller is the buzzer enable port. The tenth IO port SCL and the eleventh IO port SDA of the microcontroller are the communication ports of the display screen. The twelfth IO port OUT and the thirteenth IO port IN of the microcontroller are the output and input ports of the one-button power on / off module.

[0007] The signal generation module uses embedded software to write multi-frequency pseudo-random signal sequence code and encapsulates the code to generate multi-frequency pseudo-random signals. The multi-frequency pseudo-random signals written in the embedded software are directly burned into the microcontroller. The microcontroller's TXD and RXD interfaces serve as the communication interfaces for burning the code into the microcontroller.

[0008] The signal receiving module includes a microcontroller circuit, a button control module, and a one-button power on / off circuit. Two different I / O ports, TXD and RXD, are multi-frequency pseudo-random signal code burning communication interfaces. The microcontroller's third I / O port Signal+, fourth I / O port Signal+_EN, fifth I / O port Signal-, and sixth I / O port Signal-_EN are connected to the signal amplification module. The microcontroller's seventh and eighth I / O ports are connected to the expansion module, the ninth I / O port is connected to the buzzer, the tenth and eleventh I / O ports are connected to the display screen, and the twelfth and thirteenth I / O ports are connected to the one-button power on / off circuit.

[0009] The signal amplification module is equipped with an NMOS driver circuit, which is connected to the output of the signal receiving module. Specifically, in the signal amplification circuit, pin 1 of the first NMOS driver chip U2 is connected to the power supply VCC; pin 2 is connected to the Signal+ pin of the microcontroller in the signal receiving module; pin 3 is connected to the Signal+_EN pin of the microcontroller in the signal receiving module; pin 4 is connected to GND; pin 5 is connected to the gate of Q3 in the signal output module; pin 6 is connected to capacitor C1; pin 7 is connected to the gate of Q1 in the signal output module; and pin 8 is connected to the cathode of diode D5. The anode of D5 is connected to VCC, and one end of capacitor C1 is connected to… The cathode of D5 is connected to pin 6 of the first NMOS driver chip. Pin 1 of the second NMOS driver chip U3 in the signal amplification circuit is connected to the power supply VCC. Pin 2 is connected to the Signal- pin in the microcontroller of the signal receiving module. Pin 3 is connected to the Signal-_EN pin in the microcontroller of the signal receiving module. Pin 4 is connected to GND. Pin 5 is connected to the gate of Q4 in the signal output module. Pin 6 is connected to capacitor C2. Pin 7 is connected to the gate of Q2 in the signal output module. Pin 8 is connected to the cathode of diode D6. The anode of D6 is connected to VCC. One end of capacitor C2 is connected to the cathode of D6, and the other end is connected to pin 6 of the second NMOS driver chip.

[0010] The signal output module includes an H-bridge circuit and an output interface. In the signal amplification circuit, the NMOS driver circuit is connected to the gates of signal output circuits Q1, Q2, Q3, and Q4. Specifically, the gate (G) of MOS transistor Q1 is connected to pin 7 of signal amplification module U2, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q3. Similarly, the gate (G) of MOS transistor Q2 is connected to pin 7 of signal amplification module U3, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q4. The gate (G) of MOS transistor Q3 is connected to pin 5 of signal amplification module U2, and its drain (D) is connected to the drain of Q4. 1. The source of MOSFET Q4 is connected to GND. The gate of MOSFET Q4 is connected to pin 5 of signal amplifier module U3. The drain of MOSFET Q4 is connected to the source of MOSFET Q2. The source of MOSFET Q2 is connected to GND. The anode of diode D1 is connected to the source of MOSFET Q1, and the cathode is connected to the drain of MOSFET Q1. The anode of diode D2 is connected to the source of MOSFET Q2, and the cathode is connected to the drain of MOSFET Q2. The anode of diode D3 is connected to the source of MOSFET Q3, and the cathode is connected to the drain of MOSFET Q3. The anode of diode D4 is connected to the source of MOSFET Q4, and the cathode is connected to the drain of MOSFET Q4. One end of resistor R1 is connected to the source of MOSFET Q1, and the other end is connected to the drain of MOSFET Q4.

