An electric pulse stimulation circuit

Abstract

The present application relates to an electric pulse stimulation circuit, which belongs to the technical field of circuits. The circuit includes a control module, a boost circuit, a pulse stimulation circuit, a detection circuit and two electrode sheets. The pulse stimulation circuit includes three output terminals and two control terminals; wherein the input terminal of the control module is respectively connected to the output terminal of a power supply module for power supply and the output terminal of the detection circuit, and the output terminal of the control module is respectively connected to the input terminal of the boost circuit and the two control terminals of the pulse stimulation circuit; the output terminal of the boost circuit is connected to the input terminal of the pulse stimulation circuit, and the input terminal of the boost circuit is connected to the output terminal of the power supply module; the first output terminal of the pulse stimulation circuit is connected to an electrode sheet, the second output terminal is connected to another electrode sheet, and the third output terminal is connected to the input terminal of the detection circuit. The present application has the effect of utilizing the pressure difference between the two electrode sheets to promote blood circulation in the neck or other muscle tissues.

Description

Technical Field

[0001] The present application relates to the technical field of circuits, and in particular to an electric pulse stimulation circuit. Background Art

[0002] Nowadays, many intelligent electronic products have been integrated into human life, such as mobile phones, tablet computers, PCs, etc. Many people have become inseparable from mobile phones, and white-collar workers are even more inseparable from computers. When using such electronic products, this group of people have become "head-down tribes".

[0003] Studies have shown that looking down at your phone for a long time can lead to the following: the curvature of the cervical vertebrae becomes straight or even reversed; excessive force on the vertebral body causes excessive compression of the intervertebral discs between the vertebrae, causing disc herniation; repeated pulling of the muscles, fascia, and ligaments at the back of the neck causes muscle strain and myofasciitis or ligament stiffness and calcification. These conditions can cause compression of the nerves and blood vessels in the neck; obvious headaches, dizziness, numbness in the arms and hands; and weakness in the limbs caused by compression of the spinal cord.

[0004] Therefore, it is urgently necessary to propose an electric pulse stimulation circuit that can be used in a massager, which aims to relieve muscle or neck fatigue at work or in life, and relieve neck discomfort caused by maintaining a fixed posture for a long time (such as lowering the head) by promoting blood circulation in the neck or other muscle tissues. Summary of the invention

[0005] In order to promote blood circulation in the neck or other muscle tissues, the present application provides an electric pulse stimulation circuit, which adopts the following technical solutions:

[0006] An electric pulse stimulation circuit comprises a control module, a boost circuit, a pulse stimulation circuit, a detection circuit and two electrode sheets, wherein the pulse stimulation circuit comprises three output terminals and two control terminals;

[0007] Among them, the input end of the control module is respectively connected to the output end of the power supply module for power supply and the output end of the detection circuit, and the output end of the control module is respectively connected to the input end of the boost circuit and the two control ends of the pulse stimulation circuit; the output end of the boost circuit is connected to the input end of the pulse stimulation circuit, and the input end of the boost circuit is connected to the output end of the power supply module; the first output end of the pulse stimulation circuit is connected to one of the electrode sheets, the second output end is connected to another of the electrode sheets, and the third output end is connected to the input end of the detection circuit.

[0008] By adopting the above technical solution, when the control module detects that the detection circuit outputs a low level, it means that the two electrode sheets are placed on the human body, and then the control module outputs a PWM waveform to control the boost circuit to be turned on. The boost circuit supplies power to the pulse stimulation circuit, and then the control module outputs a PWM waveform to control the on and off of the pulse stimulation circuit, thereby generating a pressure difference between the two electrode sheets, thereby achieving the purpose of stimulating the skin, thereby realizing the effect of promoting blood circulation in the neck or other muscle tissues.

[0009] Optionally, the boost circuit includes a first inductor L1, a first polarized capacitor C1, a first switch tube circuit, a rectifier circuit, a first resistor R1 and a second switch tube circuit, and the boost circuit has two control terminals;

[0010] Among them, one end of the first inductor L1 is connected to the input end of the boost circuit, and the other end is respectively connected to the collector of the first switch tube circuit and the input end of the rectifier circuit; the emitter of the first switch tube circuit is grounded, and the base is connected to a control end of the boost circuit; the output end of the rectifier circuit is connected to the positive electrode of the first polar capacitor C1, and the negative electrode of the first polar capacitor C1 is grounded; one end of the first resistor R1 is respectively connected to the positive electrode of the first polar capacitor C1 and the output end of the boost circuit, and the other end of the first resistor R1 is connected to the collector of the second switch tube circuit; the emitter of the second switch tube circuit is grounded, and the base is connected to the other control end of the boost circuit; the charging speed of the first inductor R1 is greater than the discharging speed of the first resistor R1.

