Wearable multichannel peripheral nerve electric pulse generating device

Abstract

The invention discloses a wearable multi-channel peripheral nerve electric pulse generating device, belongs to the field of electrotherapy of applying current through a contact electrode, and aims to solve the problems that an existing nerve electric pulse generating device is insufficient in precision, poor in portability and limited in number of stimulation channels. The device comprises a wearable arm clamp mechanism and a modular flexible electrode patch, the wearable arm clamp mechanism comprises a circuit board bin, a battery bin and an arm clamp, the arm clamp is of an arc-shaped structure attached to the big arm of the human body, the circuit board bin and the battery bin are inserted into the upper end and the lower end of the arm clamp respectively, and a battery power source is arranged in the battery bin; a control unit MCU and a constant-current pulse generation circuit are arranged in the circuit board bin, and the modular flexible electrode paste is inserted into the circuit board bin; the constant-current pulse generation circuit generates and adjusts an electric pulse signal required by peripheral nerve stimulation under the control of the control unit MCU, and sends the electric pulse signal to the modularized flexible electrode patch attached to a specific position.

Description

Technical Field

[0001] The invention relates to a wearable multi-channel peripheral nerve electric pulse generating device, belonging to the field of electrotherapy applying electric current through contact electrodes. Background Art

[0002] After decades of development, peripheral nerve electrical stimulation technology has been widely used in a variety of medical and non-medical fields. By applying electrical pulses to peripheral nerves, this technology can effectively regulate the nervous system, relieve chronic pain, enhance muscle activity, and promote nerve function recovery, especially in the rehabilitation treatment of neurological diseases such as nerve damage and movement disorders (such as Parkinson's disease and amyotrophic lateral sclerosis).

[0003] In addition to the field of medical rehabilitation, the application of peripheral nerve electrical stimulation technology can also be extended to fields such as tactile feedback systems. Through low-current electrical stimulation, the device can provide realistic tactile feedback to users and is widely used in human-machine interface scenarios such as virtual reality, robot control, and prosthetic interaction. This type of tactile feedback can not only enhance the user experience, but also help amputees achieve more precise control of prostheses through peripheral nerve signals. In these applications, electrical stimulation devices not only require high-precision stimulation control, but also must have the characteristics of high comfort, low energy consumption, and easy wearing.

[0004] In addition, peripheral electrical stimulation technology, as a non-invasive way of transmitting exogenous neural signals, has gradually become an important research direction in neural research and neural interface technology. This signal transmission can not only provide auxiliary support during the recovery of neural damage, but also play an important role in the collection and transmission of neural information. For example, for patients with paralysis or stroke, peripheral nerve electrical stimulation can not only provide control of muscle groups, but also convert the user's EEG, EMG and other neural signals into control commands for the device, thereby achieving control of limb movement functions.

[0005] However, the existing multi-channel peripheral nerve electrical stimulation devices still have several technical bottlenecks in practical applications:

[0006] (1) Insufficient stimulation accuracy: Insufficient flexibility and accuracy of stimulation parameters: Current multi-channel electrical stimulation devices have limitations in the control of stimulation parameters and lack the ability to flexibly program and control the main parameters (such as current intensity, frequency, pulse width, etc.). This results in the inability of the device to adjust the stimulation parameters in real time to achieve personalized treatment according to different treatment needs and individual differences of patients in actual applications. In addition, the stimulation accuracy of existing devices is insufficient, and it is difficult to finely control the output of each channel, which may lead to excessive or insufficient stimulation, affecting the treatment effect and patient comfort.

[0007] (2) Size and portability issues: Existing electrical stimulation devices are mainly used for hospital rehabilitation treatment. Their design and size are usually suitable for medical environments rather than portable use. Such devices usually weigh around 2 to 6 kilograms, especially multi-channel devices, which require a large space. This is extremely inconvenient for users who need to wear them for long periods of time and perform neurostimulation treatments in their daily lives. In addition, the bulkiness of the device also limits its application in a wider range of daily scenarios, such as home care or mobile treatment.