[0011] The power module includes a boost IC and a buck IC. The buck IC has pin 1 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 3 connected to one end of resistor R2, the other end of R2 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 connected to GND, and pin 8 connected to VCC, supplying power to the microcontroller and NMOS driver chip. The boost IC has pin 1 connected to one end of inductor L1, the other end of inductor L1 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 connected to GND, pin 6 connected to one end of resistor R5, the other end of resistor R5 connected to GND, pin 7 connected to the common point of resistors R3 and R4, and pin 8 connected to VOUT and one end of resistor R3, the other end of resistor R3 connected to one end of resistor R4, and the other end of resistor R4 connected to GND.

[0012] The one-button power on / off circuit consists of two NPN transistors and an independent button. The independent button B1 is connected to the collector C of transistor Q5 and the base B of transistor Q6. The base B of transistor Q5 is connected to the OUT of the microcontroller of the signal receiving module, and the emitter E is connected to GND. The emitter E of transistor Q6 is connected to GND, and the collector C is connected to the positive terminal of the lithium battery BATTERY-3.7V and the IN of the microcontroller.

[0013] The VCC, VOUT, and GND terminals are all connected to the corresponding VCC, VOUT, and GND terminals on the PCB board, and the output interface is connected to the external physiotherapy electrode pad.

[0014] Preferably, the microcontroller U1 is an STM32L05C8T6.

[0015] Preferably, the first NMOS driver chip U2 and the second NMOS driver chip U3 are both IRF2104, the NMOS transistors Q1, Q2, Q3, and Q4 are all 2N7002W, and the diodes D1, D2, D3, D4, D5, and D6 are all 1N4148W.

[0016] Preferably, the step-down IC is AP2112K-3.3, the boost IC is FP6291LR-G1, and both transistors Q5 and Q6 are MMBT3904.

[0017] In this technical solution, a multi-frequency pseudo-random signal is generated by encoding and encapsulating the multi-frequency pseudo-random signal sequence through embedded software. After receiving the pseudo-random signal, the signal receiving module circuit transmits it to the signal amplification module, which outputs the multi-frequency pseudo-random signal and the corresponding control signal. The signal processed by the signal amplification module is then amplified and output by the signal output module to obtain the required multi-frequency pseudo-random signal. Finally, the current carrying the multi-frequency pseudo-random signal, which conforms to electrical stimulation, is output through the therapeutic electrode pad connected to the output interface. This technical solution can output multi-frequency pseudo-random signals of different frequency groups, effectively solving the problem that other electrical stimulation systems have a single electrical stimulation current frequency and can only use one fixed frequency when in use, and cannot output low-order and high-order pseudo-random signals at the same time. Moreover, this signal has the advantages of both low-order and high-order pseudo-random signals, with high security and good confidentiality. The multi-frequency pseudo-random signal is conducive to achieving better stimulation effects, and different frequency groups can be set for different parts of the body to achieve different therapeutic effects in different scenarios.

[0018] This technical solution can solve the problem that existing electrical stimulation systems lack corresponding frequency signals when they need to output signals for specific parts of the body in different scenarios, and cannot change the signals when there are multiple frequencies within a cycle. At the same time, it has the advantages of both low-order and high-order pseudo-random signals, which can be applied to both shallow and deep penetration areas. The time-domain superposition waveform of multi-frequency pseudo-random signals can generate multiple frequency signals at the same time. It has the general characteristics of random waveforms, as well as many advantages such as pre-customization, repeatability, ease of implementation, high confidentiality, and strong targeting.

