CN101428165A - Physiotherapy equipment for treating peripheral nerve pathological changes of diabetes - Google Patents

Abstract

A physical therapy instrument for treating diabetic peripheral neuropathy, belonging to the technical field of medical devices, including a power supply 1, an intelligent controller 2, a button interface 3, a digital display 4, a polarity control circuit 5, a pulse control circuit 6, and a self-test circuit 7 1. The first step-up transformer 8, the output electrode 9 and the casing 10 use the mutual inductance of the two coils to generate an induced current in the opposite direction, and use the double-surface electrodes to form a loop locally to generate a low-frequency sine wave, imitating muscle biology The frequency and intensity of electrical stimulation can improve blood and lymphatic circulation in local tissues, regulate the normal operation of human bioelectricity, create a microenvironment for peripheral nerve repair, and accelerate the growth of nerve axons and the proliferation of Schwann cells. Establishment of a new treatment paradigm for diabetic peripheral neuropathy.

Description

Physiotherapy Apparatus for Treating Diabetic Peripheral Neuropathy

technical field

The invention relates to a physical therapy instrument for treating diabetic peripheral neuropathy, belonging to the technical field of medical devices.

Background technique

The incidence of diabetes is increasing year by year. At present, there are more than 200 million diabetics in the world, and this number is expected to increase to 350 million by 2025. Chronic complications of diabetes are an important cause of disability and death in diabetic patients. Every year, 200,000 people die from diabetes-related complications, which has become the third major disease that threatens human health. Diabetic peripheral neuropathy is one of the most common chronic complications of diabetes. Statistics show that 80% to 100% of diabetic patients have various degrees of peripheral neuropathy through detailed neurological examination. Patients may experience pain, numbness, burning, acupuncture and other symptoms, which seriously interfere with sleep and reduce the quality of life.

Electric stimulation therapy is currently recognized as one of the effective methods for the treatment of peripheral neuropathy. Most of the existing physiotherapy instruments on the market use simple electronic control to generate high-voltage direct current pulse stimulation with low-frequency oscillation, voltage regulation and frequency multiplication, or transformer boosting technology to achieve The purpose of electrical stimulation therapy, the main shortcomings are: 1. The DC pulse stimulation intensity is large, the coverage is small, and the stimulation intensity increases with the increase of the stimulation depth, which is prone to burns; 3. The intelligent function of man-machine dialogue is weak, and it is difficult to adjust and set accurately; 4. The circuit self-test function is lacking, and the working status of the physical therapy instrument cannot be corrected; 5. The circuit operation and static power consumption are relatively low. 6. There are many stimulation waves for clinical use, but there is a lack of individualized treatment modes for diseases, and inappropriate electrical stimulation brings greater treatment risks. In my country, manufacturing institutions and research institutions have not been able to produce a physical therapy instrument for the treatment of diabetic peripheral neuropathy.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a portable physiotherapy instrument for treating diabetic peripheral neuropathy. The mutual inductance of two coils is used to generate induced currents in opposite directions, and the double-surface electrodes are used to locally form a loop to generate Low-frequency sine waves imitate the frequency and intensity of muscle bioelectric stimulation, thereby improving the blood and lymph circulation of local tissues, regulating the normal operation of human bioelectricity, creating a microenvironment for peripheral nerve repair, and accelerating the growth and development of nerve axons. The role of Schwann cell proliferation to establish a new treatment model for diabetic peripheral neuropathy.

In order to achieve the above object, the present invention adopts the following technical solutions, which are described below in conjunction with the accompanying drawings.