[0008] (3) Limited number of stimulation channels: Most commercial electrical stimulators on the market currently only provide a limited number of channels, generally 2 to 8 channels, which is difficult to meet the needs of complex neural regulation applications that require simultaneous and precise stimulation of multiple points. When more channels are needed to act on a wider or more complex neural network, the application of such devices is greatly limited.

[0009] (4) Low level of intelligence: Existing technologies often use fixed stimulation schemes and lack a real-time dynamic feedback adjustment mechanism, making it difficult to make personalized adjustments based on the needs of different users or actual usage scenarios.

[0010] Therefore, there is an urgent need to develop a new wearable multi-channel peripheral nerve electrical pulse generator that can not only solve the limitations of existing equipment in terms of accuracy, portability, low-current electrical stimulation, etc., but also adapt to a variety of application scenarios, including medical rehabilitation, tactile feedback, neural signal transmission, etc., to improve the overall performance of the device and user experience. Summary of the invention

[0011] In view of the problems of insufficient accuracy, poor portability and limited number of stimulation channels in existing neural electric pulse generating devices, the present invention provides a wearable multi-channel peripheral nerve electric pulse generating device.

[0012] A wearable multi-channel peripheral nerve electric pulse generating device described in the present invention comprises a wearable arm clamp mechanism and a modular flexible electrode patch 2; the wearable arm clamp mechanism comprises a circuit board compartment 1, a battery compartment 3 and an arm clamp 4, the arm clamp 4 is an arc-shaped structure that fits the upper arm of a human body, the upper and lower ends of the arm clamp 4 are respectively plugged into the circuit board compartment 1 and the battery compartment 3, and a battery power source 8 is arranged in the battery compartment 3; a control unit MCU5 and a constant current pulse generating circuit 7 are arranged in the circuit board compartment 1, and the modular flexible electrode patch 2 is plugged into the circuit board compartment 1;

[0013] The constant current pulse generating circuit 7 generates and adjusts the electrical pulse signal required for peripheral nerve stimulation under the control of the control unit MCU5, and sends it to the modular flexible electrode patch 2 attached to a specific position.

[0014] Preferably, the circuit board compartment 1 further includes a wireless communication module 6 , and the control unit MCU5 communicates with the computer PC via the wireless communication module 6 .

[0015] Preferably, the constant current pulse generating circuit 7 includes an integrated boost module 7-1, a current monitoring feedback module 7-2, a multi-channel logic selection module 7-3 and an electrical stimulation parameter modulation module 7-4;

[0016] The integrated voltage boost module 7-1 boosts the low voltage power signal provided by the battery power supply 8 to the required stimulation voltage, so as to provide working power for the current monitoring feedback module 7-2;

[0017] The current monitoring feedback module 7-2 monitors the current applied to the human body in real time, and is loaded on the modular flexible electrode patch 2 through the multi-channel logic check module 7-3. Each channel of the modular flexible electrode patch 2 is independently switched on and off through the multi-channel logic check module 7-3.

[0018] The current loaded on the modular flexible electrode patch 2 by the multi-channel logic selection module 7-3 is adjusted by the electrical stimulation parameter modulation module 7-4 to achieve constant current output.

[0019] Preferably, the integrated boost module 7 - 1 uses a Boost circuit to increase the voltage to an instantaneous maximum of 110V.

[0020] Preferably, the current monitoring feedback module 7-2 includes a feedback resistor R F , NMOS tube Q3, NMOS tube Q4, comparator A1 and analog channel check switch; the multi-channel logic check module 7-3 is an N-channel switch; the electrical stimulation parameter modulation module 7-4 includes a PMOS tube Q1 and a PMOS tube Q2;

[0021] The source of the PMOS tube Q1 and the source of the PMOS tube Q2 simultaneously receive the Boost voltage output by the integrated boost module 7-1, the gate of the PMOS tube Q1 and the gate of the PMOS tube Q2 respectively receive the pulse A and the pulse B output by the control unit MCU5, the drain of the PMOS tube Q1 and the drain of the PMOS tube Q2 are respectively connected to the drain of the NMOS tube Q3 and the drain of the NMOS tube Q4 to form common nodes A and B, and the common nodes A and B output electrical pulses, which are loaded on the modular flexible electrode patch 2 through the N-channel switch;