[0011] By adopting the above technical solution, when a PWM waveform is input to one control end of the boost circuit, the on-off of the first switch tube circuit is controlled, thereby controlling the first inductor L1 to store and transfer energy to the first polarized capacitor C1 to realize the charging of the first polarized capacitor C1; when the first switch tube circuit is turned on, the first inductor L1 stores energy, and when the first switch tube circuit is turned off, the first inductor L1 transfers the stored energy to the first polarized capacitor C1; when a PWM waveform is input to the other control end of the boost circuit, the on-off of the second switch tube circuit is controlled, thereby controlling the discharge of the first polarized capacitor C1.

[0012] Optionally, the duty cycle of the PWM waveform input to the base of the first switching tube circuit is fixed, and the PWM waveform input to the base of the second switching tube circuit is adjustable; wherein the two PWM waveforms are synchronously input to the control end of the corresponding boost circuit.

[0013] By adopting the above technical solution, the duty cycle of the PWM waveform of the first switching tube circuit is fixedly controlled so that the first inductor L1 stores fixed energy; the duty cycle of the PWM waveform of the second switching tube circuit is adjusted to adjust the discharge time of the first polarized capacitor C1, so that the boost circuit outputs a controllable boost voltage value.

[0014] Optionally, the boost circuit further includes a filter subcircuit, an input end of the filter subcircuit is connected to a control end of the boost circuit, and an output end of the filter subcircuit is connected to the base of the first switch tube subcircuit.

[0015] By adopting the above technical solution, the purpose of setting the filtering sub-circuit is to improve the driving ability of the first switch tube sub-circuit.

[0016] Optionally, the pulse stimulation circuit includes an H-bridge circuit, a third switch tube circuit and a fourth switch tube circuit; the H-bridge circuit includes three output terminals and four control terminals, and the three output terminals are three output terminals of the pulse stimulation circuit;

[0017] Among them, the base of the third switching tube circuit is connected to one control end of the pulse stimulation circuit, the collector is respectively connected to the first control end and the input end of the H-bridge circuit, and the emitter is grounded; the base of the fourth switching tube circuit is connected to the other control end of the pulse stimulation circuit, the collector is respectively connected to the second control end and the input end of the H-bridge circuit, and the emitter is grounded; the third control end of the H-bridge circuit is connected to the second control end of the H-bridge circuit, and the fourth control end of the H-bridge circuit is connected to the first control end of the H-bridge circuit; wherein, the PWM waveform input to the base of the third switching tube circuit and the PWM waveform input to the base of the fourth switching tube circuit are complementary waveforms.

[0018] By adopting the above technical solution, when the base input of the third switch tube circuit is high level, the third switch tube circuit is turned on, and the first control end of the H-bridge circuit and the fourth control end of the H-bridge circuit are low level, so that the two electrode sheets form a current loop with the human body, and the electrode sheets are divided into positive electrode sheets and negative electrode sheets, the positive electrode sheet is the high voltage positive end, and the negative electrode sheet is the low voltage negative end; similarly, when the base input of the fourth switch tube circuit is high level, the fourth switch tube circuit is turned on, and the second control end and the third control end of the H-bridge circuit are low level, so that the two electrode sheets form a current loop with the human body, and the positive electrode sheet is the low voltage negative end, and the negative electrode sheet is the high voltage positive end.

[0019] Optionally, the pulse stimulation circuit further includes a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5;

[0020] Among them, the second resistor R2 is connected in series to the circuit connecting the collector of the third switching tube circuit and the input end of the H-bridge circuit, the third resistor R3 is connected in series to the circuit connecting the first control end of the H-bridge circuit and the collector of the third switching tube circuit, the fourth resistor R4 is connected in series to the circuit connecting the input end of the H-bridge circuit and the collector of the fourth switching tube circuit, and the fifth resistor R5 is connected in series to the circuit connecting the second control end of the H-bridge circuit and the collector of the fourth switching tube circuit.

[0021] By adopting the above technical solution, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5 are all bias resistors, providing stable static operation for the amplification of the H-bridge circuit.