A physical therapy instrument for treating diabetic peripheral neuropathy, comprising a power supply 1, an intelligent controller 2, a button interface 3, a digital display 4, a power switch S8 and a casing 10, the power supply 1 is composed of three DC stabilized power supplies, and the three DC The regulated output terminals of the regulated power supply are respectively +5 volts, -5 volts and VCC, the output voltage of the VCC is +9 volts, the common point grounding wire of the three DC regulated power supplies, and the intelligent controller 2 is a single-chip microcomputer , in the internal memory of the single-chip microcomputer, there is a program for directing and ordering the CPU of the single-chip microcomputer to perform the following operations. The output signal is required, the P00 terminal of the intelligent controller 2 is connected to point A, the P26 terminal of intelligent controller 2 is connected to point B, the WR terminal of intelligent controller 2 is connected to point C, and the P27 terminal of intelligent controller 2 is connected to point D Point connection, the P17 terminal of the intelligent controller 2 is connected with the point E, the INT1 terminal of the intelligent controller 2 is connected with the F point, the INT0 terminal of the intelligent controller 2 is connected with the G point, and the button interface 3 includes seven buttons, which are selected Treatment setting key S1, treatment intensity increase key S2, treatment intensity reduction key S3, treatment time increase key S4, treatment time decrease key S5, treatment start key S6, treatment stop key S7, the digital display 4 includes three display screens , they are the selection display LCD1, the treatment intensity display LCD2 and the treatment time display LCD3, the button interface 3, the digital display 4, and the power switch S8 are installed on the top surface of the casing, and it is characterized in that it also includes polarity control Circuit 5, pulse control circuit 6, self-test circuit 7, first step-up transformer 8 and output electrode 9, polarity control circuit 5 includes first resistor R15, second resistor R16, first capacitor C5, first NOT gate U8A , the second NOT gate U8B, the third NOT gate U8D, the fourth NOT gate U8C, the first transistor Q2 and the second transistor Q3, the pulse control circuit 6 includes a third resistor R117, a first potentiometer POT1, a second capacitor C6, The third capacitor C7, the fourth capacitor C4, the first diode D101, the second diode D102, the first DA converter U3, the second DA converter U4, the first operational amplifier U5A, the second operational amplifier U6A, The third operational amplifier U5B and the third transistor Q1, the self-test circuit 7 includes a fourth resistor R26, a fifth resistor R25, a sixth resistor R24, a seventh resistor R23, an eighth resistor R21, a ninth resistor R22, and a tenth resistor R29 , the eleventh resistor R20, the twelfth resistor R19, the fifth capacitor C8, the third diode D103, the first comparator U7A, the second comparator U7B, the third comparator U7C and the fourth comparator U7D, rise The voltage transformer 8 includes a thirteenth resistor R18, a first step-up transformer T1, a first zener diode D104, a second zener diode D105, the output electrode 9 includes a first electrode OUT1 and a second electrode OUT2, a first transistor Q2, The second transistor Q3 and the third crystal The body tube Q1 is of NPN type, the step-up transformer 8 is the first step-up transformer T1, the number of turns of the primary coil of the first step-up transformer T1 is 60, the center tap, the turns of the secondary coil of the first step-up transformer T1 The number is 2200, the rated stable voltage of the first zener diode D104 and the second zener diode D105 is 200 volts, and the Vcc end of the first DA converter U3 is connected to the Vcc end of the second DA converter U4 to +5 volts terminal connection, the ground terminal of the first DA converter U3 is connected to the ground terminal of the second DA converter U4 and then connected to the ground wire, the D10 terminal, D11 terminal, D12 terminal, D13 terminal, and D14 terminal of the first DA converter U3 , D15, D16, D17, D10, D11, D12, D13, D14, D15, D16, D17 of the second DA converter U4 are connected together, the first DA converter U3 The WR1 end of the first DA converter U3, the WR2 end of the first DA converter U3, the WR1 end of the second DA converter U4, and the WR2 end of the second DA converter U4 are connected together, and the CS end of the first DA converter U3 is connected to the first DA converter U3 The Xfer terminals of the converter U3 are connected together, the CS terminal of the second DA converter U4 is connected together with the Xfer terminal of the second DA converter U4, the ILE terminal of the first DA converter U3 is connected to the +5 volt terminal, and the second DA converter U4 is connected to the +5 volt terminal. The Iout end of a DA converter U3 is connected to the ground wire, the Vref end of the first DA converter U3 is connected to the Rfb end of the second DA converter U4, and the Vref end of the second DA converter U4 is connected to the second DA converter U4 The ILE terminal of the second operational amplifier U5A is connected to the +5 volt terminal after being connected, the Iout2 terminal of the second DA converter U4 is connected to the ground wire, the positive power supply terminal of the first operational amplifier U5A, and the positive power supply terminal of the second operational amplifier U6A are connected to the +9 volt terminal Connection, the negative power supply terminal of the first operational amplifier U5A, the negative power supply terminal of the second operational amplifier U6A are connected