[0022] The source of NMOS tube Q3 and the source of NMOS tube Q4 are simultaneously fed through feedback resistor R F Ground, feedback resistor R F The voltage V C Feedback input comparator A1 inverting input, reference voltage V REFThe input is connected to the positive input terminal of comparator A1. The output terminal of comparator A1 is connected to the input terminal of the analog channel check switch. The two output terminals of the analog channel check switch are connected to the gate of NMOS tube Q3 and the gate of NMOS tube Q4 respectively. F The voltage V C The switching states of the NMOS tube Q3 and the NMOS tube Q4 are switched to achieve constant current output.

[0023] Preferably, the reference voltage V REF The DAC output is controlled by the control unit MCU5.

[0024] Preferably, the electrical stimulation parameter modulation module 7-4 is used to adjust the electrical stimulation parameters of each channel, wherein the electrical stimulation parameters include current intensity, frequency and pulse width of the pulse signal, wherein the frequency and pulse width of the pulse signal are controlled by the control unit MCU5, and the current intensity is adjusted according to the feedback resistor R F The voltage V C Control the switch state adjustment of the NMOS tube Q3 and the NMOS tube Q4.

[0025] Preferably, the arm clamp 4 is an elastic clamp, comprising an upper module 4-1, a lower module 4-2, a telescopic connector 4-3 and a plug connector 4-4;

[0026] The upper module 4-1 and the lower module 4-2 are connected together by a telescopic connector 4-3. The upper module 4-1 and the lower module 4-2 fit the curvature of the side of the upper arm. Two connectors 4-4 are provided on the front side of the upper end of the upper module 4-1 for plugging in the circuit board compartment 1; two connectors 4-4 are provided on the front side of the lower end of the lower module 4-2 for plugging in the battery compartment 3.

[0027] Preferably, the circuit board bin 1 comprises a bin body 1-1, an upper sliding cover 1-2 and a lower flip cover 1-4, the bin body 1-1 is plugged into the arm clamp 4 through a groove on the rear side, the upper opening of the bin body 1-1 is provided with an upper sliding cover 1-2, the lower end surface of the bin body 1-1 is an arc surface that fits the upper arm of the human body, and a lower opening is provided at one end, the lower opening is connected to the lower flip cover 1-4, and the electrical connection end of the modular flexible electrode patch 2 is inserted into the circuit board inside the circuit board bin 1 through the lower flip cover 1-4; a guide cut angle (1-3) is provided on the front side of the lower end surface of the bin body 1-1 away from the arm clamp 4 for assisting wearing.

[0028] Preferably, the battery compartment 3 includes a No. 2 compartment body 3-1 and a magnetic sliding cover 3-2. The No. 2 compartment body 3-1 is inserted into the arm clamp 4 through a groove on the rear side. One end of the left and right sides of the No. 2 compartment body 3-1 is open, and the magnetic sliding cover 3-2 is installed. The upper end surface of the No. 2 compartment body 3-1 is an arc surface that fits the human body's upper arm. A No. 2 guide cut angle 3-3 is set on the front side of the No. 2 compartment body 3-1 away from the arm clamp 4 for assisting wearing.

[0029] Beneficial effects of the present invention: The wearable peripheral electric pulse generator designed by the present invention has high integration and high channel density. The volume of the circuit board part is only 52mm×72mm×20mm, and the functions such as constant current control, Boost boost, and safety protection are all integrated inside the circuit, and the weight is only 40.5g. Compared with foreign commercial product-level electric stimulators, the electric stimulation device of the present invention has a significant reduction in weight while maintaining a high number of channels. At the same time, the device supports DC power supply and is equipped with a 3500mAh lithium battery with a battery life of up to 7 hours under maximum load.