[0022] Optionally, the H-bridge circuit includes a fifth switch tube circuit, a sixth switch tube circuit, a seventh switch tube circuit and an eighth switch tube circuit;

[0023] Among them, the emitter of the fifth switch tube circuit is connected to the input end of the H-bridge circuit, the base is connected to the first control end of the H-bridge circuit, and the collector is connected to the first output end of the H-bridge circuit; the emitter of the sixth switch tube circuit is connected to the input end of the H-bridge circuit, the base is connected to the second control end of the H-bridge circuit, and the collector is connected to the second output end of the H-bridge circuit; the emitter of the seventh switch tube circuit is connected to the first output end of the H-bridge circuit, the collector is connected to the third output end of the H-bridge circuit, and the base is connected to the second control end of the H-bridge circuit; the emitter of the eighth switch tube circuit is connected to the second output end of the H-bridge circuit, the base is connected to the first control end of the H-bridge circuit, and the collector is connected to the collector of the seventh switch tube circuit.

[0024] By adopting the above technical solution, when the first control end of the H-bridge circuit and the fourth control end of the H-bridge circuit are at a low level, the fifth switch tube circuit and the eighth switch tube circuit are turned on; when the second control end and the third control end of the H-bridge circuit are turned on, the sixth switch tube circuit and the seventh switch tube circuit are turned on.

[0025] Optionally, the detection circuit includes a ninth switch tube circuit, the base of the ninth switch tube circuit is connected to the input end of the detection circuit, the emitter is grounded, and the collector is connected to the output end of the detection circuit.

[0026] By adopting the above technical solution, when the detection circuit outputs a low level to the control module, it means that the input end of the detection circuit is a high level, and at this time the two electrode sheets are connected to the human body; when the detection circuit outputs a high level to the control module, it means that the input end of the detection circuit is a low level, and at this time the two electrode sheets are not connected to the human body.

[0027] Optionally, the detection circuit further includes a sixth resistor R6, one end of the sixth resistor R6 is grounded, and the other end is connected to the input end of the detection circuit.

[0028] By adopting the above technical solution, the sixth resistor R6 provides a stable static operating point for the ninth switch tube circuit, limiting the drift point of the detection circuit.

[0029] Optionally, the detection circuit also includes a first diode D1, the anode of the first diode D1 is grounded, and the cathode is connected to a circuit connected to the other end of the sixth resistor R6 and the base of the ninth switch tube circuit.

[0030] By adopting the above technical solution, the first diode D1 provides a stable voltage point for the tenth switch tube circuit to control the conduction of the ninth switch tube circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the overall structural block diagram of the electric pulse stimulation circuit of the present application;

[0032] Figure 2 yes Figure 1 Schematic diagram of the circuit structure of the medium boost circuit;

[0033] Figure 3 This is a schematic diagram of the control waveforms of DC_PWM and OL_FD;

[0034] Figure 4 yes Figure 1 Schematic diagram of the circuit structure of the medium pulse stimulation circuit;

[0035] Figure 5 It is a schematic diagram of the combined waveform of LOWC_A and LOWC_B;

[0036] Figure 6 yes Figure 1 Schematic diagram of the circuit structure of the detection circuit;

[0037] Figure 7 is a schematic diagram of the tapping mode waveform;

[0038] Figure 8 It is a schematic diagram of the Gua Sha mode waveform;

[0039] Fig. 9 It is a schematic diagram of the waveform of acupuncture mode;

[0040] Fig.10 It is a schematic diagram of the waveform of the massage mode;

[0041] Fig.11 is a schematic diagram of the automatic combination mode waveform.

[0042] Explanation of the accompanying drawings: 110, power supply module; 120, control module; 130, boost circuit; 131, first switch tube circuit; 132, rectifier circuit; 133, second switch tube circuit; 134, filter circuit; 140, pulse stimulation circuit; 141, H-bridge circuit; 142, third switch tube circuit; 143, fourth switch tube circuit; 144, fifth switch tube circuit; 145, sixth switch tube circuit; 147, seventh switch tube circuit; 148, eighth switch tube circuit; 150, detection circuit; 151, ninth switch tube circuit; 160, electrode sheet. DETAILED DESCRIPTION

[0043] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1 -Attached Fig.11 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. 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.

[0044] The present application discloses an electric pulse stimulation circuit. Figure 1 As an implementation of the electric pulse stimulation circuit, the electric pulse stimulation circuit includes a control module 120, a boost circuit 130, a pulse stimulation circuit 140, a detection circuit 150 and two electrode sheets 160; wherein, one electrode sheet 160 is a positive electrode sheet, and the other electrode sheet 160 is a negative electrode sheet, and the pulse stimulation circuit 140 includes three output terminals and two control terminals.