to the -5 volt terminal, the first capacitor C5 is connected between the -5 volt terminal and the ground wire, the first operational amplifier U5A The positive input end and the negative input end of the first DA converter U3 are respectively connected with the Iout1 end and the Iout2 end of the first DA converter U3, and the positive input end and the negative input end of the second operational amplifier U6A are connected with the Iout1 end and the Iout2 end of the second DA converter U4 respectively. The output terminal of the first operational amplifier U5A is connected with the Rbf terminal of the first DA converter U3 and the positive input terminal of the third operational amplifier U5B respectively, and the output terminal of the second operational amplifier U6A is connected with the positive input terminal of the second DA converter U4 The Rfb terminal is connected, the two ends of the first potentiometer POT1 are connected between the output terminal of the third operational amplifier U5B and the ground wire, the negative input terminal of the third operational amplifier U5B is connected to the sliding arm of the first potentiometer POT1, and the second The output terminal of the three operational amplifiers U5B is connected to the base of the third transistor Q1, and the third resistor R117, the second capacitor C6 and the third capacitor C7 are connected in parallel and connected between the emitter of the third transistor Q1 and the ground, The collector of the third transistor Q1 is connected to +9 volts The emitter of the third transistor Q1 is connected to the center tap of the first step-up transformer T1, the input terminal and the output terminal of the first NOT gate U8A are respectively connected to the input terminal and the output terminal of the second NOT gate U8B, and the first The output end of the NOT gate U8A is connected to the base of the first transistor Q2 through the first resistor R15, the collector of the first transistor Q2 is connected to one end of the primary coil of the first step-up transformer T1, and the emitter of the first transistor Q2 is connected to the ground. The input terminal and the output terminal of the third NOT gate U8C are respectively connected with the input terminal and the output terminal of the fourth NOT gate U8D, and the output terminal of the third NOT gate U8C is connected with the base of the second transistor Q3 through the second resistor R16 The collector of the second transistor Q3 is connected to the other end of the primary coil of the first step-up transformer T1, the emitter of the second transistor Q3 is connected to the ground, and the cathode and anode of the first diode D101 are respectively connected to the first transistor The collector of Q2 is connected to the ground wire, the cathode and anode of the second diode D102 are respectively connected to the collector and ground wire of the second transistor Q3, the positive power supply terminal and the negative power supply terminal of the first comparator U7A are respectively connected to +5 The volt terminal is connected to the -5 volt terminal, the positive input terminal of the second comparator U7B is connected to the ground wire, the sixth resistor R24 is connected between the output terminal and the negative input terminal of the second comparator U7B, and the fifth resistor R25 One end is connected to the negative input end of the second comparator U7B, the cathode and anode of the third diode D103 are respectively connected to the other end of the fifth resistor R25 and the output end of the first comparator U7A, the fifth capacitor C8 and the fourth The resistor R26 is connected in parallel between the cathode of the third diode D103 and the ground wire, the seventh resistor R23 is connected between the negative input terminal of the first comparator U7A and the ground wire, and the negative input terminal of the fourth comparator U7D The input terminal is connected with the output terminal of the fourth comparator U7D, the eighth resistor R21 is connected between the negative input terminal of the fourth comparator U7D and the negative input terminal of the first comparator U7A, and the negative input terminal of the third comparator U7C terminal is connected with the output terminal of the third comparator U7C, the ninth resistor R22 is connected between the negative input terminal of the third comparator U7C and the positive input terminal of the first comparator U7A, the first zener diode D104 and the second Zener diodes D105 are connected in back-to-back series across the two ends of the secondary coil of the first step-up transformer T1, and the thirteenth resistor R18 is connected between one end of the secondary coil of the first step-up transformer T1 and the first electrode OUT1, The other end of the secondary coil of the first step-up transformer T1 is connected to the second electrode OUT2, and the twelfth resistor R19 is connected across one end of the secondary coil of the first step-up transformer T1 connected to the thirteenth resistor R18 and the fourth comparator Between the positive input terminals of U7D, the eleventh resistor R20 is connected between the positive input terminal of the third comparator U7C and the first electrode OUT1, and the D10 terminal of the first DA converter U3 is connected to point A, and the first DA conversion The CS end of the comparator U3 is connected to point B, the WR1 end of the first DA converter U3 is connected to point C, the CS end of the second DA converter U3 is connected to point D, and the output end of the second comparator U7B is connected to point E Then, the input terminal of the first NOT gate U8A is connected to point F, and the input terminal of the third NOT gate U8C is connected to point G.