[0030] In terms of constant current stimulation, the electrical stimulation device of the present invention adopts digital current control, the current output range is 0-65.536mA, and the current output step is 0.256mA. The human body electrical stimulation test experiment shows that the output current of the device meets the instantaneous current range and somatosensory current discrimination accuracy under the condition of human skin surface impedance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a wearable multi-channel peripheral nerve electric pulse generating device according to the present invention;

[0032] Figure 2 This is a schematic diagram of the circuit board compartment, with the upper cover closed;

[0033] Figure 3 This is a schematic diagram of the circuit board compartment with the upper cover open;

[0034] Figure 4 It is a schematic diagram of the structure of the battery compartment;

[0035] Figure 5 It is a schematic diagram of the structure of the arm clamp, and the telescopic part is in the extended state;

[0036] Figure 6 It is a schematic diagram of the structure of the arm clamp, and the telescopic part is in an unextended state;

[0037] Figure 7 is a schematic diagram of the structure of the arm clamp, front view;

[0038] Figure 8 It is a control block diagram of a wearable multi-channel peripheral nerve electric pulse generating device according to the present invention;

[0039] Fig. 9 yes Figure 8 Schematic diagram. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0043] Specific implementation method 1: The following is combined Figures 1 to 9 The present embodiment is described. A wearable multi-channel peripheral nerve electric pulse generating device described in the present embodiment comprises a wearable arm clamp mechanism and a modular flexible electrode patch 2; the wearable arm clamp mechanism comprises a circuit board compartment 1, a battery compartment 3 and an arm clamp 4, the arm clamp 4 is an arc-shaped structure that fits the upper arm of a human body, the upper and lower ends of the arm clamp 4 are respectively plugged into the circuit board compartment 1 and the battery compartment 3, and a battery power source 8 is arranged in the battery compartment 3; a control unit MCU5 and a constant current pulse generating circuit 7 are arranged in the circuit board compartment 1, and the modular flexible electrode patch 2 is plugged into the circuit board compartment 1;

[0044] The constant current pulse generating circuit 7 generates and adjusts the electrical pulse signal required for peripheral nerve stimulation under the control of the control unit MCU5, and sends it to the modular flexible electrode patch 2 attached to a specific position.

[0045] The circuit board compartment 1 also includes a wireless communication module 6 , and the control unit MCU5 communicates with the computer PC via the wireless communication module 6 .

[0046] The constant current pulse generating circuit 7 includes an integrated boost module 7-1, a current monitoring feedback module 7-2, a multi-channel logic selection module 7-3 and an electrical stimulation parameter modulation module 7-4;

[0047] The integrated boost module 7-1 boosts the low-voltage power signal provided by the battery power supply 8 to the required stimulation voltage, which is used to provide working power for the current monitoring feedback module 7-2; the integrated boost module 7-1 uses a Boost circuit to increase the voltage to an instantaneous maximum of 110V. Since the impedance of the human skin surface is usually high, especially when the electrode patch is in contact with the skin, the fluctuation of the impedance will affect the stimulation effect. The circuit of the present invention integrates a Boost circuit inside, which can increase the voltage to an instantaneous maximum of 110V to ensure that the electric pulse can penetrate the skin surface and effectively act on the peripheral nerves. Through this efficient boost mechanism, the device can overcome the impact of changes in skin impedance while ensuring the stability of the current output, ensuring that the device works stably under various physiological conditions.

[0048] The current monitoring feedback module 7-2 monitors the current applied to the human body in real time, and is loaded on the modular flexible electrode patch 2 through the multi-channel logic check module 7-3. Each channel of the modular flexible electrode patch 2 realizes independent switch control through the multi-channel logic check module 7-3; the current monitoring feedback module 7-2 integrates current negative feedback, and the voltage at point C is monitored as the monitoring voltage of the feedback resistor, which can realize real-time monitoring and control of the current applied to the human body, ensuring that the equipment operates within a safe range and provides effective neural stimulation. The present invention adopts a bridge circuit composed of Q1-Q4, which converts the original DC pulse signal into a bidirectional symmetrical balanced pulse, thereby achieving a more balanced current distribution. This conversion process ensures the symmetry of the electrical stimulation signal between the positive and negative poles, reduces the polarization effect that may be caused by direct current, and avoids long-term damage to the skin or tissue.