[0045] Among them, the input end of the control module 120 is respectively connected to the output end of the power supply module 110 for power supply and the output end of the detection circuit 150, and the output end of the control module 120 is respectively connected to the control end of the boost circuit 130 and the two control ends of the pulse stimulation circuit 140; the output end of the boost circuit 130 is connected to the input end of the pulse stimulation circuit 140, and the input end of the boost circuit 130 is connected to the output end of the power supply module 110; the first output end of the pulse stimulation circuit 140 is connected to an electrode sheet 160, the second output end is connected to another electrode sheet 160, and the third output end is connected to the input end of the detection circuit 150.

[0046] The power supply module 110 may use a lithium battery, and the control module 120 may be a device with control and processing functions such as a single-chip microcomputer or a PLC. In the present application, the control module 120 uses a single-chip microcomputer, namely, an MCU.

[0047] Reference Figure 2 As an implementation of the boost circuit 130, the boost circuit 130 may include a first inductor L1, a first polarized capacitor C1, a first switch tube circuit 131, a rectifier circuit 132, a first resistor R1 and a second switch tube circuit 133. The boost circuit 130 has two control terminals; the input terminal of the boost circuit 130 is connected to VDD, and VDD is the voltage of the power supply module 110.

[0048] Among them, one end of the first inductor L1 is connected to the input end of the boost circuit 130, and the other end is respectively connected to the collector of the first switch tube circuit 131 and the input end of the rectifier circuit 132; the emitter of the first switch tube circuit 131 is grounded, and the base is connected to a control end of the boost circuit 130; the output end of the rectifier circuit 132 is connected to the positive electrode of the first polar capacitor C1, and the negative electrode of the first polar capacitor C1 is grounded; one end of the first resistor R1 is respectively connected to the positive electrode of the first polar capacitor C1 and the output end of the boost circuit 130, and the other end of the first resistor R1 is connected to the collector of the second switch tube circuit 133; the emitter of the second switch tube circuit 133 is grounded, and the base is connected to the other control end of the boost circuit 130. It should be noted that the charging speed of the first inductor R1 is greater than the discharging speed of the first resistor R1.

[0049] In addition, the duty cycle of the PWM waveform input to the base of the first switch tube circuit 131 can be fixed, and the PWM waveform input to the base of the second switch tube circuit 133 can be adjusted; wherein the two PWM waveforms are synchronously input to the control end of the corresponding boost circuit 130.

[0050] For example, the PWM waveform of the base input of the first switch tube circuit 131 is set to DC_PWM, and the PWM waveform of the base input of the second switch tube circuit 133 is set to OL_FD; then in the massager, the lowest gear is DC_PWM with an output frequency of 10K and a PWM duty cycle of 50%; OL_FD output frequency is 10K and a PWM duty cycle of 50%; the two PWMs are turned on synchronously; other high gears can fix the duty cycle of DC_PWM and gradually reduce the duty cycle of OL_FD, so OL_VCC, i.e., the voltage output by the boost circuit 130, gradually increases. Among them, the control waveforms of DC_PWM and OL_FD are as follows: Figure 3 shown.

[0051] Among them, mark 1 refers to the waveform of DC_PWM and OL_FD with a duty cycle of 50% at the lowest gear, mark 2 is the waveform of OL_FD with a reduced duty cycle, and mark 3 refers to the waveform of OL_FD with a duty cycle of 0 at the highest gear.

[0052] Reference Figure 2In order to improve the driving capability of the first switch tube circuit 131, the boost circuit 130 also includes a filter subcircuit 134, the input end of the filter subcircuit 134 is connected to a control end of the boost circuit 130, and the output end of the filter subcircuit 134 is connected to the base of the first switch tube circuit 131.

[0053] As an implementation of the filtering subcircuit 134, the filtering subcircuit 134 may include a seventh resistor R7 and a second polarized capacitor C2; one end of the seventh resistor R7 is connected to the input end of the filtering subcircuit 134, and the other end is connected to the output end of the filtering subcircuit 134, and the second polarized capacitor C2 is connected in parallel with the seventh resistor R7.

[0054] The boost circuit 130 further includes a third polar capacitor C3 , a negative electrode of the third polar capacitor C3 is grounded, and a positive electrode is connected to the input end of the boost circuit 130 . The third polar capacitor C3 is a filter capacitor.

[0055] The boost circuit 130 also includes an eighth resistor R8, one end of the eighth resistor R8 is connected to the other control end of the boost circuit 130, and the other end is connected to the base of the second switch tube circuit 133. The eighth resistor R8 is a current limiting resistor.