[0019] The frequency group of the electrical stimulation signal used in this device is adjustable, and it is highly safe. It can set the corresponding frequency group signal according to the stimulation frequency required in different scenarios. It can also perform electrical stimulation on specific groups of people, achieving specialized stimulation while maximizing the stimulation and treatment effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device in the embodiment;

[0021] Figure 2 The following is a waveform diagram of a multi-frequency pseudo-random signal for an example.

[0022] Figure 3 The following is a spectrum diagram of a multi-frequency pseudo-random signal for an example.

[0023] Figure 4 This is a circuit diagram of an arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios.

[0024] Figure 5 This is a schematic diagram of the signal receiving module circuit in the embodiment;

[0025] Figure 6 This is a schematic diagram of the signal amplification module circuit in the embodiment;

[0026] Figure 7 This is a schematic diagram of the signal output module circuit in the embodiment;

[0027] Figure 8 This is a schematic diagram of the power module circuit in the embodiment;

[0028] Figure 9 This is a schematic diagram of the one-button power on / off circuit in the embodiment. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this is not intended to limit the scope of the invention.

[0030] Example:

[0031] like Figure 1 As shown, an arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios includes a signal generation module, a signal receiving module, a signal amplification module, a signal output module, and a power supply module. The signal generation module generates multi-frequency pseudo-random signals by encoding and encapsulating multi-frequency pseudo-random signal encoding sequences (different frequency groups), and burns the corresponding pseudo-random signal code into the microcontroller of the signal receiving module. The signal receiving module has a microcontroller with buttons for setting various parameters. The signal is output from the signal receiving module to the signal amplification module. After processing by an NMOS driver chip and a bootstrap capacitor, the multi-frequency pseudo-random signal and the multi-frequency pseudo-random signal control signal are output and finally output to the output interface. In the power supply module, a +3.7V lithium battery powers the entire device, +3.3V powers the microcontroller, +5V is the transition voltage, and +12V powers the signal amplification module.

[0032] In this embodiment, a fifth-order multi-frequency pseudo-random signal is taken as an example. This signal is composed of a multi-frequency pseudo-random signal encoding sequence. The encoding sequence includes multi-frequency pseudo-random signal encoding and multi-frequency pseudo-random signal control signal encoding, and the encoding has a complete signal cycle of 1 second. The fifth-order multi-frequency pseudo-random signal encoding sequence is (0,219,250,344,375,406,500,594,625,656,750,781,1000), and the fifth-order multi-frequency pseudo-random signal control signal encoding sequence is (0,218,251,343,376,405,501,593,626,655,751,780,1000). By encapsulating the multi-frequency pseudo-random signal sequence encoding and the multi-frequency pseudo-random signal control signal encoding and burning them into the microcontroller, the multi-frequency pseudo-random signal and the multi-frequency pseudo-random signal control signal can be obtained. The waveform of the multi-frequency pseudo-random signal is shown in the figure below. Figure 2 As shown, the signal spectrum is as follows: Figure 3As shown, L is the signal order, F is the signal frequency, and 1 Hz-64 Hz is the frequency range of the multi-frequency pseudo-random signal.