[0049] The current loaded on the modular flexible electrode patch 2 by the multi-channel logic check module 7-3 is adjusted by the electrical stimulation parameter modulation module 7-4 to achieve constant current output. In order to support multi-channel electrical stimulation, the present invention designs a multi-channel logic check module. This module can independently control the opening and closing of each channel and flexibly adjust the stimulation parameters (such as current intensity, frequency, pulse width, etc.) of each channel. Users can choose to activate specific channels or combinations according to different treatment needs to achieve synchronous or distributed stimulation control of multiple peripheral nerve nodes.

[0050] The multi-channel logic check module 7-3 has two sets of N-way switches, each set of N-way switches is an independent switch implemented by an existing chip, and the two sets of N-way switches are designed to realize a bidirectional channel for each electrode, so that the voltage size of electrodes A and B involved in one channel can have a path.

[0051] The present invention also sets a charge balancing switch between the common node A and the common node B. When the charge between the electrode A and the electrode B accumulates to a certain extent over a long period of time and the voltage difference between the two is too large, the charge balancing switch can be closed to achieve voltage balance.

[0052] The current monitoring feedback module 7-2 includes a feedback resistor R F , NMOS tube Q3, NMOS tube Q4, comparator A1 and analog channel check switch; the multi-channel logic check module 7-3 is an N-channel switch; the electrical stimulation parameter modulation module 7-4 includes a PMOS tube Q1 and a PMOS tube Q2;

[0053] The source of the PMOS tube Q1 and the source of the PMOS tube Q2 simultaneously receive the Boost voltage output by the integrated boost module 7-1, the gate of the PMOS tube Q1 and the gate of the PMOS tube Q2 respectively receive the pulse A and the pulse B output by the control unit MCU5, the drain of the PMOS tube Q1 and the drain of the PMOS tube Q2 are respectively connected to the drain of the NMOS tube Q3 and the drain of the NMOS tube Q4 to form common nodes A and B, and the common nodes A and B output electrical pulses, which are loaded on the modular flexible electrode patch 2 through the N-channel switch;

[0054] The source of NMOS tube Q3 and the source of NMOS tube Q4 are simultaneously fed through feedback resistor R F Ground, feedback resistor R F The voltage V C Feedback input comparator A1 inverting input, reference voltage V REF The input is connected to the positive input terminal of comparator A1. The output terminal of comparator A1 is connected to the input terminal of the analog channel check switch. The two output terminals of the analog channel check switch are connected to the gate of NMOS tube Q3 and the gate of NMOS tube Q4 respectively. F The voltage V C The switching states of the NMOS tube Q3 and the NMOS tube Q4 are switched to achieve constant current output.

[0055] Reference voltage V REF The DAC output is controlled by the control unit MCU5.

[0056] The voltage V at point C C With reference voltage V REF By comparison, comparator A1 outputs 0 or 1 to control the switching state of Q3 and Q4 and adjust the current flowing through the feedback resistor R F The current intensity.

[0057] The electrical stimulation parameter modulation module 7-4 is used to adjust the electrical stimulation parameters of each channel, wherein the electrical stimulation parameters include current intensity, frequency and pulse width of the pulse signal, wherein the frequency and pulse width of the pulse signal are controlled by the control unit MCU5, and the current intensity is adjusted according to the feedback resistor R F The voltage V C Control the switch state adjustment of NMOS tube Q3 and NMOS tube Q4. This module is an important part of the entire circuit part and is responsible for real-time adjustment of the main parameters of the current, including pulse width, frequency and current intensity. Through the precise control of these parameters, the device can dynamically adjust the stimulation mode according to different treatment or functional needs. This module ensures that the device can adapt to the individual needs of different patients and optimize the effect during the treatment process, such as for applications such as pain management, motor function recovery or tactile feedback.