[0056] As an implementation of the rectifier circuit 132, the rectifier circuit 132 includes a second diode D2, which is connected in series to a circuit connecting the collector of the first switching tube circuit 131 and the positive electrode of the first polarized capacitor C1; wherein the positive electrode of the second diode D2 is connected to the collector of the first switching tube circuit 131.

[0057] Reference Figure 4 As an implementation of the pulse stimulation circuit 140, the pulse stimulation circuit 140 may include an H-bridge circuit 141, a third switch tube circuit 142 and a fourth switch tube circuit 143; the H-bridge circuit 141 includes three output ends and four control ends, and the three output ends are the three output ends of the pulse stimulation circuit 140.

[0058] Among them, the base of the third switch tube circuit 142 is connected to a control end of the pulse stimulation circuit 140, the collector is respectively connected to the first control end and the input end of the H-bridge circuit 141, and the emitter is grounded; the base of the fourth switch tube circuit 143 is connected to the other control end of the pulse stimulation circuit 140, the collector is respectively connected to the second control end and the input end of the H-bridge circuit 141, and the emitter is grounded; the third control end of the H-bridge circuit 141 is connected to the second control end of the H-bridge circuit 141, and the fourth control end of the H-bridge circuit 141 is connected to the first control end of the H-bridge circuit 141; it should be noted that the PWM waveform input to the base of the third switch tube circuit 142 and the PWM waveform input to the base of the fourth switch tube circuit are complementary waveforms.

[0059] In order to provide stable static operation for the amplification of the H-bridge circuit 141, the pulse stimulation circuit 140 further includes a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5 as bias resistors;

[0060] Among them, the second resistor R2 is connected in series to the circuit connecting the collector of the third switch tube circuit 142 and the input end of the H-bridge circuit 141, the third resistor R3 is connected in series to the circuit connecting the first control end of the H-bridge circuit 141 and the collector of the third switch tube circuit 142, the fourth resistor R4 is connected in series to the circuit connecting the input end of the H-bridge circuit 141 and the collector of the fourth switch tube circuit 143, and the fifth resistor R5 is connected in series to the circuit connecting the second control end of the H-bridge circuit 141 and the collector of the fourth switch tube circuit 143.

[0061] As an implementation of the H-bridge circuit 141, the H-bridge circuit 141 may include a fifth switch tube circuit 144, a sixth switch tube circuit 145, a seventh switch tube circuit 147 and an eighth switch tube circuit 148;

[0062] Among them, the emitter of the fifth switch tube circuit 144 is connected to the input end of the H-bridge circuit 141, the base is connected to the first control end of the H-bridge circuit 141, and the collector is connected to the first output end of the H-bridge circuit 141; the emitter of the sixth switch tube circuit 145 is connected to the input end of the H-bridge circuit 141, the base is connected to the second control end of the H-bridge circuit 141, and the collector is connected to the second output end of the H-bridge circuit 141; the emitter of the seventh switch tube circuit 147 is connected to the first output end of the H-bridge circuit 141, the collector is connected to the third output end of the H-bridge circuit 141, and the base is connected to the second control end of the H-bridge circuit 141; the emitter of the eighth switch tube circuit 148 is connected to the second output end of the H-bridge circuit 141, the base is connected to the first control end of the H-bridge circuit 141, and the collector is connected to the collector of the seventh switch tube circuit 147.

[0063] For example, one control terminal of the pulse stimulation circuit 140 is LOWC_B, and the other control terminal is LOWC_A. Then, when LOWC_B inputs a high level, the third switch tube circuit 142 will be turned on, and the T1 point (the connection point between the collector of the third switch tube circuit 142 and the first control terminal of the H-bridge circuit 141) will be low level, thereby turning on the fifth switch tube circuit 144 and the eighth switch tube circuit 148, so that the positive electrode sheet DP+ and the negative electrode sheet DP- are connected to the human body to form a loop. , at this time DP+ is the high-voltage positive terminal, and DP- is the low-voltage negative terminal; when LOWC_A inputs a high level, the fourth switch tube circuit 143 will be turned on, and the T2 point (the connection point between the collector of the fourth switch tube circuit 143 and the second control terminal of the H-bridge circuit 141) is low level, thereby turning on the sixth switch tube circuit 145 and the seventh switch tube circuit 147, so that the positive electrode sheet DP+ and the negative electrode sheet DP- are connected to the human body to form a loop. At this time, DP+ is the low-voltage negative terminal, and DP- is the high-voltage positive terminal.