Brief working principle:

1. Power switch S8: Connect the mains 220V/50HZ AC to make the instrument enter the standby state.

2. Treatment mode selection S1: The treatment mode selection adopts reincarnation incremental mode conversion, each time the key is pressed, the mode is converted once, digital display 1, output continuous wave, digital display 2, output burst wave, digital display 3, output variable amplitude wave , digital display 4, output composite wave.

3. Treatment start S6, treatment stop S7: Press the treatment start S6 key, the instrument starts to work, at this time the output intensity is zero, the timing has started, until the set time automatically stops. Press the treatment stop S7 key, the instrument stops working and enters the standby state.

4. Treatment intensity increase S2, treatment intensity decrease key S3: After the instrument starts to work, press the treatment intensity increase S2, the output intensity of the instrument will gradually increase, and the digital display output intensity will gradually increase, press the treatment intensity decrease key S3, the instrument output intensity will gradually decrease Small, the digital display output intensity gradually decreases.

5. The treatment time is increased by S4, and the treatment time is decreased by S5: set the time before the treatment starts, increase the treatment time by S4, the treatment time will be extended, and the digital display will increase the treatment time, and the treatment time will be decreased by S5, the treatment time will be shortened, and the digital display will treat Time decreases.

6. Except for the power switch S8, all other 7 buttons are connected to the smart controller 2. Pressing each button will automatically generate a button code, and the smart controller 2 will make corresponding processing according to different codes.

Compared with the existing physical therapy instrument technology, the physical therapy instrument of the present invention has the following advantages:

1. Using variable-amplitude waves and constantly changing impulse signals, the nerves in the deep and shallow parts under the electrodes are fully excited, providing a good dynamic environment for nerve regeneration.

2. Using two-way waves, the output electrodes do not need to distinguish between positive and negative polarities, and positive and negative waves occur at the same time, with a phase difference of 180° and the same amplitude, and the effect of adding twice the amplitude between the two poles is obtained, which expands the area of action and strengthens physical therapy Efficacy, while reducing the pulse intensity, avoiding burn events.

3. Two DA converters are used to control the pulse output, which realizes the continuous adjustment of amplitude, frequency and pulse width, overcomes the patient's discomfort when adjusting the mode and intensity during physical therapy, and realizes digital display and Adjustment improves the intelligence of man-machine dialogue.

4. Using a variety of low-frequency and low-voltage pulses and current pulse combination therapy with matching methods can achieve the purpose of varying from person to person and step by step, and improve the safety of treatment.

5. Nerve impulses are transmitted to the brain and pituitary gland, causing the release of morphine-like polypeptides in the brain, which can achieve analgesic effect.

6. The physiotherapy instrument is easy to operate, and the size of the casing and the material of the casing have a large heat dissipation space, which prolongs the continuous use time.

Description of drawings

Fig. 1 is the schematic diagram of the panel of the physical therapy instrument of the present invention, wherein, LCD1 is the treatment mode selection display screen, LCD2 is the treatment intensity display screen, LCD3 is the treatment time display screen, S1 is the selection treatment setting key, S2 is the treatment intensity increase key, S3 It is the key to reduce the treatment intensity, S4 is the key to increase the treatment time, S5 is the key to decrease the treatment time, S6 is the key to start the treatment, S7 is the key to stop the treatment, and S8 is the power switch.

Fig. 2 is the functional block diagram of the physical therapy apparatus of the present invention, wherein, 1 is power supply, 2 is intelligent controller, 3 is button interface, 4 is digital display, 5 is polarity control circuit, 6 is pulse control circuit, 7 is self-inspection circuit, 8 is the step-up transformer, and 9 is the output electrode.

Fig. 3 is a circuit diagram of the core part of the physical therapy instrument of the present invention.

Detailed ways

Now in conjunction with the accompanying drawings and embodiments, the present invention will be further described.

Example 1

This embodiment has the same circuit as the physical therapy instrument described in the summary of the invention, and only the key technical data are listed below:

The model of the first DA converter U3 is DAC0823;

The model of the second DA converter U4 is DAC0823;

The models of the first operational amplifier U5A and the third operational amplifier U5B are LM358;

The model of the second operational amplifier U6A is LM358;

The models of the first NOT gate U8A, the second NOT gate U8B, the third NOT gate U8D and the fourth NOT gate U8C are 74LS04;

The models of the first comparator U7A, the second comparator U7B, the third comparator U7C and the fourth comparator U7D are CA084;

The models of the first transistor Q2, the second transistor Q3 and the third transistor Q1 are TIP41C;

The models of the first diode D101, the second diode D102 and the third diode D103 are 1N4148;

The rated stable voltage of the first zener diode D104 and the second zener diode D105 is 200 volts.