[0058] In order to improve the wearing comfort and stimulation effect of the user, the present invention adopts flexible electrode patches with modular design. These electrode patches can flexibly fit different parts of the body, ensuring close contact between the electrode and the skin, thereby improving the conduction effect of electrical stimulation. The modular design allows users to flexibly adjust the number and placement of electrodes according to different treatment needs and stimulation locations.

[0059] The circuit board compartment 1, the battery compartment 3 and the arm clip 4 constitute a wearable housing: The housing of the device is designed with lightweight, high-strength materials, which not only ensures the durability of the device but also provides good portability. The shape of the housing is ergonomically designed to fit the natural curve of the body and is suitable for long-term wear. The housing has sweat-proof and waterproof properties to ensure the stability and durability of the device in daily use.

[0060] The circuit board compartment 1, the battery compartment 3, and the arm clip 4 are separate. The circuit board compartment 1 and the battery compartment 3 are adapted to the outer and inner curvatures of the human upper arm. The arm clip 4 is height-adjustable and provides multiple size versions, all of which fit the side curvature of the upper arm and can meet the wearing needs of different people.

[0061] The arm clamp 4 is an elastic clamp, comprising an upper module 4-1, a lower module 4-2, a telescopic connector 4-3 and a plug connector 4-4;

[0062] The upper module 4-1 and the lower module 4-2 are connected together by a telescopic connector 4-3. The upper module 4-1 and the lower module 4-2 fit the curvature of the side of the upper arm. Two connectors 4-4 are provided on the front side of the upper end of the upper module 4-1 for plugging in the circuit board compartment 1; two connectors 4-4 are provided on the front side of the lower end of the lower module 4-2 for plugging in the battery compartment 3.

[0063] The circuit board bin 1 adopts a sliding cover design, which is convenient for disassembly and debugging of the circuit board; a flap is reserved for the plug strip of the modular electrode patch to facilitate the plugging and unplugging of the electrode patch. The circuit board bin 1 includes a No. 1 bin body 1-1, an upper sliding cover 1-2 and a lower flap 1-4. The No. 1 bin body 1-1 is plugged into the arm clamp 4 through the groove on the rear side. The upper opening of the No. 1 bin body 1-1 is provided with an upper sliding cover 1-2. The lower end surface of the No. 1 bin body 1-1 is an arc surface that fits the upper arm of the human body, and a lower opening is provided at one end. The lower opening is connected to the lower flap 1-4. The electrical connection end of the modular flexible electrode patch 2 is inserted into the circuit board inside the circuit board bin 1 through the lower flap 1-4; a No. 1 guide cut angle (1-3) is provided on the front side of the lower end surface of the No. 1 bin body 1-1 away from the arm clamp 4 for assisting wearing.

[0064] The battery compartment 3 adopts a magnetic sliding cover design, which is quick to disassemble and assemble, and can be loaded with a 18650 7.4V 3500mAh lithium battery. The size of the battery compartment can be changed according to the battery life requirements, providing a lighter and more flexible wearing experience. The battery compartment 3 includes a No. 2 compartment body 3-1 and a magnetic sliding cover 3-2. The No. 2 compartment body 3-1 is plugged into the arm clip 4 through the rear side groove. The No. 2 compartment body 3-1 has an opening on one end of the left and right sides, and is equipped with a magnetic sliding cover 3-2. The upper end surface of the No. 2 compartment body 3-1 is an arc surface that fits the upper arm of the human body. The No. 2 compartment body 3-1 is set with a No. 2 guide cut corner 3-3 on the front side away from the arm clip 4 for auxiliary wearing. The battery compartment 3 contains a battery power supply 8, and the device is equipped with a high-efficiency battery system that can provide power support for the device for a long time and stably. The battery design is compact and can meet the portability requirements of wearable devices. Through the optimized power management system, the battery life is extended and the need for frequent charging is reduced, thereby improving the user experience.