[0033] like Figure 4 As shown, an arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios is disclosed. The device comprises a signal generation module, a signal receiving module, a signal amplification module, a signal output module, and a power supply module connected in sequence. The signal generation module encodes and encapsulates a multi-frequency pseudo-random signal from a multi-frequency pseudo-random signal encoding sequence (different frequency groups) into a multi-frequency pseudo-random signal. The multi-frequency pseudo-random signal code is then burned into the microcontroller of the signal receiving module. The signal receiving module has a microcontroller. The multi-frequency pseudo-random signal, after being encoded and encapsulated, is burned into the microcontroller of the signal receiving module. The first I / O port (TXD) and the second I / O port (RXD) of the microcontroller in the signal receiving module serve as the data ports for receiving the multi-frequency pseudo-random signal. The third I / O port (Signal+) of the microcontroller outputs the signal. The voltage signal carries a multi-frequency pseudo-random signal. The fourth IO port of the microcontroller, Signal+_EN, is the Signal+ enable signal. The fifth IO port of the microcontroller, Signal-, is the inverted Signal+ signal to control the Signal+ signal. The sixth IO port of the microcontroller, Signal-_EN, is the Signal- enable signal. The seventh IO port TX and the eighth IO port RX of the microcontroller are the communication ports of the expansion modules, used for serial communication between the various expansion modules. The ninth IO port EN of the microcontroller is the buzzer enable port. The tenth IO port SCL and the eleventh IO port SDA of the microcontroller are the communication ports of the display screen. The twelfth IO port OUT and the thirteenth IO port IN of the microcontroller are the output and input ports of the one-button power on / off module.

[0034] like Figure 5As shown, the MCU used in the signal receiving module is an STM32L05C8T6. The MCU's first I / O port (TXD) and second I / O port (RXD) serve as the data ports for receiving multi-frequency pseudo-random signals. The MCU's third I / O port (Signal+) outputs a voltage signal carrying the multi-frequency pseudo-random signal to the NMOS driver chip in the signal amplification module. The MCU's fourth I / O port (Signal+_EN) outputs the Signal+ enable signal to the NMOS driver chip in the signal amplification module. The MCU's fifth I / O port (Signal-), which is the inverted Signal+ signal, controls the Signal+ signal. The control signal is also output to the NMOS driver chip in the signal amplification module. The sixth IO port of the microcontroller, Signal-_EN, outputs the Signal- enable signal to the NMOS driver chip in the signal amplification module. The seventh IO port TX and the eighth IO port RX of the microcontroller are the communication ports of the expansion modules, used for serial communication between the expansion modules. The ninth IO port EN of the microcontroller is the buzzer enable port. The tenth IO port SCL and the eleventh IO port SDA of the microcontroller are the communication ports of the display screen. The twelfth IO port OUT and the thirteenth IO port IN of the microcontroller are the output and input ports of the one-button power on / off module.

[0035] like Figure 6 As shown, the signal amplification module includes an NMOS driver circuit, which is connected to the output of the signal receiving module. Specifically, pin 1 of the first NMOS driver chip U2 in the signal amplification circuit is connected to the power supply VCC; pin 2 is connected to the Signal+ pin of the microcontroller in the signal receiving module; pin 3 is connected to the Signal+_EN pin of the microcontroller in the signal receiving module; pin 4 is connected to GND; pin 5 is connected to the gate of Q3 in the signal output module; pin 6 is connected to capacitor C1; pin 7 is connected to the gate of Q1 in the signal output module; and pin 8 is connected to the cathode of diode D5. The anode of D5 is connected to VCC, and one end of capacitor C1 is connected to the cathode of D5, while the other end is connected to… Connect pin 6 of the first NMOS driver chip. In the signal amplification circuit, pin 1 of the second NMOS driver chip U3 is connected to the power supply VCC, pin 2 is connected to the Signal- pin of the microcontroller in the signal receiving module, pin 3 is connected to the Signal-_EN pin of the microcontroller in the signal receiving module, pin 4 is connected to GND, pin 5 is connected to the gate of Q4 in the signal output module, pin 6 is connected to capacitor C2, pin 7 is connected to the gate of Q2 in the signal output module, pin 8 is connected to the cathode of diode D6, the anode of D6 is connected to VCC, one end of capacitor C2 is connected to the cathode of D6, and the other end is connected to pin 6 of the second NMOS driver chip. Both capacitors C1 and C2 are 10uF.