The control method of the present embodiment is as follows:

1. Start the controller power supply: AC220V, 50Hz±1Hz power supply, system initialization and port settings;

2. Start up: press the power switch S8 to start up, display a green light, press it again to shut down, and the green light is off;

3. Setting of treatment mode: Press the selection treatment setting key S1 to enter the output waveform combination mode setting, select ① mode 1 (continuous wave), pulse frequency is 2Hz, pulse width 200us, select ② mode 2 (burst wave ), pulse frequency 2Hz, pulse width 200us, select ③ mode 3 (variable amplitude wave), pulse frequency 2Hz and 100Hz alternately, each frequency lasts 1 minute, interval 3 seconds, pulse width: 200us, select ④ mode 4 (comprehensive Wave), mode 1, mode 2, mode 3 wave combined cycle, the allowable error of the above frequency is ±5%, and the allowable error of wave width is ±20%;

4. Setting of working time: press the treatment time increase key S4 and treatment time decrease key S5 to adjust the treatment time length, and the set value is not more than 4 hours;

5. Start/stop treatment: clean the skin of the stimulated part, place the electrode sheet on the neuromuscular injury, press the treatment start button S6 to start the treatment, LCD3 displays the countdown time, the decimal point of the time digital tube is flashing, and the countdown is 0 when intelligent control The output of the device stops, and the treatment can be terminated at any time by pressing the treatment stop key S7 during the process;

6. Setting of treatment intensity: During the treatment process, press the treatment intensity increase key S2 and the treatment intensity decrease key S3 to continuously adjust the output power, and the set value is not greater than 40.

Claims (2)