[0064] The combined waveform of LOWC_A and LOWC_B forms an alternating positive and negative electrical pulse stimulation signal, such as Figure 5 shown.

[0065] Reference Figure 4 The pulse stimulation circuit 140 also includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10 as current limiting resistors, wherein the seventh resistor R7 is connected in series to the base of the third switch tube circuit 142, the eighth resistor R8 is connected in series to the base of the fourth switch tube circuit 143, the ninth resistor R9 is connected in series to the base of the seventh switch tube circuit 147, and the tenth resistor R10 is connected in series to the base of the eighth switch tube circuit 148.

[0066] Reference Figure 6 As an implementation of the detection circuit 150, the detection circuit 150 may include a ninth switch tube circuit 151, the base of the ninth switch tube circuit 151 is connected to the input end of the detection circuit 150, the emitter is grounded, and the collector is connected to the output end of the detection circuit 150.

[0067] In order to provide a stable static operating point for the ninth switch tube circuit 151 and limit the drift point of the detection circuit 150, the detection circuit 150 also includes a sixth resistor R6, one end of the sixth resistor R6 is grounded, and the other end is connected to the input end of the detection circuit 150.

[0068] In order to provide a stable voltage point for the ninth switch tube circuit 151, the detection circuit 150 also includes a first diode D1, the anode of the first diode D1 is grounded, and the cathode is connected to the circuit connected to the other end of the sixth resistor R6 and the base of the ninth switch tube circuit 151.

[0069] The detection circuit 150 also includes an eleventh resistor R11 as a current limiting resistor, one end of the eleventh resistor R11 is connected to the base of the ninth switch tube circuit 151, and the other end is connected to the cathode of the first diode D1.

[0070] For example, the output end of the detection circuit 150 is P_SENCE. When P_SENCE is at a low level, it indicates that the ninth switch tube circuit 151 is turned on. At this time, the input end of the detection circuit 150 is at a high level, and the two electrode sheets are connected to the human body; when P_SENCE is at a high level, the ninth switch tube circuit 151 is in an off state. At this time, the input end of the detection circuit 150 is at a low level, and the two electrode sheets are suspended.

[0071] Among them, the first switch tube circuit 131, the second switch tube circuit 133, the third switch tube circuit 142, the fourth switch tube circuit 143 and the ninth switch tube circuit 151 can use NPN transistors, and the fifth switch tube circuit 144, the sixth switch tube circuit 145, the seventh switch tube circuit 147 and the eighth switch tube circuit 148 can use PNP transistors; in addition, in other embodiments, the first switch tube circuit 131, the second switch tube circuit 133, the third switch tube circuit 142, the fourth switch tube circuit 143 and the ninth switch tube circuit 151 can use NPN transistors, and the fifth switch tube circuit 144, the sixth switch tube circuit 145, the seventh switch tube circuit 147 and the eighth switch tube circuit 148 can use PNP transistors. The third switch tube circuit 142, the fourth switch tube circuit 143 and the ninth switch tube circuit 151 can use PNP type transistors, the fifth switch tube circuit 144, the sixth switch tube circuit 145, the seventh switch tube circuit 147 and the eighth switch tube circuit 148 can use NPN type transistors, and the PWM waveform for turning on the first switch tube circuit 131, the second switch tube circuit 133, the third switch tube circuit 142 and the fourth switch tube circuit 143 can be set by the manufacturer.

[0072] It should be noted that the PWM waveform in this application uses low-frequency pulses, i.e., pulse currents below 1000 Hz; the low-frequency pulses include TENS pulses and EMS pulses. TENS pulses: small-scale, low-voltage electrical pulses are sent to specific nerves through electrodes placed on the skin. The purpose is to change the way neurons send signals, prevent pain signals from reaching the brain, and achieve the effect of relieving pain. EMS pulses: small, low-voltage electrical pulses are provided to muscles through electrodes placed on the skin to cause muscle contraction, thereby achieving the effect of exercising muscles and restoring muscle vitality. Repeated contraction and relaxation of muscles can also help to improve blood circulation. The two work together to relax muscles, relieve pain, relax nerves, and promote blood circulation.

[0073] In addition, by utilizing the low-frequency pulse signal (TENS+EMS dual pulse) generated by the MCU when it is idle, through two electrodes and the human body, it can simulate tapping, scraping, acupuncture, massage and other modes through different sequence combinations according to the rapidity, slowness and regular duration of the pulse.