[0036] like Figure 7As shown, the signal output module includes an H-bridge circuit and an output interface. In the signal amplification circuit, the NMOS driver circuit is connected to the gates of signal output circuits Q1, Q2, Q3, and Q4. Specifically, the gate (G) of MOS transistor Q1 is connected to pin 7 of signal amplification module U2, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q3. Similarly, the gate (G) of MOS transistor Q2 is connected to pin 7 of signal amplification module U3, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q4. The gate (G) of MOS transistor Q3 is connected to pin 5 of signal amplification module U2, and its drain (D) is connected to the source of Q1. The source (S) of MOSFET Q4 is connected to GND. The gate (G) of MOSFET Q4 is connected to pin 5 of signal amplifier module U3. The drain (D) of MOSFET Q2 is connected to the source of MOSFET Q2, and the source (S) of MOSFET Q2 is connected to GND. The anode of diode D1 is connected to the source of MOSFET Q1, and the cathode is connected to the drain of MOSFET Q1. The anode of diode D2 is connected to the source of MOSFET Q2, and the cathode is connected to the drain of MOSFET Q2. The anode of diode D3 is connected to the source of MOSFET Q3, and the cathode is connected to the drain of MOSFET Q3. The anode of diode D4 is connected to the source of MOSFET Q4, and the cathode is connected to the drain of MOSFET Q4. One end of resistor R1 is connected to the source of MOSFET Q1, and the other end is connected to the drain of MOSFET Q4. The resistance of resistor R1 is 2 kΩ.

[0037] like Figure 8 As shown, the power module includes a boost IC and a buck IC. The buck IC's pin 1 is connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 3 is connected to one end of resistor R2, the other end of R2 is connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 is connected to GND, and pin 8 is connected to VCC, supplying power to the microcontroller and NMOS driver chip. The boost IC's pin 1 is connected to one end of inductor L1, the other end of inductor L1 is connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 is connected to GND, pin 6 is connected to one end of resistor R5, the other end of resistor R5 is connected to GND, pin 7 is connected to the common point of resistors R3 and R4, and pin 8 is connected to VOUT and one end of resistor R3, the other end of resistor R3 is connected to one end of resistor R4, the other end of resistor R4 is connected to GND. The resistors R2, R3, R4, and R5 are 10 KΩ, 82 KΩ, 4.3 KΩ, and 20 KΩ respectively. The inductor L1 is 4.7 uH.

[0038] like Figure 9 As shown, the one-button power on / off circuit consists of two NPN transistors and an independent button. One end of the independent button B1 is connected to the collector C of transistor Q5, and the other end is connected to the base B of transistor Q6. The base B of transistor Q5 is connected to the OUT of the microcontroller of the signal receiving module, the transmitter E is connected to GND, the emitter E of transistor Q6 is connected to GND, and the collector C is connected to the positive terminal of the lithium battery BATTERY-3.7V and the IN of the microcontroller.

[0039] VCC, VOUT, and GND are all connected to the corresponding VCC, VOUT, and GND terminals on the PCB board. The output interface is connected to the external physiotherapy electrode pads. In this example, the current intensity of the multi-frequency pseudo-random signal after amplification and output through the output interface is within the range of electrical stimulation that is safe for the human body.

[0040] In this example, the multi-frequency pseudo-random signal is a multi-frequency pseudo-random signal formed by a multi-frequency pseudo-random signal encoding sequence. This multi-frequency pseudo-random signal is encapsulated in code and finally burned into the microcontroller.

[0041] In this example, the microcontroller's VCC terminal is connected to the PCB board's VCC terminal, VOUT is connected to the PCB board's VOUT terminal, and GND is connected to the PCB board's GND terminal.

[0042] In this example, the output interface connects to a therapeutic electrode pad, which consists of conductive gel, conductive carbon film, non-woven fabric, and electrode clips. It contains no drug components and, in conjunction with equipment such as low-frequency electrotherapy and interference electrotherapy, transmits the electrical stimulation signal output by the electrotherapy equipment to the surface of the human skin. The output interface connects to the corresponding electrode pad, and by attaching the electrode pad to the surface of the limb, the multi-frequency pseudo-random signal output by the aforementioned arbitrary multi-frequency pseudo-random signal electrostimulation device for multiple fields and scenarios can be used for electrical stimulation.