1. A physical therapy instrument for treating diabetic peripheral neuropathy, comprising a power supply (1), an intelligent controller (2), a button interface (3), a digital display (4), a power switch (S8) and a casing (10), The power supply (1) is composed of three DC regulated power supplies, the regulated output terminals of the three DC regulated power supplies are respectively +5 volt terminal, -5 volt terminal and VCC terminal, the output voltage of VCC terminal is +9 volt, and the three The public point grounding wire of the DC stabilized voltage supply, the intelligent controller (2) is a single-chip microcomputer, and there is a program for directing and ordering the CPU of the single-chip microcomputer to perform the following operations in the memory of the single-chip microcomputer. ) the key signal sent, drive the digital display (4) to display the meaning of the key signal, output the signal required by the key signal output, the P00 terminal of the intelligent controller (2) is connected with point A, and the P26 terminal of the intelligent controller (2) Connect with point B, the WR terminal of the intelligent controller (2) is connected with point C, the P27 terminal of the intelligent controller (2) is connected with point D, the P17 terminal of the intelligent controller (2) is connected with point E, and the intelligent controller The INT1 end of (2) is connected with the F point, the INT0 end of the intelligent controller (2) is connected with the G point, and the button interface (3) includes seven buttons, which are the selection treatment setting key (S1), the treatment intensity increase key (S2), treatment intensity decrease key (S3), treatment time increase key (S4), treatment time decrease key (S5), treatment start key (S6), treatment stop key (S7), digital display (4) includes Three display screens, they are selection display screen (LCD1), treatment intensity display screen (LCD2) and treatment time display screen (LCD3), key interface (3), digital display (4), power switch (S8) are installed on the machine The top surface of the shell is characterized in that it also includes a polarity control circuit (5), a pulse control circuit (6), a self-test circuit (7), a step-up transformer (8) and an output electrode (9), and the polarity The control circuit (5) includes a first resistor (R15), a second resistor (R16), a first capacitor (C5), a first NOT gate (U8A), a second NOT gate (U8B), and a third NOT gate (U8D) , the fourth NOT gate (U8C), the first transistor (Q2) and the second transistor (Q3), the pulse control circuit (6) includes the third resistor (R117), the first potentiometer (POT1), the second capacitor (C6 ), the third capacitor (C7), the fourth capacitor (C4), the first diode (D101), the second diode (D102), the first DA converter (U3), the second DA converter (U4 ), the first operational amplifier (U5A), the second operational amplifier (U6A), the third operational amplifier (U5B) and the third transistor (Q1), the self-test circuit (7) includes the fourth resistor (R26), the fifth resistor (R25), sixth resistor (R24), seventh resistor (R23), eighth resistor (R21), ninth resistor (R22), tenth resistor (R29), eleventh resistor (R20), twelfth resistor Resistor (R19), fifth capacitor (C 8), third diode (D103), first comparator (U7A), second comparator (U7B), third comparator (U7C) and fourth comparator (U7D), step-up transformer (8) Including the thirteenth resistor (R18), the first step-up transformer (T1), the first zener diode (D104), the second zener diode (D105), the output electrode (9) includes the first electrode (OUT1) and the second The two electrodes (OUT2), the first transistor (Q2), the second transistor (Q3) and the third transistor (Q1) are NPN type, the step-up transformer (8) is the first step-up transformer (T1), the first step-up The number of turns of the primary coil of the voltage transformer (T1) is 60, the center tap, the number of turns of the secondary coil of the first step-up transformer (T1) is 2200, the first Zener diode (D104) and the second Zener diode ( The rated stable voltage of D105) is 200 volts, the Vcc end of the first DA converter (U3) is connected with the Vcc end of the second DA converter (U4) and then connected with the +5 volt end, the first DA converter (U3) The ground terminal of the first DA converter (U3) is connected to the ground terminal after being connected to the ground terminal of the second DA converter (U4), and the D10 terminal, D11 terminal, D12 terminal, D13 terminal, D14 terminal, D15 terminal, D16 terminal of the first DA converter (U3) Terminal, D17 terminal, D10 terminal, D11 terminal, D12 terminal, D13 terminal, D14 terminal, D15 terminal, D16 terminal, D17 terminal of the second DA converter (U4) are connected together, the first DA converter (U3) The WR1 terminal, the WR2 terminal of the first DA converter (U3), the WR1 terminal of the second DA converter (U4), and the WR2 terminal of the second DA converter (U4) are connected together, and the first DA converter (U3) The CS end of the first DA converter (U3) is connected together with the Xfer end of the first DA converter (U3), the CS end of the second DA converter (U4) is connected together with the Xfer end of the second DA converter (U4), and the first DA conversion The ILE end of the device (U3) is connected to the +5 volt end, the Iout end of the first DA converter (U3) is connected to the ground wire, and the Vref end of the first DA converter (U3) is connected to the second DA converter (U4) The Rfb terminal of the second DA converter (U4) is connected to the +5 volt terminal after the Vref terminal of the second DA converter (U4) is connected to the ILE terminal of the second DA converter (U4), and the Iout2 terminal of the second DA converter (U4) is connected to the ground Wire connection, the positive power supply terminal of the first operational amplifier (U5A), the positive power supply terminal of the second operational amplifier (U6A) are connected to the +9 volt terminal, the negative power supply terminal of the first operational amplifier (U5A), the second operational amplifier ( The negative power terminal of U6A) is connected to the -5 volt terminal, the first capacitor (C5) is connected between the -5 volt terminal and the ground, and the positive input terminal and the negative input terminal of the first operational amplifier (U5A) are respectively connected to the first operational amplifier (U5A). The Iout1 end of a DA converter (U3) is connected with the