[0065] The circuit board compartment 1 and the battery compartment 3 are designed with an angle cut away from the arm clip 4. When wearing, you only need to push lightly with light force. With the help of the guide design of the angle cut and the elasticity of the arm clip, you can smoothly wear the device. After wearing, the circuit board compartment 1 and the battery compartment 3 are locked with the arm clip 4, so there is no feeling of oppression and it is not easy to fall off.

[0066] As shown in Table 1, compared with foreign commercial product-level electrical stimulators, the electrical stimulation device of the present invention has a significantly reduced weight while maintaining a high number of channels. At the same time, the device supports DC power supply and is equipped with a 3500mAh lithium battery with a battery life of up to 7 hours under maximum load.

[0067] In terms of constant current stimulation, the electrical stimulation device of the present invention adopts digital current control, the current output range is 0-65.536mA, and the current output step is 0.256mA. The human body electrical stimulation test experiment shows that the output current of the device meets the instantaneous current range and somatosensory current discrimination accuracy under the condition of human skin surface impedance.

[0068] Table 1 Comparison with current foreign commercial-grade peripheral electrical stimulator products

[0069]

[0070] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with a single embodiment may be used in other described embodiments.

Claims

1. A wearable multi-channel peripheral nerve electric pulse generating device, characterized in that: The invention comprises a wearable arm clamp mechanism and a modular flexible electrode patch (2); the wearable arm clamp mechanism comprises a circuit board compartment (1), a battery compartment (3) and an arm clamp (4); the arm clamp (4) is an arc-shaped structure that fits the upper arm of a human body; the upper and lower ends of the arm clamp (4) are respectively plugged into the circuit board compartment (1) and the battery compartment (3); a battery power source (8) is arranged in the battery compartment (3); a control unit MCU (5) and a constant current pulse generating circuit (7) are arranged in the circuit board compartment (1); and the modular flexible electrode patch (2) is plugged into the circuit board compartment (1); The constant current pulse generating circuit (7) generates and adjusts the electric pulse signal required for peripheral nerve stimulation under the control of the control unit MCU (5), and sends it to the modular flexible electrode patch (2) attached to a specific position.

2. A wearable multi-channel peripheral nerve electric pulse generator according to claim 1, characterized in that: The circuit board compartment (1) also includes a wireless communication module (6), and the control unit MCU (5) communicates with the computer PC via the wireless communication module (6).

3. A wearable multi-channel peripheral nerve electric pulse generator according to claim 2, characterized in that: The constant current pulse generating circuit (7) comprises an integrated voltage boosting module (7-1), a current monitoring feedback module (7-2), a multi-channel logic selection module (7-3) and an electrical stimulation parameter modulation module (7-4); The integrated voltage boost module (7-1) boosts the low voltage power signal provided by the battery power source (8) to the required stimulation voltage, so as to provide working power for the current monitoring feedback module (7-2); The current monitoring feedback module (7-2) monitors the current applied to the human body in real time and is loaded on the modular flexible electrode patch (2) through the multi-channel logic check module (7-3). Each channel of the modular flexible electrode patch (2) is independently switched on and off through the multi-channel logic check module (7-3); The current loaded on the modular flexible electrode patch (2) by the multi-channel logic selection module (7-3) is adjusted by the electrical stimulation parameter modulation module (7-4) to achieve constant current output.

4. A wearable multi-channel peripheral nerve electric pulse generator according to claim 3, characterized in that: The integrated boost module (7-1) uses a Boost circuit to increase the voltage to an instantaneous maximum of 110V.