[0074] For example, the waveform characteristics of the tapping mode are that there is a long delay between two combined waveforms in a group of effective pulses, and the number of combined waveforms is relatively small, the interval between each group of effective pulses is long, and the number of repetitions of each group of effective pulses is large, thus giving people a tapping feeling. Figure 7 The three waveforms marked 11, 12 and 13 are combined into a set of complete cycle of the beating mode waveform 14.

[0075] The waveform characteristics of the scraping mode are that the delay between two combined waveforms in a group of effective pulses is short, and the number of combined waveforms is relatively large, which provides a continuous and rapid stimulation experience, giving people a scraping feeling. Figure 8 The two waveforms marked 21 and 22 are combined into a set of complete cycle of scraping mode waveform 23.

[0076] The waveform characteristics of the acupuncture mode are that the delay between the two combined waveforms in the front effective pulse is short, the number of combined waveforms is large, the interval between each group of effective pulses is long, and the effective pulse is repeated 4 times; the delay between the two combined waveforms of the rear effective pulse continues to increase and repeats 2 times; the front section presents a needle-like feeling, and the back end presents a continuous and slight change in strength; it gives people a feeling of acupuncture. Fig. 9 The three waveforms marked 31, 32 and 33 are combined into a complete cycle of acupuncture mode waveform 34.

[0077] The waveform characteristics of the massage mode are that the number of effective pulse combination waveforms in the first section is relatively small, and the interval time varies; the delay between the two effective pulse combination waveforms in the second section continues to increase or decrease; the first section presents a kneading feeling, and the back section presents a continuous change in lightness and heaviness; it gives people a massage feeling. Fig.10 The two waveforms marked 41 and 42 are combined into a set of complete cycle massage mode waveform 43.

[0078] The automatic combination mode characteristic waveform includes the characteristic waveforms of four modes: tapping mode, scraping mode, acupuncture mode, and massage mode. Fig.11 The eight waveforms marked 51, 52, 53, 54, 55, 56, 57 and 58 are combined into a set of complete cycle automatic combination mode waveforms 59.

[0079] The implementation principle of the embodiment of the present application is:

[0080] When the control module 120 detects that the detection circuit 150 outputs a low level, the two electrode sheets are connected to the human body, and the pulse stimulation circuit 140 can work normally. The control module 120 inputs a DC-PWM waveform, so that the power of the power supply module 110 is stored on the first capacitor C1, and then the control module 120 inputs an OL-PWM waveform, so that the first capacitor C1 is discharged, so that the boost circuit 130 supplies power to the pulse stimulation circuit 140; then the control module 120 synchronously inputs complementary LOWC_A and LOWC_B PWM waveforms, so that there is a pressure difference between the two electrode sheets, thereby achieving the purpose of low-frequency pulse stimulation; by changing the duration of the PWM waveforms of LOWC_A and LOWC_B, and different sequence combinations, tapping, massage, acupuncture, scraping and automatic combination modes can be simulated.