Claims

1. A device for electrical stimulation of arbitrary multi-frequency pseudo-random signals oriented towards multiple fields and scenarios, characterized in that, The device comprises a signal generation module, a signal receiving module, a signal amplification module, a signal output module, and a power supply module, connected in sequence. The signal generation module generates a multi-frequency pseudo-random signal by encoding and encapsulating a multi-frequency pseudo-random signal encoding sequence (different frequency groups). The corresponding pseudo-random signal code is then burned into the microcontroller of the signal receiving module. The signal receiving module has a microcontroller; the multi-frequency pseudo-random signal is encoded from the multi-frequency pseudo-random signal encoding sequence and encapsulated before being burned into the microcontroller. The first I / O port (TXD) and the second I / O port (RXD) of the microcontroller in the signal receiving module serve as the data ports for receiving the multi-frequency pseudo-random signal. The third I / O port (Signal+) of the microcontroller outputs a voltage signal carrying the multi-frequency pseudo-random signal. The microcontroller's fourth I / O port, Signal+_EN, is the Signal+ enable signal; the fifth I / O port, Signal-, is the inverted Signal+ signal for controlling the Signal+ signal; the sixth I / O port, Signal-_EN, is the Signal- enable signal; the seventh I / O port TX and the eighth I / O port RX are the communication ports for expansion modules, used for serial communication between various expansion modules; the ninth I / O port EN is the buzzer enable port; the tenth I / O port SCL and the eleventh I / O port SDA are the communication ports for the display screen; and the twelfth I / O port OUT and the thirteenth I / O port IN are the output and input ports for the one-button power on / off module. The signal generation module uses embedded software to write multi-frequency pseudo-random signal sequence code and encapsulates the code to generate multi-frequency pseudo-random signals. The multi-frequency pseudo-random signals written in the embedded software are directly burned into the microcontroller. The microcontroller's TXD and RXD interfaces serve as the communication interfaces for burning the code into the microcontroller. The signal receiving module includes a microcontroller circuit, a button control module, and a one-button power on / off circuit. Two different I / O ports, TXD and RXD, are multi-frequency pseudo-random signal code burning communication interfaces. The microcontroller's third I / O port Signal+, fourth I / O port Signal+_EN, fifth I / O port Signal-, and sixth I / O port Signal-_EN are connected to the signal amplification module. The microcontroller's seventh and eighth I / O ports are connected to the expansion module, the ninth I / O port is connected to the buzzer, the tenth and eleventh I / O ports are connected to the display screen, and the twelfth and thirteenth I / O ports are connected to the one-button power on / off circuit. The signal amplification module is equipped with an NMOS driver circuit, which is connected to the output of the signal receiving module. Specifically, in the signal amplification circuit, pin 1 of the first NMOS driver chip U2 is connected to the power supply VCC; pin 2 is connected to the Signal+ pin of the microcontroller in the signal receiving module; pin 3 is connected to the Signal+_EN pin of the microcontroller in the signal receiving module; pin 4 is connected to GND; pin 5 is connected to the gate of Q3 in the signal output module; pin 6 is connected to capacitor C1; pin 7 is connected to the gate of Q1 in the signal output module; and pin 8 is connected to the cathode of diode D5. The anode of D5 is connected to VCC, and one end of capacitor C1 is connected to… The cathode of D5 is connected to pin 6 of the first NMOS driver chip. Pin 1 of the second NMOS driver chip U3 in the signal amplification circuit is connected to the power supply VCC. Pin 2 is connected to the Signal- pin in the microcontroller of the signal receiving module. Pin 3 is connected to the Signal-_EN pin in the microcontroller of the signal receiving module. Pin 4 is connected to GND. Pin 5 is connected to the gate of Q4 in the signal output module. Pin 6 is connected to capacitor C2. Pin 7 is connected to the gate of Q2 in the signal output module. Pin 8 is connected to the cathode of diode D6. The anode of D6 is connected to VCC. One end of capacitor C2 is connected to the cathode of D6, and the other end is connected to pin 6 of the second NMOS driver chip. The signal output module includes an H-bridge circuit and an output interface. In the signal amplification circuit, the NMOS driver circuit is connected to the gates of signal output circuits Q1, Q2, Q3, and Q4. Specifically, the gate (G) of MOS transistor Q1 is connected to pin 7 of signal amplification module U2, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q3. Similarly, the gate (G) of MOS transistor Q2 is connected to pin 7 of signal amplification module U3, its drain (D) is connected to VOUT, and its source (S) is connected to the drain of Q4. The gate (G) of MOS transistor Q3 is connected to pin 5 of signal amplification module U2, and its drain (D) is connected to the drain of Q4.