5. A wearable multi-channel peripheral nerve electric pulse generating device according to claim 4, characterized in that: The current monitoring feedback module (7-2) includes a feedback resistor R F , NMOS tube Q3, NMOS tube Q4, comparator A1 and analog channel check switch; the multi-channel logic check module (7-3) is an N-channel switch; the electrical stimulation parameter modulation module (7-4) includes a PMOS tube Q1 and a PMOS tube Q2; The source of the PMOS tube Q1 and the source of the PMOS tube Q2 simultaneously receive the Boost voltage output by the integrated boost module (7-1); the gate of the PMOS tube Q1 and the gate of the PMOS tube Q2 respectively receive the pulse A and the pulse B output by the control unit MCU (5); the drain of the PMOS tube Q1 and the drain of the PMOS tube Q2 are respectively connected to the drain of the NMOS tube Q3 and the drain of the NMOS tube Q4 to form common nodes A and B; the common nodes A and B output electrical pulses and are loaded on the modular flexible electrode patch (2) through the N-channel switch; The source of NMOS tube Q3 and the source of NMOS tube Q4 are simultaneously fed through feedback resistor R F Ground, feedback resistor R F The voltage V C Feedback input comparator A1 inverting input, reference voltage V REF The input is connected to the positive input terminal of comparator A1. The output terminal of comparator A1 is connected to the input terminal of the analog channel check switch. The two output terminals of the analog channel check switch are connected to the gate of NMOS tube Q3 and the gate of NMOS tube Q4 respectively. F The voltage V C The switching states of the NMOS tube Q3 and the NMOS tube Q4 are switched to achieve constant current output.

6. A wearable multi-channel peripheral nerve electric pulse generating device according to claim 5, characterized in that: Reference voltage V REF The DAC output is controlled by the control unit MCU (5).

7. A wearable multi-channel peripheral nerve electric pulse generator according to claim 5, characterized in that: The electrical stimulation parameter modulation module (7-4) is used to adjust the electrical stimulation parameters of each channel, wherein the electrical stimulation parameters include current intensity, frequency and pulse width of the pulse signal, wherein the frequency and pulse width of the pulse signal are controlled by the control unit MCU (5), and the current intensity is controlled according to the feedback resistor R F The voltage V C Control the switch state adjustment of the NMOS tube Q3 and the NMOS tube Q4.

8. A wearable multi-channel peripheral nerve electric pulse generator according to claim 1, characterized in that: The arm clamp (4) is an elastic clamp, comprising an upper module (4-1), a lower module (4-2), a telescopic connector (4-3) and a plug connector (4-4); The upper module (4-1) and the lower module (4-2) are connected together via a telescopic connector (4-3); the upper module (4-1) and the lower module (4-2) fit the curvature of the side of the upper arm; the upper front side of the upper module (4-1) is provided with two plug-in connectors (4-4) for plugging into the circuit board compartment (1); and the lower front side of the lower module (4-2) is provided with two plug-in connectors (4-4) for plugging into the battery compartment (3).

9. A wearable multi-channel peripheral nerve electric pulse generating device according to claim 8, characterized in that: The circuit board bin (1) comprises a bin body (1-1), an upper sliding cover (1-2) and a lower flip cover (1-4); the bin body (1-1) is plugged into the arm clamp (4) through a groove on the rear side surface; the upper opening of the bin body (1-1) is provided with an upper sliding cover (1-2); the lower end surface of the bin body (1-1) is an arc surface that fits the upper arm of a human body, and a lower opening is provided at one end, the lower opening is connected to the lower flip cover (1-4); the electrical connection end of the modular flexible electrode patch (2) is plugged into the circuit board inside the circuit board bin (1) through the lower flip cover (1-4); a guide cut angle (1-3) is provided on the front side of the lower end surface of the bin body (1-1) away from the arm clamp (4) for assisting wearing.

10. A wearable multi-channel peripheral nerve electric pulse generating device according to claim 8, characterized in that: The battery compartment (3) comprises a second compartment body (3-1) and a magnetic sliding cover (3-2); the second compartment body (3-1) is plugged into the arm clamp (4) through a groove on the rear side surface; one end of the left and right sides of the second compartment body (3-1) is open and the magnetic sliding cover (3-2) is installed; the upper end surface of the second compartment body (3-1) is an arc surface that fits the upper arm of the human body; the front side of the second compartment body (3-1) away from the arm clamp (4) is provided with a second guide cut corner (3-3) for assisting wearing.

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