[0081] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in sequence. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. An electric pulse stimulation circuit, characterized in that: The invention comprises a control module (120), a boost circuit (130), a pulse stimulation circuit (140), a detection circuit (150) and two electrode sheets, wherein the pulse stimulation circuit (140) comprises three output ends and two control ends; wherein the input end of the control module (120) is respectively connected to the output end of a power supply module (110) and the output end of the detection circuit (150), and the output end of the control module (120) is respectively connected to the input end of the boost circuit (130) and the two control ends of the pulse stimulation circuit (140); the output end of the boost circuit (130) is connected to the input end of the pulse stimulation circuit (140), and the input end of the boost circuit (130) is connected to the output end of the power supply module (110); the first output end of the pulse stimulation circuit (140) is connected to one of the electrode sheets, the second output end is connected to the other of the electrode sheets, and the third output end is connected to the input end of the detection circuit (150); The boost circuit (130) comprises a first inductor L1, a first polarized capacitor C1, a first switch tube circuit (131), a rectifier circuit (132), a first resistor R1 and a second switch tube circuit (133), and the boost circuit (130) has two control terminals; one end of the first inductor L1 is connected to the input terminal of the boost circuit (130), and the other end is respectively connected to the collector of the first switch tube circuit (131) and the input terminal of the rectifier circuit (132); the emitter of the first switch tube circuit (131) is grounded, and the base is connected to a control terminal of the boost circuit (130). The output end of the rectifier circuit (132) is connected to the positive electrode of the first polar capacitor C1, and the negative electrode of the first polar capacitor C1 is grounded; one end of the first resistor R1 is respectively connected to the positive electrode of the first polar capacitor C1 and the output end of the boost circuit (130), and the other end of the first resistor R1 is connected to the collector of the second switch tube circuit (133); the emitter of the second switch tube circuit (133) is grounded, and the base is connected to the other control end of the boost circuit (130); the charging speed of the first inductor R1 is greater than the discharging speed of the first resistor R1; The duty cycle of the PWM waveform input to the base of the first switch tube circuit (131) is fixed, and the PWM waveform input to the base of the second switch tube circuit (133) is adjustable; wherein the two PWM waveforms are synchronously input to the control end of the corresponding boost circuit (130); The boost circuit (130) further comprises a filter subcircuit (134), wherein an input end of the filter subcircuit (134) is connected to a control end of the boost circuit (130), and an output end of the filter subcircuit (134) is connected to a base of the first switch tube subcircuit; The pulse stimulation circuit (140) comprises an H-bridge circuit (141), a third switch tube circuit (142) and a fourth switch tube circuit (143); the H-bridge circuit (141) comprises three output terminals and four control terminals, and the three output terminals are three output terminals of the pulse stimulation circuit (140); wherein the base of the third switch tube circuit (142) is connected to a control terminal of the pulse stimulation circuit (140), the collector is respectively connected to the first control terminal and the input terminal of the H-bridge circuit (141), and the emitter is grounded; the fourth switch tube circuit (143) comprises three output terminals and four control terminals, and the three output terminals are three output terminals of the pulse stimulation circuit (140); wherein the base of the third switch tube circuit (142) is connected to a control terminal of the pulse stimulation circuit (140), the collector is respectively connected to the first control terminal and the input terminal of the H-bridge circuit (141), and the emitter is grounded; The base of the third switch tube circuit (142) is connected to the other control end of the pulse stimulation circuit (140), the collector is respectively connected to the second control end and the input end of the H-bridge circuit (141), and the emitter is grounded; the third control end of the H-bridge circuit (141) is connected to the second control end of the H-bridge circuit (141), and the fourth control end of the H-bridge circuit (141) is connected to the first control end of the H-bridge circuit (141); wherein the PWM waveform input to the base of the third switch tube circuit (142) and the PWM waveform input to the base of the fourth switch tube circuit are complementary waveforms; The pulse stimulation circuit (140) further includes a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5; wherein the second resistor R2 is connected in series to a circuit connecting the collector of the third switch tube circuit (142) and the input end of the H-bridge circuit (141); the third resistor R3 is connected in series to a circuit connecting the first control end of the H-bridge circuit (141) and the collector of the third switch tube circuit (142); the fourth resistor R4 is connected in series to a circuit connecting the input end of the H-bridge circuit (141) and the collector of the fourth switch tube circuit (143); and the fifth resistor R5 is connected in series to a circuit connecting the second control end of the H-bridge circuit (141) and the collector of the fourth switch tube circuit (143); The H-bridge circuit (141) comprises a fifth switch tube circuit (144), a sixth switch tube circuit (145), a seventh switch tube circuit (147) and an eighth switch tube circuit (148); wherein the emitter of the fifth switch tube circuit (144) is connected to the input end of the H-bridge circuit (141), the base is connected to the first control end of the H-bridge circuit (141), and the collector is connected to the first output end of the H-bridge circuit (141); the emitter of the sixth switch tube circuit (145) is connected to the input end of the H-bridge circuit (141), the base is connected to the first control end of the H-bridge circuit (141), and the collector is connected to the first output end of the H-bridge circuit (141). The emitter of the seventh switch tube circuit (147) is connected to the first output end of the H-bridge circuit (141), the collector is connected to the third output end of the H-bridge circuit (141), and the base is connected to the second control end of the H-bridge circuit (141); the emitter of the eighth switch tube circuit (148) is connected to the second output end of the H-bridge circuit (141), the base is connected to the first control end of the H-bridge circuit (141), and the collector is connected to the collector of the seventh switch tube circuit (147); The detection circuit (150) comprises a ninth switch tube circuit (151), wherein the base of the ninth switch tube circuit (151) is connected to the input end of the detection circuit (150), the emitter is grounded, and the collector is connected to the output end of the detection circuit (150); The detection circuit (150) further comprises a sixth resistor R6, one end of the sixth resistor R6 is grounded, and the other end is connected to the input end of the detection circuit (150); The detection circuit (150) also includes a first diode D1, wherein the positive electrode of the first diode D1 is grounded, and the negative electrode is connected to a circuit connected to the other end of the sixth resistor R6 and the base of the ninth switch tube circuit (151).

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