Iout2 end, and the positive input terminal and the negative input end of the second operational amplifier (U6A) are connected with the Iout1 of the second DA converter (U4) respectively. Terminal is connected with Iout2 end, the output end of the first operational amplifier (U5A) is respectively connected with the positive input terminal of the Rbf end of the first DA converter (U3) and the third operational amplifier (U5B), and the second operational amplifier (U6A) The output end of the second DA converter (U4) is connected to the Rfb end of the second DA converter (U4), and the two ends of the first potentiometer (POT1) are connected between the output end of the third operational amplifier (U5B) and the ground wire, and the third operational amplifier The negative input terminal of (U5B) is connected to the sliding arm of the first potentiometer (POT1), the output terminal of the third operational amplifier (U5B) is connected to the base of the third transistor (Q1), and the third resistor (R117), The second capacitor (C6) and the third capacitor (C7) are connected in parallel and connected between the emitter of the third transistor (Q1) and the ground, and the collector of the third transistor (Q1) is connected to the +9 volt terminal. The emitter of the three-transistor (Q1) is connected to the center tap of the first step-up transformer (T1), and the input and output of the first NOT gate (U8A) are respectively connected to the input and output of the second NOT gate (U8B). Connection, the output terminal of the first NOT gate (U8A) is connected to the base of the first transistor (Q2) through the first resistor (R15), and the collector of the first transistor (Q2) is connected to the primary of the first step-up transformer (T1) One end of the coil is connected, the emitter of the first transistor (Q2) is connected to the ground, the input and output of the third NOT gate (U8C) are respectively connected to the input and output of the fourth NOT gate (U8D), and the third The output terminal of the three-inverter (U8C) is connected to the base of the second transistor (Q3) through the second resistor (R16), and the collector of the second transistor (Q3) is connected to the other primary coil of the first step-up transformer (T1). One end is connected, the emitter of the second transistor (Q3) is connected to the ground, the cathode and anode of the first diode (D101) are respectively connected to the collector of the first transistor (Q2) and the ground, and the second diode The cathode and anode of (D102) are respectively connected to the collector and ground of the second transistor (Q3), and the positive power supply terminal and negative power supply terminal of the first comparator (U7A) are respectively connected to the +5 volt terminal and the -5 volt terminal , the positive input terminal of the second comparator (U7B) is connected to the ground wire, the sixth resistor (R24) is connected between the output terminal and the negative input terminal of the second comparator (U7B), and the fifth resistor (R25) One end is connected to the negative input end of the second comparator (U7B), and the cathode and anode of the third diode (D103) are respectively connected to the other end of the fifth resistor (R25) and the output end of the first comparator (U7A) , the fifth capacitor (C8) and the fourth resistor (R26) are connected in parallel between the cathode of the third diode (D103) and the ground, and the seventh resistor (R23) is connected across the first comparator (U7A ) between the negative input terminal of the fourth comparator (U7D) and the ground wire, the negative input terminal of the fourth comparator (U7D) is connected to the output terminal of the fourth comparator (U7D), and the eighth resistor (R21) is connected across the fourth comparator (U7D ) between the negative input of the first comparator (U7A), the third comparator (U7 The negative input of C) is connected to the output of the third comparator (U7C), and the ninth resistor (R22) is connected across the negative input of the third comparator (U7C) and the positive input of the first comparator (U7A). Between the terminals, the first Zener diode (D104) and the second Zener diode (D105) are connected in back-to-back series across the two ends of the secondary coil of the first step-up transformer (T1), and the thirteenth resistor (R18) spans Connected between one end of the secondary coil of the first step-up transformer (T1) and the first electrode (OUT1), the other end of the secondary coil of the first step-up transformer (T1) is connected to the second electrode (OUT2), the tenth Two resistors (R19) are connected between the end connected to the secondary coil of the first step-up transformer (T1) and the thirteenth resistor (R18) and the positive input terminal of the fourth comparator (U7D), and the eleventh resistor ( R20) is connected between the positive input terminal of the third comparator (U7C) and the first electrode (OUT1), the D10 terminal of the first DA converter (U3) is connected to point A, and the terminal of the first DA converter (U3) The CS terminal is connected to point B, the WR1 terminal of the first DA converter (U3) is connected to point C, the CS terminal of the second DA converter (U3) is connected to point D, and the output terminal of the second comparator (U7B) is connected to Point E is connected, the input end of the first NOT gate (U8A) is connected with point F, and the input end of the third NOT gate (U8C) is connected with point G. 2. The physical therapy instrument for treating diabetic peripheral neuropathy according to claim 1, characterized in that, The model of the first DA converter U3 is DAC0823; The model of the second DA converter U4 is DAC0823; The models of the first operational amplifier U5A and the third operational amplifier U5B are LM358; The model of the second operational amplifier U6A is LM358; The models of the first NOT gate U8A, the second NOT gate U8B, the third NOT gate U8D and the fourth NOT gate U8C are 74LS04; The models of the first comparator U7A, the second comparator U7B, the third comparator U7C and the fourth comparator U7D are CA084; The models of the first transistor Q2, the second transistor Q3 and the third transistor Q1 are TIP41C; The models of the first diode D101, the second diode D102 and the third diode D103 are 1N4148; The rated stable voltage of the first zener diode D104 and the second zener diode D105 is 200 volts.

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