1. The source of MOSFET Q4 is connected to GND. The gate of MOSFET Q4 is connected to pin 5 of signal amplifier module U3. The drain of MOSFET Q4 is connected to the source of MOSFET Q2. The source of MOSFET Q2 is connected to GND. The anode of diode D1 is connected to the source of MOSFET Q1, and the cathode is connected to the drain of MOSFET Q1. The anode of diode D2 is connected to the source of MOSFET Q2, and the cathode is connected to the drain of MOSFET Q2. The anode of diode D3 is connected to the source of MOSFET Q3, and the cathode is connected to the drain of MOSFET Q3. The anode of diode D4 is connected to the source of MOSFET Q4, and the cathode is connected to the drain of MOSFET Q4. One end of resistor R1 is connected to the source of MOSFET Q1, and the other end is connected to the drain of MOSFET Q4. The power module includes a boost IC and a buck IC. The buck IC has pin 1 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 3 connected to one end of resistor R2, the other end of R2 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 connected to GND, and pin 8 connected to VCC, supplying power to the microcontroller and NMOS driver chip. The boost IC has pin 1 connected to one end of inductor L1, the other end of inductor L1 connected to the positive terminal of the BATTERY-3.7V lithium battery, pin 4 connected to GND, pin 6 connected to one end of resistor R5, the other end of resistor R5 connected to GND, pin 7 connected to the common point of resistors R3 and R4, and pin 8 connected to VOUT and one end of resistor R3, the other end of resistor R3 connected to one end of resistor R4, and the other end of resistor R4 connected to GND. The one-button power on / off circuit consists of two NPN transistors and an independent button. The independent button B1 is connected to the collector C of transistor Q5 and the base B of transistor Q6. The base B of transistor Q5 is connected to the OUT of the microcontroller of the signal receiving module, and the emitter E is connected to GND. The emitter E of transistor Q6 is connected to GND, and the collector C is connected to the positive terminal of the lithium battery BATTERY-3.7V and the IN of the microcontroller. The VCC, VOUT, and GND terminals are all connected to the corresponding VCC, VOUT, and GND terminals on the PCB board, and the output interface is connected to the external physiotherapy electrode pad.

2. The arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios according to claim 1, characterized in that, The microcontroller U1 mentioned is an STM32L05C8T6.

3. The arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios according to claim 1, characterized in that, The first NMOS driver chip U2 and the second NMOS driver chip U3 are both IRF2104, the NMOS transistors Q1, Q2, Q3, and Q4 are all 2N7002W, and the diodes D1, D2, D3, D4, D5, and D6 are all 1N4148W.

4. The arbitrary multi-frequency pseudo-random signal electrical stimulation device for multiple fields and scenarios according to claim 1, characterized in that, The step-down IC is AP2112K-3.3, the boost IC is FP6291LR-G1, and both transistors Q5 and Q6 are MMBT3904.

Images